San Mateo City Council
May 18, 2026

7738 of 11211
City of San Mateo
Finance
330 W. 20th Ave
San Mateo, CA 94403
(650) 522-7100
• Welcome
000387-0001 Angie H. 09/22/2015 10:09AM

BUSINESS LICENSE
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Remodeling
Business Tax 108.00
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3)
Description: SK
Remodeling
SB1186 State Mandate Fee 1,00
109.00
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Total

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7739 of 11211
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Search Date: 5/27/2021 https://maps.conservation.ca.gov/doggr/wellfinder 7740 of 11211

NATIONAL PIPELINE MAPPING SYSTEM
Legend
Accidents (Liquid)Incidents (Gas)Gas Transmission PipelinesHazardous Liquid Pipelines Pipelines depicted on this map represent gastransmission and hazardous liquid lines only. Gasgathering and gas distribution systems are notrepresented.This map should never be used as a substitute forcontacting a one-call center prior to excavationactivities. Please call 811 before any diggingoccurs.Questions regarding this map or its contents can bedirected to [email protected]: GeographicDatum: NAD83Map produced by the Public Viewer application atwww.npms.phmsa.dot.govDate Printed: May 27, 2021 7741 of 11211

Subject: San Mateo County Environmental Health: Public Records Request Date: Monday, May 17, 2021 at 11:10:25 AM Pacific Daylight Time From: HS_EH_EnvHealth
To: Julie Ferguson
RMD Environmental SoluJons, Inc.:

The records request you submiMed is complete. We have no files for 407 S. B Street, San Mateo related to tanks or hazardous materials.

Environmental Health Services Division
San Mateo County Health
2000 Alameda de las Pulgas, Suite 100
San Mateo, CA 94403
(650) 372-6200 T
(650) 627-8244 F
[email protected]
This e-mail message, including any aMachments, is for the sole use of intended recipient(s) and may contain confidenJal and protected informaJon. Any unauthorized review, use, disclosure or distribuJon is prohibited. If you are not the intended recipient please contact the sender by reply e-mail and destroy all copies of the original message. 7742 of 11211
Printed on Recycled Paper
May 21, 2021
Julie Ann Krachey
[email protected]
530-277-8906
Public Records Request Number: PR2-051421-02
Location(s): 407 South “B” St., San Mateo, CA 94402; APN: 034-179-020 Dear Ms. Krachey:

We have received your Public Records Act Request at the Department of Toxic Substances Control (DTSC). Upon thorough review of our files, we found no records pertaining to the site(s) referenced above.

We were unable to locate an address in the county database using the APNs provided and we are unable to search our records using APNs as our databases do not include this information.

If you have a specific address or cross streets, please let us know.

For information regarding public reports on hazardous waste shipments of generators, transporters, and TSDFs, you can access our Hazardous Waste Tracking System (HWTS) online at: https://hwts.dtsc.ca.gov/. Select the “Reports” tab for search options. If you are interested in retrieving detailed reports, please contact the HWTS unit via e-mail: [email protected] or phone: 1-800-618-6942. Customized reports may require a fee. For copies of manifests, please send an e-mail to [email protected].

In addition, the DTSC provides access to public records online via EnviroStor; another data management system that tracks our efforts in cleanup, permitting, enforcement, and investigation of known/suspected hazardous waste sites and facilities. The available data is updated in realtime. You can access Envirostor online at www.envirostor.dtsc.ca.gov. Navigate the website easily by clicking the "How to Use EnviroStor" tab, then selecting the option “Take a Tour”.

If you have any questions or would like further information regarding your request, please contact me via phone: 510-540-3800 or e-mail: [email protected].

Sincerely,
Carl Rose
Regional Records Coordinator
7743 of 11211

Subject: RE: PRA 20-0929 Records Request
Date: Friday, May 21, 2021 at 4:28:53 PM Pacific Daylight Time From: Wong, Melinda@Waterboards
To: Julie Ferguson
A7achments: image003.png
Hello Julie,
The San Francisco Bay Regional Water Board received your May 14, 2021 file review request, which seeks records related to the address as described below. Based on a thorough search, the San Francisco Bay Water Board does not possess any addiSonal records responsive to your request.

I would recommend please contact the local agency, San Mateo County Health Department for any further informaSon they may have.

Thank you,
Melinda Wong
Management Services Division
San Francisco Bay Water Board
1515 Clay Street, Suite 1400
Oakland, CA 94612
Phone: (510) 622-2430
Fax: (510) 622-2095 direct line for Public Records Act request Email: [email protected]
From: Julie Ferguson <[email protected]>
Sent: Friday, May 14, 2021 12:20 PM
To: Wong, Melinda@Waterboards <[email protected]> Subject: Public Records Request
EXTERNAL:

Hello Melinda,
I am completing a Phase I Environmental Site Assessment for the property located at 407 South B Street in San Mateo (APN 034-179-020). Please advise if records are available.

Thanks and Happy Friday!,
Julie

JULIE ANN KRACHEY

PROJECT

ADMINISTRATOR
www.rmdes.net
102 MILL STREET
GRASS VALLEY, CA 95945
(530) 277-8906
[email protected]
The contents of this email may be confidential. If you are not the intended recipient, please immediately delete, along with all attachments, and advise the sender. 7744 of 11211

Subject: FW: [SMC Fire Department] Public Record Request - new submission Date: Monday, May 24, 2021 at 2:03:33 PM Pacific Daylight Time From: Maria Dayao
To: Julie Ferguson
A7achments: image001.jpg, image003.jpg
Thank you for your request.

For this kind of document, we recommend contacOng the San Mateo County Office of Environmental Health Services to review their records associated with underground storage tanks, above ground storage tanks, oil/water separators, sepOc tanks, hazardous waste, and wells.

Records can be requested here: hWps://ehesubmit.smchealth.org/servlet/guest? service=0&formId=88&saveAcOon=2&enterprise=9.

MARIA “NEN” U. DAYAO
Office Assistant I
San Mateo Consolidated Fire Department
(650) 522-7940 (Office)
*** WORK SCHEDULE: OFF EVERY OTHER MONDAY
From: SMC Fire Department <[email protected]> Sent: Friday, May 14, 2021 12:12 PM
To: PubEd <[email protected]>; Fire <[email protected]>
Subject: [SMC Fire Department] Public Record Request - new submission A site visitor just submitted your form: Public Record Request on SMC Fire Department
Message Details:

Name: RMD Environmental Solutions, Inc.

Email Address: [email protected]
Description of Record Request: I am completing a Phase I Environmental Site Assessment for the property located at 407 South B Street in San Mateo (APN 034-179-020). Please advise if records are available, specifically any hazardous materials records, underground or aboveground storage tanks, environmental health permits or violations, or any spills or leaks.

Type of Document:: Hazardous Materials
Date Range From: Jan 1, 1900
Date Range To: May 14, 2021
Address Associated with Record: 407 South B Street, San Mateo 7745 of 11211

If you think this submission is spam, report it as spam.

To edit your email settings, go to your Inbox on desktop. 7746 of 11211

APPENDIX K

EXCERPTS OF VICINITY REPORT
7747 of 11211
1371 OAKLAND BOULEVARD, SUITE 200 – WALNUT CREEK, CA

FINAL DRAFT
October 27, 2020
Mr. Massimo Kaz
Prometheus Real Estate Group
1900 South Norfolk Street, Suite 150
San Mateo, California 94403

Subject: Phase II Environmental Site Investigation Report 415 and 445 South B Street, San Mateo, California 94401 Dear Mr. Kaz:

RMD Environmental Solutions, Inc., (RMD) has prepared a Phase II Environmental Site Investigation Report (Phase II Report) describing recent investigation activities for 415 and 445 South B Street in San Mateo, California (the Site; Figure 1). The RMD Proposal for Phase I and Phase II Environmental Site Assessment1 described a scope of work to assess whether contamination is present which may trigger an obligation to perform further investigation and/or mitigation measures or which otherwise could result in environmental liability should Prometheus Real Estate Group (Prometheus) purchase the Site for redevelopment. An additional Phase II investigation scope of work was proposed and implemented based on the findings of the initial Phase II investigation. The Site background, investigation objectives, scope of work, and results are provided in the Report sections below.

SITE BACKGROUND
The Site consists of two parcels totaling approximately 23,100 square feet north of East Fifth Avenue and east of South B Street and is identified as San Mateo County Assessor’s parcel numbers (APN) 034-179-030 and 034-179-040. The Site is currently developed with vacant retail units. Details regarding the Site operations, ownership, and improvements are included in the Phase I Environmental Site Assessment (ESA) report, prepared concurrently. The Site is shown on a Site Plan that is provided as Figure 2.

Prometheus intends to remove the existing building and construct commercial space over the entire building footprint. One design option includes an underground parking structure with a 1 RMD, 2020. Proposal for Phase I and Phase II Environmental Site Assessment, 415 and 445 South B Street, San Mateo, California. June 30.
7748 of 11211
SVP-01 SB-01 SB-02 SOUTH RAILROAD AVENUE SB-03 SVP-03EAST 5TH AVENUE SOUTH B STREET EAST 4TH AVENUE 445 SOUTH B ST 415 SOUTH B ST SVP-07 SVP-04 SB-04 SVP-02 SVP-06 SVP-05 SS SS SS SS SS SS SS HORIZONTAL SCALE IN FEET 60 SITE PLANLEGEND 415 & 445 SOUTH B STREET SAN MATEO, CALIFORNIA PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-003 09/2020 DCB KD FIGURE 2 Site Boundary N Soil Vapor Probe Location 0 120Grab Groundwater Sampling Location SVP-01 SB-01 SOURCE: GOOGLE EARTH, 2020 SS Sanitary Sewer 7749 of 11211
SVP-01 SB-01 SB-02 SOUTH RAILROAD AVENUE SB-03 SVP-03EAST 5TH AVENUE SOUTH B STREET EAST 4TH AVENUE 445 SOUTH B ST 415 SOUTH B ST SVP-07 SVP-04 SB-04 SVP-02 SVP-06 SVP-05 SS SS SS SS SS SS SS HORIZONTAL SCALE IN FEET 60 TPHg AND PCE IN GROUNDWATER LEGEND 668 EAST THIRD AVENUE SAN MATEO, CALIFORNIA 94401 PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-003 09/2020 DCB PGB FIGURE 3 Site Boundary Soil Vapor Probe Location 0 120Grab Groundwater Sampling Location SVP-01 SB-01 SOURCE: GOOGLE EARTH, 2020 Total Petroleum Hydrocarbons as Gasoline The Same Analyte Is Found in the Associated Blank Micrograms per Liter Concentration in µg/L TPHg Bµg/L 122 7/28/20 TPHg 122 J,B PCE <1.00 Inferred Groundwater Gradient Direction (DRY) J Estimated Value N Notes: 1) Yellow shaded values exceed the Tier 1 Environmental Screening Level (ESL). 2) Where primary and duplicate samples collected, the highest value is shown. SS Sanitary Sewer 9/8/20 TPHg <100 PCE 3.16 7/28/20 TPHg 180 J,B PCE <1.00 PCE Tetrachloroethene 7750 of 11211 SVP-01 SB-01 SB-02 SOUTH RAILROAD AVENUE SB-03 SVP-03EAST 5TH AVENUE SOUTH B STREET EAST 4TH AVENUE 445 SOUTH B ST 415 SOUTH B ST SVP-07 SVP-04 SB-04 SVP-02 SVP-06 SVP-05 SS SS SS SS SS SS SS HORIZONTAL SCALE IN FEET 60 TPHg, BENZENE, AND PCE IN SOIL VAPORLEGEND 668 EAST THIRD AVENUE SAN MATEO, CALIFORNIA 94401 PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-003 09/2020 DCB PGB FIGURE 4 Site Boundary Soil Vapor Probe Location 0 120Grab Groundwater Sampling Location SVP-01 SB-01 SOURCE: GOOGLE EARTH, 2020 Total Petroleum Hydrocarbons as Gasoline Tetrachloroethene Micrograms per Cubic Meter Concentration in µg/m³ TPHg PCE µg/m³ 2.30 Depth TPHg Benzene PCE 3.5 (9/10/20) <826 <0.639 172 6.5 (7/29/20) <826 J4 <0.805 31.3 7/29/20 Depth TPHg Benzene PCE 4.5 <826 J4 1.60 2.68 7.5 <826 J4 1.04 2.30 7/29/20 Depth TPHg Benzene PCE 3.5 1,030 2.24 1.41 6.5 <826 2.66 <1.36 N Inferred Groundwater Gradient Direction The Associated Batch QC Was Outside the Established Quality Control Range for Accuracy J4 Notes: 1) Yellow shaded values exceed the Tier 1 Environmental Screening Level (ESL). 2) Where primary and duplicate samples collected, the highest value is shown. 3) Sample depth is shown in feet below ground surface (Ft bgs). SS Sanitary Sewer 9/10/20 Depth TPHg Benzene PCE 4.5 1,850 3.04 747 9/10/20 Depth TPHg Benzene PCE 4.5 3,110 10.9 2,620 9/10/20 Depth TPHg Benzene PCE 4.5 2,360 24.2 801 9/10/20 Depth TPHg Benzene PCE 4.5 6,900 10.6 6.25 7751 of 11211 1371 OAKLAND BOULEVARD, SUITE 200 – WALNUT CREEK, CA
April 27, 2022
Mr. Massimo Kaz
Prometheus Real Estate Group
1900 South Norfolk Street, Suite 150
San Mateo, California 94403

Subject: Phase II Site Investigation Report - DRAFT
East 4th Avenue and South Railroad Avenue, San Mateo, California Dear Mr. Kaz:

RMD Environmental Solutions, Inc., (RMD) has prepared this Phase II Site Investigation Report (Phase II Report) describing recent Phase II Environmental Site Investigation (Phase II) activities for the property located at East 4th Avenue and South Railroad Avenue (Site) in San Mateo, California (the Site; Figure 1).

SITE BACKGROUND
The Subject Property consists of one parcel totaling approximately 11,000 square feet and is located south of the intersection of East 4th Avenue and South Railroad Avenue in San Mateo, California. The Subject Property is identified as San Mateo County Assessor’s Parcel Number (APN) 034-179-050 and is currently developed with a parking lot with no address. Details regarding the Site operations, ownership, and improvements are included in the Phase I Environmental Site Assessment (ESA) report, prepared concurrently. A Site Plan is provided as Figure 2.

A figure showing current and historic property uses in the site vicinity is provided as Figure 3.

Current and former uses for nearby properties include: a current dry cleaning operation at 335 East 4th Avenue (up/cross gradient [San Mateo County Environmental Health Services Case #11902/RO2293]), a historic auto service station at 401 South B Street (up gradient), and a historic dry cleaner at 411 South B Street (up/cross gradient). A Phase II Investigation completed at adjacent properties 415 and 465 South B Street (Talbot) was performed by RMD in 2020.

Results of that investigation were considered and incorporated into this report as relevant. 7752 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

Based on our understanding, plans are to redevelop the property into a 60-unit residential development. The entire footprint of the property will be excavated to approximately 15 to 17 feet below ground surface (bgs) to accommodate a subterranean garage.

SCOPE OF WORK
The Phase II activities were completed in March and April 2022. The scope of work conducted consisted of a combination of on-Site soil, groundwater, and soil vapor sampling, summarized as follows:
• Soil sampling from four borings (B-1 through B-4) advanced to approximately 34 feet bgs.

Data was collected to evaluate shallow soil conditions to prepare for soil management during anticipated excavation required for the subterranean parking structure. • Groundwater sampling from four borings (B-1 through B-4) to evaluate potential impacts in groundwater beneath the Subject Property.
• Soil vapor sampling from four soil vapor probes (SVP-1 through SVP-4) to evaluate soil vapor concentrations and potential vapor intrusion concerns associated with volatile organic compounds.

Drilling activities were conducted by Gregg Drilling, Inc. (Gregg), a C-57 licensed contractor, under the oversight of RMD personnel. All work was performed under direction of an RMD, California-licensed geologist. Approximate boring locations are shown on the attached Figure 2.

PRE-FIELD ACTIVITIES
Prior to initiating field work, RMD performed the following pre-field activities:
• Marked the proposed sampling locations for Underground Service Alert (USA); • Updated the Site-specific Health and Safety Plan (HASP) with task-specific job safety analysis (JSA) forms;
• Obtained a drilling permit from San Mateo County Department of Environmental Health.

A copy of the permit is included in Attachment A.
• Conducted an underground utility survey to clear the proposed drilling locations of underground utilities and other possible subsurface obstructions. Underground utilities identified during the survey are included in Figure 2.
7753 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

SOIL BORINGS AND LOGGING
Four soil borings (B-1 through B-4) were hand cleared to 5 feet below ground surface (feet bgs) and advanced with a direct-push drill rig to a final depth of 34 feet bgs. During hand augering and soil coring at each borehole, soil was visually characterized and described using the Unified Soil Classification System (USCS). Soil samples were field screened for total volatile organic compounds (VOCs) using a handheld photoionization detector (PID).

Between approximately 1 feet bgs to 8 feet bgs, the soil was characterized primarily by a silt and sandy silt. The soil beneath this horizon is characterized by sand and and/or gravel soil to approximately 16 feet bgs. The soil below 16 feet bgs and the deepest terminal depth of 34 feet bgs is characterized primarily by clay with sand and/or gravel. Groundwater was first encountered in the borings between 28 feet bgs and 30 feet bgs and stabilized between 22 and 24 feet bgs.

No odors or significantly elevated PID readings were observed during drilling at any of the borings. The soil types and PID readings are recorded on the boring logs included as Appendix B.

SOIL SAMPLING
Soil samples were collected at borings B-1 through B-4 location during hand augering and direct-push drilling activities. Soil samples were collected at approximately 1 foot bgs, 5 feet bgs, 10 feet bgs, and 15 feet bgs. Samples were collected in laboratory-supplied sample containers, labeled, placed in a chilled cooler, and transported under standard chain-of-custody (COC) protocol to Pace Analytical (Pace), a State-certified laboratory, for analysis.

Soil samples from 1, 5, 10, and 15 feet bgs were analyzed for total petroleum hydrocarbons (TPH) as gasoline (TPHg), TPH as diesel (TPHd), TPH as motor oil (TPHmo) using USEPA Method 8015B, and volatile organic compounds (VOCs) using USEPA Method 8260B. Soil samples collected from 1 and 5 feet bgs were analyzed for California Administrative Manual (CAM)-17 metals using USEPA Method 6010B.

GRAB GROUNDWATER SAMPLING
Once each boring (B-1 though B-4) reached the target depth, temporary PVC casing with 5 feet of 0.010-inch machined-slot screen was installed to facilitate grab groundwater sample collection.

Grab groundwater samples were collected using a disposable bailer directly into laboratory-supplied sample containers. Samples were labeled, placed in a chilled cooler, and 7754 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
transported under standard COC protocol to Pace for analysis for TPHg, TPHd, and TPHmo using USEPA Method 8015 and VOCs using USEPA Method 8260B.

Following groundwater sample collection, all borings were backfilled with neat cement grout to approximately 1-foot bgs, with dry granular bentonite from 1 to 0.5 feet bgs to and the surface was patched to match surrounding surfaces.

SOIL VAPOR PROBE INSTALLATION
Soil vapor probes SVP-1 through SVP-4 were installed at approximately 14.5 feet bgs. Soil vapor probes were installed in accordance with the methods and procedures outlined in the Advisory – Active Soil Gas Investigations (Advisory)1
. The soil vapor probes were constructed using ¼-inch
diameter Teflon™ tubing, fitted with a vapor probe implant installed at the target depth with a three-way valve at the surface. The annulus surrounding the implant was filled with #2/12 Monterey sand to six inches above and below the implant, followed by a one-foot layer of dry granulated bentonite, and hydrated bentonite chips to near ground surface. A traffic-rated flushmount vault box was installed at the surface of each location for protection. Soil vapor probe construction details are provided in Table 1 and in the logs included in Attachment B.

SOIL VAPOR PROBE SAMPLING
Soil vapor probes were sampled on April 8, 2022 in accordance with the Advisory. At each sampling point a shut-in test was conducted and a total of three system volumes were removed prior to sampling. A helium shroud was used to conduct a leak test at each sampling point. An average of 19.02 to 20.88 percent (%) helium was monitored and maintained under the helium shroud during sample collection. Soil vapor samples were collected from each location in 1-liter SUMMATM canisters, labeled, handled under standard COC protocols, and transported to Pace for analysis. The samples were analyzed for TPHg and VOCs using USEPA Method TO-15, and helium using modified American Society for Testing and Materials (ASTM) Method D-1946. Field data sheets are provided in Appendix C.

INVESTIGATION RESULTS
SOIL
Soil analytical results are summarized in Tables 2 and 3. Data compared to the San Francisco Bay Regional Water Quality Control Board’s (SFBRWQCB) Tier 1 Environmental Screening Levels 1 Department of Toxic Substances Control, Los Angeles Regional Water Quality Control Board, and San Francisco Regional Water Quality Control Board (CalEPA). 2015. Advisory – Active Soil Gas Investigations. July. 7755 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
(ESLs)2 and Direct Exposure Human Health Risk Levels for Residential Shallow Soil Exposure (Residential ESLs). ESL values are included on Tables 2 and 3 and discussed below. • Naphthalene was reported above the Tier 1 ESL of 0.04 milligrams per kilogram (mg/kg) in boring B-4 in the sample collected at 1-foot bgs at a concentration of 0.0489 mg/kg.

No other samples contained Naphthalene at concentrations above the ESLs. • Tetrachloroethylene (PCE) was reported above the Tier 1 ESL of 0.08 mg/kg in boring B-4 in the samples collected at 1 and 10 feet bgs at concentrations of 0.301 mg/kg and

0.114 mg/kg, respectively.
• No other VOCs were reported above their respective ESLs in any of the soil samples collected.

Metal concentrations are presented in Table 3. Metals with reported concentrations above Tier 1 ESLs and above the Bay Area Background Levels (Background Levels)3 are summarized as follows:
• Arsenic was detected above the Tier 1 ESL of 0.067 mg/kg and the Background Level of 11 mg/kg in three of the eight samples analyzed at concentrations up to 57.9 mg/kg in the samples collected at 1 foot bgs at borings B-1, B-2, and B-4. The sample collected from boring B-3 at 1 foot bgs and each of the samples collected at 5 feet bgs reported concentrations above the Tier 1 ESL, but below the Background Level. • Barium was detected above the Tier 1 ESL of 390 mg/kg and above the Bay Area Background Level of 410 mg/kg in one of the eight samples at a concentration of 489 mg/kg in the sample collected from boring B-1 at 1 foot bgs. The Tier 1 ESL is based on terrestrial habitat which is not applicable for the site. Barium concentrations reported in each of the samples were well below the residential ESL of 15,000 mg/kg. • Lead was detected above the Tier 1 ESL (based on terrestrial habitat) of 32 mg/kg in five of the eight samples analyzed. Lead was detected above the residential ESL of 80 mg/kg in three of the eight samples analyzed at concentrations of 94.3 mg/kg (B-4 at 1 foot bgs), 144 mg/kg (B-2 at 1 foot bgs), and 447 mg/kg (B-1 at 1 foot bgs). 2 San Francisco Bay Regional Water Quality Control Board. 2009. Tier 1 Environmental Screening Levels. 2019 Interim Final Rev. 2.
3 Lawrence Berkeley National Laboratory. 2009. Analysis of Background Distributions of Metals in Soil at Lawrence Berkeley National Laboratory, Table 5. Revised April. For arsenic, the background concentration was based on Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Region (Duvergé, 2011). 7756 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
• Vanadium was detected above the Tier 1 ESL of 18 mg/kg, but below the Background Level of 90 mg/kg, at each of the samples analyzed.
• Zinc was detected above the Tier 1 ESL of 340 mg/kg in one of the eight samples at a concentration of 443 mg/kg in boring B-1 at 1 foot bgs. The Tier 1 ESL is based on terrestrial habitat which is not applicable for the site. The zinc concentrations reported in each of the samples were well below the residential ESL of 23,000 mg/kg. • No additional metals were detected above the Tier 1 ESLs and Background Levels in the analyzed soil samples.

Based on the sample results, the soluble threshold limit concentration (STLC) extraction tests were performed on select samples. STLC tests were performed as follows:
• Arsenic on sample B-1-1’;
• Chromium on composite samples 3 and 4 (defined on Table 3); and • Lead on sample B-4-1’ and composite sample 1 (defined on Table 3). In addition, the toxicity characteristic leaching procedure (TCLP) extraction test was performed for lead on composite sample 2.

Results for STLC and TCLP tests are included on Table 3. Results for each of these samples indicate non-hazardous classification for soil disposal.

Laboratory analytical reports are included in Appendix C.

GROUNDWATER
TPHg, TPHd, TPHmo, and VOC concentrations were compared to Maximum Contaminant Levels (MCLs), Tier 1 ESLs, and Vapor Intrusion ESLs (VI ESLs). Analytes which exceeded screening levels in at least one sample are summarized as follows:
• TPHd was reported above the Tier 1 ESL of 100 micrograms per liter (µg/L) in three of four samples analyzed and above the MCL of 200 µg/L in two of four samples analyzed.

TPHd concentrations were 147 µg/L at boring B-3, 209 µg/L at boring B-2, and 520 µg/L at boring B-4.
• Chloroform was reported above the Residential VI ESL of 0.81 µg/L, but below the MCL of 80 µg/L in each of the four samples analyzed. Chloroform concentrations were

1.84 µg/L at boring B-4, 3.31 µg/L at boring B-3, 3.43 µg/L at boring B-2, and 4.15 µg/L at boring B-1.
7757 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
• PCE was reported above the Residential VI ESL of 0.64 µg/L in one sample, but below the MCL of 5 µg/L in each of the four samples. PCE was reported at a concentration of

4.57 µg/L at boring B-2.

Table 4 and Figure 3 summarize the grab groundwater analytical results. Figure 3 also includes data collected in 2020 at the adjacent Talbot property for reference. The laboratory analytical report is included in Appendix C.

SOIL VAPOR
TPHg and VOC constituents were compared to Residential VI ESLs. Analytes which exceeded screening levels in at least one sample are summarized as follows:
• Benzene was detected above the Residential VI ESL of 3.2 micrograms per cubic meter (µg/m3
) in two of the four samples at concentrations of 4.79 µg/m3 at SVP-3 and

9.07 µg/m3 at SVP-2.
• Chloroform was detected above the Residential VI ESL of 4.1 µg/m3 in one of the four samples at a concentration of 11.4 µg/m3 at SVP-2.
• PCE was detected above the Residential VI ESL of 15 µg/m3 in three of the four samples at concentrations of 38 µg/m3 at SVP-4, 502 µg/m3 at SVP-3, and 4,180 µg/m3 at SVP-2. • TCE was detected above the Residential VI ESL of 16 µg/m3 in one of the four samples at a concentration of 424 µg/m3 at SVP-2.

Other VOCs were detected above laboratory reporting limits but were either below the Residential VI ESLs, and/or there is no established ESL and are not considered drivers for future investigation or remediation.

Tables 5 through 7 and Figures 4 and 5 summarize the soil vapor analytical results. Figures 4 and 5 also include 2020 data collected at the adjacent Talbots property for reference. Laboratory analytical reports are included in Appendix C.

Quality Assurance/Quality Control Sampling
Helium was used as a leak check compound for collection of the soil vapor samples for analysis of TPHg and VOCs by USEPA Method TO-15. Helium was detected above laboratory reporting limits in one of the four soil vapor samples collected (Table 7). A ratio of the concentration of helium measured in the sample to the average concentration of helium under the shroud during sample collection was calculated to be 0.93% at SVP-3. A leak threshold of 5% is considered acceptable when a quantitative leak check compound is used under the sampling shroud 7758 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
(CalEPA, 2015). The estimated helium leak ratios is below the threshold for the sample at SVP-3; therefore, the TO-15 data were considered valid and representative.

Laboratory analytical reports are included in Appendix C.

INVESTIGATION DERIVED WASTE MANAGEMENT
Investigation derived waste (IDW) consisted of soil cuttings. IDW was stored on-Site in properly labeled 55-gallon drums. Following waste characterization profiling, IDW will be disposed of in accordance with applicable laws and regulations.

DISCUSSION OF KEY RESULTS AND CONCLUSIONS
In summary, based on the sampling conducted and knowledge of historical surrounding areas:
• Shallow soil exported off-Site during Site grading is generally expected to meet acceptable criteria for non-hazardous waste characterization. • TPHd, chloroform, and PCE were present in groundwater at concentrations exceeding regulatory screening levels. However, reported concentrations are low and are not at levels that require further investigation or would trigger additional regulatory action. • VOC concentrations (specifically benzene, chloroform, PCE, and TCE) in soil vapor are above Residential VI ESLs. The distribution and concentrations observed do not suggest a significant on-Site release. The most notable VOC reported in soil vapor is PCE, which appears to be migrating from an upgradient source onto the northwest property corner.

As indicated on Figure 4, Wardrobe Cleaners is located across East 4th Avenue with reported concentrations of 300 µg/L in groundwater at the corner of East 4th and South Railroad Avenues. The concentrations of VOCs reported in soil vapor are not expected to drive further investigation, however, mitigation measures such as a vapor barrier may need to be implemented in building design and construction. 7759 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

CLOSING
If you have any questions or comments, please do not hesitate to contact Ms. Kirsten Duey at (925) 683-8177 or [email protected].

Sincerely,
RMD ENVIRONMENTAL SOLUTIONS, INC.

Kirsten Duey Benjamin McVeigh, P.G.

Principal Engineer Senior Geologist
ATTACHMENTS:

Figure 1 – Historical Surrounding Areas
Figure 2 – Site Plan
Figure 3 – TPHd and VOC Concentrations in Groundwater
Figure 4 – PCE and TCE Concentrations in Soil Vapor
Figure 5 – TPHg and Benzene Concentrations in Soil Vapor Table 1 – Soil Vapor Probe Construction Details
Table 2 – Summary of Soil Analytical Results – TPH and VOCs Table 3 – Summary of Soil Analytical Results – Metals
Table 4 – Summary of Grab Groundwater Analytical Results – TPHg and VOCs Table 5 – Summary of Soil Vapor Analytical Results – TPHg and VOCs Table 6 – Summary of Maximum Soil Vapor Concentrations – Other VOCs Table 7 – Summary of Soil Vapor Analytical Results – Fixed Gases Attachment A – Drilling Permit
Attachment B – Boring Logs
Attachment C – Field Data Sheets
Attachment D – Laboratory Analytical Reports
7760 of 11211
Mr. Kaz
April 27, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

LIMITATIONS
This document was prepared for the exclusive use of Prometheus for the express purpose of complying with a regulatory directive for environmental investigation or restoration. RMD has used professional judgment to present the findings and opinions of a scientific and technical nature. The opinions expressed are based on the conditions of the Site existing at the time of the field investigation, current regulatory requirements, and any specified assumptions. The presented findings and recommendations in this document are intended to be taken in their entirety to assist the Prometheus in applying their own professional judgment in making decisions related to the property. No warranty or guarantee, whether expressed or implied, is made with respect to the data or the reported findings, observations, conclusions, and recommendations.
7761 of 11211

FIGURES
7762 of 11211
SITE
SITE LOCATION MAP 4TH AND RAILROAD

SAN MATEO, CALIFORNIA
PROJECT NO. DATE DR.BY: APP. BY:
01-PRO-013 04/2022 EC GC SCALE: 1" = 2000'
0 2000 4000
Map Source:

USGS 7.5' Quadrangle, San Mateo, California, 2018
FIGURE
N
1 7763 of 11211
B-1 SOUTH RAILROAD AVENUE
EAST 5TH AVENUE

SOUTH B STREET
EAST 4TH AVENUE
E
E
E
E
E
E
E
E
C
E
E
E
E
E
E
E
E E E E E E B-3 B-4 B-2SVP-3 SVP-4 SS SS
SS
SS
401 SOUTH B ST (HISTORIC SERVICE STATION)
Inferred Groundwater Flow Direction SB-01 SB-04 SB-02 SVP-04 SVP-05 SVP-02 SVP-06 SVP-07 SVP-03 SVP-01 SVP-2 SVP-1 HORIZONTAL SCALE IN FEET 80 SITE PLANLEGEND EAST 4TH AVENUE AND SOUTH RAILROAD AVENUE SAN MATEO, CALIFORNIA PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-013 04/2022 EC GC FIGURE 2 Site Boundary Soil Vapor Sample Location Soil/Grab Groundwater Sample Location Soil Vapor Sample Location, Talbots Phase II (2020) Grab Groundwater Sample Location, Talbots Phase II (2020) Sanitary Sewer Communication Electric Unknown Utility 0 160 SOURCE: GOOGLE EARTH, 2020 N B-4 SVP-4 SS SS C C E E SB-01 SVP-01 7764 of 11211 B-1 SOUTH RAILROAD AVENUE
EAST 5TH AVENUE

SOUTH B STREET
EAST 4TH AVENUE B-3 B-4 B-2 401 SOUTH B ST (HISTORIC SERVICE STATION) Inferred Groundwater Flow Direction SB-01 SB-04 SB-02 HORIZONTAL SCALE IN FEET 80 TPHd AND VOC CONCENTRATIONS IN GROUNDWATER LEGEND EAST 4TH AVENUE AND SOUTH RAILROAD AVENUE SAN MATEO, CALIFORNIA PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-013 04/2022 EC GC FIGURE 3 Site Boundary Soil/Grab Groundwater Sample Location Grab Groundwater Sample Location, Talbots Phase II (2020) Total Petroleum Hydrocarbons as Diesel Tetrachloroethene Volatile Organic Compound Concentration Exceeds MCL Estimated Value Not Detected Above Listed Laboratory Reporting Limit Not Analyzed Micrograms per Liter Concentration in µg/L Maximum Contamination Levels for Drinking Water 0 160 SOURCE: GOOGLE EARTH, 2020 N B-4 TPHd PCE VOC J NDNA µg/L 520 MCL B-1 TPHd ND<100 PCE ND<1.00 Chloroform 4.15 B-2 TPHd 209 PCE 4.57 Chloroform 3.43 B-3 TPHd 147 PCE ND<0.500 Chloroform 3.31 B-4 TPHd 520 PCE ND<0.500 Chloroform 1.84 SB-01 SB-01 TPHd NA PCE ND<0.6 Chloroform 0.736 J SB-02 TPHd NA PCE ND<1.00 Chloroform 0.578 J SB-04 TPHd NA PCE 2.39 Chloroform 0.347 J 7765 of 11211

SOUTH RAILROAD AVENUE
EAST 5TH AVENUE

SOUTH B STREET
EAST 4TH AVENUE

E E E E E
E E
E
C

E E E E E E
E E
E
E E
E
E SVP-3 SVP-4
SS
SS
SS
SS
401 SOUTH B ST
(HISTORIC SERVICE STATION)
Inferred Groundwater Flow Direction SVP-04 SVP-05 SVP-02 SVP-06 SVP-07 SVP-03 SVP-01 SVP-2 1,000
100
10 SVP-1 Wardrobe Cleaners Site with 330 µg/L PCE reported in Groundwater at Corner of East 4th and South Railroad (See Note) HORIZONTAL SCALE IN FEET 80 PCE AND TCE CONCENTRATIONS IN SOIL VAPORLEGEND EAST 4TH AVENUE AND SOUTH RAILROAD AVENUE SAN MATEO, CALIFORNIA PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-013 04/2022 EC GC FIGURE 4 Site Boundary Soil Vapor Sample Location Soil Vapor Sample Location, Talbots Phase II (2020) Sanitary Sewer Communication Electric Unknown Utility Tetrachloroethene Trichloroethene Concentration Exceeds Residential ESL Not Detected Above Listed Laboratory Reporting Limit Environmental Screening Level Micrograms per Cubic Meter Concentration in µg/m³ Interpreted PCE Contour Interval at 14.5 ft. bgs Below Ground Surface Samples collected during 2020 Talbot's Investigation were from depths at 7.5 feet or less. Data is not contoured with deeper sample results from the Subject Site. 0 160 SOURCE: GOOGLE EARTH, 2020
N SVP-4 SS SS C C
E E PCE TCE ND ESL µg/m³
4,180
bgs* SVP-04 Depth PCE TCE 14.5 38 ND<1.07 SVP-01 Depth PCE TCE 14.5 3.76 ND<1.07 SVP-02 Depth PCE TCE 14.5 4,180 424 SVP-03 Depth PCE TCE 14.5 502 11.7 T-SVP-01 T-SVP-01 Depth PCE TCE 4.5 2.68 ND<1.07 7.5 2.30 3.33 T-SVP-04 Depth PCE TCE 4.5 747 11.7 T-SVP-03 Depth PCE TCE 3.5 1.41 ND<1.07 6.5 ND<1.36 ND<1.07 T-SVP-02 Depth PCE TCE 3.5 172 ND<1.07 6.5 31.3 ND<1.07 T-SVP-07 Depth PCE TCE 4.5 6.25 5.35T-SVP-06 Depth PCE TCE 4.5 801 ND<1.07 SVP-05 Depth PCE TCE 4.5 2,620 3.46 1,000Note: Results of Soil and Groundwater Sampling at Wardrobe Cleaners (CSS Environmental Services, Inc. January 13, 2022)
*
*
*
*
*
* 7766 of 11211

SOUTH RAILROAD AVENUE
EAST 5TH AVENUE

SOUTH B STREET
EAST 4TH AVENUE
E
E
E
E
E
E
E
E
C
E
E
E
E
E
E
E
E E E E E E SVP-3 SVP-4 SS
SS
SS
SS
401 SOUTH B ST (HISTORIC SERVICE STATION)
Inferred Groundwater Flow Direction SVP-04 SVP-05 SVP-02 SVP-06 SVP-07 SVP-03 SVP-01 SVP-2 SVP-1 HORIZONTAL SCALE IN FEET 80 TPHg AND BENZENE CONCENTRATIONS IN SOIL VAPORLEGEND EAST 4TH AVENUE AND SOUTH RAILROAD AVENUE SAN MATEO, CALIFORNIA PROJECT NO. DATE DR. BY: APP. BY: 01-PRO-013 04/2022 EC GC FIGURE 5 Site Boundary Soil Vapor Sample Location Soil Vapor Sample Location, Talbots Phase II (2020) Sanitary Sewer Communication Electric Unknown Utility Total Petroleum Hydrocarbons as Gasoline Concentration Exceeds Residential ESL Not Detected Above Listed Laboratory Reporting Limit Environmental Screening Level Micrograms per Cubic Meter Concentration in µg/m³ Laboratory Flag. Batch out of Quality Control Range 0 160 SOURCE: GOOGLE EARTH, 2020 N SVP-4 SS SS C C E E TPHg ND ESL µg/m³ 8,430 J4 SVP-04 Depth TPHg Benzene 14.5 ND<826 0.690 SVP-01 Depth TPHg Benzene 14.5 ND<826 1.43 SVP-02 Depth TPHg Benzene 14.5 8,430 9.07 SVP-03 Depth TPHg Benzene 14.5 1,120 4.79 T-SVP-01 T-SVP-01 Depth TPHg Benzene 4.5 1.60 7.5 1.04 T-SVP-04 Depth TPHg Benzene 4.5 1,850 3.04 T-SVP-03 Depth TPHg Benzene 3.5 1,030 2.24 6.5 ND<826 2.66 T-SVP-02 Depth TPHg Benzene 3.5 ND<826 ND<0.639 6.5 0.805 T-SVP-07 Depth TPHg Benzene 4.5 6,900 10.6T-SVP-06 Depth TPHg Benzene 4.5 2,360 24.2 T-SVP-05 Depth TPHg Benzene 4.5 3,110 10.9 7767 of 11211 TABLES
7768 of 11211
Table 1
Soil Vapor Probe Construction Details
East 4th Avenue and South Railroad Avenue,
San Mateo, California

Probe ID Date
Installed
Total Boring
Depth
(feet bgs)
Tubing
Diameter
(inches)
Probe Depth
(feet bgs)
Seal Interval
(feet bgs)
Sand Pack
Interval
(feet bgs)
SVP-1 3/30/2022 16 0.25 14.5 0.5 - 12.5 14 - 15.5
SVP-2 3/30/2022 16 0.25 14.5 0.5 - 12.5 14 - 15.5
SVP-3 3/30/2022 16 0.25 14.5 0.5 - 12.5 14 - 15.5
SVP-4 3/30/2022 16 0.25 14.5 0.5 - 12.5 14 - 15.5
Notes:
bgs = below ground surface.

Soil Vapor Probes
7769 of 11211
Table 2
Summary of Soil Analytical Results - TPH and VOCs
East 4th Avenue and South Railroad Avenue,
San Mateo, California

Sample
Depth TPHg TPHd TPHmo Benzene Toluene Ethylbenzene Total Xylenes Naphthalene PCE TCE cis-1,2-DCE Vinyl Chloride 2-Butanone (MEK) Other VOCs (feet bgs) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) 430 260 12,000 0.33 1,100 5.9 580 3.8 0.59 0.95 19 0.0083 27,000 Varies 2,000 1,200 180,000 1.4 5,300 26 2,500 17 2.7 6.1 85 0.2 200,000 Varies 100 260 1,600 0.025 3.2 0.43 2.1 0.040 0.08 0.085 0.19 0.0015 6.1 Varies 1 ND<2.83 50.8 347 0.0129 0.0400 ND<0.00283 0.0543 0.0352 0.00348 ND<0.00113 ND<0.00283 ND<0.00283 ND<0.113 p-Isopropyltoluene (0.00791), 1,2,4-TMB (0.0205), 1,2,3-TMB (0.0171)
5 ND<3.01 ND<4.41 21 ND<0.0012 ND<0.00602 ND<0.00301 0.00825 ND<0.0151 ND<0.00301 ND<0.00120 ND<0.00301 ND<0.00301 0.123 ND 10 ND<2.90 ND<4.28 ND<4.28 ND<0.00116 ND<0.00580 ND<0.00290 ND<0.00754 ND<0.0146 ND<0.00290 ND<0.00116 ND<0.00290 ND<0.00290 0.123 ND 15 ND<2.64 ND<4.11 ND<4.11 ND<0.00106 ND<0.00529 ND<0.00264 ND<0.00687 ND<0.0132 ND<0.00264 ND<0.00106 ND<0.00264 ND<0.00264 ND<106 ND 1 3.16 B 70.7 380 0.00402 0.0270 0.00542 0.0634 0.0385 0.301 0.00127 ND<0.00294 ND<0.00294 0.123 Isopropylbenzene (0.00337), MIBK (0.0351), 1,2,4-
TMB (0.0251), 1,2,3-TMB (0.0217), 1,3,5-TMB
(0.00786)
5 ND<3.00 ND<4.33 26 ND<0.00120 ND<0.00599 ND<0.00300 ND<0.00779 ND<0.0150 0.00650 ND<0.00120 ND<0.00300 ND<0.00300 0.124 ND 10 ND<3.50 ND<4.29 38.7 ND<0.00140 ND<0.00700 ND<0.00350 ND<0.00910 ND<0.0175 0.114 0.0157 ND<0.00350 ND<0.00350 0.183 ND 15 ND<3.21 ND<4.53 ND<4.53 ND<0.00128 ND<0.00642 ND<0.00321 ND<0.00834 ND<0.0160 0.0223 ND<0.00128 ND<0.00321 ND<0.00321 0.132 ND 1 ND<3.06 6.70 63.5 0.0144 0.0600 0.00502 0.0702 ND<0.0153 0.0473 ND<0.00122 ND<0.00306 ND<0.00306 ND<0.122 1,2,4-TMB (0.0118) 5 ND<3.01 ND<4.36 29.4 0.00746 0.0310 ND<0.00301 0.0308 ND<0.0151 0.00427 ND<0.00120 ND<0.00301 ND<0.00301 ND<0.120 ND 10 ND<3.07 ND<4.44 ND<4.44 ND<0.00123 ND<0.00613 ND<0.00307 ND<0.00797 ND<0.0153 0.0167 ND<0.00123 ND<0.00307 ND<0.00307 ND<0.123 ND 15 ND<2.86 ND<4.25 ND<4.25 ND<0.00114 ND<0.00571 ND<0.00286 ND<0.00743 ND<0.0143 0.00811 ND<0.00114 ND<0.00286 ND<0.00286 ND<0.114 ND 1 ND<3.02 ND<21.7 166.2 0.00325 0.0107 ND<0.00302 0.0453 0.0489 ND<0.00302 ND<0.00120 ND<0.00302 ND<0.00302 ND<0.120 1,2,4-TMB (0.0224 B), 1,2,3-TMB (0.0146), 1,3,5- TMB (0.00635)
5 ND<3.02 5.41 40.7 ND<0.00121 ND<0.00604 ND<0.00302 0.0126 ND<0.0151 ND<0.00302 ND<0.00121 ND<0.00302 ND<0.00302 ND<0.121 1,2,4-TMB (0.00645 B) 10 ND<3.07 ND<4.41 ND<4.41 ND<0.00123 ND<0.00614 ND<0.00307 ND<0.00798 ND<0.0154 0.0113 ND<0.00123 ND<0.00307 ND<0.00307 ND<0.123 ND 15 ND<2.76 ND<4.19 ND<4.19 ND<0.00110 ND<0.00552 ND<0.00276 ND<0.00718 ND<0.0138 ND<0.00276 ND<0.00110 ND<0.00276 ND<0.00276 ND<0.110 ND Notes:

Samples analyzed using USEPA Method 8260B. -- = Not analyzed. 1 Yellow shaded value exceeds the Tier 1 ESL. ND<0.010 = Not detected above the noted laboratory reporting limit.

Note 1 SFBRWQCB, Direct Exposure Human Health Risk Levels for Residential Shallow Soil Exposure, 2019 (Rev. 2). bgs = Below ground surface.

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2). mg/Kg = Milligrams per kilogram.

Note 3 Tier 1 SFBRWQCB Environmental Screening Levels. 2019 Interim Final (Rev. 2). TPHg = Total Petroleum Hydrocarbons Gasoline range (C5-C12) SFBRWQCB = San Francisco Bay Regional Water Quality Control Board. TPHd = Total Petroleum Hydrocarbons Diesel range (C12-C22) ESL = Environmental Screening Level. TPHmo = Total Petroleum Hydrocarbons Motor Oil range (C22-C40) B = The same analyte is found in the associated blank. VOCs = Volatile Organic Compounds.

J = Estimated value. PCE = Tetrachloroethene.

TMB = Trimethylbenzene. MIBK = 4-Methyl-2-pentanone
MEK = Methy Ethyl Ketone
Boring ID Date
Tier 1 ESLsNote 3
SFBRWQCB Residential ESLsNote 1
SFBRWQCB Commercial ESLsNote 2
B-4
3/29/2022
3/29/2022
B-1 3/30/2022
B-2 3/29/2022
B-3
7770 of 11211
Table 3
Summary of Soil Analytical Results - Metals
East 4th Avenue and South Railroad Avenue,
San Mateo, California

Sample
Depth Antimony Arsenic Arsenic - STLC Extraction
Barium Beryllium Cadmium Chromium
Chromium -
STLC
Extraction
Cobalt Copper Lead Lead - STLC
Extraction
Lead -TCLP
Extraction Mercury Molybdenum Nickel Selenium Silver Thallium Vanadium Note 6 Zinc (feet bgs) (mg/Kg) (mg/Kg) (µg/L) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (µg/L) (mg/Kg) (mg/Kg) (mg/Kg) (µg/L) (µg/L) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) 11 0.067 -- 15,000 16 78 NV -- 23 3,100 80 -- -- 13 390 820 390 390 0.78 390 23,000 160 0.31 -- 220,000 230 1,100 NV -- 350 47,000 320 -- -- 190 5,800 11,000 5,800 5,800 12 5,800 350,000 11 0.067 -- 390 5.0 1.9 160 Note 5 -- 23 180 32 -- -- 13 6.9 86 2.4 25 0.78 18 340 <6.0 11 Note 4 -- 410 1.0 5.6 120 -- 25 63 24 -- -- 0.42 4.8 272 4.9 2.9 10 90 140 150 50 -- 1,000 7.5 10 50 -- 800 250 50 -- -- 2 3,500 200 10 50 70 240 2,500 NV 100 -- 2,000 NV 20 100 -- NV NV 100 -- -- 4 NV NV 20 100 NV NV NV -- -- 5,000 -- -- -- -- 5,000 -- -- -- 5,000 5,000 -- -- -- -- -- -- -- -- 1 2.61 57.9 845 489 0.323 1.05 65.1 NA 9.75 105 447 NA NA 0.923 0.843 54.6 ND<2.13 ND<1.07 ND<2.13 61.9 443 5 ND<2.20 7.03 NA 179 0.410 ND<0.551 61.2 NA 14.9 25.8 33.2 NA NA 0.0980 ND<0.551 58.0 ND<2.20 ND<1.10 ND<2.20 66.8 82.8 1 ND<2.16 12.5 NA 213 0.308 0.647 49.0 NA 10.8 74.3 144 NA NA 0.599 0.603 51.3 ND<2.16 ND<1.08 ND<2.16 57.1 165 5 ND<2.17 2.77 NA 127 0.320 ND<0.541 54.2 NA 11.3 18.6 6.88 NA NA ND<0.0433 ND<0.541 50.0 ND<2.17 ND<1.08 ND<2.17 58.7 49.2 1 ND<2.16 4.76 NA 157 0.315 ND<0.540 53.2 NA 10.8 55.9 37.8 NA NA 0.867 ND<0.540 52.1 ND<2.16 ND<1.08 ND<2.16 57.5 107 5 ND<2.18 4.99 NA 119 0.413 ND<0.545 62.9 NA 12.9 22.8 9.99 NA NA 0.0603 ND<0.545 56.2 ND<2.18 ND<1.09 ND<2.18 65.5 55.9 1 ND<2.17 40.0 NA 135 0.259 ND<0.543 48.3 NA 9.02 42.8 94.3 2,760 NA 0.376 0.623 46.8 ND<2.17 ND<1.09 ND<2.17 65.9 125 5 ND<2.20 8.72 NA 104 0.503 ND<0.551 67.5 NA 13.0 24.8 13.4 NA NA 0.0665 ND<0.551 59.3 ND<2.20 ND<1.10 ND<2.20 68.4 57.9 -- NA NA NA NA NA NA NA NA NA NA NA 1,580 NA NA NA NA NA NA NA NA NA -- NA NA NA NA NA NA NA NA NA NA NA NA ND<100 NA NA NA NA NA NA NA NA -- NA NA NA NA NA NA NA 505 NA NA NA NA NA NA NA NA NA NA NA NA NA -- NA NA NA NA NA NA NA 145 NA NA NA NA NA NA NA NA NA NA NA NA NA Notes:

Samples analyzed using USEPA Method 6010. bgs = Below ground surface.

Italicized and emboldened values exceed the Residential ESL. SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

Green shaded values exceed the Tier 1 ESL however are less than the Bay Area Background Level. ESL = Environmental Screening Level.

Yellow shaded values exceed the Tier 1 ESL and the Bay Area Background Level. NV = No established value.

Values shown in red font exceed the threshold which triggers STLC analysis for waste characterization. NA = Not analyzed Values shown in blue font exceed the threshold which triggers TCLP analysis for waste characterization. <0.50 = Not detected above the noted laboratory reporting limit.

Note 1 SFBRWQCB, Direct Exposure Human Health Risk Levels for Residential Shallow Soil Exposure, 2019 (Rev. 2). mg/Kg = Milligrams per kilogram.

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2). µg/L = micrograms per liter.

Note 3 SFRWQCB Tier 1 Environmental Screening Levels. 2019 Interim Final Rev. 2. STLC = Soluble Threshold Limit Concentration.

TCLP = Toxicity Characteristic Leaching Procedure.

For arsenic, the background concentration was based on the document titled Establishing Background Arsenic in Soil of the Urbanized San Francisco Bay Area (Duverge, 2011) J = Estimated value.

Note 5 ESL value shown is for total chromium.

Note 6 Vanadium and Arsenic concentrations were compared to the published background values for soil in the Bay Area, instead of ESLs Note 7 Composite 1 is comprised of B-1-1’, B-2-1. Composite 2 is comprised of B-1-1’, B-2-1’, and B-3’1. Composite 3 is comprised of B-1-1' and B-3-1'. Composite 4 is comprised of B-1-5', B-2-5', B-3-5', and B-4-5'.

O1 = The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.

Note 4 Lawrence Berkeley National Laboratory, Analysis of Background Distributions of Metals in Soil at Lawrence Berkeley National Laboratory, Table 5. Revised April 2009.

Threshold to Require TCLP Analysis
STLC/TCLP Non-Hazardous Classification Limit
B-1 3/30/2022
B-2 3/29/2022
B-3 3/29/2022
B-4 3/29/2022
Composite 1 Note 7
Composite 2 Note 7
Composite 3 Note 7
Composite 4 Note 7
Boring ID Date
Tier 1 ESLs Note 3
Bay Area Background Metals in Soil Note 4
Threshold to Require STLC Analysis
SFBRWQCB Residential ESL Note 1
SFBRWQCB Commercial ESL Note 2
7771 of 11211
Table 4
Summary of Grab Groundwater Analytical Results - TPH and VOCs East 4th Avenue and South Railroad Avenue,
San Mateo, California

Sample Depth TPHg TPHdNote 4 TPHmoNote 5 Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE Chloroform PCE TCE cis-1,2-DCE Vinyl Chloride Other VOCs (feet bgs) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) 760 200 NV 1.0 40 30 20 0.17 5.0 80 5.0 5.0 6.0 0.5 NV
NV NV NV 1.8 4,900 15 1,600 4.6 2,000 3.6 2.8 7.5 210 0.14 NV NV NV NV 0.42 1,200 3.5 390 20 450 0.81 0.64 1.2 49 0.0086 NV 100
(O/N)
100
(O/N) NV

0.42 (VI)
40 (O/N)

3.5 (VI)
20 (O/N)

0.17 (MCL)

5.0 (O/N)

0.81 (VI)

0.64 (VI)

1.2 (VI)

6.0 (MCL)

0.0086
(VI) NV
B-1 24-34 3/30/2022 ND<100 ND<100 146 ND<1.00 ND<1.00 ND<1.00 ND<3.00 ND<5.00 ND<1.00 4.15 ND<1.00 ND<1.00 ND<1.00 ND<1.00 ND B-2 24-34 3/29/2022 ND<100 209 475 ND<0.500 ND<0.500 ND<0.500 ND<1.50 ND<2.50 ND<0.500 3.43 4.57 ND<0.500 1.07 ND<0.500 ND B-3 24-34 3/29/2022 ND<100 147 456 ND<0.500 ND<0.500 ND<0.500 ND<1.50 ND<2.50 ND<0.500 3.31 ND<0.500 ND<0.500 0.828 ND<0.500 ND B-4 24-34 3/29/2022 ND<100 520 1,654 ND<0.500 ND<0.500 ND<0.500 ND<1.50 ND<2.50 ND<0.500 1.84 ND<0.500 ND<0.500 ND<0.500 ND<0.500 ND Notes:

Yellow shaded values exceed the Tier 1 ESL.

MCLs = Maximum Contaminant Levels for drinking water.

SFRWQCB ESL = San Francisco Bay Regional Water Quality Control Board Environmental Screening Level. 2019 (Rev. 2).

Note 1 MCL Priority lists all allowable MCLs. If no MCLs are available, the lower of the cancer, non-cancer, or tap water direct exposure level is listed. Note 2 SFRWQCB ESL for groundwater vapor intrusion.

Note 3 Tier 1 SFBRWQCB Environmental Screening Levels. 2019 Interim Final (Rev. 2).

Note 4 TPHd data shown represents laboratory results for carbon range C12-C22 hydrocarbons.

Note 5 TPHmo data shown represents laboratory results for carbon range C22-C40 hydrocarbons.

VI = Vapor Intrusion.

AH = Aquatic Habitat.

O/N = Odor/Nuisance.

VOCs = Volatile Organic Compounds.

TPHg = Total Petroleum Hydrocarbons as gasoline.

TPHg = Total Petroleum Hydrocarbons as motor oil.

MTBE = Methyl tert butyl ether.

PCE = Tetrachloroethene.

TCE = Trichloroethene.

DCE = Dichloroethene.
µg/L = Micrograms per liter.
-- = Not analyzed.

ND<0.500 = Not detected above noted laboratory reporting limit.

J = Estimated value.

B = The same analyte is found in the associated blank.

References:

SFRWQCB. Environmental Screening Levels (ESLs). Revision 3. January 24, 2019.

MCL Priority Note 1
SFBRWQCB Vapor Intrusion ESLs Commercial Land UseNote 2 SFBRWQCB Vapor Intrusion ESLs Residential Land UseNote 2 Tier 1 ESL Note 3
(Basis)
Boring ID Date Sampled
7772 of 11211
Table 5
Summary of Soil Vapor Analytical Results - TPHg and VOCs East 4th Avenue and South Railroad Avenue,
San Mateo, California

Sample
Depth TPHg Benzene Toluene Ethylbenzene Total Xylenes Chloroform PCE TCE cis-1,2-DCE trans-1,2-DCE (ft bgs) (µg/m3
) (µg/m3) (µg/m3) (µg/m3) (µg/m3) (µg/m3) (µg/m3) (µg/m3) (µg/m3) (µg/m3) 20,000 3.2 10,000 37 3,500 4.1 15 16 280 2,800
83,000 14 44,000 160 15,000 18 67 100 1,200 12,000
SVP-1 14.5 4/8/2022 ND<826 1.43 6.44 1.74 8.62 2.21 3.76 ND<1.07 ND<0.793 ND<0.793 SVP-2 14.5 4/8/2022 8,430 9.07 29.5 10.0 47.3 11.4 4,180 424 39.2 2.05 SVP-3 14.5 4/8/2022 1,120 4.79 11.8 4.86 27.41 ND<0.973 502 11.7 ND<0.793 ND<0.793 SVP-4 14.5 4/8/2022 ND<826 0.690 1.96 ND<0.867 2.02 ND<0.973 38.0 ND<1.07 ND<0.793 ND<0.793 Notes:

Blue shaded values exceed the Residential ESL.

Note 1 SFBRWQCB, Subslab/Soil Gas Human Health Risk Screening Levels for Commercial Exposure, 2019 (Rev. 2).

Note 2 SFBRWQCB, Subslab/Soil Gas Human Health Risk Screening Levels for Residential Exposure, 2019 (Rev. 2). ft bgs = Feet below ground surface.
µg/m3 = Micrograms per cubic meter.

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level.

ND<1.07 = Not detected above the noted laboratory reporting limit.

TPHg = Total Petroleum Hydrocarbons as Gasoline.

VOCs = Volatile organic compounds.

PCE = Tetrachloroethene.

TCE = Trichloroethene.

DCE = Dichloroethene.

Sample ID Date
Sampled
SFBRWQCB Commercial ESLs Note 2
SFBRWQCB Residential ESLs Note 1
7773 of 11211
Table 6
Summary of Maximum Soil Vapor Concentrations - Other VOCs East 4th Avenue and South Railroad Avenue,
San Mateo, California

RMD ENVIRONMENTAL SOLUTIONS, INC.
(µg/m 3 ) (µg/m 3 )

45.4 1,000,000

8.26 170,000

17.4 --

0.760 3,100

2.78 --

40.9 --

3.01 --

1.28 --

2.84 --

8.26 --

3.91 --

0.917 34

3.39 --

8.44 --

2.51 --

9.94 --

3.12 35,000
Notes:

Note 1 SFBRWQCB Tier 1 Environmental Screening Levels. 2019 Interim Final (Rev. 2). -- = No published value.

VOCs = Volatile Organic Compounds.
µg/m3 = Micrograms per cubic meter.

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level.

Propene
Acetone
4-Ethyltoluene
2-Butanone (MEK)
1,1,1-Trichloroethane
Isopropyl alcohol/2-Propanol
Ethanol
1,2,4-Trimethylbenzene
1,3,5-Trimethylbenzene
Methylene chloride
Tier 1 ESLs Note 1
Trichlorofluoromethane (Freon 11)
Dichlorodifluoromethane (Freon 12)
Heptane
n-Hexane
Maximum Detected
Analyte Concentration
Carbon disulfide
Cyclohexane
Chloromethane
7774 of 11211
Table 7
Summary of Soil Vapor Analytical Results - Fixed Gases
East 4th Avenue and South Railroad Avenue,
San Mateo, California

Sample ID
Sample
Depth
(feet bgs)
Sample
Date
Helium in Sample
(%)
Average Helium
Under Shroud
(%)
Leak RatioNote 1
(%)
Carbon
Monoxide
(%)
Carbon
Dioxide
(%)
Methane
(%)
Oxygen
(%)
SVP-1 14.5 4/8/2022 ND<0.100 20.08 -- ND<2.00 ND<0.500 ND<0.400 20.9 SVP-2 14.5 4/8/2022 ND<0.100 19.60 -- ND<2.00 1.05 ND<0.400 19.7 SVP-3 14.5 4/8/2022 0.177 19.02 0.93 ND<2.00 2.16 ND<0.400 19.1 SVP-4 14.5 4/8/2022 ND<0.100 20.88 -- ND<2.00 1.61 ND<0.400 19.7 Notes:

Note 1Estimated leak ratio (%) = [Concentration of Helium in Sample (%)] / [Concentration of Helium in Shroud (%)] X100. bgs = Below ground surface.

NA = Not analyzed.
% = Percent.

ND<0.100 = Not detected above the noted laboratory reporting limit. -- = Not calculated, helium not detected in sample.

Soil Vapor Probes
7775 of 11211

APPENDIX A
Drilling Permit
7776 of 11211
ORDINANCE: 04023
CONTRACTOR:

GREGG DRILLING
DATE ISSUED: 3/29/2022
, . ;..~ . SAN MATEO COUNTY HEALTH
1i J.i 1; ENVIRONMENTAL
y ....
~!i} HEALTH SERVICES
P/E:

PERMIT 22-0495

AL ESTATE GROUP
ST STE 150

KIAN ATKINSON

ENVIRONMENTAL HEALTH SPECIALIST
EXPIRATION DATE: 7/29/2022
THIS CERTIFICATE 15 NONTRANSFERABLE AND MUST BE POSTED ON-SITE IN A CONSPICUOUS PLACE. 7777 of 11211
DocuSign Envelope ID: EF88FCF7-343B-424A-BD55-207953E1 E96A

SAN MATEO COUNTY HEALTH
~ VI!A orP
vAf
Environmental Health Services
Groundwater Protection Program
2000 Alameda de las P~~· it,A'f~(j'cOUNTY San Mateo, CA 94403 Phone: (650) 372-6~\MQM,\li~HJ-tEALTH
smchealth.org/gpp
SUBSURFACE DRILLING PERMIT APPLICATION MAR 2 8 2022
Allow three (3) full working days for processing a complete permit application which includes payment (one permit per parcel). Drilling start data & time must be scheduled with County staff at (650) 464-0047 or .dri!ling@~rru;g_oy.,_o_m at least 2 full working days (i.e. 48 hours In D Visit §!!1g1Jil.a.l!!M~~ for Groundwater Protection Program fees.

PURPOSE OF rR] Groundwater MonitoringNapor Well Installation 18] Construct Soil Borings (variance request if to be left open >24 hrs) APPLICATION O Groundwater MonitoringNapor Well Destruction Extension of Permit# No. ofWells4 No. of Borings HJ Well/Boring Names svP-1 - -, svP---- -2, svP-3, SVP-4 ---, 0-1, ---- 0-2, B-3, B-4
PURPOSE OF rR] Environmental LEAD O County GPP (permit approval is not to be considered work plan approval) DRILLING O Geotechnical AGENCY O RWQCB/DTSC/USEPA (Provide approval letter) rRJ None (i.e. voluntary) Agency Case# Assesso(s Parcel# (required) 034179050 (one per permit) -:-:-:----;::::::=====-------------.....:...._:__..:..:::~.;...;;..;;..;;...;;... _____ _ Drilling Location Address: !East 4th Ave and South Railroad Ave Parking Lot I City: San Mateo Zip: 94401 To Be Constructed In: rR] Public Property O Private Property D Refuse Maximum Proposed Depth (wells/borings) 35 ft bgs (feet) Drilling Method: Direct Push --~---------- --------- Boring Diameter: 3.25 inches Casing Diameter:N/A Filter Pack lnterval:N/A Screen Interval: 17-18 ft bgs Destruction Method: 0 Pressure Grouting (provide well construction logs and grout calcs) (6 gallons water max/94 lb cement, up to 5% bentonite) D Overdrilling (guide rods for total d prior to starting required) Name: Prometheus Real Estate Group
Address:1900 South Norfolk Street, Suite 150
Contact Person:""D""' o'""n..;.P...cec.cte=r-=s-=- o'--'-n ___________ _ City, State, Zip:San Mateo, CA, 94403
Telephone: 650-931-3538 Email: [email protected] It is my responsibility to notify the County of any known changes in the purpose of this well/boring from that which is indicated on this application, to submit indication of annual usage of well and to maintain the well in good condition. (Letter signed by we/Vboring owner/contact person, containing above language and attas~ ~ JJl all permit requirements and conditions, may O. subtlltuted for ~nature.) Well/Boring Owners/Contact Person's Signature: V0"" r~ Date: 3/ 2212022 Name: City of San Mateo Contact Person: Kathy Kleinbaum ----------------- Address:330 W 20th Avenue City, State, Zip:-'-S=a_n ...... M""a-'-te'--o..._, ""'C_A.._, 94"--4 ...... 0-'-3 _ ______ _ Phone: 650-522-· 7153 Email: [email protected] I understand that a well/boring is being installed on my property. I agree to notify the County and Well Owner of any known damage or future access issues to the well (Letter signed by property owner, containing above language, or encroachment permit may be substituted for signature) Property Owner's Signature: Date:

Drilling Company: Gregg Drilling Contact Person:'-R""y.::.an'-'--=L-=- ea;::c_ ____________ _ Address:950 Howe Road City, State, Zip:_M_a_rt_in_e_z~, C_A_, 94_ 5_5_3 ________ _ Phone: (925) 313-5800 Email: [email protected] C57 Drillers License# ______ _ I certify that the welVboring will be constructed in compliance with the conditions of this permit (see reverse), the San Mateo County Well Ordinance, and the State Water Well Standards, and that the license listed above Is considered current and active by the Contractors State License Board.

Drillel's Signature: Date: 3/21flQ22
Consultant Company: RMD Environmental Solutions, Inc.

Address:1371 Oakland Blvd., Ste 200.

Telephone: 925-683-8177
Project Manager: _K_irs_t_e_n_D_u_e~y ___________ _
City, State, Zip:Walnut Creek, CA., 94596
Email: [email protected]
Field Contact & Cell# (if known): ""' G""'lea.a.n.;..;.n'""C=a=rr.;....L'- (7-=2 .... 4.._) 4-"22 =--2=9=3"-'1'"--- ------------------ --- 1 certify that this application is correct to the best of my knowledge and the well/boring will be constructed/destroyed in compliance with the conditions of this permit (see page 2), the San Mateo County Well Ordinance, and the State Water Well Standards. I understand that I am responsible for General Conditions E, F, K, and L of this permit and if I indicated the purpose of drilling is geotechnical, then no one will use the boring to collect any samples for environmental analyses. If there is a change in Responsible Professional, I will notify San Mateo County GPP staff.

Responsible Professional's Name (Please print legibly): ___ B __ e_n~ja_lTll _·n_ M_c_V __ e_ig~h _________________ _ Responsible Professional's Signature: Date: 3/21/2022
Ca Ii f om i a Professional Geologist (PG) -------- No. ------ or Civil -------- Engineer (PE) No. Page 2 of s Rev. 1/19/2021 7778 of 11211
'
I
·~ SAN MATEO COUNTY HEALTH
. i•~1 ENVIRONMENTAL
• ~~) HEALTH SERVICES
Environmental Health Services
Groundwater Protection Program
2000 Alameda de las Pulgas, Suite #100
San Mateo, CA 94403
Phone: (650) 372-6200 I Fax: (650) 627-8244
smchealth.org/gpp

SUBSURFACE DRILLING PERMIT APPLICATION CHECKLIST

CHECKLIST
D Legibly filled in all appropriate blanks and boxes, except signature and date (review instructions to verify appropriate fields to leave any lines blank or unchecked).

D Have all required signatures (can be on separate pages, do not need to be wet signatures).

D Include appropriate fee with application. Payment can be made by credit card over phone to (650) 372-6200 (indicate when and how application submitted).

D Include scaled site map of site in relation to cross streets and drilling location in relation to site features. > D Show approximate location(s) and ID/Name of well/borings.

D For well installations, indicate (i.e. mark on permit application) anticipated destruction method of these wells.

May be asked to provide written description for small diameter (<2") wells.

D For well destructions via pressure grouting, included well construction logs and grout volume calculations.

An approved work plan is required for all well destructions.

Shallow (<10') vapor wells do not need to be permitted. However, still must comply with well standards for D installation and destruction (i.e. do not use bentonite alone in vadose zone for sanitary seal and remove all nonnative material).

D Notify permitting inspector 2 full working days prior to start of drilling.

Separate notification to case worker if known contaminated site.

D Consultant must submit all required information within 60 days of drilling (preferably to [email protected]).

D For Borings and wells: require logs, site map, and analytical data.

D For wells: require surveyed coordinates and elevation, Well Completion Report (or indicate upload to Department of Water Resources Online System of Well Completion Reports DWR's OSWCR).

COMMON MISTAKES TO AVOID ON APPLICATION
Listed potential buyer as Property Owner,
Listed case's address rather than drilling location's address.

Failed to include Assessor's Parcel Number of the drilling location. - Provided variance justification memo if temporary wells/borings may need to be left open for more than 24 hours to wait for groundwater recharge with estimate of maximum time needed. - Permit is for one mobilization only. If work included in this permit cannot be done in a single mobilization, another permit may be required.
- Well owner must submit indication of annual use of wells (monitoring reports in association with corrective action requests satisfies this requirement); otherwise, wells need to be destroyed within year of last originally intended use.
- Any application for drilling within a landfill (geotechnical or environmental) must be accompanied by a work plan.

Work plans must be approved by San Mateo County Environmental Health Services (EHS) and the Groundwater Protection Program prior to drilling.

Rev.111 912021 SMC Ordinance Title 4, Ch 4.68.080 Page 1 of 5 7779 of 11211
'

SUBSURFACE DRILLING PERMIT APPLICATION

REQUIREMENTS
An accurate and correct map must be submitted with the application and include the following: north arrow, existing and historic site features, existing and proposed well/boring locations with ID's to scale, property lines and any other pertinent information. A work plan describing the drilling and construction/destruction methodology must be submitted to County staff.

A complete application with appropriate fees must be submitted 3 working days in advance of drilling and notification of start date and time must be provided at least 2 working days prior to drilling. The permit is subject to both General and Special Conditions stated below. A copy of the approved Subsurface Drilling Permit must be available on site while work related to the permit is being performed. Drilling may begin at the notified date and time whether County staff is present or not

GENERAL CONDITIONS
A. Field notification must be provided to GPP drilling inspection staff at least 2 full working days prior to the start of drilling. GPP Caseworker also must be notified if site is associated with a remedial action case.

B. Well and boring construction and destruction under this permit are subject to the Standards for the Construction of Wells in San Mateo County, County Groundwater Protection Program (GPP) Guidelines, Policies & Procedures, the State Water Well Standards, and any instructions by EHS representative.

C. Well/Boring Owner, Driller, and Responsible Professional assume responsibility for all activities and uses under the permit, including compliance with Workmen's Compensation Laws, and indemnify, defend and save the County of San Mateo, its officers, agents and employees, free and harmless from any and all expense, cost, or liability in connection with or resulting from work or stopped-work associated with the permit, including, but not limited to, property damage, personal injury, wrongful death, and loss of income.

D. All borings must be properly destroyed (grouted/sealed) within 24 hours of drilling, unless special conditions are approved beforehand in writing as part of this permit, and must be continuously protected and stabilized.

E. Analytical results of all soil, vapor, and groundwater samples collected during the execution of drilling under this permit must be submitted to County GPP staff by the Responsible Professional within 60 days of sample collection. If contamination is discovered during drilling, verbal notification to County GPP by the Responsible Professional is required within 72 hours of discovery. Proper storage, labeling & disposal of investigation-derived residual wastes are the responsibility of the consultant unless stated otherwise contractually.

F. Boring logs, well construction details, and finalized as-built location map for all borings/ wells (except geotechnical borings) signed by a Responsible Professional, must be submitted to County GPP by the Responsible Professional within 60. days of drilling/construction/destruction. DWR Form 188 must be filed with the State per water code 13752.

G. Permit is valid only for the purpose specified herein. No change in purpose or required procedures, as described on this permit application, in the associated workplan, or in the special conditions below, will be allowed except upon written permission from the County. Construction aspects can be changed based on conditions encountered in the field.

H. Permit is valid for one mobilization associated with originally permitted boring/well locations only, including contingency locations, and is automatically canceled if not exercised, or if an extension is not applied for and granted within 120 days of the original permit issuance date. Failure to notify staff of cancellation or delay in start time will result in the Consultant being billed an inspection cancellation fee if GPP staff attempted to perform an inspection. Fees are listed at smchealth.org/ehfees.

I. Wells installed under this permit may not be used for domestic, municipal, agricultural , or irrigation water supply.

J. All work performed must conform to Business and Profession Codes and State Water Well Standards.

K. Top-of-casing elevation of all wells must be surveyed to the nearest 0.01-foot relative to Mean Sea Level or NAVD88 and submitted to County GPP within 60 days of drilling, and to State Geo Tracker as appropriate. Geotechnical wells are exempt from this requirement if a written variance from GPP is obtained prior to drilling.

L. Latitude and longitude of all wells must be surveyed with sub-meter accuracy relative to NAD83 and submitted to County GPP within 60 days nf drilling, and ta State Geairacker as appropriate M. Violation of any requirement or general or special permit condition may result in an order by GPP staff to cease work under this permit, correct the violation, potentially re-permit the work as a new mobilization, and potential actions may be taken against the Well Owner, Property Owner, or Responsible Professional by GPP.

SPECIAL CONDITIONS:
-----~---------------------------- (agency use only)
Agency Use Only:

Signature: FA# Date:

Rev. 111912021 SMC Ordinance
7780 of 11211
,
• PERMIT APPLICATION INSTRUCTIONS AND FEES
A subsurface drilling permit for borings and wells is required if groundwater is anticipated to be encounte~ed or if drilling extends to 10 feet or deeper. Sub-slab and vapor wells shallower than 1 O feet do not require a permit. Should groundwater be encountered shallower than 1 O feet unexpectedly. then contact San Mateo County EHS Groundwater Protection Program (GPP) immediately and a permit application will be reguired retroactively. GPP is the permitting agency for all subsurface drilling for environmental and geotechnical purposes within San Mateo County. San Mateo County EHS Land Use Program (LUP) reviews all water well permit applications (smchealth.org/environ/forms) for public supply. domestic. agricultural. cathodic protection. exploratory. and geothermal heat exchange well construction and destruction and permit applications for all reconnaissance. investigation, and excavation work strictly for land use purposes. Please contact the LUP at (650) 372-6200 to discuss permitting, notification, and drilling requirements.

A 120-day extension may be granted for permits which have not been used durin the ori inal 120-da time frame. Submit anot er ubsurface Drilling Permit Application and payment for the permit extension fee at 50% of the fee for the type of drilling. Extension must be requested prior to the original permit expiring. If there are several wells and borings over several contiguous assessor's parcels and public right-of-ways, then discuss the fee with the County inspector at (650) 464-0047 or [email protected]. The County inspector may charge only one fee for borings and wells constructed across contiguous assessor's parcels and public right-of- ways. However, this is dependent on how much the County inspector believes will need to be inspected in the field and how much review time of required submittals will be needed.

Section 1: Purpose of Application
At least one of the four boxes must be selected; however, multiple boxes may be selected as long as all of the wells and borings are on the same assessor's parcel or public right-of-way (see Section 4). A boring under this permit application is defined as a constructed hole lasting less than 24 hours before being properly destroyed. After 24 hours, the constructed hole is considered a well under this permit application which needs to be constructed appropriately unless special conditions are approved as part of the permit. If permit extension is selected, then write in the permit number of the permit to be extended. List the number of wells and borings anticipated to be drilled and what they will be named. This number may change in the field based on conditions encountered.

Section 2: Purpose of Drilling
At least one of the two boxes must be selected; however, both boxes may be selected as long as both purposes of drilling are to be conducted on the same assessor"s parcel or public right-of-way (see Section 4). Geotechnical drilling may also be conducted under San Mateo County's Annual Geotechnical Drilling Permit in which consulting companies pay an annual fee to perform this type of drilling an unlimited amount of times for 365 days after obtaining the Annual Geotechnical Drilling Permit. Fees are listed at smchealth.org/ehfees. Please note, a Notification Form (not available on website) similar to this Subsurface Drilling Permit Application must be completely filled out and submitted at least 2 business days (48 hours) prior to drilling under the Annual Geotechnical Drilling Permit.

Section 3: Lead Agency
One of the three boxes must be selected. The EHS GPP would be selected only for investigations of known contaminated sites that the County is the lead agency. For drilling required by the Regional Water Quality Control Board (RWQCB), Department of Toxic Substances Control (DTSC), or the United States Environmental Protection Agency (USEPA), please include a copy of their approval letter. None would refer to investigations required by the County CUPA (Hazardous Materials Program), County Land Use or Solid Waste Programs, County or City Planning or Building Departments or voluntary investigations for due diligence or property transactions.

Section 4: Drilling lnfonnation
All applicable spaces must be filled in. Agency Case# refers to the·lead agency"s case number, if overseen by an agency, for the project under which the investigation is being conducted. Assessor's parcel number is the 9-digit number corresponding to the specific private property the drilling is proposed to be conducted on (can be found under Secured Property Taxes at sanmateocountytaxcollector.org or .MN).Each permit must include only one assessor"s parcel number. If the drilling is to be conducted only in public right-of-ways, then the assessor's parcel number space should be filled in with N/A for not applicable. If drilling is to occur on both a private property and a contiguous public right-of-way, then two permits (one for the private property and one for the public right-of-way) must be filled out. Address, City, and Zip refer to the location of the specific property drilling is proposed to be conducted on. The address for a public right-of-way would simply be the name of the specific section of the public right-of-way (ie. 100 block of Main Street). To be Constructed in must have one box selected. Again, this differentiates between a public right-of-way and a private property. Refuse is a special land use designation which needs to be indicated on the permit application.

Rev. 1119/2021 SMC Ordinance Title 4, Ch 4.68.080 Page 4 of 5 7781 of 11211
j
. PERMIT APPLICATION INSTRUCTONS AND FEES (CONTINUED)
Section 4, Drilling Information (continued)
The rest of this section is self-explanatory, may change in the field based on conditions encountered, and must be filled in except Destruction Method forborings only. Schematics may be submitted instead of filling in the well construction details, particularly if wells will be constructed differently from each other.

Destruction Method requires the use of a maximum of 7 gallons of water per 94 pounds of cement. This measurement (for both water and cement) must be able to be demonstrated in the field upon request from the inspector (such as using a 5- gallon bucket for measuring the water and using entire bags of cement). For pressure grouting, the well construction log and grout calculations must be submitted. The sand pack may not be more than 3 feet above the top of the screened interval, the screened interval may not be longer than 25 feet, and the bottom of the original boring may not be more than 2 feet deeper than the bottom of the constructed well. The total depth of the well and the fact that there are no obstructions in the well must be verified in the field . Type 1/11 cement grout must be tremied into the well. followed by application of 25 psi pressure maintained for 5 minutes. If the well does not meet pressure grouting criteria, it must be destroyed by drilling out to the total depth of the original boring. For overdrilling, the well casing and all annular material must be removed using a guide rod for the entire depth of the well inserted prior to drilling, and the boring tremie grouted to the surface using Type 1/11 cement grout. A general observation is that grouting borings using a % inch PVC pipe, typically used to collect grab groundwater samples in borings, does not work with a screened section. Free falling grout is only allowed if the boring is dry, or if water is present in less than 10% of the boring, and less than 30 feet deep. Grout calculations must be provided in a well destruction workplan.

Section 5: Well/Boring Owner
The name of the entity owning the wells and borings must be listed along with their contact person (if different from the name of the well/boring owner), address, telephone number, and email address. The contact person must be directly associated with or an agent of the entity owning the wells and borings such as a property manager, real estate manager, contractor, or lawyer but not the environmental consultant listed on the permit application in Section 8. A phone number and an email address must be provided to allow the inspector to contact the well/boring owner to verify information if necessary. By providing an email address, the well/ boring owner will receive an electronic copy of the permit. The permit application must be signed and dated by either the entity listed as the owner of the wells and borings or the contact person. Signatures · (Sections 5 through 8) do not need to be original; however, one copy of the permit application must contain all of the information besides the signatures in a legible format. ALL SIGNATURES REQUIRED (SECTIONS 5 THROUGH 8) DO NOT NEED TO BE ON THE SAME COPY OF THE PERMIT APPLICATION.

Section 6: Property Owner
The name of the entity owning the property must be listed and needs to match the name listed with the County Assessor for this property. The contact person must be directly associated with or an agent of the entity owning the property such as a property manager, real estate manager, contractor, or lawyer but not the environmental consultant listed on the permit application in Section 8. A telephone number and an email address must be provided to allow the inspector to contact the property owner to verify information if necessary. By providing an email address, the property owner will receive an electronic copy of the permit. The permit application must be signed and dated by the entity listed as the property owner only.

AGENTS CANNOT SIGN FOR THE PROPERTY OWNER. For public rights-of-way, a copy of the encroachment permit can be substituted for the property owner signature. The City of San Mateo, among others, will not issue an encroachment permit until the subsurface drilling permit is issued, but the City of San Mateo will issue a letter of intent to issue an encroachment permit which is acceptable as a substitute for the property owner signature in City of San Mateo rights-of-way.

Section 7: Drilling Company
The name of the company proposed to drill the wells and borings must be listed along with the drilling company contact person. address. phone number. and email address. In addition. the driller's C57 license number must be provided. By providing an email address, the drilling company will receive an electronic copy of the permit. The permit application must be signed and dated by the driller's contact person. If the drilling company changes, then a new subsurface drilling permit application should be filled out completely except for Sections 5, 6, and 8.

Section 8: Consulting Company
The name of the company overseeing the proposed drilling of the wells and borings must be listed along with the project manager, address, phone number, and email address. The responsible professional overseeing the work must print their name legibly, sign their name and date, and provide either their California Professional Geologist or Civil Engineering number. Field contact name and number, if known, are optional but beneficial for all parties involved.

Rev. 111912021 SMC Ordinance Title 4, Ch 4.68.080 Page 5 of 5 7782 of 11211
.... t
. ~· SAN MATEO COUNTY HEALTH

ENVIRONMENTAL

HEALTH SERVICES
Envlronrncntal Hea lth Services
Groundwater Protection Program
2000 Alameda de las Pulgas, Suite #100
San Mllleo, CA 94403
PhOM: (650) 372-8200 I Fax: (650) 627-8244
smchealth.orvlgpp

SUBSURFACE DRILLING PERMIT APPLICATION
Allow lhree (3) full wondng days for processing a complete permll appltcaHon whidl lndudes payment (on• permit par pan:al). DrWng atart date & Uma must ba scheduled wilh County staff at (850) 464-0047 ~ drl1hng@smq 1Qv Qtg lrt lent 2 full wor111ng daya (I.a. 41 houl'WJ In advanca. \111111 ..,,iclmalll• o,glehlt.~1• lor Gtoundwaear Prolllction Program r-.

PURPOSE OF 18)Groundwater Monito~ng/Vapor Well Installation Wonstruct Soil Borings (Variance request If to be left open >24 In) APPUCA TION O Groundwater MonitoringNapor Well Destruction Extension of Permit# No. of Wells4 No. of Borings 4 Well/Boring Names SVP-1, SVP-2, SVP-3, SVP-4, B-1 , B-2, B-3, B-4 _P_U_RP_O_ S_E_ O_F_ (8) _ E_nv_ ironmental LEAD D County GPP (permit approval is ,;:;;i'o be considered wcrk plan approval) _ DRILLING O Geotechnical AGENCY O RWQCB/OTSC/USEPA (Provide approval letter) 18) None (I.e. voluntary) SITE I DRILLING !~FORMATION
Agency Case # Assessor's Parcel # (requiled) 034179050 (one per permit) Dnlling Location Address: !East 4th Ave and South Ran road Ave Parking Lot ! City: ~n Mateo ·· Zip: 94401 To Be Constructed In: ~ Public Property D Private Property O Rafuse Maximum Proposed Depth (wells/borings)~ ".t. ~ _ .. __ ·----(feet) Drilling Method: !?irect Push Boring Diameter: 3.25 Inches Casing Diameter:~~'°'- FNter Pact lntarval:NIA Screen Interval: 17-18 ft bgs Destruction Method: D Pressure Grouting (provide well construction logs and grout calcs) (6 gallons water maxJ94 lb cement, up to 5% bentonite) Overdrilllng (guide rods for total ae,:,in pnoc lo 8la,ti requifed> Name: Promatheu1 Real Estate Gp~ Contad Pef90n: Don Peterson Addresa:1900 South Norfolk Sltae!, ~ii_!! ~-~ . City, State. Zip:San Mateo, CA. 94403 Telephone:850-931-3538 Email: [email protected] It is my reaponalbMlty lo notify the County or any known changes In the purpo18 of lh• wallboring l'rom that which is Indicated on this appllcatlon, to submit indlcallon of 81'1nual usage er weHa to Iha County, and lo maintain the well In good cordtlon. (Leifer 3/r,ned by w8Wbomg ownet'ltonlac:t ,-son, conlalning &bOl/9 language and atfHl/ng lo kl1owtadga of au perm/I ~ and oondlMona, may be IWl»lllutad for aignal!Jnl.) Well/Boring Owner's/Conlact Person's Signature: Date:

PROPtHT Y OWNER (Narni, ds aµpe,11~ un assessors roles shoul<l m,ifr.h s,gn:iturP) Name: City d San Mateo
Addniss:330 W 20th Avenue
Phone: 650-522-· 1153
Contact Person: Kathy Kleinbaum
City, Slate, Zlp:San Mateo, CA, 94403
Email: [email protected]
- - I oodwsland lhet a well/boring ia being instaNed on my property. I agrN b notlly the County and Well Owner of any known damage °' future IICCfl8 lalUN ID the well {Leltar siomKI blf Dl'Ol1#lfflf awnar. contain/no allow /anouaae. or IIIIMlflCMMnt ,-mwr may I» 5Ul)at#utad lrlf SJ91HJI I Property Owner's S1gna11Jni: ~ «:l,..._ _ ==---- Date: ~ l 1... '2.

DriDing Company: Gregg Ota~ Contact Person:!!Yan Lea __ _ Addresa:950 Howe Road City, State, Zip:Martinez, CA. 94~3 Phone: 925) 313-5800 Email:rlaa@gre rilling.com CST Drillers License# I c11111fy that lie w-;.ii/bollng wll tie constructed In complance MIi lie ClindNona of lt!la permit <-,_.), the San Maleo Oailnty Well Onlnaice, and lhe Slalll W.., Well Slandardl, and flat 1119 DcenN llled llbova ls COlllklef9d cunent and aaUY9 bv lie Cannctorl 91111 Lk:enu Bon.

Driller's Signature: Dete: 3121 /2022
Consultant Company: RMD Environmental Solutions, Inc. Project Manager: Kirsten °"!Y Address:1371 Oakland Blvd., Sta 200 City, State, Zip:Walnut c_raek, CA .. 94596 Telephone: 92~__!13-8177 Email: [email protected]
Field Contact & Cell# (if known): Glenn Carr (724) 422-?931 __ _ ..

I certify that this application la correct to Iha beat of my knowledge aid lt\1 welllbcllng wiU be conatNctedldeatroyed in oompliance w!lh the conditions of this permit (lee page 2), the San Mateo County WIM Ordinance, and Iha State Waler Wal Slandarda. I underaland that I Ml teepon&ible for Ge,-al CondiUona E, F, K, and Lor 1h19 permit and If I Indicated lhe purpcseof drilling ii geotacmical, then no one wll use Ille boring lo colect ariy samplas fOf environmental analyses. If hire Is a change In Raeponeible Pmfesalonal, I w!II notify San Mateo co ... t~ GPP staff.

Responsible Professlonal's Name (Pleasa print legibly):Benja"!i~ ~~Vei~h . _ Responsible Profesaionars Signature: Date: 3121/2022
~IJT,'iCJW Professional Geologist (PG) No or Civil Engineer (PE) No. Page 2 o15 7783 of 11211

SAN MATEO COUNTY HEALTH

ENVIRONMENTAL

HEALTH SERVICES
Environmental Health Services
Groundwater Protection Program
2000 Alameda de las Pulgas. Suite #100
San Mateo, CA 94403
Phone: (650) 372-6200 I Fax: (650) 627-8244
smchealth.org/gpp

SUBSURFACE DRILLING PERMIT APPLICATION
Allow three (3) full wor1cing days for processing a complete permit application which includes payment (one permit per parcel). Drilling start date & time must be scheduled with County staff at (650) 464-0047 or .dl:llllnSJ@!m!;Q!W,Oig at least 2 full working days (i.e. 48 hours) in advance.

Visit J~~ for Groundwater Protection Program fees.

PURPOSE OF 18] Groundwater MonitoringNapor Well Installation [8J Construct Soil Borings (variance request if to be left open >24 hrs) APPLICATION D Groundwater MonitoringNapor Well Destruction Extension of Permit# No. ofWells4 No. of Borings [] Well/Boring Names sv-P--1-.-s-vP---2.-s-v-P--3-. s_v_P_-4-.-0-1-. 0---2.-0--3-, -B-4- PURPOSE OF 18] Environmental LEAD D County GPP (permit approval is not to be considered work plan approval) DRILLING O Geotechnical AGENCY O RWQCB/DTSC/USEPA (Provide approval letter) 18] None (i.e. voluntary) Agency Case # Assessor's Parcel # (required) 034179050
Drilling Location Address: !East 4th Ave and South Railroad Ave Parking Lot ! City: San Mateo To Be Constructed In: 18] Public Property D Private Property D Refuse (one per permit)
Zip: 94401
Maximum Proposed Depth (wells/borings) _3_5_ft_bg....._s __________ (feet) Drilling Method: _D_ire_c_t_P_u_sh ____ _ Boring Diameter: 3.25 inches Casing Diameter:N/A Filter Pack lnterval:N/A Screen Interval: 17-18 ft bgs ----- ------ Destruction Method: D Pressure Grouting (provide well construction logs and grout calcs) (6 gallons water max/94 lb cement, up to 5% bentonite) D Overdrilling (guide rods for total depth prior to starting required) WELUBORING OWNER (Well/boring,~wner name or contact person should- f!latch signature) Name: Prometheus Real Estate Group Contact Person: Don Peterson ------------------ Address:1900 South Norfolk Street, Suite 150 City, State, Zip:_S_a_n_M_a_te_o...a,_C_A""",_944_0_3 ________ _ Telephone: 650-931-3538 Email: [email protected] It is my responsibility to notify the County of any known changes in the purpose of this well/boring from that which is indicated on this application, to submit indication of annual usage of wells to the County, and to maintain the well in good condition. (Letter signed by well/boring owner/contact person, containing above language and attesting to knowledge of all permit requirements and conditions, may be substituted for signature.) Well/Boring Owner's/Contact Person's Signature: Date:

PROPERTY OWNER (Name"as appears on assessor's roles should match signature) Name: City of San Mateo
Address:330 W 20th Avenue
Contact Person: Kathy Kleinbaum
------------------ City, State, Zip:San Mateo, CA, 94403 Phone: 650-522-· 7153 Email: [email protected] I understand that a well/boring is being installed on my property. I agree to notify the County and Well Owner of any known damage or future access issues to the well (Letter signed by property owner, containing above language, or encroachment permit may be substituted for signature) Property Owner's Signature: Date:

Drilling Company: Gregg Drilling Contact Person:_R~y_an_ L_ea ____________ _ Address:950 Howe Road City, State, Zip:Martinez, CA, 94553 --------------------- Phone: (925) 313-5800 Email: [email protected] C57 Drillers License #_1_04_4_4_56 ____ _ I certify that the welVboring will be constructed in compliance with the conditions of this permit (see reverse), the San Mateo County Well Ordinance, and the State Water Well Standards, and that the license listed above is considered current and active by the Contractors State License Board.

Driller's Signature: Date: 3/21/2022
Consultant Company: RMD Environmental Solutions, Inc.

Address:1371 Oakland Blvd., Ste 200.

Telephone: 925-683-8177
Project Manager: _K_ir_s_te_n_D_u_e_,y.__ __________ _
City, State, Zip:Walnut Creek, CA., 94596
Email: [email protected]
Field Contact & Cell# (if known): .;::; G:..:..le:..:.n:..:.. n;..;C;;.;a;;.:.rr~(7...;;; 2;..;. 4.._) -"422=-·.;;;;. 29.;;..3;;..1'-------------------------- 1 certify that this application is correct to the best of my knowledge and the well/boring will be constructed/destroyed in compliance with the conditions of this permit (see page 2), the San Mateo County Well Ordinance, and the State Water Well Standards. I understand that I am responsible for General Conditions E, F, K, and L of this permit and if I indicated the purpose of drilling is geotechnical, then no one will use the boring to collect any samples for environmental analyses. If there is a change in Responsible Professional, I will notify San Mateo County GPP staff.

Responsible Professional's Name (Please print legibly):-=B-=e;..; nJ,c: .a;..;m;..;i;..;. n;..;M;..;c;..;V....;; e.;,ig'"h------------------- Responsible Professional's Signature: Date: 3/21/2022
Ca I if om i a Professional Geologist (PG) ----------------------- No. Rev. 1/19/2021 ---------- or Civil Engineer (PE) No. Page 2 at s 7784 of 11211

SAN MATEO COUNTY HEALTH

ENVIRONMENTAL

HEALTH SERVICES
Environmental Health Services
Groundwater Protection Program
2000 Alameda de las Pulgas, Suite #1 00
San Mateo, CA 94403
Phone: (650) 372-6200 I Fax: (650) 627-8244
smchealth.org/gpp

SUBSURFACE DRILLING PERMIT APPLICATION
Allow three (3) full working days for processing a compjete permit application which includes payment (one permit per parcel). Drilling start date & time must be scheduled with County staff at (650) 464-0047 or [email protected] at least 2 full working days (i.e. 48 hours) in advance.

Visit !111)(:!).ealth.org/ehrees for Groundwater Protection Program fees.

PURPOSE OF [8]Groundwater MonitoringNapor Well Installation 18] Construct Soil Borings (variance request if to be left open >24 hrs) APPLICATION O Groundwater MonitoringNapor Well Destruction Extension of Permit# No. ofWells4 No. of Borings [] Well/Boring Names SVP-1, ------------ SVP-2, SVP-3, SVP-4, B-1 , B-2, B-3, B-4 - PURPOSE OF 18] Environmental LEAD O County GPP (permit approval is not to be considered work plan approval) DRILLING O Geotechnical AGENCY O RWQCB/DTSC/USEPA (Provide approval letter) 18] None (i.e. voluntary)

SITE ( DRILLING INFORMATION
Agency Case# Assessor's Parcel# (required) 034179050
Drilling Location Address: I East 4th Ave and South Railroad Ave Parking Lot ! City: San Mateo To Be Constructed In: 18] Public Property O Private Property D Refuse (one per permit)
Zip: 94401
Maximum Proposed Depth (wells/borings) _3_5_ft_b_.g __ s______ ___ (feet) Drilling Method: _D_ire_ c_t_P_u_s_h ___ _ Boring Diameter: 3.25 inches Casing Diameter:N/A Filter Pack lnterval:N/A Screen Interval: 17-18 ft bgs ----- ------ Destruction Method: O Pressure Grouting (provide well construction logs and grout calcs) (6 gallons water max/94 lb cement, up to 5% bentonite) D Overdrilling (guide rods for total depth prior to starting required) IJ.IJELL/BORING OWNER (Well/boring owner name or contact person should match signature) Name: Prometheus Real Estate Group Contact Person: Don Peterson ----------------- Address:1900 South Norfolk Street, Suite 150 City, State, Zip:..::S-=a-=n-=M-=a-=te;.;;o..:.. , ..::. C ;..; A .:...., 944 '--;..::0..::. 3 _______ _ Telephone: 650-931-3538 Email: [email protected] It is my responsibility to notify the County of any known changes in the purpose of this well/boring from that which is indicated on this application, to submit indication of annual usage of wells to the County, and to maintain the well in good condition. (Letter signed by well/boring owner/contact person, containing above language end attesting to knowledge of all permit requirements and conditions, may be substituted for signature.) Well/Boring Owner's/Contact Person's Signature: Date:
g.~QJ=>~RTY S)_WNER . , . . · .•.. (Name as appears on assessor's roles should match signature) Name: City of San Mateo Contact Person: Kathy Kleinbaum ----"---------------- Address:330 W 20th Avenue City, State, Zip:..;;S..::. a..c. n..;.;M.;.;a-=te.;;..o~,.;.;C:..c.A.;.:.,...;;944..;....0.;;..3:__ _______ _ Phone: 650-522-· 7153 Email: [email protected] I understand that a well/boring is being installed on my property. I agree to notify the County and Well Owner of any known damage or future access issues to the wefl (Letter signed by property owner, containing above language, or encroachment permit may be substituted for signature) Property Owner's Signature: Date:

Drilling Company: Gregg Drilling Contact Person:_R.:... ya_n_ Le_a ____________ _ Address:950 Howe Road City, State, Zip:_M_a_rt_in_e_z,'-C_A-''-94_ 5_5_3 ________ _ Phone: (925) 313-5800 Email: [email protected] C57 Drillers License# ______ _ I certify that the well/boring will be constructed in compliance with the conditions of this permit (see reverse), the San Mateo County Well Ordinance, and the State Water Well Standards, and that the license listed above is considered current and active by the Contractors State License Board.

Driller's Signature: Date: 3/21/2022 ~~ ---
f:Q.~SU.LJANT;,<;:P~P.ANY . · , .. ... • ,I
Consultant Company: RMD Environmental Solutions, Inc.

Address:1371 Oakland Blvd., Ste 200.

Project Manager: _K_irs_ te_n_D_ ue..::.y~------------
City, State, Zip:Walnut Creek, CA., 94596
Telephone: 925-683-8177 Email: _k_du_e_.y._.@.._rm_d_e_s_.n_e_t ____________ _ Field Contact & Cell# (if known): .=G::.:le:..:.n::;n;.;;C:::.:a:::.:.rr.:....i.:(7.=2:..:4.1..) ..:.: 42=2=--=-29:::.:3=-1'------------------------- 1 certify that this application is correct to the best of my knowledge and the well/boring will be constructed/destroyed in compjiance with the conditions of this permit (see page 2), the San Mateo County Well Ordinance, and the State Water Well Standards. I understand that I am responsible for General Conditions E, F, K, and L of this permit and if I indicated the purpose of drilling is geotechnical, then no one will use the boring to collect any samples for environmental analyses. If there is a change in Responsible Professional, I will notify San Mateo County GPP staff.

Responsible Professional's Name (Please print legibly):_B_e_,nJ,_·a_m_in_ M.;.;c;...V.;.;e_,ig.._h __________________ _ Responsible Professional's Signature: Benjamin McVeigh
California Professional Geologist (PG) No. __ 9_75_0 ________ or Civil Engineer (PE) No. Page 2 of s Rav. 1119/2021 - 7785 of 11211
LEGEND
D = Proposed Soil Vapor Probe
Location
Q = Proposed Grab
Groundwater Boring Location
RM D i East 4th Avenue and • South Railroad Avenue PROPOSED BORING/ SOIL VAPOR N ENVIRONMENTAL~ SAN MATEO, CALIFORNIA PROBE LOCATIONS SOL UTIONS PROJECT NO. DATE DR. BY: APP. BY: o 80 160 01 -PR0-003 08/2020 KO FIGURE DCB HORIZONTAL SCALE IN FEET 1 7786 of 11211

APPENDIX B
Boring Logs
7787 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base material

0.5 Silt (ML) dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5). 0805 0.7

2.3 0810 1.8 Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor, (35,45,15,5).

Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, low-plasticity, no odor, (25,50,10,15). 0815 1.0

2.8 0800 1
2 3
4 5
B-1
Well construction details

PID (PPM)
6" Asphalt
Terracore/Bailer
--
03/30/22
BORING/WELL ID:

Sandy Silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5).

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
0 FIRST WATER (BGS): 30 ft bgs
34 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)

22.5 ft bgs
SAMPLING METHOD:

START DATE/TIME: 03/30/22 / 0742
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
Northwest Corner of Site
Gregg Drilling / Direct Push
Sandy lean clay (CL), strong brown (7.5YR 4/6), dry, dense, medium plasticity, no odor, (5,30,5,60). 6 7
15 10
13 14
8 9
12 11
16 17
20 18
19 z
7788 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

BORING/WELL ID:

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Becomes moist, soft, increasing sand content.

2.5 1.5
Clayey sand with gravel (SM), brown (7.5YR 4/3), wet, soft, non-plastic, no odor, (25,45,5,25). 0930 2.8

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
Install temporary 0.010-inch slotted screen from 29-34 ft bgs.

Grab groundwater collected.

Dry granular Bentonite from 1 to 0.5 ft bgs.

End of boring at 34 ft bgs.
39 27
38 36
37 26
34 SURFACE ELEVATION:
32 30
29 28
20 Backfilled with neat cement grout to ~ 1. ft bgs.

Surface was patch to match surrounding surface.
40 33
B-1

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Depth (feet)
PROJECT NAME AND ADDRESS:

Well construction details
34 ft bgs
30 ft bgs 22.5 ft bgs
--
FIRST WATER (BGS):

East 4th Ave and South Railroad Ave, San Mateo, CA
Gregg Drilling / Direct Push
Terracore/Bailer
03/30/22 / 0742 03/30/22
Northwest Corner of Site

PID (PPM)
BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

Sampling Method
START DATE/ TIME:
35 31
TOTAL BORING DEPTH(S):
21 22
25 24
23 7789 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base fill material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5, 10, 80, 5). 1315 0.5
1320 1.0
Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor, 1325 1.8 (35, 45, 15, 5).

Clayey sand with gravel (SC) brown (7.5YR 4/4), dry, soft, non-plasticity, no odor, (25, 50, 10, 15). 1330 1.9

2.7 16
17 20
18 19
8 9
12 11
15 10
13 14
6 7
4 Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5, 30, 60, 5).

Sandy lean clay (CL) strong brown, (7.5YR 4/6), dry, dense, medium plasticity, no odor, (5, 30, 5, 60). 5 1
2 3
SAMPLING METHOD:

START DATE/TIME: 03/29/22 / 1300
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
North corner of parking lot
Gregg Drilling / Direct Push
0 FIRST WATER (BGS): 28 ft bgs
34 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)

23.60 ft bgs
B-2
Well construction details

PID (PPM)
6" Asphalt
Terracore/Bailer
--
3/29/22
BORING/WELL ID:

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
7790 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

BORING/WELL ID:

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/ TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

1.6 2.5
Increasing sand, soft, moist
Wet

2.4 Well graded sand (SW), brown (7.5YR 4/3), wet, soft, non-plastic, no odor.

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

Sampling Method
START DATE/ TIME:
35 31
TOTAL BORING DEPTH(S):
21 22
25 24
23 Terracore/Bailer
03/29/22 / 1300 3/29/22
North corner of parking lot

PID (PPM)
B-2

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Depth (feet)
PROJECT NAME AND ADDRESS:

Well construction details
34 ft bgs
28 ft bgs 23.60 ft bgs
--
FIRST WATER (BGS):

East 4th Ave and South Railroad Ave, San Mateo, CA
Gregg Drilling / Direct Push
40 33
38 39
28 Backfilled with neat cement grout to ~ 1. ft bgs.

Surface was patch to match surrounding surface.

End of boring at 34 ft bgs.

SURFACE ELEVATION:
34 32
Clayey sand with gravel (SC), brown (7.5YR 4/3), wet, soft, non-plastic, no odor, (25, 45, 5, 25). 30 26
27 29

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
Install temporary 0.010-inch slotted screen from 29-34 ft bgs.

Grab groundwater collected.
36 Dry granular Bentonite from 1 to 0.5 ft bgs.
37 20
7791 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base fill
1055 0.9 Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5). 1100 1.5
1105 3.8
Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, low plasticity, no odor, (25,50,10,15). 1110 3.4

3.1 16
17 20
18 19
12 13
14 8
9 Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, ( 5,30,60,5).

0.25" to 0.75" subangular gravel, (35,45,15,5).
5 6
7 11
15 10
Sandy lean clay (CL) strong brown (7.5YR 4/6), moist, dense, medium plasticity, no odor, (5,30,5,60).

SAMPLING METHOD:

START DATE/TIME: 03/29/22 / 1045
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
Center of parking lot
Gregg Drilling / Direct Push
0 FIRST WATER (BGS): 30 ft bgs
34 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)

23.6 ft bgs
B-3
Well construction details

PID (PPM)
6" Asphalt
Terracore/Bailer
--
03/29/22 / 1230
BORING/WELL ID:

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor 1 2
3 4
7792 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

BORING/WELL ID:

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/ TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

2.3 2.7

3.0 Clayey sand with gravel (SC) brown (7.5YR 4/3), wet, soft, low plasticity, no odor, (25, 45, 5, 25).

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
Install temporary 0.010-inch slotted screen from 29-34 ft bgs.

Grab groundwater collected.

Dry granular Bentonite from 1 to 0.5 ft bgs.

End of boring at 34 ft bgs.
29 28
1200
Becomes moist, soft
Very moist, increasing sand, soft
20 27
26 33
SURFACE ELEVATION:
34 32
30 39
Backfilled with neat cement grout to ~ 1. ft bgs.

Surface was patch to match surrounding surface.
40 38
36 37
B-3

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Depth (feet)
PROJECT NAME AND ADDRESS:

Well construction details
34 ft bgs
30 ft bgs 23.6 ft bgs
--
FIRST WATER (BGS):

East 4th Ave and South Railroad Ave, San Mateo, CA
Gregg Drilling / Direct Push
Terracore/Bailer
03/29/22 / 1045 03/29/22 / 1230
Center of parking lot

PID (PPM)
BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

Sampling Method
START DATE/ TIME:
35 31
TOTAL BORING DEPTH(S):
21 22
25 24
23 7793 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy 0845 1.7 Aggregate base material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5). 0850 1.4

2.4 0855 3.0
0900 3.4

2.2 2.2
Sandy lean clay (CL), strong brown (7.5YR 4/6), moist to very moist, soft, medium plasticity, no odor, (5,30,5,60).

Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor 8 Very moist.
16 17
12 13
14 11
10 9
6 7
20 18
19 4
Increasing sand and gravel.

Clayey sand with gravel (SC), brown (7.5YR 4/4), moist, soft, non-plastic, no odor, (30,45,10,15).

Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5).

0.25" to 0.75" subangular gravels, (35,45,15,5).

Increasing gravel.
15 5
1 2
3 SAMPLING METHOD:

START DATE/TIME: 03/29/22 / 0815
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
Southeast side of Parking Lot
Gregg Drilling / Direct Push
0 - -
FIRST WATER (BGS): 30 ft bgs
34 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)
- -

23.5 ft bgs

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
B-4
Well
construction
details

PID (PPM)
6" Asphalt
Terracore/Bailer
--
03/29/22 / 1030
BORING/WELL ID:
z
7794 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

BORING/WELL ID:

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/ TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

2.9 Becomes very stiff, dry.

2.1 2.9
Clayey sand with gravel (SC), brown (7.5YR 4/3), wet, soft, non-plastic, no odor, (25,45,5,25).

3.4 1020
20 26
29 BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

Sampling Method
START DATE/ TIME:
32 30
Very moist.

3.25" from 0 to 5 ft bgs, 2.25" from 5 to 34 ft bgs
35 31
TOTAL BORING DEPTH(S):
21 22
25 24
23 34
Terracore/Bailer
03/29/22 / 0815 03/29/22 / 1030
Southeast side of Parking Lot

PID (PPM)
B-4

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Depth (feet)
PROJECT NAME AND ADDRESS:

Well
construction
details
- - - -
34 ft bgs
30 ft bgs 23.5 ft bgs
--
FIRST WATER (BGS):

East 4th Ave and South Railroad Ave, San Mateo, CA
Gregg Drilling / Direct Push
SURFACE ELEVATION:

Backfilled with neat cement grout to ~ 1. ft bgs.

Surface was patch to match surrounding surface.

Install temporary 0.010-inch slotted screen from 29-34 ft bgs.

Grab groundwater collected.

Dry granular Bentonite from 1 to 0.5 ft bgs.

End of boring at 34 ft bgs.
40 33
28 27
38 36
37 39
7795 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5).

Well graded sand with gravel (SW), brown (7.5YR 4/4), dry, loose, non-plastic, no odor, Sandy lean clay (CL), strong brown (7.5YR 4/6), dry, dense, medium plasticity, no odor, (5,30,5,60). 8 9
11 15
10 12
13 14
Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5). 5 6
7 18
16 4
End of borehole at 15.5 feet bgs.
20 19
17 1
2 3
SAMPLING METHOD:

START DATE/TIME: 3/30/22
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
NW corner of site
Gregg Drilling / Direct Push
0 --
FIRST WATER (BGS): --

15.5 ft. bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)
--
--

3.25"from 0 to 5 ft., 2.25" from 5 to 15.5 ft. bgs
SVP-1
Well construction details

PID (PPM)
6 inches Asphalt
--
--
3/30/22
BORING/WELL ID:
(25, 50, 10, 15).

Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, non-plastic, no odor, (25, 50, 10, 15).

No. 2/12 Sand Pack

0.25 inch Teflon Tubing
Dry
Bentonite
Vapor
Probe
Hydrated
Bentonite
z
Dry
Bentonite
7796 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5). 16 17
20 18
19 5
6 7
8 9
12 11
15 10
13 14
4 End of borehole at 16 feet bgs.

Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5). 1 2
3 SAMPLING METHOD:

START DATE/TIME: 03/30/22
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
North corner of parking lot
Gregg Drilling / Direct Push
0 --
FIRST WATER (BGS): --
16 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)
--
--

3.25"from 0 to 5 ft., 2.25" from 5 to 16 ft. bgs
SVP-2
Well construction details

PID (PPM)
6" Asphalt
--
03/30/22
BORING/WELL ID:

Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor, (35,45,15,5).

Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, low-plasticity, no odor, (25,50,10,5).

Hydrated
Bentonite

0.25 inch Teflon Tubing
Dry
Bentonite
No. 2/12 Sand Pack
Dry
Bentonite
Vapor
Probe
z
7797 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5). 0 16
17 20
18 19
11 15
10 8
9 12
13 14
5 6
7 Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5).

Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor, (35,45,15,5).

Sandy lean clay (CL).

End of borehole at 16 feet bgs.
3 4
SAMPLING METHOD:

START DATE/TIME: 3/30/22
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
Center of parking lot
Gregg Drilling / Direct Push
FIRST WATER (BGS): --
16 ft. bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)
--
--
SVP-3
Well construction details

PID (PPM)
6" Asphalt
--
3/30/22
BORING/WELL ID:
--

3.25"from 0 to 5 ft., 2.25" from 5 to 16 ft. bgs
Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, non-plastic, no odor, (25,50,10,15). 0 1
2 Vapor
Probe
No. 2/12 Sand Pack
Dry
Bentonite
Hydrated
Bentonite

0.25 inch Teflon Tubing
Dry
Bentonite
z
7798 of 11211
1371 Oakland Boulevard, Suite 200 - Walnut Creek, California - 94596

Project No.: 01-PRO-011
Logged By: G. Carr
MONITORING DEVICE:

FINISH DATE/TIME:

STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Aggregate base material
Silt (ML), dark brown (10YR 3/3), dry, soft, non-plastic, no odor, (5,10,80,5).

SVP-4
Well construction details

PID (PPM)
6" Asphalt
--
03/30/22
BORING/WELL ID:
0 --
FIRST WATER (BGS): --
16 ft bgs

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED SURFACE ELEVATION:

TOTAL BORING DEPTH(S):

Depth (feet)
--
--

3.25"from 0 to 5 ft., 2.25" from 5 to 16 ft. bgs
SAMPLING METHOD:

START DATE/TIME: 03/30/22
PROJECT NAME AND ADDRESS:

BORING LOCATION (AT SITE):

CONTRACTOR AND EQUIPMENT:

East 4th Ave and South Railroad Ave, San Mateo, CA
SE side of parking lot
Gregg Drilling / Direct Push
1 2
3 4
Clayey sand with gravel (SC), brown (7.5YR 4/4), dry, soft, non-plastic, no odor, (5,45,10,15).

Sandy silt (ML), dark yellowish brown (10YR 4/6), dry, soft, non-plastic, no odor, (5,30,60,5).

Well graded sand with gravel (SW), yellowish brown (10YR 5/6), dry, loose, non-plastic, no odor, (35,45,15,5).

End of borehole at 16 feet bgs.
5 6
7 11
15 10
8 9
20 18
19 16
17 12
13 14 No. 2/12 Sand Pack
Dry
Bentonite
Hydrated
Bentonite

0.25 inch Teflon Tubing
.

Dry
Bentonite
z
Vapor
Probe
7799 of 11211
RMD ENVIRONMENTAL SOLUTIONS, INC.

APPENDIX C
Field Data Sheets

7800 of 11211
RMD ENVIRONMENTAL SOLUTIONS, INC.

APPENDIX D
Laboratory Analytical Reports
7801 of 11211

ANALYTICAL REPORT
April 06, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1476737
Samples Received: 03/30/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 06, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 1 of 54 April 06, 2022
Jordan N Zito
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7802 of 11211 1 of 54

TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Ds: Detection Summary 6
Sr: Sample Results 9
B-4-1 L1476737-01 9
B-4-5 L1476737-02 12
B-4-10 L1476737-03 15
B-4-15 L1476737-04 17
B-3-1 L1476737-05 19
B-3-5 L1476737-06 22
B-3-10 L1476737-07 25
B-3-15 L1476737-08 27
B-2-1 L1476737-09 29
B-2-5 L1476737-10 32
Qc: Quality Control Summary 35
Total Solids by Method 2540 G-2011 35
Mercury by Method 7471A 37
Metals (ICP) by Method 6010B 38
Volatile Organic Compounds (GC) by Method 8015 40
Volatile Organic Compounds (GC/MS) by Method 8260B 41
Semi-Volatile Organic Compounds (GC) by Method 8015 50
Gl: Glossary of Terms 52
Al: Accreditations & Locations 53
Sc: Sample Chain of Custody 54
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 2 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7803 of 11211 2 of 54

SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-4-1 L1476737-01 Solid G. Carr 03/29/22 08:45 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841038 1 04/01/22 08:21 04/01/22 08:28 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:21 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 22:51 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25.8 03/29/22 08:45 03/31/22 15:23 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1.03 03/29/22 08:45 04/02/22 01:43 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842789 1.03 03/29/22 08:45 04/04/22 19:12 BMB Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1841743 5 04/03/22 06:17 04/03/22 23:03 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-4-5 L1476737-02 Solid G. Carr 03/29/22 08:50 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841038 1 04/01/22 08:21 04/01/22 08:28 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:19 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 22:53 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25 03/29/22 08:50 03/31/22 15:46 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1 03/29/22 08:50 04/02/22 02:03 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842789 1 03/29/22 08:50 04/04/22 19:31 BMB Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1841743 1 04/03/22 06:17 04/03/22 16:55 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-4-10 L1476737-03 Solid G. Carr 03/29/22 08:55 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841038 1 04/01/22 08:21 04/01/22 08:28 KDW Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25.5 03/29/22 08:55 03/31/22 16:10 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1.02 03/29/22 08:55 04/02/22 02:23 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842789 1.02 03/29/22 08:55 04/04/22 19:51 BMB Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/05/22 22:02 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-4-15 L1476737-04 Solid G. Carr 03/29/22 09:00 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841038 1 04/01/22 08:21 04/01/22 08:28 KDW Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25 03/29/22 09:00 03/31/22 16:33 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1 03/29/22 09:00 04/02/22 02:42 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/05/22 22:53 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-3-1 L1476737-05 Solid G. Carr 03/29/22 10:55 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841038 1 04/01/22 08:21 04/01/22 08:28 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:16 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 22:56 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 26.5 03/29/22 10:55 03/31/22 16:56 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1.06 03/29/22 10:55 04/02/22 03:02 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/06/22 00:18 JN Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 3 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7804 of 11211 3 of 54

SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-3-5 L1476737-06 Solid G. Carr 03/29/22 11:00 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841039 1 04/01/22 08:06 04/01/22 08:13 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:14 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 22:59 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25.5 03/29/22 11:00 03/31/22 17:19 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1.02 03/29/22 11:00 04/02/22 03:21 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/06/22 00:01 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-3-10 L1476737-07 Solid G. Carr 03/29/22 11:05 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841039 1 04/01/22 08:06 04/01/22 08:13 KDW Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25 03/29/22 11:05 03/31/22 17:42 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1 03/29/22 11:05 04/02/22 03:41 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/05/22 23:10 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-3-15 L1476737-08 Solid G. Carr 03/29/22 11:10 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841039 1 04/01/22 08:06 04/01/22 08:13 KDW Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25 03/29/22 11:10 03/31/22 18:05 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1 03/29/22 11:10 04/02/22 04:00 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/05/22 23:27 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-2-1 L1476737-09 Solid G. Carr 03/29/22 13:15 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841039 1 04/01/22 08:06 04/01/22 08:13 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:11 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 23:02 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25.3 03/29/22 13:15 03/31/22 18:28 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842055 1.01 03/29/22 13:15 04/02/22 04:20 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 2 04/05/22 05:26 04/06/22 00:35 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-2-5 L1476737-10 Solid G. Carr 03/29/22 13:20 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841039 1 04/01/22 08:06 04/01/22 08:13 KDW Mt. Juliet, TN Mercury by Method 7471A WG1841078 1 04/05/22 12:57 04/06/22 09:09 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1841018 1 04/04/22 08:53 04/04/22 23:05 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1840999 25.8 03/29/22 13:20 03/31/22 18:51 BMB Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842238 1.03 03/29/22 13:20 04/03/22 01:12 JHH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/05/22 23:44 JN Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Metals (ICP) by Method 6010B
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1841018 (MS) R3777513-5, (MSD) R3777513-6 Antimony
The sample concentration is too high to evaluate accurate spike recoveries.

Batch Lab Sample ID Analytes
WG1841018 (MS) R3777513-5, (MSD) R3777513-6 Copper
Volatile Organic Compounds (GC) by Method 8015
The same analyte is found in the associated blank.

Batch Analyte Lab Sample ID
WG1840999 TPHG C5 - C12 L1476737-09
Volatile Organic Compounds (GC/MS) by Method 8260B
The same analyte is found in the associated blank.

Batch Analyte Lab Sample ID
WG1842789 1,2,4-Trimethylbenzene L1476737-01, 02
The associated batch QC was below the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1842238 (LCSD) R3777220-2, L1476737-10 Bromoform
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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Project Manager
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DETECTION SUMMARY
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-4-1 L1476737-01 Mercury 0.376 0.0434 1 04/06/2022 09:21 WG1841078 B-4-5 L1476737-02 Mercury 0.0665 0.0441 1 04/06/2022 09:19 WG1841078 B-3-1 L1476737-05 Mercury 0.867 0.0432 1 04/06/2022 09:16 WG1841078 B-3-5 L1476737-06 Mercury 0.0603 0.0436 1 04/06/2022 09:14 WG1841078 B-2-1 L1476737-09 Mercury 0.599 0.0432 1 04/06/2022 09:11 WG1841078 Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-4-1 L1476737-01 Arsenic 40.0 2.17 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Barium 135 0.543 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Beryllium 0.259 0.217 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Chromium 48.3 1.09 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Cobalt 9.02 1.09 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Copper 42.8 2.17 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Lead 94.3 0.543 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Molybdenum 0.623 0.543 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Nickel 46.8 2.17 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Vanadium 65.9 2.17 1 04/04/2022 22:51 WG1841018 B-4-1 L1476737-01 Zinc 125 5.43 1 04/04/2022 22:51 WG1841018 B-4-5 L1476737-02 Arsenic 8.72 2.20 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Barium 104 0.551 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Beryllium 0.503 0.220 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Chromium 67.5 1.10 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Cobalt 13.0 1.10 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Copper 24.8 2.20 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Lead 13.4 0.551 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Nickel 59.3 2.20 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Vanadium 68.4 2.20 1 04/04/2022 22:53 WG1841018 B-4-5 L1476737-02 Zinc 57.9 5.51 1 04/04/2022 22:53 WG1841018 B-3-1 L1476737-05 Arsenic 4.76 2.16 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Barium 157 0.540 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Beryllium 0.315 0.216 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Chromium 53.2 1.08 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Cobalt 10.8 1.08 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Copper 55.9 2.16 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Lead 37.8 0.540 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Nickel 52.1 2.16 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Vanadium 57.5 2.16 1 04/04/2022 22:56 WG1841018 B-3-1 L1476737-05 Zinc 107 5.40 1 04/04/2022 22:56 WG1841018 B-3-5 L1476737-06 Arsenic 4.99 2.18 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Barium 119 0.545 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Beryllium 0.413 0.218 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Chromium 62.9 1.09 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Cobalt 12.9 1.09 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Copper 22.8 2.18 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Lead 9.99 0.545 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Nickel 56.2 2.18 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Vanadium 65.5 2.18 1 04/04/2022 22:59 WG1841018 B-3-5 L1476737-06 Zinc 55.9 5.45 1 04/04/2022 22:59 WG1841018 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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DETECTION SUMMARY
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-2-1 L1476737-09 Arsenic 12.5 2.16 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Barium 213 0.540 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Beryllium 0.308 0.216 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Cadmium 0.647 0.540 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Chromium 49.0 1.08 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Cobalt 10.8 1.08 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Copper 74.3 2.16 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Lead 144 0.540 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Molybdenum 0.603 0.540 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Nickel 51.3 2.16 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Vanadium 57.1 2.16 1 04/04/2022 23:02 WG1841018 B-2-1 L1476737-09 Zinc 165 5.40 1 04/04/2022 23:02 WG1841018 B-2-5 L1476737-10 Arsenic 2.77 2.17 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Barium 127 0.541 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Beryllium 0.320 0.217 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Chromium 54.2 1.08 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Cobalt 11.3 1.08 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Copper 18.6 2.17 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Lead 6.88 0.541 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Nickel 50.0 2.17 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Vanadium 58.7 2.17 1 04/04/2022 23:05 WG1841018 B-2-5 L1476737-10 Zinc 49.2 5.41 1 04/04/2022 23:05 WG1841018 Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-2-1 L1476737-09 TPHG C5 - C12 3.16 B 2.94 25.3 03/31/2022 18:28 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-4-1 L1476737-01 Benzene 0.00325 0.00120 1.03 04/02/2022 01:43 WG1842055 B-4-1 L1476737-01 Naphthalene 0.0489 0.0151 1.03 04/04/2022 19:12 WG1842789 B-4-1 L1476737-01 Toluene 0.0107 0.00602 1.03 04/02/2022 01:43 WG1842055 B-4-1 L1476737-01 1,2,4-Trimethylbenzene 0.0224 B 0.00602 1.03 04/04/2022 19:12 WG1842789 B-4-1 L1476737-01 1,2,3-Trimethylbenzene 0.0146 0.00602 1.03 04/04/2022 19:12 WG1842789 B-4-1 L1476737-01 1,3,5-Trimethylbenzene 0.00635 0.00602 1.03 04/04/2022 19:12 WG1842789 B-4-1 L1476737-01 Xylenes, Total 0.0453 0.00783 1.03 04/04/2022 19:12 WG1842789 B-4-5 L1476737-02 1,2,4-Trimethylbenzene 0.00645 B 0.00604 1 04/04/2022 19:31 WG1842789 B-4-5 L1476737-02 Xylenes, Total 0.0126 0.00785 1 04/04/2022 19:31 WG1842789 B-4-10 L1476737-03 Tetrachloroethene 0.0113 0.00307 1.02 04/02/2022 02:23 WG1842055 B-3-1 L1476737-05 Benzene 0.0144 0.00122 1.06 04/02/2022 03:02 WG1842055 B-3-1 L1476737-05 Ethylbenzene 0.00502 0.00306 1.06 04/02/2022 03:02 WG1842055 B-3-1 L1476737-05 Tetrachloroethene 0.0473 0.00306 1.06 04/02/2022 03:02 WG1842055 B-3-1 L1476737-05 Toluene 0.0600 0.00612 1.06 04/02/2022 03:02 WG1842055 B-3-1 L1476737-05 1,2,4-Trimethylbenzene 0.0118 0.00612 1.06 04/02/2022 03:02 WG1842055 B-3-1 L1476737-05 Xylenes, Total 0.0702 0.00795 1.06 04/02/2022 03:02 WG1842055 B-3-5 L1476737-06 Benzene 0.00746 0.00120 1.02 04/02/2022 03:21 WG1842055 B-3-5 L1476737-06 Tetrachloroethene 0.00427 0.00301 1.02 04/02/2022 03:21 WG1842055 B-3-5 L1476737-06 Toluene 0.0310 0.00602 1.02 04/02/2022 03:21 WG1842055 B-3-5 L1476737-06 Xylenes, Total 0.0308 0.00782 1.02 04/02/2022 03:21 WG1842055 B-3-10 L1476737-07 Tetrachloroethene 0.0167 0.00307 1 04/02/2022 03:41 WG1842055 B-3-15 L1476737-08 Tetrachloroethene 0.00811 0.00286 1 04/02/2022 04:00 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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DETECTION SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-2-1 L1476737-09 Benzene 0.00402 0.00117 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Ethylbenzene 0.00542 0.00294 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Isopropylbenzene 0.00337 0.00294 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 2-Butanone (MEK) 0.123 0.117 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 4-Methyl-2-pentanone (MIBK) 0.0351 0.0294 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Naphthalene 0.0385 0.0146 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Tetrachloroethene 0.301 0.00294 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Toluene 0.0270 0.00586 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Trichloroethene 0.00127 0.00117 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 1,2,4-Trimethylbenzene 0.0251 0.00586 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 1,2,3-Trimethylbenzene 0.0217 0.00586 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 1,3,5-Trimethylbenzene 0.00786 0.00586 1.01 04/02/2022 04:20 WG1842055 B-2-1 L1476737-09 Xylenes, Total 0.0634 0.00761 1.01 04/02/2022 04:20 WG1842055 B-2-5 L1476737-10 2-Butanone (MEK) 0.124 0.120 1.03 04/03/2022 01:12 WG1842238 B-2-5 L1476737-10 Tetrachloroethene 0.00650 0.00300 1.03 04/03/2022 01:12 WG1842238 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-4-1 L1476737-01 C22-C32 Hydrocarbons 108 21.7 5 04/03/2022 23:03 WG1841743 B-4-1 L1476737-01 C32-C40 Hydrocarbons 58.2 21.7 5 04/03/2022 23:03 WG1841743 B-4-5 L1476737-02 C12-C22 Hydrocarbons 5.41 4.41 1 04/03/2022 16:55 WG1841743 B-4-5 L1476737-02 C22-C32 Hydrocarbons 25.6 4.41 1 04/03/2022 16:55 WG1841743 B-4-5 L1476737-02 C32-C40 Hydrocarbons 15.1 4.41 1 04/03/2022 16:55 WG1841743 B-3-1 L1476737-05 C12-C22 Hydrocarbons 6.70 4.32 1 04/06/2022 00:18 WG1842912 B-3-1 L1476737-05 C22-C32 Hydrocarbons 35.3 4.32 1 04/06/2022 00:18 WG1842912 B-3-1 L1476737-05 C32-C40 Hydrocarbons 28.2 4.32 1 04/06/2022 00:18 WG1842912 B-3-5 L1476737-06 C22-C32 Hydrocarbons 15.9 4.36 1 04/06/2022 00:01 WG1842912 B-3-5 L1476737-06 C32-C40 Hydrocarbons 13.5 4.36 1 04/06/2022 00:01 WG1842912 B-2-1 L1476737-09 C12-C22 Hydrocarbons 70.7 8.65 2 04/06/2022 00:35 WG1842912 B-2-1 L1476737-09 C22-C32 Hydrocarbons 222 8.65 2 04/06/2022 00:35 WG1842912 B-2-1 L1476737-09 C32-C40 Hydrocarbons 158 8.65 2 04/06/2022 00:35 WG1842912 B-2-5 L1476737-10 C22-C32 Hydrocarbons 12.9 4.33 1 04/05/2022 23:44 WG1842912 B-2-5 L1476737-10 C32-C40 Hydrocarbons 13.1 4.33 1 04/05/2022 23:44 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1476737
B-4-1
Collected date/time: 03/29/22 08:45
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.1 1 04/01/2022 08:28 WG1841038
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.376 0.0434 1 04/06/2022 09:21 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.17 1 04/04/2022 22:51 WG1841018
Arsenic 40.0 2.17 1 04/04/2022 22:51 WG1841018
Barium 135 0.543 1 04/04/2022 22:51 WG1841018
Beryllium 0.259 0.217 1 04/04/2022 22:51 WG1841018
Cadmium ND 0.543 1 04/04/2022 22:51 WG1841018
Chromium 48.3 1.09 1 04/04/2022 22:51 WG1841018
Cobalt 9.02 1.09 1 04/04/2022 22:51 WG1841018
Copper 42.8 2.17 1 04/04/2022 22:51 WG1841018
Lead 94.3 0.543 1 04/04/2022 22:51 WG1841018
Molybdenum 0.623 0.543 1 04/04/2022 22:51 WG1841018
Nickel 46.8 2.17 1 04/04/2022 22:51 WG1841018
Selenium ND 2.17 1 04/04/2022 22:51 WG1841018
Silver ND 1.09 1 04/04/2022 22:51 WG1841018
Thallium ND 2.17 1 04/04/2022 22:51 WG1841018
Vanadium 65.9 2.17 1 04/04/2022 22:51 WG1841018
Zinc 125 5.43 1 04/04/2022 22:51 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.02 25.8 03/31/2022 15:23 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.2 77.0-120 03/31/2022 15:23 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0602 1.03 04/02/2022 01:43 WG1842055
Acrylonitrile ND 0.0151 1.03 04/02/2022 01:43 WG1842055 Benzene 0.00325 0.00120 1.03 04/02/2022 01:43 WG1842055 Bromobenzene ND 0.0151 1.03 04/02/2022 01:43 WG1842055
Bromodichloromethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Bromoform ND 0.0302 1.03 04/02/2022 01:43 WG1842055
Bromomethane ND 0.0151 1.03 04/02/2022 01:43 WG1842055
n-Butylbenzene ND 0.0151 1.03 04/02/2022 01:43 WG1842055 sec-Butylbenzene ND 0.0151 1.03 04/02/2022 01:43 WG1842055 tert-Butylbenzene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 Carbon tetrachloride ND 0.00602 1.03 04/02/2022 01:43 WG1842055 Chlorobenzene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Chlorodibromomethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Chloroethane ND 0.00602 1.03 04/02/2022 01:43 WG1842055 Chloroform ND 0.00302 1.03 04/02/2022 01:43 WG1842055
Chloromethane ND 0.0151 1.03 04/02/2022 01:43 WG1842055 2-Chlorotoluene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 4-Chlorotoluene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 9 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7810 of 11211 9 of 54 SAMPLE RESULTS - 01
L1476737
B-4-1
Collected date/time: 03/29/22 08:45
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0302 1.03 04/02/2022 01:43 WG1842055 1,2-Dibromoethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Dibromomethane ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1,2-Dichlorobenzene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1,3-Dichlorobenzene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1,4-Dichlorobenzene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 Dichlorodifluoromethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,1-Dichloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,2-Dichloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,1-Dichloroethene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 cis-1,2-Dichloroethene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 trans-1,2-Dichloroethene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1,2-Dichloropropane ND 0.00602 1.03 04/02/2022 01:43 WG1842055 1,1-Dichloropropene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,3-Dichloropropane ND 0.00602 1.03 04/02/2022 01:43 WG1842055 cis-1,3-Dichloropropene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 trans-1,3-Dichloropropene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 2,2-Dichloropropane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Di-isopropyl ether ND 0.00120 1.03 04/02/2022 01:43 WG1842055 Ethylbenzene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Hexachloro-1,3-butadiene ND 0.0302 1.03 04/02/2022 01:43 WG1842055 Isopropylbenzene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 p-Isopropyltoluene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 2-Butanone (MEK) ND 0.120 1.03 04/02/2022 01:43 WG1842055 Methylene Chloride ND 0.0302 1.03 04/02/2022 01:43 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0302 1.03 04/02/2022 01:43 WG1842055 Methyl tert-butyl ether ND 0.00120 1.03 04/02/2022 01:43 WG1842055 Naphthalene 0.0489 0.0151 1.03 04/04/2022 19:12 WG1842789 n-Propylbenzene ND 0.00602 1.03 04/02/2022 01:43 WG1842055 Styrene ND 0.0151 1.03 04/02/2022 01:43 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Tetrachloroethene ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Toluene 0.0107 0.00602 1.03 04/02/2022 01:43 WG1842055
1,2,3-Trichlorobenzene ND 0.0151 1.03 04/02/2022 01:43 WG1842055 1,2,4-Trichlorobenzene ND 0.0151 1.03 04/02/2022 01:43 WG1842055 1,1,1-Trichloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,1,2-Trichloroethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Trichloroethene ND 0.00120 1.03 04/02/2022 01:43 WG1842055 Trichlorofluoromethane ND 0.00302 1.03 04/02/2022 01:43 WG1842055 1,2,3-Trichloropropane ND 0.0151 1.03 04/02/2022 01:43 WG1842055 1,2,4-Trimethylbenzene 0.0224 B 0.00602 1.03 04/04/2022 19:12 WG1842789 1,2,3-Trimethylbenzene 0.0146 0.00602 1.03 04/04/2022 19:12 WG1842789 1,3,5-Trimethylbenzene 0.00635 0.00602 1.03 04/04/2022 19:12 WG1842789 Vinyl chloride ND 0.00302 1.03 04/02/2022 01:43 WG1842055 Xylenes, Total 0.0453 0.00783 1.03 04/04/2022 19:12 WG1842789 (S) Toluene-d8 102 75.0-131 04/02/2022 01:43 WG1842055
(S) Toluene-d8 103 75.0-131 04/04/2022 19:12 WG1842789
(S) 4-Bromofluorobenzene 88.8 67.0-138 04/02/2022 01:43 WG1842055 (S) 4-Bromofluorobenzene 88.0 67.0-138 04/04/2022 19:12 WG1842789 (S) 1,2-Dichloroethane-d4 97.7 70.0-130 04/02/2022 01:43 WG1842055 (S) 1,2-Dichloroethane-d4 95.8 70.0-130 04/04/2022 19:12 WG1842789 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 10 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7811 of 11211 10 of 54 SAMPLE RESULTS - 01
L1476737
B-4-1
Collected date/time: 03/29/22 08:45
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 21.7 5 04/03/2022 23:03 WG1841743 C22-C32 Hydrocarbons 108 21.7 5 04/03/2022 23:03 WG1841743 C32-C40 Hydrocarbons 58.2 21.7 5 04/03/2022 23:03 WG1841743 (S) o-Terphenyl 73.8 18.0-148 04/03/2022 23:03 WG1841743 Sample Narrative:

L1476737-01 WG1841743: Cannot run at lower dilution due to viscosity of extract 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 11 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7812 of 11211 11 of 54 SAMPLE RESULTS - 02
L1476737
B-4-5
Collected date/time: 03/29/22 08:50
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 90.8 1 04/01/2022 08:28 WG1841038
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0665 0.0441 1 04/06/2022 09:19 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.20 1 04/04/2022 22:53 WG1841018
Arsenic 8.72 2.20 1 04/04/2022 22:53 WG1841018
Barium 104 0.551 1 04/04/2022 22:53 WG1841018
Beryllium 0.503 0.220 1 04/04/2022 22:53 WG1841018
Cadmium ND 0.551 1 04/04/2022 22:53 WG1841018
Chromium 67.5 1.10 1 04/04/2022 22:53 WG1841018
Cobalt 13.0 1.10 1 04/04/2022 22:53 WG1841018
Copper 24.8 2.20 1 04/04/2022 22:53 WG1841018
Lead 13.4 0.551 1 04/04/2022 22:53 WG1841018
Molybdenum ND 0.551 1 04/04/2022 22:53 WG1841018
Nickel 59.3 2.20 1 04/04/2022 22:53 WG1841018
Selenium ND 2.20 1 04/04/2022 22:53 WG1841018
Silver ND 1.10 1 04/04/2022 22:53 WG1841018
Thallium ND 2.20 1 04/04/2022 22:53 WG1841018
Vanadium 68.4 2.20 1 04/04/2022 22:53 WG1841018
Zinc 57.9 5.51 1 04/04/2022 22:53 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.02 25 03/31/2022 15:46 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.3 77.0-120 03/31/2022 15:46 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0604 1 04/02/2022 02:03 WG1842055
Acrylonitrile ND 0.0151 1 04/02/2022 02:03 WG1842055
Benzene ND 0.00121 1 04/02/2022 02:03 WG1842055
Bromobenzene ND 0.0151 1 04/02/2022 02:03 WG1842055
Bromodichloromethane ND 0.00302 1 04/02/2022 02:03 WG1842055 Bromoform ND 0.0302 1 04/02/2022 02:03 WG1842055
Bromomethane ND 0.0151 1 04/02/2022 02:03 WG1842055
n-Butylbenzene ND 0.0151 1 04/02/2022 02:03 WG1842055
sec-Butylbenzene ND 0.0151 1 04/02/2022 02:03 WG1842055 tert-Butylbenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 Carbon tetrachloride ND 0.00604 1 04/02/2022 02:03 WG1842055 Chlorobenzene ND 0.00302 1 04/02/2022 02:03 WG1842055
Chlorodibromomethane ND 0.00302 1 04/02/2022 02:03 WG1842055 Chloroethane ND 0.00604 1 04/02/2022 02:03 WG1842055
Chloroform ND 0.00302 1 04/02/2022 02:03 WG1842055
Chloromethane ND 0.0151 1 04/02/2022 02:03 WG1842055
2-Chlorotoluene ND 0.00302 1 04/02/2022 02:03 WG1842055 4-Chlorotoluene ND 0.00604 1 04/02/2022 02:03 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 12 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7813 of 11211 12 of 54 SAMPLE RESULTS - 02
L1476737
B-4-5
Collected date/time: 03/29/22 08:50
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0302 1 04/02/2022 02:03 WG1842055 1,2-Dibromoethane ND 0.00302 1 04/02/2022 02:03 WG1842055 Dibromomethane ND 0.00604 1 04/02/2022 02:03 WG1842055
1,2-Dichlorobenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 1,3-Dichlorobenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 1,4-Dichlorobenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 Dichlorodifluoromethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,1-Dichloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,2-Dichloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,1-Dichloroethene ND 0.00302 1 04/02/2022 02:03 WG1842055 cis-1,2-Dichloroethene ND 0.00302 1 04/02/2022 02:03 WG1842055 trans-1,2-Dichloroethene ND 0.00604 1 04/02/2022 02:03 WG1842055 1,2-Dichloropropane ND 0.00604 1 04/02/2022 02:03 WG1842055 1,1-Dichloropropene ND 0.00302 1 04/02/2022 02:03 WG1842055 1,3-Dichloropropane ND 0.00604 1 04/02/2022 02:03 WG1842055 cis-1,3-Dichloropropene ND 0.00302 1 04/02/2022 02:03 WG1842055 trans-1,3-Dichloropropene ND 0.00604 1 04/02/2022 02:03 WG1842055 2,2-Dichloropropane ND 0.00302 1 04/02/2022 02:03 WG1842055 Di-isopropyl ether ND 0.00121 1 04/02/2022 02:03 WG1842055 Ethylbenzene ND 0.00302 1 04/02/2022 02:03 WG1842055
Hexachloro-1,3-butadiene ND 0.0302 1 04/02/2022 02:03 WG1842055 Isopropylbenzene ND 0.00302 1 04/02/2022 02:03 WG1842055 p-Isopropyltoluene ND 0.00604 1 04/02/2022 02:03 WG1842055 2-Butanone (MEK) ND 0.121 1 04/02/2022 02:03 WG1842055
Methylene Chloride ND 0.0302 1 04/02/2022 02:03 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0302 1 04/02/2022 02:03 WG1842055 Methyl tert-butyl ether ND 0.00121 1 04/02/2022 02:03 WG1842055 Naphthalene ND 0.0151 1 04/02/2022 02:03 WG1842055
n-Propylbenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 Styrene ND 0.0151 1 04/02/2022 02:03 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 Tetrachloroethene ND 0.00302 1 04/02/2022 02:03 WG1842055 Toluene ND 0.00604 1 04/02/2022 02:03 WG1842055
1,2,3-Trichlorobenzene ND 0.0151 1 04/02/2022 02:03 WG1842055 1,2,4-Trichlorobenzene ND 0.0151 1 04/02/2022 02:03 WG1842055 1,1,1-Trichloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,1,2-Trichloroethane ND 0.00302 1 04/02/2022 02:03 WG1842055 Trichloroethene ND 0.00121 1 04/02/2022 02:03 WG1842055 Trichlorofluoromethane ND 0.00302 1 04/02/2022 02:03 WG1842055 1,2,3-Trichloropropane ND 0.0151 1 04/02/2022 02:03 WG1842055 1,2,4-Trimethylbenzene 0.00645 B 0.00604 1 04/04/2022 19:31 WG1842789 1,2,3-Trimethylbenzene ND 0.00604 1 04/04/2022 19:31 WG1842789 1,3,5-Trimethylbenzene ND 0.00604 1 04/02/2022 02:03 WG1842055 Vinyl chloride ND 0.00302 1 04/02/2022 02:03 WG1842055
Xylenes, Total 0.0126 0.00785 1 04/04/2022 19:31 WG1842789 (S) Toluene-d8 103 75.0-131 04/02/2022 02:03 WG1842055
(S) Toluene-d8 102 75.0-131 04/04/2022 19:31 WG1842789
(S) 4-Bromofluorobenzene 90.4 67.0-138 04/02/2022 02:03 WG1842055 (S) 4-Bromofluorobenzene 87.4 67.0-138 04/04/2022 19:31 WG1842789 (S) 1,2-Dichloroethane-d4 98.9 70.0-130 04/02/2022 02:03 WG1842055 (S) 1,2-Dichloroethane-d4 99.4 70.0-130 04/04/2022 19:31 WG1842789 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 13 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7814 of 11211 13 of 54 SAMPLE RESULTS - 02
L1476737
B-4-5
Collected date/time: 03/29/22 08:50
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons 5.41 4.41 1 04/03/2022 16:55 WG1841743 C22-C32 Hydrocarbons 25.6 4.41 1 04/03/2022 16:55 WG1841743 C32-C40 Hydrocarbons 15.1 4.41 1 04/03/2022 16:55 WG1841743 (S) o-Terphenyl 74.6 18.0-148 04/03/2022 16:55 WG1841743 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 14 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7815 of 11211 14 of 54 SAMPLE RESULTS - 03
L1476737
B-4-10
Collected date/time: 03/29/22 08:55
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 90.7 1 04/01/2022 08:28 WG1841038
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.07 25.5 03/31/2022 16:10 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.5 77.0-120 03/31/2022 16:10 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0614 1.02 04/02/2022 02:23 WG1842055
Acrylonitrile ND 0.0154 1.02 04/02/2022 02:23 WG1842055 Benzene ND 0.00123 1.02 04/02/2022 02:23 WG1842055
Bromobenzene ND 0.0154 1.02 04/02/2022 02:23 WG1842055
Bromodichloromethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Bromoform ND 0.0307 1.02 04/02/2022 02:23 WG1842055
Bromomethane ND 0.0154 1.02 04/02/2022 02:23 WG1842055
n-Butylbenzene ND 0.0154 1.02 04/02/2022 02:23 WG1842055 sec-Butylbenzene ND 0.0154 1.02 04/02/2022 02:23 WG1842055 tert-Butylbenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Carbon tetrachloride ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Chlorobenzene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Chlorodibromomethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Chloroethane ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Chloroform ND 0.00307 1.02 04/02/2022 02:23 WG1842055
Chloromethane ND 0.0154 1.02 04/02/2022 02:23 WG1842055 2-Chlorotoluene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 4-Chlorotoluene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,2-Dibromo-3-Chloropropane ND 0.0307 1.02 04/02/2022 02:23 WG1842055 1,2-Dibromoethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Dibromomethane ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,2-Dichlorobenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,3-Dichlorobenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,4-Dichlorobenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Dichlorodifluoromethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,1-Dichloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,2-Dichloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,1-Dichloroethene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 cis-1,2-Dichloroethene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 trans-1,2-Dichloroethene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,2-Dichloropropane ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,1-Dichloropropene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,3-Dichloropropane ND 0.00614 1.02 04/02/2022 02:23 WG1842055 cis-1,3-Dichloropropene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 trans-1,3-Dichloropropene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 2,2-Dichloropropane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Di-isopropyl ether ND 0.00123 1.02 04/02/2022 02:23 WG1842055 Ethylbenzene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Hexachloro-1,3-butadiene ND 0.0307 1.02 04/02/2022 02:23 WG1842055 Isopropylbenzene ND 0.00307 1.02 04/02/2022 02:23 WG1842055 p-Isopropyltoluene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 2-Butanone (MEK) ND 0.123 1.02 04/02/2022 02:23 WG1842055 Methylene Chloride ND 0.0307 1.02 04/02/2022 02:23 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0307 1.02 04/02/2022 02:23 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 15 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7816 of 11211 15 of 54 SAMPLE RESULTS - 03
L1476737
B-4-10
Collected date/time: 03/29/22 08:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00123 1.02 04/02/2022 02:23 WG1842055 Naphthalene ND 0.0154 1.02 04/02/2022 02:23 WG1842055
n-Propylbenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Styrene ND 0.0154 1.02 04/02/2022 02:23 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Tetrachloroethene 0.0113 0.00307 1.02 04/02/2022 02:23 WG1842055 Toluene ND 0.00614 1.02 04/02/2022 02:23 WG1842055
1,2,3-Trichlorobenzene ND 0.0154 1.02 04/02/2022 02:23 WG1842055 1,2,4-Trichlorobenzene ND 0.0154 1.02 04/02/2022 02:23 WG1842055 1,1,1-Trichloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,1,2-Trichloroethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Trichloroethene ND 0.00123 1.02 04/02/2022 02:23 WG1842055 Trichlorofluoromethane ND 0.00307 1.02 04/02/2022 02:23 WG1842055 1,2,3-Trichloropropane ND 0.0154 1.02 04/02/2022 02:23 WG1842055 1,2,4-Trimethylbenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,2,3-Trimethylbenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 1,3,5-Trimethylbenzene ND 0.00614 1.02 04/02/2022 02:23 WG1842055 Vinyl chloride ND 0.00307 1.02 04/02/2022 02:23 WG1842055 Xylenes, Total ND 0.00798 1.02 04/04/2022 19:51 WG1842789 (S) Toluene-d8 103 75.0-131 04/02/2022 02:23 WG1842055
(S) Toluene-d8 102 75.0-131 04/04/2022 19:51 WG1842789
(S) 4-Bromofluorobenzene 88.0 67.0-138 04/02/2022 02:23 WG1842055 (S) 4-Bromofluorobenzene 88.0 67.0-138 04/04/2022 19:51 WG1842789 (S) 1,2-Dichloroethane-d4 98.7 70.0-130 04/02/2022 02:23 WG1842055 (S) 1,2-Dichloroethane-d4 96.8 70.0-130 04/04/2022 19:51 WG1842789 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.41 1 04/05/2022 22:02 WG1842912 C22-C32 Hydrocarbons ND 4.41 1 04/05/2022 22:02 WG1842912 C32-C40 Hydrocarbons ND 4.41 1 04/05/2022 22:02 WG1842912 (S) o-Terphenyl 90.1 18.0-148 04/05/2022 22:02 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7817 of 11211 16 of 54 SAMPLE RESULTS - 04
L1476737
B-4-15
Collected date/time: 03/29/22 09:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 95.5 1 04/01/2022 08:28 WG1841038
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 2.76 25 03/31/2022 16:33 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.9 77.0-120 03/31/2022 16:33 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0552 1 04/02/2022 02:42 WG1842055
Acrylonitrile ND 0.0138 1 04/02/2022 02:42 WG1842055
Benzene ND 0.00110 1 04/02/2022 02:42 WG1842055
Bromobenzene ND 0.0138 1 04/02/2022 02:42 WG1842055
Bromodichloromethane ND 0.00276 1 04/02/2022 02:42 WG1842055 Bromoform ND 0.0276 1 04/02/2022 02:42 WG1842055
Bromomethane ND 0.0138 1 04/02/2022 02:42 WG1842055
n-Butylbenzene ND 0.0138 1 04/02/2022 02:42 WG1842055
sec-Butylbenzene ND 0.0138 1 04/02/2022 02:42 WG1842055 tert-Butylbenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 Carbon tetrachloride ND 0.00552 1 04/02/2022 02:42 WG1842055 Chlorobenzene ND 0.00276 1 04/02/2022 02:42 WG1842055
Chlorodibromomethane ND 0.00276 1 04/02/2022 02:42 WG1842055 Chloroethane ND 0.00552 1 04/02/2022 02:42 WG1842055
Chloroform ND 0.00276 1 04/02/2022 02:42 WG1842055
Chloromethane ND 0.0138 1 04/02/2022 02:42 WG1842055
2-Chlorotoluene ND 0.00276 1 04/02/2022 02:42 WG1842055 4-Chlorotoluene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,2-Dibromo-3-Chloropropane ND 0.0276 1 04/02/2022 02:42 WG1842055 1,2-Dibromoethane ND 0.00276 1 04/02/2022 02:42 WG1842055 Dibromomethane ND 0.00552 1 04/02/2022 02:42 WG1842055
1,2-Dichlorobenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,3-Dichlorobenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,4-Dichlorobenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 Dichlorodifluoromethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,1-Dichloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,2-Dichloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,1-Dichloroethene ND 0.00276 1 04/02/2022 02:42 WG1842055 cis-1,2-Dichloroethene ND 0.00276 1 04/02/2022 02:42 WG1842055 trans-1,2-Dichloroethene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,2-Dichloropropane ND 0.00552 1 04/02/2022 02:42 WG1842055 1,1-Dichloropropene ND 0.00276 1 04/02/2022 02:42 WG1842055 1,3-Dichloropropane ND 0.00552 1 04/02/2022 02:42 WG1842055 cis-1,3-Dichloropropene ND 0.00276 1 04/02/2022 02:42 WG1842055 trans-1,3-Dichloropropene ND 0.00552 1 04/02/2022 02:42 WG1842055 2,2-Dichloropropane ND 0.00276 1 04/02/2022 02:42 WG1842055 Di-isopropyl ether ND 0.00110 1 04/02/2022 02:42 WG1842055 Ethylbenzene ND 0.00276 1 04/02/2022 02:42 WG1842055
Hexachloro-1,3-butadiene ND 0.0276 1 04/02/2022 02:42 WG1842055 Isopropylbenzene ND 0.00276 1 04/02/2022 02:42 WG1842055 p-Isopropyltoluene ND 0.00552 1 04/02/2022 02:42 WG1842055 2-Butanone (MEK) ND 0.110 1 04/02/2022 02:42 WG1842055
Methylene Chloride ND 0.0276 1 04/02/2022 02:42 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0276 1 04/02/2022 02:42 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7818 of 11211 17 of 54 SAMPLE RESULTS - 04
L1476737
B-4-15
Collected date/time: 03/29/22 09:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00110 1 04/02/2022 02:42 WG1842055 Naphthalene ND 0.0138 1 04/02/2022 02:42 WG1842055
n-Propylbenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 Styrene ND 0.0138 1 04/02/2022 02:42 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 Tetrachloroethene ND 0.00276 1 04/02/2022 02:42 WG1842055 Toluene ND 0.00552 1 04/02/2022 02:42 WG1842055
1,2,3-Trichlorobenzene ND 0.0138 1 04/02/2022 02:42 WG1842055 1,2,4-Trichlorobenzene ND 0.0138 1 04/02/2022 02:42 WG1842055 1,1,1-Trichloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,1,2-Trichloroethane ND 0.00276 1 04/02/2022 02:42 WG1842055 Trichloroethene ND 0.00110 1 04/02/2022 02:42 WG1842055 Trichlorofluoromethane ND 0.00276 1 04/02/2022 02:42 WG1842055 1,2,3-Trichloropropane ND 0.0138 1 04/02/2022 02:42 WG1842055 1,2,4-Trimethylbenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,2,3-Trimethylbenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 1,3,5-Trimethylbenzene ND 0.00552 1 04/02/2022 02:42 WG1842055 Vinyl chloride ND 0.00276 1 04/02/2022 02:42 WG1842055
Xylenes, Total ND 0.00718 1 04/02/2022 02:42 WG1842055
(S) Toluene-d8 105 75.0-131 04/02/2022 02:42 WG1842055
(S) 4-Bromofluorobenzene 87.4 67.0-138 04/02/2022 02:42 WG1842055 (S) 1,2-Dichloroethane-d4 94.9 70.0-130 04/02/2022 02:42 WG1842055 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.19 1 04/05/2022 22:53 WG1842912 C22-C32 Hydrocarbons ND 4.19 1 04/05/2022 22:53 WG1842912 C32-C40 Hydrocarbons ND 4.19 1 04/05/2022 22:53 WG1842912 (S) o-Terphenyl 94.1 18.0-148 04/05/2022 22:53 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7819 of 11211 18 of 54 SAMPLE RESULTS - 05
L1476737
B-3-1
Collected date/time: 03/29/22 10:55
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.7 1 04/01/2022 08:28 WG1841038
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.867 0.0432 1 04/06/2022 09:16 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.16 1 04/04/2022 22:56 WG1841018
Arsenic 4.76 2.16 1 04/04/2022 22:56 WG1841018
Barium 157 0.540 1 04/04/2022 22:56 WG1841018
Beryllium 0.315 0.216 1 04/04/2022 22:56 WG1841018
Cadmium ND 0.540 1 04/04/2022 22:56 WG1841018
Chromium 53.2 1.08 1 04/04/2022 22:56 WG1841018
Cobalt 10.8 1.08 1 04/04/2022 22:56 WG1841018
Copper 55.9 2.16 1 04/04/2022 22:56 WG1841018
Lead 37.8 0.540 1 04/04/2022 22:56 WG1841018
Molybdenum ND 0.540 1 04/04/2022 22:56 WG1841018
Nickel 52.1 2.16 1 04/04/2022 22:56 WG1841018
Selenium ND 2.16 1 04/04/2022 22:56 WG1841018
Silver ND 1.08 1 04/04/2022 22:56 WG1841018
Thallium ND 2.16 1 04/04/2022 22:56 WG1841018
Vanadium 57.5 2.16 1 04/04/2022 22:56 WG1841018
Zinc 107 5.40 1 04/04/2022 22:56 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.06 26.5 03/31/2022 16:56 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.1 77.0-120 03/31/2022 16:56 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0612 1.06 04/02/2022 03:02 WG1842055
Acrylonitrile ND 0.0153 1.06 04/02/2022 03:02 WG1842055 Benzene 0.0144 0.00122 1.06 04/02/2022 03:02 WG1842055
Bromobenzene ND 0.0153 1.06 04/02/2022 03:02 WG1842055
Bromodichloromethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Bromoform ND 0.0306 1.06 04/02/2022 03:02 WG1842055
Bromomethane ND 0.0153 1.06 04/02/2022 03:02 WG1842055
n-Butylbenzene ND 0.0153 1.06 04/02/2022 03:02 WG1842055 sec-Butylbenzene ND 0.0153 1.06 04/02/2022 03:02 WG1842055 tert-Butylbenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Carbon tetrachloride ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Chlorobenzene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Chlorodibromomethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Chloroethane ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Chloroform ND 0.00306 1.06 04/02/2022 03:02 WG1842055
Chloromethane ND 0.0153 1.06 04/02/2022 03:02 WG1842055 2-Chlorotoluene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 4-Chlorotoluene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7820 of 11211 19 of 54 SAMPLE RESULTS - 05
L1476737
B-3-1
Collected date/time: 03/29/22 10:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0306 1.06 04/02/2022 03:02 WG1842055 1,2-Dibromoethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Dibromomethane ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,2-Dichlorobenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,3-Dichlorobenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,4-Dichlorobenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Dichlorodifluoromethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,1-Dichloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,2-Dichloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,1-Dichloroethene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 cis-1,2-Dichloroethene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 trans-1,2-Dichloroethene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,2-Dichloropropane ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,1-Dichloropropene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,3-Dichloropropane ND 0.00612 1.06 04/02/2022 03:02 WG1842055 cis-1,3-Dichloropropene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 trans-1,3-Dichloropropene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 2,2-Dichloropropane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Di-isopropyl ether ND 0.00122 1.06 04/02/2022 03:02 WG1842055 Ethylbenzene 0.00502 0.00306 1.06 04/02/2022 03:02 WG1842055 Hexachloro-1,3-butadiene ND 0.0306 1.06 04/02/2022 03:02 WG1842055 Isopropylbenzene ND 0.00306 1.06 04/02/2022 03:02 WG1842055 p-Isopropyltoluene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 2-Butanone (MEK) ND 0.122 1.06 04/02/2022 03:02 WG1842055 Methylene Chloride ND 0.0306 1.06 04/02/2022 03:02 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0306 1.06 04/02/2022 03:02 WG1842055 Methyl tert-butyl ether ND 0.00122 1.06 04/02/2022 03:02 WG1842055 Naphthalene ND 0.0153 1.06 04/02/2022 03:02 WG1842055
n-Propylbenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Styrene ND 0.0153 1.06 04/02/2022 03:02 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Tetrachloroethene 0.0473 0.00306 1.06 04/02/2022 03:02 WG1842055 Toluene 0.0600 0.00612 1.06 04/02/2022 03:02 WG1842055
1,2,3-Trichlorobenzene ND 0.0153 1.06 04/02/2022 03:02 WG1842055 1,2,4-Trichlorobenzene ND 0.0153 1.06 04/02/2022 03:02 WG1842055 1,1,1-Trichloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,1,2-Trichloroethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Trichloroethene ND 0.00122 1.06 04/02/2022 03:02 WG1842055 Trichlorofluoromethane ND 0.00306 1.06 04/02/2022 03:02 WG1842055 1,2,3-Trichloropropane ND 0.0153 1.06 04/02/2022 03:02 WG1842055 1,2,4-Trimethylbenzene 0.0118 0.00612 1.06 04/02/2022 03:02 WG1842055 1,2,3-Trimethylbenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 1,3,5-Trimethylbenzene ND 0.00612 1.06 04/02/2022 03:02 WG1842055 Vinyl chloride ND 0.00306 1.06 04/02/2022 03:02 WG1842055 Xylenes, Total 0.0702 0.00795 1.06 04/02/2022 03:02 WG1842055 (S) Toluene-d8 103 75.0-131 04/02/2022 03:02 WG1842055
(S) 4-Bromofluorobenzene 88.6 67.0-138 04/02/2022 03:02 WG1842055 (S) 1,2-Dichloroethane-d4 99.7 70.0-130 04/02/2022 03:02 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7821 of 11211 20 of 54 SAMPLE RESULTS - 05
L1476737
B-3-1
Collected date/time: 03/29/22 10:55
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons 6.70 4.32 1 04/06/2022 00:18 WG1842912 C22-C32 Hydrocarbons 35.3 4.32 1 04/06/2022 00:18 WG1842912 C32-C40 Hydrocarbons 28.2 4.32 1 04/06/2022 00:18 WG1842912 (S) o-Terphenyl 69.2 18.0-148 04/06/2022 00:18 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7822 of 11211 21 of 54 SAMPLE RESULTS - 06
L1476737
B-3-5
Collected date/time: 03/29/22 11:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 91.7 1 04/01/2022 08:13 WG1841039
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0603 0.0436 1 04/06/2022 09:14 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.18 1 04/04/2022 22:59 WG1841018
Arsenic 4.99 2.18 1 04/04/2022 22:59 WG1841018
Barium 119 0.545 1 04/04/2022 22:59 WG1841018
Beryllium 0.413 0.218 1 04/04/2022 22:59 WG1841018
Cadmium ND 0.545 1 04/04/2022 22:59 WG1841018
Chromium 62.9 1.09 1 04/04/2022 22:59 WG1841018
Cobalt 12.9 1.09 1 04/04/2022 22:59 WG1841018
Copper 22.8 2.18 1 04/04/2022 22:59 WG1841018
Lead 9.99 0.545 1 04/04/2022 22:59 WG1841018
Molybdenum ND 0.545 1 04/04/2022 22:59 WG1841018
Nickel 56.2 2.18 1 04/04/2022 22:59 WG1841018
Selenium ND 2.18 1 04/04/2022 22:59 WG1841018
Silver ND 1.09 1 04/04/2022 22:59 WG1841018
Thallium ND 2.18 1 04/04/2022 22:59 WG1841018
Vanadium 65.5 2.18 1 04/04/2022 22:59 WG1841018
Zinc 55.9 5.45 1 04/04/2022 22:59 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.01 25.5 03/31/2022 17:19 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.3 77.0-120 03/31/2022 17:19 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0602 1.02 04/02/2022 03:21 WG1842055
Acrylonitrile ND 0.0151 1.02 04/02/2022 03:21 WG1842055 Benzene 0.00746 0.00120 1.02 04/02/2022 03:21 WG1842055 Bromobenzene ND 0.0151 1.02 04/02/2022 03:21 WG1842055
Bromodichloromethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Bromoform ND 0.0301 1.02 04/02/2022 03:21 WG1842055
Bromomethane ND 0.0151 1.02 04/02/2022 03:21 WG1842055
n-Butylbenzene ND 0.0151 1.02 04/02/2022 03:21 WG1842055 sec-Butylbenzene ND 0.0151 1.02 04/02/2022 03:21 WG1842055 tert-Butylbenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Carbon tetrachloride ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Chlorobenzene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Chlorodibromomethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Chloroethane ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Chloroform ND 0.00301 1.02 04/02/2022 03:21 WG1842055
Chloromethane ND 0.0151 1.02 04/02/2022 03:21 WG1842055 2-Chlorotoluene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 4-Chlorotoluene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 22 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7823 of 11211 22 of 54 SAMPLE RESULTS - 06
L1476737
B-3-5
Collected date/time: 03/29/22 11:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0301 1.02 04/02/2022 03:21 WG1842055 1,2-Dibromoethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Dibromomethane ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,2-Dichlorobenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,3-Dichlorobenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,4-Dichlorobenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Dichlorodifluoromethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,1-Dichloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,2-Dichloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,1-Dichloroethene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 cis-1,2-Dichloroethene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 trans-1,2-Dichloroethene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,2-Dichloropropane ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,1-Dichloropropene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,3-Dichloropropane ND 0.00602 1.02 04/02/2022 03:21 WG1842055 cis-1,3-Dichloropropene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 trans-1,3-Dichloropropene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 2,2-Dichloropropane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Di-isopropyl ether ND 0.00120 1.02 04/02/2022 03:21 WG1842055 Ethylbenzene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Hexachloro-1,3-butadiene ND 0.0301 1.02 04/02/2022 03:21 WG1842055 Isopropylbenzene ND 0.00301 1.02 04/02/2022 03:21 WG1842055 p-Isopropyltoluene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 2-Butanone (MEK) ND 0.120 1.02 04/02/2022 03:21 WG1842055 Methylene Chloride ND 0.0301 1.02 04/02/2022 03:21 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0301 1.02 04/02/2022 03:21 WG1842055 Methyl tert-butyl ether ND 0.00120 1.02 04/02/2022 03:21 WG1842055 Naphthalene ND 0.0151 1.02 04/02/2022 03:21 WG1842055
n-Propylbenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Styrene ND 0.0151 1.02 04/02/2022 03:21 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Tetrachloroethene 0.00427 0.00301 1.02 04/02/2022 03:21 WG1842055 Toluene 0.0310 0.00602 1.02 04/02/2022 03:21 WG1842055
1,2,3-Trichlorobenzene ND 0.0151 1.02 04/02/2022 03:21 WG1842055 1,2,4-Trichlorobenzene ND 0.0151 1.02 04/02/2022 03:21 WG1842055 1,1,1-Trichloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,1,2-Trichloroethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Trichloroethene ND 0.00120 1.02 04/02/2022 03:21 WG1842055 Trichlorofluoromethane ND 0.00301 1.02 04/02/2022 03:21 WG1842055 1,2,3-Trichloropropane ND 0.0151 1.02 04/02/2022 03:21 WG1842055 1,2,4-Trimethylbenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,2,3-Trimethylbenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 1,3,5-Trimethylbenzene ND 0.00602 1.02 04/02/2022 03:21 WG1842055 Vinyl chloride ND 0.00301 1.02 04/02/2022 03:21 WG1842055 Xylenes, Total 0.0308 0.00782 1.02 04/02/2022 03:21 WG1842055 (S) Toluene-d8 105 75.0-131 04/02/2022 03:21 WG1842055
(S) 4-Bromofluorobenzene 87.7 67.0-138 04/02/2022 03:21 WG1842055 (S) 1,2-Dichloroethane-d4 95.9 70.0-130 04/02/2022 03:21 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 23 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7824 of 11211 23 of 54 SAMPLE RESULTS - 06
L1476737
B-3-5
Collected date/time: 03/29/22 11:00
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.36 1 04/06/2022 00:01 WG1842912 C22-C32 Hydrocarbons 15.9 4.36 1 04/06/2022 00:01 WG1842912 C32-C40 Hydrocarbons 13.5 4.36 1 04/06/2022 00:01 WG1842912 (S) o-Terphenyl 78.3 18.0-148 04/06/2022 00:01 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 24 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7825 of 11211 24 of 54 SAMPLE RESULTS - 07
L1476737
B-3-10
Collected date/time: 03/29/22 11:05
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 90.1 1 04/01/2022 08:13 WG1841039
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.07 25 03/31/2022 17:42 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.4 77.0-120 03/31/2022 17:42 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0613 1 04/02/2022 03:41 WG1842055
Acrylonitrile ND 0.0153 1 04/02/2022 03:41 WG1842055
Benzene ND 0.00123 1 04/02/2022 03:41 WG1842055
Bromobenzene ND 0.0153 1 04/02/2022 03:41 WG1842055
Bromodichloromethane ND 0.00307 1 04/02/2022 03:41 WG1842055 Bromoform ND 0.0307 1 04/02/2022 03:41 WG1842055
Bromomethane ND 0.0153 1 04/02/2022 03:41 WG1842055
n-Butylbenzene ND 0.0153 1 04/02/2022 03:41 WG1842055
sec-Butylbenzene ND 0.0153 1 04/02/2022 03:41 WG1842055 tert-Butylbenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 Carbon tetrachloride ND 0.00613 1 04/02/2022 03:41 WG1842055 Chlorobenzene ND 0.00307 1 04/02/2022 03:41 WG1842055
Chlorodibromomethane ND 0.00307 1 04/02/2022 03:41 WG1842055 Chloroethane ND 0.00613 1 04/02/2022 03:41 WG1842055
Chloroform ND 0.00307 1 04/02/2022 03:41 WG1842055
Chloromethane ND 0.0153 1 04/02/2022 03:41 WG1842055
2-Chlorotoluene ND 0.00307 1 04/02/2022 03:41 WG1842055 4-Chlorotoluene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,2-Dibromo-3-Chloropropane ND 0.0307 1 04/02/2022 03:41 WG1842055 1,2-Dibromoethane ND 0.00307 1 04/02/2022 03:41 WG1842055 Dibromomethane ND 0.00613 1 04/02/2022 03:41 WG1842055
1,2-Dichlorobenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,3-Dichlorobenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,4-Dichlorobenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 Dichlorodifluoromethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,1-Dichloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,2-Dichloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,1-Dichloroethene ND 0.00307 1 04/02/2022 03:41 WG1842055 cis-1,2-Dichloroethene ND 0.00307 1 04/02/2022 03:41 WG1842055 trans-1,2-Dichloroethene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,2-Dichloropropane ND 0.00613 1 04/02/2022 03:41 WG1842055 1,1-Dichloropropene ND 0.00307 1 04/02/2022 03:41 WG1842055 1,3-Dichloropropane ND 0.00613 1 04/02/2022 03:41 WG1842055 cis-1,3-Dichloropropene ND 0.00307 1 04/02/2022 03:41 WG1842055 trans-1,3-Dichloropropene ND 0.00613 1 04/02/2022 03:41 WG1842055 2,2-Dichloropropane ND 0.00307 1 04/02/2022 03:41 WG1842055 Di-isopropyl ether ND 0.00123 1 04/02/2022 03:41 WG1842055 Ethylbenzene ND 0.00307 1 04/02/2022 03:41 WG1842055
Hexachloro-1,3-butadiene ND 0.0307 1 04/02/2022 03:41 WG1842055 Isopropylbenzene ND 0.00307 1 04/02/2022 03:41 WG1842055 p-Isopropyltoluene ND 0.00613 1 04/02/2022 03:41 WG1842055 2-Butanone (MEK) ND 0.123 1 04/02/2022 03:41 WG1842055
Methylene Chloride ND 0.0307 1 04/02/2022 03:41 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0307 1 04/02/2022 03:41 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 25 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7826 of 11211 25 of 54 SAMPLE RESULTS - 07
L1476737
B-3-10
Collected date/time: 03/29/22 11:05
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00123 1 04/02/2022 03:41 WG1842055 Naphthalene ND 0.0153 1 04/02/2022 03:41 WG1842055
n-Propylbenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 Styrene ND 0.0153 1 04/02/2022 03:41 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 Tetrachloroethene 0.0167 0.00307 1 04/02/2022 03:41 WG1842055 Toluene ND 0.00613 1 04/02/2022 03:41 WG1842055
1,2,3-Trichlorobenzene ND 0.0153 1 04/02/2022 03:41 WG1842055 1,2,4-Trichlorobenzene ND 0.0153 1 04/02/2022 03:41 WG1842055 1,1,1-Trichloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,1,2-Trichloroethane ND 0.00307 1 04/02/2022 03:41 WG1842055 Trichloroethene ND 0.00123 1 04/02/2022 03:41 WG1842055 Trichlorofluoromethane ND 0.00307 1 04/02/2022 03:41 WG1842055 1,2,3-Trichloropropane ND 0.0153 1 04/02/2022 03:41 WG1842055 1,2,4-Trimethylbenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,2,3-Trimethylbenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 1,3,5-Trimethylbenzene ND 0.00613 1 04/02/2022 03:41 WG1842055 Vinyl chloride ND 0.00307 1 04/02/2022 03:41 WG1842055
Xylenes, Total ND 0.00797 1 04/02/2022 03:41 WG1842055
(S) Toluene-d8 105 75.0-131 04/02/2022 03:41 WG1842055
(S) 4-Bromofluorobenzene 88.2 67.0-138 04/02/2022 03:41 WG1842055 (S) 1,2-Dichloroethane-d4 96.4 70.0-130 04/02/2022 03:41 WG1842055 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.44 1 04/05/2022 23:10 WG1842912 C22-C32 Hydrocarbons ND 4.44 1 04/05/2022 23:10 WG1842912 C32-C40 Hydrocarbons ND 4.44 1 04/05/2022 23:10 WG1842912 (S) o-Terphenyl 85.9 18.0-148 04/05/2022 23:10 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 26 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7827 of 11211 26 of 54 SAMPLE RESULTS - 08
L1476737
B-3-15
Collected date/time: 03/29/22 11:10
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 94.1 1 04/01/2022 08:13 WG1841039
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 2.86 25 03/31/2022 18:05 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.6 77.0-120 03/31/2022 18:05 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0571 1 04/02/2022 04:00 WG1842055
Acrylonitrile ND 0.0143 1 04/02/2022 04:00 WG1842055
Benzene ND 0.00114 1 04/02/2022 04:00 WG1842055
Bromobenzene ND 0.0143 1 04/02/2022 04:00 WG1842055
Bromodichloromethane ND 0.00286 1 04/02/2022 04:00 WG1842055 Bromoform ND 0.0286 1 04/02/2022 04:00 WG1842055
Bromomethane ND 0.0143 1 04/02/2022 04:00 WG1842055
n-Butylbenzene ND 0.0143 1 04/02/2022 04:00 WG1842055
sec-Butylbenzene ND 0.0143 1 04/02/2022 04:00 WG1842055 tert-Butylbenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 Carbon tetrachloride ND 0.00571 1 04/02/2022 04:00 WG1842055 Chlorobenzene ND 0.00286 1 04/02/2022 04:00 WG1842055
Chlorodibromomethane ND 0.00286 1 04/02/2022 04:00 WG1842055 Chloroethane ND 0.00571 1 04/02/2022 04:00 WG1842055
Chloroform ND 0.00286 1 04/02/2022 04:00 WG1842055
Chloromethane ND 0.0143 1 04/02/2022 04:00 WG1842055
2-Chlorotoluene ND 0.00286 1 04/02/2022 04:00 WG1842055 4-Chlorotoluene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,2-Dibromo-3-Chloropropane ND 0.0286 1 04/02/2022 04:00 WG1842055 1,2-Dibromoethane ND 0.00286 1 04/02/2022 04:00 WG1842055 Dibromomethane ND 0.00571 1 04/02/2022 04:00 WG1842055
1,2-Dichlorobenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,3-Dichlorobenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,4-Dichlorobenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 Dichlorodifluoromethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,1-Dichloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,2-Dichloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,1-Dichloroethene ND 0.00286 1 04/02/2022 04:00 WG1842055 cis-1,2-Dichloroethene ND 0.00286 1 04/02/2022 04:00 WG1842055 trans-1,2-Dichloroethene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,2-Dichloropropane ND 0.00571 1 04/02/2022 04:00 WG1842055 1,1-Dichloropropene ND 0.00286 1 04/02/2022 04:00 WG1842055 1,3-Dichloropropane ND 0.00571 1 04/02/2022 04:00 WG1842055 cis-1,3-Dichloropropene ND 0.00286 1 04/02/2022 04:00 WG1842055 trans-1,3-Dichloropropene ND 0.00571 1 04/02/2022 04:00 WG1842055 2,2-Dichloropropane ND 0.00286 1 04/02/2022 04:00 WG1842055 Di-isopropyl ether ND 0.00114 1 04/02/2022 04:00 WG1842055 Ethylbenzene ND 0.00286 1 04/02/2022 04:00 WG1842055
Hexachloro-1,3-butadiene ND 0.0286 1 04/02/2022 04:00 WG1842055 Isopropylbenzene ND 0.00286 1 04/02/2022 04:00 WG1842055 p-Isopropyltoluene ND 0.00571 1 04/02/2022 04:00 WG1842055 2-Butanone (MEK) ND 0.114 1 04/02/2022 04:00 WG1842055
Methylene Chloride ND 0.0286 1 04/02/2022 04:00 WG1842055 4-Methyl-2-pentanone (MIBK) ND 0.0286 1 04/02/2022 04:00 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 27 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7828 of 11211 27 of 54 SAMPLE RESULTS - 08
L1476737
B-3-15
Collected date/time: 03/29/22 11:10
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00114 1 04/02/2022 04:00 WG1842055 Naphthalene ND 0.0143 1 04/02/2022 04:00 WG1842055
n-Propylbenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 Styrene ND 0.0143 1 04/02/2022 04:00 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 Tetrachloroethene 0.00811 0.00286 1 04/02/2022 04:00 WG1842055 Toluene ND 0.00571 1 04/02/2022 04:00 WG1842055
1,2,3-Trichlorobenzene ND 0.0143 1 04/02/2022 04:00 WG1842055 1,2,4-Trichlorobenzene ND 0.0143 1 04/02/2022 04:00 WG1842055 1,1,1-Trichloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,1,2-Trichloroethane ND 0.00286 1 04/02/2022 04:00 WG1842055 Trichloroethene ND 0.00114 1 04/02/2022 04:00 WG1842055 Trichlorofluoromethane ND 0.00286 1 04/02/2022 04:00 WG1842055 1,2,3-Trichloropropane ND 0.0143 1 04/02/2022 04:00 WG1842055 1,2,4-Trimethylbenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,2,3-Trimethylbenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 1,3,5-Trimethylbenzene ND 0.00571 1 04/02/2022 04:00 WG1842055 Vinyl chloride ND 0.00286 1 04/02/2022 04:00 WG1842055
Xylenes, Total ND 0.00743 1 04/02/2022 04:00 WG1842055
(S) Toluene-d8 104 75.0-131 04/02/2022 04:00 WG1842055
(S) 4-Bromofluorobenzene 87.8 67.0-138 04/02/2022 04:00 WG1842055 (S) 1,2-Dichloroethane-d4 96.1 70.0-130 04/02/2022 04:00 WG1842055 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.25 1 04/05/2022 23:27 WG1842912 C22-C32 Hydrocarbons ND 4.25 1 04/05/2022 23:27 WG1842912 C32-C40 Hydrocarbons ND 4.25 1 04/05/2022 23:27 WG1842912 (S) o-Terphenyl 87.6 18.0-148 04/05/2022 23:27 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:23 28 of 54 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7829 of 11211 28 of 54 SAMPLE RESULTS - 09
L1476737
B-2-1
Collected date/time: 03/29/22 13:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.5 1 04/01/2022 08:13 WG1841039
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.599 0.0432 1 04/06/2022 09:11 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.16 1 04/04/2022 23:02 WG1841018
Arsenic 12.5 2.16 1 04/04/2022 23:02 WG1841018
Barium 213 0.540 1 04/04/2022 23:02 WG1841018
Beryllium 0.308 0.216 1 04/04/2022 23:02 WG1841018
Cadmium 0.647 0.540 1 04/04/2022 23:02 WG1841018
Chromium 49.0 1.08 1 04/04/2022 23:02 WG1841018
Cobalt 10.8 1.08 1 04/04/2022 23:02 WG1841018
Copper 74.3 2.16 1 04/04/2022 23:02 WG1841018
Lead 144 0.540 1 04/04/2022 23:02 WG1841018
Molybdenum 0.603 0.540 1 04/04/2022 23:02 WG1841018
Nickel 51.3 2.16 1 04/04/2022 23:02 WG1841018
Selenium ND 2.16 1 04/04/2022 23:02 WG1841018
Silver ND 1.08 1 04/04/2022 23:02 WG1841018
Thallium ND 2.16 1 04/04/2022 23:02 WG1841018
Vanadium 57.1 2.16 1 04/04/2022 23:02 WG1841018
Zinc 165 5.40 1 04/04/2022 23:02 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 3.16 B 2.94 25.3 03/31/2022 18:28 WG1840999 (S) a,a,a-Trifluorotoluene(FID) 96.8 77.0-120 03/31/2022 18:28 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0586 1.01 04/02/2022 04:20 WG1842055
Acrylonitrile ND 0.0146 1.01 04/02/2022 04:20 WG1842055 Benzene 0.00402 0.00117 1.01 04/02/2022 04:20 WG1842055 Bromobenzene ND 0.0146 1.01 04/02/2022 04:20 WG1842055
Bromodichloromethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Bromoform ND 0.0294 1.01 04/02/2022 04:20 WG1842055
Bromomethane ND 0.0146 1.01 04/02/2022 04:20 WG1842055
n-Butylbenzene ND 0.0146 1.01 04/02/2022 04:20 WG1842055 sec-Butylbenzene ND 0.0146 1.01 04/02/2022 04:20 WG1842055 tert-Butylbenzene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 Carbon tetrachloride ND 0.00586 1.01 04/02/2022 04:20 WG1842055 Chlorobenzene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Chlorodibromomethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Chloroethane ND 0.00586 1.01 04/02/2022 04:20 WG1842055 Chloroform ND 0.00294 1.01 04/02/2022 04:20 WG1842055
Chloromethane ND 0.0146 1.01 04/02/2022 04:20 WG1842055 2-Chlorotoluene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 4-Chlorotoluene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7830 of 11211 29 of 54 SAMPLE RESULTS - 09
L1476737
B-2-1
Collected date/time: 03/29/22 13:15
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0294 1.01 04/02/2022 04:20 WG1842055 1,2-Dibromoethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Dibromomethane ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1,2-Dichlorobenzene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1,3-Dichlorobenzene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1,4-Dichlorobenzene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 Dichlorodifluoromethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,1-Dichloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,2-Dichloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,1-Dichloroethene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 cis-1,2-Dichloroethene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 trans-1,2-Dichloroethene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1,2-Dichloropropane ND 0.00586 1.01 04/02/2022 04:20 WG1842055 1,1-Dichloropropene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,3-Dichloropropane ND 0.00586 1.01 04/02/2022 04:20 WG1842055 cis-1,3-Dichloropropene ND 0.00294 1.01 04/02/2022 04:20 WG1842055 trans-1,3-Dichloropropene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 2,2-Dichloropropane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Di-isopropyl ether ND 0.00117 1.01 04/02/2022 04:20 WG1842055 Ethylbenzene 0.00542 0.00294 1.01 04/02/2022 04:20 WG1842055 Hexachloro-1,3-butadiene ND 0.0294 1.01 04/02/2022 04:20 WG1842055 Isopropylbenzene 0.00337 0.00294 1.01 04/02/2022 04:20 WG1842055 p-Isopropyltoluene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 2-Butanone (MEK) 0.123 0.117 1.01 04/02/2022 04:20 WG1842055 Methylene Chloride ND 0.0294 1.01 04/02/2022 04:20 WG1842055 4-Methyl-2-pentanone (MIBK) 0.0351 0.0294 1.01 04/02/2022 04:20 WG1842055 Methyl tert-butyl ether ND 0.00117 1.01 04/02/2022 04:20 WG1842055 Naphthalene 0.0385 0.0146 1.01 04/02/2022 04:20 WG1842055 n-Propylbenzene ND 0.00586 1.01 04/02/2022 04:20 WG1842055 Styrene ND 0.0146 1.01 04/02/2022 04:20 WG1842055
1,1,1,2-Tetrachloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,1,2,2-Tetrachloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,1,2-Trichlorotrifluoroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Tetrachloroethene 0.301 0.00294 1.01 04/02/2022 04:20 WG1842055 Toluene 0.0270 0.00586 1.01 04/02/2022 04:20 WG1842055
1,2,3-Trichlorobenzene ND 0.0146 1.01 04/02/2022 04:20 WG1842055 1,2,4-Trichlorobenzene ND 0.0146 1.01 04/02/2022 04:20 WG1842055 1,1,1-Trichloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,1,2-Trichloroethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Trichloroethene 0.00127 0.00117 1.01 04/02/2022 04:20 WG1842055 Trichlorofluoromethane ND 0.00294 1.01 04/02/2022 04:20 WG1842055 1,2,3-Trichloropropane ND 0.0146 1.01 04/02/2022 04:20 WG1842055 1,2,4-Trimethylbenzene 0.0251 0.00586 1.01 04/02/2022 04:20 WG1842055 1,2,3-Trimethylbenzene 0.0217 0.00586 1.01 04/02/2022 04:20 WG1842055 1,3,5-Trimethylbenzene 0.00786 0.00586 1.01 04/02/2022 04:20 WG1842055 Vinyl chloride ND 0.00294 1.01 04/02/2022 04:20 WG1842055 Xylenes, Total 0.0634 0.00761 1.01 04/02/2022 04:20 WG1842055 (S) Toluene-d8 106 75.0-131 04/02/2022 04:20 WG1842055
(S) 4-Bromofluorobenzene 90.2 67.0-138 04/02/2022 04:20 WG1842055 (S) 1,2-Dichloroethane-d4 99.2 70.0-130 04/02/2022 04:20 WG1842055 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7831 of 11211 30 of 54 SAMPLE RESULTS - 09
L1476737
B-2-1
Collected date/time: 03/29/22 13:15
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons 70.7 8.65 2 04/06/2022 00:35 WG1842912 C22-C32 Hydrocarbons 222 8.65 2 04/06/2022 00:35 WG1842912 C32-C40 Hydrocarbons 158 8.65 2 04/06/2022 00:35 WG1842912 (S) o-Terphenyl 76.9 18.0-148 04/06/2022 00:35 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7832 of 11211 31 of 54 SAMPLE RESULTS - 10
L1476737
B-2-5
Collected date/time: 03/29/22 13:20
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.4 1 04/01/2022 08:13 WG1841039
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury ND 0.0433 1 04/06/2022 09:09 WG1841078
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.17 1 04/04/2022 23:05 WG1841018
Arsenic 2.77 2.17 1 04/04/2022 23:05 WG1841018
Barium 127 0.541 1 04/04/2022 23:05 WG1841018
Beryllium 0.320 0.217 1 04/04/2022 23:05 WG1841018
Cadmium ND 0.541 1 04/04/2022 23:05 WG1841018
Chromium 54.2 1.08 1 04/04/2022 23:05 WG1841018
Cobalt 11.3 1.08 1 04/04/2022 23:05 WG1841018
Copper 18.6 2.17 1 04/04/2022 23:05 WG1841018
Lead 6.88 0.541 1 04/04/2022 23:05 WG1841018
Molybdenum ND 0.541 1 04/04/2022 23:05 WG1841018
Nickel 50.0 2.17 1 04/04/2022 23:05 WG1841018
Selenium ND 2.17 1 04/04/2022 23:05 WG1841018
Silver ND 1.08 1 04/04/2022 23:05 WG1841018
Thallium ND 2.17 1 04/04/2022 23:05 WG1841018
Vanadium 58.7 2.17 1 04/04/2022 23:05 WG1841018
Zinc 49.2 5.41 1 04/04/2022 23:05 WG1841018
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.00 25.8 03/31/2022 18:51 WG1840999
(S) a,a,a-Trifluorotoluene(FID) 97.2 77.0-120 03/31/2022 18:51 WG1840999 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0599 1.03 04/03/2022 01:12 WG1842238
Acrylonitrile ND 0.0150 1.03 04/03/2022 01:12 WG1842238 Benzene ND 0.00120 1.03 04/03/2022 01:12 WG1842238
Bromobenzene ND 0.0150 1.03 04/03/2022 01:12 WG1842238
Bromodichloromethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Bromoform ND J4 0.0300 1.03 04/03/2022 01:12 WG1842238
Bromomethane ND 0.0150 1.03 04/03/2022 01:12 WG1842238
n-Butylbenzene ND 0.0150 1.03 04/03/2022 01:12 WG1842238 sec-Butylbenzene ND 0.0150 1.03 04/03/2022 01:12 WG1842238 tert-Butylbenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Carbon tetrachloride ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Chlorobenzene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Chlorodibromomethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Chloroethane ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Chloroform ND 0.00300 1.03 04/03/2022 01:12 WG1842238
Chloromethane ND 0.0150 1.03 04/03/2022 01:12 WG1842238 2-Chlorotoluene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 4-Chlorotoluene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7833 of 11211 32 of 54 SAMPLE RESULTS - 10
L1476737
B-2-5
Collected date/time: 03/29/22 13:20
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0300 1.03 04/03/2022 01:12 WG1842238 1,2-Dibromoethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Dibromomethane ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,2-Dichlorobenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,3-Dichlorobenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,4-Dichlorobenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Dichlorodifluoromethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,1-Dichloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,2-Dichloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,1-Dichloroethene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 cis-1,2-Dichloroethene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 trans-1,2-Dichloroethene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,2-Dichloropropane ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,1-Dichloropropene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,3-Dichloropropane ND 0.00599 1.03 04/03/2022 01:12 WG1842238 cis-1,3-Dichloropropene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 trans-1,3-Dichloropropene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 2,2-Dichloropropane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Di-isopropyl ether ND 0.00120 1.03 04/03/2022 01:12 WG1842238 Ethylbenzene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Hexachloro-1,3-butadiene ND 0.0300 1.03 04/03/2022 01:12 WG1842238 Isopropylbenzene ND 0.00300 1.03 04/03/2022 01:12 WG1842238 p-Isopropyltoluene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 2-Butanone (MEK) 0.124 0.120 1.03 04/03/2022 01:12 WG1842238 Methylene Chloride ND 0.0300 1.03 04/03/2022 01:12 WG1842238 4-Methyl-2-pentanone (MIBK) ND 0.0300 1.03 04/03/2022 01:12 WG1842238 Methyl tert-butyl ether ND 0.00120 1.03 04/03/2022 01:12 WG1842238 Naphthalene ND 0.0150 1.03 04/03/2022 01:12 WG1842238
n-Propylbenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Styrene ND 0.0150 1.03 04/03/2022 01:12 WG1842238
1,1,1,2-Tetrachloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,1,2,2-Tetrachloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,1,2-Trichlorotrifluoroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Tetrachloroethene 0.00650 0.00300 1.03 04/03/2022 01:12 WG1842238 Toluene ND 0.00599 1.03 04/03/2022 01:12 WG1842238
1,2,3-Trichlorobenzene ND 0.0150 1.03 04/03/2022 01:12 WG1842238 1,2,4-Trichlorobenzene ND 0.0150 1.03 04/03/2022 01:12 WG1842238 1,1,1-Trichloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,1,2-Trichloroethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Trichloroethene ND 0.00120 1.03 04/03/2022 01:12 WG1842238 Trichlorofluoromethane ND 0.00300 1.03 04/03/2022 01:12 WG1842238 1,2,3-Trichloropropane ND 0.0150 1.03 04/03/2022 01:12 WG1842238 1,2,4-Trimethylbenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,2,3-Trimethylbenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 1,3,5-Trimethylbenzene ND 0.00599 1.03 04/03/2022 01:12 WG1842238 Vinyl chloride ND 0.00300 1.03 04/03/2022 01:12 WG1842238 Xylenes, Total ND 0.00779 1.03 04/03/2022 01:12 WG1842238 (S) Toluene-d8 106 75.0-131 04/03/2022 01:12 WG1842238
(S) 4-Bromofluorobenzene 86.8 67.0-138 04/03/2022 01:12 WG1842238 (S) 1,2-Dichloroethane-d4 96.2 70.0-130 04/03/2022 01:12 WG1842238 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7834 of 11211 33 of 54 SAMPLE RESULTS - 10
L1476737
B-2-5
Collected date/time: 03/29/22 13:20
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.33 1 04/05/2022 23:44 WG1842912 C22-C32 Hydrocarbons 12.9 4.33 1 04/05/2022 23:44 WG1842912 C32-C40 Hydrocarbons 13.1 4.33 1 04/05/2022 23:44 WG1842912 (S) o-Terphenyl 90.6 18.0-148 04/05/2022 23:44 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7835 of 11211 34 of 54 WG1841038 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1476737-01,02,03,04,05 Method Blank (MB)
(MB) R3776816-1 04/01/22 08:28
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00300
L1476737-04 Original Sample (OS) • Duplicate (DUP)
(OS) L1476737-04 04/01/22 08:28 • (DUP) R3776816-3 04/01/22 08:28 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 95.5 93.5 1 2.07 10
Laboratory Control Sample (LCS)
(LCS) R3776816-2 04/01/22 08:28
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte % % % %
Total Solids 50.0 50.0 99.9 85.0-115
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7836 of 11211 35 of 54 WG1841039 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1476737-06,07,08,09,10 Method Blank (MB)
(MB) R3776815-1 04/01/22 08:13
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00200
L1476747-03 Original Sample (OS) • Duplicate (DUP)
(OS) L1476747-03 04/01/22 08:13 • (DUP) R3776815-3 04/01/22 08:13 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 78.8 81.1 1 2.81 10
Laboratory Control Sample (LCS)
(LCS) R3776815-2 04/01/22 08:13
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte % % % %
Total Solids 50.0 49.9 99.9 85.0-115
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7837 of 11211 36 of 54 WG1841078 QUALITY CONTROL SUMMARY
Mercury by Method 7471A L1476737-01,02,05,06,09,10
Method Blank (MB)
(MB) R3778258-4 04/06/22 09:40
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Mercury U 0.0180 0.0400
Laboratory Control Sample (LCS)
(LCS) R3778258-3 04/06/22 09:38
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Mercury 0.500 0.540 108 80.0-120
L1476788-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476788-01 04/06/22 09:35 • (MS) R3778258-2 04/06/22 09:33 • (MSD) R3778258-1 04/06/22 09:30 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Mercury 0.521 ND 0.560 0.506 108 97.2 1 75.0-125 10.2 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1476737-01,02,05,06,09,10 Method Blank (MB)
(MB) R3777513-1 04/04/22 22:09
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Antimony U 0.544 2.00
Arsenic U 0.518 2.00
Barium U 0.0852 0.500
Beryllium U 0.0315 0.200
Cadmium U 0.0471 0.500
Chromium U 0.133 1.00
Cobalt U 0.0811 1.00
Copper U 0.400 2.00
Lead U 0.208 0.500
Molybdenum U 0.109 0.500
Nickel U 0.132 2.00
Selenium U 0.764 2.00
Silver U 0.127 1.00
Thallium U 0.394 2.00
Vanadium U 0.506 2.00
Zinc U 0.832 5.00
Laboratory Control Sample (LCS)
(LCS) R3777513-2 04/04/22 22:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Antimony 100 88.8 88.8 80.0-120
Arsenic 100 87.4 87.4 80.0-120
Barium 100 91.8 91.8 80.0-120
Beryllium 100 89.2 89.2 80.0-120
Cadmium 100 87.9 87.9 80.0-120
Chromium 100 90.7 90.7 80.0-120
Cobalt 100 91.7 91.7 80.0-120
Copper 100 90.6 90.6 80.0-120
Lead 100 89.9 89.9 80.0-120
Molybdenum 100 95.1 95.1 80.0-120
Nickel 100 89.9 89.9 80.0-120
Selenium 100 88.9 88.9 80.0-120
Silver 20.0 18.3 91.5 80.0-120
Thallium 100 89.3 89.3 80.0-120
Vanadium 100 89.3 89.3 80.0-120
Zinc 100 89.1 89.1 80.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1476737-01,02,05,06,09,10 L1476766-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476766-01 04/04/22 22:14 • (MS) R3777513-5 04/04/22 22:23 • (MSD) R3777513-6 04/04/22 22:26 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Antimony 100 ND 64.3 64.7 64.3 64.7 1 75.0-125 J6 J6 0.635 20 Arsenic 100 11.9 104 105 92.5 93.4 1 75.0-125 0.922 20
Barium 100 88.3 190 181 102 93.2 1 75.0-125 4.56 20
Beryllium 100 0.443 93.7 93.3 93.2 92.9 1 75.0-125 0.388 20 Cadmium 100 ND 93.0 93.0 92.9 92.9 1 75.0-125 0.00655 20 Chromium 100 17.2 112 112 94.4 94.7 1 75.0-125 0.255 20 Cobalt 100 4.57 102 101 97.2 96.8 1 75.0-125 0.438 20
Copper 100 4000 4250 3990 246 0.000 1 75.0-125 V V 6.33 20 Lead 100 1.92 96.4 96.4 94.5 94.4 1 75.0-125 0.0521 20
Molybdenum 100 48.4 147 145 98.1 96.1 1 75.0-125 1.36 20 Nickel 100 11.7 106 106 94.3 93.9 1 75.0-125 0.342 20
Selenium 100 ND 97.0 97.6 97.0 97.6 1 75.0-125 0.648 20 Silver 20.0 ND 19.0 19.1 95.2 95.7 1 75.0-125 0.566 20
Thallium 100 ND 93.5 92.6 93.5 92.6 1 75.0-125 0.948 20 Vanadium 100 5.57 98.7 98.4 93.1 92.8 1 75.0-125 0.282 20 Zinc 100 14.7 108 108 93.4 93.1 1 75.0-125 0.314 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC) by Method 8015 L1476737-01,02,03,04,05,06,07,08,09,10 Method Blank (MB)
(MB) R3776349-2 03/31/22 12:29
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
TPHG C5 - C12 1.20 J 0.830 2.50
(S)
a,a,a-Trifluorotoluene(FID) 96.9 77.0-120
Laboratory Control Sample (LCS)
(LCS) R3776349-1 03/31/22 11:43
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
TPHG C5 - C12 5.50 6.73 122 72.0-125
(S)
a,a,a-Trifluorotoluene(FID) 108 77.0-120
L1476312-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476312-01 03/31/22 15:00 • (MS) R3776349-3 03/31/22 21:55 • (MSD) R3776349-4 03/31/22 22:18 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
TPHG C5 - C12 205 ND 211 201 103 98.2 25 10.0-141 4.52 29 (S)
a,a,a-Trifluorotoluene(FID) 106 106 77.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-01,02,03,04,05,06,07,08,09 Method Blank (MB)
(MB) R3777182-2 04/01/22 21:40
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acetone U 0.0365 0.0500
Acrylonitrile U 0.00361 0.0125
Benzene U 0.000467 0.00100
Bromobenzene U 0.000900 0.0125
Bromodichloromethane U 0.000725 0.00250
Bromoform U 0.00117 0.0250
Bromomethane U 0.00197 0.0125
n-Butylbenzene U 0.00525 0.0125
sec-Butylbenzene U 0.00288 0.0125
tert-Butylbenzene U 0.00195 0.00500
Carbon tetrachloride U 0.000898 0.00500
Chlorobenzene U 0.000210 0.00250
Chlorodibromomethane U 0.000612 0.00250
Chloroethane U 0.00170 0.00500
Chloroform U 0.00103 0.00250
Chloromethane U 0.00435 0.0125
2-Chlorotoluene U 0.000865 0.00250
4-Chlorotoluene U 0.000450 0.00500
1,2-Dibromo-3-Chloropropane U 0.00390 0.0250
1,2-Dibromoethane U 0.000648 0.00250
Dibromomethane U 0.000750 0.00500
1,2-Dichlorobenzene U 0.000425 0.00500
1,3-Dichlorobenzene U 0.000600 0.00500
1,4-Dichlorobenzene U 0.000700 0.00500
Dichlorodifluoromethane U 0.00161 0.00250
1,1-Dichloroethane U 0.000491 0.00250
1,2-Dichloroethane U 0.000649 0.00250
1,1-Dichloroethene U 0.000606 0.00250
cis-1,2-Dichloroethene U 0.000734 0.00250
trans-1,2-Dichloroethene U 0.00104 0.00500
1,2-Dichloropropane U 0.00142 0.00500
1,1-Dichloropropene U 0.000809 0.00250
1,3-Dichloropropane U 0.000501 0.00500
cis-1,3-Dichloropropene U 0.000757 0.00250
trans-1,3-Dichloropropene U 0.00114 0.00500
2,2-Dichloropropane U 0.00138 0.00250
Di-isopropyl ether U 0.000410 0.00100
Ethylbenzene U 0.000737 0.00250
Hexachloro-1,3-butadiene U 0.00600 0.0250
Isopropylbenzene U 0.000425 0.00250
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-01,02,03,04,05,06,07,08,09 Method Blank (MB)
(MB) R3777182-2 04/01/22 21:40
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
p-Isopropyltoluene U 0.00255 0.00500
2-Butanone (MEK) U 0.0635 0.100
Methylene Chloride U 0.00664 0.0250
4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250
Methyl tert-butyl ether U 0.000350 0.00100
Naphthalene U 0.00488 0.0125
n-Propylbenzene U 0.000950 0.00500
Styrene U 0.000229 0.0125
1,1,1,2-Tetrachloroethane U 0.000948 0.00250
1,1,2,2-Tetrachloroethane U 0.000695 0.00250
1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250
Tetrachloroethene U 0.000896 0.00250
Toluene U 0.00130 0.00500
1,2,3-Trichlorobenzene U 0.00733 0.0125
1,2,4-Trichlorobenzene U 0.00440 0.0125
1,1,1-Trichloroethane U 0.000923 0.00250
1,1,2-Trichloroethane U 0.000597 0.00250
Trichloroethene U 0.000584 0.00100
Trichlorofluoromethane U 0.000827 0.00250
1,2,3-Trichloropropane U 0.00162 0.0125
1,2,4-Trimethylbenzene U 0.00158 0.00500
1,2,3-Trimethylbenzene U 0.00158 0.00500
1,3,5-Trimethylbenzene U 0.00200 0.00500
Vinyl chloride U 0.00116 0.00250
Xylenes, Total U 0.000880 0.00650
(S) Toluene-d8 103 75.0-131
(S) 4-Bromofluorobenzene 86.7 67.0-138
(S) 1,2-Dichloroethane-d4 94.4 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3777182-1 04/01/22 20:42
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Acetone 0.625 0.695 111 10.0-160
Acrylonitrile 0.625 0.714 114 45.0-153
Benzene 0.125 0.122 97.6 70.0-123
Bromobenzene 0.125 0.115 92.0 73.0-121
Bromodichloromethane 0.125 0.121 96.8 73.0-121
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-01,02,03,04,05,06,07,08,09 Laboratory Control Sample (LCS)
(LCS) R3777182-1 04/01/22 20:42
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Bromoform 0.125 0.0864 69.1 64.0-132
Bromomethane 0.125 0.113 90.4 56.0-147
n-Butylbenzene 0.125 0.129 103 68.0-135
sec-Butylbenzene 0.125 0.124 99.2 74.0-130
tert-Butylbenzene 0.125 0.123 98.4 75.0-127
Carbon tetrachloride 0.125 0.131 105 66.0-128
Chlorobenzene 0.125 0.121 96.8 76.0-128
Chlorodibromomethane 0.125 0.103 82.4 74.0-127
Chloroethane 0.125 0.149 119 61.0-134
Chloroform 0.125 0.117 93.6 72.0-123
Chloromethane 0.125 0.173 138 51.0-138
2-Chlorotoluene 0.125 0.118 94.4 75.0-124
4-Chlorotoluene 0.125 0.120 96.0 75.0-124
1,2-Dibromo-3-Chloropropane 0.125 0.103 82.4 59.0-130
1,2-Dibromoethane 0.125 0.122 97.6 74.0-128
Dibromomethane 0.125 0.116 92.8 75.0-122
1,2-Dichlorobenzene 0.125 0.111 88.8 76.0-124
1,3-Dichlorobenzene 0.125 0.110 88.0 76.0-125
1,4-Dichlorobenzene 0.125 0.116 92.8 77.0-121
Dichlorodifluoromethane 0.125 0.137 110 43.0-156
1,1-Dichloroethane 0.125 0.124 99.2 70.0-127
1,2-Dichloroethane 0.125 0.139 111 65.0-131
1,1-Dichloroethene 0.125 0.142 114 65.0-131
cis-1,2-Dichloroethene 0.125 0.121 96.8 73.0-125
trans-1,2-Dichloroethene 0.125 0.125 100 71.0-125
1,2-Dichloropropane 0.125 0.133 106 74.0-125
1,1-Dichloropropene 0.125 0.125 100 73.0-125
1,3-Dichloropropane 0.125 0.127 102 80.0-125
cis-1,3-Dichloropropene 0.125 0.119 95.2 76.0-127
trans-1,3-Dichloropropene 0.125 0.120 96.0 73.0-127
2,2-Dichloropropane 0.125 0.116 92.8 59.0-135
Di-isopropyl ether 0.125 0.139 111 60.0-136
Ethylbenzene 0.125 0.114 91.2 74.0-126
Hexachloro-1,3-butadiene 0.125 0.163 130 57.0-150
Isopropylbenzene 0.125 0.117 93.6 72.0-127
p-Isopropyltoluene 0.125 0.122 97.6 72.0-133
2-Butanone (MEK) 0.625 0.694 111 30.0-160
Methylene Chloride 0.125 0.121 96.8 68.0-123
4-Methyl-2-pentanone (MIBK) 0.625 0.736 118 56.0-143
Methyl tert-butyl ether 0.125 0.115 92.0 66.0-132
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-01,02,03,04,05,06,07,08,09 Laboratory Control Sample (LCS)
(LCS) R3777182-1 04/01/22 20:42
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Naphthalene 0.125 0.155 124 59.0-130
n-Propylbenzene 0.125 0.124 99.2 74.0-126
Styrene 0.125 0.103 82.4 72.0-127
1,1,1,2-Tetrachloroethane 0.125 0.107 85.6 74.0-129
1,1,2,2-Tetrachloroethane 0.125 0.113 90.4 68.0-128
1,1,2-Trichlorotrifluoroethane 0.125 0.123 98.4 61.0-139 Tetrachloroethene 0.125 0.131 105 70.0-136
Toluene 0.125 0.124 99.2 75.0-121
1,2,3-Trichlorobenzene 0.125 0.167 134 59.0-139
1,2,4-Trichlorobenzene 0.125 0.146 117 62.0-137
1,1,1-Trichloroethane 0.125 0.122 97.6 69.0-126
1,1,2-Trichloroethane 0.125 0.125 100 78.0-123
Trichloroethene 0.125 0.124 99.2 76.0-126
Trichlorofluoromethane 0.125 0.126 101 61.0-142
1,2,3-Trichloropropane 0.125 0.119 95.2 67.0-129
1,2,4-Trimethylbenzene 0.125 0.118 94.4 70.0-126
1,2,3-Trimethylbenzene 0.125 0.124 99.2 74.0-124
1,3,5-Trimethylbenzene 0.125 0.123 98.4 73.0-127
Vinyl chloride 0.125 0.151 121 63.0-134
Xylenes, Total 0.375 0.354 94.4 72.0-127
(S) Toluene-d8 103 75.0-131
(S) 4-Bromofluorobenzene 90.4 67.0-138
(S) 1,2-Dichloroethane-d4 101 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-10 Method Blank (MB)
(MB) R3777220-3 04/03/22 00:14
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acetone U 0.0365 0.0500
Acrylonitrile U 0.00361 0.0125
Benzene U 0.000467 0.00100
Bromobenzene U 0.000900 0.0125
Bromodichloromethane U 0.000725 0.00250
Bromoform U 0.00117 0.0250
Bromomethane U 0.00197 0.0125
n-Butylbenzene U 0.00525 0.0125
sec-Butylbenzene U 0.00288 0.0125
tert-Butylbenzene U 0.00195 0.00500
Carbon tetrachloride U 0.000898 0.00500
Chlorobenzene U 0.000210 0.00250
Chlorodibromomethane U 0.000612 0.00250
Chloroethane U 0.00170 0.00500
Chloroform U 0.00103 0.00250
Chloromethane U 0.00435 0.0125
2-Chlorotoluene U 0.000865 0.00250
4-Chlorotoluene U 0.000450 0.00500
1,2-Dibromo-3-Chloropropane U 0.00390 0.0250
1,2-Dibromoethane U 0.000648 0.00250
Dibromomethane U 0.000750 0.00500
1,2-Dichlorobenzene U 0.000425 0.00500
1,3-Dichlorobenzene U 0.000600 0.00500
1,4-Dichlorobenzene U 0.000700 0.00500
Dichlorodifluoromethane U 0.00161 0.00250
1,1-Dichloroethane U 0.000491 0.00250
1,2-Dichloroethane U 0.000649 0.00250
1,1-Dichloroethene U 0.000606 0.00250
cis-1,2-Dichloroethene U 0.000734 0.00250
trans-1,2-Dichloroethene U 0.00104 0.00500
1,2-Dichloropropane U 0.00142 0.00500
1,1-Dichloropropene U 0.000809 0.00250
1,3-Dichloropropane U 0.000501 0.00500
cis-1,3-Dichloropropene U 0.000757 0.00250
trans-1,3-Dichloropropene U 0.00114 0.00500
2,2-Dichloropropane U 0.00138 0.00250
Di-isopropyl ether U 0.000410 0.00100
Ethylbenzene U 0.000737 0.00250
Hexachloro-1,3-butadiene U 0.00600 0.0250
Isopropylbenzene U 0.000425 0.00250
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-10 Method Blank (MB)
(MB) R3777220-3 04/03/22 00:14
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
p-Isopropyltoluene U 0.00255 0.00500
2-Butanone (MEK) U 0.0635 0.100
Methylene Chloride 0.00843 J 0.00664 0.0250
4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250
Methyl tert-butyl ether U 0.000350 0.00100
Naphthalene U 0.00488 0.0125
n-Propylbenzene U 0.000950 0.00500
Styrene U 0.000229 0.0125
1,1,1,2-Tetrachloroethane U 0.000948 0.00250
1,1,2,2-Tetrachloroethane U 0.000695 0.00250
1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250
Tetrachloroethene U 0.000896 0.00250
Toluene U 0.00130 0.00500
1,2,3-Trichlorobenzene U 0.00733 0.0125
1,2,4-Trichlorobenzene U 0.00440 0.0125
1,1,1-Trichloroethane U 0.000923 0.00250
1,1,2-Trichloroethane U 0.000597 0.00250
Trichloroethene U 0.000584 0.00100
Trichlorofluoromethane U 0.000827 0.00250
1,2,3-Trichloropropane U 0.00162 0.0125
1,2,4-Trimethylbenzene U 0.00158 0.00500
1,2,3-Trimethylbenzene U 0.00158 0.00500
1,3,5-Trimethylbenzene U 0.00200 0.00500
Vinyl chloride U 0.00116 0.00250
Xylenes, Total U 0.000880 0.00650
(S) Toluene-d8 104 75.0-131
(S) 4-Bromofluorobenzene 86.4 67.0-138
(S) 1,2-Dichloroethane-d4 98.5 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777220-1 04/02/22 23:15 • (LCSD) R3777220-2 04/02/22 23:34 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Acetone 0.625 0.661 0.673 106 108 10.0-160 1.80 31
Acrylonitrile 0.625 0.660 0.665 106 106 45.0-153 0.755 22 Benzene 0.125 0.112 0.114 89.6 91.2 70.0-123 1.77 20
Bromobenzene 0.125 0.114 0.112 91.2 89.6 73.0-121 1.77 20 Bromodichloromethane 0.125 0.113 0.115 90.4 92.0 73.0-121 1.75 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-10 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777220-1 04/02/22 23:15 • (LCSD) R3777220-2 04/02/22 23:34 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Bromoform 0.125 0.0805 0.0797 64.4 63.8 64.0-132 J4 0.999 20 Bromomethane 0.125 0.0963 0.0938 77.0 75.0 56.0-147 2.63 20 n-Butylbenzene 0.125 0.106 0.112 84.8 89.6 68.0-135 5.50 20 sec-Butylbenzene 0.125 0.108 0.113 86.4 90.4 74.0-130 4.52 20 tert-Butylbenzene 0.125 0.109 0.116 87.2 92.8 75.0-127 6.22 20 Carbon tetrachloride 0.125 0.115 0.118 92.0 94.4 66.0-128 2.58 20 Chlorobenzene 0.125 0.112 0.112 89.6 89.6 76.0-128 0.000 20 Chlorodibromomethane 0.125 0.0969 0.0971 77.5 77.7 74.0-127 0.206 20 Chloroethane 0.125 0.125 0.127 100 102 61.0-134 1.59 20 Chloroform 0.125 0.107 0.109 85.6 87.2 72.0-123 1.85 20 Chloromethane 0.125 0.148 0.149 118 119 51.0-138 0.673 20 2-Chlorotoluene 0.125 0.107 0.101 85.6 80.8 75.0-124 5.77 20 4-Chlorotoluene 0.125 0.108 0.112 86.4 89.6 75.0-124 3.64 20 1,2-Dibromo-3-Chloropropane 0.125 0.0938 0.0914 75.0 73.1 59.0-130 2.59 20 1,2-Dibromoethane 0.125 0.112 0.115 89.6 92.0 74.0-128 2.64 20 Dibromomethane 0.125 0.109 0.114 87.2 91.2 75.0-122 4.48 20 1,2-Dichlorobenzene 0.125 0.106 0.102 84.8 81.6 76.0-124 3.85 20 1,3-Dichlorobenzene 0.125 0.101 0.104 80.8 83.2 76.0-125 2.93 20 1,4-Dichlorobenzene 0.125 0.105 0.110 84.0 88.0 77.0-121 4.65 20 Dichlorodifluoromethane 0.125 0.115 0.119 92.0 95.2 43.0-156 3.42 20 1,1-Dichloroethane 0.125 0.112 0.115 89.6 92.0 70.0-127 2.64 20 1,2-Dichloroethane 0.125 0.133 0.134 106 107 65.0-131 0.749 20 1,1-Dichloroethene 0.125 0.122 0.126 97.6 101 65.0-131 3.23 20 cis-1,2-Dichloroethene 0.125 0.109 0.114 87.2 91.2 73.0-125 4.48 20 trans-1,2-Dichloroethene 0.125 0.112 0.114 89.6 91.2 71.0-125 1.77 20 1,2-Dichloropropane 0.125 0.122 0.131 97.6 105 74.0-125 7.11 20 1,1-Dichloropropene 0.125 0.110 0.114 88.0 91.2 73.0-125 3.57 20 1,3-Dichloropropane 0.125 0.121 0.120 96.8 96.0 80.0-125 0.830 20 cis-1,3-Dichloropropene 0.125 0.112 0.117 89.6 93.6 76.0-127 4.37 20 trans-1,3-Dichloropropene 0.125 0.110 0.113 88.0 90.4 73.0-127 2.69 20 2,2-Dichloropropane 0.125 0.0957 0.0975 76.6 78.0 59.0-135 1.86 20 Di-isopropyl ether 0.125 0.128 0.130 102 104 60.0-136 1.55 20 Ethylbenzene 0.125 0.102 0.0978 81.6 78.2 74.0-126 4.20 20 Hexachloro-1,3-butadiene 0.125 0.121 0.127 96.8 102 57.0-150 4.84 20 Isopropylbenzene 0.125 0.103 0.101 82.4 80.8 72.0-127 1.96 20 p-Isopropyltoluene 0.125 0.103 0.108 82.4 86.4 72.0-133 4.74 20 2-Butanone (MEK) 0.625 0.658 0.677 105 108 30.0-160 2.85 24 Methylene Chloride 0.125 0.110 0.110 88.0 88.0 68.0-123 0.000 20 4-Methyl-2-pentanone (MIBK) 0.625 0.688 0.673 110 108 56.0-143 2.20 20 Methyl tert-butyl ether 0.125 0.107 0.105 85.6 84.0 66.0-132 1.89 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7848 of 11211 47 of 54 WG1842238 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-10 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777220-1 04/02/22 23:15 • (LCSD) R3777220-2 04/02/22 23:34 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Naphthalene 0.125 0.118 0.125 94.4 100 59.0-130 5.76 20 n-Propylbenzene 0.125 0.111 0.116 88.8 92.8 74.0-126 4.41 20 Styrene 0.125 0.0918 0.0928 73.4 74.2 72.0-127 1.08 20
1,1,1,2-Tetrachloroethane 0.125 0.0968 0.0953 77.4 76.2 74.0-129 1.56 20 1,1,2,2-Tetrachloroethane 0.125 0.104 0.107 83.2 85.6 68.0-128 2.84 20 1,1,2-Trichlorotrifluoroethane 0.125 0.102 0.105 81.6 84.0 61.0-139 2.90 20 Tetrachloroethene 0.125 0.117 0.116 93.6 92.8 70.0-136 0.858 20 Toluene 0.125 0.115 0.115 92.0 92.0 75.0-121 0.000 20
1,2,3-Trichlorobenzene 0.125 0.125 0.130 100 104 59.0-139 3.92 20 1,2,4-Trichlorobenzene 0.125 0.111 0.115 88.8 92.0 62.0-137 3.54 20 1,1,1-Trichloroethane 0.125 0.110 0.113 88.0 90.4 69.0-126 2.69 20 1,1,2-Trichloroethane 0.125 0.117 0.119 93.6 95.2 78.0-123 1.69 20 Trichloroethene 0.125 0.112 0.118 89.6 94.4 76.0-126 5.22 20 Trichlorofluoromethane 0.125 0.109 0.112 87.2 89.6 61.0-142 2.71 20 1,2,3-Trichloropropane 0.125 0.114 0.112 91.2 89.6 67.0-129 1.77 20 1,2,4-Trimethylbenzene 0.125 0.105 0.107 84.0 85.6 70.0-126 1.89 20 1,2,3-Trimethylbenzene 0.125 0.111 0.113 88.8 90.4 74.0-124 1.79 20 1,3,5-Trimethylbenzene 0.125 0.109 0.113 87.2 90.4 73.0-127 3.60 20 Vinyl chloride 0.125 0.130 0.130 104 104 63.0-134 0.000 20 Xylenes, Total 0.375 0.319 0.314 85.1 83.7 72.0-127 1.58 20 (S) Toluene-d8 102 100 75.0-131
(S) 4-Bromofluorobenzene 89.8 85.8 67.0-138
(S) 1,2-Dichloroethane-d4 102 102 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476737-01,02,03 Method Blank (MB)
(MB) R3777443-3 04/04/22 14:19
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Naphthalene U 0.00488 0.0125
1,2,4-Trimethylbenzene 0.00420 J 0.00158 0.00500
1,2,3-Trimethylbenzene U 0.00158 0.00500
1,3,5-Trimethylbenzene U 0.00200 0.00500
Xylenes, Total U 0.000880 0.00650
(S) Toluene-d8 105 75.0-131
(S) 4-Bromofluorobenzene 85.6 67.0-138
(S) 1,2-Dichloroethane-d4 95.2 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777443-1 04/04/22 13:01 • (LCSD) R3777443-2 04/04/22 13:21 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Naphthalene 0.125 0.0984 0.102 78.7 81.6 59.0-130 3.59 20 1,2,4-Trimethylbenzene 0.125 0.122 0.111 97.6 88.8 70.0-126 9.44 20 1,2,3-Trimethylbenzene 0.125 0.112 0.113 89.6 90.4 74.0-124 0.889 20 1,3,5-Trimethylbenzene 0.125 0.114 0.111 91.2 88.8 73.0-127 2.67 20 Xylenes, Total 0.375 0.330 0.309 88.0 82.4 72.0-127 6.57 20 (S) Toluene-d8 102 102 75.0-131
(S) 4-Bromofluorobenzene 88.9 88.6 67.0-138
(S) 1,2-Dichloroethane-d4 104 102 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 8015 L1476737-01,02 Method Blank (MB)
(MB) R3777172-1 04/03/22 15:14
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
C12-C22 Hydrocarbons U 0.733 4.00
C22-C32 Hydrocarbons U 1.33 4.00
C32-C40 Hydrocarbons U 1.33 4.00
(S) o-Terphenyl 91.6 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3777172-2 04/03/22 15:31
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 25.0 20.1 80.4 50.0-150
C22-C32 Hydrocarbons 25.0 20.5 82.0 50.0-150
(S) o-Terphenyl 80.5 18.0-148
L1476312-06 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476312-06 04/03/22 16:38 • (MS) R3777172-3 04/04/22 09:19 • (MSD) R3777172-4 04/04/22 09:35 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
C12-C22 Hydrocarbons 32.0 ND 22.2 22.4 66.5 67.2 1 50.0-150 0.590 20 C22-C32 Hydrocarbons 32.0 ND 22.4 24.1 59.4 65.0 1 50.0-150 7.37 20 (S) o-Terphenyl 67.0 73.8 18.0-148
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 8015 L1476737-03,04,05,06,07,08,09,10 Method Blank (MB)
(MB) R3777960-1 04/05/22 21:03
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
C12-C22 Hydrocarbons U 0.733 4.00
C22-C32 Hydrocarbons U 1.33 4.00
C32-C40 Hydrocarbons U 1.33 4.00
(S) o-Terphenyl 90.7 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3777960-2 04/05/22 21:45
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 25.0 21.8 87.2 50.0-150
C22-C32 Hydrocarbons 25.0 20.1 80.4 50.0-150
(S) o-Terphenyl 73.4 18.0-148
L1476737-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476737-03 04/05/22 22:02 • (MS) R3777960-3 04/05/22 22:19 • (MSD) R3777960-4 04/05/22 22:36 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
C12-C22 Hydrocarbons 26.8 ND 24.4 24.9 90.9 95.4 1 50.0-150 2.24 20 C22-C32 Hydrocarbons 26.8 ND 23.4 23.2 87.2 88.6 1 50.0-150 0.948 20 (S) o-Terphenyl 68.8 72.8 18.0-148
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
(dry) Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils].

MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

RDL (dry) Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
B The same analyte is found in the associated blank.

J The identification of the analyte is acceptable; the reported value is an estimate.

J4 The associated batch QC was outside the established quality control range for accuracy.

J6 The sample matrix interfered with the ability to make any accurate determination; spike value is low.

V The sample concentration is too high to evaluate accurate spike recoveries. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476737 04/06/22 16:41 7853 of 11211 52 of 54 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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ANALYTICAL REPORT
April 07, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1477365
Samples Received: 03/31/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 07, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 5
Ds: Detection Summary 6
Sr: Sample Results 8
B-2-10' L1477365-01 8
B-2-15' L1477365-02 10
B-1-1' L1477365-03 12
B-1-5' L1477365-04 15
B-1-10' L1477365-05 18
B-1-15' L1477365-06 20
Qc: Quality Control Summary 22
Total Solids by Method 2540 G-2011 22
Mercury by Method 7471A 23
Metals (ICP) by Method 6010B 24
Volatile Organic Compounds (GC) by Method 8015 26
Volatile Organic Compounds (GC/MS) by Method 8260B 27
Semi-Volatile Organic Compounds (GC) by Method 8015 31
Gl: Glossary of Terms 32
Al: Accreditations & Locations 33
Sc: Sample Chain of Custody 34
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-2-10' L1477365-01 Solid G. Carr 03/29/22 13:25 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 31 03/29/22 13:25 04/02/22 14:20 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1.24 03/29/22 13:25 04/04/22 09:31 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 1 04/06/22 23:01 04/07/22 04:51 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-2-15' L1477365-02 Solid G. Carr 03/29/22 13:25 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 25 03/29/22 13:25 04/02/22 14:43 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1 03/29/22 13:25 04/04/22 09:50 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 1 04/06/22 23:01 04/07/22 02:56 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-1-1' L1477365-03 Solid G. Carr 03/30/22 08:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Mercury by Method 7471A WG1842716 1 04/05/22 08:11 04/06/22 10:47 MRW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1842556 1 04/03/22 18:13 04/04/22 17:18 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 25 03/30/22 08:00 04/02/22 15:06 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1 03/30/22 08:00 04/04/22 10:09 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 5 04/06/22 23:01 04/07/22 05:08 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-1-5' L1477365-04 Solid G. Carr 03/30/22 08:05 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Mercury by Method 7471A WG1842716 1 04/05/22 08:11 04/06/22 10:49 MRW Mt. Juliet, TN Metals (ICP) by Method 6010B WG1842556 1 04/03/22 18:13 04/04/22 17:21 CCE Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 25 03/30/22 08:05 04/02/22 15:29 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1 03/30/22 08:05 04/04/22 10:28 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 1 04/06/22 23:01 04/07/22 04:00 JN Mt. Juliet, TN Collected by Collected date/time Received date/time
B-1-10' L1477365-05 Solid G. Carr 03/30/22 08:10 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 25.5 03/30/22 08:10 04/02/22 15:52 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1.02 03/30/22 08:10 04/04/22 10:47 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 1 04/06/22 23:01 04/07/22 03:44 JN Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-1-15' L1477365-06 Solid G. Carr 03/30/22 08:15 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841822 1 04/04/22 13:33 04/04/22 13:38 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1842183 25 03/30/22 08:15 04/02/22 16:15 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842408 1 03/30/22 08:15 04/04/22 11:06 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1844101 1 04/06/22 23:01 04/07/22 03:12 JN Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Metals (ICP) by Method 6010B
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1842556 (MS) R3777506-5, (MSD) R3777506-6 Antimony and Barium 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 5 of 34 Jordan N Zito
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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DETECTION SUMMARY
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-1-1' L1477365-03 Mercury 0.923 0.0426 1 04/06/2022 10:47 WG1842716 B-1-5' L1477365-04 Mercury 0.0980 0.0441 1 04/06/2022 10:49 WG1842716 Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-1-1' L1477365-03 Antimony 2.61 2.13 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Arsenic 57.9 2.13 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Barium 489 0.533 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Beryllium 0.323 0.213 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Cadmium 1.05 0.533 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Chromium 65.1 1.07 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Cobalt 9.75 1.07 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Copper 105 2.13 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Lead 447 0.533 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Molybdenum 0.843 0.533 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Nickel 54.6 2.13 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Vanadium 61.9 2.13 1 04/04/2022 17:18 WG1842556 B-1-1' L1477365-03 Zinc 443 5.33 1 04/04/2022 17:18 WG1842556 B-1-5' L1477365-04 Arsenic 7.03 2.20 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Barium 179 0.551 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Beryllium 0.410 0.220 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Chromium 61.2 1.10 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Cobalt 14.9 1.10 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Copper 25.8 2.20 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Lead 33.2 0.551 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Nickel 58.0 2.20 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Vanadium 66.8 2.20 1 04/04/2022 17:21 WG1842556 B-1-5' L1477365-04 Zinc 82.8 5.51 1 04/04/2022 17:21 WG1842556 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-2-10' L1477365-01 2-Butanone (MEK) 0.183 0.140 1.24 04/04/2022 09:31 WG1842408 B-2-10' L1477365-01 Tetrachloroethene 0.114 0.00350 1.24 04/04/2022 09:31 WG1842408 B-2-10' L1477365-01 Trichloroethene 0.0157 0.00140 1.24 04/04/2022 09:31 WG1842408 B-2-15' L1477365-02 2-Butanone (MEK) 0.132 0.128 1 04/04/2022 09:50 WG1842408 B-2-15' L1477365-02 Tetrachloroethene 0.0223 0.00321 1 04/04/2022 09:50 WG1842408 B-1-1' L1477365-03 Benzene 0.0129 0.00113 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 p-Isopropyltoluene 0.00791 0.00566 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 Naphthalene 0.0352 0.0142 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 Tetrachloroethene 0.00348 0.00283 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 Toluene 0.0400 0.00566 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 1,2,4-Trimethylbenzene 0.0205 0.00566 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 1,2,3-Trimethylbenzene 0.0171 0.00566 1 04/04/2022 10:09 WG1842408 B-1-1' L1477365-03 Xylenes, Total 0.0543 0.00736 1 04/04/2022 10:09 WG1842408 B-1-5' L1477365-04 2-Butanone (MEK) 0.123 0.120 1 04/04/2022 10:28 WG1842408 B-1-5' L1477365-04 Xylenes, Total 0.00825 0.00783 1 04/04/2022 10:28 WG1842408 B-1-10' L1477365-05 2-Butanone (MEK) 0.123 0.116 1.02 04/04/2022 10:47 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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DETECTION SUMMARY
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time B-2-10' L1477365-01 C22-C32 Hydrocarbons 19.6 4.29 1 04/07/2022 04:51 WG1844101 B-2-10' L1477365-01 C32-C40 Hydrocarbons 19.1 4.29 1 04/07/2022 04:51 WG1844101 B-1-1' L1477365-03 C12-C22 Hydrocarbons 50.8 21.3 5 04/07/2022 05:08 WG1844101 B-1-1' L1477365-03 C22-C32 Hydrocarbons 223 21.3 5 04/07/2022 05:08 WG1844101 B-1-1' L1477365-03 C32-C40 Hydrocarbons 124 21.3 5 04/07/2022 05:08 WG1844101 B-1-5' L1477365-04 C22-C32 Hydrocarbons 14.1 4.41 1 04/07/2022 04:00 WG1844101 B-1-5' L1477365-04 C32-C40 Hydrocarbons 6.90 4.41 1 04/07/2022 04:00 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-2-10'
Collected date/time: 03/29/22 13:25
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 93.3 1 04/04/2022 13:38 WG1841822
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.50 31 04/02/2022 14:20 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 97.1 77.0-120 04/02/2022 14:20 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0700 1.24 04/04/2022 09:31 WG1842408
Acrylonitrile ND 0.0175 1.24 04/04/2022 09:31 WG1842408 Benzene ND 0.00140 1.24 04/04/2022 09:31 WG1842408
Bromobenzene ND 0.0175 1.24 04/04/2022 09:31 WG1842408
Bromodichloromethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Bromoform ND 0.0350 1.24 04/04/2022 09:31 WG1842408
Bromomethane ND 0.0175 1.24 04/04/2022 09:31 WG1842408
n-Butylbenzene ND 0.0175 1.24 04/04/2022 09:31 WG1842408 sec-Butylbenzene ND 0.0175 1.24 04/04/2022 09:31 WG1842408 tert-Butylbenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Carbon tetrachloride ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Chlorobenzene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Chlorodibromomethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Chloroethane ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Chloroform ND 0.00350 1.24 04/04/2022 09:31 WG1842408
Chloromethane ND 0.0175 1.24 04/04/2022 09:31 WG1842408 2-Chlorotoluene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 4-Chlorotoluene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,2-Dibromo-3-Chloropropane ND 0.0350 1.24 04/04/2022 09:31 WG1842408 1,2-Dibromoethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Dibromomethane ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,2-Dichlorobenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,3-Dichlorobenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,4-Dichlorobenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Dichlorodifluoromethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,1-Dichloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,2-Dichloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,1-Dichloroethene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 cis-1,2-Dichloroethene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 trans-1,2-Dichloroethene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,2-Dichloropropane ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,1-Dichloropropene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,3-Dichloropropane ND 0.00700 1.24 04/04/2022 09:31 WG1842408 cis-1,3-Dichloropropene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 trans-1,3-Dichloropropene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 2,2-Dichloropropane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Di-isopropyl ether ND 0.00140 1.24 04/04/2022 09:31 WG1842408 Ethylbenzene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Hexachloro-1,3-butadiene ND 0.0350 1.24 04/04/2022 09:31 WG1842408 Isopropylbenzene ND 0.00350 1.24 04/04/2022 09:31 WG1842408 p-Isopropyltoluene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 2-Butanone (MEK) 0.183 0.140 1.24 04/04/2022 09:31 WG1842408 Methylene Chloride ND 0.0350 1.24 04/04/2022 09:31 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0350 1.24 04/04/2022 09:31 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477365
B-2-10'
Collected date/time: 03/29/22 13:25
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00140 1.24 04/04/2022 09:31 WG1842408 Naphthalene ND 0.0175 1.24 04/04/2022 09:31 WG1842408
n-Propylbenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Styrene ND 0.0175 1.24 04/04/2022 09:31 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Tetrachloroethene 0.114 0.00350 1.24 04/04/2022 09:31 WG1842408 Toluene ND 0.00700 1.24 04/04/2022 09:31 WG1842408
1,2,3-Trichlorobenzene ND 0.0175 1.24 04/04/2022 09:31 WG1842408 1,2,4-Trichlorobenzene ND 0.0175 1.24 04/04/2022 09:31 WG1842408 1,1,1-Trichloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,1,2-Trichloroethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Trichloroethene 0.0157 0.00140 1.24 04/04/2022 09:31 WG1842408 Trichlorofluoromethane ND 0.00350 1.24 04/04/2022 09:31 WG1842408 1,2,3-Trichloropropane ND 0.0175 1.24 04/04/2022 09:31 WG1842408 1,2,4-Trimethylbenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,2,3-Trimethylbenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 1,3,5-Trimethylbenzene ND 0.00700 1.24 04/04/2022 09:31 WG1842408 Vinyl chloride ND 0.00350 1.24 04/04/2022 09:31 WG1842408 Xylenes, Total ND 0.00910 1.24 04/04/2022 09:31 WG1842408 (S) Toluene-d8 96.2 75.0-131 04/04/2022 09:31 WG1842408 (S) 4-Bromofluorobenzene 102 67.0-138 04/04/2022 09:31 WG1842408 (S) 1,2-Dichloroethane-d4 103 70.0-130 04/04/2022 09:31 WG1842408 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.29 1 04/07/2022 04:51 WG1844101 C22-C32 Hydrocarbons 19.6 4.29 1 04/07/2022 04:51 WG1844101 C32-C40 Hydrocarbons 19.1 4.29 1 04/07/2022 04:51 WG1844101 (S) o-Terphenyl 65.0 18.0-148 04/07/2022 04:51 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477365
B-2-15'
Collected date/time: 03/29/22 13:25
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 88.3 1 04/04/2022 13:38 WG1841822
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.21 25 04/02/2022 14:43 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 98.1 77.0-120 04/02/2022 14:43 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0642 1 04/04/2022 09:50 WG1842408
Acrylonitrile ND 0.0160 1 04/04/2022 09:50 WG1842408
Benzene ND 0.00128 1 04/04/2022 09:50 WG1842408
Bromobenzene ND 0.0160 1 04/04/2022 09:50 WG1842408
Bromodichloromethane ND 0.00321 1 04/04/2022 09:50 WG1842408 Bromoform ND 0.0321 1 04/04/2022 09:50 WG1842408
Bromomethane ND 0.0160 1 04/04/2022 09:50 WG1842408
n-Butylbenzene ND 0.0160 1 04/04/2022 09:50 WG1842408
sec-Butylbenzene ND 0.0160 1 04/04/2022 09:50 WG1842408 tert-Butylbenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 Carbon tetrachloride ND 0.00642 1 04/04/2022 09:50 WG1842408 Chlorobenzene ND 0.00321 1 04/04/2022 09:50 WG1842408
Chlorodibromomethane ND 0.00321 1 04/04/2022 09:50 WG1842408 Chloroethane ND 0.00642 1 04/04/2022 09:50 WG1842408
Chloroform ND 0.00321 1 04/04/2022 09:50 WG1842408
Chloromethane ND 0.0160 1 04/04/2022 09:50 WG1842408
2-Chlorotoluene ND 0.00321 1 04/04/2022 09:50 WG1842408 4-Chlorotoluene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,2-Dibromo-3-Chloropropane ND 0.0321 1 04/04/2022 09:50 WG1842408 1,2-Dibromoethane ND 0.00321 1 04/04/2022 09:50 WG1842408 Dibromomethane ND 0.00642 1 04/04/2022 09:50 WG1842408
1,2-Dichlorobenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,3-Dichlorobenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,4-Dichlorobenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 Dichlorodifluoromethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,1-Dichloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,2-Dichloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,1-Dichloroethene ND 0.00321 1 04/04/2022 09:50 WG1842408 cis-1,2-Dichloroethene ND 0.00321 1 04/04/2022 09:50 WG1842408 trans-1,2-Dichloroethene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,2-Dichloropropane ND 0.00642 1 04/04/2022 09:50 WG1842408 1,1-Dichloropropene ND 0.00321 1 04/04/2022 09:50 WG1842408 1,3-Dichloropropane ND 0.00642 1 04/04/2022 09:50 WG1842408 cis-1,3-Dichloropropene ND 0.00321 1 04/04/2022 09:50 WG1842408 trans-1,3-Dichloropropene ND 0.00642 1 04/04/2022 09:50 WG1842408 2,2-Dichloropropane ND 0.00321 1 04/04/2022 09:50 WG1842408 Di-isopropyl ether ND 0.00128 1 04/04/2022 09:50 WG1842408 Ethylbenzene ND 0.00321 1 04/04/2022 09:50 WG1842408
Hexachloro-1,3-butadiene ND 0.0321 1 04/04/2022 09:50 WG1842408 Isopropylbenzene ND 0.00321 1 04/04/2022 09:50 WG1842408 p-Isopropyltoluene ND 0.00642 1 04/04/2022 09:50 WG1842408 2-Butanone (MEK) 0.132 0.128 1 04/04/2022 09:50 WG1842408 Methylene Chloride ND 0.0321 1 04/04/2022 09:50 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0321 1 04/04/2022 09:50 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-2-15'
Collected date/time: 03/29/22 13:25
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00128 1 04/04/2022 09:50 WG1842408 Naphthalene ND 0.0160 1 04/04/2022 09:50 WG1842408
n-Propylbenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 Styrene ND 0.0160 1 04/04/2022 09:50 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 Tetrachloroethene 0.0223 0.00321 1 04/04/2022 09:50 WG1842408 Toluene ND 0.00642 1 04/04/2022 09:50 WG1842408
1,2,3-Trichlorobenzene ND 0.0160 1 04/04/2022 09:50 WG1842408 1,2,4-Trichlorobenzene ND 0.0160 1 04/04/2022 09:50 WG1842408 1,1,1-Trichloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,1,2-Trichloroethane ND 0.00321 1 04/04/2022 09:50 WG1842408 Trichloroethene ND 0.00128 1 04/04/2022 09:50 WG1842408 Trichlorofluoromethane ND 0.00321 1 04/04/2022 09:50 WG1842408 1,2,3-Trichloropropane ND 0.0160 1 04/04/2022 09:50 WG1842408 1,2,4-Trimethylbenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,2,3-Trimethylbenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 1,3,5-Trimethylbenzene ND 0.00642 1 04/04/2022 09:50 WG1842408 Vinyl chloride ND 0.00321 1 04/04/2022 09:50 WG1842408
Xylenes, Total ND 0.00834 1 04/04/2022 09:50 WG1842408
(S) Toluene-d8 104 75.0-131 04/04/2022 09:50 WG1842408
(S) 4-Bromofluorobenzene 88.6 67.0-138 04/04/2022 09:50 WG1842408 (S) 1,2-Dichloroethane-d4 97.1 70.0-130 04/04/2022 09:50 WG1842408 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.53 1 04/07/2022 02:56 WG1844101 C22-C32 Hydrocarbons ND 4.53 1 04/07/2022 02:56 WG1844101 C32-C40 Hydrocarbons ND 4.53 1 04/07/2022 02:56 WG1844101 (S) o-Terphenyl 43.7 18.0-148 04/07/2022 02:56 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-1-1'
Collected date/time: 03/30/22 08:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 93.9 1 04/04/2022 13:38 WG1841822
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.923 0.0426 1 04/06/2022 10:47 WG1842716
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony 2.61 2.13 1 04/04/2022 17:18 WG1842556
Arsenic 57.9 2.13 1 04/04/2022 17:18 WG1842556
Barium 489 0.533 1 04/04/2022 17:18 WG1842556
Beryllium 0.323 0.213 1 04/04/2022 17:18 WG1842556
Cadmium 1.05 0.533 1 04/04/2022 17:18 WG1842556
Chromium 65.1 1.07 1 04/04/2022 17:18 WG1842556
Cobalt 9.75 1.07 1 04/04/2022 17:18 WG1842556
Copper 105 2.13 1 04/04/2022 17:18 WG1842556
Lead 447 0.533 1 04/04/2022 17:18 WG1842556
Molybdenum 0.843 0.533 1 04/04/2022 17:18 WG1842556
Nickel 54.6 2.13 1 04/04/2022 17:18 WG1842556
Selenium ND 2.13 1 04/04/2022 17:18 WG1842556
Silver ND 1.07 1 04/04/2022 17:18 WG1842556
Thallium ND 2.13 1 04/04/2022 17:18 WG1842556
Vanadium 61.9 2.13 1 04/04/2022 17:18 WG1842556
Zinc 443 5.33 1 04/04/2022 17:18 WG1842556
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 2.83 25 04/02/2022 15:06 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 97.3 77.0-120 04/02/2022 15:06 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0566 1 04/04/2022 10:09 WG1842408
Acrylonitrile ND 0.0142 1 04/04/2022 10:09 WG1842408
Benzene 0.0129 0.00113 1 04/04/2022 10:09 WG1842408
Bromobenzene ND 0.0142 1 04/04/2022 10:09 WG1842408
Bromodichloromethane ND 0.00283 1 04/04/2022 10:09 WG1842408 Bromoform ND 0.0283 1 04/04/2022 10:09 WG1842408
Bromomethane ND 0.0142 1 04/04/2022 10:09 WG1842408
n-Butylbenzene ND 0.0142 1 04/04/2022 10:09 WG1842408
sec-Butylbenzene ND 0.0142 1 04/04/2022 10:09 WG1842408 tert-Butylbenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 Carbon tetrachloride ND 0.00566 1 04/04/2022 10:09 WG1842408 Chlorobenzene ND 0.00283 1 04/04/2022 10:09 WG1842408
Chlorodibromomethane ND 0.00283 1 04/04/2022 10:09 WG1842408 Chloroethane ND 0.00566 1 04/04/2022 10:09 WG1842408
Chloroform ND 0.00283 1 04/04/2022 10:09 WG1842408
Chloromethane ND 0.0142 1 04/04/2022 10:09 WG1842408
2-Chlorotoluene ND 0.00283 1 04/04/2022 10:09 WG1842408 4-Chlorotoluene ND 0.00566 1 04/04/2022 10:09 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-1-1'
Collected date/time: 03/30/22 08:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0283 1 04/04/2022 10:09 WG1842408 1,2-Dibromoethane ND 0.00283 1 04/04/2022 10:09 WG1842408 Dibromomethane ND 0.00566 1 04/04/2022 10:09 WG1842408
1,2-Dichlorobenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 1,3-Dichlorobenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 1,4-Dichlorobenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 Dichlorodifluoromethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,1-Dichloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,2-Dichloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,1-Dichloroethene ND 0.00283 1 04/04/2022 10:09 WG1842408 cis-1,2-Dichloroethene ND 0.00283 1 04/04/2022 10:09 WG1842408 trans-1,2-Dichloroethene ND 0.00566 1 04/04/2022 10:09 WG1842408 1,2-Dichloropropane ND 0.00566 1 04/04/2022 10:09 WG1842408 1,1-Dichloropropene ND 0.00283 1 04/04/2022 10:09 WG1842408 1,3-Dichloropropane ND 0.00566 1 04/04/2022 10:09 WG1842408 cis-1,3-Dichloropropene ND 0.00283 1 04/04/2022 10:09 WG1842408 trans-1,3-Dichloropropene ND 0.00566 1 04/04/2022 10:09 WG1842408 2,2-Dichloropropane ND 0.00283 1 04/04/2022 10:09 WG1842408 Di-isopropyl ether ND 0.00113 1 04/04/2022 10:09 WG1842408 Ethylbenzene ND 0.00283 1 04/04/2022 10:09 WG1842408
Hexachloro-1,3-butadiene ND 0.0283 1 04/04/2022 10:09 WG1842408 Isopropylbenzene ND 0.00283 1 04/04/2022 10:09 WG1842408 p-Isopropyltoluene 0.00791 0.00566 1 04/04/2022 10:09 WG1842408 2-Butanone (MEK) ND 0.113 1 04/04/2022 10:09 WG1842408
Methylene Chloride ND 0.0283 1 04/04/2022 10:09 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0283 1 04/04/2022 10:09 WG1842408 Methyl tert-butyl ether ND 0.00113 1 04/04/2022 10:09 WG1842408 Naphthalene 0.0352 0.0142 1 04/04/2022 10:09 WG1842408
n-Propylbenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 Styrene ND 0.0142 1 04/04/2022 10:09 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 Tetrachloroethene 0.00348 0.00283 1 04/04/2022 10:09 WG1842408 Toluene 0.0400 0.00566 1 04/04/2022 10:09 WG1842408
1,2,3-Trichlorobenzene ND 0.0142 1 04/04/2022 10:09 WG1842408 1,2,4-Trichlorobenzene ND 0.0142 1 04/04/2022 10:09 WG1842408 1,1,1-Trichloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,1,2-Trichloroethane ND 0.00283 1 04/04/2022 10:09 WG1842408 Trichloroethene ND 0.00113 1 04/04/2022 10:09 WG1842408 Trichlorofluoromethane ND 0.00283 1 04/04/2022 10:09 WG1842408 1,2,3-Trichloropropane ND 0.0142 1 04/04/2022 10:09 WG1842408 1,2,4-Trimethylbenzene 0.0205 0.00566 1 04/04/2022 10:09 WG1842408 1,2,3-Trimethylbenzene 0.0171 0.00566 1 04/04/2022 10:09 WG1842408 1,3,5-Trimethylbenzene ND 0.00566 1 04/04/2022 10:09 WG1842408 Vinyl chloride ND 0.00283 1 04/04/2022 10:09 WG1842408
Xylenes, Total 0.0543 0.00736 1 04/04/2022 10:09 WG1842408 (S) Toluene-d8 106 75.0-131 04/04/2022 10:09 WG1842408
(S) 4-Bromofluorobenzene 91.8 67.0-138 04/04/2022 10:09 WG1842408 (S) 1,2-Dichloroethane-d4 93.6 70.0-130 04/04/2022 10:09 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7868 of 11211 13 of 34 SAMPLE RESULTS - 03
L1477365
B-1-1'
Collected date/time: 03/30/22 08:00
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons 50.8 21.3 5 04/07/2022 05:08 WG1844101 C22-C32 Hydrocarbons 223 21.3 5 04/07/2022 05:08 WG1844101 C32-C40 Hydrocarbons 124 21.3 5 04/07/2022 05:08 WG1844101 (S) o-Terphenyl 61.1 18.0-148 04/07/2022 05:08 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-1-5'
Collected date/time: 03/30/22 08:05
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 90.7 1 04/04/2022 13:38 WG1841822
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0980 0.0441 1 04/06/2022 10:49 WG1842716
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.20 1 04/04/2022 17:21 WG1842556
Arsenic 7.03 2.20 1 04/04/2022 17:21 WG1842556
Barium 179 0.551 1 04/04/2022 17:21 WG1842556
Beryllium 0.410 0.220 1 04/04/2022 17:21 WG1842556
Cadmium ND 0.551 1 04/04/2022 17:21 WG1842556
Chromium 61.2 1.10 1 04/04/2022 17:21 WG1842556
Cobalt 14.9 1.10 1 04/04/2022 17:21 WG1842556
Copper 25.8 2.20 1 04/04/2022 17:21 WG1842556
Lead 33.2 0.551 1 04/04/2022 17:21 WG1842556
Molybdenum ND 0.551 1 04/04/2022 17:21 WG1842556
Nickel 58.0 2.20 1 04/04/2022 17:21 WG1842556
Selenium ND 2.20 1 04/04/2022 17:21 WG1842556
Silver ND 1.10 1 04/04/2022 17:21 WG1842556
Thallium ND 2.20 1 04/04/2022 17:21 WG1842556
Vanadium 66.8 2.20 1 04/04/2022 17:21 WG1842556
Zinc 82.8 5.51 1 04/04/2022 17:21 WG1842556
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.01 25 04/02/2022 15:29 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 98.1 77.0-120 04/02/2022 15:29 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0602 1 04/04/2022 10:28 WG1842408
Acrylonitrile ND 0.0151 1 04/04/2022 10:28 WG1842408
Benzene ND 0.00120 1 04/04/2022 10:28 WG1842408
Bromobenzene ND 0.0151 1 04/04/2022 10:28 WG1842408
Bromodichloromethane ND 0.00301 1 04/04/2022 10:28 WG1842408 Bromoform ND 0.0301 1 04/04/2022 10:28 WG1842408
Bromomethane ND 0.0151 1 04/04/2022 10:28 WG1842408
n-Butylbenzene ND 0.0151 1 04/04/2022 10:28 WG1842408
sec-Butylbenzene ND 0.0151 1 04/04/2022 10:28 WG1842408 tert-Butylbenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 Carbon tetrachloride ND 0.00602 1 04/04/2022 10:28 WG1842408 Chlorobenzene ND 0.00301 1 04/04/2022 10:28 WG1842408
Chlorodibromomethane ND 0.00301 1 04/04/2022 10:28 WG1842408 Chloroethane ND 0.00602 1 04/04/2022 10:28 WG1842408
Chloroform ND 0.00301 1 04/04/2022 10:28 WG1842408
Chloromethane ND 0.0151 1 04/04/2022 10:28 WG1842408
2-Chlorotoluene ND 0.00301 1 04/04/2022 10:28 WG1842408 4-Chlorotoluene ND 0.00602 1 04/04/2022 10:28 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477365
B-1-5'
Collected date/time: 03/30/22 08:05
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0301 1 04/04/2022 10:28 WG1842408 1,2-Dibromoethane ND 0.00301 1 04/04/2022 10:28 WG1842408 Dibromomethane ND 0.00602 1 04/04/2022 10:28 WG1842408
1,2-Dichlorobenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 1,3-Dichlorobenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 1,4-Dichlorobenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 Dichlorodifluoromethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,1-Dichloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,2-Dichloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,1-Dichloroethene ND 0.00301 1 04/04/2022 10:28 WG1842408 cis-1,2-Dichloroethene ND 0.00301 1 04/04/2022 10:28 WG1842408 trans-1,2-Dichloroethene ND 0.00602 1 04/04/2022 10:28 WG1842408 1,2-Dichloropropane ND 0.00602 1 04/04/2022 10:28 WG1842408 1,1-Dichloropropene ND 0.00301 1 04/04/2022 10:28 WG1842408 1,3-Dichloropropane ND 0.00602 1 04/04/2022 10:28 WG1842408 cis-1,3-Dichloropropene ND 0.00301 1 04/04/2022 10:28 WG1842408 trans-1,3-Dichloropropene ND 0.00602 1 04/04/2022 10:28 WG1842408 2,2-Dichloropropane ND 0.00301 1 04/04/2022 10:28 WG1842408 Di-isopropyl ether ND 0.00120 1 04/04/2022 10:28 WG1842408 Ethylbenzene ND 0.00301 1 04/04/2022 10:28 WG1842408
Hexachloro-1,3-butadiene ND 0.0301 1 04/04/2022 10:28 WG1842408 Isopropylbenzene ND 0.00301 1 04/04/2022 10:28 WG1842408 p-Isopropyltoluene ND 0.00602 1 04/04/2022 10:28 WG1842408 2-Butanone (MEK) 0.123 0.120 1 04/04/2022 10:28 WG1842408 Methylene Chloride ND 0.0301 1 04/04/2022 10:28 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0301 1 04/04/2022 10:28 WG1842408 Methyl tert-butyl ether ND 0.00120 1 04/04/2022 10:28 WG1842408 Naphthalene ND 0.0151 1 04/04/2022 10:28 WG1842408
n-Propylbenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 Styrene ND 0.0151 1 04/04/2022 10:28 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 Tetrachloroethene ND 0.00301 1 04/04/2022 10:28 WG1842408 Toluene ND 0.00602 1 04/04/2022 10:28 WG1842408
1,2,3-Trichlorobenzene ND 0.0151 1 04/04/2022 10:28 WG1842408 1,2,4-Trichlorobenzene ND 0.0151 1 04/04/2022 10:28 WG1842408 1,1,1-Trichloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,1,2-Trichloroethane ND 0.00301 1 04/04/2022 10:28 WG1842408 Trichloroethene ND 0.00120 1 04/04/2022 10:28 WG1842408 Trichlorofluoromethane ND 0.00301 1 04/04/2022 10:28 WG1842408 1,2,3-Trichloropropane ND 0.0151 1 04/04/2022 10:28 WG1842408 1,2,4-Trimethylbenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 1,2,3-Trimethylbenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 1,3,5-Trimethylbenzene ND 0.00602 1 04/04/2022 10:28 WG1842408 Vinyl chloride ND 0.00301 1 04/04/2022 10:28 WG1842408
Xylenes, Total 0.00825 0.00783 1 04/04/2022 10:28 WG1842408 (S) Toluene-d8 106 75.0-131 04/04/2022 10:28 WG1842408
(S) 4-Bromofluorobenzene 92.9 67.0-138 04/04/2022 10:28 WG1842408 (S) 1,2-Dichloroethane-d4 98.3 70.0-130 04/04/2022 10:28 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7871 of 11211 16 of 34 SAMPLE RESULTS - 04
L1477365
B-1-5'
Collected date/time: 03/30/22 08:05
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.41 1 04/07/2022 04:00 WG1844101 C22-C32 Hydrocarbons 14.1 4.41 1 04/07/2022 04:00 WG1844101 C32-C40 Hydrocarbons 6.90 4.41 1 04/07/2022 04:00 WG1844101 (S) o-Terphenyl 59.1 18.0-148 04/07/2022 04:00 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7872 of 11211 17 of 34 SAMPLE RESULTS - 05
L1477365
B-1-10'
Collected date/time: 03/30/22 08:10
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 93.5 1 04/04/2022 13:38 WG1841822
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 2.90 25.5 04/02/2022 15:52 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 97.7 77.0-120 04/02/2022 15:52 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0580 1.02 04/04/2022 10:47 WG1842408
Acrylonitrile ND 0.0146 1.02 04/04/2022 10:47 WG1842408 Benzene ND 0.00116 1.02 04/04/2022 10:47 WG1842408
Bromobenzene ND 0.0146 1.02 04/04/2022 10:47 WG1842408
Bromodichloromethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Bromoform ND 0.0290 1.02 04/04/2022 10:47 WG1842408
Bromomethane ND 0.0146 1.02 04/04/2022 10:47 WG1842408
n-Butylbenzene ND 0.0146 1.02 04/04/2022 10:47 WG1842408 sec-Butylbenzene ND 0.0146 1.02 04/04/2022 10:47 WG1842408 tert-Butylbenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Carbon tetrachloride ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Chlorobenzene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Chlorodibromomethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Chloroethane ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Chloroform ND 0.00290 1.02 04/04/2022 10:47 WG1842408
Chloromethane ND 0.0146 1.02 04/04/2022 10:47 WG1842408 2-Chlorotoluene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 4-Chlorotoluene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,2-Dibromo-3-Chloropropane ND 0.0290 1.02 04/04/2022 10:47 WG1842408 1,2-Dibromoethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Dibromomethane ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,2-Dichlorobenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,3-Dichlorobenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,4-Dichlorobenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Dichlorodifluoromethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,1-Dichloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,2-Dichloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,1-Dichloroethene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 cis-1,2-Dichloroethene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 trans-1,2-Dichloroethene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,2-Dichloropropane ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,1-Dichloropropene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,3-Dichloropropane ND 0.00580 1.02 04/04/2022 10:47 WG1842408 cis-1,3-Dichloropropene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 trans-1,3-Dichloropropene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 2,2-Dichloropropane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Di-isopropyl ether ND 0.00116 1.02 04/04/2022 10:47 WG1842408 Ethylbenzene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Hexachloro-1,3-butadiene ND 0.0290 1.02 04/04/2022 10:47 WG1842408 Isopropylbenzene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 p-Isopropyltoluene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 2-Butanone (MEK) 0.123 0.116 1.02 04/04/2022 10:47 WG1842408 Methylene Chloride ND 0.0290 1.02 04/04/2022 10:47 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0290 1.02 04/04/2022 10:47 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 18 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7873 of 11211 18 of 34 SAMPLE RESULTS - 05
L1477365
B-1-10'
Collected date/time: 03/30/22 08:10
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00116 1.02 04/04/2022 10:47 WG1842408 Naphthalene ND 0.0146 1.02 04/04/2022 10:47 WG1842408
n-Propylbenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Styrene ND 0.0146 1.02 04/04/2022 10:47 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Tetrachloroethene ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Toluene ND 0.00580 1.02 04/04/2022 10:47 WG1842408
1,2,3-Trichlorobenzene ND 0.0146 1.02 04/04/2022 10:47 WG1842408 1,2,4-Trichlorobenzene ND 0.0146 1.02 04/04/2022 10:47 WG1842408 1,1,1-Trichloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,1,2-Trichloroethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Trichloroethene ND 0.00116 1.02 04/04/2022 10:47 WG1842408 Trichlorofluoromethane ND 0.00290 1.02 04/04/2022 10:47 WG1842408 1,2,3-Trichloropropane ND 0.0146 1.02 04/04/2022 10:47 WG1842408 1,2,4-Trimethylbenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,2,3-Trimethylbenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 1,3,5-Trimethylbenzene ND 0.00580 1.02 04/04/2022 10:47 WG1842408 Vinyl chloride ND 0.00290 1.02 04/04/2022 10:47 WG1842408 Xylenes, Total ND 0.00754 1.02 04/04/2022 10:47 WG1842408 (S) Toluene-d8 102 75.0-131 04/04/2022 10:47 WG1842408
(S) 4-Bromofluorobenzene 88.6 67.0-138 04/04/2022 10:47 WG1842408 (S) 1,2-Dichloroethane-d4 91.6 70.0-130 04/04/2022 10:47 WG1842408 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.28 1 04/07/2022 03:44 WG1844101 C22-C32 Hydrocarbons ND 4.28 1 04/07/2022 03:44 WG1844101 C32-C40 Hydrocarbons ND 4.28 1 04/07/2022 03:44 WG1844101 (S) o-Terphenyl 60.4 18.0-148 04/07/2022 03:44 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 19 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7874 of 11211 19 of 34 SAMPLE RESULTS - 06
L1477365
B-1-15'
Collected date/time: 03/30/22 08:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 97.3 1 04/04/2022 13:38 WG1841822
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 2.64 25 04/02/2022 16:15 WG1842183
(S) a,a,a-Trifluorotoluene(FID) 97.7 77.0-120 04/02/2022 16:15 WG1842183 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND 0.0529 1 04/04/2022 11:06 WG1842408
Acrylonitrile ND 0.0132 1 04/04/2022 11:06 WG1842408
Benzene ND 0.00106 1 04/04/2022 11:06 WG1842408
Bromobenzene ND 0.0132 1 04/04/2022 11:06 WG1842408
Bromodichloromethane ND 0.00264 1 04/04/2022 11:06 WG1842408 Bromoform ND 0.0264 1 04/04/2022 11:06 WG1842408
Bromomethane ND 0.0132 1 04/04/2022 11:06 WG1842408
n-Butylbenzene ND 0.0132 1 04/04/2022 11:06 WG1842408
sec-Butylbenzene ND 0.0132 1 04/04/2022 11:06 WG1842408 tert-Butylbenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 Carbon tetrachloride ND 0.00529 1 04/04/2022 11:06 WG1842408 Chlorobenzene ND 0.00264 1 04/04/2022 11:06 WG1842408
Chlorodibromomethane ND 0.00264 1 04/04/2022 11:06 WG1842408 Chloroethane ND 0.00529 1 04/04/2022 11:06 WG1842408
Chloroform ND 0.00264 1 04/04/2022 11:06 WG1842408
Chloromethane ND 0.0132 1 04/04/2022 11:06 WG1842408
2-Chlorotoluene ND 0.00264 1 04/04/2022 11:06 WG1842408 4-Chlorotoluene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,2-Dibromo-3-Chloropropane ND 0.0264 1 04/04/2022 11:06 WG1842408 1,2-Dibromoethane ND 0.00264 1 04/04/2022 11:06 WG1842408 Dibromomethane ND 0.00529 1 04/04/2022 11:06 WG1842408
1,2-Dichlorobenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,3-Dichlorobenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,4-Dichlorobenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 Dichlorodifluoromethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,1-Dichloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,2-Dichloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,1-Dichloroethene ND 0.00264 1 04/04/2022 11:06 WG1842408 cis-1,2-Dichloroethene ND 0.00264 1 04/04/2022 11:06 WG1842408 trans-1,2-Dichloroethene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,2-Dichloropropane ND 0.00529 1 04/04/2022 11:06 WG1842408 1,1-Dichloropropene ND 0.00264 1 04/04/2022 11:06 WG1842408 1,3-Dichloropropane ND 0.00529 1 04/04/2022 11:06 WG1842408 cis-1,3-Dichloropropene ND 0.00264 1 04/04/2022 11:06 WG1842408 trans-1,3-Dichloropropene ND 0.00529 1 04/04/2022 11:06 WG1842408 2,2-Dichloropropane ND 0.00264 1 04/04/2022 11:06 WG1842408 Di-isopropyl ether ND 0.00106 1 04/04/2022 11:06 WG1842408 Ethylbenzene ND 0.00264 1 04/04/2022 11:06 WG1842408
Hexachloro-1,3-butadiene ND 0.0264 1 04/04/2022 11:06 WG1842408 Isopropylbenzene ND 0.00264 1 04/04/2022 11:06 WG1842408 p-Isopropyltoluene ND 0.00529 1 04/04/2022 11:06 WG1842408 2-Butanone (MEK) ND 0.106 1 04/04/2022 11:06 WG1842408
Methylene Chloride ND 0.0264 1 04/04/2022 11:06 WG1842408 4-Methyl-2-pentanone (MIBK) ND 0.0264 1 04/04/2022 11:06 WG1842408 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 20 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7875 of 11211 20 of 34 SAMPLE RESULTS - 06
L1477365
B-1-15'
Collected date/time: 03/30/22 08:15
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Methyl tert-butyl ether ND 0.00106 1 04/04/2022 11:06 WG1842408 Naphthalene ND 0.0132 1 04/04/2022 11:06 WG1842408
n-Propylbenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 Styrene ND 0.0132 1 04/04/2022 11:06 WG1842408
1,1,1,2-Tetrachloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,1,2,2-Tetrachloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,1,2-Trichlorotrifluoroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 Tetrachloroethene ND 0.00264 1 04/04/2022 11:06 WG1842408 Toluene ND 0.00529 1 04/04/2022 11:06 WG1842408
1,2,3-Trichlorobenzene ND 0.0132 1 04/04/2022 11:06 WG1842408 1,2,4-Trichlorobenzene ND 0.0132 1 04/04/2022 11:06 WG1842408 1,1,1-Trichloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,1,2-Trichloroethane ND 0.00264 1 04/04/2022 11:06 WG1842408 Trichloroethene ND 0.00106 1 04/04/2022 11:06 WG1842408 Trichlorofluoromethane ND 0.00264 1 04/04/2022 11:06 WG1842408 1,2,3-Trichloropropane ND 0.0132 1 04/04/2022 11:06 WG1842408 1,2,4-Trimethylbenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,2,3-Trimethylbenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 1,3,5-Trimethylbenzene ND 0.00529 1 04/04/2022 11:06 WG1842408 Vinyl chloride ND 0.00264 1 04/04/2022 11:06 WG1842408
Xylenes, Total ND 0.00687 1 04/04/2022 11:06 WG1842408
(S) Toluene-d8 106 75.0-131 04/04/2022 11:06 WG1842408
(S) 4-Bromofluorobenzene 89.8 67.0-138 04/04/2022 11:06 WG1842408 (S) 1,2-Dichloroethane-d4 96.0 70.0-130 04/04/2022 11:06 WG1842408 Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.11 1 04/07/2022 03:12 WG1844101 C22-C32 Hydrocarbons ND 4.11 1 04/07/2022 03:12 WG1844101 C32-C40 Hydrocarbons ND 4.11 1 04/07/2022 03:12 WG1844101 (S) o-Terphenyl 59.4 18.0-148 04/07/2022 03:12 WG1844101 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 21 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7876 of 11211 21 of 34 WG1841822 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1477365-01,02,03,04,05,06 Method Blank (MB)
(MB) R3777571-1 04/04/22 13:38
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1477365-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1477365-01 04/04/22 13:38 • (DUP) R3777571-3 04/04/22 13:38 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 93.3 93.0 1 0.301 10
Laboratory Control Sample (LCS)
(LCS) R3777571-2 04/04/22 13:38
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte % % % %
Total Solids 50.0 50.0 100 85.0-115
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 22 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7877 of 11211 22 of 34 WG1842716 QUALITY CONTROL SUMMARY
Mercury by Method 7471A L1477365-03,04
Method Blank (MB)
(MB) R3778120-1 04/06/22 10:01
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Mercury U 0.0180 0.0400
Laboratory Control Sample (LCS)
(LCS) R3778120-2 04/06/22 10:04
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Mercury 0.500 0.485 97.0 80.0-120
L1477357-08 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477357-08 04/06/22 10:11 • (MS) R3778120-3 04/06/22 10:14 • (MSD) R3778120-4 04/06/22 10:16 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Mercury 0.500 0.185 0.594 0.603 81.7 83.6 1 75.0-125 1.57 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 09:33 23 of 34 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7878 of 11211 23 of 34 WG1842556 QUALITY CONTROL SUMMARY
Metals (ICP) by Method 6010B L1477365-03,04
Method Blank (MB)
(MB) R3777506-1 04/04/22 16:58
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Antimony U 0.544 2.00
Arsenic U 0.518 2.00
Barium U 0.0852 0.500
Beryllium U 0.0315 0.200
Cadmium U 0.0471 0.500
Chromium U 0.133 1.00
Cobalt U 0.0811 1.00
Copper U 0.400 2.00
Lead 0.260 J 0.208 0.500
Molybdenum U 0.109 0.500
Nickel U 0.132 2.00
Selenium U 0.764 2.00
Silver U 0.127 1.00
Thallium U 0.394 2.00
Vanadium U 0.506 2.00
Zinc U 0.832 5.00
Laboratory Control Sample (LCS)
(LCS) R3777506-2 04/04/22 17:01
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Antimony 100 86.9 86.9 80.0-120
Arsenic 100 87.8 87.8 80.0-120
Barium 100 93.4 93.4 80.0-120
Beryllium 100 90.6 90.6 80.0-120
Cadmium 100 89.3 89.3 80.0-120
Chromium 100 91.3 91.3 80.0-120
Cobalt 100 93.0 93.0 80.0-120
Copper 100 92.0 92.0 80.0-120
Lead 100 90.6 90.6 80.0-120
Molybdenum 100 93.5 93.5 80.0-120
Nickel 100 90.2 90.2 80.0-120
Selenium 100 91.7 91.7 80.0-120
Silver 20.0 18.4 92.0 80.0-120
Thallium 100 89.4 89.4 80.0-120
Vanadium 100 91.1 91.1 80.0-120
Zinc 100 90.5 90.5 80.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1477365-03,04
L1477601-06 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477601-06 04/04/22 17:04 • (MS) R3777506-5 04/04/22 17:12 • (MSD) R3777506-6 04/04/22 17:15 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Antimony 116 ND 59.3 65.1 51.1 56.1 1 75.0-125 J6 J6 9.25 20 Arsenic 116 2.96 111 105 93.2 87.7 1 75.0-125 5.99 20
Barium 116 41.5 141 127 86.1 73.8 1 75.0-125 J6 10.7 20 Beryllium 116 0.464 99.4 96.8 85.3 83.1 1 75.0-125 2.65 20 Cadmium 116 ND 108 103 93.0 88.9 1 75.0-125 4.52 20
Chromium 116 10.1 109 104 85.3 81.0 1 75.0-125 4.62 20
Cobalt 116 20.0 116 119 83.2 85.1 1 75.0-125 1.87 20
Copper 116 5.37 115 109 94.6 89.3 1 75.0-125 5.47 20
Lead 116 7.37 120 104 97.4 83.7 1 75.0-125 14.1 20
Molybdenum 116 ND 103 102 88.5 87.2 1 75.0-125 1.49 20
Nickel 116 7.62 113 106 91.1 84.7 1 75.0-125 6.81 20
Selenium 116 ND 110 108 95.2 92.7 1 75.0-125 2.65 20
Silver 23.2 ND 22.9 21.6 98.6 93.3 1 75.0-125 5.56 20
Thallium 116 ND 98.6 95.6 84.9 82.4 1 75.0-125 3.08 20
Vanadium 116 18.8 120 112 87.4 80.0 1 75.0-125 7.41 20
Zinc 116 15.4 115 107 86.1 78.6 1 75.0-125 7.84 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC) by Method 8015 L1477365-01,02,03,04,05,06 Method Blank (MB)
(MB) R3777027-3 04/02/22 10:44
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
TPHG C5 - C12 1.21 J 0.830 2.50
(S)
a,a,a-Trifluorotoluene(FID) 97.2 77.0-120
Laboratory Control Sample (LCS)
(LCS) R3777027-2 04/02/22 09:59
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
TPHG C5 - C12 5.50 4.82 87.6 72.0-125
(S)
a,a,a-Trifluorotoluene(FID) 105 77.0-120
L1477183-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477183-01 04/02/22 12:49 • (MS) R3777027-4 04/02/22 18:56 • (MSD) R3777027-5 04/02/22 19:19 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
TPHG C5 - C12 219 6.15 137 167 59.6 73.5 25 10.0-141 19.9 29 (S)
a,a,a-Trifluorotoluene(FID) 99.3 100 77.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477365-01,02,03,04,05,06 Method Blank (MB)
(MB) R3777478-2 04/04/22 07:16
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acetone U 0.0365 0.0500
Acrylonitrile U 0.00361 0.0125
Benzene U 0.000467 0.00100
Bromobenzene U 0.000900 0.0125
Bromodichloromethane U 0.000725 0.00250
Bromoform U 0.00117 0.0250
Bromomethane U 0.00197 0.0125
n-Butylbenzene U 0.00525 0.0125
sec-Butylbenzene U 0.00288 0.0125
tert-Butylbenzene U 0.00195 0.00500
Carbon tetrachloride U 0.000898 0.00500
Chlorobenzene U 0.000210 0.00250
Chlorodibromomethane U 0.000612 0.00250
Chloroethane U 0.00170 0.00500
Chloroform U 0.00103 0.00250
Chloromethane U 0.00435 0.0125
2-Chlorotoluene U 0.000865 0.00250
4-Chlorotoluene U 0.000450 0.00500
1,2-Dibromo-3-Chloropropane U 0.00390 0.0250
1,2-Dibromoethane U 0.000648 0.00250
Dibromomethane U 0.000750 0.00500
1,2-Dichlorobenzene U 0.000425 0.00500
1,3-Dichlorobenzene U 0.000600 0.00500
1,4-Dichlorobenzene U 0.000700 0.00500
Dichlorodifluoromethane U 0.00161 0.00250
1,1-Dichloroethane U 0.000491 0.00250
1,2-Dichloroethane U 0.000649 0.00250
1,1-Dichloroethene U 0.000606 0.00250
cis-1,2-Dichloroethene U 0.000734 0.00250
trans-1,2-Dichloroethene U 0.00104 0.00500
1,2-Dichloropropane U 0.00142 0.00500
1,1-Dichloropropene U 0.000809 0.00250
1,3-Dichloropropane U 0.000501 0.00500
cis-1,3-Dichloropropene U 0.000757 0.00250
trans-1,3-Dichloropropene U 0.00114 0.00500
2,2-Dichloropropane U 0.00138 0.00250
Di-isopropyl ether U 0.000410 0.00100
Ethylbenzene U 0.000737 0.00250
Hexachloro-1,3-butadiene U 0.00600 0.0250
Isopropylbenzene U 0.000425 0.00250
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477365-01,02,03,04,05,06 Method Blank (MB)
(MB) R3777478-2 04/04/22 07:16
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
p-Isopropyltoluene U 0.00255 0.00500
2-Butanone (MEK) U 0.0635 0.100
Methylene Chloride U 0.00664 0.0250
4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250
Methyl tert-butyl ether U 0.000350 0.00100
Naphthalene U 0.00488 0.0125
n-Propylbenzene U 0.000950 0.00500
Styrene U 0.000229 0.0125
1,1,1,2-Tetrachloroethane U 0.000948 0.00250
1,1,2,2-Tetrachloroethane U 0.000695 0.00250
1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250
Tetrachloroethene U 0.000896 0.00250
Toluene U 0.00130 0.00500
1,2,3-Trichlorobenzene U 0.00733 0.0125
1,2,4-Trichlorobenzene U 0.00440 0.0125
1,1,1-Trichloroethane U 0.000923 0.00250
1,1,2-Trichloroethane U 0.000597 0.00250
Trichloroethene U 0.000584 0.00100
Trichlorofluoromethane U 0.000827 0.00250
1,2,3-Trichloropropane U 0.00162 0.0125
1,2,4-Trimethylbenzene U 0.00158 0.00500
1,2,3-Trimethylbenzene U 0.00158 0.00500
1,3,5-Trimethylbenzene U 0.00200 0.00500
Vinyl chloride U 0.00116 0.00250
Xylenes, Total U 0.000880 0.00650
(S) Toluene-d8 98.0 75.0-131
(S) 4-Bromofluorobenzene 106 67.0-138
(S) 1,2-Dichloroethane-d4 99.1 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3777478-1 04/04/22 06:19
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Acetone 0.625 0.681 109 10.0-160
Acrylonitrile 0.625 0.749 120 45.0-153
Benzene 0.125 0.127 102 70.0-123
Bromobenzene 0.125 0.137 110 73.0-121
Bromodichloromethane 0.125 0.126 101 73.0-121
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477365-01,02,03,04,05,06 Laboratory Control Sample (LCS)
(LCS) R3777478-1 04/04/22 06:19
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Bromoform 0.125 0.102 81.6 64.0-132
Bromomethane 0.125 0.121 96.8 56.0-147
n-Butylbenzene 0.125 0.147 118 68.0-135
sec-Butylbenzene 0.125 0.144 115 74.0-130
tert-Butylbenzene 0.125 0.138 110 75.0-127
Carbon tetrachloride 0.125 0.125 100 66.0-128
Chlorobenzene 0.125 0.133 106 76.0-128
Chlorodibromomethane 0.125 0.122 97.6 74.0-127
Chloroethane 0.125 0.125 100 61.0-134
Chloroform 0.125 0.124 99.2 72.0-123
Chloromethane 0.125 0.132 106 51.0-138
2-Chlorotoluene 0.125 0.135 108 75.0-124
4-Chlorotoluene 0.125 0.141 113 75.0-124
1,2-Dibromo-3-Chloropropane 0.125 0.113 90.4 59.0-130
1,2-Dibromoethane 0.125 0.130 104 74.0-128
Dibromomethane 0.125 0.139 111 75.0-122
1,2-Dichlorobenzene 0.125 0.130 104 76.0-124
1,3-Dichlorobenzene 0.125 0.132 106 76.0-125
1,4-Dichlorobenzene 0.125 0.126 101 77.0-121
Dichlorodifluoromethane 0.125 0.151 121 43.0-156
1,1-Dichloroethane 0.125 0.117 93.6 70.0-127
1,2-Dichloroethane 0.125 0.124 99.2 65.0-131
1,1-Dichloroethene 0.125 0.138 110 65.0-131
cis-1,2-Dichloroethene 0.125 0.126 101 73.0-125
trans-1,2-Dichloroethene 0.125 0.129 103 71.0-125
1,2-Dichloropropane 0.125 0.128 102 74.0-125
1,1-Dichloropropene 0.125 0.135 108 73.0-125
1,3-Dichloropropane 0.125 0.136 109 80.0-125
cis-1,3-Dichloropropene 0.125 0.133 106 76.0-127
trans-1,3-Dichloropropene 0.125 0.126 101 73.0-127
2,2-Dichloropropane 0.125 0.107 85.6 59.0-135
Di-isopropyl ether 0.125 0.126 101 60.0-136
Ethylbenzene 0.125 0.145 116 74.0-126
Hexachloro-1,3-butadiene 0.125 0.125 100 57.0-150
Isopropylbenzene 0.125 0.139 111 72.0-127
p-Isopropyltoluene 0.125 0.145 116 72.0-133
2-Butanone (MEK) 0.625 0.726 116 30.0-160
Methylene Chloride 0.125 0.117 93.6 68.0-123
4-Methyl-2-pentanone (MIBK) 0.625 0.760 122 56.0-143
Methyl tert-butyl ether 0.125 0.104 83.2 66.0-132
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477365-01,02,03,04,05,06 Laboratory Control Sample (LCS)
(LCS) R3777478-1 04/04/22 06:19
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Naphthalene 0.125 0.138 110 59.0-130
n-Propylbenzene 0.125 0.151 121 74.0-126
Styrene 0.125 0.126 101 72.0-127
1,1,1,2-Tetrachloroethane 0.125 0.118 94.4 74.0-129
1,1,2,2-Tetrachloroethane 0.125 0.128 102 68.0-128
1,1,2-Trichlorotrifluoroethane 0.125 0.136 109 61.0-139 Tetrachloroethene 0.125 0.143 114 70.0-136
Toluene 0.125 0.134 107 75.0-121
1,2,3-Trichlorobenzene 0.125 0.141 113 59.0-139
1,2,4-Trichlorobenzene 0.125 0.162 130 62.0-137
1,1,1-Trichloroethane 0.125 0.131 105 69.0-126
1,1,2-Trichloroethane 0.125 0.134 107 78.0-123
Trichloroethene 0.125 0.147 118 76.0-126
Trichlorofluoromethane 0.125 0.138 110 61.0-142
1,2,3-Trichloropropane 0.125 0.135 108 67.0-129
1,2,4-Trimethylbenzene 0.125 0.140 112 70.0-126
1,2,3-Trimethylbenzene 0.125 0.133 106 74.0-124
1,3,5-Trimethylbenzene 0.125 0.133 106 73.0-127
Vinyl chloride 0.125 0.134 107 63.0-134
Xylenes, Total 0.375 0.401 107 72.0-127
(S) Toluene-d8 101 75.0-131
(S) 4-Bromofluorobenzene 93.2 67.0-138
(S) 1,2-Dichloroethane-d4 96.2 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 8015 L1477365-01,02,03,04,05,06 Method Blank (MB)
(MB) R3778448-1 04/07/22 01:00
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
C12-C22 Hydrocarbons U 0.733 4.00
C22-C32 Hydrocarbons U 1.33 4.00
C32-C40 Hydrocarbons U 1.33 4.00
(S) o-Terphenyl 57.7 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3778448-2 04/07/22 02:06
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 25.0 14.9 59.6 50.0-150
C22-C32 Hydrocarbons 25.0 14.9 59.6 50.0-150
(S) o-Terphenyl 64.4 18.0-148
L1477365-04 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477365-04 04/07/22 04:00 • (MS) R3778448-3 04/07/22 04:17 • (MSD) R3778448-4 04/07/22 04:34 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
C12-C22 Hydrocarbons 27.6 ND 20.7 21.5 62.3 65.1 1 50.0-150 3.66 20 C22-C32 Hydrocarbons 27.6 14.1 32.3 35.7 66.0 78.4 1 50.0-150 10.0 20 (S) o-Terphenyl 55.1 53.8 18.0-148
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
(dry) Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils].

MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

RDL (dry) Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
J The identification of the analyte is acceptable; the reported value is an estimate.

J6 The sample matrix interfered with the ability to make any accurate determination; spike value is low. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477365 04/07/22 10:33 7887 of 11211 32 of 34 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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ANALYTICAL REPORT
April 19, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1481352
Samples Received: 03/30/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 19, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Ds: Detection Summary 5
Sr: Sample Results 6
B-1-1' L1481352-01 6
B-4-1 L1481352-02 7
COMP 1 L1481352-03 8
COMP 2 L1481352-04 9
COMP 3 L1481352-05 10
COMP 4 L1481352-06 11
Qc: Quality Control Summary 12
Metals (ICP) by Method 6010B 12
Gl: Glossary of Terms 14
Al: Accreditations & Locations 15
Sc: Sample Chain of Custody 16
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-1-1' L1481352-01 GW G. Carr 03/30/22 08:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1847551 1 04/13/22 07:14 04/13/22 07:14 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1850229 9 04/18/22 11:48 04/18/22 20:08 ZSA Mt. Juliet, TN Collected by Collected date/time Received date/time
B-4-1 L1481352-02 GW G. Carr 03/29/22 08:45 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1847551 1 04/13/22 07:14 04/13/22 07:14 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1850229 9 04/18/22 11:48 04/18/22 20:19 ZSA Mt. Juliet, TN Collected by Collected date/time Received date/time
COMP 1 L1481352-03 GW G. Carr 03/30/22 00:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1847551 1 04/13/22 07:14 04/13/22 07:14 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1850229 9 04/18/22 11:48 04/18/22 20:22 ZSA Mt. Juliet, TN Collected by Collected date/time Received date/time
COMP 2 L1481352-04 Waste G. Carr 03/30/22 00:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 1311 WG1847575 1 04/13/22 09:57 04/13/22 09:57 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1848711 1 04/14/22 18:38 04/14/22 23:23 CCE Mt. Juliet, TN Collected by Collected date/time Received date/time
COMP 3 L1481352-05 GW G. Carr 03/30/22 00:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1847551 1 04/13/22 07:14 04/13/22 07:14 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1850229 9 04/18/22 11:48 04/18/22 20:25 ZSA Mt. Juliet, TN Collected by Collected date/time Received date/time
COMP 4 L1481352-06 GW G. Carr 03/30/22 00:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Preparation by Method 22CCRA2 WG1847551 1 04/13/22 07:14 04/13/22 07:14 JWS Mt. Juliet, TN Metals (ICP) by Method 6010B WG1850229 9 04/18/22 11:48 04/18/22 20:28 ZSA Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Sample Delivery Group (SDG) Narrative
Sample quantity was not sufficient.

Batch Method Lab Sample ID
WG1847551 22CCRA2 L1481352-01
Metals (ICP) by Method 6010B
The same analyte is found in the associated blank.

Batch Analyte Lab Sample ID
WG1850229 Chromium L1481352-06
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1481352 04/19/22 16:11 4 of 18 Jordan N Zito
Project Manager
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DETECTION SUMMARY
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l date / time
B-1-1' L1481352-01 Arsenic 845 90.0 9 04/18/2022 20:08 WG1850229 B-4-1 L1481352-02 Lead 2760 54.0 9 04/18/2022 20:19 WG1850229 COMP 1 L1481352-03 Lead 1580 54.0 9 04/18/2022 20:22 WG1850229 COMP 3 L1481352-05 Chromium 505 90.0 9 04/18/2022 20:25 WG1850229 COMP 4 L1481352-06 Chromium 145 B 90.0 9 04/18/2022 20:28 WG1850229 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
B-1-1'
Collected date/time: 03/30/22 08:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 4/13/2022 7:14:04 AM WG1847551
Final pH 6.77 4/13/2022 7:14:04 AM WG1847551
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Arsenic 845 90.0 9 04/18/2022 20:08 WG1850229
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
B-4-1
Collected date/time: 03/29/22 08:45
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 4/13/2022 7:14:04 AM WG1847551
Final pH 5.52 4/13/2022 7:14:04 AM WG1847551
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Lead 2760 54.0 9 04/18/2022 20:19 WG1850229
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
COMP 1
Collected date/time: 03/30/22 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 4/13/2022 7:14:04 AM WG1847551
Final pH 6.69 4/13/2022 7:14:04 AM WG1847551
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Lead 1580 54.0 9 04/18/2022 20:22 WG1850229
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
COMP 2
Collected date/time: 03/30/22 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
TCLP Extraction - 4/13/2022 9:57:54 AM WG1847575
Fluid 1 4/13/2022 9:57:54 AM WG1847575
Initial pH 8.68 4/13/2022 9:57:54 AM WG1847575
Final pH 4.83 4/13/2022 9:57:54 AM WG1847575
Metals (ICP) by Method 6010B
Result Qualifier RDL Limit Dilution Analysis Batch
Analyte mg/l mg/l mg/l date / time
Lead ND 0.100 5 1 04/14/2022 23:23 WG1848711
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
COMP 3
Collected date/time: 03/30/22 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 4/13/2022 7:14:04 AM WG1847551
Final pH 6.31 4/13/2022 7:14:04 AM WG1847551
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Chromium 505 90.0 9 04/18/2022 20:25 WG1850229
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1481352
COMP 4
Collected date/time: 03/30/22 00:00
Preparation by Method 1311/22CCRA2
Result Qualifier Prep Batch
Analyte date / time
STLC Extraction - 4/13/2022 7:14:04 AM WG1847551
Final pH 5.27 4/13/2022 7:14:04 AM WG1847551
Metals (ICP) by Method 6010B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Chromium 145 B 90.0 9 04/18/2022 20:28 WG1850229
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1481352-04
Method Blank (MB)
(MB) R3781325-1 04/14/22 22:10
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/l mg/l mg/l
Lead 0.0461 J 0.0330 0.100
Laboratory Control Sample (LCS)
(LCS) R3781325-2 04/14/22 22:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/l mg/l % %
Lead 10.0 9.47 94.7 80.0-120
L1477564-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477564-02 04/14/22 22:15 • (MS) R3781325-4 04/14/22 22:20 • (MSD) R3781325-5 04/14/22 22:23 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/l mg/l mg/l mg/l % % % % %
Lead 10.0 ND 9.75 9.63 97.5 96.3 1 75.0-125 1.21 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1481352-01,02,03,05,06
Method Blank (MB)
(MB) R3782455-1 04/18/22 20:02
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Arsenic U 39.6 90.0
Chromium 15.2 J 12.6 90.0
Lead U 26.9 54.0
Laboratory Control Sample (LCS)
(LCS) R3782455-2 04/18/22 20:05
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Arsenic 1000 1110 111 80.0-120
Chromium 1000 1090 109 80.0-120
Lead 1000 1100 110 80.0-120
L1481352-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1481352-01 04/18/22 20:08 • (MS) R3782455-4 04/18/22 20:13 • (MSD) R3782455-5 04/18/22 20:16 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l ug/l % % % % %
Arsenic 9000 845 11100 11000 114 113 9 75.0-125 0.994 20 Chromium 9000 281 9990 10100 108 109 9 75.0-125 0.717 20 Lead 9000 3190 13100 13100 110 110 9 75.0-125 0.00321 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
B The same analyte is found in the associated blank.

J The identification of the analyte is acceptable; the reported value is an estimate. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1481352 04/19/22 16:24 7903 of 11211 14 of 18 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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7906 of 11211
7907 of 11211

ANALYTICAL REPORT
April 07, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1477347
Samples Received: 03/31/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 07, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Ds: Detection Summary 5
Sr: Sample Results 6
IDW-SOIL L1477347-01 6
Qc: Quality Control Summary 9
Total Solids by Method 2540 G-2011 9
Mercury by Method 7471A 10
Metals (ICP) by Method 6010B 11
Volatile Organic Compounds (GC) by Method 8015 13
Volatile Organic Compounds (GC/MS) by Method 8260B 14
Semi-Volatile Organic Compounds (GC) by Method 8015 20
Gl: Glossary of Terms 21
Al: Accreditations & Locations 22
Sc: Sample Chain of Custody 23
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
IDW-SOIL L1477347-01 Solid G. Carr 03/30/22 10:00 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1841898 1 04/02/22 06:38 04/02/22 06:50 KDW Mt. Juliet, TN Mercury by Method 7471A WG1843224 1 04/05/22 12:55 04/06/22 09:42 ABL Mt. Juliet, TN Metals (ICP) by Method 6010B WG1842558 1 04/04/22 17:10 04/07/22 09:35 ZSA Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1843765 25 03/30/22 10:00 04/06/22 09:01 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1843690 1 03/30/22 10:00 04/05/22 23:02 BMB Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1842912 1 04/05/22 05:26 04/06/22 02:41 JAS Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Metals (ICP) by Method 6010B
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1842558 (MS) R3778700-5, (MSD) R3778700-6 Antimony
Volatile Organic Compounds (GC/MS) by Method 8260B
The associated batch QC was above the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1843690 (LCS) R3777929-1, (LCSD)
R3777929-2, L1477347-01
2-Butanone (MEK), Acetone, Acrylonitrile and Di-isopropyl ether The sample matrix interfered with the ability to make any accurate determination; spike value is high.

Batch Lab Sample ID Analytes
WG1843690 (MS) R3777929-4, (MSD) R3777929-5 Acrylonitrile 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477347 04/07/22 16:35 4 of 23 Jordan N Zito
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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DETECTION SUMMARY
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time IDW-SOIL L1477347-01 Mercury 0.261 0.0486 1 04/06/2022 09:42 WG1843224 Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time IDW-SOIL L1477347-01 Barium 150 0.608 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Beryllium 0.265 0.243 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Chromium 145 1.22 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Cobalt 23.9 1.22 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Copper 38.5 2.43 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Lead 8.42 0.608 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Nickel 163 2.43 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Vanadium 88.0 2.43 1 04/07/2022 09:35 WG1842558 IDW-SOIL L1477347-01 Zinc 58.6 6.08 1 04/07/2022 09:35 WG1842558 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time IDW-SOIL L1477347-01 2-Butanone (MEK) 0.165 J4 0.150 1 04/05/2022 23:02 WG1843690 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477347

IDW-SOIL
Collected date/time: 03/30/22 10:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 82.2 1 04/02/2022 06:50 WG1841898
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.261 0.0486 1 04/06/2022 09:42 WG1843224
Metals (ICP) by Method 6010B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 2.43 1 04/07/2022 09:35 WG1842558
Arsenic ND 2.43 1 04/07/2022 09:35 WG1842558
Barium 150 0.608 1 04/07/2022 09:35 WG1842558
Beryllium 0.265 0.243 1 04/07/2022 09:35 WG1842558
Cadmium ND 0.608 1 04/07/2022 09:35 WG1842558
Chromium 145 1.22 1 04/07/2022 09:35 WG1842558
Cobalt 23.9 1.22 1 04/07/2022 09:35 WG1842558
Copper 38.5 2.43 1 04/07/2022 09:35 WG1842558
Lead 8.42 0.608 1 04/07/2022 09:35 WG1842558
Molybdenum ND 0.608 1 04/07/2022 09:35 WG1842558
Nickel 163 2.43 1 04/07/2022 09:35 WG1842558
Selenium ND 2.43 1 04/07/2022 09:35 WG1842558
Silver ND 1.22 1 04/07/2022 09:35 WG1842558
Thallium ND 2.43 1 04/07/2022 09:35 WG1842558
Vanadium 88.0 2.43 1 04/07/2022 09:35 WG1842558
Zinc 58.6 6.08 1 04/07/2022 09:35 WG1842558
Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
TPHG C5 - C12 ND 3.75 25 04/06/2022 09:01 WG1843765
(S) a,a,a-Trifluorotoluene(FID) 95.0 77.0-120 04/06/2022 09:01 WG1843765 Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acetone ND J4 0.0750 1 04/05/2022 23:02 WG1843690
Acrylonitrile ND J4 0.0187 1 04/05/2022 23:02 WG1843690 Benzene ND 0.00150 1 04/05/2022 23:02 WG1843690
Bromobenzene ND 0.0187 1 04/05/2022 23:02 WG1843690
Bromodichloromethane ND 0.00375 1 04/05/2022 23:02 WG1843690 Bromoform ND 0.0375 1 04/05/2022 23:02 WG1843690
Bromomethane ND 0.0187 1 04/05/2022 23:02 WG1843690
n-Butylbenzene ND 0.0187 1 04/05/2022 23:02 WG1843690
sec-Butylbenzene ND 0.0187 1 04/05/2022 23:02 WG1843690 tert-Butylbenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 Carbon tetrachloride ND 0.00750 1 04/05/2022 23:02 WG1843690 Chlorobenzene ND 0.00375 1 04/05/2022 23:02 WG1843690
Chlorodibromomethane ND 0.00375 1 04/05/2022 23:02 WG1843690 Chloroethane ND 0.00750 1 04/05/2022 23:02 WG1843690
Chloroform ND 0.00375 1 04/05/2022 23:02 WG1843690
Chloromethane ND 0.0187 1 04/05/2022 23:02 WG1843690
2-Chlorotoluene ND 0.00375 1 04/05/2022 23:02 WG1843690 4-Chlorotoluene ND 0.00750 1 04/05/2022 23:02 WG1843690 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477347

IDW-SOIL
Collected date/time: 03/30/22 10:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
1,2-Dibromo-3-Chloropropane ND 0.0375 1 04/05/2022 23:02 WG1843690 1,2-Dibromoethane ND 0.00375 1 04/05/2022 23:02 WG1843690 Dibromomethane ND 0.00750 1 04/05/2022 23:02 WG1843690
1,2-Dichlorobenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 1,3-Dichlorobenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 1,4-Dichlorobenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 Dichlorodifluoromethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,1-Dichloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,2-Dichloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,1-Dichloroethene ND 0.00375 1 04/05/2022 23:02 WG1843690 cis-1,2-Dichloroethene ND 0.00375 1 04/05/2022 23:02 WG1843690 trans-1,2-Dichloroethene ND 0.00750 1 04/05/2022 23:02 WG1843690 1,2-Dichloropropane ND 0.00750 1 04/05/2022 23:02 WG1843690 1,1-Dichloropropene ND 0.00375 1 04/05/2022 23:02 WG1843690 1,3-Dichloropropane ND 0.00750 1 04/05/2022 23:02 WG1843690 cis-1,3-Dichloropropene ND 0.00375 1 04/05/2022 23:02 WG1843690 trans-1,3-Dichloropropene ND 0.00750 1 04/05/2022 23:02 WG1843690 2,2-Dichloropropane ND 0.00375 1 04/05/2022 23:02 WG1843690 Di-isopropyl ether ND J4 0.00150 1 04/05/2022 23:02 WG1843690 Ethylbenzene ND 0.00375 1 04/05/2022 23:02 WG1843690
Hexachloro-1,3-butadiene ND 0.0375 1 04/05/2022 23:02 WG1843690 Isopropylbenzene ND 0.00375 1 04/05/2022 23:02 WG1843690 p-Isopropyltoluene ND 0.00750 1 04/05/2022 23:02 WG1843690 2-Butanone (MEK) 0.165 J4 0.150 1 04/05/2022 23:02 WG1843690 Methylene Chloride ND 0.0375 1 04/05/2022 23:02 WG1843690 4-Methyl-2-pentanone (MIBK) ND 0.0375 1 04/05/2022 23:02 WG1843690 Methyl tert-butyl ether ND 0.00150 1 04/05/2022 23:02 WG1843690 Naphthalene ND 0.0187 1 04/05/2022 23:02 WG1843690
n-Propylbenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 Styrene ND 0.0187 1 04/05/2022 23:02 WG1843690
1,1,1,2-Tetrachloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,1,2,2-Tetrachloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,1,2-Trichlorotrifluoroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 Tetrachloroethene ND 0.00375 1 04/05/2022 23:02 WG1843690 Toluene ND 0.00750 1 04/05/2022 23:02 WG1843690
1,2,3-Trichlorobenzene ND 0.0187 1 04/05/2022 23:02 WG1843690 1,2,4-Trichlorobenzene ND 0.0187 1 04/05/2022 23:02 WG1843690 1,1,1-Trichloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,1,2-Trichloroethane ND 0.00375 1 04/05/2022 23:02 WG1843690 Trichloroethene ND 0.00150 1 04/05/2022 23:02 WG1843690 Trichlorofluoromethane ND 0.00375 1 04/05/2022 23:02 WG1843690 1,2,3-Trichloropropane ND 0.0187 1 04/05/2022 23:02 WG1843690 1,2,4-Trimethylbenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 1,2,3-Trimethylbenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 1,3,5-Trimethylbenzene ND 0.00750 1 04/05/2022 23:02 WG1843690 Vinyl chloride ND 0.00375 1 04/05/2022 23:02 WG1843690
Xylenes, Total ND 0.00974 1 04/05/2022 23:02 WG1843690
(S) Toluene-d8 106 75.0-131 04/05/2022 23:02 WG1843690
(S) 4-Bromofluorobenzene 96.0 67.0-138 04/05/2022 23:02 WG1843690 (S) 1,2-Dichloroethane-d4 106 70.0-130 04/05/2022 23:02 WG1843690 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477347

IDW-SOIL
Collected date/time: 03/30/22 10:00
Semi-Volatile Organic Compounds (GC) by Method 8015
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
C12-C22 Hydrocarbons ND 4.86 1 04/06/2022 02:41 WG1842912 C22-C32 Hydrocarbons ND 4.86 1 04/06/2022 02:41 WG1842912 C32-C40 Hydrocarbons ND 4.86 1 04/06/2022 02:41 WG1842912 (S) o-Terphenyl 66.9 18.0-148 04/06/2022 02:41 WG1842912 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477347 04/08/22 08:14 7915 of 11211 8 of 23 WG1841898 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1477347-01
Method Blank (MB)
(MB) R3777126-1 04/02/22 06:50
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1477385-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1477385-01 04/02/22 06:50 • (DUP) R3777126-3 04/02/22 06:50 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 84.9 84.9 1 0.0763 10
Laboratory Control Sample (LCS)
(LCS) R3777126-2 04/02/22 06:50
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte % % % %
Total Solids 50.0 50.0 100 85.0-115
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Mercury by Method 7471A L1477347-01
Method Blank (MB)
(MB) R3778249-4 04/06/22 10:46
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Mercury U 0.0180 0.0400
Laboratory Control Sample (LCS)
(LCS) R3778249-3 04/06/22 10:44
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Mercury 0.500 0.540 108 80.0-120
L1476880-04 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476880-04 04/06/22 10:42 • (MS) R3778249-2 04/06/22 10:39 • (MSD) R3778249-1 04/06/22 10:37 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Mercury 0.500 0.0850 0.560 0.529 95.1 88.7 1 75.0-125 5.83 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1477347-01
Method Blank (MB)
(MB) R3778700-1 04/07/22 08:27
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Antimony U 0.544 2.00
Arsenic U 0.518 2.00
Barium U 0.0852 0.500
Beryllium U 0.0315 0.200
Cadmium U 0.0471 0.500
Chromium U 0.133 1.00
Cobalt U 0.0811 1.00
Copper U 0.400 2.00
Lead U 0.208 0.500
Molybdenum U 0.109 0.500
Nickel U 0.132 2.00
Selenium U 0.764 2.00
Silver U 0.127 1.00
Thallium U 0.394 2.00
Vanadium U 0.506 2.00
Zinc U 0.832 5.00
Laboratory Control Sample (LCS)
(LCS) R3778700-2 04/07/22 08:29
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Antimony 100 92.6 92.6 80.0-120
Arsenic 100 91.3 91.3 80.0-120
Barium 100 95.9 95.9 80.0-120
Beryllium 100 93.5 93.5 80.0-120
Cadmium 100 90.9 90.9 80.0-120
Chromium 100 91.6 91.6 80.0-120
Cobalt 100 93.3 93.3 80.0-120
Copper 100 93.3 93.3 80.0-120
Lead 100 93.1 93.1 80.0-120
Molybdenum 100 96.8 96.8 80.0-120
Nickel 100 93.3 93.3 80.0-120
Selenium 100 91.3 91.3 80.0-120
Silver 20.0 16.6 83.2 80.0-120
Thallium 100 93.9 93.9 80.0-120
Vanadium 100 94.0 94.0 80.0-120
Zinc 100 90.7 90.7 80.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Metals (ICP) by Method 6010B L1477347-01
L1477952-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477952-01 04/07/22 08:32 • (MS) R3778700-5 04/07/22 08:40 • (MSD) R3778700-6 04/07/22 08:42 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Antimony 113 ND 45.8 42.9 40.4 37.9 1 75.0-125 J6 J6 6.49 20 Arsenic 113 ND 102 97.6 89.0 85.2 1 75.0-125 4.36 20
Barium 113 353 452 476 87.8 109 1 75.0-125 5.10 20
Beryllium 113 ND 102 98.5 89.8 86.7 1 75.0-125 3.44 20
Cadmium 113 ND 102 98.6 89.8 86.7 1 75.0-125 3.53 20
Chromium 113 42.1 151 148 96.2 93.6 1 75.0-125 1.95 20
Cobalt 113 11.4 118 113 94.3 89.8 1 75.0-125 4.44 20
Copper 113 46.5 150 140 91.2 82.3 1 75.0-125 6.97 20
Lead 113 16.9 123 120 93.3 91.4 1 75.0-125 1.85 20
Molybdenum 113 2.60 105 101 90.3 86.7 1 75.0-125 3.99 20 Nickel 113 44.3 156 150 98.7 92.9 1 75.0-125 4.35 20
Selenium 113 ND 101 97.2 88.9 85.8 1 75.0-125 3.59 20
Silver 22.7 ND 18.5 17.8 81.5 78.7 1 75.0-125 3.58 20
Thallium 113 ND 103 99.5 90.6 87.8 1 75.0-125 3.20 20
Vanadium 113 52.3 155 150 91.0 86.6 1 75.0-125 3.27 20
Zinc 113 92.9 233 199 124 93.6 1 75.0-125 15.9 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC) by Method 8015 L1477347-01 Method Blank (MB)
(MB) R3778045-3 04/06/22 06:04
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
TPHG C5 - C12 1.12 J 0.830 2.50
(S)
a,a,a-Trifluorotoluene(FID) 95.1 77.0-120
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3778045-1 04/06/22 03:46 • (LCSD) R3778045-2 04/06/22 04:32 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
TPHG C5 - C12 5.50 4.69 4.80 85.3 87.3 72.0-125 2.32 20 (S)
a,a,a-Trifluorotoluene(FID) 98.1 98.3 77.0-120
L1477844-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1477844-01 04/06/22 09:48 • (MS) R3778045-4 04/06/22 14:47 • (MSD) R3778045-5 04/06/22 15:10 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
TPHG C5 - C12 129 13.5 140 126 98.1 87.2 25 10.0-141 10.5 29 (S)
a,a,a-Trifluorotoluene(FID) 100 99.7 77.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 Method Blank (MB)
(MB) R3777929-3 04/05/22 19:39
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acetone U 0.0365 0.0500
Acrylonitrile U 0.00361 0.0125
Benzene U 0.000467 0.00100
Bromobenzene U 0.000900 0.0125
Bromodichloromethane U 0.000725 0.00250
Bromoform U 0.00117 0.0250
Bromomethane U 0.00197 0.0125
n-Butylbenzene U 0.00525 0.0125
sec-Butylbenzene U 0.00288 0.0125
tert-Butylbenzene U 0.00195 0.00500
Carbon tetrachloride U 0.000898 0.00500
Chlorobenzene U 0.000210 0.00250
Chlorodibromomethane U 0.000612 0.00250
Chloroethane U 0.00170 0.00500
Chloroform U 0.00103 0.00250
Chloromethane U 0.00435 0.0125
2-Chlorotoluene U 0.000865 0.00250
4-Chlorotoluene U 0.000450 0.00500
1,2-Dibromo-3-Chloropropane U 0.00390 0.0250
1,2-Dibromoethane U 0.000648 0.00250
Dibromomethane U 0.000750 0.00500
1,2-Dichlorobenzene U 0.000425 0.00500
1,3-Dichlorobenzene U 0.000600 0.00500
1,4-Dichlorobenzene U 0.000700 0.00500
Dichlorodifluoromethane U 0.00161 0.00250
1,1-Dichloroethane U 0.000491 0.00250
1,2-Dichloroethane U 0.000649 0.00250
1,1-Dichloroethene U 0.000606 0.00250
cis-1,2-Dichloroethene U 0.000734 0.00250
trans-1,2-Dichloroethene U 0.00104 0.00500
1,2-Dichloropropane U 0.00142 0.00500
1,1-Dichloropropene U 0.000809 0.00250
1,3-Dichloropropane U 0.000501 0.00500
cis-1,3-Dichloropropene U 0.000757 0.00250
trans-1,3-Dichloropropene U 0.00114 0.00500
2,2-Dichloropropane U 0.00138 0.00250
Di-isopropyl ether U 0.000410 0.00100
Ethylbenzene U 0.000737 0.00250
Hexachloro-1,3-butadiene U 0.00600 0.0250
Isopropylbenzene U 0.000425 0.00250
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 Method Blank (MB)
(MB) R3777929-3 04/05/22 19:39
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
p-Isopropyltoluene U 0.00255 0.00500
2-Butanone (MEK) U 0.0635 0.100
Methylene Chloride U 0.00664 0.0250
4-Methyl-2-pentanone (MIBK) U 0.00228 0.0250
Methyl tert-butyl ether U 0.000350 0.00100
Naphthalene U 0.00488 0.0125
n-Propylbenzene U 0.000950 0.00500
Styrene U 0.000229 0.0125
1,1,1,2-Tetrachloroethane U 0.000948 0.00250
1,1,2,2-Tetrachloroethane U 0.000695 0.00250
1,1,2-Trichlorotrifluoroethane U 0.000754 0.00250
Tetrachloroethene U 0.000896 0.00250
Toluene U 0.00130 0.00500
1,2,3-Trichlorobenzene U 0.00733 0.0125
1,2,4-Trichlorobenzene U 0.00440 0.0125
1,1,1-Trichloroethane U 0.000923 0.00250
1,1,2-Trichloroethane U 0.000597 0.00250
Trichloroethene U 0.000584 0.00100
Trichlorofluoromethane U 0.000827 0.00250
1,2,3-Trichloropropane U 0.00162 0.0125
1,2,4-Trimethylbenzene U 0.00158 0.00500
1,2,3-Trimethylbenzene U 0.00158 0.00500
1,3,5-Trimethylbenzene U 0.00200 0.00500
Vinyl chloride U 0.00116 0.00250
Xylenes, Total U 0.000880 0.00650
(S) Toluene-d8 106 75.0-131
(S) 4-Bromofluorobenzene 96.7 67.0-138
(S) 1,2-Dichloroethane-d4 111 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777929-1 04/05/22 18:24 • (LCSD) R3777929-2 04/05/22 18:43 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Acetone 0.625 1.26 1.29 202 206 10.0-160 J4 J4 2.35 31
Acrylonitrile 0.625 1.14 1.17 182 187 45.0-153 J4 J4 2.60 22 Benzene 0.125 0.116 0.118 92.8 94.4 70.0-123 1.71 20
Bromobenzene 0.125 0.115 0.121 92.0 96.8 73.0-121 5.08 20 Bromodichloromethane 0.125 0.117 0.118 93.6 94.4 73.0-121 0.851 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777929-1 04/05/22 18:24 • (LCSD) R3777929-2 04/05/22 18:43 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Bromoform 0.125 0.106 0.108 84.8 86.4 64.0-132 1.87 20
Bromomethane 0.125 0.0916 0.0968 73.3 77.4 56.0-147 5.52 20 n-Butylbenzene 0.125 0.103 0.110 82.4 88.0 68.0-135 6.57 20 sec-Butylbenzene 0.125 0.114 0.119 91.2 95.2 74.0-130 4.29 20 tert-Butylbenzene 0.125 0.112 0.117 89.6 93.6 75.0-127 4.37 20 Carbon tetrachloride 0.125 0.122 0.125 97.6 100 66.0-128 2.43 20 Chlorobenzene 0.125 0.118 0.121 94.4 96.8 76.0-128 2.51 20 Chlorodibromomethane 0.125 0.122 0.121 97.6 96.8 74.0-127 0.823 20 Chloroethane 0.125 0.109 0.113 87.2 90.4 61.0-134 3.60 20 Chloroform 0.125 0.118 0.119 94.4 95.2 72.0-123 0.844 20 Chloromethane 0.125 0.162 0.172 130 138 51.0-138 5.99 20 2-Chlorotoluene 0.125 0.121 0.131 96.8 105 75.0-124 7.94 20 4-Chlorotoluene 0.125 0.113 0.119 90.4 95.2 75.0-124 5.17 20 1,2-Dibromo-3-Chloropropane 0.125 0.117 0.119 93.6 95.2 59.0-130 1.69 20 1,2-Dibromoethane 0.125 0.127 0.127 102 102 74.0-128 0.000 20 Dibromomethane 0.125 0.121 0.123 96.8 98.4 75.0-122 1.64 20 1,2-Dichlorobenzene 0.125 0.116 0.117 92.8 93.6 76.0-124 0.858 20 1,3-Dichlorobenzene 0.125 0.118 0.121 94.4 96.8 76.0-125 2.51 20 1,4-Dichlorobenzene 0.125 0.107 0.109 85.6 87.2 77.0-121 1.85 20 Dichlorodifluoromethane 0.125 0.106 0.111 84.8 88.8 43.0-156 4.61 20 1,1-Dichloroethane 0.125 0.139 0.144 111 115 70.0-127 3.53 20 1,2-Dichloroethane 0.125 0.133 0.132 106 106 65.0-131 0.755 20 1,1-Dichloroethene 0.125 0.140 0.142 112 114 65.0-131 1.42 20 cis-1,2-Dichloroethene 0.125 0.115 0.115 92.0 92.0 73.0-125 0.000 20 trans-1,2-Dichloroethene 0.125 0.117 0.122 93.6 97.6 71.0-125 4.18 20 1,2-Dichloropropane 0.125 0.143 0.145 114 116 74.0-125 1.39 20 1,1-Dichloropropene 0.125 0.119 0.127 95.2 102 73.0-125 6.50 20 1,3-Dichloropropane 0.125 0.123 0.124 98.4 99.2 80.0-125 0.810 20 cis-1,3-Dichloropropene 0.125 0.119 0.120 95.2 96.0 76.0-127 0.837 20 trans-1,3-Dichloropropene 0.125 0.116 0.118 92.8 94.4 73.0-127 1.71 20 2,2-Dichloropropane 0.125 0.146 0.142 117 114 59.0-135 2.78 20 Di-isopropyl ether 0.125 0.169 0.172 135 138 60.0-136 J4 1.76 20 Ethylbenzene 0.125 0.106 0.114 84.8 91.2 74.0-126 7.27 20 Hexachloro-1,3-butadiene 0.125 0.110 0.112 88.0 89.6 57.0-150 1.80 20 Isopropylbenzene 0.125 0.109 0.116 87.2 92.8 72.0-127 6.22 20 p-Isopropyltoluene 0.125 0.109 0.116 87.2 92.8 72.0-133 6.22 20 2-Butanone (MEK) 0.625 1.15 1.13 184 181 30.0-160 J4 J4 1.75 24 Methylene Chloride 0.125 0.123 0.124 98.4 99.2 68.0-123 0.810 20 4-Methyl-2-pentanone (MIBK) 0.625 0.866 0.869 139 139 56.0-143 0.346 20 Methyl tert-butyl ether 0.125 0.140 0.134 112 107 66.0-132 4.38 20 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777929-1 04/05/22 18:24 • (LCSD) R3777929-2 04/05/22 18:43 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg % % % % %
Naphthalene 0.125 0.0978 0.106 78.2 84.8 59.0-130 8.05 20 n-Propylbenzene 0.125 0.117 0.123 93.6 98.4 74.0-126 5.00 20 Styrene 0.125 0.105 0.108 84.0 86.4 72.0-127 2.82 20
1,1,1,2-Tetrachloroethane 0.125 0.121 0.122 96.8 97.6 74.0-129 0.823 20 1,1,2,2-Tetrachloroethane 0.125 0.132 0.136 106 109 68.0-128 2.99 20 1,1,2-Trichlorotrifluoroethane 0.125 0.108 0.113 86.4 90.4 61.0-139 4.52 20 Tetrachloroethene 0.125 0.110 0.116 88.0 92.8 70.0-136 5.31 20 Toluene 0.125 0.116 0.120 92.8 96.0 75.0-121 3.39 20
1,2,3-Trichlorobenzene 0.125 0.0950 0.108 76.0 86.4 59.0-139 12.8 20 1,2,4-Trichlorobenzene 0.125 0.102 0.105 81.6 84.0 62.0-137 2.90 20 1,1,1-Trichloroethane 0.125 0.126 0.132 101 106 69.0-126 4.65 20 1,1,2-Trichloroethane 0.125 0.125 0.118 100 94.4 78.0-123 5.76 20 Trichloroethene 0.125 0.122 0.126 97.6 101 76.0-126 3.23 20 Trichlorofluoromethane 0.125 0.0860 0.0905 68.8 72.4 61.0-142 5.10 20 1,2,3-Trichloropropane 0.125 0.142 0.143 114 114 67.0-129 0.702 20 1,2,4-Trimethylbenzene 0.125 0.109 0.118 87.2 94.4 70.0-126 7.93 20 1,2,3-Trimethylbenzene 0.125 0.115 0.121 92.0 96.8 74.0-124 5.08 20 1,3,5-Trimethylbenzene 0.125 0.120 0.121 96.0 96.8 73.0-127 0.830 20 Vinyl chloride 0.125 0.126 0.131 101 105 63.0-134 3.89 20 Xylenes, Total 0.375 0.342 0.352 91.2 93.9 72.0-127 2.88 20 (S) Toluene-d8 105 104 75.0-131
(S) 4-Bromofluorobenzene 96.6 97.1 67.0-138
(S) 1,2-Dichloroethane-d4 111 111 70.0-130
L1478343-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1478343-01 04/05/22 20:30 • (MS) R3777929-4 04/06/22 02:48 • (MSD) R3777929-5 04/06/22 03:08 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Acetone 0.563 ND 0.432 0.508 76.7 90.2 1 10.0-160 16.2 40 Acrylonitrile 0.563 ND 0.935 1.02 166 181 1 10.0-160 J5 J5 8.70 40 Benzene 0.113 ND 0.0777 0.0818 68.8 72.4 1 10.0-149 5.14 37 Bromobenzene 0.113 ND 0.0918 0.0935 81.2 82.7 1 10.0-156 1.83 38 Bromodichloromethane 0.113 ND 0.0922 0.0942 81.6 83.4 1 10.0-143 2.15 37 Bromoform 0.113 ND 0.0901 0.0941 79.7 83.3 1 10.0-146 4.34 36 Bromomethane 0.113 ND 0.0513 0.0494 45.4 43.7 1 10.0-149 3.77 38 n-Butylbenzene 0.113 ND 0.0892 0.0895 78.9 79.2 1 10.0-160 0.336 40 sec-Butylbenzene 0.113 ND 0.0924 0.0946 81.8 83.7 1 10.0-159 2.35 39 tert-Butylbenzene 0.113 ND 0.0886 0.0878 78.4 77.7 1 10.0-156 0.907 39 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 L1478343-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1478343-01 04/05/22 20:30 • (MS) R3777929-4 04/06/22 02:48 • (MSD) R3777929-5 04/06/22 03:08 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
Carbon tetrachloride 0.113 ND 0.0749 0.0844 66.3 74.7 1 10.0-145 11.9 37 Chlorobenzene 0.113 ND 0.0875 0.0886 77.4 78.4 1 10.0-152 1.25 39 Chlorodibromomethane 0.113 ND 0.102 0.0992 90.3 87.8 1 10.0-146 2.78 37 Chloroethane 0.113 ND 0.0420 0.0450 37.2 39.8 1 10.0-146 6.90 40 Chloroform 0.113 ND 0.0845 0.0881 74.8 78.0 1 10.0-146 4.17 37 Chloromethane 0.113 ND 0.0941 0.106 83.3 93.8 1 10.0-159 11.9 37 2-Chlorotoluene 0.113 ND 0.0927 0.0950 82.0 84.1 1 10.0-159 2.45 38 4-Chlorotoluene 0.113 ND 0.0857 0.0888 75.8 78.6 1 10.0-155 3.55 39 1,2-Dibromo-3-Chloropropane 0.113 ND 0.0836 0.0846 74.0 74.9 1 10.0-151 1.19 39 1,2-Dibromoethane 0.113 ND 0.111 0.107 98.2 94.7 1 10.0-148 3.67 34 Dibromomethane 0.113 ND 0.102 0.104 90.3 92.0 1 10.0-147 1.94 35 1,2-Dichlorobenzene 0.113 ND 0.0962 0.103 85.1 91.2 1 10.0-155 6.83 37 1,3-Dichlorobenzene 0.113 ND 0.0937 0.0974 82.9 86.2 1 10.0-153 3.87 38 1,4-Dichlorobenzene 0.113 ND 0.0875 0.0912 77.4 80.7 1 10.0-151 4.14 38 Dichlorodifluoromethane 0.113 ND 0.0529 0.0619 46.8 54.8 1 10.0-160 15.7 35 1,1-Dichloroethane 0.113 ND 0.0939 0.101 83.1 89.4 1 10.0-147 7.29 37 1,2-Dichloroethane 0.113 ND 0.111 0.117 98.2 104 1 10.0-148 5.26 35 1,1-Dichloroethene 0.113 ND 0.0778 0.0868 68.8 76.8 1 10.0-155 10.9 37 cis-1,2-Dichloroethene 0.113 ND 0.0790 0.0832 69.9 73.6 1 10.0-149 5.18 37 trans-1,2-Dichloroethene 0.113 ND 0.0726 0.0765 64.2 67.7 1 10.0-150 5.23 37 1,2-Dichloropropane 0.113 ND 0.107 0.114 94.7 101 1 10.0-148 6.33 37 1,1-Dichloropropene 0.113 ND 0.0690 0.0770 61.1 68.1 1 10.0-153 11.0 35 1,3-Dichloropropane 0.113 ND 0.108 0.110 95.6 97.3 1 10.0-154 1.83 35 cis-1,3-Dichloropropene 0.113 ND 0.0928 0.0970 82.1 85.8 1 10.0-151 4.43 37 trans-1,3-Dichloropropene 0.113 ND 0.101 0.0987 89.4 87.3 1 10.0-148 2.30 37 2,2-Dichloropropane 0.113 ND 0.0787 0.0827 69.6 73.2 1 10.0-138 4.96 36 Di-isopropyl ether 0.113 ND 0.137 0.144 121 127 1 10.0-147 4.98 36 Ethylbenzene 0.113 ND 0.0790 0.0781 69.9 69.1 1 10.0-160 1.15 38 Hexachloro-1,3-butadiene 0.113 ND 0.108 0.112 95.6 99.1 1 10.0-160 3.64 40 Isopropylbenzene 0.113 ND 0.0813 0.0820 71.9 72.6 1 10.0-155 0.857 38 p-Isopropyltoluene 0.113 ND 0.0895 0.0912 79.2 80.7 1 10.0-160 1.88 40 2-Butanone (MEK) 0.563 ND 0.676 0.622 120 110 1 10.0-160 8.32 40 Methylene Chloride 0.113 ND 0.0923 0.0984 81.7 87.1 1 10.0-141 6.40 37 4-Methyl-2-pentanone (MIBK) 0.563 ND 0.719 0.735 128 131 1 10.0-160 2.20 35 Methyl tert-butyl ether 0.113 ND 0.119 0.121 105 107 1 11.0-147 1.67 35 Naphthalene 0.113 ND 0.0939 0.0983 83.1 87.0 1 10.0-160 4.58 36 n-Propylbenzene 0.113 ND 0.0859 0.0873 76.0 77.3 1 10.0-158 1.62 38 Styrene 0.113 ND 0.0763 0.0789 67.5 69.8 1 10.0-160 3.35 40 1,1,1,2-Tetrachloroethane 0.113 ND 0.0922 0.0957 81.6 84.7 1 10.0-149 3.73 39 1,1,2,2-Tetrachloroethane 0.113 ND 0.114 0.120 101 106 1 10.0-160 5.13 35 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477347-01 L1478343-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1478343-01 04/05/22 20:30 • (MS) R3777929-4 04/06/22 02:48 • (MSD) R3777929-5 04/06/22 03:08 Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
1,1,2-Trichlorotrifluoroethane 0.113 ND 0.0643 0.0759 56.9 67.2 1 10.0-160 16.5 36 Tetrachloroethene 0.113 ND 0.0711 0.0774 62.9 68.5 1 10.0-156 8.48 39 Toluene 0.113 ND 0.0779 0.0809 68.9 71.6 1 10.0-156 3.78 38 1,2,3-Trichlorobenzene 0.113 ND 0.0986 0.111 87.3 98.2 1 10.0-160 11.8 40 1,2,4-Trichlorobenzene 0.113 ND 0.105 0.115 92.9 102 1 10.0-160 9.09 40 1,1,1-Trichloroethane 0.113 ND 0.0817 0.0883 72.3 78.1 1 10.0-144 7.76 35 1,1,2-Trichloroethane 0.113 ND 0.105 0.105 92.9 92.9 1 10.0-160 0.000 35 Trichloroethene 0.113 ND 0.0788 0.0843 69.7 74.6 1 10.0-156 6.74 38 Trichlorofluoromethane 0.113 ND 0.0360 0.0413 31.9 36.5 1 10.0-160 13.7 40 1,2,3-Trichloropropane 0.113 ND 0.120 0.126 106 112 1 10.0-156 4.88 35 1,2,4-Trimethylbenzene 0.113 ND 0.0872 0.0853 77.2 75.5 1 10.0-160 2.20 36 1,2,3-Trimethylbenzene 0.113 ND 0.0957 0.0983 84.7 87.0 1 10.0-160 2.68 36 1,3,5-Trimethylbenzene 0.113 ND 0.0907 0.0907 80.3 80.3 1 10.0-160 0.000 38 Vinyl chloride 0.113 ND 0.0660 0.0763 58.4 67.5 1 10.0-160 14.5 37 Xylenes, Total 0.337 ND 0.242 0.249 71.8 73.9 1 10.0-160 2.85 38 (S) Toluene-d8 104 103 75.0-131
(S) 4-Bromofluorobenzene 97.8 96.9 67.0-138
(S) 1,2-Dichloroethane-d4 113 113 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 8015 L1477347-01 Method Blank (MB)
(MB) R3777960-1 04/05/22 21:03
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
C12-C22 Hydrocarbons U 0.733 4.00
C22-C32 Hydrocarbons U 1.33 4.00
C32-C40 Hydrocarbons U 1.33 4.00
(S) o-Terphenyl 90.7 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3777960-2 04/05/22 21:45
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 25.0 21.8 87.2 50.0-150
C22-C32 Hydrocarbons 25.0 20.1 80.4 50.0-150
(S) o-Terphenyl 73.4 18.0-148
L1476737-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1476737-03 04/05/22 22:02 • (MS) R3777960-3 04/05/22 22:19 • (MSD) R3777960-4 04/05/22 22:36 Spike Amount
(dry)
Original Result
(dry) MS Result (dry) MSD Result (dry) MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits Analyte mg/kg mg/kg mg/kg mg/kg % % % % %
C12-C22 Hydrocarbons 26.8 ND 24.4 24.9 90.9 95.4 1 50.0-150 2.24 20 C22-C32 Hydrocarbons 26.8 ND 23.4 23.2 87.2 88.6 1 50.0-150 0.948 20 (S) o-Terphenyl 68.8 72.8 18.0-148
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
(dry) Results are reported based on the dry weight of the sample. [this will only be present on a dry report basis for soils].

MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

RDL (dry) Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference (RPD) from a quality control sample. The Original Sample may not be included within the reported SDG.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
J The identification of the analyte is acceptable; the reported value is an estimate.

J4 The associated batch QC was outside the established quality control range for accuracy.

J5 The sample matrix interfered with the ability to make any accurate determination; spike value is high.

J6 The sample matrix interfered with the ability to make any accurate determination; spike value is low. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477347 04/08/22 08:14 7928 of 11211 21 of 23 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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ANALYTICAL REPORT
April 07, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1476743
Samples Received: 03/30/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 07, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Ds: Detection Summary 5
Sr: Sample Results 6
B-4-24-34 L1476743-01 6
B-3-24-34 L1476743-02 8
Qc: Quality Control Summary 10
Volatile Organic Compounds (GC) by Method 8015 10
Volatile Organic Compounds (GC/MS) by Method 8260B 11
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 16 Gl: Glossary of Terms 18
Al: Accreditations & Locations 19
Sc: Sample Chain of Custody 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-4-24-34 L1476743-01 GW G. Carr 03/29/22 10:20 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1841639 1 04/01/22 22:06 04/01/22 22:06 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842089 1 04/02/22 08:48 04/02/22 08:48 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1841340 1.29 04/03/22 09:49 04/04/22 06:19 DMG Mt. Juliet, TN Collected by Collected date/time Received date/time
B-3-24-34 L1476743-02 GW G. Carr 03/29/22 12:00 03/30/22 11:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1841639 1 04/01/22 22:28 04/01/22 22:28 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842089 1 04/02/22 09:08 04/02/22 09:08 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1844095 1 04/06/22 16:58 04/06/22 23:55 MWS Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Volatile Organic Compounds (GC/MS) by Method 8260B
The associated batch QC was above the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1842089 (LCS) R3777194-1, L1476743-01, 02 1,2,3-Trimethylbenzene The associated batch QC was below the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1842089 (LCS) R3777194-1, L1476743-01, 02 trans-1,4-Dichloro-2-butene 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Project Manager
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DETECTION SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l date / time
B-4-24-34 L1476743-01 Chloroform 1.84 0.500 1 04/02/2022 08:48 WG1842089 B-3-24-34 L1476743-02 Chloroform 3.31 0.500 1 04/02/2022 09:08 WG1842089 B-3-24-34 L1476743-02 cis-1,2-Dichloroethene 0.828 0.500 1 04/02/2022 09:08 WG1842089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l date / time
B-4-24-34 L1476743-01 C12-C22 Hydrocarbons 520 129 1.29 04/04/2022 06:19 WG1841340 B-4-24-34 L1476743-01 C22-C32 Hydrocarbons 873 129 1.29 04/04/2022 06:19 WG1841340 B-4-24-34 L1476743-01 C32-C40 Hydrocarbons 781 129 1.29 04/04/2022 06:19 WG1841340 B-3-24-34 L1476743-02 C12-C22 Hydrocarbons 147 100 1 04/06/2022 23:55 WG1844095 B-3-24-34 L1476743-02 C22-C32 Hydrocarbons 220 100 1 04/06/2022 23:55 WG1844095 B-3-24-34 L1476743-02 C32-C40 Hydrocarbons 236 100 1 04/06/2022 23:55 WG1844095 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1476743
B-4-24-34
Collected date/time: 03/29/22 10:20
Volatile Organic Compounds (GC) by Method 8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
TPHG C5 - C12 ND 100 1 04/01/2022 22:06 WG1841639
(S) a,a,a-Trifluorotoluene(FID) 96.5 78.0-120 04/01/2022 22:06 WG1841639 Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 25.0 1 04/02/2022 08:48 WG1842089
Acrylonitrile ND 5.00 1 04/02/2022 08:48 WG1842089
Benzene ND 0.500 1 04/02/2022 08:48 WG1842089
Bromobenzene ND 0.500 1 04/02/2022 08:48 WG1842089
Bromodichloromethane ND 0.500 1 04/02/2022 08:48 WG1842089 Bromochloromethane ND 0.500 1 04/02/2022 08:48 WG1842089 Bromoform ND 0.500 1 04/02/2022 08:48 WG1842089
Bromomethane ND 2.50 1 04/02/2022 08:48 WG1842089
n-Butylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089
sec-Butylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089
tert-Butylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089 Carbon disulfide ND 0.500 1 04/02/2022 08:48 WG1842089
Carbon tetrachloride ND 0.500 1 04/02/2022 08:48 WG1842089 Chlorobenzene ND 0.500 1 04/02/2022 08:48 WG1842089
Chlorodibromomethane ND 0.500 1 04/02/2022 08:48 WG1842089 Chloroethane ND 2.50 1 04/02/2022 08:48 WG1842089
Chloroform 1.84 0.500 1 04/02/2022 08:48 WG1842089
Chloromethane ND 1.25 1 04/02/2022 08:48 WG1842089
2-Chlorotoluene ND 0.500 1 04/02/2022 08:48 WG1842089
4-Chlorotoluene ND 0.500 1 04/02/2022 08:48 WG1842089
1,2-Dibromo-3-Chloropropane ND 2.50 1 04/02/2022 08:48 WG1842089 1,2-Dibromoethane ND 0.500 1 04/02/2022 08:48 WG1842089 Dibromomethane ND 0.500 1 04/02/2022 08:48 WG1842089
1,2-Dichlorobenzene ND 0.500 1 04/02/2022 08:48 WG1842089 1,3-Dichlorobenzene ND 0.500 1 04/02/2022 08:48 WG1842089 1,4-Dichlorobenzene ND 0.500 1 04/02/2022 08:48 WG1842089 Dichlorodifluoromethane ND 2.50 1 04/02/2022 08:48 WG1842089 1,1-Dichloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 1,2-Dichloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 1,1-Dichloroethene ND 0.500 1 04/02/2022 08:48 WG1842089 cis-1,2-Dichloroethene ND 0.500 1 04/02/2022 08:48 WG1842089 trans-1,2-Dichloroethene ND 0.500 1 04/02/2022 08:48 WG1842089 1,2-Dichloropropane ND 0.500 1 04/02/2022 08:48 WG1842089 1,1-Dichloropropene ND 0.500 1 04/02/2022 08:48 WG1842089 1,3-Dichloropropane ND 1.00 1 04/02/2022 08:48 WG1842089 cis-1,3-Dichloropropene ND 0.500 1 04/02/2022 08:48 WG1842089 trans-1,3-Dichloropropene ND 0.500 1 04/02/2022 08:48 WG1842089 trans-1,4-Dichloro-2-butene ND J4 5.00 1 04/02/2022 08:48 WG1842089 2,2-Dichloropropane ND 0.500 1 04/02/2022 08:48 WG1842089 Di-isopropyl ether ND 0.500 1 04/02/2022 08:48 WG1842089 Ethylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089
Hexachloro-1,3-butadiene ND 1.00 1 04/02/2022 08:48 WG1842089 2-Hexanone ND 5.00 1 04/02/2022 08:48 WG1842089
n-Hexane ND 5.00 1 04/02/2022 08:48 WG1842089
Iodomethane ND 5.00 1 04/02/2022 08:48 WG1842089
Isopropylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089
p-Isopropyltoluene ND 0.500 1 04/02/2022 08:48 WG1842089 2-Butanone (MEK) ND 5.00 1 04/02/2022 08:48 WG1842089
Methylene Chloride ND 2.50 1 04/02/2022 08:48 WG1842089 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1476743
B-4-24-34
Collected date/time: 03/29/22 10:20
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
4-Methyl-2-pentanone (MIBK) ND 5.00 1 04/02/2022 08:48 WG1842089 Methyl tert-butyl ether ND 0.500 1 04/02/2022 08:48 WG1842089 Naphthalene ND 2.50 1 04/02/2022 08:48 WG1842089
n-Propylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089
Styrene ND 0.500 1 04/02/2022 08:48 WG1842089
1,1,1,2-Tetrachloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 1,1,2,2-Tetrachloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 1,1,2-Trichlorotrifluoroethane ND 0.500 1 04/02/2022 08:48 WG1842089 Tetrachloroethene ND 0.500 1 04/02/2022 08:48 WG1842089 Toluene ND 0.500 1 04/02/2022 08:48 WG1842089
1,2,3-Trichlorobenzene ND 0.500 1 04/02/2022 08:48 WG1842089 1,2,4-Trichlorobenzene ND 1.00 1 04/02/2022 08:48 WG1842089 1,1,1-Trichloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 1,1,2-Trichloroethane ND 0.500 1 04/02/2022 08:48 WG1842089 Trichloroethene ND 0.500 1 04/02/2022 08:48 WG1842089
Trichlorofluoromethane ND 2.50 1 04/02/2022 08:48 WG1842089 1,2,3-Trichloropropane ND 2.50 1 04/02/2022 08:48 WG1842089 1,2,4-Trimethylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089 1,2,3-Trimethylbenzene ND J4 0.500 1 04/02/2022 08:48 WG1842089 1,3,5-Trimethylbenzene ND 0.500 1 04/02/2022 08:48 WG1842089 Vinyl acetate ND 5.00 1 04/02/2022 08:48 WG1842089
Vinyl chloride ND 0.500 1 04/02/2022 08:48 WG1842089
Xylenes, Total ND 1.50 1 04/02/2022 08:48 WG1842089
1,4-Dioxane ND 100 1 04/02/2022 08:48 WG1842089
(S) Toluene-d8 109 80.0-120 04/02/2022 08:48 WG1842089
(S) 4-Bromofluorobenzene 101 77.0-126 04/02/2022 08:48 WG1842089 (S) 1,2-Dichloroethane-d4 91.1 70.0-130 04/02/2022 08:48 WG1842089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
C12-C22 Hydrocarbons 520 129 1.29 04/04/2022 06:19 WG1841340 C22-C32 Hydrocarbons 873 129 1.29 04/04/2022 06:19 WG1841340 C32-C40 Hydrocarbons 781 129 1.29 04/04/2022 06:19 WG1841340 (S) o-Terphenyl 103 52.0-156 04/04/2022 06:19 WG1841340 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1476743
B-3-24-34
Collected date/time: 03/29/22 12:00
Volatile Organic Compounds (GC) by Method 8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
TPHG C5 - C12 ND 100 1 04/01/2022 22:28 WG1841639
(S) a,a,a-Trifluorotoluene(FID) 97.1 78.0-120 04/01/2022 22:28 WG1841639 Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 25.0 1 04/02/2022 09:08 WG1842089
Acrylonitrile ND 5.00 1 04/02/2022 09:08 WG1842089
Benzene ND 0.500 1 04/02/2022 09:08 WG1842089
Bromobenzene ND 0.500 1 04/02/2022 09:08 WG1842089
Bromodichloromethane ND 0.500 1 04/02/2022 09:08 WG1842089 Bromochloromethane ND 0.500 1 04/02/2022 09:08 WG1842089 Bromoform ND 0.500 1 04/02/2022 09:08 WG1842089
Bromomethane ND 2.50 1 04/02/2022 09:08 WG1842089
n-Butylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089
sec-Butylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089
tert-Butylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089 Carbon disulfide ND 0.500 1 04/02/2022 09:08 WG1842089
Carbon tetrachloride ND 0.500 1 04/02/2022 09:08 WG1842089 Chlorobenzene ND 0.500 1 04/02/2022 09:08 WG1842089
Chlorodibromomethane ND 0.500 1 04/02/2022 09:08 WG1842089 Chloroethane ND 2.50 1 04/02/2022 09:08 WG1842089
Chloroform 3.31 0.500 1 04/02/2022 09:08 WG1842089
Chloromethane ND 1.25 1 04/02/2022 09:08 WG1842089
2-Chlorotoluene ND 0.500 1 04/02/2022 09:08 WG1842089
4-Chlorotoluene ND 0.500 1 04/02/2022 09:08 WG1842089
1,2-Dibromo-3-Chloropropane ND 2.50 1 04/02/2022 09:08 WG1842089 1,2-Dibromoethane ND 0.500 1 04/02/2022 09:08 WG1842089 Dibromomethane ND 0.500 1 04/02/2022 09:08 WG1842089
1,2-Dichlorobenzene ND 0.500 1 04/02/2022 09:08 WG1842089 1,3-Dichlorobenzene ND 0.500 1 04/02/2022 09:08 WG1842089 1,4-Dichlorobenzene ND 0.500 1 04/02/2022 09:08 WG1842089 Dichlorodifluoromethane ND 2.50 1 04/02/2022 09:08 WG1842089 1,1-Dichloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 1,2-Dichloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 1,1-Dichloroethene ND 0.500 1 04/02/2022 09:08 WG1842089 cis-1,2-Dichloroethene 0.828 0.500 1 04/02/2022 09:08 WG1842089 trans-1,2-Dichloroethene ND 0.500 1 04/02/2022 09:08 WG1842089 1,2-Dichloropropane ND 0.500 1 04/02/2022 09:08 WG1842089 1,1-Dichloropropene ND 0.500 1 04/02/2022 09:08 WG1842089 1,3-Dichloropropane ND 1.00 1 04/02/2022 09:08 WG1842089 cis-1,3-Dichloropropene ND 0.500 1 04/02/2022 09:08 WG1842089 trans-1,3-Dichloropropene ND 0.500 1 04/02/2022 09:08 WG1842089 trans-1,4-Dichloro-2-butene ND J4 5.00 1 04/02/2022 09:08 WG1842089 2,2-Dichloropropane ND 0.500 1 04/02/2022 09:08 WG1842089 Di-isopropyl ether ND 0.500 1 04/02/2022 09:08 WG1842089 Ethylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089
Hexachloro-1,3-butadiene ND 1.00 1 04/02/2022 09:08 WG1842089 2-Hexanone ND 5.00 1 04/02/2022 09:08 WG1842089
n-Hexane ND 5.00 1 04/02/2022 09:08 WG1842089
Iodomethane ND 5.00 1 04/02/2022 09:08 WG1842089
Isopropylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089
p-Isopropyltoluene ND 0.500 1 04/02/2022 09:08 WG1842089 2-Butanone (MEK) ND 5.00 1 04/02/2022 09:08 WG1842089
Methylene Chloride ND 2.50 1 04/02/2022 09:08 WG1842089 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476743 04/07/22 12:22 7938 of 11211 8 of 20 SAMPLE RESULTS - 02
L1476743
B-3-24-34
Collected date/time: 03/29/22 12:00
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
4-Methyl-2-pentanone (MIBK) ND 5.00 1 04/02/2022 09:08 WG1842089 Methyl tert-butyl ether ND 0.500 1 04/02/2022 09:08 WG1842089 Naphthalene ND 2.50 1 04/02/2022 09:08 WG1842089
n-Propylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089
Styrene ND 0.500 1 04/02/2022 09:08 WG1842089
1,1,1,2-Tetrachloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 1,1,2,2-Tetrachloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 1,1,2-Trichlorotrifluoroethane ND 0.500 1 04/02/2022 09:08 WG1842089 Tetrachloroethene ND 0.500 1 04/02/2022 09:08 WG1842089 Toluene ND 0.500 1 04/02/2022 09:08 WG1842089
1,2,3-Trichlorobenzene ND 0.500 1 04/02/2022 09:08 WG1842089 1,2,4-Trichlorobenzene ND 1.00 1 04/02/2022 09:08 WG1842089 1,1,1-Trichloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 1,1,2-Trichloroethane ND 0.500 1 04/02/2022 09:08 WG1842089 Trichloroethene ND 0.500 1 04/02/2022 09:08 WG1842089
Trichlorofluoromethane ND 2.50 1 04/02/2022 09:08 WG1842089 1,2,3-Trichloropropane ND 2.50 1 04/02/2022 09:08 WG1842089 1,2,4-Trimethylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089 1,2,3-Trimethylbenzene ND J4 0.500 1 04/02/2022 09:08 WG1842089 1,3,5-Trimethylbenzene ND 0.500 1 04/02/2022 09:08 WG1842089 Vinyl acetate ND 5.00 1 04/02/2022 09:08 WG1842089
Vinyl chloride ND 0.500 1 04/02/2022 09:08 WG1842089
Xylenes, Total ND 1.50 1 04/02/2022 09:08 WG1842089
1,4-Dioxane ND 100 1 04/02/2022 09:08 WG1842089
(S) Toluene-d8 109 80.0-120 04/02/2022 09:08 WG1842089
(S) 4-Bromofluorobenzene 98.8 77.0-126 04/02/2022 09:08 WG1842089 (S) 1,2-Dichloroethane-d4 87.9 70.0-130 04/02/2022 09:08 WG1842089 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
C12-C22 Hydrocarbons 147 100 1 04/06/2022 23:55 WG1844095 C22-C32 Hydrocarbons 220 100 1 04/06/2022 23:55 WG1844095 C32-C40 Hydrocarbons 236 100 1 04/06/2022 23:55 WG1844095 (S) o-Terphenyl 103 52.0-156 04/06/2022 23:55 WG1844095 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC) by Method 8015 L1476743-01,02 Method Blank (MB)
(MB) R3776685-3 04/01/22 09:04
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
TPHG C5 - C12 51.8 J 30.4 100
(S)
a,a,a-Trifluorotoluene(FID) 96.9 78.0-120
Laboratory Control Sample (LCS)
(LCS) R3776685-2 04/01/22 08:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
TPHG C5 - C12 5500 5150 93.6 71.0-127
(S)
a,a,a-Trifluorotoluene(FID) 102 78.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476743-01,02 Method Blank (MB)
(MB) R3777194-3 04/02/22 06:03
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 25.0
Acrylonitrile U 0.671 5.00
Benzene U 0.0941 0.500
Bromobenzene U 0.118 0.500
Bromodichloromethane U 0.136 0.500
Bromochloromethane U 0.128 0.500
Bromoform U 0.129 0.500
Bromomethane U 0.605 2.50
n-Butylbenzene U 0.157 0.500
sec-Butylbenzene U 0.125 0.500
tert-Butylbenzene U 0.127 0.500
Carbon disulfide U 0.0962 0.500
Carbon tetrachloride U 0.128 0.500
Chlorobenzene U 0.117 0.500
Chlorodibromomethane U 0.140 0.500
Chloroethane U 0.192 2.50
Chloroform U 0.111 0.500
Chloromethane U 0.960 1.25
2-Chlorotoluene U 0.106 0.500
4-Chlorotoluene U 0.114 0.500
1,2-Dibromo-3-Chloropropane U 0.276 2.50
1,2-Dibromoethane U 0.126 0.500
Dibromomethane U 0.122 0.500
1,2-Dichlorobenzene U 0.107 0.500
1,3-Dichlorobenzene U 0.299 0.500
1,4-Dichlorobenzene U 0.120 0.500
Dichlorodifluoromethane U 0.374 2.50
1,1-Dichloroethane U 0.100 0.500
1,2-Dichloroethane U 0.0819 0.500
1,1-Dichloroethene U 0.188 0.500
cis-1,2-Dichloroethene U 0.126 0.500
trans-1,2-Dichloroethene U 0.149 0.500
1,2-Dichloropropane U 0.149 0.500
1,1-Dichloropropene U 0.142 0.500
1,3-Dichloropropane U 0.109 1.00
cis-1,3-Dichloropropene U 0.111 0.500
trans-1,3-Dichloropropene U 0.118 0.500
trans-1,4-Dichloro-2-butene U 0.467 5.00
2,2-Dichloropropane U 0.161 0.500
Di-isopropyl ether U 0.105 0.500
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476743-01,02 Method Blank (MB)
(MB) R3777194-3 04/02/22 06:03
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Ethylbenzene U 0.137 0.500
Hexachloro-1,3-butadiene U 0.337 1.00
2-Hexanone U 0.787 5.00
n-Hexane U 0.749 5.00
Iodomethane U 0.554 5.00
Isopropylbenzene U 0.105 0.500
p-Isopropyltoluene U 0.120 0.500
2-Butanone (MEK) U 1.19 5.00
Methylene Chloride U 0.430 2.50
4-Methyl-2-pentanone (MIBK) U 0.478 5.00
Methyl tert-butyl ether U 0.101 0.500
Naphthalene U 0.174 2.50
n-Propylbenzene U 0.0993 0.500
Styrene U 0.118 0.500
1,1,1,2-Tetrachloroethane U 0.147 0.500
1,1,2,2-Tetrachloroethane U 0.133 0.500
1,1,2-Trichlorotrifluoroethane U 0.180 0.500
Tetrachloroethene U 0.300 0.500
Toluene U 0.278 0.500
1,2,3-Trichlorobenzene U 0.164 0.500
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 0.500
1,1,2-Trichloroethane U 0.158 0.500
Trichloroethene U 0.190 0.500
Trichlorofluoromethane U 0.160 2.50
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 0.500
1,2,3-Trimethylbenzene U 0.104 0.500
1,3,5-Trimethylbenzene U 0.104 0.500
Vinyl acetate U 0.692 5.00
Vinyl chloride U 0.234 0.500
Xylenes, Total U 0.174 1.50
1,4-Dioxane U 2.83 100
(S) Toluene-d8 109 80.0-120
(S) 4-Bromofluorobenzene 98.3 77.0-126
(S) 1,2-Dichloroethane-d4 88.9 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476743-01,02 Laboratory Control Sample (LCS)
(LCS) R3777194-1 04/02/22 04:41
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Acetone 25.0 20.3 81.2 19.0-160
Acrylonitrile 25.0 24.5 98.0 55.0-149
Benzene 5.00 4.94 98.8 70.0-123
Bromobenzene 5.00 5.13 103 73.0-121
Bromodichloromethane 5.00 4.27 85.4 75.0-120
Bromochloromethane 5.00 5.09 102 76.0-122
Bromoform 5.00 3.81 76.2 68.0-132
Bromomethane 5.00 5.54 111 10.0-160
n-Butylbenzene 5.00 4.87 97.4 73.0-125
sec-Butylbenzene 5.00 5.33 107 75.0-125
tert-Butylbenzene 5.00 5.25 105 76.0-124
Carbon disulfide 5.00 5.37 107 61.0-128
Carbon tetrachloride 5.00 5.09 102 68.0-126
Chlorobenzene 5.00 5.31 106 80.0-121
Chlorodibromomethane 5.00 4.40 88.0 77.0-125
Chloroethane 5.00 5.71 114 47.0-150
Chloroform 5.00 5.09 102 73.0-120
Chloromethane 5.00 4.31 86.2 41.0-142
2-Chlorotoluene 5.00 5.57 111 76.0-123
4-Chlorotoluene 5.00 5.20 104 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 3.79 75.8 58.0-134
1,2-Dibromoethane 5.00 4.95 99.0 80.0-122
Dibromomethane 5.00 4.80 96.0 80.0-120
1,2-Dichlorobenzene 5.00 4.91 98.2 79.0-121
1,3-Dichlorobenzene 5.00 5.07 101 79.0-120
1,4-Dichlorobenzene 5.00 4.99 99.8 79.0-120
Dichlorodifluoromethane 5.00 5.39 108 51.0-149
1,1-Dichloroethane 5.00 4.89 97.8 70.0-126
1,2-Dichloroethane 5.00 4.71 94.2 70.0-128
1,1-Dichloroethene 5.00 5.41 108 71.0-124
cis-1,2-Dichloroethene 5.00 4.94 98.8 73.0-120
trans-1,2-Dichloroethene 5.00 5.37 107 73.0-120
1,2-Dichloropropane 5.00 5.20 104 77.0-125
1,1-Dichloropropene 5.00 5.23 105 74.0-126
1,3-Dichloropropane 5.00 5.15 103 80.0-120
cis-1,3-Dichloropropene 5.00 4.33 86.6 80.0-123
trans-1,3-Dichloropropene 5.00 4.26 85.2 78.0-124
trans-1,4-Dichloro-2-butene 5.00 1.20 24.0 33.0-144 J4
2,2-Dichloropropane 5.00 4.63 92.6 58.0-130
Di-isopropyl ether 5.00 4.49 89.8 58.0-138
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476743-01,02 Laboratory Control Sample (LCS)
(LCS) R3777194-1 04/02/22 04:41
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Ethylbenzene 5.00 5.09 102 79.0-123
Hexachloro-1,3-butadiene 5.00 4.15 83.0 54.0-138
2-Hexanone 25.0 24.8 99.2 67.0-149
n-Hexane 5.00 5.52 110 57.0-133
Iodomethane 25.0 25.3 101 33.0-147
Isopropylbenzene 5.00 4.95 99.0 76.0-127
p-Isopropyltoluene 5.00 5.00 100 76.0-125
2-Butanone (MEK) 25.0 22.0 88.0 44.0-160
Methylene Chloride 5.00 5.14 103 67.0-120
4-Methyl-2-pentanone (MIBK) 25.0 23.6 94.4 68.0-142
Methyl tert-butyl ether 5.00 5.05 101 68.0-125
Naphthalene 5.00 4.53 90.6 54.0-135
n-Propylbenzene 5.00 5.25 105 77.0-124
Styrene 5.00 4.18 83.6 73.0-130
1,1,1,2-Tetrachloroethane 5.00 4.79 95.8 75.0-125
1,1,2,2-Tetrachloroethane 5.00 5.13 103 65.0-130
1,1,2-Trichlorotrifluoroethane 5.00 5.72 114 69.0-132
Tetrachloroethene 5.00 4.94 98.8 72.0-132
Toluene 5.00 5.20 104 79.0-120
1,2,3-Trichlorobenzene 5.00 4.51 90.2 50.0-138
1,2,4-Trichlorobenzene 5.00 4.42 88.4 57.0-137
1,1,1-Trichloroethane 5.00 5.04 101 73.0-124
1,1,2-Trichloroethane 5.00 5.04 101 80.0-120
Trichloroethene 5.00 5.13 103 78.0-124
Trichlorofluoromethane 5.00 5.21 104 59.0-147
1,2,3-Trichloropropane 5.00 5.72 114 73.0-130
1,2,4-Trimethylbenzene 5.00 5.25 105 76.0-121
1,2,3-Trimethylbenzene 5.00 6.47 129 77.0-120 J4
1,3,5-Trimethylbenzene 5.00 5.30 106 76.0-122
Vinyl acetate 25.0 14.3 57.2 11.0-160
Vinyl chloride 5.00 4.94 98.8 67.0-131
Xylenes, Total 15.0 15.3 102 79.0-123
(S) Toluene-d8 109 80.0-120
(S) 4-Bromofluorobenzene 99.8 77.0-126
(S) 1,2-Dichloroethane-d4 89.5 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1476743-01,02 Laboratory Control Sample (LCS)
(LCS) R3777194-2 04/02/22 05:22
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
1,4-Dioxane 1000 743 74.3 13.0-160
(S) Toluene-d8 106 80.0-120
(S) 4-Bromofluorobenzene 102 77.0-126
(S) 1,2-Dichloroethane-d4 86.7 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1476743-01 Method Blank (MB)
(MB) R3777191-1 04/03/22 22:23
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
C12-C22 Hydrocarbons U 33.0 100
C22-C32 Hydrocarbons U 33.0 100
C32-C40 Hydrocarbons U 33.0 100
(S) o-Terphenyl 52.5 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3777191-2 04/03/22 22:43 • (LCSD) R3777191-3 04/03/22 23:03 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l % % % % %
C12-C22 Hydrocarbons 750 744 733 99.2 97.7 50.0-150 1.49 20 C22-C32 Hydrocarbons 750 739 734 98.5 97.9 50.0-150 0.679 20 (S) o-Terphenyl 101 100 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1476743-02 Method Blank (MB)
(MB) R3778359-1 04/06/22 21:14
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
C12-C22 Hydrocarbons U 33.0 100
C22-C32 Hydrocarbons U 33.0 100
C32-C40 Hydrocarbons U 33.0 100
(S) o-Terphenyl 66.0 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3778359-2 04/06/22 21:34 • (LCSD) R3778359-3 04/06/22 21:54 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l % % % % %
C12-C22 Hydrocarbons 750 684 693 91.2 92.4 50.0-150 1.31 20 C22-C32 Hydrocarbons 750 698 704 93.1 93.9 50.0-150 0.856 20 (S) o-Terphenyl 85.0 88.5 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
J The identification of the analyte is acceptable; the reported value is an estimate.

J4 The associated batch QC was outside the established quality control range for accuracy. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1476743 04/07/22 12:22 7948 of 11211 18 of 20 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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ANALYTICAL REPORT
April 07, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1477353
Samples Received: 03/31/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 07, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Ds: Detection Summary 5
Sr: Sample Results 6
B-2-24'-34' L1477353-01 6
B-1-24'-34' L1477353-02 8
Qc: Quality Control Summary 10
Volatile Organic Compounds (GC) by Method 8015 10
Volatile Organic Compounds (GC/MS) by Method 8260B 11
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 15 Gl: Glossary of Terms 16
Al: Accreditations & Locations 17
Sc: Sample Chain of Custody 18
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
B-2-24'-34' L1477353-01 GW G. Carr 03/29/22 14:55 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1841979 1 04/02/22 05:31 04/02/22 05:31 JAH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842539 1 04/03/22 20:39 04/03/22 20:39 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1844095 1 04/06/22 16:58 04/07/22 00:36 MWS Mt. Juliet, TN Collected by Collected date/time Received date/time
B-1-24'-34' L1477353-02 GW G. Carr 03/30/22 09:30 03/31/22 08:15 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1841979 1 04/02/22 05:52 04/02/22 05:52 JAH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1842539 2 04/03/22 21:00 04/03/22 21:00 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1844095 1 04/06/22 16:58 04/07/22 10:29 MWS Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
Sample Delivery Group (SDG) Narrative
pH outside of method requirement.

Batch Method Lab Sample ID
WG1844095 3511/8015 L1477353-01
Volatile Organic Compounds (GC/MS) by Method 8260B
The associated batch QC was above the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1842539 (LCS) R3777594-1, L1477353-01, 02 1,2,3-Trimethylbenzene The associated batch QC was below the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1842539 (LCS) R3777594-1, L1477353-01, 02 cis-1,3-Dichloropropene and trans-1,4-Dichloro-2-butene Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Surrogate recovery limits have been exceeded; values are outside lower control limits.

Batch Analyte Lab Sample ID
WG1844095 o-Terphenyl L1477353-02
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Project Manager
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DETECTION SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l date / time
B-2-24'-34' L1477353-01 Chloroform 3.43 0.500 1 04/03/2022 20:39 WG1842539 B-2-24'-34' L1477353-01 cis-1,2-Dichloroethene 1.07 0.500 1 04/03/2022 20:39 WG1842539 B-2-24'-34' L1477353-01 Tetrachloroethene 4.57 0.500 1 04/03/2022 20:39 WG1842539 B-1-24'-34' L1477353-02 Chloroform 4.15 1.00 2 04/03/2022 21:00 WG1842539 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Client ID Lab Sample ID Analyte ug/l ug/l date / time
B-2-24'-34' L1477353-01 C12-C22 Hydrocarbons 209 100 1 04/07/2022 00:36 WG1844095 B-2-24'-34' L1477353-01 C22-C32 Hydrocarbons 246 100 1 04/07/2022 00:36 WG1844095 B-2-24'-34' L1477353-01 C32-C40 Hydrocarbons 229 100 1 04/07/2022 00:36 WG1844095 B-1-24'-34' L1477353-02 C22-C32 Hydrocarbons 146 100 1 04/07/2022 10:29 WG1844095 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477353
B-2-24'-34'
Collected date/time: 03/29/22 14:55
Volatile Organic Compounds (GC) by Method 8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
TPHG C5 - C12 ND 100 1 04/02/2022 05:31 WG1841979
(S) a,a,a-Trifluorotoluene(FID) 97.9 78.0-120 04/02/2022 05:31 WG1841979 Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 25.0 1 04/03/2022 20:39 WG1842539
Acrylonitrile ND 5.00 1 04/03/2022 20:39 WG1842539
Benzene ND 0.500 1 04/03/2022 20:39 WG1842539
Bromobenzene ND 0.500 1 04/03/2022 20:39 WG1842539
Bromodichloromethane ND 0.500 1 04/03/2022 20:39 WG1842539 Bromochloromethane ND 0.500 1 04/03/2022 20:39 WG1842539 Bromoform ND 0.500 1 04/03/2022 20:39 WG1842539
Bromomethane ND 2.50 1 04/03/2022 20:39 WG1842539
n-Butylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539
sec-Butylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539
tert-Butylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539 Carbon disulfide ND 0.500 1 04/03/2022 20:39 WG1842539
Carbon tetrachloride ND 0.500 1 04/03/2022 20:39 WG1842539 Chlorobenzene ND 0.500 1 04/03/2022 20:39 WG1842539
Chlorodibromomethane ND 0.500 1 04/03/2022 20:39 WG1842539 Chloroethane ND 2.50 1 04/03/2022 20:39 WG1842539
Chloroform 3.43 0.500 1 04/03/2022 20:39 WG1842539
Chloromethane ND 1.25 1 04/03/2022 20:39 WG1842539
2-Chlorotoluene ND 0.500 1 04/03/2022 20:39 WG1842539
4-Chlorotoluene ND 0.500 1 04/03/2022 20:39 WG1842539
1,2-Dibromo-3-Chloropropane ND 2.50 1 04/03/2022 20:39 WG1842539 1,2-Dibromoethane ND 0.500 1 04/03/2022 20:39 WG1842539 Dibromomethane ND 0.500 1 04/03/2022 20:39 WG1842539
1,2-Dichlorobenzene ND 0.500 1 04/03/2022 20:39 WG1842539 1,3-Dichlorobenzene ND 0.500 1 04/03/2022 20:39 WG1842539 1,4-Dichlorobenzene ND 0.500 1 04/03/2022 20:39 WG1842539 Dichlorodifluoromethane ND 2.50 1 04/03/2022 20:39 WG1842539 1,1-Dichloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 1,2-Dichloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 1,1-Dichloroethene ND 0.500 1 04/03/2022 20:39 WG1842539 cis-1,2-Dichloroethene 1.07 0.500 1 04/03/2022 20:39 WG1842539 trans-1,2-Dichloroethene ND 0.500 1 04/03/2022 20:39 WG1842539 1,2-Dichloropropane ND 0.500 1 04/03/2022 20:39 WG1842539 1,1-Dichloropropene ND 0.500 1 04/03/2022 20:39 WG1842539 1,3-Dichloropropane ND 1.00 1 04/03/2022 20:39 WG1842539 cis-1,3-Dichloropropene ND J4 0.500 1 04/03/2022 20:39 WG1842539 trans-1,3-Dichloropropene ND 0.500 1 04/03/2022 20:39 WG1842539 trans-1,4-Dichloro-2-butene ND J4 5.00 1 04/03/2022 20:39 WG1842539 2,2-Dichloropropane ND 0.500 1 04/03/2022 20:39 WG1842539 Di-isopropyl ether ND 0.500 1 04/03/2022 20:39 WG1842539 Ethylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539
Hexachloro-1,3-butadiene ND 1.00 1 04/03/2022 20:39 WG1842539 2-Hexanone ND 5.00 1 04/03/2022 20:39 WG1842539
n-Hexane ND 5.00 1 04/03/2022 20:39 WG1842539
Iodomethane ND 5.00 1 04/03/2022 20:39 WG1842539
Isopropylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539
p-Isopropyltoluene ND 0.500 1 04/03/2022 20:39 WG1842539 2-Butanone (MEK) ND 5.00 1 04/03/2022 20:39 WG1842539
Methylene Chloride ND 2.50 1 04/03/2022 20:39 WG1842539 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477353
B-2-24'-34'
Collected date/time: 03/29/22 14:55
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
4-Methyl-2-pentanone (MIBK) ND 5.00 1 04/03/2022 20:39 WG1842539 Methyl tert-butyl ether ND 0.500 1 04/03/2022 20:39 WG1842539 Naphthalene ND 2.50 1 04/03/2022 20:39 WG1842539
n-Propylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539
Styrene ND 0.500 1 04/03/2022 20:39 WG1842539
1,1,1,2-Tetrachloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 1,1,2,2-Tetrachloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 1,1,2-Trichlorotrifluoroethane ND 0.500 1 04/03/2022 20:39 WG1842539 Tetrachloroethene 4.57 0.500 1 04/03/2022 20:39 WG1842539 Toluene ND 0.500 1 04/03/2022 20:39 WG1842539
1,2,3-Trichlorobenzene ND 0.500 1 04/03/2022 20:39 WG1842539 1,2,4-Trichlorobenzene ND 1.00 1 04/03/2022 20:39 WG1842539 1,1,1-Trichloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 1,1,2-Trichloroethane ND 0.500 1 04/03/2022 20:39 WG1842539 Trichloroethene ND 0.500 1 04/03/2022 20:39 WG1842539
Trichlorofluoromethane ND 2.50 1 04/03/2022 20:39 WG1842539 1,2,3-Trichloropropane ND 2.50 1 04/03/2022 20:39 WG1842539 1,2,4-Trimethylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539 1,2,3-Trimethylbenzene ND J4 0.500 1 04/03/2022 20:39 WG1842539 1,3,5-Trimethylbenzene ND 0.500 1 04/03/2022 20:39 WG1842539 Vinyl acetate ND 5.00 1 04/03/2022 20:39 WG1842539
Vinyl chloride ND 0.500 1 04/03/2022 20:39 WG1842539
Xylenes, Total ND 1.50 1 04/03/2022 20:39 WG1842539
1,4-Dioxane ND 100 1 04/03/2022 20:39 WG1842539
(S) Toluene-d8 111 80.0-120 04/03/2022 20:39 WG1842539
(S) 4-Bromofluorobenzene 91.6 77.0-126 04/03/2022 20:39 WG1842539 (S) 1,2-Dichloroethane-d4 88.5 70.0-130 04/03/2022 20:39 WG1842539 Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
C12-C22 Hydrocarbons 209 100 1 04/07/2022 00:36 WG1844095 C22-C32 Hydrocarbons 246 100 1 04/07/2022 00:36 WG1844095 C32-C40 Hydrocarbons 229 100 1 04/07/2022 00:36 WG1844095 (S) o-Terphenyl 114 52.0-156 04/07/2022 00:36 WG1844095 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1477353
B-1-24'-34'
Collected date/time: 03/30/22 09:30
Volatile Organic Compounds (GC) by Method 8015
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
TPHG C5 - C12 ND 100 1 04/02/2022 05:52 WG1841979
(S) a,a,a-Trifluorotoluene(FID) 95.8 78.0-120 04/02/2022 05:52 WG1841979 Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
Acetone ND 50.0 2 04/03/2022 21:00 WG1842539
Acrylonitrile ND 10.0 2 04/03/2022 21:00 WG1842539
Benzene ND 1.00 2 04/03/2022 21:00 WG1842539
Bromobenzene ND 1.00 2 04/03/2022 21:00 WG1842539
Bromodichloromethane ND 1.00 2 04/03/2022 21:00 WG1842539 Bromochloromethane ND 1.00 2 04/03/2022 21:00 WG1842539 Bromoform ND 1.00 2 04/03/2022 21:00 WG1842539
Bromomethane ND 5.00 2 04/03/2022 21:00 WG1842539
n-Butylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
sec-Butylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
tert-Butylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
Carbon disulfide ND 1.00 2 04/03/2022 21:00 WG1842539
Carbon tetrachloride ND 1.00 2 04/03/2022 21:00 WG1842539 Chlorobenzene ND 1.00 2 04/03/2022 21:00 WG1842539
Chlorodibromomethane ND 1.00 2 04/03/2022 21:00 WG1842539 Chloroethane ND 5.00 2 04/03/2022 21:00 WG1842539
Chloroform 4.15 1.00 2 04/03/2022 21:00 WG1842539
Chloromethane ND 2.50 2 04/03/2022 21:00 WG1842539
2-Chlorotoluene ND 1.00 2 04/03/2022 21:00 WG1842539
4-Chlorotoluene ND 1.00 2 04/03/2022 21:00 WG1842539
1,2-Dibromo-3-Chloropropane ND 5.00 2 04/03/2022 21:00 WG1842539 1,2-Dibromoethane ND 1.00 2 04/03/2022 21:00 WG1842539
Dibromomethane ND 1.00 2 04/03/2022 21:00 WG1842539
1,2-Dichlorobenzene ND 1.00 2 04/03/2022 21:00 WG1842539 1,3-Dichlorobenzene ND 1.00 2 04/03/2022 21:00 WG1842539 1,4-Dichlorobenzene ND 1.00 2 04/03/2022 21:00 WG1842539 Dichlorodifluoromethane ND 5.00 2 04/03/2022 21:00 WG1842539 1,1-Dichloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 1,2-Dichloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 1,1-Dichloroethene ND 1.00 2 04/03/2022 21:00 WG1842539 cis-1,2-Dichloroethene ND 1.00 2 04/03/2022 21:00 WG1842539 trans-1,2-Dichloroethene ND 1.00 2 04/03/2022 21:00 WG1842539 1,2-Dichloropropane ND 1.00 2 04/03/2022 21:00 WG1842539 1,1-Dichloropropene ND 1.00 2 04/03/2022 21:00 WG1842539 1,3-Dichloropropane ND 2.00 2 04/03/2022 21:00 WG1842539 cis-1,3-Dichloropropene ND J4 1.00 2 04/03/2022 21:00 WG1842539 trans-1,3-Dichloropropene ND 1.00 2 04/03/2022 21:00 WG1842539 trans-1,4-Dichloro-2-butene ND J4 10.0 2 04/03/2022 21:00 WG1842539 2,2-Dichloropropane ND 1.00 2 04/03/2022 21:00 WG1842539 Di-isopropyl ether ND 1.00 2 04/03/2022 21:00 WG1842539 Ethylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
Hexachloro-1,3-butadiene ND 2.00 2 04/03/2022 21:00 WG1842539 2-Hexanone ND 10.0 2 04/03/2022 21:00 WG1842539
n-Hexane ND 10.0 2 04/03/2022 21:00 WG1842539
Iodomethane ND 10.0 2 04/03/2022 21:00 WG1842539
Isopropylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
p-Isopropyltoluene ND 1.00 2 04/03/2022 21:00 WG1842539 2-Butanone (MEK) ND 10.0 2 04/03/2022 21:00 WG1842539
Methylene Chloride ND 5.00 2 04/03/2022 21:00 WG1842539 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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L1477353
B-1-24'-34'
Collected date/time: 03/30/22 09:30
Volatile Organic Compounds (GC/MS) by Method 8260B
Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
4-Methyl-2-pentanone (MIBK) ND 10.0 2 04/03/2022 21:00 WG1842539 Methyl tert-butyl ether ND 1.00 2 04/03/2022 21:00 WG1842539 Naphthalene ND 5.00 2 04/03/2022 21:00 WG1842539
n-Propylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539
Styrene ND 1.00 2 04/03/2022 21:00 WG1842539
1,1,1,2-Tetrachloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 1,1,2,2-Tetrachloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 1,1,2-Trichlorotrifluoroethane ND 1.00 2 04/03/2022 21:00 WG1842539 Tetrachloroethene ND 1.00 2 04/03/2022 21:00 WG1842539
Toluene ND 1.00 2 04/03/2022 21:00 WG1842539
1,2,3-Trichlorobenzene ND 1.00 2 04/03/2022 21:00 WG1842539 1,2,4-Trichlorobenzene ND 2.00 2 04/03/2022 21:00 WG1842539 1,1,1-Trichloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 1,1,2-Trichloroethane ND 1.00 2 04/03/2022 21:00 WG1842539 Trichloroethene ND 1.00 2 04/03/2022 21:00 WG1842539
Trichlorofluoromethane ND 5.00 2 04/03/2022 21:00 WG1842539 1,2,3-Trichloropropane ND 5.00 2 04/03/2022 21:00 WG1842539 1,2,4-Trimethylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539 1,2,3-Trimethylbenzene ND J4 1.00 2 04/03/2022 21:00 WG1842539 1,3,5-Trimethylbenzene ND 1.00 2 04/03/2022 21:00 WG1842539 Vinyl acetate ND 10.0 2 04/03/2022 21:00 WG1842539
Vinyl chloride ND 1.00 2 04/03/2022 21:00 WG1842539
Xylenes, Total ND 3.00 2 04/03/2022 21:00 WG1842539
1,4-Dioxane ND 200 2 04/03/2022 21:00 WG1842539
(S) Toluene-d8 113 80.0-120 04/03/2022 21:00 WG1842539
(S) 4-Bromofluorobenzene 94.3 77.0-126 04/03/2022 21:00 WG1842539 (S) 1,2-Dichloroethane-d4 89.5 70.0-130 04/03/2022 21:00 WG1842539 Sample Narrative:

L1477353-02 WG1842539: Lowest possible dilution due to sediment in sample vial.

Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Result Qualifier RDL Dilution Analysis Batch
Analyte ug/l ug/l date / time
C12-C22 Hydrocarbons ND 100 1 04/07/2022 10:29 WG1844095 C22-C32 Hydrocarbons 146 100 1 04/07/2022 10:29 WG1844095 C32-C40 Hydrocarbons ND 100 1 04/07/2022 10:29 WG1844095 (S) o-Terphenyl 2.47 J2 52.0-156 04/07/2022 10:29 WG1844095 Sample Narrative:

L1477353-02 WG1844095: Duplicate Analysis performed due to surrogate failure. Results confirm; reporting in hold data 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC) by Method 8015 L1477353-01,02 Method Blank (MB)
(MB) R3777061-2 04/02/22 00:46
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
TPHG C5 - C12 U 30.4 100
(S)
a,a,a-Trifluorotoluene(FID) 97.8 78.0-120
Laboratory Control Sample (LCS)
(LCS) R3777061-1 04/01/22 23:38
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
TPHG C5 - C12 5500 5120 93.1 71.0-127
(S)
a,a,a-Trifluorotoluene(FID) 113 78.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477353-01,02 Method Blank (MB)
(MB) R3777594-3 04/03/22 15:23
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Acetone U 11.3 25.0
Acrylonitrile U 0.671 5.00
Benzene U 0.0941 0.500
Bromobenzene U 0.118 0.500
Bromodichloromethane U 0.136 0.500
Bromochloromethane U 0.128 0.500
Bromoform U 0.129 0.500
Bromomethane U 0.605 2.50
n-Butylbenzene U 0.157 0.500
sec-Butylbenzene U 0.125 0.500
tert-Butylbenzene U 0.127 0.500
Carbon disulfide U 0.0962 0.500
Carbon tetrachloride U 0.128 0.500
Chlorobenzene U 0.117 0.500
Chlorodibromomethane U 0.140 0.500
Chloroethane U 0.192 2.50
Chloroform U 0.111 0.500
Chloromethane U 0.960 1.25
2-Chlorotoluene U 0.106 0.500
4-Chlorotoluene U 0.114 0.500
1,2-Dibromo-3-Chloropropane U 0.276 2.50
1,2-Dibromoethane U 0.126 0.500
Dibromomethane U 0.122 0.500
1,2-Dichlorobenzene U 0.107 0.500
1,3-Dichlorobenzene U 0.299 0.500
1,4-Dichlorobenzene U 0.120 0.500
Dichlorodifluoromethane U 0.374 2.50
1,1-Dichloroethane U 0.100 0.500
1,2-Dichloroethane U 0.0819 0.500
1,1-Dichloroethene U 0.188 0.500
cis-1,2-Dichloroethene U 0.126 0.500
trans-1,2-Dichloroethene U 0.149 0.500
1,2-Dichloropropane U 0.149 0.500
1,1-Dichloropropene U 0.142 0.500
1,3-Dichloropropane U 0.109 1.00
cis-1,3-Dichloropropene U 0.111 0.500
trans-1,3-Dichloropropene U 0.118 0.500
trans-1,4-Dichloro-2-butene U 0.467 5.00
2,2-Dichloropropane U 0.161 0.500
Di-isopropyl ether U 0.105 0.500
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477353-01,02 Method Blank (MB)
(MB) R3777594-3 04/03/22 15:23
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Ethylbenzene U 0.137 0.500
Hexachloro-1,3-butadiene U 0.337 1.00
2-Hexanone U 0.787 5.00
n-Hexane U 0.749 5.00
Iodomethane U 0.554 5.00
Isopropylbenzene U 0.105 0.500
p-Isopropyltoluene U 0.120 0.500
2-Butanone (MEK) U 1.19 5.00
Methylene Chloride U 0.430 2.50
4-Methyl-2-pentanone (MIBK) U 0.478 5.00
Methyl tert-butyl ether U 0.101 0.500
Naphthalene U 0.174 2.50
n-Propylbenzene U 0.0993 0.500
Styrene U 0.118 0.500
1,1,1,2-Tetrachloroethane U 0.147 0.500
1,1,2,2-Tetrachloroethane U 0.133 0.500
1,1,2-Trichlorotrifluoroethane U 0.180 0.500
Tetrachloroethene U 0.300 0.500
Toluene U 0.278 0.500
1,2,3-Trichlorobenzene U 0.164 0.500
1,2,4-Trichlorobenzene U 0.481 1.00
1,1,1-Trichloroethane U 0.149 0.500
1,1,2-Trichloroethane U 0.158 0.500
Trichloroethene U 0.190 0.500
Trichlorofluoromethane U 0.160 2.50
1,2,3-Trichloropropane U 0.237 2.50
1,2,4-Trimethylbenzene U 0.322 0.500
1,2,3-Trimethylbenzene U 0.104 0.500
1,3,5-Trimethylbenzene U 0.104 0.500
Vinyl acetate U 0.692 5.00
Vinyl chloride U 0.234 0.500
Xylenes, Total U 0.174 1.50
1,4-Dioxane U 2.83 100
(S) Toluene-d8 112 80.0-120
(S) 4-Bromofluorobenzene 97.9 77.0-126
(S) 1,2-Dichloroethane-d4 88.3 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477353-01,02 Laboratory Control Sample (LCS)
(LCS) R3777594-1 04/03/22 13:57
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Acetone 25.0 26.5 106 19.0-160
Acrylonitrile 25.0 23.5 94.0 55.0-149
Benzene 5.00 4.60 92.0 70.0-123
Bromobenzene 5.00 4.78 95.6 73.0-121
Bromodichloromethane 5.00 3.98 79.6 75.0-120
Bromochloromethane 5.00 4.76 95.2 76.0-122
Bromoform 5.00 3.52 70.4 68.0-132
Bromomethane 5.00 4.26 85.2 10.0-160
n-Butylbenzene 5.00 4.69 93.8 73.0-125
sec-Butylbenzene 5.00 4.83 96.6 75.0-125
tert-Butylbenzene 5.00 4.77 95.4 76.0-124
Carbon disulfide 5.00 4.45 89.0 61.0-128
Carbon tetrachloride 5.00 4.42 88.4 68.0-126
Chlorobenzene 5.00 5.06 101 80.0-121
Chlorodibromomethane 5.00 4.16 83.2 77.0-125
Chloroethane 5.00 5.15 103 47.0-150
Chloroform 5.00 4.65 93.0 73.0-120
Chloromethane 5.00 3.66 73.2 41.0-142
2-Chlorotoluene 5.00 5.15 103 76.0-123
4-Chlorotoluene 5.00 4.78 95.6 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 3.80 76.0 58.0-134
1,2-Dibromoethane 5.00 4.73 94.6 80.0-122
Dibromomethane 5.00 4.61 92.2 80.0-120
1,2-Dichlorobenzene 5.00 4.95 99.0 79.0-121
1,3-Dichlorobenzene 5.00 4.63 92.6 79.0-120
1,4-Dichlorobenzene 5.00 4.81 96.2 79.0-120
Dichlorodifluoromethane 5.00 4.81 96.2 51.0-149
1,1-Dichloroethane 5.00 4.36 87.2 70.0-126
1,2-Dichloroethane 5.00 4.57 91.4 70.0-128
1,1-Dichloroethene 5.00 4.92 98.4 71.0-124
cis-1,2-Dichloroethene 5.00 4.51 90.2 73.0-120
trans-1,2-Dichloroethene 5.00 4.72 94.4 73.0-120
1,2-Dichloropropane 5.00 4.82 96.4 77.0-125
1,1-Dichloropropene 5.00 4.82 96.4 74.0-126
1,3-Dichloropropane 5.00 4.96 99.2 80.0-120
cis-1,3-Dichloropropene 5.00 3.87 77.4 80.0-123 J4
trans-1,3-Dichloropropene 5.00 3.94 78.8 78.0-124
trans-1,4-Dichloro-2-butene 5.00 1.40 28.0 33.0-144 J4
2,2-Dichloropropane 5.00 3.14 62.8 58.0-130
Di-isopropyl ether 5.00 4.17 83.4 58.0-138
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (GC/MS) by Method 8260B L1477353-01,02 Laboratory Control Sample (LCS)
(LCS) R3777594-1 04/03/22 13:57
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Ethylbenzene 5.00 4.79 95.8 79.0-123
Hexachloro-1,3-butadiene 5.00 4.68 93.6 54.0-138
2-Hexanone 25.0 23.7 94.8 67.0-149
n-Hexane 5.00 4.93 98.6 57.0-133
Iodomethane 25.0 22.3 89.2 33.0-147
Isopropylbenzene 5.00 4.58 91.6 76.0-127
p-Isopropyltoluene 5.00 4.63 92.6 76.0-125
2-Butanone (MEK) 25.0 22.2 88.8 44.0-160
Methylene Chloride 5.00 4.95 99.0 67.0-120
4-Methyl-2-pentanone (MIBK) 25.0 22.6 90.4 68.0-142
Methyl tert-butyl ether 5.00 4.65 93.0 68.0-125
Naphthalene 5.00 4.67 93.4 54.0-135
n-Propylbenzene 5.00 4.79 95.8 77.0-124
Styrene 5.00 3.85 77.0 73.0-130
1,1,1,2-Tetrachloroethane 5.00 4.38 87.6 75.0-125
1,1,2,2-Tetrachloroethane 5.00 4.87 97.4 65.0-130
1,1,2-Trichlorotrifluoroethane 5.00 5.11 102 69.0-132
Tetrachloroethene 5.00 4.69 93.8 72.0-132
Toluene 5.00 4.78 95.6 79.0-120
1,2,3-Trichlorobenzene 5.00 4.99 99.8 50.0-138
1,2,4-Trichlorobenzene 5.00 4.78 95.6 57.0-137
1,1,1-Trichloroethane 5.00 4.53 90.6 73.0-124
1,1,2-Trichloroethane 5.00 4.89 97.8 80.0-120
Trichloroethene 5.00 4.73 94.6 78.0-124
Trichlorofluoromethane 5.00 4.73 94.6 59.0-147
1,2,3-Trichloropropane 5.00 5.19 104 73.0-130
1,2,4-Trimethylbenzene 5.00 4.74 94.8 76.0-121
1,2,3-Trimethylbenzene 5.00 6.23 125 77.0-120 J4
1,3,5-Trimethylbenzene 5.00 4.72 94.4 76.0-122
Vinyl acetate 25.0 14.4 57.6 11.0-160
Vinyl chloride 5.00 3.94 78.8 67.0-131
Xylenes, Total 15.0 14.0 93.3 79.0-123
(S) Toluene-d8 107 80.0-120
(S) 4-Bromofluorobenzene 102 77.0-126
(S) 1,2-Dichloroethane-d4 89.6 70.0-130
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1477353-01,02 Method Blank (MB)
(MB) R3778359-1 04/06/22 21:14
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
C12-C22 Hydrocarbons U 33.0 100
C22-C32 Hydrocarbons U 33.0 100
C32-C40 Hydrocarbons U 33.0 100
(S) o-Terphenyl 66.0 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3778359-2 04/06/22 21:34 • (LCSD) R3778359-3 04/06/22 21:54 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/l ug/l ug/l % % % % %
C12-C22 Hydrocarbons 750 684 693 91.2 92.4 50.0-150 1.31 20 C22-C32 Hydrocarbons 750 698 704 93.1 93.9 50.0-150 0.856 20 (S) o-Terphenyl 85.0 88.5 52.0-156
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
J2 Surrogate recovery limits have been exceeded; values are outside lower control limits.

J4 The associated batch QC was outside the established quality control range for accuracy. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1477353 04/08/22 08:14 7966 of 11211 16 of 18 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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ANALYTICAL REPORT
April 14, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1480609
Samples Received: 04/09/2022
Project Number: 01-PRO-011
Description: 4th and Railroad Task 2B
Report To: Kirsten Duey
1371 Oakland Blvd.

Suite 200
Walnut Creek, CA 94596
Entire Report Reviewed By:

April 14, 2022
[Preliminary Report]
Jordan N Zito
Project Manager
Results relate only to the items tested or calibrated and are reported as rounded values. This test report shall not be reproduced, except in full, without written approval of the laboratory. Where applicable, sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068. Where sampling conducted by the customer, results relate to the accuracy of the information provided, and as the samples are received.

Pace Analytical National
12065 Lebanon Rd Mount Juliet, TN 37122 615-758-5858 800-767-5859 www.pacenational.com 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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Jordan N Zito
Project Manager
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TABLE OF CONTENTS
Cp: Cover Page 1
Tc: Table of Contents 2
Ss: Sample Summary 3
Cn: Case Narrative 4
Ds: Detection Summary 5
Sr: Sample Results 7
SVP-4-14.5' L1480609-01 7
SVP-3-14.5' L1480609-02 9
SVP-2-14.5' L1480609-03 11
SVP-1-14.5' L1480609-04 13
Qc: Quality Control Summary 15
Volatile Organic Compounds (MS) by Method TO-15 15
Organic Compounds (GC) by Method ASTM 1946 21
Organic Compounds (GC) by Method D1946 22
Gl: Glossary of Terms 23
Al: Accreditations & Locations 24
Sc: Sample Chain of Custody 25
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
SVP-4-14.5' L1480609-01 Air G. Carr 04/08/22 08:11 04/09/22 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1847080 1 04/12/22 14:30 04/12/22 14:30 FKG Mt. Juliet, TN Organic Compounds (GC) by Method ASTM 1946 WG1848027 1 04/14/22 13:04 04/14/22 13:04 DBB Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1846202 1 04/12/22 14:52 04/12/22 14:52 DBB Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-3-14.5' L1480609-02 Air G. Carr 04/08/22 08:59 04/09/22 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1847080 1 04/12/22 15:10 04/12/22 15:10 FKG Mt. Juliet, TN Organic Compounds (GC) by Method ASTM 1946 WG1848027 1 04/14/22 14:34 04/14/22 14:34 DBB Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1846202 1 04/12/22 15:01 04/12/22 15:01 DBB Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-2-14.5' L1480609-03 Air G. Carr 04/08/22 09:48 04/09/22 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1847080 1 04/12/22 15:50 04/12/22 15:50 FKG Mt. Juliet, TN Volatile Organic Compounds (MS) by Method TO-15 WG1847777 50 04/13/22 11:54 04/13/22 11:54 CEP Mt. Juliet, TN Organic Compounds (GC) by Method ASTM 1946 WG1848027 1 04/14/22 14:43 04/14/22 14:43 DBB Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1846202 1 04/12/22 15:14 04/12/22 15:14 DBB Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-1-14.5' L1480609-04 Air G. Carr 04/08/22 10:38 04/09/22 09:30 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1847080 1 04/12/22 16:30 04/12/22 16:30 FKG Mt. Juliet, TN Volatile Organic Compounds (MS) by Method TO-15 WG1847755 1 04/13/22 12:49 04/13/22 12:49 DAH Mt. Juliet, TN Organic Compounds (GC) by Method ASTM 1946 WG1848027 1 04/14/22 14:47 04/14/22 14:47 DBB Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1846202 1 04/12/22 15:21 04/12/22 15:21 DBB Mt. Juliet, TN 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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CASE NARRATIVE
Unless qualified or notated within the narrative below, all sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental samples have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. [Preliminary Report]
Jordan N Zito
Project Manager
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/14/22 16:35 4 of 25 Jordan N Zito
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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DETECTION SUMMARY
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilutio n
Batch
Client ID Lab Sample ID Analyte ppbv ug/m3 ppbv ug/m3
SVP-4-14.5' L1480609-01 Acetone 67-64-1 58.10 1.25 2.97 1.37 3.26 1 WG1847080 SVP-4-14.5' L1480609-01 Benzene 71-43-2 78.10 0.200 0.639 0.216 0.690 1 WG1847080 SVP-4-14.5' L1480609-01 Carbon disulfide 75-15-0 76.10 0.200 0.622 1.21 3.77 1 WG1847080 SVP-4-14.5' L1480609-01 Chloromethane 74-87-3 50.50 0.200 0.413 0.263 0.543 1 WG1847080 SVP-4-14.5' L1480609-01 Ethanol 64-17-5 46.10 1.25 2.36 3.17 5.98 1 WG1847080 SVP-4-14.5' L1480609-01 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.221 1.24 1 WG1847080 SVP-4-14.5' L1480609-01 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.567 2.80 1 WG1847080 SVP-4-14.5' L1480609-01 Tetrachloroethylene 127-18-4 166 0.200 1.36 5.59 38.0 1 WG1847080 SVP-4-14.5' L1480609-01 Toluene 108-88-3 92.10 0.500 1.88 0.520 1.96 1 WG1847080 SVP-4-14.5' L1480609-01 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.573 3.12 1 WG1847080 SVP-4-14.5' L1480609-01 m&p-Xylene 1330-20-7 106 0.400 1.73 0.466 2.02 1 WG1847080 SVP-3-14.5' L1480609-02 Acetone 67-64-1 58.10 1.25 2.97 2.67 6.34 1 WG1847080 SVP-3-14.5' L1480609-02 Benzene 71-43-2 78.10 0.200 0.639 1.50 4.79 1 WG1847080 SVP-3-14.5' L1480609-02 Cyclohexane 110-82-7 84.20 0.200 0.689 0.433 1.49 1 WG1847080 SVP-3-14.5' L1480609-02 Ethanol 64-17-5 46.10 1.25 2.36 5.88 11.1 1 WG1847080 SVP-3-14.5' L1480609-02 Ethylbenzene 100-41-4 106 0.200 0.867 1.12 4.86 1 WG1847080 SVP-3-14.5' L1480609-02 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.302 1.48 1 WG1847080 SVP-3-14.5' L1480609-02 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.225 1.26 1 WG1847080 SVP-3-14.5' L1480609-02 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.574 2.84 1 WG1847080 SVP-3-14.5' L1480609-02 Heptane 142-82-5 100 0.200 0.818 0.902 3.69 1 WG1847080 SVP-3-14.5' L1480609-02 Tetrachloroethylene 127-18-4 166 0.200 1.36 73.9 502 1 WG1847080 SVP-3-14.5' L1480609-02 Toluene 108-88-3 92.10 0.500 1.88 3.14 11.8 1 WG1847080 SVP-3-14.5' L1480609-02 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.366 1.99 1 WG1847080 SVP-3-14.5' L1480609-02 Trichloroethylene 79-01-6 131 0.200 1.07 2.18 11.7 1 WG1847080 SVP-3-14.5' L1480609-02 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 1.01 4.96 1 WG1847080 SVP-3-14.5' L1480609-02 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.320 1.57 1 WG1847080 SVP-3-14.5' L1480609-02 m&p-Xylene 1330-20-7 106 0.400 1.73 4.32 18.7 1 WG1847080 SVP-3-14.5' L1480609-02 o-Xylene 95-47-6 106 0.200 0.867 2.01 8.71 1 WG1847080 SVP-3-14.5' L1480609-02 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 271 1120 1 WG1847080 SVP-2-14.5' L1480609-03 Acetone 67-64-1 58.10 1.25 2.97 19.1 45.4 1 WG1847080 SVP-2-14.5' L1480609-03 Benzene 71-43-2 78.10 0.200 0.639 2.84 9.07 1 WG1847080 SVP-2-14.5' L1480609-03 Carbon disulfide 75-15-0 76.10 0.200 0.622 5.59 17.4 1 WG1847080 SVP-2-14.5' L1480609-03 Chloroform 67-66-3 119 0.200 0.973 2.35 11.4 1 WG1847080 SVP-2-14.5' L1480609-03 Chloromethane 74-87-3 50.50 0.200 0.413 0.368 0.760 1 WG1847080 SVP-2-14.5' L1480609-03 Cyclohexane 110-82-7 84.20 0.200 0.689 0.806 2.78 1 WG1847080 SVP-2-14.5' L1480609-03 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 9.89 39.2 1 WG1847080 SVP-2-14.5' L1480609-03 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 0.516 2.05 1 WG1847080 SVP-2-14.5' L1480609-03 Ethanol 64-17-5 46.10 1.25 2.36 6.15 11.6 1 WG1847080 SVP-2-14.5' L1480609-03 Ethylbenzene 100-41-4 106 0.200 0.867 2.31 10.0 1 WG1847080 SVP-2-14.5' L1480609-03 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.614 3.01 1 WG1847080 SVP-2-14.5' L1480609-03 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.223 1.25 1 WG1847080 SVP-2-14.5' L1480609-03 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.463 2.29 1 WG1847080 SVP-2-14.5' L1480609-03 Heptane 142-82-5 100 0.200 0.818 2.02 8.26 1 WG1847080 SVP-2-14.5' L1480609-03 n-Hexane 110-54-3 86.20 0.630 2.22 1.11 3.91 1 WG1847080 SVP-2-14.5' L1480609-03 Methylene Chloride 75-09-2 84.90 0.200 0.694 0.264 0.917 1 WG1847080 SVP-2-14.5' L1480609-03 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 2.80 8.26 1 WG1847080 SVP-2-14.5' L1480609-03 Propene 115-07-1 42.10 1.25 2.15 5.77 9.94 1 WG1847080 SVP-2-14.5' L1480609-03 Tetrachloroethylene 127-18-4 166 10.0 67.9 615 4180 50 WG1847777 SVP-2-14.5' L1480609-03 Toluene 108-88-3 92.10 0.500 1.88 7.82 29.5 1 WG1847080 SVP-2-14.5' L1480609-03 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.431 2.34 1 WG1847080 SVP-2-14.5' L1480609-03 Trichloroethylene 79-01-6 131 10.0 53.6 79.2 424 50 WG1847777 SVP-2-14.5' L1480609-03 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 1.72 8.44 1 WG1847080 SVP-2-14.5' L1480609-03 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.511 2.51 1 WG1847080 SVP-2-14.5' L1480609-03 m&p-Xylene 1330-20-7 106 0.400 1.73 7.54 32.7 1 WG1847080 SVP-2-14.5' L1480609-03 o-Xylene 95-47-6 106 0.200 0.867 3.36 14.6 1 WG1847080 SVP-2-14.5' L1480609-03 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 2040 8430 1 WG1847080 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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DETECTION SUMMARY
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilutio n
Batch
Client ID Lab Sample ID Analyte ppbv ug/m3 ppbv ug/m3
SVP-1-14.5' L1480609-04 Acetone 67-64-1 58.10 1.25 2.97 2.64 6.27 1 WG1847080 SVP-1-14.5' L1480609-04 Benzene 71-43-2 78.10 0.200 0.639 0.447 1.43 1 WG1847080 SVP-1-14.5' L1480609-04 Carbon disulfide 75-15-0 76.10 0.200 0.622 1.38 4.30 1 WG1847080 SVP-1-14.5' L1480609-04 Chloroform 67-66-3 119 0.200 0.973 0.455 2.21 1 WG1847080 SVP-1-14.5' L1480609-04 Chloromethane 74-87-3 50.50 0.200 0.413 0.217 0.448 1 WG1847080 SVP-1-14.5' L1480609-04 Cyclohexane 110-82-7 84.20 0.200 0.689 0.341 1.17 1 WG1847080 SVP-1-14.5' L1480609-04 Ethanol 64-17-5 46.10 1.25 2.36 21.7 40.9 1 WG1847080 SVP-1-14.5' L1480609-04 Ethylbenzene 100-41-4 106 0.200 0.867 0.401 1.74 1 WG1847080 SVP-1-14.5' L1480609-04 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.228 1.28 1 WG1847080 SVP-1-14.5' L1480609-04 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.516 2.55 1 WG1847080 SVP-1-14.5' L1480609-04 2-Propanol 67-63-0 60.10 1.25 3.07 1.38 3.39 1 WG1847080 SVP-1-14.5' L1480609-04 Tetrachloroethylene 127-18-4 166 0.200 1.36 0.554 3.76 1 WG1847755 SVP-1-14.5' L1480609-04 Toluene 108-88-3 92.10 0.500 1.88 1.71 6.44 1 WG1847080 SVP-1-14.5' L1480609-04 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.241 1.31 1 WG1847080 SVP-1-14.5' L1480609-04 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.218 1.07 1 WG1847080 SVP-1-14.5' L1480609-04 m&p-Xylene 1330-20-7 106 0.400 1.73 1.42 6.16 1 WG1847080 SVP-1-14.5' L1480609-04 o-Xylene 95-47-6 106 0.200 0.867 0.568 2.46 1 WG1847080 Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Client ID Lab Sample ID Analyte % %
SVP-3-14.5' L1480609-02 Helium 7440-59-7 0.100 0.177 1 WG1848027 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Client ID Lab Sample ID Analyte % %
SVP-4-14.5' L1480609-01 Oxygen 7782-44-7 32 5.00 19.7 1 WG1846202 SVP-4-14.5' L1480609-01 Carbon Dioxide 124-38-9 44.01 0.500 1.61 1 WG1846202 SVP-3-14.5' L1480609-02 Oxygen 7782-44-7 32 5.00 19.1 1 WG1846202 SVP-3-14.5' L1480609-02 Carbon Dioxide 124-38-9 44.01 0.500 2.16 1 WG1846202 SVP-2-14.5' L1480609-03 Oxygen 7782-44-7 32 5.00 19.7 1 WG1846202 SVP-2-14.5' L1480609-03 Carbon Dioxide 124-38-9 44.01 0.500 1.05 1 WG1846202 SVP-1-14.5' L1480609-04 Oxygen 7782-44-7 32 5.00 20.9 1 WG1846202 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1480609
SVP-4-14.5'
Collected date/time: 04/08/22 08:11
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
Acetone 67-64-1 58.10 1.25 2.97 1.37 3.26 1 WG1847080
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1847080 Benzene 71-43-2 78.10 0.200 0.639 0.216 0.690 1 WG1847080 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1847080 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1847080 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1847080
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1847080 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1847080 Carbon disulfide 75-15-0 76.10 0.200 0.622 1.21 3.77 1 WG1847080 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1847080 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1847080 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1847080 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1847080
Chloromethane 74-87-3 50.50 0.200 0.413 0.263 0.543 1 WG1847080 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1847080 Cyclohexane 110-82-7 84.20 0.200 0.689 ND ND 1 WG1847080 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1847080 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1847080 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1847080 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1847080 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1847080 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1847080 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1847080 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1847080 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1847080 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1847080 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1847080 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1847080 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1847080 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1847080 Ethanol 64-17-5 46.10 1.25 2.36 3.17 5.98 1 WG1847080
Ethylbenzene 100-41-4 106 0.200 0.867 ND ND 1 WG1847080 4-Ethyltoluene 622-96-8 120 0.200 0.982 ND ND 1 WG1847080 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.221 1.24 1 WG1847080 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.567 2.80 1 WG1847080 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG1847080 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1847080 Heptane 142-82-5 100 0.200 0.818 ND ND 1 WG1847080
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1847080 n-Hexane 110-54-3 86.20 0.630 2.22 ND ND 1 WG1847080
Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1847080 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1847080 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1847080 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG1847080 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1847080 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1847080 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1847080
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1847080
2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG1847080
Propene 115-07-1 42.10 1.25 2.15 ND ND 1 WG1847080
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1847080
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1847080 Tetrachloroethylene 127-18-4 166 0.200 1.36 5.59 38.0 1 WG1847080 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1847080 Toluene 108-88-3 92.10 0.500 1.88 0.520 1.96 1 WG1847080 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1847080 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1480609
SVP-4-14.5'
Collected date/time: 04/08/22 08:11
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.573 3.12 1 WG1847080 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1847080 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1847080 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 ND ND 1 WG1847080 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1847080 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1847080 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1847080 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1847080 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1847080 m&p-Xylene 1330-20-7 106 0.400 1.73 0.466 2.02 1 WG1847080 o-Xylene 95-47-6 106 0.200 0.867 ND ND 1 WG1847080
TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 99.7 WG1847080 Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1848027
Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 19.7 1 WG1846202
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1846202
Carbon Dioxide 124-38-9 44.01 0.500 1.61 1 WG1846202
Methane 74-82-8 16 0.400 ND 1 WG1846202
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7976 of 11211 8 of 25 SAMPLE RESULTS - 02
L1480609
SVP-3-14.5'
Collected date/time: 04/08/22 08:59
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
Acetone 67-64-1 58.10 1.25 2.97 2.67 6.34 1 WG1847080
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1847080 Benzene 71-43-2 78.10 0.200 0.639 1.50 4.79 1 WG1847080 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1847080 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1847080 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1847080
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1847080 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1847080 Carbon disulfide 75-15-0 76.10 0.200 0.622 ND ND 1 WG1847080 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1847080 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1847080 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1847080 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1847080
Chloromethane 74-87-3 50.50 0.200 0.413 ND ND 1 WG1847080 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1847080 Cyclohexane 110-82-7 84.20 0.200 0.689 0.433 1.49 1 WG1847080 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1847080 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1847080 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1847080 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1847080 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1847080 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1847080 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1847080 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1847080 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1847080 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1847080 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1847080 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1847080 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1847080 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1847080 Ethanol 64-17-5 46.10 1.25 2.36 5.88 11.1 1 WG1847080
Ethylbenzene 100-41-4 106 0.200 0.867 1.12 4.86 1 WG1847080 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.302 1.48 1 WG1847080 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.225 1.26 1 WG1847080 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.574 2.84 1 WG1847080 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG1847080 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1847080 Heptane 142-82-5 100 0.200 0.818 0.902 3.69 1 WG1847080 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1847080 n-Hexane 110-54-3 86.20 0.630 2.22 ND ND 1 WG1847080
Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1847080 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1847080 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1847080 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG1847080 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1847080 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1847080 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1847080
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1847080
2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG1847080
Propene 115-07-1 42.10 1.25 2.15 ND ND 1 WG1847080
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1847080
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1847080 Tetrachloroethylene 127-18-4 166 0.200 1.36 73.9 502 1 WG1847080 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1847080 Toluene 108-88-3 92.10 0.500 1.88 3.14 11.8 1 WG1847080 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1847080 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/14/22 16:35 9 of 25 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7977 of 11211 9 of 25 SAMPLE RESULTS - 02
L1480609
SVP-3-14.5'
Collected date/time: 04/08/22 08:59
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.366 1.99 1 WG1847080 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1847080 Trichloroethylene 79-01-6 131 0.200 1.07 2.18 11.7 1 WG1847080 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 1.01 4.96 1 WG1847080 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.320 1.57 1 WG1847080 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1847080 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1847080 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1847080 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1847080 m&p-Xylene 1330-20-7 106 0.400 1.73 4.32 18.7 1 WG1847080 o-Xylene 95-47-6 106 0.200 0.867 2.01 8.71 1 WG1847080
TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 271 1120 1 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 103 WG1847080 Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 0.177 1 WG1848027
Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 19.1 1 WG1846202
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1846202
Carbon Dioxide 124-38-9 44.01 0.500 2.16 1 WG1846202
Methane 74-82-8 16 0.400 ND 1 WG1846202
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7978 of 11211 10 of 25 SAMPLE RESULTS - 03
L1480609
SVP-2-14.5'
Collected date/time: 04/08/22 09:48
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
Acetone 67-64-1 58.10 1.25 2.97 19.1 45.4 1 WG1847080
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1847080 Benzene 71-43-2 78.10 0.200 0.639 2.84 9.07 1 WG1847080 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1847080 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1847080 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1847080
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1847080 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1847080 Carbon disulfide 75-15-0 76.10 0.200 0.622 5.59 17.4 1 WG1847080 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1847080 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1847080 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1847080 Chloroform 67-66-3 119 0.200 0.973 2.35 11.4 1 WG1847080 Chloromethane 74-87-3 50.50 0.200 0.413 0.368 0.760 1 WG1847080 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1847080 Cyclohexane 110-82-7 84.20 0.200 0.689 0.806 2.78 1 WG1847080 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1847080 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1847080 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1847080 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1847080 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1847080 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1847080 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1847080 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1847080 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 9.89 39.2 1 WG1847080 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 0.516 2.05 1 WG1847080 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1847080 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1847080 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1847080 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1847080 Ethanol 64-17-5 46.10 1.25 2.36 6.15 11.6 1 WG1847080
Ethylbenzene 100-41-4 106 0.200 0.867 2.31 10.0 1 WG1847080 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.614 3.01 1 WG1847080 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.223 1.25 1 WG1847080 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.463 2.29 1 WG1847080 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG1847080 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1847080 Heptane 142-82-5 100 0.200 0.818 2.02 8.26 1 WG1847080
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1847080 n-Hexane 110-54-3 86.20 0.630 2.22 1.11 3.91 1 WG1847080 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1847080 Methylene Chloride 75-09-2 84.90 0.200 0.694 0.264 0.917 1 WG1847080 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1847080 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 2.80 8.26 1 WG1847080 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1847080 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1847080 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1847080
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1847080
2-Propanol 67-63-0 60.10 1.25 3.07 ND ND 1 WG1847080
Propene 115-07-1 42.10 1.25 2.15 5.77 9.94 1 WG1847080
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1847080
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1847080 Tetrachloroethylene 127-18-4 166 10.0 67.9 615 4180 50 WG1847777 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1847080 Toluene 108-88-3 92.10 0.500 1.88 7.82 29.5 1 WG1847080 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1847080 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/14/22 16:35 11 of 25 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7979 of 11211 11 of 25 SAMPLE RESULTS - 03
L1480609
SVP-2-14.5'
Collected date/time: 04/08/22 09:48
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.431 2.34 1 WG1847080 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1847080 Trichloroethylene 79-01-6 131 10.0 53.6 79.2 424 50 WG1847777 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 1.72 8.44 1 WG1847080 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.511 2.51 1 WG1847080 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1847080 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1847080 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1847080 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1847080 m&p-Xylene 1330-20-7 106 0.400 1.73 7.54 32.7 1 WG1847080 o-Xylene 95-47-6 106 0.200 0.867 3.36 14.6 1 WG1847080
TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 2040 8430 1 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 105 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 100 WG1847777 Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1848027
Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 19.7 1 WG1846202
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1846202
Carbon Dioxide 124-38-9 44.01 0.500 1.05 1 WG1846202
Methane 74-82-8 16 0.400 ND 1 WG1846202
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7980 of 11211 12 of 25 SAMPLE RESULTS - 04
L1480609
SVP-1-14.5'
Collected date/time: 04/08/22 10:38
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
Acetone 67-64-1 58.10 1.25 2.97 2.64 6.27 1 WG1847080
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1847080 Benzene 71-43-2 78.10 0.200 0.639 0.447 1.43 1 WG1847080 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1847080 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1847080 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1847080
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1847080 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1847080 Carbon disulfide 75-15-0 76.10 0.200 0.622 1.38 4.30 1 WG1847080 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1847080 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1847080 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1847080 Chloroform 67-66-3 119 0.200 0.973 0.455 2.21 1 WG1847080 Chloromethane 74-87-3 50.50 0.200 0.413 0.217 0.448 1 WG1847080 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1847080 Cyclohexane 110-82-7 84.20 0.200 0.689 0.341 1.17 1 WG1847080 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1847080 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1847080 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1847080 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1847080 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1847080 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1847080 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1847080 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1847080 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1847080 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1847080 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1847080 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1847080 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1847080 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1847080 Ethanol 64-17-5 46.10 1.25 2.36 21.7 40.9 1 WG1847080
Ethylbenzene 100-41-4 106 0.200 0.867 0.401 1.74 1 WG1847080 4-Ethyltoluene 622-96-8 120 0.200 0.982 ND ND 1 WG1847080 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.228 1.28 1 WG1847080 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.516 2.55 1 WG1847080 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 ND ND 1 WG1847080 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1847080 Heptane 142-82-5 100 0.200 0.818 ND ND 1 WG1847080
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1847080 n-Hexane 110-54-3 86.20 0.630 2.22 ND ND 1 WG1847080
Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1847080 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1847080 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1847080 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 ND ND 1 WG1847080 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1847080 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1847080 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1847080
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1847080
2-Propanol 67-63-0 60.10 1.25 3.07 1.38 3.39 1 WG1847080 Propene 115-07-1 42.10 1.25 2.15 ND ND 1 WG1847080
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1847080
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1847080 Tetrachloroethylene 127-18-4 166 0.200 1.36 0.554 3.76 1 WG1847755 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1847080 Toluene 108-88-3 92.10 0.500 1.88 1.71 6.44 1 WG1847080 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1847080 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7981 of 11211 13 of 25 SAMPLE RESULTS - 04
L1480609
SVP-1-14.5'
Collected date/time: 04/08/22 10:38
Volatile Organic Compounds (MS) by Method TO-15
CAS # Mol. Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Analyte ppbv ug/m3 ppbv ug/m3
1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.241 1.31 1 WG1847080 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1847080 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1847080 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.218 1.07 1 WG1847080 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1847080 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1847080 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1847080 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1847080 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1847080 m&p-Xylene 1330-20-7 106 0.400 1.73 1.42 6.16 1 WG1847080 o-Xylene 95-47-6 106 0.200 0.867 0.568 2.46 1 WG1847080 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 106 WG1847080 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 99.5 WG1847755 Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1848027
Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 20.9 1 WG1846202
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1846202
Carbon Dioxide 124-38-9 44.01 0.500 ND 1 WG1846202
Methane 74-82-8 16 0.400 ND 1 WG1846202
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7982 of 11211 14 of 25 WG1847080 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1480609-01,02,03,04 Method Blank (MB)
(MB) R3780442-3 04/12/22 10:22
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
Acetone U 0.584 1.25
Allyl Chloride U 0.114 0.200
Benzene U 0.0715 0.200
Benzyl Chloride U 0.0598 0.200
Bromodichloromethane U 0.0702 0.200
Bromoform U 0.0732 0.600
Bromomethane U 0.0982 0.200
1,3-Butadiene U 0.104 2.00
Carbon disulfide U 0.102 0.200
Carbon tetrachloride U 0.0732 0.200
Chlorobenzene U 0.0832 0.200
Chloroethane U 0.0996 0.200
Chloroform U 0.0717 0.200
Chloromethane U 0.103 0.200
2-Chlorotoluene U 0.0828 0.200
Cyclohexane U 0.0753 0.200
Dibromochloromethane U 0.0727 0.200
1,2-Dibromoethane U 0.0721 0.200
1,2-Dichlorobenzene U 0.128 0.200
1,3-Dichlorobenzene U 0.182 0.200
1,4-Dichlorobenzene U 0.0557 0.200
1,2-Dichloroethane U 0.0700 0.200
1,1-Dichloroethane U 0.0723 0.200
1,1-Dichloroethene U 0.0762 0.200
cis-1,2-Dichloroethene U 0.0784 0.200
trans-1,2-Dichloroethene U 0.0673 0.200
1,2-Dichloropropane U 0.0760 0.200
cis-1,3-Dichloropropene U 0.0689 0.200
trans-1,3-Dichloropropene U 0.0728 0.200
1,4-Dioxane U 0.0833 0.200
Ethanol U 0.265 1.25
Ethylbenzene U 0.0835 0.200
4-Ethyltoluene U 0.0783 0.200
Trichlorofluoromethane U 0.0819 0.200
Dichlorodifluoromethane U 0.137 0.200
1,1,2-Trichlorotrifluoroethane U 0.0793 0.200
1,2-Dichlorotetrafluoroethane U 0.0890 0.200
Heptane U 0.104 0.200
Hexachloro-1,3-butadiene U 0.105 0.630
n-Hexane U 0.206 0.630
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (MS) by Method TO-15 L1480609-01,02,03,04 Method Blank (MB)
(MB) R3780442-3 04/12/22 10:22
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
Isopropylbenzene U 0.0777 0.200
Methylene Chloride U 0.0979 0.200
Methyl Butyl Ketone U 0.133 1.25
2-Butanone (MEK) U 0.0814 1.25
4-Methyl-2-pentanone (MIBK) U 0.0765 1.25
Methyl Methacrylate U 0.0876 0.200
MTBE U 0.0647 0.200
Naphthalene U 0.350 0.630
2-Propanol U 0.264 1.25
Propene 0.139 J 0.0932 1.25
Styrene U 0.0788 0.200
1,1,2,2-Tetrachloroethane U 0.0743 0.200
Tetrachloroethylene U 0.0814 0.200
Tetrahydrofuran U 0.0734 0.200
Toluene U 0.0870 0.500
1,2,4-Trichlorobenzene U 0.148 0.630
1,1,1-Trichloroethane U 0.0736 0.200
1,1,2-Trichloroethane U 0.0775 0.200
Trichloroethylene U 0.0680 0.200
1,2,4-Trimethylbenzene U 0.0764 0.200
1,3,5-Trimethylbenzene U 0.0779 0.200
2,2,4-Trimethylpentane U 0.133 0.200
Vinyl chloride U 0.0949 0.200
Vinyl Bromide U 0.0852 0.200
Vinyl acetate U 0.116 0.200
m&p-Xylene U 0.135 0.400
o-Xylene U 0.0828 0.200
TPH (GC/MS) Low Fraction U 39.7 200
(S) 1,4-Bromofluorobenzene 99.3 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780442-1 04/12/22 09:04 • (LCSD) R3780442-2 04/12/22 09:44 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
Acetone 3.75 4.14 4.08 110 109 70.0-130 1.46 25
Allyl Chloride 3.75 4.30 4.36 115 116 70.0-130 1.39 25
Benzene 3.75 4.15 4.03 111 107 70.0-130 2.93 25
Benzyl Chloride 3.75 4.10 4.13 109 110 70.0-152 0.729 25 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (MS) by Method TO-15 L1480609-01,02,03,04 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780442-1 04/12/22 09:04 • (LCSD) R3780442-2 04/12/22 09:44 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
Bromodichloromethane 3.75 4.05 4.00 108 107 70.0-130 1.24 25 Bromoform 3.75 4.04 3.98 108 106 70.0-130 1.50 25
Bromomethane 3.75 4.08 4.04 109 108 70.0-130 0.985 25
1,3-Butadiene 3.75 3.99 3.92 106 105 70.0-130 1.77 25
Carbon disulfide 3.75 4.21 4.13 112 110 70.0-130 1.92 25 Carbon tetrachloride 3.75 3.96 3.91 106 104 70.0-130 1.27 25 Chlorobenzene 3.75 4.07 4.00 109 107 70.0-130 1.73 25
Chloroethane 3.75 4.08 4.15 109 111 70.0-130 1.70 25
Chloroform 3.75 4.12 4.05 110 108 70.0-130 1.71 25
Chloromethane 3.75 4.21 4.13 112 110 70.0-130 1.92 25
2-Chlorotoluene 3.75 4.09 4.04 109 108 70.0-130 1.23 25 Cyclohexane 3.75 4.19 4.09 112 109 70.0-130 2.42 25
Dibromochloromethane 3.75 4.03 3.96 107 106 70.0-130 1.75 25 1,2-Dibromoethane 3.75 4.07 3.98 109 106 70.0-130 2.24 25 1,2-Dichlorobenzene 3.75 4.00 4.00 107 107 70.0-130 0.000 25 1,3-Dichlorobenzene 3.75 4.02 3.99 107 106 70.0-130 0.749 25 1,4-Dichlorobenzene 3.75 4.05 3.98 108 106 70.0-130 1.74 25 1,2-Dichloroethane 3.75 4.11 4.02 110 107 70.0-130 2.21 25 1,1-Dichloroethane 3.75 4.16 4.15 111 111 70.0-130 0.241 25 1,1-Dichloroethene 3.75 4.13 4.07 110 109 70.0-130 1.46 25 cis-1,2-Dichloroethene 3.75 4.16 4.08 111 109 70.0-130 1.94 25 trans-1,2-Dichloroethene 3.75 4.20 4.16 112 111 70.0-130 0.957 25 1,2-Dichloropropane 3.75 4.17 4.12 111 110 70.0-130 1.21 25 cis-1,3-Dichloropropene 3.75 4.05 3.99 108 106 70.0-130 1.49 25 trans-1,3-Dichloropropene 3.75 4.07 3.97 109 106 70.0-130 2.49 25 1,4-Dioxane 3.75 4.11 3.98 110 106 70.0-140 3.21 25
Ethanol 3.75 4.06 3.95 108 105 55.0-148 2.75 25
Ethylbenzene 3.75 4.14 4.06 110 108 70.0-130 1.95 25
4-Ethyltoluene 3.75 4.10 4.10 109 109 70.0-130 0.000 25 Trichlorofluoromethane 3.75 3.97 3.94 106 105 70.0-130 0.759 25 Dichlorodifluoromethane 3.75 4.06 4.00 108 107 64.0-139 1.49 25 1,1,2-Trichlorotrifluoroethane 3.75 4.14 4.06 110 108 70.0-130 1.95 25 1,2-Dichlorotetrafluoroethane 3.75 4.11 4.05 110 108 70.0-130 1.47 25 Heptane 3.75 4.29 4.21 114 112 70.0-130 1.88 25
Hexachloro-1,3-butadiene 3.75 3.73 3.74 99.5 99.7 70.0-151 0.268 25 n-Hexane 3.75 4.26 4.20 114 112 70.0-130 1.42 25
Isopropylbenzene 3.75 4.09 4.05 109 108 70.0-130 0.983 25 Methylene Chloride 3.75 4.18 4.06 111 108 70.0-130 2.91 25 Methyl Butyl Ketone 3.75 4.32 4.22 115 113 70.0-149 2.34 25 Methyl Ethyl Ketone 3.75 4.18 4.20 111 112 70.0-130 0.477 25 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7985 of 11211 17 of 25 WG1847080 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1480609-01,02,03,04 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780442-1 04/12/22 09:04 • (LCSD) R3780442-2 04/12/22 09:44 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
4-Methyl-2-pentanone (MIBK) 3.75 4.24 4.18 113 111 70.0-139 1.43 25 Methyl Methacrylate 3.75 4.08 4.06 109 108 70.0-130 0.491 25 MTBE 3.75 4.14 4.09 110 109 70.0-130 1.22 25
Naphthalene 3.75 4.06 3.98 108 106 70.0-159 1.99 25
2-Propanol 3.75 4.22 4.08 113 109 70.0-139 3.37 25
Propene 3.75 4.17 4.18 111 111 64.0-144 0.240 25
Styrene 3.75 4.13 4.09 110 109 70.0-130 0.973 25
1,1,2,2-Tetrachloroethane 3.75 4.12 4.08 110 109 70.0-130 0.976 25 Tetrachloroethylene 3.75 3.96 3.91 106 104 70.0-130 1.27 25 Tetrahydrofuran 3.75 4.30 4.18 115 111 70.0-137 2.83 25 Toluene 3.75 4.09 4.02 109 107 70.0-130 1.73 25
1,2,4-Trichlorobenzene 3.75 3.91 3.87 104 103 70.0-160 1.03 25 1,1,1-Trichloroethane 3.75 4.05 4.00 108 107 70.0-130 1.24 25 1,1,2-Trichloroethane 3.75 4.12 4.05 110 108 70.0-130 1.71 25 Trichloroethylene 3.75 4.02 3.98 107 106 70.0-130 1.00 25 1,2,4-Trimethylbenzene 3.75 4.05 4.07 108 109 70.0-130 0.493 25 1,3,5-Trimethylbenzene 3.75 4.06 4.03 108 107 70.0-130 0.742 25 2,2,4-Trimethylpentane 3.75 4.27 4.21 114 112 70.0-130 1.42 25 Vinyl chloride 3.75 4.13 4.09 110 109 70.0-130 0.973 25 Vinyl Bromide 3.75 4.10 4.05 109 108 70.0-130 1.23 25
Vinyl acetate 3.75 4.49 4.38 120 117 70.0-130 2.48 25
m&p-Xylene 7.50 8.21 8.14 109 109 70.0-130 0.856 25
o-Xylene 3.75 4.06 4.01 108 107 70.0-130 1.24 25
TPH (GC/MS) Low Fraction 203 237 236 117 116 70.0-130 0.423 25 (S) 1,4-Bromofluorobenzene 99.7 100 60.0-140
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7986 of 11211 18 of 25 WG1847755 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1480609-04 Method Blank (MB)
(MB) R3780589-3 04/13/22 10:09
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
Tetrachloroethylene U 0.0814 0.200
(S) 1,4-Bromofluorobenzene 94.7 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780589-1 04/13/22 08:47 • (LCSD) R3780589-2 04/13/22 09:29 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
Tetrachloroethylene 3.75 4.71 4.74 126 126 70.0-130 0.635 25 (S) 1,4-Bromofluorobenzene 97.6 98.5 60.0-140
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Volatile Organic Compounds (MS) by Method TO-15 L1480609-03 Method Blank (MB)
(MB) R3780889-3 04/13/22 09:28
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
Tetrachloroethylene U 0.0814 0.200
Trichloroethylene U 0.0680 0.200
(S) 1,4-Bromofluorobenzene 99.8 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780889-1 04/13/22 08:29 • (LCSD) R3780889-2 04/13/22 08:59 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
Tetrachloroethylene 3.75 3.52 3.55 93.9 94.7 70.0-130 0.849 25 Trichloroethylene 3.75 3.48 3.49 92.8 93.1 70.0-130 0.287 25 (S) 1,4-Bromofluorobenzene 103 103 60.0-140
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Organic Compounds (GC) by Method ASTM 1946 L1480609-01,02,03,04 Method Blank (MB)
(MB) R3781169-3 04/14/22 10:03
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Helium U 0.0259 0.100
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3781169-1 04/14/22 08:36 • (LCSD) R3781169-2 04/14/22 08:50 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Helium 2.50 2.34 2.29 93.6 91.6 70.0-130 2.16 25
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7989 of 11211 21 of 25 WG1846202 QUALITY CONTROL SUMMARY
Organic Compounds (GC) by Method D1946 L1480609-01,02,03,04 Method Blank (MB)
(MB) R3780262-3 04/12/22 10:30
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Oxygen 1.67 0.225 5.00
Carbon Monoxide U 0.665 2.00
Carbon Dioxide U 0.121 0.500
Methane U 0.0584 0.400
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3780262-1 04/12/22 09:46 • (LCSD) R3780262-2 04/12/22 09:55 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Oxygen 20.0 21.3 21.1 106 106 70.0-130 0.943 20
Carbon Monoxide 2.50 2.83 2.77 113 111 70.0-130 2.14 20 Carbon Dioxide 2.50 2.52 2.49 101 99.6 70.0-130 1.20 20 Methane 2.00 2.05 2.01 103 101 70.0-130 1.97 20
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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GLOSSARY OF TERMS
Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

Results Disclaimer - Information that may be provided by the customer, and contained within this report, include Permit Limits, Project Name, Sample ID, Sample Matrix, Sample Preservation, Field Blanks, Field Spikes, Field Duplicates, On-Site Data, Sampling Collection Dates/Times, and Sampling Location. Results relate to the accuracy of this information provided, and as the samples are received.

Abbreviations and Definitions
MDL Method Detection Limit.

ND Not detected at the Reporting Limit (or MDL where applicable).

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.
(S)
Surrogate (Surrogate Standard) - Analytes added to every blank, sample, Laboratory Control Sample/Duplicate and Matrix Spike/Duplicate; used to evaluate analytical efficiency by measuring recovery. Surrogates are not expected to be detected in all environmental media.

U Not detected at the Reporting Limit (or MDL where applicable).

Analyte The name of the particular compound or analysis performed. Some Analyses and Methods will have multiple analytes reported.

Dilution
If the sample matrix contains an interfering material, the sample preparation volume or weight values differ from the standard, or if concentrations of analytes in the sample are higher than the highest limit of concentration that the laboratory can accurately report, the sample may be diluted for analysis. If a value different than 1 is used in this field, the result reported has already been corrected for this factor.

Limits
These are the target % recovery ranges or % difference value that the laboratory has historically determined as normal for the method and analyte being reported. Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges.

Qualifier
This column provides a letter and/or number designation that corresponds to additional information concerning the result reported. If a Qualifier is present, a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable.

Result
The actual analytical final result (corrected for any sample specific characteristics) reported for your sample. If there was no measurable result returned for a specific analyte, the result in this column may state “ND” (Not Detected) or “BDL” (Below Detectable Levels). The information in the results column should always be accompanied by either an MDL (Method Detection Limit) or RDL (Reporting Detection Limit) that defines the lowest value that the laboratory could detect or report for this analyte.

Uncertainty
(Radiochemistry) Confidence level of 2 sigma.

Case Narrative (Cn)
A brief discussion about the included sample results, including a discussion of any non-conformances to protocol observed either at sample receipt by the laboratory from the field or during the analytical process. If present, there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report.

Quality Control
Summary (Qc)
This section of the report includes the results of the laboratory quality control analyses required by procedure or analytical methods to assist in evaluating the validity of the results reported for your samples. These analyses are not being performed on your samples typically, but on laboratory generated material.

Sample Chain of
Custody (Sc)
This is the document created in the field when your samples were initially collected. This is used to verify the time and date of collection, the person collecting the samples, and the analyses that the laboratory is requested to perform. This chain of custody also documents all persons (excluding commercial shippers) that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis.

Sample Results (Sr)
This section of your report will provide the results of all testing performed on your samples. These results are provided by sample ID and are separated by the analyses performed on each sample. The header line of each analysis section for each sample will provide the name and method number for the analysis reported.

Sample Summary (Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID, including the dates and times of preparation and/or analysis.

Qualifier Description
J The identification of the analyte is acceptable; the reported value is an estimate. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-011 L1480609 04/15/22 08:48 7991 of 11211 23 of 25 Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 Alabama 40660 Nebraska NE-OS-15-05
Alaska 17-026 Nevada TN000032021-1
Arizona AZ0612 New Hampshire 2975
Arkansas 88-0469 New Jersey–NELAP TN002
California 2932 New Mexico ¹ TN00003
Colorado TN00003 New York 11742
Connecticut PH-0197 North Carolina Env375
Florida E87487 North Carolina ¹ DW21704
Georgia NELAP North Carolina ³ 41
Georgia ¹ 923 North Dakota R-140
Idaho TN00003 Ohio–VAP CL0069
Illinois 200008 Oklahoma 9915
Indiana C-TN-01 Oregon TN200002
Iowa 364 Pennsylvania 68-02979
Kansas E-10277 Rhode Island LAO00356
Kentucky ¹ ⁶ KY90010 South Carolina 84004002
Kentucky ² 16 South Dakota n/a
Louisiana AI30792 Tennessee ¹ ⁴ 2006
Louisiana LA018 Texas T104704245-20-18
Maine TN00003 Texas ⁵ LAB0152
Maryland 324 Utah TN000032021-11
Massachusetts M-TN003 Vermont VT2006
Michigan 9958 Virginia 110033
Minnesota 047-999-395 Washington C847
Mississippi TN00003 West Virginia 233
Missouri 340 Wisconsin 998093910
Montana CERT0086 Wyoming A2LA
A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789
A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01
Canada 1461.01 USDA P330-15-00234
EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS
¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable * Not all certifications held by the laboratory are applicable to the results reported in the attached report. * Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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PHASE l ENVIRONMENTAL SITE ASSESSMENT
302 East 4th Street
San Mateo, California
01-PRO-011
Prepared for:

Prometheus Real Estate Group
1900 South Norfolk Street, Suite 150
San Mateo, California 94403
Prepared By:
1371 Oakland Boulevard, Suite 200
Walnut Creek, California 94596
April 25, 2022
7994 of 11211
Phase I Environmental Site Assessment
302 East 4th Street, San Mateo, California April 25, 2022 i RMD ENVIRONMENTAL SOLUTIONS, INC.

TABLE OF CONTENTS
Page

1.0 INTRODUCTION ............................................................................................................ 1-1

1.1 Purpose.............................................................................................................. 1-1

1.2 Scope of Services............................................................................................... 1-1

1.3 Significant Assumptions..................................................................................... 1-1

1.4 Limitations and Exceptions ................................................................................ 1-2

1.5 User Reliance ..................................................................................................... 1-3

2.0 SITE AND VICINITY DESCRIPTION ............................................................................... 2-1

2.1 Current Ownership ............................................................................................ 2-1

2.2 Current Site Use and Improvements.................................................................. 2-1

2.3 Current Use of Adjoining and Surrounding Properties...................................... 2-1

2.4 Physical Setting.................................................................................................. 2-1

3.0 HISTORICAL REVIEW OF SITE AND VICINITY .............................................................. 3-1

3.1 Aerial Photographs ............................................................................................ 3-1

3.2 Topographic Maps............................................................................................. 3-1

3.3 Fire Insurance Maps........................................................................................... 3-1

3.4 City Directories .................................................................................................. 3-1

3.5 Chronological Summary..................................................................................... 3-1

4.0 REGULATORY DATABASE RECORDS REVIEW ............................................................. 4-1

4.1 Standard Environmental Record Sources .......................................................... 4-1

4.2 Additional Environmental Record Sources ........................................................ 4-2

4.3 Findings ............................................................................................................. 4-3

4.3.1 Subject Property ........................................................................................ 4-3

4.3.2 Surrounding Areas ..................................................................................... 4-3

4.3.3 Orphan Sites .............................................................................................. 4-5

5.0 REGULATORY AGENCY RECORDS REVIEW ................................................................. 5-1

5.1 Environmental Liens Search............................................................................... 5-1

5.2 Property Tax Map Search................................................................................... 5-1 7995 of 11211
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5.3 Building Permit Search....................................................................................... 5-1

5.4 Oil and Gas Wells or Pipelines........................................................................... 5-1

5.5 Local Environmental Health Department and/or State Environmental Agency Records.......................................................................................................................... 5-2

5.5.1 San Mateo County Department of Environmental Health ......................... 5-2

5.5.2 Envirostor................................................................................................... 5-2

5.5.3 GeoTracker ................................................................................................ 5-2

5.5.4 Air Quality Management District ............................................................... 5-2

6.0 USER PROVIDED INFORMATION ................................................................................. 6-1

6.1 User Questionnaire ............................................................................................ 6-1

6.2 Phase II Environmental Site Investigation.......................................................... 6-2

7.0 SITE RECONNAISSANCE .............................................................................................. 7-1

7.1 On-Site Interviews.............................................................................................. 7-1

7.2 Storage Tanks .................................................................................................... 7-1

7.3 Hazardous Substances and Petroleum Products ............................................... 7-1

7.4 Solid Waste........................................................................................................ 7-1

7.5 Hydraulic Equipment ......................................................................................... 7-1

7.6 Polychlorinated Biphenyls (PCBs) ...................................................................... 7-2

7.7 Drains................................................................................................................. 7-2

7.8 Wastewater and Septic Systems ........................................................................ 7-2

7.9 Wells .................................................................................................................. 7-2

7.10 Pits and Ponds ................................................................................................... 7-2

7.11 Other Observations ........................................................................................... 7-2

8.0 CONDITIONS OUTSIDE THE SCOPE OF ASTM E 1527-21 ......................................... 8-1

9.0 CONCLUSIONS AND OPINIONS .................................................................................. 9-1

10.0 REFERENCES ............................................................................................................... 10-1

11.0 ENVIRONMENTAL PROFESSIONALS ......................................................................... 11-1

11.1 Signatures of Responsible Environmental Professionals.................................. 11-1

11.2 Qualifications of Responsible Environmental Professionals............................. 11-1 7996 of 11211
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TABLES
Table 3-1: Historical Document Review .................................................................................... 3-2 Table 4-1: Summary of Environmental Database Information................................................... 4-1 Table 4-2: Additional Environmental Record Sources............................................................... 4-3 Table 6-1: User Provided Information ....................................................................................... 6-1

FIGURES
Figure 1 Site Location Map
Figure 2 Site Plan with Historical Surrounding Areas
Figure 3 Phase II Boring Locations

APPENDICES
Appendix A Site Photographs
Appendix B Environmental Data Resources Report
Appendix C Aerial Photographs
Appendix D Topographic Maps
Appendix E Fire Insurance Maps
Appendix F City Directories
Appendix G Environmental Lien and AUL Report
Appendix H Property Tax Map
Appendix I Building Permit Report
Appendix J Regulatory Agency Files
Appendix K User Provided Information
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EXECUTIVE SUMMARY
RMD Environmental Solutions, Inc. (RMD) performed this Phase I Environmental Site Assessment (Phase I ESA) of the property located at 302 East 4th Street and the adjacent parking lot in San Mateo, California, in a mixed-use area. The historical address 401 South B Street is also associated with the Subject Property. The Subject Property is currently developed with a singlestory building that includes commercial space on the ground floor and an adjacent parking lot.

A Phase II Site Environmental Site Assessment (Phase II) was completed by RMD in March and April 2022 and results were considered during completion of this Phase I ESA. The following RECs have been identified with respect to the Subject Property:
• The Presence of Arsenic and Lead in Shallow Soil. The Phase II revealed arsenic and lead in the shallow soil at concentrations above San Francisco Bay Regional Water Quality Control Board (SFBRWQCB) residential screening levels. It is commonplace, regionally, to find urban fill on properties in the vicinity and for such materials to contain elevated concentrations of metals. The soil with elevated lead and arsenic concentrations was collected from borings which are currently capped by a building or hardscape and may remain in place under the current land use. The elevated concentrations of lead in the shallow soils at the Subject Property were neither characterized as California Hazardous Waste nor RCRA waste and they were limited to the upper 5 feet. Should the property be redeveloped by Prometheus, this soil is expected to be removed during excavation associated with the planned subterranean parking garage. • The Presence of Diesel Range Hydrocarbons (TPHd) in on-Site Groundwater at Concentrations Above Regulatory Screening Levels. The Phase II identified TPHd in the subsurface at a concentration of up to 520 µg/L.
• The Presence of VOCs in On-Site Soil Vapor at Concentrations Above Regulatory Screening Levels. VOCs (benzene, chloroform, PCE, and TCE) were reported at concentrations above residential ESLs. PCE was reported at the highest concentration at up to 4,180 µg/L. The distribution and concentrations of VOCs in soil vapor did not suggest a significant on-Site source. The Phase II reported that the PCE appears to be migrating from an upgradient source onto the northwest property corner. Wardrobe Cleaners is located across East 4th Avenue (at 335 East 4th Avenue, see Figure 2) and has reported concentrations of 300 µg/L in groundwater at the corner of East 4th and South Railroad Avenues. The concentrations of VOCs reported in soil vapor are not expected 7998 of 11211
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to drive further investigation, however, mitigation measures such as a vapor barrier may need to be implemented in building design and construction.

De Minimis Conditions
No de minimis conditions were identified during this assessment.

Controlled Recognized Environmental Condition
This assessment has revealed no evidence of a controlled recognized environmental condition.

Historic Recognized Environmental Conditions
This assessment has revealed no evidence of historical recognized environmental conditions in connection with the Subject Property.

Vapor Migration
Based on Phase II conducted by RMD, VOCs (benzene, chloroform, PCE, and TCE) were reported at concentrations above residential ESLs. Benzene concentrations in soil vapor were reported slightly above the residential vapor intrusion ESL of 3.2 µg/m3. Based on the presence of oxygen reported in soil vapor well above 4%, a bioattenuation zone is present. Mitigation measures to address vapor intrusion concerns related to petroleum constituents is unlikely to be required by a regulatory agency.

PCE was reported at the highest concentration at up to 4,180 µg/L. The Phase II reported that the PCE appears to be migrating from an upgradient source onto the northwest property corner.

Wardrobe Cleaners is located across East 4th Avenue (at 335 East 4th Avenue, see Figure 2) and has reported concentrations of 300 µg/L in groundwater at the corner of East 4th and South Railroad Avenues.

Should the site be redeveloped, a vapor barrier may be required beneath future building footprints unless post-excavation sampling confirm that volatile organic compounds are no longer present at concentrations that pose a vapor intrusion risk.

Data Gaps
This assessment has revealed no evidence of data gaps.
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1.0 INTRODUCTION

1.1 Purpose
RMD Environmental Solutions, Inc. (RMD) has prepared this Phase I Environmental Site Assessment (ESA) at the request of the Prometheus Real Estate Group (Prometheus). The purpose of this Phase I ESA is to perform all appropriate inquiries into the previous ownership and uses of the Subject Property consistent with good commercial or customary practice for a possible transaction involving the Subject Property and to permit Prometheus Real Estate Groupto qualify for one of the landowner liability protections as identified by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

1.2 Scope of Services
This project was performed in accordance with the proposal dated March 16, 2022. The scope of services was to perform a Phase I ESA in a manner generally consistent with the American Society for Testing and Materials (ASTM) Standard Designation: E-1527-21 “Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process,” and the United States Environmental Protection Agency’s (USEPA’s) Standards and Practices for All Appropriate Inquiries (AAI), 40 CFR, Part 312.

The scope of services comprising this Phase I ESA was conducted to provide a reasonable level of investigation to identify recognized environmental conditions (RECs). As defined by ASTM standards, the term REC means the presence or likely presence of any hazardous substances or petroleum products in, on, or at a property: (1) due to any release to the environment; (2) under conditions indicative of a release to the environment; or (3) under conditions that pose a material threat of a future release to the environment. The term is not intended to include de minimis conditions that generally do not present a threat to human health or the environment, and that generally would not be the subject of an enforcement action if brought to the attention of the appropriate government agencies. Any historical RECs (HREC) or controlled RECs (CREC) as defined by ASTM E1527-21 that were identified during the assessment are discussed in this report, as applicable.

1.3 Significant Assumptions
RMD has performed the historical and environmental record searches in accordance with current ASTM and industry practice. The data, findings, and conclusions presented in this Phase I ESA are based upon a detailed search, review, and analysis of the documents and interviews as well 8000 of 11211
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as observations made during the site reconnaissance. Conclusions reached regarding the conditions of the Subject Property do not represent a warranty that all areas within the Subject Property are of a similar quality as may be inferred from observable Subject Property conditions and available Subject Property history. As stated in the ASTM standard, no Phase I ESA can wholly eliminate uncertainty regarding the potential for environmental liability in connection with the Subject Property. RMD’s evaluation and analysis are intended to reduce, not eliminate, the potential for conditions that result in liability for the end user of this Phase I ESA.

1.4 Limitations and Exceptions
This report was prepared as a result of a contractual agreement that defined the approach and scope of services to be employed during the course of the investigation. The opinions and conclusions expressed in this study have been based strictly on the results of these contracted services. The scope of this Phase I ESA is intended to aid in the evaluation of RECs. The services provided by RMD should not be construed as a warranty or guarantee that no RECs exist at the Subject Property or that all RECs have been uncovered. No conclusions are stated or implied concerning the suitability of the Subject Property for its eventual use. This document is not intended for purposes other than those expressly set forth herein or for use by parties other than for whom it has been prepared.

As limited by the ASTM Standard for Phase I ESAs and RMD’s scope of work, this project was non-intrusive in nature and did not include any sampling or testing of soils, groundwater, surface water, or other materials. Additionally, unless specifically described in this report, RMD’s scope of work explicitly excluded issues that are outside the scope of ASTM E1527-21 and may constitute a business environmental risk as defined by ASTM.

ASTM Standard Practice E1527-21 recognizes inherent limitations for Phase I ESAs, including, but not limited to:
• Uncertainty Not Eliminated - No ESA can wholly eliminate uncertainty regarding the potential for RECs in connection with a property. Performance of this practice is intended to reduce, but not eliminate, uncertainty regarding the potential for RECs, and this practice recognizes reasonable limits of time and cost. • Not Exhaustive - All Appropriate Inquiry does not mean an exhaustive assessment of a property. There is a point at which the cost of information obtained, or the time required to gather it, outweighs the usefulness of the information and, in fact, may be a material detriment to the orderly completion of transactions.
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• Level of Inquiry Is Variable - Not every property will warrant the same level of assessment.

Consistent with good commercial or customary practice, the appropriate level of environmental site assessment will be guided by the type of property, the expertise and risk tolerance of the user, and the information developed in the course of the inquiry.

In general, the USEPA does not regulate indoor air quality except to the extent that indoor air impacts are caused by releases of hazardous substances into subsurface soil or groundwater (vapor intrusion). ASTM E1527-21 defines “migrate” and “migration” as referring to the movement of hazardous substances or petroleum products in any form, including solid and liquid at the surface or subsurface, and vapor in the subsurface. Vapor migration in the subsurface is described in Guide E2600 – Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transaction; however, nothing in ASTM E1527-21 requires application of the Guide E2600 standard to achieve compliance with all appropriate inquiries.

A Phase I ESA meeting or exceeding this practice and completed less than 180 days prior to the date of acquisition of the property or (for transactions not involving an acquisition) the date of the intended transaction, is presumed to be valid. A Phase I ESA meeting or exceeding this practice and for which the information was collected or updated within one year prior to the date of the intended transaction may be used provided that the following components of the ESA were conducted or updated within 180 days of the date of purchase or the date of the intended transaction:
• interviews with owners, operators, and occupants;
• searches for recorded environmental cleanup liens;
• reviews of federal, tribal, state, and local government records; • visual inspections of the property and of adjoining properties, and; • the declaration by the environmental professional responsible for the assessment or update.

1.5 User Reliance
This report documents the Phase I ESA of the Subject Property performed by RMD in general accordance with ASTM 1527-21 and the USEPA Standards and Practices for All Appropriate Inquiries, 40 CFR 312. The findings, opinions and conclusions of this Phase I ESA are for the confidential and exclusive use of Prometheus Real Estate Group, its affiliates, employees, agents, successors, and assigns. Reliance on this report for any use by parties other than specifically 8002 of 11211
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stated is prohibited without the express written consent of RMD and Prometheus Real Estate Group, and such use is at the sole risk of the user.
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2.0 SITE AND VICINITY DESCRIPTION
The Subject Property is identified as San Mateo County Assessor’s Parcel Numbers (APNs) 034- 179-010 and 034-179-050 and encompasses approximately 0.38 acres. The Subject Property is located at 302 East 4th Street in San Mateo, California, in a mixed-use area. The historical address 401 South B Street is also associated with the Subject Property. The Subject Property is currently developed with a single-story building that includes commercial space on the ground floor and the adjacent parking lot. A Site Location Map is provided as Figure 1 and a Site Plan which is provided as Figure 2.

Photographs that were taken of the Site and immediate area during RMD’s reconnaissance (detailed in Section 7.0) are provided in Appendix A.

2.1 Current Ownership
The parking lot of the Subject Property is currently owned by the City of San Mateo. The commercial building on the Subject Property is currently owned by Mr. Bruce Beiser. Ownership information is provided in the EDR Environmental Lien Search Report, discussed further in Section 5.1.

2.2 Current Site Use and Improvements
The Subject Property is currently developed with a single-story building that includes commercial space on the ground floor and the adjacent parking lot. The building is currently occupied by a restaurant.

2.3 Current Use of Adjoining and Surrounding Properties • NORTHWEST: East 4th Avenue and retail businesses beyond including a dry cleaner; • NORTHEAST: The intersection of East 4th Avenue and South Railroad Avenue and a railroad right-of-way and retail businesses beyond;
• SOUTHEAST: Retail businesses including a salon and spa and vacant storefronts; and, • SOUTHWEST: South B Street and a market beyond.

2.4 Physical Setting
Based on Subject Property observations and United States Geological Survey (USGS) topographic map of the area, the Subject Property is relatively level and is situated at an 8004 of 11211
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elevation of approximately 29 feet above mean sea level (amsl). The Subject Property is relatively flat with a slight regional slope to the northeast.

The Subject Property is located within the Santa Clara Valley Groundwater Basin, within the Coast Ranges Geomorphic province. The regional geology is composed of alluvial fan and fluvial deposits of Holocene age (Brabb et al., 1998). The San Andreas Fault Zone is inferred to be located approximately 3.45 miles to the southwest. The San Jose Fault is inferred to be located approximately 4.15 miles to the southeast.

Information compiled from the California Environmental Protection Agency, State Water Resources Control Board website, http://geotracker.waterboards.ca.gov/ (GeoTracker), indicates first groundwater is approximately 15.60 to 19.05 feet below the top of casing based on data collected in August 2017, from the Unocal Station (Global ID T0608100632) located approximately 0.10 miles to the northeast of the Subject Property. Data collected from that site indicates that groundwater flows to the east. Based on borings advanced on the Subject Property during a Phase II Environmental Site Investigation (Phase II), groundwater was first encountered in the borings between 28 feet bgs and 30 feet bgs and stabilized between 22 and 24 feet bgs.

Shallow sediments beneath the Subject Property are anticipated to be characterized by finegrained soil including clays (Appendix B). Based on borings advanced on the Subject Property during the Phase II, Between approximately 1 feet bgs to 8 feet bgs the soil was characterized primarily by a silt and sandy silt. The soil beneath this horizon is characterized by sand and and/or gravel soil to approximately 16 feet bgs. The soil below 16 feet bgs and the deepest terminal depth of 34 feet bgs is characterized primarily by clay with sand and/or gravel.

The San Mateo Creek is located approximately 0.35 miles to the northwest of the Subject Property. The Subject Property is also approximately 1.1 miles southwest of the San Francisco Bay. RMD’s review of Federal Emergency Management Agency’s (FEMA) Flood Insurance Rate Map (FIRM) indicates that the Subject Property is not located within 100-year flood zone nor the 500-year flood zone (Appendix B). According to the United States Fish and Wildlife Service (FWS) National Wetlands Inventory, no wetlands are located on the Subject Property (Appendix B).
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3.0 HISTORICAL REVIEW OF SITE AND VICINITY
RMD reviewed reasonably ascertainable records documenting the history of the use and/or ownership of the Subject Property and adjoining properties. A chronological summary of historical data found, including but not limited to aerial photographs, historical city directories, and Sanborn fire insurance maps is provided at the end of this section. Sources of information reviewed as part of this assessment are as follows.

3.1 Aerial Photographs
Digital aerial photographs dated 1943, 1946, 1956, 1963, 1968, 1974, 1982, 1993, 1998, 2005, 2009, 2012, and 2016 provided by EDR were reviewed by RMD. Copies of aerial photographs are included in Appendix C.

3.2 Topographic Maps
EDR provided historic topographic maps with coverage of the Subject Property dated 1896, 1899, 1915, 1939, 1947, 1949, 1956, 1968, 1973, 1980, 1993, 1997, 2012, 2015, and 2018.

Copies of the topographic maps are included in Appendix D.

3.3 Fire Insurance Maps
EDR provided fire insurance maps with coverage of the Subject Property dated 1888, 1891, 1897, 1901, 1908, 1920, 1950, 1953, 1956, 1961, and 1969. The Sanborn Map report is included in Appendix E.

3.4 City Directories
EDR provided historic city directories for the years 1956, 1963, 1966, 1969, 1973, 1976, 1981, 1986, 1992, 1995, 2000, 2005, 2010, 2014, and 2017. Historical city directories, listed by street address, are frequently useful in documenting the historical occupancy of properties in urban or otherwise incorporated areas that have a significant history of developed commercial use. A copy of the City Directories Results is included in Appendix F.

3.5 Chronological Summary
A summary of the Subject Property history from the above sources is included below. 8006 of 11211
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Table 3-1: Historical Document Review
Period Source Subject Property Description Adjacent Site Descriptions 1880s 1888
Sanborn
Map
The Subject Property appears to
have storage structures
associated with the adjacent
dwelling.

A railroad right-of-way and turn table
are located east and northeast of the
Subject Property. 4th Avenue is to the
north, B Street is to the west, and
dwellings are located to the south
with 5th Street beyond. The
surrounding areas appear to be
developed with residential structures,
hotels, and boarding houses.
1890s 1891 and
1897
Sanborn
Maps
1896 and
1899
Topographic
Map
There is little change in the
Subject Property from the 1888
Sanborn map.

A lumberyard is located adjacent to
the northwest beyond 4th Avenue.

There is little other change in the
adjacent sites from the 1888 Sanborn
map.
1900s 1901 and
1908
Sanborn
Maps
Storage structures are no longer
on the Subject Property on the
1908 Sanborn Map. Two
structures labeled “Shanty” and a
car storage building are located
in the northeast portion of the
Subject Property.

There is increased development in
the surrounding areas, including a
United Gas & Electric Company
substation and lumberyard to the
northeast beyond Railroad Avenue.
1920s 1920
Sanborn
Map
The western portion of the
Subject Property is developed as
an auto sales and repair business.

A dwelling is present in the
northeast portion of the Subject
Property.

There is increased development in
the surrounding areas, including San
Mateo Garage to the northwest.
1930s 1939
Topographic
Map
Unable to determine any useful
information from the 1939
topographic map.

Unable to determine any useful
information from the 1939
topographic map.
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Table 3-1: Historical Document Review
Period Source Subject Property Description Adjacent Site Descriptions 1940s 1943 and
1946 Aerial
Photographs
1947 and
1949
Topographic
Map
The Subject Property appears to
be undeveloped in the 1940s
aerial photographs
The surrounding areas appear to be
developed for mixed residential and
commercial use. in the 1940s aerial
photographs
1950s 1950 ,1953,
and 1956
Sanborn
Maps
1956 Aerial
Photograph
1956 City
Directory
1956
Topographic
Map
The western portion of the
Subject Property is developed
with an automotive service center
in 1950. The western portion of
the Subject Property is identified
as “S & Paints” on the 1953
Sanborn Map. In 1956, the
structure on western portion of
the Subject Property is identified
as a storefront. The northeastern
portion of the Subject Property is
developed as a parking lot in the
1950s.

Between 1950 and 1956, retail shops
are located immediately adjacent to
the south of the Subject Property. A
garage is located to the northwest at
350 South B Street, Baywood Theater
is located to the north at 345 South B
Street, residences and an auto repair
shop are located to the southwest,
and Southern Pacific Railroad tracks
are located to the east of the Subject
Property in the 1950s Sanborn Maps.

Bamboo Washrite (411 South B
Street), Larry Devlin Kitchens (415
South B Street), Talbot’s Toyland (445
South B Street), Anderson’s Shell
Service Station (446 South B Street),
and San Mateo Launderette (507
South B Street) are listed to the south
in the 1956 city directory. Multiple
cab companies are listed to the north
at 335 East 4th Avenue in the 1956
city directory.
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Table 3-1: Historical Document Review
Period Source Subject Property Description Adjacent Site Descriptions 1960s 1961 and
1969
Sanborn
Maps
1968
Topographic
Map
1963, 1966,
and 1969
City
Directories
1963 and
1968 Aerial
Photographs
There is little change in the
Subject Property from the 1950s
aerial photograph and Sanborn
Maps. The use of the Subject
Property in 1961 is listed as an
office and a “Paint” storefront.