Mountain View City Council
December 17, 2024

Subject: RE: PRA 22-0159 Records Request - APN 160-60-013 Date: Friday, September 23, 2022 at 3:37:45 PM Pacific Daylight Time From: Wong, Melinda@Waterboards
To: Carissa Jackson
A7achments: image001.jpg
Hello Carissa,
Thank you for your follow up email. The San Francisco Bay Regional Water Board received your September 16, 2022 file review request, which seeks records related to the addresses as described below. Based on a thorough search, the San Francisco Bay Water Board does not possess any records responsive to your request.

Other records I found are related to a terminated construcZon stormwater NOI permit coverage, WDID number 43C360294 for the address at 675 E. Middlefield Road, Mountain View, CA., the facility documents, annual reports and a noZce of terminaZon are available at this link: CA Storm water MulZple ApplicaZons and Report Tracking System - Ver 2015.11 Bld: 10.28.2015.8.40.

I would recommend contacZng the local agency, Santa Clara Valley Water District for any further informaZon 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
Email: [email protected]
Fax: (510) 622-2095 direct line for Public Records Act request PRA Request Email: [email protected]
From: Carissa Jackson <[email protected]>
Sent: Friday, September 16, 2022 12:44 PM
To: WB-RB2-PRA-Request <[email protected]> Subject: Public Records Request - APN 160-60-013
EXTERNAL:

Hello,
I am compleZng a Phase I Environmental Site Assessment for the properZes located at 675 and 685 East Middlefield Road in Mountain View (APN# 160-60-013). Please advise if records are available.

Thank you,
Carissa Jackson

CARISSA JACKSON

ADMINISTRATIVE ASSISTANT
1371 OAKLAND BOULEVARD, SUITE 200
WALNUT CREEK, CA 94596
(925) 949-9141
www.rmdes.net [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.

PRR Plant Status
Report Generated 9/19/2022 10:40:43 AM
Facility No.: 24326 Facility Name: JD COM American Technologies Corporation
Legacy Plant No.: 24326 Facility Address: 675 E Middlefield Road Mountain View CA , 94043-4043 Legacy Site No.: B3845
Permit Expiration Date: 1/1/2023 Facility Status: Permitted 1/1/2022 NAICS: Other Activities Related to Real Estate
(531390)
Owning Entity: JD COM American Technologies
Corporation
B152448F24326
Ownership Start Date: 2/1/2019
Miya Zhu
JD COM American Technologies
Corporation
675 E Middlefield Road
Mountain View , CA 94043-4043
Email: [email protected]
Tel: (408) 625-7571
Alt Tel:

Fax:

Current Operator
Contact:

Current Owner
Contact:

Miya Zhu
JD COM American Technologies
Corporation
675 E Middlefield Road
Mountain View , CA 94043-4043
Email: [email protected]
Tel: (408) 625-7571
Alt Tel:

Fax:

PRR Plant Status
Report Generated 9/19/2022 10:40:43 AM
Reported Source Emissions
For Renewal Period 1/1/2022 to 1/1/2023
Annual Average lbs/day
Source Facility Source Description PM Org NOx SO2 CO
TOTALS 0.00 0.00 0.00 0.00 0.00
Historical Facility Information
Facility Status Status Date Legacy Facility No. Facility Name End Date 13845 Hewlett Packard 7/10/2003
15248 VeriSign, Inc 6/16/2011
20585 PRIII Middlefield Rd LLC 2/4/2015
22866 C&W at Symantec 11/1/2017
23996 PREG Middlefield LP 2/1/2019
24326 JD COM American
Technologies Corporation
PRR Plant Status
Report Generated 9/19/2022 10:40:43 AM
Show Permit - Applications By Facility
Facility Number: 24326
Legacy Plant/GDF Number: 24326
Legacy Site Number: B3845
Facility Name: JD COM American Technologies Corporation Facility Address: 675 E Middlefield Road
Mountain View , 94043-4043
Application
No.

Legacy
Plant/GDF No.

Application
Submission Date
Application
Name
Current
Status
Current Status
Date
Application
Engineer
11714
15248 1/28/2005 Diesel
Generator
Canceled 7/27/2005 Roy Lo
4314
13845 3/1/2002 LOE engine(s) Approved 6/4/2002 Carla Jo PRR Plant Status
Report Generated 9/19/2022 10:42:57 AM
Facility No.: 21100 Facility Name: Siemens Medical Solutions USA, Inc Legacy Plant No.: 21100 Facility Address: 685 E Middlefield Road Mountain View CA , 94043-4043 Legacy Site No.: E1100
Permit Expiration Date: 2/1/2023 Facility Status: Permitted 2/1/2022 NAICS: ()
Owning Entity: Siemens Medical Solutions USA, Inc
B145531F21100
Ownership Start Date: 1/1/1976
Gail Street
Siemens Medical Solutions USA, Inc
685 E Middlefield Road
Mountain View , CA 94043-4043
Email: gail.street@siemenshealthineers.com
Tel: (650) 336-3253
Alt Tel:

Fax:

Current Operator
Contact:

Current Owner
Contact:

Gail Street
Siemens Medical Solutions USA, Inc
685 E Middlefield Road
Mountain View , CA 94043-4043
Email: gail.street@siemenshealthineers.com
Tel: (650) 336-3253
Alt Tel:

Fax:

PRR Plant Status
Report Generated 9/19/2022 10:42:57 AM
Reported Source Emissions
For Renewal Period 2/1/2022 to 2/1/2023
Annual Average lbs/day
Source Facility Source Description PM Org NOx SO2 CO
TOTALS 0.01 0.06 0.29 0.00 0.01

FACILITY TOTALS FOR EACH EMITTED TOXIC POLLUTANT
Pollutant Name Emissions lbs/day
Diesel Engine Exhaust Particulate Matter 0.01
Historical Facility Information
Facility Status Status Date Legacy Facility No. Facility Name End Date 21100 Siemens Medical Solutions
USA, Inc
PRR Plant Status
Report Generated 9/19/2022 10:42:57 AM
Show Permit - Applications By Facility
Facility Number: 21100
Legacy Plant/GDF Number: 21100
Legacy Site Number: E1100
Facility Name: Siemens Medical Solutions USA, Inc
Facility Address: 685 E Middlefield Road
Mountain View , 94043-4043
Application
No.

Legacy
Plant/GDF No.

Application
Submission Date
Application Name Current
Status
Current Status
Date
Application
Engineer
24090
21100 1/9/2012 Solvent Cleaning Approved 3/22/2012 Janice Wu

APPENDIX K

USER PROVIDED INFORMATION

ASTM E1527-21 USER QUESTIONNAIRE
Site Name: PREG Middlefield LP
Site Address: 675 and 685 East Middlefield Road
Mountain View, CA
Respondent Name: Michael Ducote
Respondent Title/Company: Director of Development, Prometheus Date: Emailed 9/14/2022
For Landowner Liability Protections (LLPs) offered by the Small Business Liability Relief and Brownfields Revitalization Act of 2001 (the "Brownfields Amendments", 40 CFR Part 312), the user must provide the following information (if available) to the environmental professional.

Failure to provide this information could result in a determination that "all appropriate inquiry" is not complete, and the environmental professional may identify a “data gap” which could impact the Phase I ESA report findings.

Question: Yes No Don’t
Know

1. Environmental Liens
Did a search of recorded land title records (or judicial records where appropriate) identify any environmental liens filed or recorded against the property under federal, tribal, state, or local law? Check the box below as appropriate.

The scope of work for this Phase I Environmental Site
Assessment (ESA) includes a search of recorded environmental liens as an added-scope item (in accordance with ASTM E1527- 21 Section 6.2).

ASTM E1527-13 USER QUESTIONNAIRE

Question: Yes No Don’t
Know

2. Activity and Land Use Limitations (AULs)
Did a search of recorded land title records (or judicial records where appropriate) identify any AULs, such as engineering controls, land use restrictions or institutional controls that are in place at the property and/or have been filed or recorded against the property under federal, tribal, state, or local law? Check the box below as appropriate.

The scope of work for this Phase I ESA includes a search of recorded AULs as an added-scope item (in accordance with ASTM E1527-21 Section 6.2).

Question: Yes No

3. Specialized Knowledge or Experience
Do you have any specialized knowledge or experience related to the property or nearby properties? For example, are you involved in the same line of business as the current or former occupants of the property or an adjoining property so that you would have specialized knowledge of the chemicals and processes used by this type of business?

4. Purchase Price vs. Fair Market Value
Does the purchase price being paid for this property reflect any adjustments from the fair market value of the property? (If you conclude that the value is lower than the fair market price, have you considered whether the lower purchase price is because contamination is known or believed to be present at the property?)

5. Commonly Known or Reasonably Ascertainable Information Are you aware of commonly known or reasonably ascertainable information about the property that would help the environmental professional to identify conditions indicative of releases or threatened releases? ASTM E1527-13 USER QUESTIONNAIRE

Question: Yes No
5a. Do you know the past uses of the property?
5b. Do you know of specific chemicals that are present or were once present at the property?
5c. Do you know of spills or other chemical releases that have taken place at the property?
5d. Do you know of any environmental cleanups that have taken place at the property?

6. Obviousness of the Presence or Likely Presence of Contamination Based on your knowledge and experience related to the property are there any obvious indicators that point to the presence or likely presence of releases at the property?
Please provide explanation for all “yes” answers or attach supporting documents. 675-685 E. Middlefield Road
Mountain View, CA 94043
Formal Planning Application
PL-2022-142
Prometheus Real Estate Group
Developer

PHASE II SITE INVESTIGATION REPORT
DRAFT
Prepared By
RMD Environmental Solutions
1371 OAKLAND BOULEVARD, SUITE 200 – WALNUT CREEK, CA
December 2, 2022
Mr. Michael Ducote
PREG Middlefield, LP

Subject: Phase II Site Investigation Report - DRAFT
675 & 685 East Middlefield Road, Mountain View, CA 94043 Dear Mr. Ducote:

RMD Environmental Solutions, Inc., (RMD) has prepared this Phase II Site Investigation Report (Phase II Report) describing recent investigation activities for the property located at 675 and 685 East Middlefield Road (Site) in Mountain View, California (the Site; Figure 1).

SITE BACKGROUND
The Subject Property consists of one irregularly shaped parcel totaling approximately 10.6 acres on East Middlefield Road between Ferguson Drive to the southeast and the Southern Pacific railroad tracks to the northwest. The Subject Property is identified as Santa Clara County Assessor’s parcel number (APN) 160-60-013. The Subject Property is currently developed with two multi-story office buildings and a surrounding parking lot.

We understand that PREG Middlefield, LP (PREG) intends to remove the existing structures at the Subject Property and redevelop the Site with an approximately 260,000 square foot office building with a multi-story aboveground parking garage on the northern portion of the Site and two multistory residential apartment buildings with two levels of subterranean parking on the southern portion of the Site.

Based on investigations conducted at nearby off-site locations, there is a high likelihood of volatile organic compounds (VOCs) present in subsurface media beneath the Subject Property. Based on known historical agricultural land use, it is possible shallow soils beneath the Subject Property are impacted by pesticides and metals.

SCOPE OF WORK
The Phase II activities were completed in October 2022. The scope of work conducted consisted of a combination of on-Site soil, groundwater, and soil vapor sampling, summarized as follows:

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
• Soil sampling occurred from four borings (SB-1 through SB-4) advanced to between approximately 24 and 28 feet bgs. Data was collected to evaluate shallow soil conditions and to prepare for soil management during redevelopment. • Groundwater sampling from four borings (SB-1 through SB-4) to evaluate potential impacts in groundwater beneath the Site.
• Soil vapor sampling from six soil vapor probes (SVP-1, SVP-2-S, SVP-2-D, SVP-3-S, SVP-3-D, and SVP-4) to evaluate soil vapor concentrations and potential vapor intrusion concerns associated with VOCs.

Drilling activities were conducted by Gregg Drilling, LLC (Gregg), a C-57 licensed contractor, under the oversight of RMD personnel on October 3 and 4, 2022. 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;
• Conducted an underground utility survey to clear the proposed drilling locations of underground utilities and other possible subsurface obstructions.

SOIL BORINGS AND LOGGING
Four soil borings (SB-1 through SB-4) were hand cleared to 5 feet below ground surface (feet bgs) using a hand auger and advanced with a direct-push drill rig to a final depth between approximately 24 and 28 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 VOCs using a handheld photoionization detector (PID).

Between approximately 0.5 feet bgs to between 8 and 11 feet bgs, the soil was characterized primarily by silty sand with various amounts of gravel. Between 8 and 11 feet bgs to 28 feet bgs the soil was characterized primarily as silt or clay with varying amounts of sand and gravel.

Groundwater was first encountered in borings SB-1, SB-2, and SB-4 between approximately

23.5 and 24.5 feet bgs and approximately 18.5 feet bgs at boring SB-3.

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

No significant odors or elevated PID readings were observed during drilling of any of the borings.

The soil types and PID readings are recorded on the boring logs included as Appendix A.

SOIL SAMPLING
Soil samples were collected at each boring location during hand augering and direct-push drilling activities. At each boring, soil samples were collected at approximately 1, 5, 10, and 15 feet bgs. Soil 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.

The soil samples were analyzed as follows:
• Soil samples collected from 1 foot bgs were analyzed for California Administrative Manual (CAM)-17 Metals using USEPA Method 6020, semi-volatile organic compounds (SVOCs) using USEPA Method 8270, and organochlorine pesticides (OCPs) using USEPA Method 8081;
• Soil samples collected from 5 feet bgs were analyzed for CAM-17 Metals using USEPA Method 6020; SVOCs using USEPA Method 8270; OCPs using USEPA Method 8081; VOCs using USEPA Method 8260B; and total petroleum hydrocarbons (TPH) as gasoline (TPHg), diesel (TPHd), and motor oil (TPHmo) using USEPA Method 8015; and • Soil samples collected from 10 feet bgs and 15 feet bgs were analyzed for VOCs using USEPA Method 8260B and TPHg, TPHd, and TPHmo using USEPA Method 8015.

GRAB GROUNDWATER SAMPLING
Upon reaching target depth at each boring, temporary PVC casing with 10 feet of 0.010-inch machined-slot screen was installed to facilitate grab groundwater sample collection.

Grab groundwater samples were collected using a new disposal bailer and decanted directly into laboratory-supplied sample containers. Samples were labeled, placed in a chilled cooler, and transported under standard COC protocol to Pace for analysis. The grab groundwater samples were analyzed for VOCs using USEPA Method 8260B and TPHg, TPHd, and TPHmo using USEPA Method 8015.

Following groundwater sample collection, the two northern borings (SB-1 and SB-4) were backfilled to approximately 5.5 feet bgs and the southern borings (SB-2 and SB-3) were backfilled to approximately 15.5 and 14.5 feet bgs, respectively, with neat cement grout to allow for installation of soil vapor probes at each location.

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

SOIL VAPOR PROBE INSTALLATION
In the northern portion of the Site, soil vapor probes SVP-1 and SVP-4 were installed at approximately 5 feet bgs. In the southern portion of the Site, dual-nested soil vapor probe SVP-2 was installed at approximately 5 feet bgs (SVP-2-S) and 15 feet bgs (SVP-2-D), and SVP-3 was installed at approximately 5 feet bgs (SVP-3-S) and 14 feet bgs (SVP-3-D) based on observed permeable soil intervals. 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 1/4-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 the shallow probe above or near ground surface. A traffic-rated flush-mount vault box was installed at the surface of each location for protection. Soil vapor probe construction details are presented in Table 1.

SOIL VAPOR PROBE SAMPLING
Soil vapor probes were sampled on October 6, 2022. Each sample was collected 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 15 to 18 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 fixed gases, including the leak check compound helium, using modified American Society for Testing and Materials (ASTM) Method D-1946. Field data sheets are provided in Appendix B.

INVESTIGATION RESULTS
SOIL
Soil analytical results were compared to the SFBRWQCB Tier 1 Environmental Screening Levels (ESLs)2 and Direct Exposure Human Health Risk Levels for Residential Shallow Soil Exposure 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. 2 San Francisco Bay Regional Water Quality Control Board. 2009. Tier 1 Environmental Screening Levels. 2019 Interim Final Rev. 2.

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
(Residential ESLs) and Commercial Shallow Soil Exposure (Commercial ESLs). ESL values are included on Tables 2 through 5. Constituents reported above Tier 1 ESLs (the most stringent value considering all screening levels) are summarized as follows:
• TPHd was detected above the Tier 1 ESL and Residential ESL of 260 milligrams per kilogram (mg/kg) in one sample analyzed at a concentration of 438 mg/kg in the sample collected at 15 feet bgs at boring SB-2. RMD notes the Tier 1 ESL for TPHd is based on the Residential ESL which would generally not apply for soil greater than five feet bgs where exposure is unlikely to occur.
• Methylene chloride was detected above the Tier 1 ESL of 0.12 mg/kg in each of the 12 samples analyzed at concentrations ranging from 0.250 mg/kg to 0.965 mg/kg.

Methylene chloride is a common laboratory contaminant and cross contamination is suspected. Furthermore, the Tier 1 ESL for methylene chloride is based on leaching to groundwater. Methylene chloride was not reported in groundwater above laboratory detection limits.
• 4,4-dichlorodiphenyltrichloroethane (4,4-DDT) was detected above the Tier 1 ESL of

0.0011 mg/kg in one sample analyzed at a concentration of 0.0842 mg/kg in the sample collected at 1 foot bgs at boring SB-1.
• Dieldrin was detected above the Tier 1 ESL of 0.000046 mg/kg and the Residential ESL of 0.037 mg/kg in two samples analyzed at concentrations of 0.0515 mg/kg and

0.357 mg/kg in samples collected at 1 foot bgs at borings SB-4 and SB-1, respectively. • Toxaphene was detected above the Tier 1 ESL and Residential ESL of 0.51 mg/kg in one sample analyzed at a concentration of 0.710 mg/kg in the sample collected at 1 foot bgs at boring SB-1.
• No other VOCs, SVOCs, or OCPs were reported above their respective ESLs in any of the soil samples analyzed.

Metal concentrations are presented in Table 3. Metals with reported concentrations above Tier 1 ESLs, Residential ESLs, Commercial ESLs, and/or Bay Area Background Levels (Background Levels)3 are summarized as follows:
• Arsenic was detected above the Tier 1 ESL and Residential ESL of 0.067 mg/kg in each of the eight samples analyzed at concentrations ranging from 2.48 mg/kg to 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).

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

8.53 mg/kg. However, arsenic concentrations in all samples were below the Background Level of 11 mg/kg.
• Barium was detected above the Tier 1 ESL of 390 mg/kg and Background Level of 410 mg/kg at a concentration of 498 mg/kg in one of the eight samples analyzed. • Chromium was not detected above the Tier 1 ESL of 160 mg/kg or the Bay Area Background Level of 120 mg/kg in any of the samples analyzed. Chromium was detected above the concentration to require additional Soluble Threshold Limit Concentration (STLC) analysis for off-site disposal characterization considerations.

Seven of the eight samples exceed the 50 mg/kg STLC trigger at concentrations ranging from 58.8 mg/kg to 86.3 mg/kg. STLC analyses for chromium were conducted as described below.
• Nickel was detected above the Tier 1 ESL of 86 mg/kg in two of the eight samples analyzed at concentrations of 88.9 mg/kg (SB-2-1) and 89.7 mg/kg (SB-3-5), however concentrations were below the Background Level of 272 mg/kg. • Vanadium was detected above the Tier 1 ESL of 18 mg/kg and below the Background Level of 90 mg/kg in seven of the eight samples analyzed, ranging from 57.1 mg/kg to 81.0 mg/kg. The sample collected from boring SB-3 at 5 feet bgs reported vanadium at 92.6 mg/kg which is slightly above the Background Level and Tier 1 ESL.

Vanadium concentrations were below the Residential ESL of 390 mg/kg. • No additional metals were detected above the Tier 1 ESLs, Residential ESLs, Commercial ESL, or Background Levels in the analyzed soil samples.

Several soil samples exceeded waste classification threshold values for chromium, requiring further analysis by California’s Soluble Threshold Limit Concentration (STLC). Sample SB-1-1, a composite of samples SB-2-1 and SB-2-5, a composite of samples SB-3-1 and SB-3-5, and a composite of samples SB-4-1 and SB-4-5 were analyzed for STLC for chromium. Results of the STLC analysis indicate the soil is not characterized as California Hazardous (Non-RCRA) or RCRA hazardous material. STLC results are included on Table 3. Laboratory analytical reports are included in Appendix C.

GROUNDWATER
Table 6 and Figure 3 summarize the grab groundwater analytical results. TPH and VOC concentrations were compared to SFBRWQCB Tier 1 ESLs and Vapor Intrusion ESLs for Residential Land Use (Residential VI ESLs). A summary of the detections is as follows:

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
• TPHd was detected above the Tier 1 ESL of 100 micrograms per liter (µg/L) in the sample collected at boring SB-2 at a concentration of 1,020 µg/L. • Trichloroethene (TCE) was detected above the Tier 1 ESL and Residential VI ESL of

1.2 µg/L in the samples collected at borings SB-2 and SB-4 at concentrations of 2.07 µg/L and 2.29 µg/L, respectively.
• No other VOCs were reported above their respective ESLs in any of the groundwater samples collected.

The laboratory analytical reports are included in Appendix C.

SOIL VAPOR
Tables 7, 8, and 9 and Figure 4 summarize the soil vapor analytical results. VOC constituents were compared to SFBRWQCB VI ESLs for Residential and Commercial Land Use (Residential and Commercial VI ESLs). A summary of the detections is as follows:
• Benzene was detected above the Residential Soil VI ESL of 3.2 micrograms per cubic meter (µg/m3) in two of the six soil vapor samples at concentrations of 3.55 µg/m3 and

37.1 µg/m3 in samples SVP-4 and SVP-3-D, respectively. The detection of 37.1 µg/m3 in sample SVP-3-D was above the commercial ESL of 14 µg/m3.

Other VOCs were detected above laboratory reporting limits but were either below the Residential and Commercial VI ESLs or there is no established ESL and are not considered drivers for future investigation or remediation. 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 VOCs by USEPA Method TO-15. Helium was not detected above laboratory reporting limits in any of the soil vapor probe samples collected, except 3.80% in the sample collected at probe SVP-3-S (Table 9). To evaluate the potential leak at the soil vapor probes, a ratio of the concentration of helium measured in the samples to the average concentration of helium under the shroud during sample collection was estimated. The helium leak ratio was 23% at probe SVP-3-S and not calculated at the other probes since helium was not detected above the RL. A leak threshold of 5% is considered acceptable when a quantitative leak check compound is used under the sampling shroud (CalEPA, 2015). The estimated leak ratios are below the threshold, except at SVP-3-S, therefore, the TO-15 data were considered valid and representative. The leak ratio of 23% at SVP-3-S indicates potential dilution from atmospheric air during sampling Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
and the reported concentrations may be biased low. Considering the overall dataset, this does not impact RMD’s general conclusions summarized at the end of this document. A summary of helium data is shown on Table 9. 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 a properly labeled 55-gallon drum. Following waste characterization profiling, IDW will be disposed of in accordance with applicable laws and regulations.

DISCUSSION OF KEY RESULTS AND CONCLUSIONS
OCPs (dieldrin and toxaphene) were detected in shallow soil beneath the Site at concentrations that are above the residential ESLs. The presence of these constituents will require adherence to a soil management plan during project construction. Shallow soil with elevated OCPs should be excavated or capped with hardscape.

Except for methylene chloride, VOCs were not reported in soil above Tier 1 ESLs. The reported methylene chloride concentrations are considered suspect and are not expected to trigger further action. Neither TPHg, TPHd4, TPHmo, or SVOCs were reported above applicable ESLs.

Barium and vanadium were detected in soil at concentrations above the Tier 1 ESLs and background level however exceedances are not expected to drive further action. Tier 1 ESLs for these two constituents are based on terrestrial habitat, which is not applicable for an urban development that is primarily capped with buildings and hardscape. Results of the STLC analysis for chromium indicate the soil is not characterized as California Hazardous or RCRA hazardous material. No metals (including barium and vanadium) exceeded residential ESLs.

TCE was detected in groundwater beneath the Site at concentrations up to 2.29 ug/L which is slightly above the Tier 1 ESL based on residential vapor intrusion concerns. TCE was not reported in soil vapor from the same locations. TPHd was reported in boring SB-2 at 1,020 ug/L, above the Tier I ESL of 100 ug/L based on odor/nuisance. The Tier 1 ESL is based on odor nuisance levels for drinking water, and this standard is not relevant for project construction or operation because the groundwater will not be used for potable water purposes. No constituents were reported in groundwater that exceeded maximum contaminant levels for drinking water (MCLs) or are at concentrations that are considered a significant risk. If dewatering 4 The Tier 1 ESL does not apply at the depth where TPHd was reported at 438 mg/kg in boring SB-2.

Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.
is to occur during construction activities, groundwater treatment using carbon filters may be required prior to discharge pursuant to standard practices under a sewer discharge permit.

In soil vapor, benzene was the only reported constituent that exceeded Tier 1 ESLs (which are based on vapor intrusion concerns for residential land use). The highest concentration in benzene was reported at 37.1 ug/m3 compared to its ESL of 3.2 ug/m3. This concentration does not require mitigation for the proposed development of at least one level of parking garage.

In summary, based on the sampling conducted:
• Soil exported off-Site during Site grading and excavation for subterranean parking is generally expected to meet acceptable criteria for non-hazardous waste characterization. • OCPs are present in shallow soil that exceed applicable ESLs. These soils should be excavated and disposed of in accordance with applicable laws and regulations or capped with hardscape. If capping is selected, a land use covenant (LUC) and associated site management plan may be required by a regulatory agency.

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 Doug Whichard
Principal Engineer Senior Scientist
Benjamin McVeigh, P.G.

Senior Geologist
Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

ATTACHMENTS:

Figure 1 – Site Location Map
Figure 2 – Site Plan
Figure 3 – TPH and TCE Concentrations in Groundwater
Figure 4 – TPHg and VOC 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 Soil Analytical Results – SVOCs
Table 5 – Summary of Soil Analytical Results – Organochlorine Pesticides Table 6 – Summary of Grab Groundwater Analytical Results – TPHg and VOCs Table 7 – Summary of Soil Vapor Analytical Results – TPHg and VOCs Table 8 – Summary of Maximum Soil Vapor Concentrations – Other VOCs Table 9 – Summary of Soil Vapor Analytical Results – Fixed Gases Appendix A – Boring Logs
Appendix B – Field Data Sheets
Appendix C – Laboratory Analytical Reports
Mr. Ducote
December 2, 2022

RMD ENVIRONMENTAL SOLUTIONS, INC.

LIMITATIONS
This document was prepared for the exclusive use of the Client 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 Client 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.

FIGURES
PROJECT NO. DATE DRAWN BY: APP. BY: FIGURE
675 & 685 EAST MIDDLEFIELD ROAD

MOUNTAIN VIEW, CALIFORNIA N
01-PRO-015 10/2022 EC DW SCALE: 1" = 2000'
0 2000 4000
1 SITE LOCATION MAP
Map Source:

USGS 7.5' Quadrangles, Mountain View/Cupertino, California, 1980 Site Location And Site Plan Middlefield Road - 10/12/2022 SITE

LOCATION
SB-4/SVP-4 SB-3/SVP-3 SB-2/SVP-2 SB-1/SVP-1 LOGUE AVENUE EAST MIDDLEFIELD ROAD FERGUSON DRIVE SOUTHERN PACIFIC RAILROAD 600 EAST MIDDLEFIELD ROAD 675 EAST MIDDLEFIELD ROAD 685 EAST MIDDLEFIELD ROAD PROJECT NO. DATE DRAWN BY: APP. BY: FIGURE 675 & 685 EAST MIDDLEFIELD ROAD MOUNTAIN VIEW, CALIFORNIA N 01-PRO-015 10/2022 EC SCALE: 1" = 100' 0 50 100 2 SITE PLAN DW LEGEND Approximate site boundary Soil, grab groundwater, and soil vapor probe location Site Location And Site Plan Middlefield Road - 10/12/2022 Base map: Google Earth, 2021 SB-1
SB-4/SVP-4 SB-3/SVP-3 SB-2/SVP-2 SB-1/SVP-1LOGUE AVENUE EAST MIDDLEFIELD ROAD FERGUSON DRIVE SOUTHERN PACIFIC RAILROAD 600 EAST MIDDLEFIELD ROAD 675 EAST MIDDLEFIELD ROAD 685 EAST MIDDLEFIELD ROAD PROJECT NO. DATE DRAWN BY: APP. BY: FIGURE 675 & 685 EAST MIDDLEFIELD ROAD MOUNTAIN VIEW, CALIFORNIA N 01-PRO-015 10/2022 EC SCALE: 1" = 100' 0 50 100 3 TPH AND TCE CONCENTRATIONS IN GROUNDWATER DW LEGEND Approximate site boundary Soil, grab groundwater, and soil vapor probe location Total Petroleum Hydrocarbons as diesel Total Petroleum Hydrocarbons as motor oil Trichloroethene Not detected above noted laboratory reporting limit &RQFHQWUDWLRQLQPLFURJUDPVSHUOLWHU —J/
The associated batch QC was outside the established quality control range for accuracy Site Location And Site Plan Middlefield Road - 10/19/2022 Base map: Google Earth, 2021 SB-1 TPHd TPHmo TCE ND<0.5 160J Note: 1. Yellow shaded values exceed the Tier I Environmental Screening Level (ESL) SB-1 TPHd ND<100 TPHmo ND<100 TCE ND<0.500 J4 SB-2 TPHd 1,020 TPHmo 160 TCE 2.07 SB-3 TPHd ND<133 TPHmo ND<133 TCE 0.767 SB-4 TPHd ND<133 TPHmo ND<133 TCE 2.29 SB-4/SVP-4 SB-3/SVP-3 SB-2/SVP-2 SB-1/SVP-1LOGUE AVENUE EAST MIDDLEFIELD ROAD FERGUSON DRIVE SOUTHERN PACIFIC RAILROAD 600 EAST MIDDLEFIELD ROAD 675 EAST MIDDLEFIELD ROAD 685 EAST MIDDLEFIELD ROAD PROJECT NO. DATE DRAWN BY: APP. BY: FIGURE 675 & 685 EAST MIDDLEFIELD ROAD MOUNTAIN VIEW, CALIFORNIA N 01-PRO-015 10/2022 EC SCALE: 1" = 100' 0 50 100 4 TPHg AND VOC CONCENTRATIONS IN SOIL VAPOR DW LEGEND Approximate site boundary Soil, grab groundwater, and soil vapor probe location Total Petroleum Hydrocarbons as gasolinie Tetrachloroethene Trichloroethene Not detected above noted laboratory reporting limit Concentration in micrograms per FXELFPHWHU —JPñ

Site Location And Site Plan Middlefield Road - 10/19/2022 Base map: Google Earth, 2021 SB-1 TPHg PCE TCE ND<1.07 1.88 Note: 1. Blue shaded value exceeds residential Environmental Screening Level (ESL) 2. Yellow shaded value exceed the residential and commercial ESL SVP-1 TPHg ND<826 Benzene 1.04 PCE 2.89 TCE ND<1.07 SVP-2S SVP-2D TPHg ND<826 5,080 Benzene 2.26 3.10 PCE ND<1.36 ND<1.36 TCE ND<1.07 2.05 SVP-4 TPHg ND<826 Benzene 3.55 PCE ND<1.36 TCE ND<1.07 SVP-3S SVP-3D TPHg ND<826 4,790 Benzene 1.88 37.1 PCE ND<1.36 ND<1.36 TCE ND<1.07 ND<1.07 TABLES
Table 1
Soil Vapor Probe Construction Details
675 and 685 East Middlefield Road
Mountain View, 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 10/3/2022 28 0.25 5 1 - 4.5 4.5 - 5.5
SVP-2-S 10/3/2022 0.25 5 1 - 4.5 4.5 - 5.5
SVP-2-D 10/3/2022 0.25 15 5.5 - 14.5 14.5 - 15.5
SVP-3-S 10/4/2022 0.25 5 1 - 4.5 4.5 - 5.5
SVP-3-D 10/4/2022 0.25 14 5.5 - 13.5 13.5 - 14.5
SVP-4 10/4/2022 28 0.25 5 1 - 4.5 4 - 5
Notes:
bgs = below ground surface.
28 24
Table 2
Summary of Soil Analytical Results - TPH and VOCs
675 and 685 East Middlefield Road
Mountain View, California

Sample
Depth TPHg TPHd TPHmo Benzene Toluene Ethylbenzene Total Xylenes Naphthalene PCE TCE cis-1,2-DCE VinylChloride Methylene
Chloride 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 1.9 Varies 2,000 1,200 180,000 1.4 5,300 26 2,500 17 2.7 6.1 85 0.2 25 Varies 100 260 1,600 0.025 3.2 0.43 2.1 0.040 0.08 0.085 0.19 0.0015 0.12 Varies 5 ND <2.80 ND <4.20 67.3 ND <0.00112 0.00838 ND <0.00280 ND <0.00729 ND <0.0141 ND <0.00280 ND <0.00112 ND <0.00280 ND <0.00280 0.457 ND 10 ND <3.85 ND <5.03 ND <5.03 ND <0.00154 0.00919 ND <0.00385 ND <0.0100 ND <0.0193 ND <0.00385 ND <0.00154 ND <0.00385 ND <0.00385 0.655 ND 15 ND <4.28 ND <5.27 ND <5.27 ND <0.00171 ND <0.00856 ND <0.00428 ND <0.0111 ND <0.0214 ND <0.00428 ND <0.00171 ND <0.00428 ND <0.00428 0.250 ND 5 ND <4.21 ND <4.75 ND <4.75 ND <0.00168 0.0113 ND <0.00421 ND <0.0109 ND <0.0211 ND <0.00421 ND <0.00168 ND <0.00421 ND <0.00421 0.504 ND 10 ND <3.50 ND <4.75 ND <4.75 ND <0.00140 ND <0.00700 ND <0.00350 ND <0.00909 ND <0.0175 ND <0.00350 ND <0.00140 ND <0.00350 ND <0.00350 0.452 ND 15 ND <3.78 438 70.4 ND <0.00151 0.00993 ND <0.00378 ND <0.00984 ND <0.0189 ND <0.00378 ND <0.00151 ND <0.00378 ND <0.00378 0.444 P-isopropyltoluene=0.0110 5 ND <2.86 ND <21.4 133.6 ND <0.00115 0.0109 ND <0.00286 ND <0.00744 ND <0.0143 ND <0.00286 ND <0.00115 ND <0.00286 ND <0.00286 0.428 ND 10 ND <3.37 ND <4.64 ND <4.64 ND <0.00135 0.0103 ND <0.00337 ND <0.00875 ND <0.0168 ND <0.00337 ND <0.00135 ND <0.00337 ND <0.00337 0.254 ND 15 ND <3.41 ND <4.64 ND <4.64 ND <0.00136 0.0133 ND <0.00341 ND <0.00886 ND <0.0170 ND <0.00341 ND <0.00136 ND <0.00341 ND <0.00341 0.503 ND 5 ND <2.92 ND <4.32 22.2 ND <0.00117 0.00852 ND <0.00292 ND <0.00758 ND <0.0146 ND <0.00292 ND <0.00117 ND <0.00292 ND <0.00292 0.502 ND 10 ND <3.92 ND <5.01 ND <5.01 ND <0.00157 0.0128 ND <0.00392 ND <0.0102 ND <0.0196 ND <0.00392 ND <0.00157 ND <0.00392 ND <0.00392 0.965 ND 15 ND <3.69 ND <4.84 ND <4.84 ND <0.00148 0.00806 ND <0.00369 ND <0.00959 ND <0.0184 ND <0.00369 ND <0.00148 ND <0.00369 ND <0.00369 0.497 ND Notes:

Samples analyzed using USEPA Method 8260B.

Yellow shaded value exceeds the Tier 1 ESL.

Gray shaded value indicates the laboratory reporting limit is greater than the Tier 1 ESL.

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

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2).

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

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level.

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

J = Estimated value.

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

T8 = Sample received past/too close to holding time expiration.

ND = Not detected above laboratory reporting limit.

ND <0.010 = Not detected above the noted laboratory reporting limit. bgs = Below ground surface.
mg/Kg = Milligrams per kilogram.

TPHg = Total Petroleum Hydrocarbons Gasoline range (C5-C12).

TPHd = Total Petroleum Hydrocarbons Diesel range (C12-C22).

TPHmo = Total Petroleum Hydrocarbons Motor Oil range (C22-C40).

VOCs = Volatile Organic Compounds.

PCE = Tetrachloroethene.

TCE = Trichloroethene.

DCE = Dichloroethene.

SB-2 10/3/2022
SB-4 10/4/2022
SB-3 10/4/2022
SB-1 10/3/2022
Boring ID Date
SFBRWQCB Residential ESLs Note 1
SFBRWQCB Commercial ESLs Note 2
Tier 1 ESLs Note 3
Table 3
Summary of Soil Analytical Results - Metals
675 and 685 East Middlefield Road
Mountain View, California

Sample
Depth Antimony Arsenic Barium Chromium Chromium - STLC Extraction Cobalt Copper Lead Mercury Molybdenum Nickel Selenium Silver Thallium Vanadium Note 6 Zinc (feet bgs) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (µg/L) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) 11 0.067 15,000 -- -- 23 3,100 80 13 390 820 390 390 0.78 390 23,000 160 0.31 220,000 -- -- 350 47,000 320 190 5,800 11,000 5,800 5,800 12 5,800 350,000 11 0.067 390 160 Note 5 -- 23 180 32 13 6.9 86 2.4 25 0.78 18 340 <6.0 11 Note 4 410 120 -- 25 63 24 0.42 4.8 272 4.9 2.9 10 90 140 150 50 1,000 50 -- 800 250 50 2 3,500 200 10 50 70 240 2,500 -- 100 2,000 100 -- -- -- 100 4 -- -- 20 100 -- -- --
-- -- -- -- 5,000 -- -- -- -- -- -- -- -- -- -- --
1 ND <3.85 8.53 261 58.8 416 12.8 28.1 11.6 0.0839 ND <3.21 63.6 ND <3.21 ND < 0.642 ND < 2.57 57.1 66.5 5 ND <3.15 J6 2.48 106 49.2 -- 12.1 26.4 J6 4.77 0.116 ND <2.63 53.3 ND <2.63 ND <0.525 ND <2.10 60.1 44.0 J6 1 ND <3.28 4.17 181 83.5 -- 18.2 37.3 7.61 0.165 ND <2.73 88.9 ND <2.73 ND <0.547 ND <2.19 81.0 63.6 5 ND <3.18 4.23 108 70.1 -- 13.6 28.2 5.66 0.111 ND <2.65 75.8 ND <2.65 ND <0.530 ND <2.12 68.7 47.9 COMP -- -- -- -- 134 -- -- -- -- -- -- -- -- -- -- --
1 ND <3.13 3.33 278 63.5 -- 12.6 25.9 4.91 0.107 ND <2.61 70.4 ND <2.61 ND <0.522 ND <2.09 60.9 45.0 5 ND <3.21 5.28 246 86.3 -- 18.9 36.5 8.03 0.0745 ND <2.68 89.7 ND <2.68 ND <0.536 ND <2.14 92.6 70.0 COMP -- -- -- -- 145 -- -- -- -- -- -- -- -- -- -- --
1 ND <3.23 3.82 498 64.3 -- 13.8 29.2 6.01 0.0779 J5 O1 ND <2.69 73.4 ND <2.69 ND <0.539 ND <2.15 62.9 54.6 5 ND <3.24 3.54 136 63.6 -- 14.5 25.6 5.44 0.0706 ND <2.70 85.5 ND <2.70 ND <0.540 ND <2.16 59.2 47.4 COMP -- -- -- -- 141 -- -- -- -- -- -- -- -- -- -- --
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. -- = No value established, Not analyzed.

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

Values shown in blue font exceed the threshold which triggers TCLP analysis for waste characterization. mg/Kg = Milligrams per kilogram.

Note 1 SFBRWQCB, Direct Exposure Human Health Risk Levels for Residential Shallow Soil Exposure, 2019 (Rev. 2). µg/L = micrograms per liter.

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2). STLC = Soluble Threshold Limit Concentration.

Note 3 SFRWQCB Tier 1 Environmental Screening Levels. 2019 Interim Final Rev. 2. TCLP = Toxicity Characteristic Leaching Procedure.

J = Estimated value.

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).

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.

SB-2-COMP = Laboratory composite of samples SB-2-1 and SB-2-5.

SB-3-COMP = Laboratory composite of samples SB-3-1 and SB-3-5.

SB-4-COMP = Laboratory composite of samples SB-4-1 and SB-4-5.

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.

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

Bay Area Background Metals in Soil Note 4
Boring ID Date
SFBRWQCB Residential ESL Note 1
SFBRWQCB Commercial ESL Note 2
Tier 1 ESLs Note 3
Threshold to Require STLC Analysis
Threshold to Require TCLP Analysis
STLC/TCLP Non-Hazardous Classification Limit
SB-1 10/3/2022
Note 4 Lawrence Berkeley National Laboratory, Analysis of Background Distributions of Metals in Soil at Lawrence Berkeley National Laboratory, Table 5. Revised April SB-2 10/3/2022
SB-3 10/4/2022
SB-4 10/4/2022
Table 4
Summary of Soil Analytical Results - SVOCs
675 and 685 East Middlefield Road
Mountain View, California

Sample
Depth Anthracene Benzo (a) anthracene
Benzo (b)
fluoranthene
Benzo (k)
fluoranthene
Benzo (g,h,i)
perylene
Benzo (a)
pyrene
Bis (2-ethylhexyl)
Phthalate Chrysene Fluoranthene Indeno (1,2,3-cd) pyrene Naphthalene Phenanthrene Phenol Pyrene Other SVOCs
(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) (mg/Kg) 18,000 1.1 1.1 11 -- 0.11 39 110 2,400 1.1 3.8 -- 23,000 1,800 23,000 20 21 210 -- 2.1 160 2,100 30,000 21 17 -- 350,000 23,000

1.9 0.63 1.1 2.8 2.5 0.11 0.8 2.2 0.69 0.48 0.042 7.8 0.16 45 1 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.0855 ND <0.855 ND <0.0855 ND 5 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.0350 ND <0.350 ND <0.0350 ND 1 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.0728 ND <0.728 ND <0.0728 ND 5 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.0395 ND <0.395 ND <0.0395 ND 1 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.0696 ND <0.696 ND <0.0696 ND 5 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.0713 ND <0.713 ND <0.0713 ND 1 ND <0.359 ND <0.359 ND <0.359 ND <0.359 ND <0.359 ND <0.359 ND <3.59 ND <0.359 ND <0.359 ND <0.359 ND <0.359 ND <0.359 ND <3.59 ND <0.359 ND 5 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.0719 ND <0.719 ND <0.0719 ND Notes:

Samples analyzed using USEPA Method 8270.

Yellow shaded value exceeds the Tier 1 ESL.

Gray shaded value indicates laboratory reporting limit is greater than the Tier 1 ESL.

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

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2).

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

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level.

SVOCs = Semi-Volatile Organic Compounds.
-- = No value established.

ND = Not detected above laboratory reporting limit.

ND <0.010 = Not detected above the noted laboratory reporting limit. bgs = Below ground surface.
mg/Kg = Milligrams per kilogram.

Varies
SB-2 10/3/2022
SB-3 10/4/2022
SB-4 10/4/2022
SB-1 10/3/2022
Boring ID Date
SFBRWQCB Residential ESLs Note 1
SFBRWQCB Commercial ESLs Note 2
Tier 1 ESLs Note 3
Table 5
Summary of Soil Analytical Results - Organochlorine Pesticides 675 and 685 East Middlefield Road
Mountain View, California

Sample
Depth Alpha BHC Beta BHC Delta BHC Gamma BHC 4,4-DDD 4,4-DDE 4,4-DDT Dieldrin Toxaphene Other OCPs (feet bgs) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) (mg/Kg) -- -- -- -- 2.7 1.8 1.9 0.037 0.51
-- -- -- -- 12 8.3 8.5 0.16 2.2
-- -- -- -- 2.7 0.33 0.0011 0.00046 0.51
1 ND <0.0257 ND <0.0257 0.0687 ND <0.0257 ND <0.0257 0.191 P 0.0842 P 0.357 0.710 P ND 5 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.0210 ND <0.420 ND 1 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.0219 ND <0.438 ND 5 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.0238 ND <0.475 ND 1 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.0209 ND <0.418 ND 5 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.0214 ND <0.428 ND 1 ND <0.0215 ND <0.0215 ND <0.0215 ND <0.0215 ND <0.0215 0.0754 P ND <0.0215 0.0515 ND <0.431 ND 5 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.0216 ND <0.432 ND Notes:

Samples analyzed using USEPA Method 8081.

Italicized and emboldened values exceed the Residential ESL.

Yellow shaded value exceeds the Tier 1 ESL.

Gray shaded value indicates laboratory reporting limit is greater than the Tier 1 ESL.

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

Note 2 SFBRWQCB, Direct Exposure Human Health Risk Levels for Commercial/Industrial Shallow Soil Exposure, 2019 (Rev. 2).

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

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level. P = RPD between the primary and confirmatory analysis exceeded 40%.

OCPs = Organochlorine Pesticides. -- = No value established.

BHC = Benzene Hexachloride. ND = Not detected above laboratory reporting limit.

DDD = Dichlorodiphenyldichloroethane. ND <0.010 = Not detected above the noted laboratory reporting limit.

DDE = Dichlorodiphenyldichloroethylene. bgs = Below ground surface.

DDT = Dichlorodiphenyltrichloroethane. mg/Kg = Milligrams per kilogram.

SB-4 10/4/2022
Boring ID Date
SFBRWQCB Residential ESLs Note 1
SFBRWQCB Commercial ESLs Note 2
Tier 1 ESLs Note 3
SB-1 10/3/2022
Varies
SB-2 10/3/2022
SB-3 10/4/2022
Table 6
Summary of Grab Groundwater Analytical Results - TPH and VOCs 675 and 685 East Middlefield Road
Mountain View, California

Sample Interval TPHg TPHdNote 3 TPHmoNote 4 Benzene Toluene Ethylbenzene Total Xylenes Naphthalene MTBE PCE TCE cis-1,2-DCE Vinyl Chloride Chloroform 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) NV NV NV 1.8 4,900 15 1,600 4.6 2,000 2.8 7.5 210 0.14 3.6 Varies NV NV NV 0.42 1,200 3.5 390 20 450 0.64 1.2 49 0.0086 0.81 Varies 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)

0.64 (VI)

1.2 (VI)

6.0 (MCL)

0.0086
(VI)

0.81 (VI) Varies
SB-1 18-28 10/3/2022 <100 <100 <100 <0.500 <0.500 <0.500 <1.50 <2.50 <0.500 <0.500 <0.500 J4 <0.500 <0.500 <0.500 ND SB-2 18-28 10/3/2022 <100 1,020 160 <1.00 <1.00 <1.00 <3.00 <5.00 <1.00 <1.00 2.07 <1.00 <1.00 <1.00 J4 ND SB-3 14-24 10/4/2022 <100 <133 <133 <0.500 <0.500 <0.500 <1.50 <2.50 <0.500 <0.500 0.767 <0.500 <0.500 <0.500 ND SB-4 18-28 10/4/2022 <100 <133 <133 <0.500 <0.500 <0.500 <1.50 <2.50 <0.500 <0.500 2.29 <0.500 <0.500 <0.500 ND Notes:

Yellow shaded values exceed the Tier 1 ESL.

Detections above the laboratory reporting limit are in bold.

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

Note 1 SFRWQCB ESL for groundwater vapor intrusion.

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

Note 3 TPHd data shown represents laboratory results for carbon range C12-C22 hydrocarbons.

Note 4 TPHmo data shown represents laboratory results for carbon range C22-C40 hydrocarbons.

VOCs = Volatile Organic Compounds.

TPHg = Total Petroleum Hydrocarbons as gasoline.

TPHd = Total Petroleum Hydrocarbons as diesel.

TPHmo = Total Petroleum Hydrocarbons as motor oil.

MTBE = Methyl tert butyl ether.

PCE = Tetrachloroethene.

TCE = Trichloroethene.

DCE = Dichloroethene.

VI = Vapor Intrusion.

AH = Aquatic Habitat.

O/N = Odor/Nuisance.
µg/L = Micrograms per liter.
<0.500 = Not detected above noted laboratory reporting limit.

ND = Not detected above laboratory reporting limit.

NV = No Value Established.

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

References:

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

SFBRWQCB Vapor Intrusion ESLs Commercial Land Use Note 1 SFBRWQCB Vapor Intrusion ESLs Residential Land Use Note 1 Tier 1 ESL Note 2
(Basis)
Boring ID Date
Table 7
Summary of Soil Vapor Analytical Results - TPHg and VOCs 675 and 685 East Middlefield Road
Mountain View, California

Sample
Depth TPHg Benzene Toluene Ethylbenzene TotalXylenes Naphthalene MTBE PCE TCE cis1,2-DCE Vinyl
Chloride Chloroform Chloromethane MEK
(ft bgs) (µg/m3
) (µg/m3) (µg/m3) (µg/m3) (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 2.8 360 15 16 280 0.32 4.1 3,100 170,000 83,000 14 44,000 160 15,000 12 1,600 67 100 1,200 5.2 18 13,000 730,000 3,300 3.2 10,000 37 3,500 2.8 360 15 16 280 0.32 4.1 3,100 170,000 SVP-1 5 10/06/2022 <826 1.04 <1.88 1.59 8.63 <3.30 <0.721 2.89 <1.07 <0.793 <0.511 <0.973 98.4 <0.413 27.7 5 10/06/2022 <826 2.26 15.0 1.76 9.30 <3.30 <0.721 <1.36 <1.07 <0.793 <0.511 <0.973 421 E <0.413 69.6 15 10/06/2022 5,080 3.10 49.3 3.73 10.7 <3.30 <0.721 <1.36 2.05 <0.793 <0.511 <0.973 70.1 0.661 10.6 5 10/06/2022 <826 1.88 2.64 0.893 3.36 <3.30 <0.721 <1.36 <1.07 <0.793 <0.511 <0.973 35.9 1.01 4.54 14 10/06/2022 4,790 37.1 20.2 1.71 8.25 <3.30 <0.721 <1.36 <1.07 <0.793 <0.511 <0.973 111 <0.413 27.3 SVP-4 5 10/06/2022 <826 3.55 16.4 1.76 9.23 <3.30 <0.721 <1.36 <1.07 <0.793 <0.511 <0.973 47.1 0.415 10.7 Notes:

Blue shaded values exceed the Residential ESL.

Yellow shaded values exceed the Residential and Commercial ESLs.

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

Note 2 SFBRWQCB, Subslab/Soil Gas Human Health Risk Screening Levels for Commercial 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.
<1.07 = Not detected above the noted laboratory reporting limit.

E = The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).

VOCs = Volatile organic compounds.

TPHg = Total Petroleum Hydrocarbons as Gasoline.

MTBE = Methyl tert-butyl ether.

PCE = Tetrachloroethene.

TCE = Trichloroethene.

DCA = Dichloroethane.

DCE = Dichloroethene.

MEK = Methyl ethyl ketone (2-butanone).

Sample ID Date
Acetone
(µg/m3)
SVP-2
SVP-3
SFBRWQCB Residential ESLs Note 1 1,100,000
SFBRWQCB Commercial ESLs Note 2 4,500,000
SFRWQCB Tier 1 ESLs 1,000,000
Table 8
Summary of Maximum Soil Vapor Concentrations - Other VOCs 675 and 685 East Middlefield Road
Mountain View, California

RMD ENVIRONMENTAL SOLUTIONS, INC.
(µg/m 3 ) (µg/m 3 )
103 --

1.01 3,100
148 --

6.73 --
230 --

3.03 --

1.80 --

2.32 --

69.2 --
181 --
652 --

10.0 100,000

26.1 --

4.72 --

1.17 --
928 --

0.859 31,000

5.01 35,000

2.00 --
Notes:

Note 1 VOC listed on this tables do not have published SFBRWQCB ESLs.

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

SFBRWQCB = San Francisco Bay Regional Water Quality Control Board.

ESL = Environmental Screening Level.
1,3,5-Trimethylbenzene
Propene
Styrene
1,1,1-Trichloroethane
2,2,4-Trimethylpentane
1,2,4-Trimethylbenzene
Trichlorofluoromethane (Freon 11)
Dichlorodifluoromethane (Freon 12)
1,1,2-Trichlorotrifluoroethane (Freon 113)
Heptane
n-Hexane
Methyl Butyl Ketone
Isopropyl alcohol/2-Propanol
4-Ethyltoluene
Carbon disulfide
Chloromethane
Cyclohexane
1,3-Dichlorobenzene
Ethanol
Analyte
Maximum Detected
Concentration Tier 1 ESLs Note 1
Table 9
Summary of Soil Vapor Analytical Results - Fixed Gases
675 and 685 East Middlefield Road
Mountain View, California

Sample ID
Sample
Depth
(feet bgs)
Date Helium in Sample
(%)
Average Helium
Under Shroud
(%)
Leak RatioNote 1
(%)
Carbon
Monoxide
(%)
Carbon
Dioxide
(%)
Methane
(%)
Oxygen
(%)
SVP-1 5 10/06/2022 <0.100 15 -- <2.29 1.98 <0.262 19.3
5 10/06/2022 <0.100 17 -- <2.29 1.05 <0.262 20.2
15 10/06/2022 <0.100 18 -- <2.29 <0.900 <0.262 20.9
5 10/06/2022 3.80 16 23 <2.29 <0.900 <0.262 20.8
14 10/06/2022 <0.100 17 -- <2.29 <0.900 <0.262 20.1
SVP-4 5 10/06/2022 <0.100 16 -- <2.29 1.21 <0.262 19.9
Notes:

Fixed gases analyzed by ASTM Method D-1946.

Bold values were reported above laboratory detection limits.

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

NA = Not analyzed.
% = Percent.
<0.100 = Not detected above the noted laboratory reporting limit. -- = Not calculated, helium not detected in sample.

SVP-2
SVP-3

APPENDIX A
Boring Logs

SB-1
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL: 23.5 feet bgs
CASING TOP ELEVATION: --
BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

0.1 0.0

0.0 BORING/WELL ID:

FIRST WATER (BGS):
10/3/22 (10:50)

3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs
1 Depth (feet)
10/3/2022 (8:07)
24 feet bgs
28 feet bgs
CONTRACTOR AND EQUIPMENT:

Direct Push
Gregg Drilling/7822 DT Track Rig
SAMPLING METHOD:

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

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED

PID (PPM)
Soil Vapor ProbeConstructionDetails
PROJECT NAME AND ADDRESS:
0 START DATE/ (TIME):

TOTAL BORING DEPTH(S):

BORING LOCATION (AT SITE):

SURFACE ELEVATION: --
675 and 685 E Middlefield Road, Mountain View, CA
North Portion of Property in Parking Lot
Silty sand with gravel (SM), dark brown, dry, medium dense, fine-grained sand, no odor. 15 10
14 8
2 9
4 7
5 Clayey sand with fine gravel (SC), brown, dry, medium dense, low plasticity, no odor.

Clayey sand (SC), brown, dry, medium dense, low plasticity, no odor.

0.4 0.1
13 12
5 inch Asphalt Cover
No recovery.

Clay with sand (CL), brown, dry, medium stiff, low plasticity, no odor. 11 20
18 16
6 17
19 3
Hydrated Bentonite
No. 2/12 Sand Pack

0.25 inch Teflon Tubing
Vapor Probe
Neat Cement Grout
Dry Bentonite

SB-1
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL: 23.5 feet bgs
CASING TOP ELEVATION: --
BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Moist, stiff, no odor.

Wet.

SAMPLING METHOD: Direct Push
START DATE/ (TIME): 10/3/2022 (8:07)
FIRST WATER (BGS): 24 feet bgs
SURFACE ELEVATION: --
PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA BORING LOCATION (AT SITE): North Portion of Property in Parking Lot CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track Rig 28 feet bgs
20 0.0 21
22 0.0 23
24 25
Boring terminated at 28 feet bgs.

Grab groundwater sample collected at 18-28 feet bgs.

Backfilled with neat cement grout to 5.5 feet bgs.

Soil vapor probe installed at 5 feet bgs.
26 27
28 TOTAL BORING DEPTH(S):
29 32
33 30
31 38
34 35
39 40
BORING/WELL ID:

PID (PPM)
10/3/22 (10:50)

3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs
Depth (feet)

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)
ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Soil Vapor Probe Construction Details Clay with sand (CL), brown, dry, medium stiff, low plasticity, no odor. 36 37
Neat Cement Grout

SB-2
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

0.0 0.0

0.0 BORING/WELL ID:

PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA BORING LOCATION (AT SITE): East Portion of Property in Parking Lot; Near Ferguson Drive START DATE/ (TIME): 10/3/2022 (11:10)
Silty sand (SM), light brown, dry, loose, fine grained sand, no odor.

FIRST WATER (BGS): 24.5 feet bgs
SURFACE ELEVATION: --
CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track rig SAMPLING METHOD: Direct Push
TOTAL BORING DEPTH(S): 28 feet bgs Depth (feet)

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

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED 0 1
Silty sand with gravel (SM), brown, dry, medium dense, fine grained sand, no odor. 10 8
4 inch asphalt cover
Silt with trace fine gravel (ML), brown, dry, medium stiff, non-plastic, no odor.

Sandy silt with fine gravel (ML), light brown, dry, medium stiff, non-plastic, no odor. 5 6
7 0.0 9
16 17
13 11
20 Soil Vapor ProbeConstructionDetails
2 3
4 PID (PPM)
10/3/22 (15:30)
23 feet bgs
--

3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs
14 18
19 12
15 Neat Cement Grout
Hydrated
Bentonite
No. 2/12 Sand
Vapor Probe
Dry
Bentonite

0.25 inch Teflon Tubing

SB-2
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE: PID (PPM)
FINISH DATE/ TIME 10/3/2022 (15:30)
STABILIZED WATER LEVEL: 23 feet bgs
CASING TOP ELEVATION: --
BORING DIAMETER/DEPTH: 3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Wet.

Boring terminated at 28 feet bgs.

Grab groundwater sample collected at 18-28 feet bgs.

Backfilled with neat cement grout to 15.5 feet bgs.

Dual-nested soil vapor probe installed at 5 and 15 feet bgs.

Eastern Area of Property in Parking Lot; Near Ferguson Drive CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track rig SAMPLING METHOD: Direct Push
BORING/WELL ID:

PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA 28 21
TOTAL BORING DEPTH(S): 28 feet bgs Depth (feet)

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

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED START DATE/ (TIME): 10/3/2022 (11:10)
FIRST WATER (BGS): 24.5 feet bgs
SURFACE ELEVATION: --
Silt with sand (ML), dark brown, dry, stiff, low plasticity, no odor. 22 0.0 20
Sandy clay (CL), dark brown, moist, stiff, low plasticity, no odor. 24 25
31 0.0
26 23
30 27
32 29
36 33
34 39
40 37
38 35

0.0 Soil Vapor ProbeConstructionDetails
BORING LOCATION (AT SITE):

Neat Cement Grout

SB-3
Project No.

Logged By:

MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

0.0 0.0

0.0 0.0
Clay with sand (CL), dark brown, dry, stiff, low plasticity, no odor.

Sandy clay (CL), brown, dry, medium stiff, low plasticity, no odor.

3.25'' to 5 feet bgs; 2.25'' to 24 feet bgs
--

17.5 feet bgs
Sand with gravel (SP), light grayish brown, dry, loose, no odor.

Silty sand (SM), dark brown, dry, medium dense, no odor. 18 19
20 16
17 No recovery.
14 10
11 12
15 8
4 9
13 5
6 7
BORING/WELL ID:

PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA BORING LOCATION (AT SITE): West-Southwest Portion of Property Near Drum Storage Building 01-PRO-015
Nate Maroon
Soil Vapor ProbeConstructionDetails
START DATE/ (TIME): 10/4/2022 (11:15)
FIRST WATER (BGS): 18.5 bgs
SURFACE ELEVATION: --
10/4/2022 (15:00)
CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track rig SAMPLING METHOD: Direct Push PID (PPM)
TOTAL BORING DEPTH(S): 24 feet bgs Depth (feet)

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

ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED 3 1
0 4 inch asphalt cover
Silty sand (SM), brown, dry, loose, fine grained sand, no odor. 2 Neat Cement Grout
Hydrated Bentonite
No. 2/12 Sand Pack
Vapor Probe
Dry Bentonite

0.25 inch Teflon Tubing

SB-3
MONITORING DEVICE: PID (PPM)

FINISH DATE/ TIME
STABILIZED WATER LEVEL:

CASING TOP ELEVATION:

BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy Clay with silt and sand (CL), grayish brown, moist, medium stiff, low plasticity, no odor.

Boring terminated at 24 feet bgs.

Grab groundwater sample collected at 14-24 feet bgs.

Backfilled with neat cement grout to 14.5 fet bgs.

Dual-nested soil vapor probes installed at 5 and 14 feet bgs. 35 36
26 LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay
ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Soil Vapor Probe Construction Details Clay (CL) , dark brown, dry, soft, medium plasticity, no odor.

Depth (feet)
FIRST WATER (BGS): 18.5 bgs
10/4/2022 (15:00)

17.5 feet bgs
--
39 40
37 38
29 33
34 30
32 27
28 31
23 24
21 22
25 0.0 20
Project No. 01-PRO-015
Logged By: Nate Maroon
SURFACE ELEVATION: --
TOTAL BORING DEPTH(S): 24 feet bgs
CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track rig SAMPLING METHOD: Direct Push
START DATE/ (TIME): 10/4/2022 (11:15)

3.25'' to 5 feet bgs; 2.25'' to 24 feet bgs
PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA BORING LOCATION (AT SITE): West-Southwest Portion of Property Near Drum Storage Building BORING/WELL ID:

Neat Cement Grout

SB-4
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL: 22.5 feet bgs
CASING TOP ELEVATION: --
BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy

0.0 0.0

0.1 0.0
Silty sand (SM), brown, dry, loose, fine-grained sand, no odor.

Trace gravel.

START DATE/ (TIME): 10/3/2022 (8:25) 10/3/22 (10:50)
FIRST WATER (BGS): 23.5 feet bgs
SURFACE ELEVATION: --
4 inch Asphalt Cover
TOTAL BORING DEPTH(S): 28 feet bgs 3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs Depth (feet)

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)
ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Soil Vapor Probe Construction Details BORING/WELL ID:

PROJECT NAME AND ADDRESS: 675 and 685 E Middlefield Road, Mountain View, CA BORING LOCATION (AT SITE): South-Southeast Portion of Property in Parking Lot CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track Rig SAMPLING METHOD: Direct Push PID (PPM)
2 3
0 6
7 4
5 1
8 9
10 11
12 Sandy clay (CL), brown, dry, stiff, low plasticity, no odor.

Clay (CL), brown, dry, stiff, medium plasticity, no odor. 15 16
13 14
17 Silt with fine gravel (ML), brown, dry, medium stiff, non-plastic, no odor. 18 19
20 Hydrated
No. 2/12 Sand Pack

0.25 inch Teflon Tubing
Vapor Probe
Neat Cement Grout
Dry Bentonite

SB-4
Project No. 01-PRO-015
Logged By: Nate Maroon
MONITORING DEVICE:

FINISH DATE/ TIME
STABILIZED WATER LEVEL: 22.5 feet bgs
CASING TOP ELEVATION: --
BORING DIAMETER/DEPTH:

TimePID ReadingWater LevelSample IntervalRecovery (%)Stratigraphy BORING/WELL ID:

PROJECT NAME AND ADDRESS: 675 and 685 Middlefield Rd, Mountain View, CA BORING LOCATION (AT SITE): South-Southeast Portion of Property in Parking Lot START DATE/ (TIME): 10/3/2022 (8:25) 10/3/22 (10:50)
FIRST WATER (BGS): 23.5 feet bgs
SURFACE ELEVATION: --
CONTRACTOR AND EQUIPMENT: Gregg Drilling/7822 DT Track Rig SAMPLING METHOD: Direct Push PID (PPM)
TOTAL BORING DEPTH(S): 28 feet bgs 3.25'' to 5 feet bgs; 2.25'' to 28 feet bgs Depth (feet)

LITHOLOGIC DESCRIPTION
(classification, color, moisture, density, grain size/plasticity, other) Percentages of Composition (Gravel, Sand, Silt, Clay)
ALL PERCENTAGES ARE APPROXIMATE UNLESS OTHERWISE STATED Soil Vapor Probe Construction Details Sandy clay (CL), light brown, moist, medium stiff, low plasticity, no odor.

Wet.
29 24
25 21
26 0.0
23 0.0 20
27 28
30 Boring terminated at 28 feet bgs.

Grab groundwater sample collected at 18-28 feet bgs.

Backfilled with neat cement grout to 5.5 feet bgs.

Soil vapor probe installed at 5 feet bgs.
22 Silt with sand and gravel (ML), brown, moist, stiff, non-plastic, no odor. 33 34
31 32

0.0 40
38 39
36 35
37 Neat Cement Grout

APPENDIX B
Field Data Sheets

RMD ENVIRONMENTAL SOLUTIONS, INC.

APPENDIX C
Laboratory Analytical Reports

ANALYTICAL REPORT
October 23, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1542636
Samples Received: 10/04/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 23, 2022
[Preliminary Report]
Jennifer A McCurdy
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-015 L1542636 10/23/22 16:15 1 of 49 October 23, 2022
Mark W. Beasley
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 1 of 49

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
SB-1-1 L1542636-01 8
SB-1-5 L1542636-02 11
SB-1-10 L1542636-03 15
SB-1-15 L1542636-04 17
SB-2-1 L1542636-05 19
SB-2-5 L1542636-06 22
SB-2-10 L1542636-07 26
SB-2-15 L1542636-08 28
Qc: Quality Control Summary 30
Total Solids by Method 2540 G-2011 30
Mercury by Method 7471A 32
Metals (ICPMS) by Method 6020 33
Volatile Organic Compounds (GC) by Method 8015 35
Volatile Organic Compounds (GC/MS) by Method 8260B 36
Semi-Volatile Organic Compounds (GC) by Method 8015 40
Pesticides (GC) by Method 8081 41
Semi Volatile Organic Compounds (GC/MS) by Method 8270C 43 Gl: Glossary of Terms 47
Al: Accreditations & Locations 48
Sc: Sample Chain of Custody 49
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-015 L1542636 10/23/22 16:15 2 of 49 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 2 of 49

SAMPLE SUMMARY
Collected by Collected date/time Received date/time
SB-1-1 L1542636-01 Solid N Maroon 10/03/22 09:15 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937446 1 10/05/22 10:52 10/05/22 11:08 MAS Mt. Juliet, TN Mercury by Method 7471A WG1939719 1 10/09/22 09:20 10/10/22 08:29 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 12:06 SJM Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 01:21 JMB Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/13/22 16:28 HLA Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 2 10/12/22 08:40 10/12/22 15:50 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-1-5 L1542636-02 Solid N Maroon 10/03/22 09:30 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939719 1 10/09/22 09:19 10/10/22 08:31 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 11:49 SJM Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 25.5 10/03/22 09:30 10/06/22 07:12 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1.02 10/03/22 09:30 10/08/22 05:47 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 18:22 KAP Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 01:12 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 1 10/12/22 08:40 10/12/22 15:28 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-1-10 L1542636-03 Solid N Maroon 10/03/22 09:45 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 25.5 10/03/22 09:45 10/06/22 07:33 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1.02 10/03/22 09:45 10/08/22 06:06 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 13:10 KAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-1-15 L1542636-04 Solid N Maroon 10/03/22 10:00 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 25 10/03/22 10:00 10/06/22 07:53 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1 10/03/22 10:00 10/08/22 06:25 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 13:23 KAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-2-1 L1542636-05 Solid N Maroon 10/03/22 11:15 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939719 1 10/09/22 09:20 10/10/22 08:34 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 12:09 SJM Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 01:31 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 2 10/12/22 08:40 10/12/22 16:32 AGW 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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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
SB-2-5 L1542636-06 Solid N Maroon 10/03/22 11:30 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939719 1 10/09/22 09:20 10/10/22 08:36 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 4.46 10/21/22 16:33 10/23/22 12:12 SJM Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 31.5 10/03/22 11:30 10/06/22 08:14 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1.26 10/03/22 11:30 10/08/22 06:44 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 13:36 KAP Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 01:03 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 1 10/12/22 08:40 10/12/22 15:07 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-2-10 L1542636-07 Solid N Maroon 10/03/22 11:45 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 25 10/03/22 11:45 10/06/22 08:34 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1 10/03/22 11:45 10/08/22 07:03 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 13:49 KAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-2-15 L1542636-08 Solid N Maroon 10/03/22 12:00 10/04/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1937448 1 10/05/22 10:26 10/05/22 10:47 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1938061 25 10/03/22 12:00 10/06/22 08:55 MGF Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939282 1 10/03/22 12:00 10/08/22 07:22 DWR Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 14:16 KAP Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 10 10/10/22 07:10 10/11/22 12:51 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]
Jennifer A McCurdy
Project Manager
Metals (ICPMS) by Method 6020
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1943190 (MS) R3851856-5, (MSD) R3851856-6,
L1542636-02
Antimony, Copper and Zinc
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
WG1939282 (LCS) R3847076-1, L1542636-02, 03,
04, 06, 07, 08
Bromobenzene
Pesticides (GC) by Method 8081
RPD between the primary and confirmatory analysis exceeded 40% Batch Lab Sample ID Analytes
WG1940120 L1542636-01 4,4-DDE, 4,4-DDT and Toxaphene
WG1940120 (LCS) R3847734-2 Methoxychlor
WG1940120 (MS) R3847734-3 4,4-DDD, 4,4-DDE, 4,4-DDT, Delta BHC, Endrin, Endrin aldehyde and Methoxychlor WG1940120 (MSD) R3847734-4 4,4-DDD, 4,4-DDE, 4,4-DDT and Methoxychlor 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-015 L1542636 10/23/22 16:15 5 of 49 Mark W. Beasley
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 SB-1-1 L1542636-01 Mercury 0.0839 0.0513 1 10/10/2022 08:29 WG1939719 SB-1-5 L1542636-02 Mercury 0.116 0.0420 1 10/10/2022 08:31 WG1939719 SB-2-1 L1542636-05 Mercury 0.165 0.0438 1 10/10/2022 08:34 WG1939719 SB-2-5 L1542636-06 Mercury 0.111 0.0475 1 10/10/2022 08:36 WG1939719 Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time SB-1-1 L1542636-01 Arsenic 8.53 1.28 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Barium 261 3.21 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Chromium 58.8 6.42 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Cobalt 12.8 1.28 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Copper 28.1 6.42 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Lead 11.6 2.57 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Nickel 63.6 3.21 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Vanadium 57.1 3.21 5 10/23/2022 12:06 WG1943190 SB-1-1 L1542636-01 Zinc 66.5 32.1 5 10/23/2022 12:06 WG1943190 SB-1-5 L1542636-02 Arsenic 2.48 1.05 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Barium 106 2.63 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Chromium 49.2 5.25 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Cobalt 12.1 1.05 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Copper 26.4 J6 5.25 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Lead 4.77 2.10 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Nickel 53.3 2.63 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Vanadium 60.1 2.63 5 10/23/2022 11:49 WG1943190 SB-1-5 L1542636-02 Zinc 44.0 J6 26.3 5 10/23/2022 11:49 WG1943190 SB-2-1 L1542636-05 Arsenic 4.17 1.09 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Barium 181 2.73 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Chromium 83.5 5.47 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Cobalt 18.2 1.09 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Copper 37.3 5.47 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Lead 7.61 2.19 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Nickel 88.9 2.73 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Vanadium 81.0 2.73 5 10/23/2022 12:09 WG1943190 SB-2-1 L1542636-05 Zinc 63.6 27.3 5 10/23/2022 12:09 WG1943190 SB-2-5 L1542636-06 Arsenic 4.23 1.06 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Barium 108 2.65 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Chromium 70.1 5.30 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Cobalt 13.6 1.06 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Copper 28.2 5.30 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Lead 5.66 2.12 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Nickel 75.8 2.65 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Vanadium 68.7 2.65 4.46 10/23/2022 12:12 WG1943190 SB-2-5 L1542636-06 Zinc 47.9 26.5 4.46 10/23/2022 12:12 WG1943190 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 SB-1-5 L1542636-02 Methylene Chloride 0.457 0.0280 1.02 10/08/2022 05:47 WG1939282 SB-1-5 L1542636-02 Toluene 0.00838 0.00561 1.02 10/08/2022 05:47 WG1939282 SB-1-10 L1542636-03 Methylene Chloride 0.655 0.0385 1.02 10/08/2022 06:06 WG1939282 SB-1-10 L1542636-03 Toluene 0.00919 0.00769 1.02 10/08/2022 06:06 WG1939282 SB-1-15 L1542636-04 Methylene Chloride 0.250 0.0428 1 10/08/2022 06:25 WG1939282 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 SB-2-5 L1542636-06 Methylene Chloride 0.504 0.0421 1.26 10/08/2022 06:44 WG1939282 SB-2-5 L1542636-06 Toluene 0.0113 0.00842 1.26 10/08/2022 06:44 WG1939282 SB-2-10 L1542636-07 Methylene Chloride 0.452 0.0350 1 10/08/2022 07:03 WG1939282 SB-2-15 L1542636-08 p-Isopropyltoluene 0.0110 0.00757 1 10/08/2022 07:22 WG1939282 SB-2-15 L1542636-08 Methylene Chloride 0.444 0.0378 1 10/08/2022 07:22 WG1939282 SB-2-15 L1542636-08 Toluene 0.00993 0.00757 1 10/08/2022 07:22 WG1939282 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 SB-1-5 L1542636-02 C22-C32 Hydrocarbons 29.0 4.20 1 10/10/2022 18:22 WG1939937 SB-1-5 L1542636-02 C32-C40 Hydrocarbons 38.3 4.20 1 10/10/2022 18:22 WG1939937 SB-2-15 L1542636-08 C12-C22 Hydrocarbons 438 48.9 10 10/11/2022 12:51 WG1939937 SB-2-15 L1542636-08 C22-C32 Hydrocarbons 62.9 4.89 1 10/10/2022 14:16 WG1939937 SB-2-15 L1542636-08 C32-C40 Hydrocarbons 7.52 4.89 1 10/10/2022 14:16 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time SB-1-1 L1542636-01 Delta BHC 0.0687 0.0257 1 10/12/2022 01:21 WG1940120 SB-1-1 L1542636-01 4,4-DDE 0.191 P 0.0257 1 10/12/2022 01:21 WG1940120 SB-1-1 L1542636-01 4,4-DDT 0.0842 P 0.0257 1 10/12/2022 01:21 WG1940120 SB-1-1 L1542636-01 Dieldrin 0.357 0.0257 1 10/12/2022 01:21 WG1940120 SB-1-1 L1542636-01 Toxaphene 0.710 P 0.513 1 10/13/2022 16:28 WG1940120 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-015 L1542636 10/23/22 19:30 7 of 49 SAMPLE RESULTS - 01
L1542636
SB-1-1
Collected date/time: 10/03/22 09:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 77.9 1 10/05/2022 11:08 WG1937446
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0839 0.0513 1 10/10/2022 08:29 WG1939719
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.85 5 10/23/2022 12:06 WG1943190
Arsenic 8.53 1.28 5 10/23/2022 12:06 WG1943190
Barium 261 3.21 5 10/23/2022 12:06 WG1943190
Beryllium ND 3.21 5 10/23/2022 12:06 WG1943190
Cadmium ND 1.28 5 10/23/2022 12:06 WG1943190
Chromium 58.8 6.42 5 10/23/2022 12:06 WG1943190
Cobalt 12.8 1.28 5 10/23/2022 12:06 WG1943190
Copper 28.1 6.42 5 10/23/2022 12:06 WG1943190
Lead 11.6 2.57 5 10/23/2022 12:06 WG1943190
Molybdenum ND 3.21 5 10/23/2022 12:06 WG1943190
Nickel 63.6 3.21 5 10/23/2022 12:06 WG1943190
Selenium ND 3.21 5 10/23/2022 12:06 WG1943190
Silver ND 0.642 5 10/23/2022 12:06 WG1943190
Thallium ND 2.57 5 10/23/2022 12:06 WG1943190
Vanadium 57.1 3.21 5 10/23/2022 12:06 WG1943190
Zinc 66.5 32.1 5 10/23/2022 12:06 WG1943190
Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0257 1 10/12/2022 01:21 WG1940120
Alpha BHC ND 0.0257 1 10/12/2022 01:21 WG1940120
Beta BHC ND 0.0257 1 10/12/2022 01:21 WG1940120
Delta BHC 0.0687 0.0257 1 10/12/2022 01:21 WG1940120
Gamma BHC ND 0.0257 1 10/12/2022 01:21 WG1940120
Chlordane ND 0.385 1 10/12/2022 01:21 WG1940120
4,4-DDD ND 0.0257 1 10/12/2022 01:21 WG1940120
4,4-DDE 0.191 P 0.0257 1 10/12/2022 01:21 WG1940120
4,4-DDT 0.0842 P 0.0257 1 10/12/2022 01:21 WG1940120
Dieldrin 0.357 0.0257 1 10/12/2022 01:21 WG1940120
Endosulfan I ND 0.0257 1 10/12/2022 01:21 WG1940120
Endosulfan II ND 0.0257 1 10/12/2022 01:21 WG1940120
Endosulfan sulfate ND 0.0257 1 10/12/2022 01:21 WG1940120 Endrin ND 0.0257 1 10/12/2022 01:21 WG1940120
Endrin aldehyde ND 0.0257 1 10/12/2022 01:21 WG1940120
Endrin ketone ND 0.0257 1 10/12/2022 01:21 WG1940120
Hexachlorobenzene ND 0.0257 1 10/12/2022 01:21 WG1940120 Heptachlor ND 0.0257 1 10/12/2022 01:21 WG1940120
Heptachlor epoxide ND 0.0257 1 10/12/2022 01:21 WG1940120 Methoxychlor ND 0.0257 1 10/12/2022 01:21 WG1940120
Toxaphene 0.710 P 0.513 1 10/13/2022 16:28 WG1940120
(S) Decachlorobiphenyl 82.7 10.0-135 10/12/2022 01:21 WG1940120 (S) Decachlorobiphenyl 46.4 10.0-135 10/13/2022 16:28 WG1940120 (S) Tetrachloro-m-xylene 62.1 10.0-139 10/13/2022 16:28 WG1940120 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1542636
SB-1-1
Collected date/time: 10/03/22 09:15
Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
(S) Tetrachloro-m-xylene 72.0 10.0-139 10/12/2022 01:21 WG1940120 Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0855 2 10/12/2022 15:50 WG1940134
Acenaphthylene ND 0.0855 2 10/12/2022 15:50 WG1940134
Anthracene ND 0.0855 2 10/12/2022 15:50 WG1940134
Benzo(a)anthracene ND 0.0855 2 10/12/2022 15:50 WG1940134 Benzo(b)fluoranthene ND 0.0855 2 10/12/2022 15:50 WG1940134 Benzo(k)fluoranthene ND 0.0855 2 10/12/2022 15:50 WG1940134 Benzo(g,h,i)perylene ND 0.0855 2 10/12/2022 15:50 WG1940134 Benzo(a)pyrene ND 0.0855 2 10/12/2022 15:50 WG1940134
Bis(2-chlorethoxy)methane ND 0.855 2 10/12/2022 15:50 WG1940134 Bis(2-chloroethyl)ether ND 0.855 2 10/12/2022 15:50 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.855 2 10/12/2022 15:50 WG1940134 4-Bromophenyl-phenylether ND 0.855 2 10/12/2022 15:50 WG1940134 2-Chloronaphthalene ND 0.0855 2 10/12/2022 15:50 WG1940134 4-Chlorophenyl-phenylether ND 0.855 2 10/12/2022 15:50 WG1940134 Chrysene ND 0.0855 2 10/12/2022 15:50 WG1940134
Dibenz(a,h)anthracene ND 0.0855 2 10/12/2022 15:50 WG1940134 3,3-Dichlorobenzidine ND 0.855 2 10/12/2022 15:50 WG1940134 2,4-Dinitrotoluene ND 0.855 2 10/12/2022 15:50 WG1940134 2,6-Dinitrotoluene ND 0.855 2 10/12/2022 15:50 WG1940134 Fluoranthene ND 0.0855 2 10/12/2022 15:50 WG1940134
Fluorene ND 0.0855 2 10/12/2022 15:50 WG1940134
Hexachlorobenzene ND 0.855 2 10/12/2022 15:50 WG1940134 Hexachloro-1,3-butadiene ND 0.855 2 10/12/2022 15:50 WG1940134 Hexachlorocyclopentadiene ND 0.855 2 10/12/2022 15:50 WG1940134 Hexachloroethane ND 0.855 2 10/12/2022 15:50 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0855 2 10/12/2022 15:50 WG1940134 Isophorone ND 0.855 2 10/12/2022 15:50 WG1940134
Naphthalene ND 0.0855 2 10/12/2022 15:50 WG1940134
Nitrobenzene ND 0.855 2 10/12/2022 15:50 WG1940134
n-Nitrosodimethylamine ND 0.855 2 10/12/2022 15:50 WG1940134 n-Nitrosodiphenylamine ND 0.855 2 10/12/2022 15:50 WG1940134 n-Nitrosodi-n-propylamine ND 0.855 2 10/12/2022 15:50 WG1940134 Phenanthrene ND 0.0855 2 10/12/2022 15:50 WG1940134
Pyridine ND 0.855 2 10/12/2022 15:50 WG1940134
Benzylbutyl phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Di-n-butyl phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Diethyl phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Dimethyl phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Di-n-octyl phthalate ND 0.855 2 10/12/2022 15:50 WG1940134 Pyrene ND 0.0855 2 10/12/2022 15:50 WG1940134
1,2,4-Trichlorobenzene ND 0.855 2 10/12/2022 15:50 WG1940134 4-Chloro-3-methylphenol ND 0.855 2 10/12/2022 15:50 WG1940134 2-Chlorophenol ND 0.855 2 10/12/2022 15:50 WG1940134
2,4-Dichlorophenol ND 0.855 2 10/12/2022 15:50 WG1940134 2,4-Dimethylphenol ND 0.855 2 10/12/2022 15:50 WG1940134 4,6-Dinitro-2-methylphenol ND 0.855 2 10/12/2022 15:50 WG1940134 2,4-Dinitrophenol ND 0.855 2 10/12/2022 15:50 WG1940134 2-Methylphenol ND 0.855 2 10/12/2022 15:50 WG1940134
3&4-Methyl Phenol ND 0.855 2 10/12/2022 15:50 WG1940134 2-Nitrophenol ND 0.855 2 10/12/2022 15:50 WG1940134
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-015 L1542636 10/23/22 19:30 9 of 49 SAMPLE RESULTS - 01
L1542636
SB-1-1
Collected date/time: 10/03/22 09:15
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
4-Nitrophenol ND 0.855 2 10/12/2022 15:50 WG1940134
Pentachlorophenol ND 0.855 2 10/12/2022 15:50 WG1940134 Phenol ND 0.855 2 10/12/2022 15:50 WG1940134
2,4,6-Trichlorophenol ND 0.855 2 10/12/2022 15:50 WG1940134 2,4,5-Trichlorophenol ND 0.855 2 10/12/2022 15:50 WG1940134 (S) 2-Fluorophenol 64.5 12.0-120 10/12/2022 15:50 WG1940134 (S) Phenol-d5 58.1 10.0-120 10/12/2022 15:50 WG1940134
(S) Nitrobenzene-d5 60.4 10.0-122 10/12/2022 15:50 WG1940134 (S) 2-Fluorobiphenyl 68.1 15.0-120 10/12/2022 15:50 WG1940134 (S) 2,4,6-Tribromophenol 78.6 10.0-127 10/12/2022 15:50 WG1940134 (S) p-Terphenyl-d14 62.6 10.0-120 10/12/2022 15:50 WG1940134 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-015 L1542636 10/23/22 19:30 10 of 49 SAMPLE RESULTS - 02
L1542636
SB-1-5
Collected date/time: 10/03/22 09:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 95.2 1 10/05/2022 10:47 WG1937448
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.116 0.0420 1 10/10/2022 08:31 WG1939719
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND J6 3.15 5 10/23/2022 11:49 WG1943190
Arsenic 2.48 1.05 5 10/23/2022 11:49 WG1943190
Barium 106 2.63 5 10/23/2022 11:49 WG1943190
Beryllium ND 2.63 5 10/23/2022 11:49 WG1943190
Cadmium ND 1.05 5 10/23/2022 11:49 WG1943190
Chromium 49.2 5.25 5 10/23/2022 11:49 WG1943190
Cobalt 12.1 1.05 5 10/23/2022 11:49 WG1943190
Copper 26.4 J6 5.25 5 10/23/2022 11:49 WG1943190
Lead 4.77 2.10 5 10/23/2022 11:49 WG1943190
Molybdenum ND 2.63 5 10/23/2022 11:49 WG1943190
Nickel 53.3 2.63 5 10/23/2022 11:49 WG1943190
Selenium ND 2.63 5 10/23/2022 11:49 WG1943190
Silver ND 0.525 5 10/23/2022 11:49 WG1943190
Thallium ND 2.10 5 10/23/2022 11:49 WG1943190
Vanadium 60.1 2.63 5 10/23/2022 11:49 WG1943190
Zinc 44.0 J6 26.3 5 10/23/2022 11:49 WG1943190
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 2.80 25.5 10/06/2022 07:12 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 92.6 77.0-120 10/06/2022 07:12 WG1938061 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 0.0561 1.02 10/08/2022 05:47 WG1939282
Acrylonitrile ND 0.0141 1.02 10/08/2022 05:47 WG1939282 Benzene ND 0.00112 1.02 10/08/2022 05:47 WG1939282
Bromobenzene ND J4 0.0141 1.02 10/08/2022 05:47 WG1939282 Bromodichloromethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Bromoform ND 0.0280 1.02 10/08/2022 05:47 WG1939282
Bromomethane ND 0.0141 1.02 10/08/2022 05:47 WG1939282
n-Butylbenzene ND 0.0141 1.02 10/08/2022 05:47 WG1939282 sec-Butylbenzene ND 0.0141 1.02 10/08/2022 05:47 WG1939282 tert-Butylbenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Carbon tetrachloride ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Chlorobenzene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Chlorodibromomethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Chloroethane ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Chloroform ND 0.00280 1.02 10/08/2022 05:47 WG1939282
Chloromethane ND 0.0141 1.02 10/08/2022 05:47 WG1939282 2-Chlorotoluene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 4-Chlorotoluene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 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-015 L1542636 10/23/22 19:30 11 of 49 SAMPLE RESULTS - 02
L1542636
SB-1-5
Collected date/time: 10/03/22 09:30
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 0.0280 1.02 10/08/2022 05:47 WG1939282 1,2-Dibromoethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Dibromomethane ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,2-Dichlorobenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,3-Dichlorobenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,4-Dichlorobenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Dichlorodifluoromethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,1-Dichloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,2-Dichloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,1-Dichloroethene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 cis-1,2-Dichloroethene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 trans-1,2-Dichloroethene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,2-Dichloropropane ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,1-Dichloropropene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,3-Dichloropropane ND 0.00561 1.02 10/08/2022 05:47 WG1939282 cis-1,3-Dichloropropene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 trans-1,3-Dichloropropene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 2,2-Dichloropropane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Di-isopropyl ether ND 0.00112 1.02 10/08/2022 05:47 WG1939282 Ethylbenzene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Hexachloro-1,3-butadiene ND 0.0280 1.02 10/08/2022 05:47 WG1939282 Isopropylbenzene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 p-Isopropyltoluene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 2-Butanone (MEK) ND 0.112 1.02 10/08/2022 05:47 WG1939282 Methylene Chloride 0.457 0.0280 1.02 10/08/2022 05:47 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0280 1.02 10/08/2022 05:47 WG1939282 Methyl tert-butyl ether ND 0.00112 1.02 10/08/2022 05:47 WG1939282 Naphthalene ND 0.0141 1.02 10/08/2022 05:47 WG1939282
n-Propylbenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Styrene ND 0.0141 1.02 10/08/2022 05:47 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Tetrachloroethene ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Toluene 0.00838 0.00561 1.02 10/08/2022 05:47 WG1939282 1,2,3-Trichlorobenzene ND 0.0141 1.02 10/08/2022 05:47 WG1939282 1,2,4-Trichlorobenzene ND 0.0141 1.02 10/08/2022 05:47 WG1939282 1,1,1-Trichloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,1,2-Trichloroethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Trichloroethene ND 0.00112 1.02 10/08/2022 05:47 WG1939282 Trichlorofluoromethane ND 0.00280 1.02 10/08/2022 05:47 WG1939282 1,2,3-Trichloropropane ND 0.0141 1.02 10/08/2022 05:47 WG1939282 1,2,4-Trimethylbenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,2,3-Trimethylbenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 1,3,5-Trimethylbenzene ND 0.00561 1.02 10/08/2022 05:47 WG1939282 Vinyl chloride ND 0.00280 1.02 10/08/2022 05:47 WG1939282 Xylenes, Total ND 0.00729 1.02 10/08/2022 05:47 WG1939282 (S) Toluene-d8 96.7 75.0-131 10/08/2022 05:47 WG1939282 (S) 4-Bromofluorobenzene 107 67.0-138 10/08/2022 05:47 WG1939282 (S) 1,2-Dichloroethane-d4 105 70.0-130 10/08/2022 05:47 WG1939282 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-015 L1542636 10/23/22 19:30 12 of 49 SAMPLE RESULTS - 02
L1542636
SB-1-5
Collected date/time: 10/03/22 09:30
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 4.20 1 10/10/2022 18:22 WG1939937 C22-C32 Hydrocarbons 29.0 4.20 1 10/10/2022 18:22 WG1939937 C32-C40 Hydrocarbons 38.3 4.20 1 10/10/2022 18:22 WG1939937 (S) o-Terphenyl 60.1 18.0-148 10/10/2022 18:22 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0210 1 10/12/2022 01:12 WG1940120
Alpha BHC ND 0.0210 1 10/12/2022 01:12 WG1940120
Beta BHC ND 0.0210 1 10/12/2022 01:12 WG1940120
Delta BHC ND 0.0210 1 10/12/2022 01:12 WG1940120
Gamma BHC ND 0.0210 1 10/12/2022 01:12 WG1940120
Chlordane ND 0.315 1 10/12/2022 01:12 WG1940120
4,4-DDD ND 0.0210 1 10/12/2022 01:12 WG1940120
4,4-DDE ND 0.0210 1 10/12/2022 01:12 WG1940120
4,4-DDT ND 0.0210 1 10/12/2022 01:12 WG1940120
Dieldrin ND 0.0210 1 10/12/2022 01:12 WG1940120
Endosulfan I ND 0.0210 1 10/12/2022 01:12 WG1940120
Endosulfan II ND 0.0210 1 10/12/2022 01:12 WG1940120
Endosulfan sulfate ND 0.0210 1 10/12/2022 01:12 WG1940120 Endrin ND 0.0210 1 10/12/2022 01:12 WG1940120
Endrin aldehyde ND 0.0210 1 10/12/2022 01:12 WG1940120
Endrin ketone ND 0.0210 1 10/12/2022 01:12 WG1940120
Hexachlorobenzene ND 0.0210 1 10/12/2022 01:12 WG1940120 Heptachlor ND 0.0210 1 10/12/2022 01:12 WG1940120
Heptachlor epoxide ND 0.0210 1 10/12/2022 01:12 WG1940120 Methoxychlor ND 0.0210 1 10/12/2022 01:12 WG1940120
Toxaphene ND 0.420 1 10/12/2022 01:12 WG1940120
(S) Decachlorobiphenyl 38.8 10.0-135 10/12/2022 01:12 WG1940120 (S) Tetrachloro-m-xylene 59.5 10.0-139 10/12/2022 01:12 WG1940120 Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0350 1 10/12/2022 15:28 WG1940134
Acenaphthylene ND 0.0350 1 10/12/2022 15:28 WG1940134
Anthracene ND 0.0350 1 10/12/2022 15:28 WG1940134
Benzo(a)anthracene ND 0.0350 1 10/12/2022 15:28 WG1940134 Benzo(b)fluoranthene ND 0.0350 1 10/12/2022 15:28 WG1940134 Benzo(k)fluoranthene ND 0.0350 1 10/12/2022 15:28 WG1940134 Benzo(g,h,i)perylene ND 0.0350 1 10/12/2022 15:28 WG1940134 Benzo(a)pyrene ND 0.0350 1 10/12/2022 15:28 WG1940134
Bis(2-chlorethoxy)methane ND 0.350 1 10/12/2022 15:28 WG1940134 Bis(2-chloroethyl)ether ND 0.350 1 10/12/2022 15:28 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.350 1 10/12/2022 15:28 WG1940134 4-Bromophenyl-phenylether ND 0.350 1 10/12/2022 15:28 WG1940134 2-Chloronaphthalene ND 0.0350 1 10/12/2022 15:28 WG1940134 4-Chlorophenyl-phenylether ND 0.350 1 10/12/2022 15:28 WG1940134 Chrysene ND 0.0350 1 10/12/2022 15:28 WG1940134
Dibenz(a,h)anthracene ND 0.0350 1 10/12/2022 15:28 WG1940134 3,3-Dichlorobenzidine ND 0.350 1 10/12/2022 15:28 WG1940134 2,4-Dinitrotoluene ND 0.350 1 10/12/2022 15:28 WG1940134 2,6-Dinitrotoluene ND 0.350 1 10/12/2022 15:28 WG1940134 Fluoranthene ND 0.0350 1 10/12/2022 15:28 WG1940134
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-015 L1542636 10/23/22 19:30 13 of 49 SAMPLE RESULTS - 02
L1542636
SB-1-5
Collected date/time: 10/03/22 09:30
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Fluorene ND 0.0350 1 10/12/2022 15:28 WG1940134
Hexachlorobenzene ND 0.350 1 10/12/2022 15:28 WG1940134 Hexachloro-1,3-butadiene ND 0.350 1 10/12/2022 15:28 WG1940134 Hexachlorocyclopentadiene ND 0.350 1 10/12/2022 15:28 WG1940134 Hexachloroethane ND 0.350 1 10/12/2022 15:28 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0350 1 10/12/2022 15:28 WG1940134 Isophorone ND 0.350 1 10/12/2022 15:28 WG1940134
Naphthalene ND 0.0350 1 10/12/2022 15:28 WG1940134
Nitrobenzene ND 0.350 1 10/12/2022 15:28 WG1940134
n-Nitrosodimethylamine ND 0.350 1 10/12/2022 15:28 WG1940134 n-Nitrosodiphenylamine ND 0.350 1 10/12/2022 15:28 WG1940134 n-Nitrosodi-n-propylamine ND 0.350 1 10/12/2022 15:28 WG1940134 Phenanthrene ND 0.0350 1 10/12/2022 15:28 WG1940134
Pyridine ND 0.350 1 10/12/2022 15:28 WG1940134
Benzylbutyl phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Di-n-butyl phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Diethyl phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Dimethyl phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Di-n-octyl phthalate ND 0.350 1 10/12/2022 15:28 WG1940134 Pyrene ND 0.0350 1 10/12/2022 15:28 WG1940134
1,2,4-Trichlorobenzene ND 0.350 1 10/12/2022 15:28 WG1940134 4-Chloro-3-methylphenol ND 0.350 1 10/12/2022 15:28 WG1940134 2-Chlorophenol ND 0.350 1 10/12/2022 15:28 WG1940134
2,4-Dichlorophenol ND 0.350 1 10/12/2022 15:28 WG1940134 2,4-Dimethylphenol ND 0.350 1 10/12/2022 15:28 WG1940134 4,6-Dinitro-2-methylphenol ND 0.350 1 10/12/2022 15:28 WG1940134 2,4-Dinitrophenol ND 0.350 1 10/12/2022 15:28 WG1940134 2-Methylphenol ND 0.350 1 10/12/2022 15:28 WG1940134
3&4-Methyl Phenol ND 0.350 1 10/12/2022 15:28 WG1940134 2-Nitrophenol ND 0.350 1 10/12/2022 15:28 WG1940134
4-Nitrophenol ND 0.350 1 10/12/2022 15:28 WG1940134
Pentachlorophenol ND 0.350 1 10/12/2022 15:28 WG1940134 Phenol ND 0.350 1 10/12/2022 15:28 WG1940134
2,4,6-Trichlorophenol ND 0.350 1 10/12/2022 15:28 WG1940134 2,4,5-Trichlorophenol ND 0.350 1 10/12/2022 15:28 WG1940134 (S) 2-Fluorophenol 61.7 12.0-120 10/12/2022 15:28 WG1940134 (S) Phenol-d5 54.9 10.0-120 10/12/2022 15:28 WG1940134
(S) Nitrobenzene-d5 48.9 10.0-122 10/12/2022 15:28 WG1940134 (S) 2-Fluorobiphenyl 62.5 15.0-120 10/12/2022 15:28 WG1940134 (S) 2,4,6-Tribromophenol 72.2 10.0-127 10/12/2022 15:28 WG1940134 (S) p-Terphenyl-d14 63.4 10.0-120 10/12/2022 15:28 WG1940134 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-015 L1542636 10/23/22 19:30 14 of 49 SAMPLE RESULTS - 03
L1542636
SB-1-10
Collected date/time: 10/03/22 09:45
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 79.6 1 10/05/2022 10:47 WG1937448
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 3.85 25.5 10/06/2022 07:33 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 94.3 77.0-120 10/06/2022 07:33 WG1938061 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 0.0769 1.02 10/08/2022 06:06 WG1939282
Acrylonitrile ND 0.0193 1.02 10/08/2022 06:06 WG1939282 Benzene ND 0.00154 1.02 10/08/2022 06:06 WG1939282
Bromobenzene ND J4 0.0193 1.02 10/08/2022 06:06 WG1939282 Bromodichloromethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Bromoform ND 0.0385 1.02 10/08/2022 06:06 WG1939282
Bromomethane ND 0.0193 1.02 10/08/2022 06:06 WG1939282
n-Butylbenzene ND 0.0193 1.02 10/08/2022 06:06 WG1939282 sec-Butylbenzene ND 0.0193 1.02 10/08/2022 06:06 WG1939282 tert-Butylbenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Carbon tetrachloride ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Chlorobenzene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Chlorodibromomethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Chloroethane ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Chloroform ND 0.00385 1.02 10/08/2022 06:06 WG1939282
Chloromethane ND 0.0193 1.02 10/08/2022 06:06 WG1939282 2-Chlorotoluene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 4-Chlorotoluene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,2-Dibromo-3-Chloropropane ND 0.0385 1.02 10/08/2022 06:06 WG1939282 1,2-Dibromoethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Dibromomethane ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,2-Dichlorobenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,3-Dichlorobenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,4-Dichlorobenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Dichlorodifluoromethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,1-Dichloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,2-Dichloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,1-Dichloroethene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 cis-1,2-Dichloroethene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 trans-1,2-Dichloroethene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,2-Dichloropropane ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,1-Dichloropropene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,3-Dichloropropane ND 0.00769 1.02 10/08/2022 06:06 WG1939282 cis-1,3-Dichloropropene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 trans-1,3-Dichloropropene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 2,2-Dichloropropane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Di-isopropyl ether ND 0.00154 1.02 10/08/2022 06:06 WG1939282 Ethylbenzene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Hexachloro-1,3-butadiene ND 0.0385 1.02 10/08/2022 06:06 WG1939282 Isopropylbenzene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 p-Isopropyltoluene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 2-Butanone (MEK) ND 0.154 1.02 10/08/2022 06:06 WG1939282 Methylene Chloride 0.655 0.0385 1.02 10/08/2022 06:06 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0385 1.02 10/08/2022 06:06 WG1939282 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-015 L1542636 10/23/22 19:30 15 of 49 SAMPLE RESULTS - 03
L1542636
SB-1-10
Collected date/time: 10/03/22 09:45
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 0.00154 1.02 10/08/2022 06:06 WG1939282 Naphthalene ND 0.0193 1.02 10/08/2022 06:06 WG1939282
n-Propylbenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Styrene ND 0.0193 1.02 10/08/2022 06:06 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Tetrachloroethene ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Toluene 0.00919 0.00769 1.02 10/08/2022 06:06 WG1939282 1,2,3-Trichlorobenzene ND 0.0193 1.02 10/08/2022 06:06 WG1939282 1,2,4-Trichlorobenzene ND 0.0193 1.02 10/08/2022 06:06 WG1939282 1,1,1-Trichloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,1,2-Trichloroethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Trichloroethene ND 0.00154 1.02 10/08/2022 06:06 WG1939282 Trichlorofluoromethane ND 0.00385 1.02 10/08/2022 06:06 WG1939282 1,2,3-Trichloropropane ND 0.0193 1.02 10/08/2022 06:06 WG1939282 1,2,4-Trimethylbenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,2,3-Trimethylbenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 1,3,5-Trimethylbenzene ND 0.00769 1.02 10/08/2022 06:06 WG1939282 Vinyl chloride ND 0.00385 1.02 10/08/2022 06:06 WG1939282 Xylenes, Total ND 0.0100 1.02 10/08/2022 06:06 WG1939282 (S) Toluene-d8 100 75.0-131 10/08/2022 06:06 WG1939282
(S) 4-Bromofluorobenzene 97.7 67.0-138 10/08/2022 06:06 WG1939282 (S) 1,2-Dichloroethane-d4 104 70.0-130 10/08/2022 06:06 WG1939282 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 5.03 1 10/10/2022 13:10 WG1939937 C22-C32 Hydrocarbons ND 5.03 1 10/10/2022 13:10 WG1939937 C32-C40 Hydrocarbons ND 5.03 1 10/10/2022 13:10 WG1939937 (S) o-Terphenyl 40.1 18.0-148 10/10/2022 13:10 WG1939937 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-015 L1542636 10/23/22 19:30 16 of 49 SAMPLE RESULTS - 04
L1542636
SB-1-15
Collected date/time: 10/03/22 10:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 75.9 1 10/05/2022 10:47 WG1937448
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 4.28 25 10/06/2022 07:53 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 93.6 77.0-120 10/06/2022 07:53 WG1938061 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 0.0856 1 10/08/2022 06:25 WG1939282
Acrylonitrile ND 0.0214 1 10/08/2022 06:25 WG1939282
Benzene ND 0.00171 1 10/08/2022 06:25 WG1939282
Bromobenzene ND J4 0.0214 1 10/08/2022 06:25 WG1939282
Bromodichloromethane ND 0.00428 1 10/08/2022 06:25 WG1939282 Bromoform ND 0.0428 1 10/08/2022 06:25 WG1939282
Bromomethane ND 0.0214 1 10/08/2022 06:25 WG1939282
n-Butylbenzene ND 0.0214 1 10/08/2022 06:25 WG1939282
sec-Butylbenzene ND 0.0214 1 10/08/2022 06:25 WG1939282 tert-Butylbenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 Carbon tetrachloride ND 0.00856 1 10/08/2022 06:25 WG1939282 Chlorobenzene ND 0.00428 1 10/08/2022 06:25 WG1939282
Chlorodibromomethane ND 0.00428 1 10/08/2022 06:25 WG1939282 Chloroethane ND 0.00856 1 10/08/2022 06:25 WG1939282
Chloroform ND 0.00428 1 10/08/2022 06:25 WG1939282
Chloromethane ND 0.0214 1 10/08/2022 06:25 WG1939282
2-Chlorotoluene ND 0.00428 1 10/08/2022 06:25 WG1939282 4-Chlorotoluene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,2-Dibromo-3-Chloropropane ND 0.0428 1 10/08/2022 06:25 WG1939282 1,2-Dibromoethane ND 0.00428 1 10/08/2022 06:25 WG1939282 Dibromomethane ND 0.00856 1 10/08/2022 06:25 WG1939282
1,2-Dichlorobenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,3-Dichlorobenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,4-Dichlorobenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 Dichlorodifluoromethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,1-Dichloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,2-Dichloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,1-Dichloroethene ND 0.00428 1 10/08/2022 06:25 WG1939282 cis-1,2-Dichloroethene ND 0.00428 1 10/08/2022 06:25 WG1939282 trans-1,2-Dichloroethene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,2-Dichloropropane ND 0.00856 1 10/08/2022 06:25 WG1939282 1,1-Dichloropropene ND 0.00428 1 10/08/2022 06:25 WG1939282 1,3-Dichloropropane ND 0.00856 1 10/08/2022 06:25 WG1939282 cis-1,3-Dichloropropene ND 0.00428 1 10/08/2022 06:25 WG1939282 trans-1,3-Dichloropropene ND 0.00856 1 10/08/2022 06:25 WG1939282 2,2-Dichloropropane ND 0.00428 1 10/08/2022 06:25 WG1939282 Di-isopropyl ether ND 0.00171 1 10/08/2022 06:25 WG1939282 Ethylbenzene ND 0.00428 1 10/08/2022 06:25 WG1939282
Hexachloro-1,3-butadiene ND 0.0428 1 10/08/2022 06:25 WG1939282 Isopropylbenzene ND 0.00428 1 10/08/2022 06:25 WG1939282 p-Isopropyltoluene ND 0.00856 1 10/08/2022 06:25 WG1939282 2-Butanone (MEK) ND 0.171 1 10/08/2022 06:25 WG1939282
Methylene Chloride 0.250 0.0428 1 10/08/2022 06:25 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0428 1 10/08/2022 06:25 WG1939282 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-015 L1542636 10/23/22 19:30 17 of 49 SAMPLE RESULTS - 04
L1542636
SB-1-15
Collected date/time: 10/03/22 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
Methyl tert-butyl ether ND 0.00171 1 10/08/2022 06:25 WG1939282 Naphthalene ND 0.0214 1 10/08/2022 06:25 WG1939282
n-Propylbenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 Styrene ND 0.0214 1 10/08/2022 06:25 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 Tetrachloroethene ND 0.00428 1 10/08/2022 06:25 WG1939282 Toluene ND 0.00856 1 10/08/2022 06:25 WG1939282
1,2,3-Trichlorobenzene ND 0.0214 1 10/08/2022 06:25 WG1939282 1,2,4-Trichlorobenzene ND 0.0214 1 10/08/2022 06:25 WG1939282 1,1,1-Trichloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,1,2-Trichloroethane ND 0.00428 1 10/08/2022 06:25 WG1939282 Trichloroethene ND 0.00171 1 10/08/2022 06:25 WG1939282 Trichlorofluoromethane ND 0.00428 1 10/08/2022 06:25 WG1939282 1,2,3-Trichloropropane ND 0.0214 1 10/08/2022 06:25 WG1939282 1,2,4-Trimethylbenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,2,3-Trimethylbenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 1,3,5-Trimethylbenzene ND 0.00856 1 10/08/2022 06:25 WG1939282 Vinyl chloride ND 0.00428 1 10/08/2022 06:25 WG1939282
Xylenes, Total ND 0.0111 1 10/08/2022 06:25 WG1939282
(S) Toluene-d8 100 75.0-131 10/08/2022 06:25 WG1939282
(S) 4-Bromofluorobenzene 99.4 67.0-138 10/08/2022 06:25 WG1939282 (S) 1,2-Dichloroethane-d4 103 70.0-130 10/08/2022 06:25 WG1939282 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 5.27 1 10/10/2022 13:23 WG1939937 C22-C32 Hydrocarbons ND 5.27 1 10/10/2022 13:23 WG1939937 C32-C40 Hydrocarbons ND 5.27 1 10/10/2022 13:23 WG1939937 (S) o-Terphenyl 41.3 18.0-148 10/10/2022 13:23 WG1939937 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-015 L1542636 10/23/22 19:30 18 of 49 SAMPLE RESULTS - 05
L1542636
SB-2-1
Collected date/time: 10/03/22 11:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 91.4 1 10/05/2022 10:47 WG1937448
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.165 0.0438 1 10/10/2022 08:34 WG1939719
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.28 5 10/23/2022 12:09 WG1943190
Arsenic 4.17 1.09 5 10/23/2022 12:09 WG1943190
Barium 181 2.73 5 10/23/2022 12:09 WG1943190
Beryllium ND 2.73 5 10/23/2022 12:09 WG1943190
Cadmium ND 1.09 5 10/23/2022 12:09 WG1943190
Chromium 83.5 5.47 5 10/23/2022 12:09 WG1943190
Cobalt 18.2 1.09 5 10/23/2022 12:09 WG1943190
Copper 37.3 5.47 5 10/23/2022 12:09 WG1943190
Lead 7.61 2.19 5 10/23/2022 12:09 WG1943190
Molybdenum ND 2.73 5 10/23/2022 12:09 WG1943190
Nickel 88.9 2.73 5 10/23/2022 12:09 WG1943190
Selenium ND 2.73 5 10/23/2022 12:09 WG1943190
Silver ND 0.547 5 10/23/2022 12:09 WG1943190
Thallium ND 2.19 5 10/23/2022 12:09 WG1943190
Vanadium 81.0 2.73 5 10/23/2022 12:09 WG1943190
Zinc 63.6 27.3 5 10/23/2022 12:09 WG1943190
Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0219 1 10/12/2022 01:31 WG1940120
Alpha BHC ND 0.0219 1 10/12/2022 01:31 WG1940120
Beta BHC ND 0.0219 1 10/12/2022 01:31 WG1940120
Delta BHC ND 0.0219 1 10/12/2022 01:31 WG1940120
Gamma BHC ND 0.0219 1 10/12/2022 01:31 WG1940120
Chlordane ND 0.328 1 10/12/2022 01:31 WG1940120
4,4-DDD ND 0.0219 1 10/12/2022 01:31 WG1940120
4,4-DDE ND 0.0219 1 10/12/2022 01:31 WG1940120
4,4-DDT ND 0.0219 1 10/12/2022 01:31 WG1940120
Dieldrin ND 0.0219 1 10/12/2022 01:31 WG1940120
Endosulfan I ND 0.0219 1 10/12/2022 01:31 WG1940120
Endosulfan II ND 0.0219 1 10/12/2022 01:31 WG1940120
Endosulfan sulfate ND 0.0219 1 10/12/2022 01:31 WG1940120 Endrin ND 0.0219 1 10/12/2022 01:31 WG1940120
Endrin aldehyde ND 0.0219 1 10/12/2022 01:31 WG1940120
Endrin ketone ND 0.0219 1 10/12/2022 01:31 WG1940120
Hexachlorobenzene ND 0.0219 1 10/12/2022 01:31 WG1940120 Heptachlor ND 0.0219 1 10/12/2022 01:31 WG1940120
Heptachlor epoxide ND 0.0219 1 10/12/2022 01:31 WG1940120 Methoxychlor ND 0.0219 1 10/12/2022 01:31 WG1940120
Toxaphene ND 0.438 1 10/12/2022 01:31 WG1940120
(S) Decachlorobiphenyl 65.9 10.0-135 10/12/2022 01:31 WG1940120 (S) Tetrachloro-m-xylene 73.3 10.0-139 10/12/2022 01:31 WG1940120 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-015 L1542636 10/23/22 19:30 19 of 49 SAMPLE RESULTS - 05
L1542636
SB-2-1
Collected date/time: 10/03/22 11:15
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0728 2 10/12/2022 16:32 WG1940134
Acenaphthylene ND 0.0728 2 10/12/2022 16:32 WG1940134
Anthracene ND 0.0728 2 10/12/2022 16:32 WG1940134
Benzo(a)anthracene ND 0.0728 2 10/12/2022 16:32 WG1940134 Benzo(b)fluoranthene ND 0.0728 2 10/12/2022 16:32 WG1940134 Benzo(k)fluoranthene ND 0.0728 2 10/12/2022 16:32 WG1940134 Benzo(g,h,i)perylene ND 0.0728 2 10/12/2022 16:32 WG1940134 Benzo(a)pyrene ND 0.0728 2 10/12/2022 16:32 WG1940134
Bis(2-chlorethoxy)methane ND 0.728 2 10/12/2022 16:32 WG1940134 Bis(2-chloroethyl)ether ND 0.728 2 10/12/2022 16:32 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.728 2 10/12/2022 16:32 WG1940134 4-Bromophenyl-phenylether ND 0.728 2 10/12/2022 16:32 WG1940134 2-Chloronaphthalene ND 0.0728 2 10/12/2022 16:32 WG1940134 4-Chlorophenyl-phenylether ND 0.728 2 10/12/2022 16:32 WG1940134 Chrysene ND 0.0728 2 10/12/2022 16:32 WG1940134
Dibenz(a,h)anthracene ND 0.0728 2 10/12/2022 16:32 WG1940134 3,3-Dichlorobenzidine ND 0.728 2 10/12/2022 16:32 WG1940134 2,4-Dinitrotoluene ND 0.728 2 10/12/2022 16:32 WG1940134 2,6-Dinitrotoluene ND 0.728 2 10/12/2022 16:32 WG1940134 Fluoranthene ND 0.0728 2 10/12/2022 16:32 WG1940134
Fluorene ND 0.0728 2 10/12/2022 16:32 WG1940134
Hexachlorobenzene ND 0.728 2 10/12/2022 16:32 WG1940134 Hexachloro-1,3-butadiene ND 0.728 2 10/12/2022 16:32 WG1940134 Hexachlorocyclopentadiene ND 0.728 2 10/12/2022 16:32 WG1940134 Hexachloroethane ND 0.728 2 10/12/2022 16:32 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0728 2 10/12/2022 16:32 WG1940134 Isophorone ND 0.728 2 10/12/2022 16:32 WG1940134
Naphthalene ND 0.0728 2 10/12/2022 16:32 WG1940134
Nitrobenzene ND 0.728 2 10/12/2022 16:32 WG1940134
n-Nitrosodimethylamine ND 0.728 2 10/12/2022 16:32 WG1940134 n-Nitrosodiphenylamine ND 0.728 2 10/12/2022 16:32 WG1940134 n-Nitrosodi-n-propylamine ND 0.728 2 10/12/2022 16:32 WG1940134 Phenanthrene ND 0.0728 2 10/12/2022 16:32 WG1940134
Pyridine ND 0.728 2 10/12/2022 16:32 WG1940134
Benzylbutyl phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Di-n-butyl phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Diethyl phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Dimethyl phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Di-n-octyl phthalate ND 0.728 2 10/12/2022 16:32 WG1940134 Pyrene ND 0.0728 2 10/12/2022 16:32 WG1940134
1,2,4-Trichlorobenzene ND 0.728 2 10/12/2022 16:32 WG1940134 4-Chloro-3-methylphenol ND 0.728 2 10/12/2022 16:32 WG1940134 2-Chlorophenol ND 0.728 2 10/12/2022 16:32 WG1940134
2,4-Dichlorophenol ND 0.728 2 10/12/2022 16:32 WG1940134 2,4-Dimethylphenol ND 0.728 2 10/12/2022 16:32 WG1940134 4,6-Dinitro-2-methylphenol ND 0.728 2 10/12/2022 16:32 WG1940134 2,4-Dinitrophenol ND 0.728 2 10/12/2022 16:32 WG1940134 2-Methylphenol ND 0.728 2 10/12/2022 16:32 WG1940134
3&4-Methyl Phenol ND 0.728 2 10/12/2022 16:32 WG1940134 2-Nitrophenol ND 0.728 2 10/12/2022 16:32 WG1940134
4-Nitrophenol ND 0.728 2 10/12/2022 16:32 WG1940134
Pentachlorophenol ND 0.728 2 10/12/2022 16:32 WG1940134 Phenol ND 0.728 2 10/12/2022 16:32 WG1940134
2,4,6-Trichlorophenol ND 0.728 2 10/12/2022 16:32 WG1940134 2,4,5-Trichlorophenol ND 0.728 2 10/12/2022 16:32 WG1940134 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-015 L1542636 10/23/22 19:30 20 of 49 SAMPLE RESULTS - 05
L1542636
SB-2-1
Collected date/time: 10/03/22 11:15
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
(S) 2-Fluorophenol 56.8 12.0-120 10/12/2022 16:32 WG1940134 (S) Phenol-d5 52.0 10.0-120 10/12/2022 16:32 WG1940134
(S) Nitrobenzene-d5 49.5 10.0-122 10/12/2022 16:32 WG1940134 (S) 2-Fluorobiphenyl 57.7 15.0-120 10/12/2022 16:32 WG1940134 (S) 2,4,6-Tribromophenol 70.4 10.0-127 10/12/2022 16:32 WG1940134 (S) p-Terphenyl-d14 58.6 10.0-120 10/12/2022 16:32 WG1940134 Sample Narrative:

L1542636-05 WG1940134: Dilution due to matrix impact during extraction procedure 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-015 L1542636 10/23/22 19:30 21 of 49 SAMPLE RESULTS - 06
L1542636
SB-2-5
Collected date/time: 10/03/22 11:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 84.2 1 10/05/2022 10:47 WG1937448
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.111 0.0475 1 10/10/2022 08:36 WG1939719
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.18 4.46 10/23/2022 12:12 WG1943190
Arsenic 4.23 1.06 4.46 10/23/2022 12:12 WG1943190
Barium 108 2.65 4.46 10/23/2022 12:12 WG1943190
Beryllium ND 2.65 4.46 10/23/2022 12:12 WG1943190
Cadmium ND 1.06 4.46 10/23/2022 12:12 WG1943190
Chromium 70.1 5.30 4.46 10/23/2022 12:12 WG1943190
Cobalt 13.6 1.06 4.46 10/23/2022 12:12 WG1943190
Copper 28.2 5.30 4.46 10/23/2022 12:12 WG1943190
Lead 5.66 2.12 4.46 10/23/2022 12:12 WG1943190
Molybdenum ND 2.65 4.46 10/23/2022 12:12 WG1943190
Nickel 75.8 2.65 4.46 10/23/2022 12:12 WG1943190
Selenium ND 2.65 4.46 10/23/2022 12:12 WG1943190
Silver ND 0.530 4.46 10/23/2022 12:12 WG1943190
Thallium ND 2.12 4.46 10/23/2022 12:12 WG1943190
Vanadium 68.7 2.65 4.46 10/23/2022 12:12 WG1943190
Zinc 47.9 26.5 4.46 10/23/2022 12:12 WG1943190
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 4.21 31.5 10/06/2022 08:14 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 94.5 77.0-120 10/06/2022 08:14 WG1938061 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 0.0842 1.26 10/08/2022 06:44 WG1939282
Acrylonitrile ND 0.0211 1.26 10/08/2022 06:44 WG1939282 Benzene ND 0.00168 1.26 10/08/2022 06:44 WG1939282
Bromobenzene ND J4 0.0211 1.26 10/08/2022 06:44 WG1939282 Bromodichloromethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Bromoform ND 0.0421 1.26 10/08/2022 06:44 WG1939282
Bromomethane ND 0.0211 1.26 10/08/2022 06:44 WG1939282
n-Butylbenzene ND 0.0211 1.26 10/08/2022 06:44 WG1939282 sec-Butylbenzene ND 0.0211 1.26 10/08/2022 06:44 WG1939282 tert-Butylbenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Carbon tetrachloride ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Chlorobenzene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Chlorodibromomethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Chloroethane ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Chloroform ND 0.00421 1.26 10/08/2022 06:44 WG1939282
Chloromethane ND 0.0211 1.26 10/08/2022 06:44 WG1939282 2-Chlorotoluene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 4-Chlorotoluene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 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-015 L1542636 10/23/22 19:30 22 of 49 SAMPLE RESULTS - 06
L1542636
SB-2-5
Collected date/time: 10/03/22 11:30
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 0.0421 1.26 10/08/2022 06:44 WG1939282 1,2-Dibromoethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Dibromomethane ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,2-Dichlorobenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,3-Dichlorobenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,4-Dichlorobenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Dichlorodifluoromethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,1-Dichloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,2-Dichloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,1-Dichloroethene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 cis-1,2-Dichloroethene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 trans-1,2-Dichloroethene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,2-Dichloropropane ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,1-Dichloropropene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,3-Dichloropropane ND 0.00842 1.26 10/08/2022 06:44 WG1939282 cis-1,3-Dichloropropene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 trans-1,3-Dichloropropene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 2,2-Dichloropropane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Di-isopropyl ether ND 0.00168 1.26 10/08/2022 06:44 WG1939282 Ethylbenzene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Hexachloro-1,3-butadiene ND 0.0421 1.26 10/08/2022 06:44 WG1939282 Isopropylbenzene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 p-Isopropyltoluene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 2-Butanone (MEK) ND 0.168 1.26 10/08/2022 06:44 WG1939282 Methylene Chloride 0.504 0.0421 1.26 10/08/2022 06:44 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0421 1.26 10/08/2022 06:44 WG1939282 Methyl tert-butyl ether ND 0.00168 1.26 10/08/2022 06:44 WG1939282 Naphthalene ND 0.0211 1.26 10/08/2022 06:44 WG1939282
n-Propylbenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Styrene ND 0.0211 1.26 10/08/2022 06:44 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Tetrachloroethene ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Toluene 0.0113 0.00842 1.26 10/08/2022 06:44 WG1939282
1,2,3-Trichlorobenzene ND 0.0211 1.26 10/08/2022 06:44 WG1939282 1,2,4-Trichlorobenzene ND 0.0211 1.26 10/08/2022 06:44 WG1939282 1,1,1-Trichloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,1,2-Trichloroethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Trichloroethene ND 0.00168 1.26 10/08/2022 06:44 WG1939282 Trichlorofluoromethane ND 0.00421 1.26 10/08/2022 06:44 WG1939282 1,2,3-Trichloropropane ND 0.0211 1.26 10/08/2022 06:44 WG1939282 1,2,4-Trimethylbenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,2,3-Trimethylbenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 1,3,5-Trimethylbenzene ND 0.00842 1.26 10/08/2022 06:44 WG1939282 Vinyl chloride ND 0.00421 1.26 10/08/2022 06:44 WG1939282 Xylenes, Total ND 0.0109 1.26 10/08/2022 06:44 WG1939282 (S) Toluene-d8 99.9 75.0-131 10/08/2022 06:44 WG1939282 (S) 4-Bromofluorobenzene 100 67.0-138 10/08/2022 06:44 WG1939282 (S) 1,2-Dichloroethane-d4 103 70.0-130 10/08/2022 06:44 WG1939282 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-015 L1542636 10/23/22 19:30 23 of 49 SAMPLE RESULTS - 06
L1542636
SB-2-5
Collected date/time: 10/03/22 11:30
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 4.75 1 10/10/2022 13:36 WG1939937 C22-C32 Hydrocarbons ND 4.75 1 10/10/2022 13:36 WG1939937 C32-C40 Hydrocarbons ND 4.75 1 10/10/2022 13:36 WG1939937 (S) o-Terphenyl 42.0 18.0-148 10/10/2022 13:36 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0238 1 10/12/2022 01:03 WG1940120
Alpha BHC ND 0.0238 1 10/12/2022 01:03 WG1940120
Beta BHC ND 0.0238 1 10/12/2022 01:03 WG1940120
Delta BHC ND 0.0238 1 10/12/2022 01:03 WG1940120
Gamma BHC ND 0.0238 1 10/12/2022 01:03 WG1940120
Chlordane ND 0.356 1 10/12/2022 01:03 WG1940120
4,4-DDD ND 0.0238 1 10/12/2022 01:03 WG1940120
4,4-DDE ND 0.0238 1 10/12/2022 01:03 WG1940120
4,4-DDT ND 0.0238 1 10/12/2022 01:03 WG1940120
Dieldrin ND 0.0238 1 10/12/2022 01:03 WG1940120
Endosulfan I ND 0.0238 1 10/12/2022 01:03 WG1940120
Endosulfan II ND 0.0238 1 10/12/2022 01:03 WG1940120
Endosulfan sulfate ND 0.0238 1 10/12/2022 01:03 WG1940120 Endrin ND 0.0238 1 10/12/2022 01:03 WG1940120
Endrin aldehyde ND 0.0238 1 10/12/2022 01:03 WG1940120
Endrin ketone ND 0.0238 1 10/12/2022 01:03 WG1940120
Hexachlorobenzene ND 0.0238 1 10/12/2022 01:03 WG1940120 Heptachlor ND 0.0238 1 10/12/2022 01:03 WG1940120
Heptachlor epoxide ND 0.0238 1 10/12/2022 01:03 WG1940120 Methoxychlor ND 0.0238 1 10/12/2022 01:03 WG1940120
Toxaphene ND 0.475 1 10/12/2022 01:03 WG1940120
(S) Decachlorobiphenyl 30.2 10.0-135 10/12/2022 01:03 WG1940120 (S) Tetrachloro-m-xylene 55.1 10.0-139 10/12/2022 01:03 WG1940120 Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0395 1 10/12/2022 15:07 WG1940134
Acenaphthylene ND 0.0395 1 10/12/2022 15:07 WG1940134
Anthracene ND 0.0395 1 10/12/2022 15:07 WG1940134
Benzo(a)anthracene ND 0.0395 1 10/12/2022 15:07 WG1940134 Benzo(b)fluoranthene ND 0.0395 1 10/12/2022 15:07 WG1940134 Benzo(k)fluoranthene ND 0.0395 1 10/12/2022 15:07 WG1940134 Benzo(g,h,i)perylene ND 0.0395 1 10/12/2022 15:07 WG1940134 Benzo(a)pyrene ND 0.0395 1 10/12/2022 15:07 WG1940134
Bis(2-chlorethoxy)methane ND 0.395 1 10/12/2022 15:07 WG1940134 Bis(2-chloroethyl)ether ND 0.395 1 10/12/2022 15:07 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.395 1 10/12/2022 15:07 WG1940134 4-Bromophenyl-phenylether ND 0.395 1 10/12/2022 15:07 WG1940134 2-Chloronaphthalene ND 0.0395 1 10/12/2022 15:07 WG1940134 4-Chlorophenyl-phenylether ND 0.395 1 10/12/2022 15:07 WG1940134 Chrysene ND 0.0395 1 10/12/2022 15:07 WG1940134
Dibenz(a,h)anthracene ND 0.0395 1 10/12/2022 15:07 WG1940134 3,3-Dichlorobenzidine ND 0.395 1 10/12/2022 15:07 WG1940134 2,4-Dinitrotoluene ND 0.395 1 10/12/2022 15:07 WG1940134 2,6-Dinitrotoluene ND 0.395 1 10/12/2022 15:07 WG1940134 Fluoranthene ND 0.0395 1 10/12/2022 15:07 WG1940134
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-015 L1542636 10/23/22 19:30 24 of 49 SAMPLE RESULTS - 06
L1542636
SB-2-5
Collected date/time: 10/03/22 11:30
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Fluorene ND 0.0395 1 10/12/2022 15:07 WG1940134
Hexachlorobenzene ND 0.395 1 10/12/2022 15:07 WG1940134 Hexachloro-1,3-butadiene ND 0.395 1 10/12/2022 15:07 WG1940134 Hexachlorocyclopentadiene ND 0.395 1 10/12/2022 15:07 WG1940134 Hexachloroethane ND 0.395 1 10/12/2022 15:07 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0395 1 10/12/2022 15:07 WG1940134 Isophorone ND 0.395 1 10/12/2022 15:07 WG1940134
Naphthalene ND 0.0395 1 10/12/2022 15:07 WG1940134
Nitrobenzene ND 0.395 1 10/12/2022 15:07 WG1940134
n-Nitrosodimethylamine ND 0.395 1 10/12/2022 15:07 WG1940134 n-Nitrosodiphenylamine ND 0.395 1 10/12/2022 15:07 WG1940134 n-Nitrosodi-n-propylamine ND 0.395 1 10/12/2022 15:07 WG1940134 Phenanthrene ND 0.0395 1 10/12/2022 15:07 WG1940134
Pyridine ND 0.395 1 10/12/2022 15:07 WG1940134
Benzylbutyl phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Di-n-butyl phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Diethyl phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Dimethyl phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Di-n-octyl phthalate ND 0.395 1 10/12/2022 15:07 WG1940134 Pyrene ND 0.0395 1 10/12/2022 15:07 WG1940134
1,2,4-Trichlorobenzene ND 0.395 1 10/12/2022 15:07 WG1940134 4-Chloro-3-methylphenol ND 0.395 1 10/12/2022 15:07 WG1940134 2-Chlorophenol ND 0.395 1 10/12/2022 15:07 WG1940134
2,4-Dichlorophenol ND 0.395 1 10/12/2022 15:07 WG1940134 2,4-Dimethylphenol ND 0.395 1 10/12/2022 15:07 WG1940134 4,6-Dinitro-2-methylphenol ND 0.395 1 10/12/2022 15:07 WG1940134 2,4-Dinitrophenol ND 0.395 1 10/12/2022 15:07 WG1940134 2-Methylphenol ND 0.395 1 10/12/2022 15:07 WG1940134
3&4-Methyl Phenol ND 0.395 1 10/12/2022 15:07 WG1940134 2-Nitrophenol ND 0.395 1 10/12/2022 15:07 WG1940134
4-Nitrophenol ND 0.395 1 10/12/2022 15:07 WG1940134
Pentachlorophenol ND 0.395 1 10/12/2022 15:07 WG1940134 Phenol ND 0.395 1 10/12/2022 15:07 WG1940134
2,4,6-Trichlorophenol ND 0.395 1 10/12/2022 15:07 WG1940134 2,4,5-Trichlorophenol ND 0.395 1 10/12/2022 15:07 WG1940134 (S) 2-Fluorophenol 60.8 12.0-120 10/12/2022 15:07 WG1940134 (S) Phenol-d5 52.0 10.0-120 10/12/2022 15:07 WG1940134
(S) Nitrobenzene-d5 51.7 10.0-122 10/12/2022 15:07 WG1940134 (S) 2-Fluorobiphenyl 58.5 15.0-120 10/12/2022 15:07 WG1940134 (S) 2,4,6-Tribromophenol 70.3 10.0-127 10/12/2022 15:07 WG1940134 (S) p-Terphenyl-d14 66.6 10.0-120 10/12/2022 15:07 WG1940134 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-015 L1542636 10/23/22 19:30 25 of 49 SAMPLE RESULTS - 07
L1542636
SB-2-10
Collected date/time: 10/03/22 11:45
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 84.3 1 10/05/2022 10:47 WG1937448
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 25 10/06/2022 08:34 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 93.4 77.0-120 10/06/2022 08:34 WG1938061 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 10/08/2022 07:03 WG1939282
Acrylonitrile ND 0.0175 1 10/08/2022 07:03 WG1939282
Benzene ND 0.00140 1 10/08/2022 07:03 WG1939282
Bromobenzene ND J4 0.0175 1 10/08/2022 07:03 WG1939282
Bromodichloromethane ND 0.00350 1 10/08/2022 07:03 WG1939282 Bromoform ND 0.0350 1 10/08/2022 07:03 WG1939282
Bromomethane ND 0.0175 1 10/08/2022 07:03 WG1939282
n-Butylbenzene ND 0.0175 1 10/08/2022 07:03 WG1939282
sec-Butylbenzene ND 0.0175 1 10/08/2022 07:03 WG1939282 tert-Butylbenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 Carbon tetrachloride ND 0.00700 1 10/08/2022 07:03 WG1939282 Chlorobenzene ND 0.00350 1 10/08/2022 07:03 WG1939282
Chlorodibromomethane ND 0.00350 1 10/08/2022 07:03 WG1939282 Chloroethane ND 0.00700 1 10/08/2022 07:03 WG1939282
Chloroform ND 0.00350 1 10/08/2022 07:03 WG1939282
Chloromethane ND 0.0175 1 10/08/2022 07:03 WG1939282
2-Chlorotoluene ND 0.00350 1 10/08/2022 07:03 WG1939282 4-Chlorotoluene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,2-Dibromo-3-Chloropropane ND 0.0350 1 10/08/2022 07:03 WG1939282 1,2-Dibromoethane ND 0.00350 1 10/08/2022 07:03 WG1939282 Dibromomethane ND 0.00700 1 10/08/2022 07:03 WG1939282
1,2-Dichlorobenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,3-Dichlorobenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,4-Dichlorobenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 Dichlorodifluoromethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,1-Dichloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,2-Dichloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,1-Dichloroethene ND 0.00350 1 10/08/2022 07:03 WG1939282 cis-1,2-Dichloroethene ND 0.00350 1 10/08/2022 07:03 WG1939282 trans-1,2-Dichloroethene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,2-Dichloropropane ND 0.00700 1 10/08/2022 07:03 WG1939282 1,1-Dichloropropene ND 0.00350 1 10/08/2022 07:03 WG1939282 1,3-Dichloropropane ND 0.00700 1 10/08/2022 07:03 WG1939282 cis-1,3-Dichloropropene ND 0.00350 1 10/08/2022 07:03 WG1939282 trans-1,3-Dichloropropene ND 0.00700 1 10/08/2022 07:03 WG1939282 2,2-Dichloropropane ND 0.00350 1 10/08/2022 07:03 WG1939282 Di-isopropyl ether ND 0.00140 1 10/08/2022 07:03 WG1939282 Ethylbenzene ND 0.00350 1 10/08/2022 07:03 WG1939282
Hexachloro-1,3-butadiene ND 0.0350 1 10/08/2022 07:03 WG1939282 Isopropylbenzene ND 0.00350 1 10/08/2022 07:03 WG1939282 p-Isopropyltoluene ND 0.00700 1 10/08/2022 07:03 WG1939282 2-Butanone (MEK) ND 0.140 1 10/08/2022 07:03 WG1939282
Methylene Chloride 0.452 0.0350 1 10/08/2022 07:03 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0350 1 10/08/2022 07:03 WG1939282 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-015 L1542636 10/23/22 19:30 26 of 49 SAMPLE RESULTS - 07
L1542636
SB-2-10
Collected date/time: 10/03/22 11:45
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 10/08/2022 07:03 WG1939282 Naphthalene ND 0.0175 1 10/08/2022 07:03 WG1939282
n-Propylbenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 Styrene ND 0.0175 1 10/08/2022 07:03 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 Tetrachloroethene ND 0.00350 1 10/08/2022 07:03 WG1939282 Toluene ND 0.00700 1 10/08/2022 07:03 WG1939282
1,2,3-Trichlorobenzene ND 0.0175 1 10/08/2022 07:03 WG1939282 1,2,4-Trichlorobenzene ND 0.0175 1 10/08/2022 07:03 WG1939282 1,1,1-Trichloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,1,2-Trichloroethane ND 0.00350 1 10/08/2022 07:03 WG1939282 Trichloroethene ND 0.00140 1 10/08/2022 07:03 WG1939282 Trichlorofluoromethane ND 0.00350 1 10/08/2022 07:03 WG1939282 1,2,3-Trichloropropane ND 0.0175 1 10/08/2022 07:03 WG1939282 1,2,4-Trimethylbenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,2,3-Trimethylbenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 1,3,5-Trimethylbenzene ND 0.00700 1 10/08/2022 07:03 WG1939282 Vinyl chloride ND 0.00350 1 10/08/2022 07:03 WG1939282
Xylenes, Total ND 0.00909 1 10/08/2022 07:03 WG1939282
(S) Toluene-d8 95.2 75.0-131 10/08/2022 07:03 WG1939282 (S) 4-Bromofluorobenzene 107 67.0-138 10/08/2022 07:03 WG1939282 (S) 1,2-Dichloroethane-d4 109 70.0-130 10/08/2022 07:03 WG1939282 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 4.75 1 10/10/2022 13:49 WG1939937 C22-C32 Hydrocarbons ND 4.75 1 10/10/2022 13:49 WG1939937 C32-C40 Hydrocarbons ND 4.75 1 10/10/2022 13:49 WG1939937 (S) o-Terphenyl 48.4 18.0-148 10/10/2022 13:49 WG1939937 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-015 L1542636 10/23/22 19:30 27 of 49 SAMPLE RESULTS - 08
L1542636
SB-2-15
Collected date/time: 10/03/22 12:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 81.8 1 10/05/2022 10:47 WG1937448
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 3.78 25 10/06/2022 08:55 WG1938061
(S) a,a,a-Trifluorotoluene(FID) 94.0 77.0-120 10/06/2022 08:55 WG1938061 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 0.0757 1 10/08/2022 07:22 WG1939282
Acrylonitrile ND 0.0189 1 10/08/2022 07:22 WG1939282
Benzene ND 0.00151 1 10/08/2022 07:22 WG1939282
Bromobenzene ND J4 0.0189 1 10/08/2022 07:22 WG1939282
Bromodichloromethane ND 0.00378 1 10/08/2022 07:22 WG1939282 Bromoform ND 0.0378 1 10/08/2022 07:22 WG1939282
Bromomethane ND 0.0189 1 10/08/2022 07:22 WG1939282
n-Butylbenzene ND 0.0189 1 10/08/2022 07:22 WG1939282
sec-Butylbenzene ND 0.0189 1 10/08/2022 07:22 WG1939282 tert-Butylbenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 Carbon tetrachloride ND 0.00757 1 10/08/2022 07:22 WG1939282 Chlorobenzene ND 0.00378 1 10/08/2022 07:22 WG1939282
Chlorodibromomethane ND 0.00378 1 10/08/2022 07:22 WG1939282 Chloroethane ND 0.00757 1 10/08/2022 07:22 WG1939282
Chloroform ND 0.00378 1 10/08/2022 07:22 WG1939282
Chloromethane ND 0.0189 1 10/08/2022 07:22 WG1939282
2-Chlorotoluene ND 0.00378 1 10/08/2022 07:22 WG1939282 4-Chlorotoluene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,2-Dibromo-3-Chloropropane ND 0.0378 1 10/08/2022 07:22 WG1939282 1,2-Dibromoethane ND 0.00378 1 10/08/2022 07:22 WG1939282 Dibromomethane ND 0.00757 1 10/08/2022 07:22 WG1939282
1,2-Dichlorobenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,3-Dichlorobenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,4-Dichlorobenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 Dichlorodifluoromethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,1-Dichloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,2-Dichloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,1-Dichloroethene ND 0.00378 1 10/08/2022 07:22 WG1939282 cis-1,2-Dichloroethene ND 0.00378 1 10/08/2022 07:22 WG1939282 trans-1,2-Dichloroethene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,2-Dichloropropane ND 0.00757 1 10/08/2022 07:22 WG1939282 1,1-Dichloropropene ND 0.00378 1 10/08/2022 07:22 WG1939282 1,3-Dichloropropane ND 0.00757 1 10/08/2022 07:22 WG1939282 cis-1,3-Dichloropropene ND 0.00378 1 10/08/2022 07:22 WG1939282 trans-1,3-Dichloropropene ND 0.00757 1 10/08/2022 07:22 WG1939282 2,2-Dichloropropane ND 0.00378 1 10/08/2022 07:22 WG1939282 Di-isopropyl ether ND 0.00151 1 10/08/2022 07:22 WG1939282 Ethylbenzene ND 0.00378 1 10/08/2022 07:22 WG1939282
Hexachloro-1,3-butadiene ND 0.0378 1 10/08/2022 07:22 WG1939282 Isopropylbenzene ND 0.00378 1 10/08/2022 07:22 WG1939282 p-Isopropyltoluene 0.0110 0.00757 1 10/08/2022 07:22 WG1939282 2-Butanone (MEK) ND 0.151 1 10/08/2022 07:22 WG1939282
Methylene Chloride 0.444 0.0378 1 10/08/2022 07:22 WG1939282 4-Methyl-2-pentanone (MIBK) ND 0.0378 1 10/08/2022 07:22 WG1939282 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-015 L1542636 10/23/22 19:30 28 of 49 SAMPLE RESULTS - 08
L1542636
SB-2-15
Collected date/time: 10/03/22 12:00
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 0.00151 1 10/08/2022 07:22 WG1939282 Naphthalene ND 0.0189 1 10/08/2022 07:22 WG1939282
n-Propylbenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 Styrene ND 0.0189 1 10/08/2022 07:22 WG1939282
1,1,1,2-Tetrachloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,1,2,2-Tetrachloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,1,2-Trichlorotrifluoroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 Tetrachloroethene ND 0.00378 1 10/08/2022 07:22 WG1939282 Toluene 0.00993 0.00757 1 10/08/2022 07:22 WG1939282
1,2,3-Trichlorobenzene ND 0.0189 1 10/08/2022 07:22 WG1939282 1,2,4-Trichlorobenzene ND 0.0189 1 10/08/2022 07:22 WG1939282 1,1,1-Trichloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,1,2-Trichloroethane ND 0.00378 1 10/08/2022 07:22 WG1939282 Trichloroethene ND 0.00151 1 10/08/2022 07:22 WG1939282 Trichlorofluoromethane ND 0.00378 1 10/08/2022 07:22 WG1939282 1,2,3-Trichloropropane ND 0.0189 1 10/08/2022 07:22 WG1939282 1,2,4-Trimethylbenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,2,3-Trimethylbenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 1,3,5-Trimethylbenzene ND 0.00757 1 10/08/2022 07:22 WG1939282 Vinyl chloride ND 0.00378 1 10/08/2022 07:22 WG1939282
Xylenes, Total ND 0.00984 1 10/08/2022 07:22 WG1939282
(S) Toluene-d8 96.4 75.0-131 10/08/2022 07:22 WG1939282 (S) 4-Bromofluorobenzene 107 67.0-138 10/08/2022 07:22 WG1939282 (S) 1,2-Dichloroethane-d4 106 70.0-130 10/08/2022 07:22 WG1939282 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 438 48.9 10 10/11/2022 12:51 WG1939937 C22-C32 Hydrocarbons 62.9 4.89 1 10/10/2022 14:16 WG1939937 C32-C40 Hydrocarbons 7.52 4.89 1 10/10/2022 14:16 WG1939937 (S) o-Terphenyl 67.7 18.0-148 10/10/2022 14:16 WG1939937 (S) o-Terphenyl 67.7 18.0-148 10/11/2022 12:51 WG1939937 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-015 L1542636 10/23/22 19:30 29 of 49 WG1937446 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1542636-01
Method Blank (MB)
(MB) R3845272-1 10/05/22 11:08
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1542603-07 Original Sample (OS) • Duplicate (DUP)
(OS) L1542603-07 10/05/22 11:08 • (DUP) R3845272-3 10/05/22 11:08 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 89.8 92.8 1 3.26 10
Laboratory Control Sample (LCS)
(LCS) R3845272-2 10/05/22 11:08
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:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 30 of 49 WG1937448 QUALITY CONTROL SUMMARY
Total Solids by Method 2540 G-2011 L1542636-02,03,04,05,06,07,08 Method Blank (MB)
(MB) R3845269-1 10/05/22 10:47
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1542636-02 Original Sample (OS) • Duplicate (DUP)
(OS) L1542636-02 10/05/22 10:47 • (DUP) R3845269-3 10/05/22 10:47 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 95.2 96.3 1 1.17 10
Laboratory Control Sample (LCS)
(LCS) R3845269-2 10/05/22 10:47
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:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 31 of 49 WG1939719 QUALITY CONTROL SUMMARY
Mercury by Method 7471A L1542636-01,02,05,06
Method Blank (MB)
(MB) R3846461-1 10/10/22 08:13
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) R3846461-2 10/10/22 08:16
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Mercury 0.500 0.507 101 80.0-120
L1543666-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543666-05 10/10/22 08:18 • (MS) R3846461-3 10/10/22 08:21 • (MSD) R3846461-4 10/10/22 08:24 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 0.506 ND 0.526 0.449 104 88.8 1 75.0-125 15.7 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:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 32 of 49 WG1943190 QUALITY CONTROL SUMMARY
Metals (ICPMS) by Method 6020 L1542636-01,02,05,06
Method Blank (MB)
(MB) R3851856-1 10/23/22 11:43
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Antimony U 0.166 3.00
Arsenic U 0.100 1.00
Barium U 0.152 2.50
Beryllium U 0.138 2.50
Cadmium U 0.0855 1.00
Chromium U 0.297 5.00
Cobalt U 0.0463 1.00
Copper U 0.133 5.00
Lead U 0.0990 2.00
Molybdenum U 0.101 2.50
Nickel U 0.197 2.50
Selenium U 0.180 2.50
Silver U 0.0865 0.500
Thallium U 0.0650 2.00
Vanadium U 0.187 2.50
Zinc U 0.740 25.0
Laboratory Control Sample (LCS)
(LCS) R3851856-2 10/23/22 11:46
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Antimony 100 98.5 98.5 80.0-120
Arsenic 100 97.7 97.7 80.0-120
Barium 100 96.9 96.9 80.0-120
Beryllium 100 101 101 80.0-120
Cadmium 100 101 101 80.0-120
Chromium 100 98.7 98.7 80.0-120
Cobalt 100 101 101 80.0-120
Copper 100 97.3 97.3 80.0-120
Lead 100 96.6 96.6 80.0-120
Molybdenum 100 99.9 99.9 80.0-120
Nickel 100 99.7 99.7 80.0-120
Selenium 100 103 103 80.0-120
Silver 20.0 20.9 105 80.0-120
Thallium 100 97.5 97.5 80.0-120
Vanadium 100 99.8 99.8 80.0-120
Zinc 100 93.7 93.7 80.0-120
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-015 L1542636 10/23/22 19:30 33 of 49 WG1943190 QUALITY CONTROL SUMMARY
Metals (ICPMS) by Method 6020 L1542636-01,02,05,06
L1542636-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1542636-02 10/23/22 11:49 • (MS) R3851856-5 10/23/22 11:59 • (MSD) R3851856-6 10/23/22 12:02 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 105 ND 41.2 36.3 39.2 34.6 5 75.0-125 J6 J6 12.5 20 Arsenic 105 2.48 96.0 89.1 89.0 82.4 5 75.0-125 7.51 20 Barium 105 106 207 216 95.4 104 5 75.0-125 4.42 20
Beryllium 105 ND 91.6 82.0 86.7 77.6 5 75.0-125 11.0 20 Cadmium 105 ND 99.1 93.1 94.2 88.6 5 75.0-125 6.21 20
Chromium 105 49.2 147 142 93.0 88.5 5 75.0-125 3.28 20
Cobalt 105 12.1 105 96.8 88.4 80.6 5 75.0-125 8.08 20
Copper 105 26.4 105 99.3 75.1 69.4 5 75.0-125 J6 5.86 20 Lead 105 4.77 97.3 87.4 88.1 78.7 5 75.0-125 10.8 20
Molybdenum 105 ND 92.5 86.5 87.8 82.1 5 75.0-125 6.68 20 Nickel 105 53.3 147 143 89.5 85.2 5 75.0-125 3.14 20
Selenium 105 ND 103 98.1 97.8 93.1 5 75.0-125 4.89 20
Silver 21.0 ND 20.2 19.2 96.3 91.6 5 75.0-125 5.02 20
Thallium 105 ND 96.1 86.4 91.5 82.2 5 75.0-125 10.7 20
Vanadium 105 60.1 152 145 87.2 80.4 5 75.0-125 4.81 20
Zinc 105 44.0 130 122 81.5 74.1 5 75.0-125 J6 6.17 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:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 34 of 49 WG1938061 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC) by Method 8015 L1542636-02,03,04,06,07,08 Method Blank (MB)
(MB) R3845296-2 10/06/22 06:29
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
TPHG C5 - C12 U 0.830 2.50
(S)
a,a,a-Trifluorotoluene(FID) 93.3 77.0-120
Laboratory Control Sample (LCS)
(LCS) R3845296-1 10/06/22 05:01
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
TPHG C5 - C12 5.50 6.15 112 72.0-125
(S)
a,a,a-Trifluorotoluene(FID) 111 77.0-120
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-015 L1542636 10/23/22 19:30 35 of 49 WG1939282 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542636-02,03,04,06,07,08 Method Blank (MB)
(MB) R3847076-2 10/08/22 01:02
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
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 36 of 49 WG1939282 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542636-02,03,04,06,07,08 Method Blank (MB)
(MB) R3847076-2 10/08/22 01:02
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 0.00260 J 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 96.8 75.0-131
(S) 4-Bromofluorobenzene 106 67.0-138
(S) 1,2-Dichloroethane-d4 109 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3847076-1 10/08/22 00:04
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Acetone 0.625 0.623 99.7 10.0-160
Acrylonitrile 0.625 0.585 93.6 45.0-153
Benzene 0.125 0.130 104 70.0-123
Bromobenzene 0.125 0.154 123 73.0-121 J4
Bromodichloromethane 0.125 0.139 111 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 L1542636-02,03,04,06,07,08 Laboratory Control Sample (LCS)
(LCS) R3847076-1 10/08/22 00:04
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Bromoform 0.125 0.124 99.2 64.0-132
Bromomethane 0.125 0.135 108 56.0-147
n-Butylbenzene 0.125 0.130 104 68.0-135
sec-Butylbenzene 0.125 0.146 117 74.0-130
tert-Butylbenzene 0.125 0.148 118 75.0-127
Carbon tetrachloride 0.125 0.154 123 66.0-128
Chlorobenzene 0.125 0.128 102 76.0-128
Chlorodibromomethane 0.125 0.137 110 74.0-127
Chloroethane 0.125 0.142 114 61.0-134
Chloroform 0.125 0.141 113 72.0-123
Chloromethane 0.125 0.121 96.8 51.0-138
2-Chlorotoluene 0.125 0.145 116 75.0-124
4-Chlorotoluene 0.125 0.145 116 75.0-124
1,2-Dibromo-3-Chloropropane 0.125 0.129 103 59.0-130
1,2-Dibromoethane 0.125 0.128 102 74.0-128
Dibromomethane 0.125 0.148 118 75.0-122
1,2-Dichlorobenzene 0.125 0.119 95.2 76.0-124
1,3-Dichlorobenzene 0.125 0.130 104 76.0-125
1,4-Dichlorobenzene 0.125 0.126 101 77.0-121
Dichlorodifluoromethane 0.125 0.156 125 43.0-156
1,1-Dichloroethane 0.125 0.137 110 70.0-127
1,2-Dichloroethane 0.125 0.150 120 65.0-131
1,1-Dichloroethene 0.125 0.119 95.2 65.0-131
cis-1,2-Dichloroethene 0.125 0.132 106 73.0-125
trans-1,2-Dichloroethene 0.125 0.137 110 71.0-125
1,2-Dichloropropane 0.125 0.128 102 74.0-125
1,1-Dichloropropene 0.125 0.132 106 73.0-125
1,3-Dichloropropane 0.125 0.130 104 80.0-125
cis-1,3-Dichloropropene 0.125 0.135 108 76.0-127
trans-1,3-Dichloropropene 0.125 0.137 110 73.0-127
2,2-Dichloropropane 0.125 0.155 124 59.0-135
Di-isopropyl ether 0.125 0.138 110 60.0-136
Ethylbenzene 0.125 0.124 99.2 74.0-126
Hexachloro-1,3-butadiene 0.125 0.118 94.4 57.0-150
Isopropylbenzene 0.125 0.131 105 72.0-127
p-Isopropyltoluene 0.125 0.141 113 72.0-133
2-Butanone (MEK) 0.625 0.701 112 30.0-160
Methylene Chloride 0.125 0.134 107 68.0-123
4-Methyl-2-pentanone (MIBK) 0.625 0.697 112 56.0-143
Methyl tert-butyl ether 0.125 0.145 116 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 L1542636-02,03,04,06,07,08 Laboratory Control Sample (LCS)
(LCS) R3847076-1 10/08/22 00:04
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Naphthalene 0.125 0.143 114 59.0-130
n-Propylbenzene 0.125 0.140 112 74.0-126
Styrene 0.125 0.125 100 72.0-127
1,1,1,2-Tetrachloroethane 0.125 0.128 102 74.0-129
1,1,2,2-Tetrachloroethane 0.125 0.138 110 68.0-128
1,1,2-Trichlorotrifluoroethane 0.125 0.0940 75.2 61.0-139 Tetrachloroethene 0.125 0.129 103 70.0-136
Toluene 0.125 0.125 100 75.0-121
1,2,3-Trichlorobenzene 0.125 0.141 113 59.0-139
1,2,4-Trichlorobenzene 0.125 0.114 91.2 62.0-137
1,1,1-Trichloroethane 0.125 0.141 113 69.0-126
1,1,2-Trichloroethane 0.125 0.128 102 78.0-123
Trichloroethene 0.125 0.140 112 76.0-126
Trichlorofluoromethane 0.125 0.126 101 61.0-142
1,2,3-Trichloropropane 0.125 0.150 120 67.0-129
1,2,4-Trimethylbenzene 0.125 0.142 114 70.0-126
1,2,3-Trimethylbenzene 0.125 0.133 106 74.0-124
1,3,5-Trimethylbenzene 0.125 0.146 117 73.0-127
Vinyl chloride 0.125 0.140 112 63.0-134
Xylenes, Total 0.375 0.383 102 72.0-127
(S) Toluene-d8 97.5 75.0-131
(S) 4-Bromofluorobenzene 96.5 67.0-138
(S) 1,2-Dichloroethane-d4 109 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 L1542636-02,03,04,06,07,08 Method Blank (MB)
(MB) R3847033-1 10/10/22 12:45
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 71.2 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3847033-2 10/10/22 12:57
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 50.0 18.8 37.6 50.0-150
C22-C32 Hydrocarbons 25.0 17.6 70.4 50.0-150
(S) o-Terphenyl 69.8 18.0-148
L1543130-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543130-03 10/10/22 15:34 • (MS) R3847033-3 10/10/22 15:47 • (MSD) R3847033-4 10/10/22 16:00 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 28.8 ND 17.3 15.7 60.1 54.4 1 50.0-150 9.86 20 C22-C32 Hydrocarbons 28.8 ND 17.4 16.0 60.5 55.6 1 50.0-150 8.33 20 (S) o-Terphenyl 51.1 43.5 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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Pesticides (GC) by Method 8081 L1542636-01,02,05,06
Method Blank (MB)
(MB) R3847734-1 10/12/22 00:44
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Aldrin U 0.00376 0.0200
Alpha BHC U 0.00368 0.0200
Beta BHC U 0.00379 0.0200
Delta BHC U 0.00346 0.0200
Gamma BHC U 0.00344 0.0200
Chlordane U 0.103 0.300
4,4-DDD U 0.00370 0.0200
4,4-DDE U 0.00366 0.0200
4,4-DDT U 0.00627 0.0200
Dieldrin U 0.00344 0.0200
Endosulfan I U 0.00363 0.0200
Endosulfan II U 0.00335 0.0200
Endosulfan sulfate U 0.00364 0.0200
Endrin U 0.00350 0.0200
Endrin aldehyde U 0.00339 0.0200
Endrin ketone U 0.00711 0.0200
Hexachlorobenzene U 0.00346 0.0200
Heptachlor U 0.00428 0.0200
Heptachlor epoxide U 0.00339 0.0200
Methoxychlor U 0.00484 0.0200
Toxaphene U 0.124 0.400
(S) Decachlorobiphenyl 67.1 10.0-135
(S) Tetrachloro-m-xylene 64.6 10.0-139
Laboratory Control Sample (LCS)
(LCS) R3847734-2 10/12/22 00:54
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Aldrin 0.0666 0.0445 66.8 34.0-136
Alpha BHC 0.0666 0.0394 59.2 34.0-139
Beta BHC 0.0666 0.0444 66.7 34.0-133
Delta BHC 0.0666 0.0362 54.4 34.0-135
Gamma BHC 0.0666 0.0385 57.8 34.0-136
4,4-DDD 0.0666 0.0403 60.5 33.0-141
4,4-DDE 0.0666 0.0390 58.6 34.0-134
4,4-DDT 0.0666 0.0338 50.8 30.0-143
Dieldrin 0.0666 0.0449 67.4 35.0-137
Endosulfan I 0.0666 0.0436 65.5 34.0-134
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Pesticides (GC) by Method 8081 L1542636-01,02,05,06
Laboratory Control Sample (LCS)
(LCS) R3847734-2 10/12/22 00:54
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Endosulfan II 0.0666 0.0451 67.7 35.0-132
Endosulfan sulfate 0.0666 0.0416 62.5 35.0-132
Endrin 0.0666 0.0386 58.0 34.0-137
Endrin aldehyde 0.0666 0.0371 55.7 23.0-121
Endrin ketone 0.0666 0.0403 60.5 35.0-144
Hexachlorobenzene 0.0666 0.0415 62.3 33.0-129
Heptachlor 0.0666 0.0465 69.8 36.0-141
Heptachlor epoxide 0.0666 0.0441 66.2 36.0-134
Methoxychlor 0.0666 0.0328 49.2 28.0-150 P
(S) Decachlorobiphenyl 63.2 10.0-135
(S) Tetrachloro-m-xylene 62.5 10.0-139
L1543130-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543130-02 10/12/22 01:40 • (MS) R3847734-3 10/12/22 01:49 • (MSD) R3847734-4 10/12/22 01:59 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 % % % % %
Aldrin 0.0699 ND 0.0421 0.0416 60.2 59.4 1 20.0-135 1.28 37 Alpha BHC 0.0699 ND 0.0407 0.0404 58.2 57.7 1 27.0-140 0.793 35 Beta BHC 0.0699 ND 0.0412 0.0412 59.0 59.0 1 23.0-141 0.000 37 Delta BHC 0.0699 ND 0.0390 0.0391 55.7 55.9 1 21.0-138 P 0.274 35 Gamma BHC 0.0699 ND 0.0397 0.0394 56.8 56.4 1 27.0-137 0.812 36 4,4-DDD 0.0699 ND 0.0361 0.0359 51.6 51.3 1 15.0-152 P P 0.595 39 4,4-DDE 0.0699 ND 0.0356 0.0357 50.8 51.0 1 10.0-152 P P 0.301 40 4,4-DDT 0.0699 ND 0.0330 0.0336 47.2 48.1 1 10.0-151 P P 1.93 40 Dieldrin 0.0699 ND 0.0417 0.0415 59.6 59.3 1 17.0-145 0.515 37 Endosulfan I 0.0699 ND 0.0401 0.0401 57.3 57.3 1 20.0-137 0.000 36 Endosulfan II 0.0699 ND 0.0405 0.0402 57.9 57.4 1 15.0-141 0.797 37 Endosulfan sulfate 0.0699 ND 0.0391 0.0391 55.9 55.9 1 15.0-143 0.000 38 Endrin 0.0699 ND 0.0388 0.0390 55.4 55.7 1 19.0-143 P 0.551 37 Endrin aldehyde 0.0699 ND 0.0404 0.0405 57.7 57.9 1 10.0-139 P 0.265 40 Endrin ketone 0.0699 ND 0.0392 0.0370 56.0 52.8 1 17.0-149 5.91 38 Hexachlorobenzene 0.0699 ND 0.0437 0.0440 62.5 62.9 1 25.0-126 0.733 35 Heptachlor 0.0699 ND 0.0439 0.0431 62.8 61.6 1 22.0-138 1.97 37 Heptachlor epoxide 0.0699 ND 0.0411 0.0410 58.8 58.7 1 22.0-138 0.261 36 Methoxychlor 0.0699 ND 0.0334 0.0336 47.8 48.1 1 10.0-159 P P 0.639 40 (S) Decachlorobiphenyl 56.2 55.6 10.0-135
(S) Tetrachloro-m-xylene 63.7 61.1 10.0-139
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/MS) by Method 8270C L1542636-01,02,05,06 Method Blank (MB)
(MB) R3847765-2 10/12/22 14:46
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acenaphthene U 0.00539 0.0333
Acenaphthylene U 0.00469 0.0333
Anthracene U 0.00593 0.0333
Benzo(a)anthracene U 0.00587 0.0333
Benzo(b)fluoranthene U 0.00621 0.0333
Benzo(k)fluoranthene U 0.00592 0.0333
Benzo(g,h,i)perylene U 0.00609 0.0333
Benzo(a)pyrene U 0.00619 0.0333
Bis(2-chlorethoxy)methane U 0.0100 0.333
Bis(2-chloroethyl)ether U 0.0110 0.333
2,2-oxybis(1-chloropropane) U 0.0144 0.333
4-Bromophenyl-phenylether U 0.0117 0.333
2-Chloronaphthalene U 0.00585 0.0333
4-Chlorophenyl-phenylether U 0.0116 0.333
Chrysene U 0.00662 0.0333
Dibenz(a,h)anthracene U 0.00923 0.0333
3,3-Dichlorobenzidine U 0.0123 0.333
2,4-Dinitrotoluene U 0.00955 0.333
2,6-Dinitrotoluene U 0.0109 0.333
Fluoranthene U 0.00601 0.0333
Fluorene U 0.00542 0.0333
Hexachlorobenzene U 0.0118 0.333
Hexachloro-1,3-butadiene U 0.0112 0.333
Hexachlorocyclopentadiene U 0.0175 0.333
Hexachloroethane U 0.0131 0.333
Indeno(1,2,3-cd)pyrene U 0.00941 0.0333
Isophorone U 0.0102 0.333
Naphthalene U 0.00836 0.0333
Nitrobenzene U 0.0116 0.333
n-Nitrosodimethylamine U 0.0494 0.333
n-Nitrosodiphenylamine U 0.0252 0.333
n-Nitrosodi-n-propylamine U 0.0111 0.333
Phenanthrene U 0.00661 0.0333
Pyridine U 0.0220 0.333
Benzylbutyl phthalate U 0.0104 0.333
Bis(2-ethylhexyl)phthalate U 0.0422 0.333
Di-n-butyl phthalate U 0.0114 0.333
Diethyl phthalate U 0.0110 0.333
Dimethyl phthalate U 0.0706 0.333
Di-n-octyl phthalate U 0.0225 0.333
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/MS) by Method 8270C L1542636-01,02,05,06 Method Blank (MB)
(MB) R3847765-2 10/12/22 14:46
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Pyrene U 0.00648 0.0333
1,2,4-Trichlorobenzene U 0.0104 0.333
4-Chloro-3-methylphenol U 0.0108 0.333
2-Chlorophenol U 0.0110 0.333
2,4-Dichlorophenol U 0.00970 0.333
2,4-Dimethylphenol U 0.00870 0.333
4,6-Dinitro-2-methylphenol U 0.0755 0.333
2,4-Dinitrophenol U 0.0779 0.333
2-Methylphenol U 0.0100 0.333
3&4-Methyl Phenol U 0.0104 0.333
2-Nitrophenol U 0.0119 0.333
4-Nitrophenol U 0.0104 0.333
Pentachlorophenol U 0.00896 0.333
Phenol U 0.0134 0.333
2,4,6-Trichlorophenol U 0.0107 0.333
2,4,5-Trichlorophenol U 0.0113 0.333
(S) 2-Fluorophenol 49.4 12.0-120
(S) Phenol-d5 45.8 10.0-120
(S) Nitrobenzene-d5 43.5 10.0-122
(S) 2-Fluorobiphenyl 44.7 15.0-120
(S) 2,4,6-Tribromophenol 53.5 10.0-127
(S) p-Terphenyl-d14 57.1 10.0-120
Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Acenaphthene 0.666 0.359 53.9 38.0-120
Acenaphthylene 0.666 0.378 56.8 40.0-120
Anthracene 0.666 0.367 55.1 42.0-120
Benzo(a)anthracene 0.666 0.398 59.8 44.0-120
Benzo(b)fluoranthene 0.666 0.399 59.9 43.0-120
Benzo(k)fluoranthene 0.666 0.373 56.0 44.0-120
Benzo(g,h,i)perylene 0.666 0.421 63.2 43.0-120
Benzo(a)pyrene 0.666 0.410 61.6 45.0-120
Bis(2-chlorethoxy)methane 0.666 0.254 38.1 20.0-120
Bis(2-chloroethyl)ether 0.666 0.279 41.9 16.0-120
2,2-Oxybis(1-Chloropropane) 0.666 0.301 45.2 23.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Semi Volatile Organic Compounds (GC/MS) by Method 8270C L1542636-01,02,05,06 Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
4-Bromophenyl-phenylether 0.666 0.391 58.7 40.0-120
2-Chloronaphthalene 0.666 0.353 53.0 35.0-120
4-Chlorophenyl-phenylether 0.666 0.394 59.2 40.0-120
Chrysene 0.666 0.385 57.8 43.0-120
Dibenz(a,h)anthracene 0.666 0.395 59.3 44.0-120
3,3-Dichlorobenzidine 1.33 0.717 53.9 28.0-120
2,4-Dinitrotoluene 0.666 0.425 63.8 45.0-120
2,6-Dinitrotoluene 0.666 0.414 62.2 42.0-120
Fluoranthene 0.666 0.367 55.1 44.0-120
Fluorene 0.666 0.374 56.2 41.0-120
Hexachlorobenzene 0.666 0.387 58.1 39.0-120
Hexachloro-1,3-butadiene 0.666 0.335 50.3 15.0-120
Hexachlorocyclopentadiene 0.666 0.131 19.7 15.0-120
Hexachloroethane 0.666 0.314 47.1 17.0-120
Indeno(1,2,3-cd)pyrene 0.666 0.437 65.6 45.0-120
Isophorone 0.666 0.216 32.4 23.0-120
Naphthalene 0.666 0.282 42.3 18.0-120
Nitrobenzene 0.666 0.253 38.0 17.0-120
n-Nitrosodimethylamine 0.666 0.238 35.7 10.0-125
n-Nitrosodiphenylamine 0.666 0.329 49.4 40.0-120
n-Nitrosodi-n-propylamine 0.666 0.283 42.5 26.0-120
Phenanthrene 0.666 0.367 55.1 42.0-120
Pyridine 0.666 0.152 22.8 10.0-120
Benzylbutyl phthalate 0.666 0.393 59.0 40.0-120
Bis(2-ethylhexyl)phthalate 0.666 0.377 56.6 41.0-120
Di-n-butyl phthalate 0.666 0.345 51.8 43.0-120
Diethyl phthalate 0.666 0.392 58.9 43.0-120
Dimethyl phthalate 0.666 0.391 58.7 43.0-120
Di-n-octyl phthalate 0.666 0.399 59.9 40.0-120
Pyrene 0.666 0.376 56.5 41.0-120
1,2,4-Trichlorobenzene 0.666 0.320 48.0 17.0-120
4-Chloro-3-methylphenol 0.666 0.303 45.5 28.0-120
2-Chlorophenol 0.666 0.353 53.0 28.0-120
2,4-Dichlorophenol 0.666 0.338 50.8 25.0-120
2,4-Dimethylphenol 0.666 0.319 47.9 15.0-120
4,6-Dinitro-2-methylphenol 0.666 0.342 51.4 16.0-120
2,4-Dinitrophenol 0.666 0.245 36.8 10.0-120
2-Methylphenol 0.666 0.347 52.1 35.0-120
3&4-Methyl Phenol 0.666 0.375 56.3 42.0-120
2-Nitrophenol 0.666 0.335 50.3 20.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542636 10/23/22 19:30 45 of 49 WG1940134 QUALITY CONTROL SUMMARY
Semi Volatile Organic Compounds (GC/MS) by Method 8270C L1542636-01,02,05,06 Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
4-Nitrophenol 0.666 0.375 56.3 27.0-120
Pentachlorophenol 0.666 0.350 52.6 29.0-120
Phenol 0.666 0.305 45.8 28.0-120
2,4,6-Trichlorophenol 0.666 0.399 59.9 37.0-120
2,4,5-Trichlorophenol 0.666 0.379 56.9 38.0-120
(S) 2-Fluorophenol 50.0 12.0-120
(S) Phenol-d5 46.5 10.0-120
(S) Nitrobenzene-d5 37.8 10.0-122
(S) 2-Fluorobiphenyl 53.2 15.0-120
(S) 2,4,6-Tribromophenol 61.4 10.0-127
(S) p-Terphenyl-d14 60.1 10.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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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.

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

P RPD between the primary and confirmatory analysis exceeded 40%. 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-015 L1542636 10/23/22 19:30 47 of 49 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
October 23, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1543130
Samples Received: 10/05/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 23, 2022
[Preliminary Report]
Jennifer A McCurdy
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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Mark W. Beasley
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 7
Sr: Sample Results 9
SB-3-1 L1543130-01 9
SB-3-5 L1543130-02 12
SB-3-10 L1543130-03 16
SB-3-15 L1543130-04 18
SB-4-1 L1543130-05 20
SB-4-5 L1543130-06 23
SB-4-10 L1543130-07 27
SB-4-15 L1543130-08 29
Qc: Quality Control Summary 31
Total Solids by Method 2540 G-2011 31
Mercury by Method 7471A 32
Metals (ICPMS) by Method 6020 34
Volatile Organic Compounds (GC) by Method 8015 36
Volatile Organic Compounds (GC/MS) by Method 8260B 37
Semi-Volatile Organic Compounds (GC) by Method 8015 41
Pesticides (GC) by Method 8081 43
Semi Volatile Organic Compounds (GC/MS) by Method 8270C 47 Gl: Glossary of Terms 51
Al: Accreditations & Locations 52
Sc: Sample Chain of Custody 53
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
SB-3-1 L1543130-01 Solid N. MAROON 10/04/22 09:00 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939780 1 10/10/22 08:44 10/11/22 13:01 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 13:02 SJM Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 02:08 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 2 10/12/22 08:40 10/13/22 15:56 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-3-5 L1543130-02 Solid 10/04/22 09:15 10/05/22 08:00
Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939780 .833 10/10/22 08:44 10/11/22 13:04 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 13:05 SJM Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 09:15 10/17/22 14:43 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 09:15 10/08/22 22:40 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 5 10/10/22 07:10 10/10/22 18:48 KAP Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940120 1 10/11/22 13:03 10/12/22 01:40 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 2 10/12/22 08:40 10/12/22 19:22 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-3-10 L1543130-03 Solid 10/04/22 09:30 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 09:30 10/17/22 15:03 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 09:30 10/08/22 23:00 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 15:34 KAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-3-15 L1543130-04 Solid 10/04/22 09:45 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 09:45 10/17/22 15:24 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 09:45 10/08/22 23:19 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 14:55 KAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-4-1 L1543130-05 Solid 10/04/22 11:30 10/05/22 08:00
Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Mercury by Method 7471A WG1939780 1 10/10/22 08:44 10/11/22 11:55 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 13:08 SJM Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940661 1 10/12/22 09:45 10/12/22 14:45 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 10 10/12/22 08:40 10/12/22 20:04 AGW 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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SAMPLE SUMMARY
Collected by Collected date/time Received date/time
SB-4-5 L1543130-06 Solid 10/04/22 11:45 10/05/22 08:00
Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Mercury by Method 7471A WG1940588 1 10/11/22 08:39 10/12/22 10:15 SRT Mt. Juliet, TN Metals (ICPMS) by Method 6020 WG1943190 5 10/21/22 16:33 10/23/22 13:12 SJM Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 11:45 10/17/22 15:44 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 11:45 10/08/22 23:38 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 17:17 KAP Mt. Juliet, TN Pesticides (GC) by Method 8081 WG1940661 1 10/12/22 09:45 10/12/22 14:03 JMB Mt. Juliet, TN Semi Volatile Organic Compounds (GC/MS) by Method 8270C WG1940134 2 10/12/22 08:40 10/12/22 18:18 AGW Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-4-10 L1543130-07 Solid 10/04/22 12:00 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 12:00 10/17/22 16:05 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 12:00 10/08/22 23:57 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1941312 1 10/13/22 02:34 10/13/22 08:34 JAS Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-4-15 L1543130-08 Solid 10/04/22 12:15 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Total Solids by Method 2540 G-2011 WG1938060 1 10/06/22 13:00 10/06/22 13:08 CMK Mt. Juliet, TN Volatile Organic Compounds (GC) by Method 8015 WG1944061 25 10/04/22 12:15 10/17/22 16:25 BAM Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939614 1 10/04/22 12:15 10/09/22 00:16 ACG Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 8015 WG1939937 1 10/10/22 07:10 10/10/22 14:03 KAP 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]
Jennifer A McCurdy
Project Manager
Mercury by Method 7471A
The sample matrix interfered with the ability to make any accurate determination; spike value is high.

Batch Lab Sample ID Analytes
WG1939780 (MSD) R3847139-4, L1543130-05 Mercury
The analyte failed the method required serial dilution test and/or subsequent post-spike criteria. These failures indicate matrix interference.

Batch Lab Sample ID Analytes
WG1939780 L1543130-05 Mercury
Metals (ICPMS) by Method 6020
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1943190 (MS) R3851856-5, (MSD) R3851856-6 Antimony, Copper and Zinc 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
WG1939614 (LCSD) R3847938-2, L1543130-02, 03,
04, 06, 07, 08
Acetone
The associated batch QC was outside the established quality control range for precision.

Batch Lab Sample ID Analytes
WG1939614 (LCSD) R3847938-2, L1543130-02, 03,
04, 06, 07, 08
Acetone
Semi-Volatile Organic Compounds (GC) by Method 8015
The sample matrix interfered with the ability to make any accurate determination; spike value is high.

Batch Lab Sample ID Analytes
WG1941312 (MS) R3848115-3, (MSD) R3848115-4 C12-C22 Hydrocarbons and C22-C32 Hydrocarbons 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
Pesticides (GC) by Method 8081
RPD between the primary and confirmatory analysis exceeded 40% Batch Lab Sample ID Analytes
WG1940120 (LCS) R3847734-2 Methoxychlor
WG1940120 (MS) R3847734-3 4,4-DDD, 4,4-DDE, 4,4-DDT, Delta BHC, Endrin, Endrin aldehyde and Methoxychlor WG1940120 (MSD) R3847734-4 4,4-DDD, 4,4-DDE, 4,4-DDT and Methoxychlor WG1940661 L1543130-05 4,4-DDE
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
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time SB-3-1 L1543130-01 Mercury 0.107 0.0418 1 10/11/2022 13:01 WG1939780 SB-3-5 L1543130-02 Mercury 0.0745 0.0357 .833 10/11/2022 13:04 WG1939780 SB-4-1 L1543130-05 Mercury 0.0779 J5 O1 0.0431 1 10/11/2022 11:55 WG1939780 SB-4-5 L1543130-06 Mercury 0.0706 0.0432 1 10/12/2022 10:15 WG1940588 Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time SB-3-1 L1543130-01 Arsenic 3.33 1.04 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Barium 278 2.61 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Chromium 63.5 5.22 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Cobalt 12.6 1.04 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Copper 25.9 5.22 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Lead 4.91 2.09 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Nickel 70.4 2.61 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Vanadium 60.9 2.61 5 10/23/2022 13:02 WG1943190 SB-3-1 L1543130-01 Zinc 45.0 26.1 5 10/23/2022 13:02 WG1943190 SB-3-5 L1543130-02 Arsenic 5.28 1.07 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Barium 246 2.68 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Chromium 86.3 5.36 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Cobalt 18.9 1.07 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Copper 36.5 5.36 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Lead 8.03 2.14 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Nickel 89.7 2.68 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Vanadium 92.6 2.68 5 10/23/2022 13:05 WG1943190 SB-3-5 L1543130-02 Zinc 70.0 26.8 5 10/23/2022 13:05 WG1943190 SB-4-1 L1543130-05 Arsenic 3.82 1.08 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Barium 498 2.69 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Chromium 64.3 5.39 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Cobalt 13.8 1.08 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Copper 29.2 5.39 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Lead 6.01 2.15 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Nickel 73.4 2.69 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Vanadium 62.9 2.69 5 10/23/2022 13:08 WG1943190 SB-4-1 L1543130-05 Zinc 54.6 26.9 5 10/23/2022 13:08 WG1943190 SB-4-5 L1543130-06 Arsenic 3.54 1.08 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Barium 136 2.70 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Chromium 63.6 5.40 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Cobalt 14.5 1.08 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Copper 25.6 5.40 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Lead 5.44 2.16 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Nickel 85.5 2.70 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Vanadium 59.2 2.70 5 10/23/2022 13:12 WG1943190 SB-4-5 L1543130-06 Zinc 47.4 27.0 5 10/23/2022 13:12 WG1943190 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 SB-3-5 L1543130-02 Methylene Chloride 0.428 0.0286 1 10/08/2022 22:40 WG1939614 SB-3-5 L1543130-02 Toluene 0.0109 0.00573 1 10/08/2022 22:40 WG1939614 SB-3-10 L1543130-03 Methylene Chloride 0.254 0.0337 1 10/08/2022 23:00 WG1939614 SB-3-10 L1543130-03 Toluene 0.0103 0.00673 1 10/08/2022 23:00 WG1939614 SB-3-15 L1543130-04 Methylene Chloride 0.503 0.0341 1 10/08/2022 23:19 WG1939614 SB-3-15 L1543130-04 Toluene 0.0133 0.00681 1 10/08/2022 23:19 WG1939614 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
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 SB-4-5 L1543130-06 Methylene Chloride 0.502 0.0292 1 10/08/2022 23:38 WG1939614 SB-4-5 L1543130-06 Toluene 0.00852 0.00583 1 10/08/2022 23:38 WG1939614 SB-4-10 L1543130-07 Methylene Chloride 0.965 0.0392 1 10/08/2022 23:57 WG1939614 SB-4-10 L1543130-07 Toluene 0.0128 0.00785 1 10/08/2022 23:57 WG1939614 SB-4-15 L1543130-08 Methylene Chloride 0.497 0.0369 1 10/09/2022 00:16 WG1939614 SB-4-15 L1543130-08 Toluene 0.00806 0.00738 1 10/09/2022 00:16 WG1939614 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 SB-3-5 L1543130-02 C22-C32 Hydrocarbons 47.0 21.4 5 10/10/2022 18:48 WG1939937 SB-3-5 L1543130-02 C32-C40 Hydrocarbons 86.6 21.4 5 10/10/2022 18:48 WG1939937 SB-4-5 L1543130-06 C22-C32 Hydrocarbons 9.42 4.32 1 10/10/2022 17:17 WG1939937 SB-4-5 L1543130-06 C32-C40 Hydrocarbons 12.8 4.32 1 10/10/2022 17:17 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Client ID Lab Sample ID Analyte mg/kg mg/kg date / time SB-4-1 L1543130-05 4,4-DDE 0.0754 P 0.0215 1 10/12/2022 14:45 WG1940661 SB-4-1 L1543130-05 Dieldrin 0.0515 0.0215 1 10/12/2022 14:45 WG1940661 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-015 L1543130 10/23/22 19:33 8 of 53 SAMPLE RESULTS - 01
L1543130
SB-3-1
Collected date/time: 10/04/22 09:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 95.7 1 10/06/2022 13:08 WG1938060
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.107 0.0418 1 10/11/2022 13:01 WG1939780
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.13 5 10/23/2022 13:02 WG1943190
Arsenic 3.33 1.04 5 10/23/2022 13:02 WG1943190
Barium 278 2.61 5 10/23/2022 13:02 WG1943190
Beryllium ND 2.61 5 10/23/2022 13:02 WG1943190
Cadmium ND 1.04 5 10/23/2022 13:02 WG1943190
Chromium 63.5 5.22 5 10/23/2022 13:02 WG1943190
Cobalt 12.6 1.04 5 10/23/2022 13:02 WG1943190
Copper 25.9 5.22 5 10/23/2022 13:02 WG1943190
Lead 4.91 2.09 5 10/23/2022 13:02 WG1943190
Molybdenum ND 2.61 5 10/23/2022 13:02 WG1943190
Nickel 70.4 2.61 5 10/23/2022 13:02 WG1943190
Selenium ND 2.61 5 10/23/2022 13:02 WG1943190
Silver ND 0.522 5 10/23/2022 13:02 WG1943190
Thallium ND 2.09 5 10/23/2022 13:02 WG1943190
Vanadium 60.9 2.61 5 10/23/2022 13:02 WG1943190
Zinc 45.0 26.1 5 10/23/2022 13:02 WG1943190
Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0209 1 10/12/2022 02:08 WG1940120
Alpha BHC ND 0.0209 1 10/12/2022 02:08 WG1940120
Beta BHC ND 0.0209 1 10/12/2022 02:08 WG1940120
Delta BHC ND 0.0209 1 10/12/2022 02:08 WG1940120
Gamma BHC ND 0.0209 1 10/12/2022 02:08 WG1940120
Chlordane ND 0.313 1 10/12/2022 02:08 WG1940120
4,4-DDD ND 0.0209 1 10/12/2022 02:08 WG1940120
4,4-DDE ND 0.0209 1 10/12/2022 02:08 WG1940120
4,4-DDT ND 0.0209 1 10/12/2022 02:08 WG1940120
Dieldrin ND 0.0209 1 10/12/2022 02:08 WG1940120
Endosulfan I ND 0.0209 1 10/12/2022 02:08 WG1940120
Endosulfan II ND 0.0209 1 10/12/2022 02:08 WG1940120
Endosulfan sulfate ND 0.0209 1 10/12/2022 02:08 WG1940120 Endrin ND 0.0209 1 10/12/2022 02:08 WG1940120
Endrin aldehyde ND 0.0209 1 10/12/2022 02:08 WG1940120
Endrin ketone ND 0.0209 1 10/12/2022 02:08 WG1940120
Hexachlorobenzene ND 0.0209 1 10/12/2022 02:08 WG1940120 Heptachlor ND 0.0209 1 10/12/2022 02:08 WG1940120
Heptachlor epoxide ND 0.0209 1 10/12/2022 02:08 WG1940120 Methoxychlor ND 0.0209 1 10/12/2022 02:08 WG1940120
Toxaphene ND 0.418 1 10/12/2022 02:08 WG1940120
(S) Decachlorobiphenyl 67.1 10.0-135 10/12/2022 02:08 WG1940120 (S) Tetrachloro-m-xylene 68.6 10.0-139 10/12/2022 02:08 WG1940120 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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L1543130
SB-3-1
Collected date/time: 10/04/22 09:00
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0696 2 10/13/2022 15:56 WG1940134
Acenaphthylene ND 0.0696 2 10/13/2022 15:56 WG1940134
Anthracene ND 0.0696 2 10/13/2022 15:56 WG1940134
Benzo(a)anthracene ND 0.0696 2 10/13/2022 15:56 WG1940134 Benzo(b)fluoranthene ND 0.0696 2 10/13/2022 15:56 WG1940134 Benzo(k)fluoranthene ND 0.0696 2 10/13/2022 15:56 WG1940134 Benzo(g,h,i)perylene ND 0.0696 2 10/13/2022 15:56 WG1940134 Benzo(a)pyrene ND 0.0696 2 10/13/2022 15:56 WG1940134
Bis(2-chlorethoxy)methane ND 0.696 2 10/13/2022 15:56 WG1940134 Bis(2-chloroethyl)ether ND 0.696 2 10/13/2022 15:56 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.696 2 10/13/2022 15:56 WG1940134 4-Bromophenyl-phenylether ND 0.696 2 10/13/2022 15:56 WG1940134 2-Chloronaphthalene ND 0.0696 2 10/13/2022 15:56 WG1940134 4-Chlorophenyl-phenylether ND 0.696 2 10/13/2022 15:56 WG1940134 Chrysene ND 0.0696 2 10/13/2022 15:56 WG1940134
Dibenz(a,h)anthracene ND 0.0696 2 10/13/2022 15:56 WG1940134 3,3-Dichlorobenzidine ND 0.696 2 10/13/2022 15:56 WG1940134 2,4-Dinitrotoluene ND 0.696 2 10/13/2022 15:56 WG1940134 2,6-Dinitrotoluene ND 0.696 2 10/13/2022 15:56 WG1940134 Fluoranthene ND 0.0696 2 10/13/2022 15:56 WG1940134
Fluorene ND 0.0696 2 10/13/2022 15:56 WG1940134
Hexachlorobenzene ND 0.696 2 10/13/2022 15:56 WG1940134 Hexachloro-1,3-butadiene ND 0.696 2 10/13/2022 15:56 WG1940134 Hexachlorocyclopentadiene ND 0.696 2 10/13/2022 15:56 WG1940134 Hexachloroethane ND 0.696 2 10/13/2022 15:56 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0696 2 10/13/2022 15:56 WG1940134 Isophorone ND 0.696 2 10/13/2022 15:56 WG1940134
Naphthalene ND 0.0696 2 10/13/2022 15:56 WG1940134
Nitrobenzene ND 0.696 2 10/13/2022 15:56 WG1940134
n-Nitrosodimethylamine ND 0.696 2 10/13/2022 15:56 WG1940134 n-Nitrosodiphenylamine ND 0.696 2 10/13/2022 15:56 WG1940134 n-Nitrosodi-n-propylamine ND 0.696 2 10/13/2022 15:56 WG1940134 Phenanthrene ND 0.0696 2 10/13/2022 15:56 WG1940134
Pyridine ND 0.696 2 10/13/2022 15:56 WG1940134
Benzylbutyl phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Di-n-butyl phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Diethyl phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Dimethyl phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Di-n-octyl phthalate ND 0.696 2 10/13/2022 15:56 WG1940134 Pyrene ND 0.0696 2 10/13/2022 15:56 WG1940134
1,2,4-Trichlorobenzene ND 0.696 2 10/13/2022 15:56 WG1940134 4-Chloro-3-methylphenol ND 0.696 2 10/13/2022 15:56 WG1940134 2-Chlorophenol ND 0.696 2 10/13/2022 15:56 WG1940134
2,4-Dichlorophenol ND 0.696 2 10/13/2022 15:56 WG1940134 2,4-Dimethylphenol ND 0.696 2 10/13/2022 15:56 WG1940134 4,6-Dinitro-2-methylphenol ND 0.696 2 10/13/2022 15:56 WG1940134 2,4-Dinitrophenol ND 0.696 2 10/13/2022 15:56 WG1940134 2-Methylphenol ND 0.696 2 10/13/2022 15:56 WG1940134
3&4-Methyl Phenol ND 0.696 2 10/13/2022 15:56 WG1940134 2-Nitrophenol ND 0.696 2 10/13/2022 15:56 WG1940134
4-Nitrophenol ND 0.696 2 10/13/2022 15:56 WG1940134
Pentachlorophenol ND 0.696 2 10/13/2022 15:56 WG1940134 Phenol ND 0.696 2 10/13/2022 15:56 WG1940134
2,4,6-Trichlorophenol ND 0.696 2 10/13/2022 15:56 WG1940134 2,4,5-Trichlorophenol ND 0.696 2 10/13/2022 15:56 WG1940134 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-015 L1543130 10/23/22 19:33 10 of 53 SAMPLE RESULTS - 01
L1543130
SB-3-1
Collected date/time: 10/04/22 09:00
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
(S) 2-Fluorophenol 70.8 12.0-120 10/13/2022 15:56 WG1940134 (S) Phenol-d5 62.0 10.0-120 10/13/2022 15:56 WG1940134
(S) Nitrobenzene-d5 56.2 10.0-122 10/13/2022 15:56 WG1940134 (S) 2-Fluorobiphenyl 70.7 15.0-120 10/13/2022 15:56 WG1940134 (S) 2,4,6-Tribromophenol 87.1 10.0-127 10/13/2022 15:56 WG1940134 (S) p-Terphenyl-d14 77.9 10.0-120 10/13/2022 15:56 WG1940134 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-015 L1543130 10/23/22 19:33 11 of 53 SAMPLE RESULTS - 02
L1543130
SB-3-5
Collected date/time: 10/04/22 09:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 93.4 1 10/06/2022 13:08 WG1938060
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0745 0.0357 .833 10/11/2022 13:04 WG1939780
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.21 5 10/23/2022 13:05 WG1943190
Arsenic 5.28 1.07 5 10/23/2022 13:05 WG1943190
Barium 246 2.68 5 10/23/2022 13:05 WG1943190
Beryllium ND 2.68 5 10/23/2022 13:05 WG1943190
Cadmium ND 1.07 5 10/23/2022 13:05 WG1943190
Chromium 86.3 5.36 5 10/23/2022 13:05 WG1943190
Cobalt 18.9 1.07 5 10/23/2022 13:05 WG1943190
Copper 36.5 5.36 5 10/23/2022 13:05 WG1943190
Lead 8.03 2.14 5 10/23/2022 13:05 WG1943190
Molybdenum ND 2.68 5 10/23/2022 13:05 WG1943190
Nickel 89.7 2.68 5 10/23/2022 13:05 WG1943190
Selenium ND 2.68 5 10/23/2022 13:05 WG1943190
Silver ND 0.536 5 10/23/2022 13:05 WG1943190
Thallium ND 2.14 5 10/23/2022 13:05 WG1943190
Vanadium 92.6 2.68 5 10/23/2022 13:05 WG1943190
Zinc 70.0 26.8 5 10/23/2022 13:05 WG1943190
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 10/17/2022 14:43 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 93.7 77.0-120 10/17/2022 14:43 WG1944061 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 J3 J4 0.0573 1 10/08/2022 22:40 WG1939614
Acrylonitrile ND 0.0143 1 10/08/2022 22:40 WG1939614
Benzene ND 0.00115 1 10/08/2022 22:40 WG1939614
Bromobenzene ND 0.0143 1 10/08/2022 22:40 WG1939614
Bromodichloromethane ND 0.00286 1 10/08/2022 22:40 WG1939614 Bromoform ND 0.0286 1 10/08/2022 22:40 WG1939614
Bromomethane ND 0.0143 1 10/08/2022 22:40 WG1939614
n-Butylbenzene ND 0.0143 1 10/08/2022 22:40 WG1939614
sec-Butylbenzene ND 0.0143 1 10/08/2022 22:40 WG1939614 tert-Butylbenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 Carbon tetrachloride ND 0.00573 1 10/08/2022 22:40 WG1939614 Chlorobenzene ND 0.00286 1 10/08/2022 22:40 WG1939614
Chlorodibromomethane ND 0.00286 1 10/08/2022 22:40 WG1939614 Chloroethane ND 0.00573 1 10/08/2022 22:40 WG1939614
Chloroform ND 0.00286 1 10/08/2022 22:40 WG1939614
Chloromethane ND 0.0143 1 10/08/2022 22:40 WG1939614
2-Chlorotoluene ND 0.00286 1 10/08/2022 22:40 WG1939614 4-Chlorotoluene ND 0.00573 1 10/08/2022 22:40 WG1939614 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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L1543130
SB-3-5
Collected date/time: 10/04/22 09:15
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 0.0286 1 10/08/2022 22:40 WG1939614 1,2-Dibromoethane ND 0.00286 1 10/08/2022 22:40 WG1939614 Dibromomethane ND 0.00573 1 10/08/2022 22:40 WG1939614
1,2-Dichlorobenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 1,3-Dichlorobenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 1,4-Dichlorobenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 Dichlorodifluoromethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,1-Dichloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,2-Dichloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,1-Dichloroethene ND 0.00286 1 10/08/2022 22:40 WG1939614 cis-1,2-Dichloroethene ND 0.00286 1 10/08/2022 22:40 WG1939614 trans-1,2-Dichloroethene ND 0.00573 1 10/08/2022 22:40 WG1939614 1,2-Dichloropropane ND 0.00573 1 10/08/2022 22:40 WG1939614 1,1-Dichloropropene ND 0.00286 1 10/08/2022 22:40 WG1939614 1,3-Dichloropropane ND 0.00573 1 10/08/2022 22:40 WG1939614 cis-1,3-Dichloropropene ND 0.00286 1 10/08/2022 22:40 WG1939614 trans-1,3-Dichloropropene ND 0.00573 1 10/08/2022 22:40 WG1939614 2,2-Dichloropropane ND 0.00286 1 10/08/2022 22:40 WG1939614 Di-isopropyl ether ND 0.00115 1 10/08/2022 22:40 WG1939614 Ethylbenzene ND 0.00286 1 10/08/2022 22:40 WG1939614
Hexachloro-1,3-butadiene ND 0.0286 1 10/08/2022 22:40 WG1939614 Isopropylbenzene ND 0.00286 1 10/08/2022 22:40 WG1939614 p-Isopropyltoluene ND 0.00573 1 10/08/2022 22:40 WG1939614 2-Butanone (MEK) ND 0.115 1 10/08/2022 22:40 WG1939614
Methylene Chloride 0.428 0.0286 1 10/08/2022 22:40 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0286 1 10/08/2022 22:40 WG1939614 Methyl tert-butyl ether ND 0.00115 1 10/08/2022 22:40 WG1939614 Naphthalene ND 0.0143 1 10/08/2022 22:40 WG1939614
n-Propylbenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 Styrene ND 0.0143 1 10/08/2022 22:40 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 Tetrachloroethene ND 0.00286 1 10/08/2022 22:40 WG1939614 Toluene 0.0109 0.00573 1 10/08/2022 22:40 WG1939614
1,2,3-Trichlorobenzene ND 0.0143 1 10/08/2022 22:40 WG1939614 1,2,4-Trichlorobenzene ND 0.0143 1 10/08/2022 22:40 WG1939614 1,1,1-Trichloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,1,2-Trichloroethane ND 0.00286 1 10/08/2022 22:40 WG1939614 Trichloroethene ND 0.00115 1 10/08/2022 22:40 WG1939614 Trichlorofluoromethane ND 0.00286 1 10/08/2022 22:40 WG1939614 1,2,3-Trichloropropane ND 0.0143 1 10/08/2022 22:40 WG1939614 1,2,4-Trimethylbenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 1,2,3-Trimethylbenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 1,3,5-Trimethylbenzene ND 0.00573 1 10/08/2022 22:40 WG1939614 Vinyl chloride ND 0.00286 1 10/08/2022 22:40 WG1939614
Xylenes, Total ND 0.00744 1 10/08/2022 22:40 WG1939614
(S) Toluene-d8 102 75.0-131 10/08/2022 22:40 WG1939614
(S) 4-Bromofluorobenzene 95.7 67.0-138 10/08/2022 22:40 WG1939614 (S) 1,2-Dichloroethane-d4 86.1 70.0-130 10/08/2022 22:40 WG1939614 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-015 L1543130 10/23/22 19:33 13 of 53 SAMPLE RESULTS - 02
L1543130
SB-3-5
Collected date/time: 10/04/22 09:15
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 ND 21.4 5 10/10/2022 18:48 WG1939937 C22-C32 Hydrocarbons 47.0 21.4 5 10/10/2022 18:48 WG1939937 C32-C40 Hydrocarbons 86.6 21.4 5 10/10/2022 18:48 WG1939937 (S) o-Terphenyl 56.4 18.0-148 10/10/2022 18:48 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0214 1 10/12/2022 01:40 WG1940120
Alpha BHC ND 0.0214 1 10/12/2022 01:40 WG1940120
Beta BHC ND 0.0214 1 10/12/2022 01:40 WG1940120
Delta BHC ND 0.0214 1 10/12/2022 01:40 WG1940120
Gamma BHC ND 0.0214 1 10/12/2022 01:40 WG1940120
Chlordane ND 0.321 1 10/12/2022 01:40 WG1940120
4,4-DDD ND 0.0214 1 10/12/2022 01:40 WG1940120
4,4-DDE ND 0.0214 1 10/12/2022 01:40 WG1940120
4,4-DDT ND 0.0214 1 10/12/2022 01:40 WG1940120
Dieldrin ND 0.0214 1 10/12/2022 01:40 WG1940120
Endosulfan I ND 0.0214 1 10/12/2022 01:40 WG1940120
Endosulfan II ND 0.0214 1 10/12/2022 01:40 WG1940120
Endosulfan sulfate ND 0.0214 1 10/12/2022 01:40 WG1940120 Endrin ND 0.0214 1 10/12/2022 01:40 WG1940120
Endrin aldehyde ND 0.0214 1 10/12/2022 01:40 WG1940120
Endrin ketone ND 0.0214 1 10/12/2022 01:40 WG1940120
Hexachlorobenzene ND 0.0214 1 10/12/2022 01:40 WG1940120 Heptachlor ND 0.0214 1 10/12/2022 01:40 WG1940120
Heptachlor epoxide ND 0.0214 1 10/12/2022 01:40 WG1940120 Methoxychlor ND 0.0214 1 10/12/2022 01:40 WG1940120
Toxaphene ND 0.428 1 10/12/2022 01:40 WG1940120
(S) Decachlorobiphenyl 62.3 10.0-135 10/12/2022 01:40 WG1940120 (S) Tetrachloro-m-xylene 70.7 10.0-139 10/12/2022 01:40 WG1940120 Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0713 2 10/12/2022 19:22 WG1940134
Acenaphthylene ND 0.0713 2 10/12/2022 19:22 WG1940134
Anthracene ND 0.0713 2 10/12/2022 19:22 WG1940134
Benzo(a)anthracene ND 0.0713 2 10/12/2022 19:22 WG1940134 Benzo(b)fluoranthene ND 0.0713 2 10/12/2022 19:22 WG1940134 Benzo(k)fluoranthene ND 0.0713 2 10/12/2022 19:22 WG1940134 Benzo(g,h,i)perylene ND 0.0713 2 10/12/2022 19:22 WG1940134 Benzo(a)pyrene ND 0.0713 2 10/12/2022 19:22 WG1940134
Bis(2-chlorethoxy)methane ND 0.713 2 10/12/2022 19:22 WG1940134 Bis(2-chloroethyl)ether ND 0.713 2 10/12/2022 19:22 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.713 2 10/12/2022 19:22 WG1940134 4-Bromophenyl-phenylether ND 0.713 2 10/12/2022 19:22 WG1940134 2-Chloronaphthalene ND 0.0713 2 10/12/2022 19:22 WG1940134 4-Chlorophenyl-phenylether ND 0.713 2 10/12/2022 19:22 WG1940134 Chrysene ND 0.0713 2 10/12/2022 19:22 WG1940134
Dibenz(a,h)anthracene ND 0.0713 2 10/12/2022 19:22 WG1940134 3,3-Dichlorobenzidine ND 0.713 2 10/12/2022 19:22 WG1940134 2,4-Dinitrotoluene ND 0.713 2 10/12/2022 19:22 WG1940134 2,6-Dinitrotoluene ND 0.713 2 10/12/2022 19:22 WG1940134 Fluoranthene ND 0.0713 2 10/12/2022 19:22 WG1940134
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-015 L1543130 10/23/22 19:33 14 of 53 SAMPLE RESULTS - 02
L1543130
SB-3-5
Collected date/time: 10/04/22 09:15
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Fluorene ND 0.0713 2 10/12/2022 19:22 WG1940134
Hexachlorobenzene ND 0.713 2 10/12/2022 19:22 WG1940134 Hexachloro-1,3-butadiene ND 0.713 2 10/12/2022 19:22 WG1940134 Hexachlorocyclopentadiene ND 0.713 2 10/12/2022 19:22 WG1940134 Hexachloroethane ND 0.713 2 10/12/2022 19:22 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0713 2 10/12/2022 19:22 WG1940134 Isophorone ND 0.713 2 10/12/2022 19:22 WG1940134
Naphthalene ND 0.0713 2 10/12/2022 19:22 WG1940134
Nitrobenzene ND 0.713 2 10/12/2022 19:22 WG1940134
n-Nitrosodimethylamine ND 0.713 2 10/12/2022 19:22 WG1940134 n-Nitrosodiphenylamine ND 0.713 2 10/12/2022 19:22 WG1940134 n-Nitrosodi-n-propylamine ND 0.713 2 10/12/2022 19:22 WG1940134 Phenanthrene ND 0.0713 2 10/12/2022 19:22 WG1940134
Pyridine ND 0.713 2 10/12/2022 19:22 WG1940134
Benzylbutyl phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Di-n-butyl phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Diethyl phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Dimethyl phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Di-n-octyl phthalate ND 0.713 2 10/12/2022 19:22 WG1940134 Pyrene ND 0.0713 2 10/12/2022 19:22 WG1940134
1,2,4-Trichlorobenzene ND 0.713 2 10/12/2022 19:22 WG1940134 4-Chloro-3-methylphenol ND 0.713 2 10/12/2022 19:22 WG1940134 2-Chlorophenol ND 0.713 2 10/12/2022 19:22 WG1940134
2,4-Dichlorophenol ND 0.713 2 10/12/2022 19:22 WG1940134 2,4-Dimethylphenol ND 0.713 2 10/12/2022 19:22 WG1940134 4,6-Dinitro-2-methylphenol ND 0.713 2 10/12/2022 19:22 WG1940134 2,4-Dinitrophenol ND 0.713 2 10/12/2022 19:22 WG1940134 2-Methylphenol ND 0.713 2 10/12/2022 19:22 WG1940134
3&4-Methyl Phenol ND 0.713 2 10/12/2022 19:22 WG1940134 2-Nitrophenol ND 0.713 2 10/12/2022 19:22 WG1940134
4-Nitrophenol ND 0.713 2 10/12/2022 19:22 WG1940134
Pentachlorophenol ND 0.713 2 10/12/2022 19:22 WG1940134 Phenol ND 0.713 2 10/12/2022 19:22 WG1940134
2,4,6-Trichlorophenol ND 0.713 2 10/12/2022 19:22 WG1940134 2,4,5-Trichlorophenol ND 0.713 2 10/12/2022 19:22 WG1940134 (S) 2-Fluorophenol 61.2 12.0-120 10/12/2022 19:22 WG1940134 (S) Phenol-d5 55.1 10.0-120 10/12/2022 19:22 WG1940134
(S) Nitrobenzene-d5 54.5 10.0-122 10/12/2022 19:22 WG1940134 (S) 2-Fluorobiphenyl 60.7 15.0-120 10/12/2022 19:22 WG1940134 (S) 2,4,6-Tribromophenol 74.4 10.0-127 10/12/2022 19:22 WG1940134 (S) p-Terphenyl-d14 66.7 10.0-120 10/12/2022 19:22 WG1940134 Sample Narrative:

L1543130-02 WG1940134: Dilution due to matrix impact during extraction procedure 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-015 L1543130 10/23/22 19:33 15 of 53 SAMPLE RESULTS - 03
L1543130
SB-3-10
Collected date/time: 10/04/22 09:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 86.2 1 10/06/2022 13:08 WG1938060
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 3.37 25 10/17/2022 15:03 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 94.6 77.0-120 10/17/2022 15:03 WG1944061 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 J3 J4 0.0673 1 10/08/2022 23:00 WG1939614
Acrylonitrile ND 0.0168 1 10/08/2022 23:00 WG1939614
Benzene ND 0.00135 1 10/08/2022 23:00 WG1939614
Bromobenzene ND 0.0168 1 10/08/2022 23:00 WG1939614
Bromodichloromethane ND 0.00337 1 10/08/2022 23:00 WG1939614 Bromoform ND 0.0337 1 10/08/2022 23:00 WG1939614
Bromomethane ND 0.0168 1 10/08/2022 23:00 WG1939614
n-Butylbenzene ND 0.0168 1 10/08/2022 23:00 WG1939614
sec-Butylbenzene ND 0.0168 1 10/08/2022 23:00 WG1939614 tert-Butylbenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 Carbon tetrachloride ND 0.00673 1 10/08/2022 23:00 WG1939614 Chlorobenzene ND 0.00337 1 10/08/2022 23:00 WG1939614
Chlorodibromomethane ND 0.00337 1 10/08/2022 23:00 WG1939614 Chloroethane ND 0.00673 1 10/08/2022 23:00 WG1939614
Chloroform ND 0.00337 1 10/08/2022 23:00 WG1939614
Chloromethane ND 0.0168 1 10/08/2022 23:00 WG1939614
2-Chlorotoluene ND 0.00337 1 10/08/2022 23:00 WG1939614 4-Chlorotoluene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,2-Dibromo-3-Chloropropane ND 0.0337 1 10/08/2022 23:00 WG1939614 1,2-Dibromoethane ND 0.00337 1 10/08/2022 23:00 WG1939614 Dibromomethane ND 0.00673 1 10/08/2022 23:00 WG1939614
1,2-Dichlorobenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,3-Dichlorobenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,4-Dichlorobenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 Dichlorodifluoromethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,1-Dichloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,2-Dichloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,1-Dichloroethene ND 0.00337 1 10/08/2022 23:00 WG1939614 cis-1,2-Dichloroethene ND 0.00337 1 10/08/2022 23:00 WG1939614 trans-1,2-Dichloroethene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,2-Dichloropropane ND 0.00673 1 10/08/2022 23:00 WG1939614 1,1-Dichloropropene ND 0.00337 1 10/08/2022 23:00 WG1939614 1,3-Dichloropropane ND 0.00673 1 10/08/2022 23:00 WG1939614 cis-1,3-Dichloropropene ND 0.00337 1 10/08/2022 23:00 WG1939614 trans-1,3-Dichloropropene ND 0.00673 1 10/08/2022 23:00 WG1939614 2,2-Dichloropropane ND 0.00337 1 10/08/2022 23:00 WG1939614 Di-isopropyl ether ND 0.00135 1 10/08/2022 23:00 WG1939614 Ethylbenzene ND 0.00337 1 10/08/2022 23:00 WG1939614
Hexachloro-1,3-butadiene ND 0.0337 1 10/08/2022 23:00 WG1939614 Isopropylbenzene ND 0.00337 1 10/08/2022 23:00 WG1939614 p-Isopropyltoluene ND 0.00673 1 10/08/2022 23:00 WG1939614 2-Butanone (MEK) ND 0.135 1 10/08/2022 23:00 WG1939614
Methylene Chloride 0.254 0.0337 1 10/08/2022 23:00 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0337 1 10/08/2022 23:00 WG1939614 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-015 L1543130 10/23/22 19:33 16 of 53 SAMPLE RESULTS - 03
L1543130
SB-3-10
Collected date/time: 10/04/22 09:30
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 0.00135 1 10/08/2022 23:00 WG1939614 Naphthalene ND 0.0168 1 10/08/2022 23:00 WG1939614
n-Propylbenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 Styrene ND 0.0168 1 10/08/2022 23:00 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 Tetrachloroethene ND 0.00337 1 10/08/2022 23:00 WG1939614 Toluene 0.0103 0.00673 1 10/08/2022 23:00 WG1939614
1,2,3-Trichlorobenzene ND 0.0168 1 10/08/2022 23:00 WG1939614 1,2,4-Trichlorobenzene ND 0.0168 1 10/08/2022 23:00 WG1939614 1,1,1-Trichloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,1,2-Trichloroethane ND 0.00337 1 10/08/2022 23:00 WG1939614 Trichloroethene ND 0.00135 1 10/08/2022 23:00 WG1939614 Trichlorofluoromethane ND 0.00337 1 10/08/2022 23:00 WG1939614 1,2,3-Trichloropropane ND 0.0168 1 10/08/2022 23:00 WG1939614 1,2,4-Trimethylbenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,2,3-Trimethylbenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 1,3,5-Trimethylbenzene ND 0.00673 1 10/08/2022 23:00 WG1939614 Vinyl chloride ND 0.00337 1 10/08/2022 23:00 WG1939614
Xylenes, Total ND 0.00875 1 10/08/2022 23:00 WG1939614
(S) Toluene-d8 104 75.0-131 10/08/2022 23:00 WG1939614
(S) 4-Bromofluorobenzene 95.6 67.0-138 10/08/2022 23:00 WG1939614 (S) 1,2-Dichloroethane-d4 86.8 70.0-130 10/08/2022 23:00 WG1939614 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 4.64 1 10/10/2022 15:34 WG1939937 C22-C32 Hydrocarbons ND 4.64 1 10/10/2022 15:34 WG1939937 C32-C40 Hydrocarbons ND 4.64 1 10/10/2022 15:34 WG1939937 (S) o-Terphenyl 41.5 18.0-148 10/10/2022 15:34 WG1939937 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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L1543130
SB-3-15
Collected date/time: 10/04/22 09:45
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 86.2 1 10/06/2022 13:08 WG1938060
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 3.41 25 10/17/2022 15:24 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 93.4 77.0-120 10/17/2022 15:24 WG1944061 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 J3 J4 0.0681 1 10/08/2022 23:19 WG1939614
Acrylonitrile ND 0.0170 1 10/08/2022 23:19 WG1939614
Benzene ND 0.00136 1 10/08/2022 23:19 WG1939614
Bromobenzene ND 0.0170 1 10/08/2022 23:19 WG1939614
Bromodichloromethane ND 0.00341 1 10/08/2022 23:19 WG1939614 Bromoform ND 0.0341 1 10/08/2022 23:19 WG1939614
Bromomethane ND 0.0170 1 10/08/2022 23:19 WG1939614
n-Butylbenzene ND 0.0170 1 10/08/2022 23:19 WG1939614
sec-Butylbenzene ND 0.0170 1 10/08/2022 23:19 WG1939614 tert-Butylbenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 Carbon tetrachloride ND 0.00681 1 10/08/2022 23:19 WG1939614 Chlorobenzene ND 0.00341 1 10/08/2022 23:19 WG1939614
Chlorodibromomethane ND 0.00341 1 10/08/2022 23:19 WG1939614 Chloroethane ND 0.00681 1 10/08/2022 23:19 WG1939614
Chloroform ND 0.00341 1 10/08/2022 23:19 WG1939614
Chloromethane ND 0.0170 1 10/08/2022 23:19 WG1939614
2-Chlorotoluene ND 0.00341 1 10/08/2022 23:19 WG1939614 4-Chlorotoluene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,2-Dibromo-3-Chloropropane ND 0.0341 1 10/08/2022 23:19 WG1939614 1,2-Dibromoethane ND 0.00341 1 10/08/2022 23:19 WG1939614 Dibromomethane ND 0.00681 1 10/08/2022 23:19 WG1939614
1,2-Dichlorobenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,3-Dichlorobenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,4-Dichlorobenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 Dichlorodifluoromethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,1-Dichloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,2-Dichloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,1-Dichloroethene ND 0.00341 1 10/08/2022 23:19 WG1939614 cis-1,2-Dichloroethene ND 0.00341 1 10/08/2022 23:19 WG1939614 trans-1,2-Dichloroethene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,2-Dichloropropane ND 0.00681 1 10/08/2022 23:19 WG1939614 1,1-Dichloropropene ND 0.00341 1 10/08/2022 23:19 WG1939614 1,3-Dichloropropane ND 0.00681 1 10/08/2022 23:19 WG1939614 cis-1,3-Dichloropropene ND 0.00341 1 10/08/2022 23:19 WG1939614 trans-1,3-Dichloropropene ND 0.00681 1 10/08/2022 23:19 WG1939614 2,2-Dichloropropane ND 0.00341 1 10/08/2022 23:19 WG1939614 Di-isopropyl ether ND 0.00136 1 10/08/2022 23:19 WG1939614 Ethylbenzene ND 0.00341 1 10/08/2022 23:19 WG1939614
Hexachloro-1,3-butadiene ND 0.0341 1 10/08/2022 23:19 WG1939614 Isopropylbenzene ND 0.00341 1 10/08/2022 23:19 WG1939614 p-Isopropyltoluene ND 0.00681 1 10/08/2022 23:19 WG1939614 2-Butanone (MEK) ND 0.136 1 10/08/2022 23:19 WG1939614
Methylene Chloride 0.503 0.0341 1 10/08/2022 23:19 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0341 1 10/08/2022 23:19 WG1939614 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-015 L1543130 10/23/22 19:33 18 of 53 SAMPLE RESULTS - 04
L1543130
SB-3-15
Collected date/time: 10/04/22 09:45
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 0.00136 1 10/08/2022 23:19 WG1939614 Naphthalene ND 0.0170 1 10/08/2022 23:19 WG1939614
n-Propylbenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 Styrene ND 0.0170 1 10/08/2022 23:19 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 Tetrachloroethene ND 0.00341 1 10/08/2022 23:19 WG1939614 Toluene 0.0133 0.00681 1 10/08/2022 23:19 WG1939614
1,2,3-Trichlorobenzene ND 0.0170 1 10/08/2022 23:19 WG1939614 1,2,4-Trichlorobenzene ND 0.0170 1 10/08/2022 23:19 WG1939614 1,1,1-Trichloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,1,2-Trichloroethane ND 0.00341 1 10/08/2022 23:19 WG1939614 Trichloroethene ND 0.00136 1 10/08/2022 23:19 WG1939614 Trichlorofluoromethane ND 0.00341 1 10/08/2022 23:19 WG1939614 1,2,3-Trichloropropane ND 0.0170 1 10/08/2022 23:19 WG1939614 1,2,4-Trimethylbenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,2,3-Trimethylbenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 1,3,5-Trimethylbenzene ND 0.00681 1 10/08/2022 23:19 WG1939614 Vinyl chloride ND 0.00341 1 10/08/2022 23:19 WG1939614
Xylenes, Total ND 0.00886 1 10/08/2022 23:19 WG1939614
(S) Toluene-d8 104 75.0-131 10/08/2022 23:19 WG1939614
(S) 4-Bromofluorobenzene 95.7 67.0-138 10/08/2022 23:19 WG1939614 (S) 1,2-Dichloroethane-d4 85.7 70.0-130 10/08/2022 23:19 WG1939614 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 4.64 1 10/10/2022 14:55 WG1939937 C22-C32 Hydrocarbons ND 4.64 1 10/10/2022 14:55 WG1939937 C32-C40 Hydrocarbons ND 4.64 1 10/10/2022 14:55 WG1939937 (S) o-Terphenyl 43.9 18.0-148 10/10/2022 14:55 WG1939937 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-015 L1543130 10/23/22 19:33 19 of 53 SAMPLE RESULTS - 05
L1543130
SB-4-1
Collected date/time: 10/04/22 11:30
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.8 1 10/06/2022 13:08 WG1938060
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0779 J5 O1 0.0431 1 10/11/2022 11:55 WG1939780 Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.23 5 10/23/2022 13:08 WG1943190
Arsenic 3.82 1.08 5 10/23/2022 13:08 WG1943190
Barium 498 2.69 5 10/23/2022 13:08 WG1943190
Beryllium ND 2.69 5 10/23/2022 13:08 WG1943190
Cadmium ND 1.08 5 10/23/2022 13:08 WG1943190
Chromium 64.3 5.39 5 10/23/2022 13:08 WG1943190
Cobalt 13.8 1.08 5 10/23/2022 13:08 WG1943190
Copper 29.2 5.39 5 10/23/2022 13:08 WG1943190
Lead 6.01 2.15 5 10/23/2022 13:08 WG1943190
Molybdenum ND 2.69 5 10/23/2022 13:08 WG1943190
Nickel 73.4 2.69 5 10/23/2022 13:08 WG1943190
Selenium ND 2.69 5 10/23/2022 13:08 WG1943190
Silver ND 0.539 5 10/23/2022 13:08 WG1943190
Thallium ND 2.15 5 10/23/2022 13:08 WG1943190
Vanadium 62.9 2.69 5 10/23/2022 13:08 WG1943190
Zinc 54.6 26.9 5 10/23/2022 13:08 WG1943190
Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0215 1 10/12/2022 14:45 WG1940661
Alpha BHC ND 0.0215 1 10/12/2022 14:45 WG1940661
Beta BHC ND 0.0215 1 10/12/2022 14:45 WG1940661
Delta BHC ND 0.0215 1 10/12/2022 14:45 WG1940661
Gamma BHC ND 0.0215 1 10/12/2022 14:45 WG1940661
Chlordane ND 0.323 1 10/12/2022 14:45 WG1940661
4,4-DDD ND 0.0215 1 10/12/2022 14:45 WG1940661
4,4-DDE 0.0754 P 0.0215 1 10/12/2022 14:45 WG1940661
4,4-DDT ND 0.0215 1 10/12/2022 14:45 WG1940661
Dieldrin 0.0515 0.0215 1 10/12/2022 14:45 WG1940661
Endosulfan I ND 0.0215 1 10/12/2022 14:45 WG1940661
Endosulfan II ND 0.0215 1 10/12/2022 14:45 WG1940661
Endosulfan sulfate ND 0.0215 1 10/12/2022 14:45 WG1940661 Endrin ND 0.0215 1 10/12/2022 14:45 WG1940661
Endrin aldehyde ND 0.0215 1 10/12/2022 14:45 WG1940661
Endrin ketone ND 0.0215 1 10/12/2022 14:45 WG1940661
Hexachlorobenzene ND 0.0215 1 10/12/2022 14:45 WG1940661 Heptachlor ND 0.0215 1 10/12/2022 14:45 WG1940661
Heptachlor epoxide ND 0.0215 1 10/12/2022 14:45 WG1940661 Methoxychlor ND 0.0215 1 10/12/2022 14:45 WG1940661
Toxaphene ND 0.431 1 10/12/2022 14:45 WG1940661
(S) Decachlorobiphenyl 80.1 10.0-135 10/12/2022 14:45 WG1940661 (S) Tetrachloro-m-xylene 59.6 10.0-139 10/12/2022 14:45 WG1940661 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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L1543130
SB-4-1
Collected date/time: 10/04/22 11:30
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.359 10 10/12/2022 20:04 WG1940134
Acenaphthylene ND 0.359 10 10/12/2022 20:04 WG1940134
Anthracene ND 0.359 10 10/12/2022 20:04 WG1940134
Benzo(a)anthracene ND 0.359 10 10/12/2022 20:04 WG1940134 Benzo(b)fluoranthene ND 0.359 10 10/12/2022 20:04 WG1940134 Benzo(k)fluoranthene ND 0.359 10 10/12/2022 20:04 WG1940134 Benzo(g,h,i)perylene ND 0.359 10 10/12/2022 20:04 WG1940134 Benzo(a)pyrene ND 0.359 10 10/12/2022 20:04 WG1940134
Bis(2-chlorethoxy)methane ND 3.59 10 10/12/2022 20:04 WG1940134 Bis(2-chloroethyl)ether ND 3.59 10 10/12/2022 20:04 WG1940134 2,2-Oxybis(1-Chloropropane) ND 3.59 10 10/12/2022 20:04 WG1940134 4-Bromophenyl-phenylether ND 3.59 10 10/12/2022 20:04 WG1940134 2-Chloronaphthalene ND 0.359 10 10/12/2022 20:04 WG1940134 4-Chlorophenyl-phenylether ND 3.59 10 10/12/2022 20:04 WG1940134 Chrysene ND 0.359 10 10/12/2022 20:04 WG1940134
Dibenz(a,h)anthracene ND 0.359 10 10/12/2022 20:04 WG1940134 3,3-Dichlorobenzidine ND 3.59 10 10/12/2022 20:04 WG1940134 2,4-Dinitrotoluene ND 3.59 10 10/12/2022 20:04 WG1940134 2,6-Dinitrotoluene ND 3.59 10 10/12/2022 20:04 WG1940134 Fluoranthene ND 0.359 10 10/12/2022 20:04 WG1940134
Fluorene ND 0.359 10 10/12/2022 20:04 WG1940134
Hexachlorobenzene ND 3.59 10 10/12/2022 20:04 WG1940134 Hexachloro-1,3-butadiene ND 3.59 10 10/12/2022 20:04 WG1940134 Hexachlorocyclopentadiene ND 3.59 10 10/12/2022 20:04 WG1940134 Hexachloroethane ND 3.59 10 10/12/2022 20:04 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.359 10 10/12/2022 20:04 WG1940134 Isophorone ND 3.59 10 10/12/2022 20:04 WG1940134
Naphthalene ND 0.359 10 10/12/2022 20:04 WG1940134
Nitrobenzene ND 3.59 10 10/12/2022 20:04 WG1940134
n-Nitrosodimethylamine ND 3.59 10 10/12/2022 20:04 WG1940134 n-Nitrosodiphenylamine ND 3.59 10 10/12/2022 20:04 WG1940134 n-Nitrosodi-n-propylamine ND 3.59 10 10/12/2022 20:04 WG1940134 Phenanthrene ND 0.359 10 10/12/2022 20:04 WG1940134
Pyridine ND 3.59 10 10/12/2022 20:04 WG1940134
Benzylbutyl phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Bis(2-ethylhexyl)phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Di-n-butyl phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Diethyl phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Dimethyl phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Di-n-octyl phthalate ND 3.59 10 10/12/2022 20:04 WG1940134 Pyrene ND 0.359 10 10/12/2022 20:04 WG1940134
1,2,4-Trichlorobenzene ND 3.59 10 10/12/2022 20:04 WG1940134 4-Chloro-3-methylphenol ND 3.59 10 10/12/2022 20:04 WG1940134 2-Chlorophenol ND 3.59 10 10/12/2022 20:04 WG1940134
2,4-Dichlorophenol ND 3.59 10 10/12/2022 20:04 WG1940134 2,4-Dimethylphenol ND 3.59 10 10/12/2022 20:04 WG1940134 4,6-Dinitro-2-methylphenol ND 3.59 10 10/12/2022 20:04 WG1940134 2,4-Dinitrophenol ND 3.59 10 10/12/2022 20:04 WG1940134 2-Methylphenol ND 3.59 10 10/12/2022 20:04 WG1940134
3&4-Methyl Phenol ND 3.59 10 10/12/2022 20:04 WG1940134 2-Nitrophenol ND 3.59 10 10/12/2022 20:04 WG1940134
4-Nitrophenol ND 3.59 10 10/12/2022 20:04 WG1940134
Pentachlorophenol ND 3.59 10 10/12/2022 20:04 WG1940134 Phenol ND 3.59 10 10/12/2022 20:04 WG1940134
2,4,6-Trichlorophenol ND 3.59 10 10/12/2022 20:04 WG1940134 2,4,5-Trichlorophenol ND 3.59 10 10/12/2022 20:04 WG1940134 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-015 L1543130 10/23/22 19:33 21 of 53 SAMPLE RESULTS - 05
L1543130
SB-4-1
Collected date/time: 10/04/22 11:30
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
(S) 2-Fluorophenol 59.9 12.0-120 10/12/2022 20:04 WG1940134 (S) Phenol-d5 52.4 10.0-120 10/12/2022 20:04 WG1940134
(S) Nitrobenzene-d5 46.5 10.0-122 10/12/2022 20:04 WG1940134 (S) 2-Fluorobiphenyl 68.5 15.0-120 10/12/2022 20:04 WG1940134 (S) 2,4,6-Tribromophenol 70.3 10.0-127 10/12/2022 20:04 WG1940134 (S) p-Terphenyl-d14 66.4 10.0-120 10/12/2022 20:04 WG1940134 Sample Narrative:

L1543130-05 WG1940134: Dilution due to matrix impact during extraction procedure 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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L1543130
SB-4-5
Collected date/time: 10/04/22 11:45
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 92.6 1 10/06/2022 13:08 WG1938060
Mercury by Method 7471A
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Mercury 0.0706 0.0432 1 10/12/2022 10:15 WG1940588
Metals (ICPMS) by Method 6020
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Antimony ND 3.24 5 10/23/2022 13:12 WG1943190
Arsenic 3.54 1.08 5 10/23/2022 13:12 WG1943190
Barium 136 2.70 5 10/23/2022 13:12 WG1943190
Beryllium ND 2.70 5 10/23/2022 13:12 WG1943190
Cadmium ND 1.08 5 10/23/2022 13:12 WG1943190
Chromium 63.6 5.40 5 10/23/2022 13:12 WG1943190
Cobalt 14.5 1.08 5 10/23/2022 13:12 WG1943190
Copper 25.6 5.40 5 10/23/2022 13:12 WG1943190
Lead 5.44 2.16 5 10/23/2022 13:12 WG1943190
Molybdenum ND 2.70 5 10/23/2022 13:12 WG1943190
Nickel 85.5 2.70 5 10/23/2022 13:12 WG1943190
Selenium ND 2.70 5 10/23/2022 13:12 WG1943190
Silver ND 0.540 5 10/23/2022 13:12 WG1943190
Thallium ND 2.16 5 10/23/2022 13:12 WG1943190
Vanadium 59.2 2.70 5 10/23/2022 13:12 WG1943190
Zinc 47.4 27.0 5 10/23/2022 13:12 WG1943190
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 2.92 25 10/17/2022 15:44 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 93.8 77.0-120 10/17/2022 15:44 WG1944061 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 J3 J4 0.0583 1 10/08/2022 23:38 WG1939614
Acrylonitrile ND 0.0146 1 10/08/2022 23:38 WG1939614
Benzene ND 0.00117 1 10/08/2022 23:38 WG1939614
Bromobenzene ND 0.0146 1 10/08/2022 23:38 WG1939614
Bromodichloromethane ND 0.00292 1 10/08/2022 23:38 WG1939614 Bromoform ND 0.0292 1 10/08/2022 23:38 WG1939614
Bromomethane ND 0.0146 1 10/08/2022 23:38 WG1939614
n-Butylbenzene ND 0.0146 1 10/08/2022 23:38 WG1939614
sec-Butylbenzene ND 0.0146 1 10/08/2022 23:38 WG1939614 tert-Butylbenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 Carbon tetrachloride ND 0.00583 1 10/08/2022 23:38 WG1939614 Chlorobenzene ND 0.00292 1 10/08/2022 23:38 WG1939614
Chlorodibromomethane ND 0.00292 1 10/08/2022 23:38 WG1939614 Chloroethane ND 0.00583 1 10/08/2022 23:38 WG1939614
Chloroform ND 0.00292 1 10/08/2022 23:38 WG1939614
Chloromethane ND 0.0146 1 10/08/2022 23:38 WG1939614
2-Chlorotoluene ND 0.00292 1 10/08/2022 23:38 WG1939614 4-Chlorotoluene ND 0.00583 1 10/08/2022 23:38 WG1939614 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-015 L1543130 10/23/22 19:33 23 of 53 SAMPLE RESULTS - 06
L1543130
SB-4-5
Collected date/time: 10/04/22 11:45
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 0.0292 1 10/08/2022 23:38 WG1939614 1,2-Dibromoethane ND 0.00292 1 10/08/2022 23:38 WG1939614 Dibromomethane ND 0.00583 1 10/08/2022 23:38 WG1939614
1,2-Dichlorobenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 1,3-Dichlorobenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 1,4-Dichlorobenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 Dichlorodifluoromethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,1-Dichloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,2-Dichloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,1-Dichloroethene ND 0.00292 1 10/08/2022 23:38 WG1939614 cis-1,2-Dichloroethene ND 0.00292 1 10/08/2022 23:38 WG1939614 trans-1,2-Dichloroethene ND 0.00583 1 10/08/2022 23:38 WG1939614 1,2-Dichloropropane ND 0.00583 1 10/08/2022 23:38 WG1939614 1,1-Dichloropropene ND 0.00292 1 10/08/2022 23:38 WG1939614 1,3-Dichloropropane ND 0.00583 1 10/08/2022 23:38 WG1939614 cis-1,3-Dichloropropene ND 0.00292 1 10/08/2022 23:38 WG1939614 trans-1,3-Dichloropropene ND 0.00583 1 10/08/2022 23:38 WG1939614 2,2-Dichloropropane ND 0.00292 1 10/08/2022 23:38 WG1939614 Di-isopropyl ether ND 0.00117 1 10/08/2022 23:38 WG1939614 Ethylbenzene ND 0.00292 1 10/08/2022 23:38 WG1939614
Hexachloro-1,3-butadiene ND 0.0292 1 10/08/2022 23:38 WG1939614 Isopropylbenzene ND 0.00292 1 10/08/2022 23:38 WG1939614 p-Isopropyltoluene ND 0.00583 1 10/08/2022 23:38 WG1939614 2-Butanone (MEK) ND 0.117 1 10/08/2022 23:38 WG1939614
Methylene Chloride 0.502 0.0292 1 10/08/2022 23:38 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0292 1 10/08/2022 23:38 WG1939614 Methyl tert-butyl ether ND 0.00117 1 10/08/2022 23:38 WG1939614 Naphthalene ND 0.0146 1 10/08/2022 23:38 WG1939614
n-Propylbenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 Styrene ND 0.0146 1 10/08/2022 23:38 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 Tetrachloroethene ND 0.00292 1 10/08/2022 23:38 WG1939614 Toluene 0.00852 0.00583 1 10/08/2022 23:38 WG1939614
1,2,3-Trichlorobenzene ND 0.0146 1 10/08/2022 23:38 WG1939614 1,2,4-Trichlorobenzene ND 0.0146 1 10/08/2022 23:38 WG1939614 1,1,1-Trichloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,1,2-Trichloroethane ND 0.00292 1 10/08/2022 23:38 WG1939614 Trichloroethene ND 0.00117 1 10/08/2022 23:38 WG1939614 Trichlorofluoromethane ND 0.00292 1 10/08/2022 23:38 WG1939614 1,2,3-Trichloropropane ND 0.0146 1 10/08/2022 23:38 WG1939614 1,2,4-Trimethylbenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 1,2,3-Trimethylbenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 1,3,5-Trimethylbenzene ND 0.00583 1 10/08/2022 23:38 WG1939614 Vinyl chloride ND 0.00292 1 10/08/2022 23:38 WG1939614
Xylenes, Total ND 0.00758 1 10/08/2022 23:38 WG1939614
(S) Toluene-d8 104 75.0-131 10/08/2022 23:38 WG1939614
(S) 4-Bromofluorobenzene 95.9 67.0-138 10/08/2022 23:38 WG1939614 (S) 1,2-Dichloroethane-d4 84.2 70.0-130 10/08/2022 23:38 WG1939614 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-015 L1543130 10/23/22 19:33 24 of 53 SAMPLE RESULTS - 06
L1543130
SB-4-5
Collected date/time: 10/04/22 11:45
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 4.32 1 10/10/2022 17:17 WG1939937 C22-C32 Hydrocarbons 9.42 4.32 1 10/10/2022 17:17 WG1939937 C32-C40 Hydrocarbons 12.8 4.32 1 10/10/2022 17:17 WG1939937 (S) o-Terphenyl 54.5 18.0-148 10/10/2022 17:17 WG1939937 Pesticides (GC) by Method 8081
Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Aldrin ND 0.0216 1 10/12/2022 14:03 WG1940661
Alpha BHC ND 0.0216 1 10/12/2022 14:03 WG1940661
Beta BHC ND 0.0216 1 10/12/2022 14:03 WG1940661
Delta BHC ND 0.0216 1 10/12/2022 14:03 WG1940661
Gamma BHC ND 0.0216 1 10/12/2022 14:03 WG1940661
Chlordane ND 0.324 1 10/12/2022 14:03 WG1940661
4,4-DDD ND 0.0216 1 10/12/2022 14:03 WG1940661
4,4-DDE ND 0.0216 1 10/12/2022 14:03 WG1940661
4,4-DDT ND 0.0216 1 10/12/2022 14:03 WG1940661
Dieldrin ND 0.0216 1 10/12/2022 14:03 WG1940661
Endosulfan I ND 0.0216 1 10/12/2022 14:03 WG1940661
Endosulfan II ND 0.0216 1 10/12/2022 14:03 WG1940661
Endosulfan sulfate ND 0.0216 1 10/12/2022 14:03 WG1940661 Endrin ND 0.0216 1 10/12/2022 14:03 WG1940661
Endrin aldehyde ND 0.0216 1 10/12/2022 14:03 WG1940661
Endrin ketone ND 0.0216 1 10/12/2022 14:03 WG1940661
Hexachlorobenzene ND 0.0216 1 10/12/2022 14:03 WG1940661 Heptachlor ND 0.0216 1 10/12/2022 14:03 WG1940661
Heptachlor epoxide ND 0.0216 1 10/12/2022 14:03 WG1940661 Methoxychlor ND 0.0216 1 10/12/2022 14:03 WG1940661
Toxaphene ND 0.432 1 10/12/2022 14:03 WG1940661
(S) Decachlorobiphenyl 65.9 10.0-135 10/12/2022 14:03 WG1940661 (S) Tetrachloro-m-xylene 48.5 10.0-139 10/12/2022 14:03 WG1940661 Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Acenaphthene ND 0.0719 2 10/12/2022 18:18 WG1940134
Acenaphthylene ND 0.0719 2 10/12/2022 18:18 WG1940134
Anthracene ND 0.0719 2 10/12/2022 18:18 WG1940134
Benzo(a)anthracene ND 0.0719 2 10/12/2022 18:18 WG1940134 Benzo(b)fluoranthene ND 0.0719 2 10/12/2022 18:18 WG1940134 Benzo(k)fluoranthene ND 0.0719 2 10/12/2022 18:18 WG1940134 Benzo(g,h,i)perylene ND 0.0719 2 10/12/2022 18:18 WG1940134 Benzo(a)pyrene ND 0.0719 2 10/12/2022 18:18 WG1940134
Bis(2-chlorethoxy)methane ND 0.719 2 10/12/2022 18:18 WG1940134 Bis(2-chloroethyl)ether ND 0.719 2 10/12/2022 18:18 WG1940134 2,2-Oxybis(1-Chloropropane) ND 0.719 2 10/12/2022 18:18 WG1940134 4-Bromophenyl-phenylether ND 0.719 2 10/12/2022 18:18 WG1940134 2-Chloronaphthalene ND 0.0719 2 10/12/2022 18:18 WG1940134 4-Chlorophenyl-phenylether ND 0.719 2 10/12/2022 18:18 WG1940134 Chrysene ND 0.0719 2 10/12/2022 18:18 WG1940134
Dibenz(a,h)anthracene ND 0.0719 2 10/12/2022 18:18 WG1940134 3,3-Dichlorobenzidine ND 0.719 2 10/12/2022 18:18 WG1940134 2,4-Dinitrotoluene ND 0.719 2 10/12/2022 18:18 WG1940134 2,6-Dinitrotoluene ND 0.719 2 10/12/2022 18:18 WG1940134 Fluoranthene ND 0.0719 2 10/12/2022 18:18 WG1940134
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-015 L1543130 10/23/22 19:33 25 of 53 SAMPLE RESULTS - 06
L1543130
SB-4-5
Collected date/time: 10/04/22 11:45
Semi Volatile Organic Compounds (GC/MS) by Method 8270C Result (dry) Qualifier RDL (dry) Dilution Analysis Batch Analyte mg/kg mg/kg date / time
Fluorene ND 0.0719 2 10/12/2022 18:18 WG1940134
Hexachlorobenzene ND 0.719 2 10/12/2022 18:18 WG1940134 Hexachloro-1,3-butadiene ND 0.719 2 10/12/2022 18:18 WG1940134 Hexachlorocyclopentadiene ND 0.719 2 10/12/2022 18:18 WG1940134 Hexachloroethane ND 0.719 2 10/12/2022 18:18 WG1940134
Indeno(1,2,3-cd)pyrene ND 0.0719 2 10/12/2022 18:18 WG1940134 Isophorone ND 0.719 2 10/12/2022 18:18 WG1940134
Naphthalene ND 0.0719 2 10/12/2022 18:18 WG1940134
Nitrobenzene ND 0.719 2 10/12/2022 18:18 WG1940134
n-Nitrosodimethylamine ND 0.719 2 10/12/2022 18:18 WG1940134 n-Nitrosodiphenylamine ND 0.719 2 10/12/2022 18:18 WG1940134 n-Nitrosodi-n-propylamine ND 0.719 2 10/12/2022 18:18 WG1940134 Phenanthrene ND 0.0719 2 10/12/2022 18:18 WG1940134
Pyridine ND 0.719 2 10/12/2022 18:18 WG1940134
Benzylbutyl phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Bis(2-ethylhexyl)phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Di-n-butyl phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Diethyl phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Dimethyl phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Di-n-octyl phthalate ND 0.719 2 10/12/2022 18:18 WG1940134 Pyrene ND 0.0719 2 10/12/2022 18:18 WG1940134
1,2,4-Trichlorobenzene ND 0.719 2 10/12/2022 18:18 WG1940134 4-Chloro-3-methylphenol ND 0.719 2 10/12/2022 18:18 WG1940134 2-Chlorophenol ND 0.719 2 10/12/2022 18:18 WG1940134
2,4-Dichlorophenol ND 0.719 2 10/12/2022 18:18 WG1940134 2,4-Dimethylphenol ND 0.719 2 10/12/2022 18:18 WG1940134 4,6-Dinitro-2-methylphenol ND 0.719 2 10/12/2022 18:18 WG1940134 2,4-Dinitrophenol ND 0.719 2 10/12/2022 18:18 WG1940134 2-Methylphenol ND 0.719 2 10/12/2022 18:18 WG1940134
3&4-Methyl Phenol ND 0.719 2 10/12/2022 18:18 WG1940134 2-Nitrophenol ND 0.719 2 10/12/2022 18:18 WG1940134
4-Nitrophenol ND 0.719 2 10/12/2022 18:18 WG1940134
Pentachlorophenol ND 0.719 2 10/12/2022 18:18 WG1940134 Phenol ND 0.719 2 10/12/2022 18:18 WG1940134
2,4,6-Trichlorophenol ND 0.719 2 10/12/2022 18:18 WG1940134 2,4,5-Trichlorophenol ND 0.719 2 10/12/2022 18:18 WG1940134 (S) 2-Fluorophenol 69.3 12.0-120 10/12/2022 18:18 WG1940134 (S) Phenol-d5 62.4 10.0-120 10/12/2022 18:18 WG1940134
(S) Nitrobenzene-d5 57.7 10.0-122 10/12/2022 18:18 WG1940134 (S) 2-Fluorobiphenyl 69.9 15.0-120 10/12/2022 18:18 WG1940134 (S) 2,4,6-Tribromophenol 84.8 10.0-127 10/12/2022 18:18 WG1940134 (S) p-Terphenyl-d14 76.4 10.0-120 10/12/2022 18:18 WG1940134 Sample Narrative:

L1543130-06 WG1940134: Dilution due to matrix impact during extraction procedure 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-015 L1543130 10/23/22 19:33 26 of 53 SAMPLE RESULTS - 07
L1543130
SB-4-10
Collected date/time: 10/04/22 12:00
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 79.8 1 10/06/2022 13:08 WG1938060
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 3.92 25 10/17/2022 16:05 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 94.0 77.0-120 10/17/2022 16:05 WG1944061 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 J3 J4 0.0785 1 10/08/2022 23:57 WG1939614
Acrylonitrile ND 0.0196 1 10/08/2022 23:57 WG1939614
Benzene ND 0.00157 1 10/08/2022 23:57 WG1939614
Bromobenzene ND 0.0196 1 10/08/2022 23:57 WG1939614
Bromodichloromethane ND 0.00392 1 10/08/2022 23:57 WG1939614 Bromoform ND 0.0392 1 10/08/2022 23:57 WG1939614
Bromomethane ND 0.0196 1 10/08/2022 23:57 WG1939614
n-Butylbenzene ND 0.0196 1 10/08/2022 23:57 WG1939614
sec-Butylbenzene ND 0.0196 1 10/08/2022 23:57 WG1939614 tert-Butylbenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 Carbon tetrachloride ND 0.00785 1 10/08/2022 23:57 WG1939614 Chlorobenzene ND 0.00392 1 10/08/2022 23:57 WG1939614
Chlorodibromomethane ND 0.00392 1 10/08/2022 23:57 WG1939614 Chloroethane ND 0.00785 1 10/08/2022 23:57 WG1939614
Chloroform ND 0.00392 1 10/08/2022 23:57 WG1939614
Chloromethane ND 0.0196 1 10/08/2022 23:57 WG1939614
2-Chlorotoluene ND 0.00392 1 10/08/2022 23:57 WG1939614 4-Chlorotoluene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,2-Dibromo-3-Chloropropane ND 0.0392 1 10/08/2022 23:57 WG1939614 1,2-Dibromoethane ND 0.00392 1 10/08/2022 23:57 WG1939614 Dibromomethane ND 0.00785 1 10/08/2022 23:57 WG1939614
1,2-Dichlorobenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,3-Dichlorobenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,4-Dichlorobenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 Dichlorodifluoromethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,1-Dichloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,2-Dichloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,1-Dichloroethene ND 0.00392 1 10/08/2022 23:57 WG1939614 cis-1,2-Dichloroethene ND 0.00392 1 10/08/2022 23:57 WG1939614 trans-1,2-Dichloroethene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,2-Dichloropropane ND 0.00785 1 10/08/2022 23:57 WG1939614 1,1-Dichloropropene ND 0.00392 1 10/08/2022 23:57 WG1939614 1,3-Dichloropropane ND 0.00785 1 10/08/2022 23:57 WG1939614 cis-1,3-Dichloropropene ND 0.00392 1 10/08/2022 23:57 WG1939614 trans-1,3-Dichloropropene ND 0.00785 1 10/08/2022 23:57 WG1939614 2,2-Dichloropropane ND 0.00392 1 10/08/2022 23:57 WG1939614 Di-isopropyl ether ND 0.00157 1 10/08/2022 23:57 WG1939614 Ethylbenzene ND 0.00392 1 10/08/2022 23:57 WG1939614
Hexachloro-1,3-butadiene ND 0.0392 1 10/08/2022 23:57 WG1939614 Isopropylbenzene ND 0.00392 1 10/08/2022 23:57 WG1939614 p-Isopropyltoluene ND 0.00785 1 10/08/2022 23:57 WG1939614 2-Butanone (MEK) ND 0.157 1 10/08/2022 23:57 WG1939614
Methylene Chloride 0.965 0.0392 1 10/08/2022 23:57 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0392 1 10/08/2022 23:57 WG1939614 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-015 L1543130 10/23/22 19:33 27 of 53 SAMPLE RESULTS - 07
L1543130
SB-4-10
Collected date/time: 10/04/22 12:00
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 0.00157 1 10/08/2022 23:57 WG1939614 Naphthalene ND 0.0196 1 10/08/2022 23:57 WG1939614
n-Propylbenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 Styrene ND 0.0196 1 10/08/2022 23:57 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 Tetrachloroethene ND 0.00392 1 10/08/2022 23:57 WG1939614 Toluene 0.0128 0.00785 1 10/08/2022 23:57 WG1939614
1,2,3-Trichlorobenzene ND 0.0196 1 10/08/2022 23:57 WG1939614 1,2,4-Trichlorobenzene ND 0.0196 1 10/08/2022 23:57 WG1939614 1,1,1-Trichloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,1,2-Trichloroethane ND 0.00392 1 10/08/2022 23:57 WG1939614 Trichloroethene ND 0.00157 1 10/08/2022 23:57 WG1939614 Trichlorofluoromethane ND 0.00392 1 10/08/2022 23:57 WG1939614 1,2,3-Trichloropropane ND 0.0196 1 10/08/2022 23:57 WG1939614 1,2,4-Trimethylbenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,2,3-Trimethylbenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 1,3,5-Trimethylbenzene ND 0.00785 1 10/08/2022 23:57 WG1939614 Vinyl chloride ND 0.00392 1 10/08/2022 23:57 WG1939614
Xylenes, Total ND 0.0102 1 10/08/2022 23:57 WG1939614
(S) Toluene-d8 107 75.0-131 10/08/2022 23:57 WG1939614
(S) 4-Bromofluorobenzene 98.8 67.0-138 10/08/2022 23:57 WG1939614 (S) 1,2-Dichloroethane-d4 86.6 70.0-130 10/08/2022 23:57 WG1939614 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 5.01 1 10/13/2022 08:34 WG1941312 C22-C32 Hydrocarbons ND 5.01 1 10/13/2022 08:34 WG1941312 C32-C40 Hydrocarbons ND 5.01 1 10/13/2022 08:34 WG1941312 (S) o-Terphenyl 49.7 18.0-148 10/13/2022 08:34 WG1941312 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-015 L1543130 10/23/22 19:33 28 of 53 SAMPLE RESULTS - 08
L1543130
SB-4-15
Collected date/time: 10/04/22 12:15
Total Solids by Method 2540 G-2011
Result Qualifier Dilution Analysis Batch
Analyte % date / time
Total Solids 82.7 1 10/06/2022 13:08 WG1938060
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 3.69 25 10/17/2022 16:25 WG1944061
(S) a,a,a-Trifluorotoluene(FID) 92.8 77.0-120 10/17/2022 16:25 WG1944061 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 J3 J4 0.0738 1 10/09/2022 00:16 WG1939614
Acrylonitrile ND 0.0184 1 10/09/2022 00:16 WG1939614
Benzene ND 0.00148 1 10/09/2022 00:16 WG1939614
Bromobenzene ND 0.0184 1 10/09/2022 00:16 WG1939614
Bromodichloromethane ND 0.00369 1 10/09/2022 00:16 WG1939614 Bromoform ND 0.0369 1 10/09/2022 00:16 WG1939614
Bromomethane ND 0.0184 1 10/09/2022 00:16 WG1939614
n-Butylbenzene ND 0.0184 1 10/09/2022 00:16 WG1939614
sec-Butylbenzene ND 0.0184 1 10/09/2022 00:16 WG1939614 tert-Butylbenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 Carbon tetrachloride ND 0.00738 1 10/09/2022 00:16 WG1939614 Chlorobenzene ND 0.00369 1 10/09/2022 00:16 WG1939614
Chlorodibromomethane ND 0.00369 1 10/09/2022 00:16 WG1939614 Chloroethane ND 0.00738 1 10/09/2022 00:16 WG1939614
Chloroform ND 0.00369 1 10/09/2022 00:16 WG1939614
Chloromethane ND 0.0184 1 10/09/2022 00:16 WG1939614
2-Chlorotoluene ND 0.00369 1 10/09/2022 00:16 WG1939614 4-Chlorotoluene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,2-Dibromo-3-Chloropropane ND 0.0369 1 10/09/2022 00:16 WG1939614 1,2-Dibromoethane ND 0.00369 1 10/09/2022 00:16 WG1939614 Dibromomethane ND 0.00738 1 10/09/2022 00:16 WG1939614
1,2-Dichlorobenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,3-Dichlorobenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,4-Dichlorobenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 Dichlorodifluoromethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,1-Dichloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,2-Dichloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,1-Dichloroethene ND 0.00369 1 10/09/2022 00:16 WG1939614 cis-1,2-Dichloroethene ND 0.00369 1 10/09/2022 00:16 WG1939614 trans-1,2-Dichloroethene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,2-Dichloropropane ND 0.00738 1 10/09/2022 00:16 WG1939614 1,1-Dichloropropene ND 0.00369 1 10/09/2022 00:16 WG1939614 1,3-Dichloropropane ND 0.00738 1 10/09/2022 00:16 WG1939614 cis-1,3-Dichloropropene ND 0.00369 1 10/09/2022 00:16 WG1939614 trans-1,3-Dichloropropene ND 0.00738 1 10/09/2022 00:16 WG1939614 2,2-Dichloropropane ND 0.00369 1 10/09/2022 00:16 WG1939614 Di-isopropyl ether ND 0.00148 1 10/09/2022 00:16 WG1939614 Ethylbenzene ND 0.00369 1 10/09/2022 00:16 WG1939614
Hexachloro-1,3-butadiene ND 0.0369 1 10/09/2022 00:16 WG1939614 Isopropylbenzene ND 0.00369 1 10/09/2022 00:16 WG1939614 p-Isopropyltoluene ND 0.00738 1 10/09/2022 00:16 WG1939614 2-Butanone (MEK) ND 0.148 1 10/09/2022 00:16 WG1939614
Methylene Chloride 0.497 0.0369 1 10/09/2022 00:16 WG1939614 4-Methyl-2-pentanone (MIBK) ND 0.0369 1 10/09/2022 00:16 WG1939614 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-015 L1543130 10/23/22 19:33 29 of 53 SAMPLE RESULTS - 08
L1543130
SB-4-15
Collected date/time: 10/04/22 12:15
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 0.00148 1 10/09/2022 00:16 WG1939614 Naphthalene ND 0.0184 1 10/09/2022 00:16 WG1939614
n-Propylbenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 Styrene ND 0.0184 1 10/09/2022 00:16 WG1939614
1,1,1,2-Tetrachloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,1,2,2-Tetrachloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,1,2-Trichlorotrifluoroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 Tetrachloroethene ND 0.00369 1 10/09/2022 00:16 WG1939614 Toluene 0.00806 0.00738 1 10/09/2022 00:16 WG1939614
1,2,3-Trichlorobenzene ND 0.0184 1 10/09/2022 00:16 WG1939614 1,2,4-Trichlorobenzene ND 0.0184 1 10/09/2022 00:16 WG1939614 1,1,1-Trichloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,1,2-Trichloroethane ND 0.00369 1 10/09/2022 00:16 WG1939614 Trichloroethene ND 0.00148 1 10/09/2022 00:16 WG1939614 Trichlorofluoromethane ND 0.00369 1 10/09/2022 00:16 WG1939614 1,2,3-Trichloropropane ND 0.0184 1 10/09/2022 00:16 WG1939614 1,2,4-Trimethylbenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,2,3-Trimethylbenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 1,3,5-Trimethylbenzene ND 0.00738 1 10/09/2022 00:16 WG1939614 Vinyl chloride ND 0.00369 1 10/09/2022 00:16 WG1939614
Xylenes, Total ND 0.00959 1 10/09/2022 00:16 WG1939614
(S) Toluene-d8 105 75.0-131 10/09/2022 00:16 WG1939614
(S) 4-Bromofluorobenzene 96.6 67.0-138 10/09/2022 00:16 WG1939614 (S) 1,2-Dichloroethane-d4 88.1 70.0-130 10/09/2022 00:16 WG1939614 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 4.84 1 10/10/2022 14:03 WG1939937 C22-C32 Hydrocarbons ND 4.84 1 10/10/2022 14:03 WG1939937 C32-C40 Hydrocarbons ND 4.84 1 10/10/2022 14:03 WG1939937 (S) o-Terphenyl 50.0 18.0-148 10/10/2022 14:03 WG1939937 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Total Solids by Method 2540 G-2011 L1543130-01,02,03,04,05,06,07,08 Method Blank (MB)
(MB) R3845725-1 10/06/22 13:08
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Total Solids 0.00100
L1543077-01 Original Sample (OS) • Duplicate (DUP)
(OS) L1543077-01 10/06/22 13:08 • (DUP) R3845725-3 10/06/22 13:08 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits
Analyte % % % %
Total Solids 82.1 81.7 1 0.534 10
Laboratory Control Sample (LCS)
(LCS) R3845725-2 10/06/22 13:08
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 L1543130-01,02,05
Method Blank (MB)
(MB) R3847139-1 10/11/22 11:50
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) R3847139-2 10/11/22 11:53
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Mercury 0.500 0.491 98.3 80.0-120
L1543130-05 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543130-05 10/11/22 11:55 • (MS) R3847139-3 10/11/22 11:58 • (MSD) R3847139-4 10/11/22 12:00 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 0.539 0.0779 0.703 0.794 116 133 1 75.0-125 J5 12.2 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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Mercury by Method 7471A L1543130-06
Method Blank (MB)
(MB) R3847525-1 10/12/22 09:32
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) R3847525-2 10/12/22 09:39
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
L1542951-04 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1542951-04 10/12/22 09:42 • (MS) R3847525-3 10/12/22 09:44 • (MSD) R3847525-4 10/12/22 09:47 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 0.556 ND 0.509 0.475 91.6 85.5 1 75.0-125 6.90 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-015 L1543130 10/23/22 19:33 33 of 53 WG1943190 QUALITY CONTROL SUMMARY
Metals (ICPMS) by Method 6020 L1543130-01,02,05,06
Method Blank (MB)
(MB) R3851856-1 10/23/22 11:43
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Antimony U 0.166 3.00
Arsenic U 0.100 1.00
Barium U 0.152 2.50
Beryllium U 0.138 2.50
Cadmium U 0.0855 1.00
Chromium U 0.297 5.00
Cobalt U 0.0463 1.00
Copper U 0.133 5.00
Lead U 0.0990 2.00
Molybdenum U 0.101 2.50
Nickel U 0.197 2.50
Selenium U 0.180 2.50
Silver U 0.0865 0.500
Thallium U 0.0650 2.00
Vanadium U 0.187 2.50
Zinc U 0.740 25.0
Laboratory Control Sample (LCS)
(LCS) R3851856-2 10/23/22 11:46
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Antimony 100 98.5 98.5 80.0-120
Arsenic 100 97.7 97.7 80.0-120
Barium 100 96.9 96.9 80.0-120
Beryllium 100 101 101 80.0-120
Cadmium 100 101 101 80.0-120
Chromium 100 98.7 98.7 80.0-120
Cobalt 100 101 101 80.0-120
Copper 100 97.3 97.3 80.0-120
Lead 100 96.6 96.6 80.0-120
Molybdenum 100 99.9 99.9 80.0-120
Nickel 100 99.7 99.7 80.0-120
Selenium 100 103 103 80.0-120
Silver 20.0 20.9 105 80.0-120
Thallium 100 97.5 97.5 80.0-120
Vanadium 100 99.8 99.8 80.0-120
Zinc 100 93.7 93.7 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 (ICPMS) by Method 6020 L1543130-01,02,05,06
L1542636-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1542636-02 10/23/22 11:49 • (MS) R3851856-5 10/23/22 11:59 • (MSD) R3851856-6 10/23/22 12:02 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 105 ND 41.2 36.3 39.2 34.6 5 75.0-125 J6 J6 12.5 20 Arsenic 105 2.48 96.0 89.1 89.0 82.4 5 75.0-125 7.51 20 Barium 105 106 207 216 95.4 104 5 75.0-125 4.42 20
Beryllium 105 ND 91.6 82.0 86.7 77.6 5 75.0-125 11.0 20 Cadmium 105 ND 99.1 93.1 94.2 88.6 5 75.0-125 6.21 20
Chromium 105 49.2 147 142 93.0 88.5 5 75.0-125 3.28 20
Cobalt 105 12.1 105 96.8 88.4 80.6 5 75.0-125 8.08 20
Copper 105 26.4 105 99.3 75.1 69.4 5 75.0-125 J6 5.86 20 Lead 105 4.77 97.3 87.4 88.1 78.7 5 75.0-125 10.8 20
Molybdenum 105 ND 92.5 86.5 87.8 82.1 5 75.0-125 6.68 20 Nickel 105 53.3 147 143 89.5 85.2 5 75.0-125 3.14 20
Selenium 105 ND 103 98.1 97.8 93.1 5 75.0-125 4.89 20
Silver 21.0 ND 20.2 19.2 96.3 91.6 5 75.0-125 5.02 20
Thallium 105 ND 96.1 86.4 91.5 82.2 5 75.0-125 10.7 20
Vanadium 105 60.1 152 145 87.2 80.4 5 75.0-125 4.81 20
Zinc 105 44.0 130 122 81.5 74.1 5 75.0-125 J6 6.17 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 L1543130-02,03,04,06,07,08 Method Blank (MB)
(MB) R3849848-2 10/17/22 13:41
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
TPHG C5 - C12 U 0.830 2.50
(S)
a,a,a-Trifluorotoluene(FID) 93.9 77.0-120
Laboratory Control Sample (LCS)
(LCS) R3849848-1 10/17/22 12:40
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
TPHG C5 - C12 5.50 4.90 89.1 72.0-125
(S)
a,a,a-Trifluorotoluene(FID) 102 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 L1543130-02,03,04,06,07,08 Method Blank (MB)
(MB) R3847938-3 10/08/22 17:28
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 0.000750 J 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 L1543130-02,03,04,06,07,08 Method Blank (MB)
(MB) R3847938-3 10/08/22 17:28
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 0.000625 J 0.000350 0.00100
Naphthalene U 0.00488 0.0125
n-Propylbenzene U 0.000950 0.00500
Styrene 0.00238 J 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 105 75.0-131
(S) 4-Bromofluorobenzene 93.1 67.0-138
(S) 1,2-Dichloroethane-d4 85.2 70.0-130
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3847938-1 10/08/22 16:31 • (LCSD) R3847938-2 10/08/22 16:50 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 0.646 1.25 103 200 10.0-160 J3 J4 63.7 31 Acrylonitrile 0.625 0.806 0.819 129 131 45.0-153 1.60 22 Benzene 0.125 0.130 0.132 104 106 70.0-123 1.53 20
Bromobenzene 0.125 0.122 0.114 97.6 91.2 73.0-121 6.78 20 Bromodichloromethane 0.125 0.133 0.137 106 110 73.0-121 2.96 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 L1543130-02,03,04,06,07,08 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3847938-1 10/08/22 16:31 • (LCSD) R3847938-2 10/08/22 16:50 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 0.132 0.132 106 106 64.0-132 0.000 20
Bromomethane 0.125 0.111 0.122 88.8 97.6 56.0-147 9.44 20 n-Butylbenzene 0.125 0.115 0.116 92.0 92.8 68.0-135 0.866 20 sec-Butylbenzene 0.125 0.125 0.116 100 92.8 74.0-130 7.47 20 tert-Butylbenzene 0.125 0.123 0.109 98.4 87.2 75.0-127 12.1 20 Carbon tetrachloride 0.125 0.136 0.139 109 111 66.0-128 2.18 20 Chlorobenzene 0.125 0.125 0.123 100 98.4 76.0-128 1.61 20 Chlorodibromomethane 0.125 0.127 0.123 102 98.4 74.0-127 3.20 20 Chloroethane 0.125 0.127 0.122 102 97.6 61.0-134 4.02 20 Chloroform 0.125 0.128 0.132 102 106 72.0-123 3.08 20
Chloromethane 0.125 0.124 0.122 99.2 97.6 51.0-138 1.63 20 2-Chlorotoluene 0.125 0.125 0.105 100 84.0 75.0-124 17.4 20 4-Chlorotoluene 0.125 0.126 0.113 101 90.4 75.0-124 10.9 20 1,2-Dibromo-3-Chloropropane 0.125 0.113 0.127 90.4 102 59.0-130 11.7 20 1,2-Dibromoethane 0.125 0.131 0.122 105 97.6 74.0-128 7.11 20 Dibromomethane 0.125 0.121 0.137 96.8 110 75.0-122 12.4 20 1,2-Dichlorobenzene 0.125 0.121 0.119 96.8 95.2 76.0-124 1.67 20 1,3-Dichlorobenzene 0.125 0.125 0.123 100 98.4 76.0-125 1.61 20 1,4-Dichlorobenzene 0.125 0.120 0.120 96.0 96.0 77.0-121 0.000 20 Dichlorodifluoromethane 0.125 0.105 0.106 84.0 84.8 43.0-156 0.948 20 1,1-Dichloroethane 0.125 0.128 0.132 102 106 70.0-127 3.08 20 1,2-Dichloroethane 0.125 0.136 0.138 109 110 65.0-131 1.46 20 1,1-Dichloroethene 0.125 0.131 0.131 105 105 65.0-131 0.000 20 cis-1,2-Dichloroethene 0.125 0.125 0.128 100 102 73.0-125 2.37 20 trans-1,2-Dichloroethene 0.125 0.123 0.131 98.4 105 71.0-125 6.30 20 1,2-Dichloropropane 0.125 0.126 0.133 101 106 74.0-125 5.41 20 1,1-Dichloropropene 0.125 0.128 0.130 102 104 73.0-125 1.55 20 1,3-Dichloropropane 0.125 0.119 0.115 95.2 92.0 80.0-125 3.42 20 cis-1,3-Dichloropropene 0.125 0.131 0.140 105 112 76.0-127 6.64 20 trans-1,3-Dichloropropene 0.125 0.133 0.126 106 101 73.0-127 5.41 20 2,2-Dichloropropane 0.125 0.163 0.155 130 124 59.0-135 5.03 20 Di-isopropyl ether 0.125 0.133 0.136 106 109 60.0-136 2.23 20 Ethylbenzene 0.125 0.122 0.118 97.6 94.4 74.0-126 3.33 20 Hexachloro-1,3-butadiene 0.125 0.0870 0.0941 69.6 75.3 57.0-150 7.84 20 Isopropylbenzene 0.125 0.124 0.122 99.2 97.6 72.0-127 1.63 20 p-Isopropyltoluene 0.125 0.119 0.117 95.2 93.6 72.0-133 1.69 20 2-Butanone (MEK) 0.625 0.710 0.811 114 130 30.0-160 13.3 24 Methylene Chloride 0.125 0.124 0.128 99.2 102 68.0-123 3.17 20 4-Methyl-2-pentanone (MIBK) 0.625 0.715 0.707 114 113 56.0-143 1.13 20 Methyl tert-butyl ether 0.125 0.147 0.145 118 116 66.0-132 1.37 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 L1543130-02,03,04,06,07,08 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3847938-1 10/08/22 16:31 • (LCSD) R3847938-2 10/08/22 16:50 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 0.107 0.111 85.6 88.8 59.0-130 3.67 20 n-Propylbenzene 0.125 0.127 0.118 102 94.4 74.0-126 7.35 20 Styrene 0.125 0.123 0.125 98.4 100 72.0-127 1.61 20
1,1,1,2-Tetrachloroethane 0.125 0.132 0.127 106 102 74.0-129 3.86 20 1,1,2,2-Tetrachloroethane 0.125 0.136 0.130 109 104 68.0-128 4.51 20 1,1,2-Trichlorotrifluoroethane 0.125 0.124 0.121 99.2 96.8 61.0-139 2.45 20 Tetrachloroethene 0.125 0.122 0.120 97.6 96.0 70.0-136 1.65 20 Toluene 0.125 0.124 0.117 99.2 93.6 75.0-121 5.81 20
1,2,3-Trichlorobenzene 0.125 0.101 0.106 80.8 84.8 59.0-139 4.83 20 1,2,4-Trichlorobenzene 0.125 0.0871 0.0938 69.7 75.0 62.0-137 7.41 20 1,1,1-Trichloroethane 0.125 0.132 0.142 106 114 69.0-126 7.30 20 1,1,2-Trichloroethane 0.125 0.124 0.119 99.2 95.2 78.0-123 4.12 20 Trichloroethene 0.125 0.128 0.136 102 109 76.0-126 6.06 20 Trichlorofluoromethane 0.125 0.125 0.132 100 106 61.0-142 5.45 20 1,2,3-Trichloropropane 0.125 0.135 0.126 108 101 67.0-129 6.90 20 1,2,4-Trimethylbenzene 0.125 0.116 0.118 92.8 94.4 70.0-126 1.71 20 1,2,3-Trimethylbenzene 0.125 0.114 0.113 91.2 90.4 74.0-124 0.881 20 1,3,5-Trimethylbenzene 0.125 0.120 0.113 96.0 90.4 73.0-127 6.01 20 Vinyl chloride 0.125 0.128 0.128 102 102 63.0-134 0.000 20 Xylenes, Total 0.375 0.359 0.366 95.7 97.6 72.0-127 1.93 20 (S) Toluene-d8 96.3 93.3 75.0-131
(S) 4-Bromofluorobenzene 100 105 67.0-138
(S) 1,2-Dichloroethane-d4 92.8 98.1 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 L1543130-02,03,04,06,08 Method Blank (MB)
(MB) R3847033-1 10/10/22 12:45
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 71.2 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3847033-2 10/10/22 12:57
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 50.0 18.8 37.6 50.0-150
C22-C32 Hydrocarbons 25.0 17.6 70.4 50.0-150
(S) o-Terphenyl 69.8 18.0-148
L1543130-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543130-03 10/10/22 15:34 • (MS) R3847033-3 10/10/22 15:47 • (MSD) R3847033-4 10/10/22 16:00 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 28.8 ND 17.3 15.7 60.1 54.4 1 50.0-150 9.86 20 C22-C32 Hydrocarbons 28.8 ND 17.4 16.0 60.5 55.6 1 50.0-150 8.33 20 (S) o-Terphenyl 51.1 43.5 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543130 10/23/22 19:33 41 of 53 WG1941312 QUALITY CONTROL SUMMARY
Semi-Volatile Organic Compounds (GC) by Method 8015 L1543130-07 Method Blank (MB)
(MB) R3848115-1 10/13/22 08:08
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 68.3 18.0-148
Laboratory Control Sample (LCS)
(LCS) R3848115-2 10/13/22 08:21
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
C12-C22 Hydrocarbons 25.0 18.7 74.8 50.0-150
C22-C32 Hydrocarbons 25.0 17.5 70.0 50.0-150
(S) o-Terphenyl 70.6 18.0-148
L1543852-17 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543852-17 10/13/22 21:30 • (MS) R3848115-3 10/13/22 21:43 • (MSD) R3848115-4 10/13/22 21:56 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 28.7 ND 99.1 90.1 346 314 4 50.0-150 J5 J5 9.58 20 C22-C32 Hydrocarbons 28.7 ND 400 382 1400 1330 4 50.0-150 J5 J5 4.69 20 (S) o-Terphenyl 69.1 72.0 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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Pesticides (GC) by Method 8081 L1543130-01,02
Method Blank (MB)
(MB) R3847734-1 10/12/22 00:44
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Aldrin U 0.00376 0.0200
Alpha BHC U 0.00368 0.0200
Beta BHC U 0.00379 0.0200
Delta BHC U 0.00346 0.0200
Gamma BHC U 0.00344 0.0200
Chlordane U 0.103 0.300
4,4-DDD U 0.00370 0.0200
4,4-DDE U 0.00366 0.0200
4,4-DDT U 0.00627 0.0200
Dieldrin U 0.00344 0.0200
Endosulfan I U 0.00363 0.0200
Endosulfan II U 0.00335 0.0200
Endosulfan sulfate U 0.00364 0.0200
Endrin U 0.00350 0.0200
Endrin aldehyde U 0.00339 0.0200
Endrin ketone U 0.00711 0.0200
Hexachlorobenzene U 0.00346 0.0200
Heptachlor U 0.00428 0.0200
Heptachlor epoxide U 0.00339 0.0200
Methoxychlor U 0.00484 0.0200
Toxaphene U 0.124 0.400
(S) Decachlorobiphenyl 67.1 10.0-135
(S) Tetrachloro-m-xylene 64.6 10.0-139
Laboratory Control Sample (LCS)
(LCS) R3847734-2 10/12/22 00:54
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Aldrin 0.0666 0.0445 66.8 34.0-136
Alpha BHC 0.0666 0.0394 59.2 34.0-139
Beta BHC 0.0666 0.0444 66.7 34.0-133
Delta BHC 0.0666 0.0362 54.4 34.0-135
Gamma BHC 0.0666 0.0385 57.8 34.0-136
4,4-DDD 0.0666 0.0403 60.5 33.0-141
4,4-DDE 0.0666 0.0390 58.6 34.0-134
4,4-DDT 0.0666 0.0338 50.8 30.0-143
Dieldrin 0.0666 0.0449 67.4 35.0-137
Endosulfan I 0.0666 0.0436 65.5 34.0-134
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Pesticides (GC) by Method 8081 L1543130-01,02
Laboratory Control Sample (LCS)
(LCS) R3847734-2 10/12/22 00:54
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Endosulfan II 0.0666 0.0451 67.7 35.0-132
Endosulfan sulfate 0.0666 0.0416 62.5 35.0-132
Endrin 0.0666 0.0386 58.0 34.0-137
Endrin aldehyde 0.0666 0.0371 55.7 23.0-121
Endrin ketone 0.0666 0.0403 60.5 35.0-144
Hexachlorobenzene 0.0666 0.0415 62.3 33.0-129
Heptachlor 0.0666 0.0465 69.8 36.0-141
Heptachlor epoxide 0.0666 0.0441 66.2 36.0-134
Methoxychlor 0.0666 0.0328 49.2 28.0-150 P
(S) Decachlorobiphenyl 63.2 10.0-135
(S) Tetrachloro-m-xylene 62.5 10.0-139
L1543130-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543130-02 10/12/22 01:40 • (MS) R3847734-3 10/12/22 01:49 • (MSD) R3847734-4 10/12/22 01:59 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 % % % % %
Aldrin 0.0699 ND 0.0421 0.0416 60.2 59.4 1 20.0-135 1.28 37 Alpha BHC 0.0699 ND 0.0407 0.0404 58.2 57.7 1 27.0-140 0.793 35 Beta BHC 0.0699 ND 0.0412 0.0412 59.0 59.0 1 23.0-141 0.000 37 Delta BHC 0.0699 ND 0.0390 0.0391 55.7 55.9 1 21.0-138 P 0.274 35 Gamma BHC 0.0699 ND 0.0397 0.0394 56.8 56.4 1 27.0-137 0.812 36 4,4-DDD 0.0699 ND 0.0361 0.0359 51.6 51.3 1 15.0-152 P P 0.595 39 4,4-DDE 0.0699 ND 0.0356 0.0357 50.8 51.0 1 10.0-152 P P 0.301 40 4,4-DDT 0.0699 ND 0.0330 0.0336 47.2 48.1 1 10.0-151 P P 1.93 40 Dieldrin 0.0699 ND 0.0417 0.0415 59.6 59.3 1 17.0-145 0.515 37 Endosulfan I 0.0699 ND 0.0401 0.0401 57.3 57.3 1 20.0-137 0.000 36 Endosulfan II 0.0699 ND 0.0405 0.0402 57.9 57.4 1 15.0-141 0.797 37 Endosulfan sulfate 0.0699 ND 0.0391 0.0391 55.9 55.9 1 15.0-143 0.000 38 Endrin 0.0699 ND 0.0388 0.0390 55.4 55.7 1 19.0-143 P 0.551 37 Endrin aldehyde 0.0699 ND 0.0404 0.0405 57.7 57.9 1 10.0-139 P 0.265 40 Endrin ketone 0.0699 ND 0.0392 0.0370 56.0 52.8 1 17.0-149 5.91 38 Hexachlorobenzene 0.0699 ND 0.0437 0.0440 62.5 62.9 1 25.0-126 0.733 35 Heptachlor 0.0699 ND 0.0439 0.0431 62.8 61.6 1 22.0-138 1.97 37 Heptachlor epoxide 0.0699 ND 0.0411 0.0410 58.8 58.7 1 22.0-138 0.261 36 Methoxychlor 0.0699 ND 0.0334 0.0336 47.8 48.1 1 10.0-159 P P 0.639 40 (S) Decachlorobiphenyl 56.2 55.6 10.0-135
(S) Tetrachloro-m-xylene 63.7 61.1 10.0-139
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-015 L1543130 10/23/22 19:33 44 of 53 WG1940661 QUALITY CONTROL SUMMARY
Pesticides (GC) by Method 8081 L1543130-05,06
Method Blank (MB)
(MB) R3847692-1 10/12/22 13:42
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Aldrin U 0.00376 0.0200
Alpha BHC U 0.00368 0.0200
Beta BHC U 0.00379 0.0200
Delta BHC U 0.00346 0.0200
Gamma BHC U 0.00344 0.0200
Chlordane U 0.103 0.300
4,4-DDD U 0.00370 0.0200
4,4-DDE U 0.00366 0.0200
4,4-DDT U 0.00627 0.0200
Dieldrin U 0.00344 0.0200
Endosulfan I U 0.00363 0.0200
Endosulfan II U 0.00335 0.0200
Endosulfan sulfate U 0.00364 0.0200
Endrin U 0.00350 0.0200
Endrin aldehyde U 0.00339 0.0200
Endrin ketone U 0.00711 0.0200
Hexachlorobenzene U 0.00346 0.0200
Heptachlor U 0.00428 0.0200
Heptachlor epoxide U 0.00339 0.0200
Methoxychlor U 0.00484 0.0200
Toxaphene U 0.124 0.400
(S) Decachlorobiphenyl 80.2 10.0-135
(S) Tetrachloro-m-xylene 64.3 10.0-139
Laboratory Control Sample (LCS)
(LCS) R3847692-2 10/12/22 13:52
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Aldrin 0.0666 0.0357 53.6 34.0-136
Alpha BHC 0.0666 0.0345 51.8 34.0-139
Beta BHC 0.0666 0.0318 47.7 34.0-133
Delta BHC 0.0666 0.0328 49.2 34.0-135
Gamma BHC 0.0666 0.0317 47.6 34.0-136
4,4-DDD 0.0666 0.0271 40.7 33.0-141
4,4-DDE 0.0666 0.0302 45.3 34.0-134
4,4-DDT 0.0666 0.0286 42.9 30.0-143
Dieldrin 0.0666 0.0324 48.6 35.0-137
Endosulfan I 0.0666 0.0327 49.1 34.0-134
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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Pesticides (GC) by Method 8081 L1543130-05,06
Laboratory Control Sample (LCS)
(LCS) R3847692-2 10/12/22 13:52
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Endosulfan II 0.0666 0.0309 46.4 35.0-132
Endosulfan sulfate 0.0666 0.0305 45.8 35.0-132
Endrin 0.0666 0.0306 45.9 34.0-137
Endrin aldehyde 0.0666 0.0304 45.6 23.0-121
Endrin ketone 0.0666 0.0311 46.7 35.0-144
Hexachlorobenzene 0.0666 0.0320 48.0 33.0-129
Heptachlor 0.0666 0.0344 51.7 36.0-141
Heptachlor epoxide 0.0666 0.0337 50.6 36.0-134
Methoxychlor 0.0666 0.0319 47.9 28.0-150
(S) Decachlorobiphenyl 50.2 10.0-135
(S) Tetrachloro-m-xylene 40.8 10.0-139
L1543785-13 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543785-13 10/12/22 18:33 • (MS) R3847692-3 10/12/22 18:44 • (MSD) R3847692-4 10/12/22 18:54 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 % % % % %
Aldrin 0.0855 ND 0.0512 0.0695 59.9 81.6 1 20.0-135 30.3 37 Alpha BHC 0.0855 ND 0.0605 0.0717 70.7 84.3 1 27.0-140 17.0 35 Beta BHC 0.0855 ND 0.0541 0.0631 63.3 74.2 1 23.0-141 15.3 37 Delta BHC 0.0855 ND 0.0568 0.0692 66.4 81.3 1 21.0-138 19.7 35 Gamma BHC 0.0855 ND 0.0546 0.0650 63.9 76.4 1 27.0-137 17.3 36 4,4-DDD 0.0855 ND 0.0404 0.0557 47.2 65.5 1 15.0-152 32.0 39 4,4-DDE 0.0855 ND 0.0443 0.0626 51.9 73.6 1 10.0-152 34.2 40 4,4-DDT 0.0855 ND 0.0343 0.0476 40.1 56.0 1 10.0-151 32.6 40 Dieldrin 0.0855 ND 0.0491 0.0626 57.4 73.6 1 17.0-145 24.2 37 Endosulfan I 0.0855 ND 0.0498 0.0640 58.2 75.3 1 20.0-137 25.1 36 Endosulfan II 0.0855 ND 0.0490 0.0615 57.3 72.3 1 15.0-141 22.8 37 Endosulfan sulfate 0.0855 ND 0.0484 0.0590 56.7 69.4 1 15.0-143 19.7 38 Endrin 0.0855 ND 0.0458 0.0572 53.6 67.2 1 19.0-143 22.1 37 Endrin aldehyde 0.0855 ND 0.0483 0.0632 56.5 74.3 1 10.0-139 26.8 40 Endrin ketone 0.0855 ND 0.0503 0.0631 58.8 74.2 1 17.0-149 22.6 38 Hexachlorobenzene 0.0855 ND 0.0484 0.0606 56.7 71.2 1 25.0-126 22.3 35 Heptachlor 0.0855 ND 0.0488 0.0640 57.1 75.3 1 22.0-138 27.0 37 Heptachlor epoxide 0.0855 ND 0.0512 0.0652 59.9 76.7 1 22.0-138 24.1 36 Methoxychlor 0.0855 ND 0.0415 0.0512 48.6 60.2 1 10.0-159 20.8 40 (S) Decachlorobiphenyl 50.2 65.2 10.0-135
(S) Tetrachloro-m-xylene 46.6 54.9 10.0-139
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/MS) by Method 8270C L1543130-01,02,05,06 Method Blank (MB)
(MB) R3847765-2 10/12/22 14:46
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Acenaphthene U 0.00539 0.0333
Acenaphthylene U 0.00469 0.0333
Anthracene U 0.00593 0.0333
Benzo(a)anthracene U 0.00587 0.0333
Benzo(b)fluoranthene U 0.00621 0.0333
Benzo(k)fluoranthene U 0.00592 0.0333
Benzo(g,h,i)perylene U 0.00609 0.0333
Benzo(a)pyrene U 0.00619 0.0333
Bis(2-chlorethoxy)methane U 0.0100 0.333
Bis(2-chloroethyl)ether U 0.0110 0.333
2,2-oxybis(1-chloropropane) U 0.0144 0.333
4-Bromophenyl-phenylether U 0.0117 0.333
2-Chloronaphthalene U 0.00585 0.0333
4-Chlorophenyl-phenylether U 0.0116 0.333
Chrysene U 0.00662 0.0333
Dibenz(a,h)anthracene U 0.00923 0.0333
3,3-Dichlorobenzidine U 0.0123 0.333
2,4-Dinitrotoluene U 0.00955 0.333
2,6-Dinitrotoluene U 0.0109 0.333
Fluoranthene U 0.00601 0.0333
Fluorene U 0.00542 0.0333
Hexachlorobenzene U 0.0118 0.333
Hexachloro-1,3-butadiene U 0.0112 0.333
Hexachlorocyclopentadiene U 0.0175 0.333
Hexachloroethane U 0.0131 0.333
Indeno(1,2,3-cd)pyrene U 0.00941 0.0333
Isophorone U 0.0102 0.333
Naphthalene U 0.00836 0.0333
Nitrobenzene U 0.0116 0.333
n-Nitrosodimethylamine U 0.0494 0.333
n-Nitrosodiphenylamine U 0.0252 0.333
n-Nitrosodi-n-propylamine U 0.0111 0.333
Phenanthrene U 0.00661 0.0333
Pyridine U 0.0220 0.333
Benzylbutyl phthalate U 0.0104 0.333
Bis(2-ethylhexyl)phthalate U 0.0422 0.333
Di-n-butyl phthalate U 0.0114 0.333
Diethyl phthalate U 0.0110 0.333
Dimethyl phthalate U 0.0706 0.333
Di-n-octyl phthalate U 0.0225 0.333
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/MS) by Method 8270C L1543130-01,02,05,06 Method Blank (MB)
(MB) R3847765-2 10/12/22 14:46
MB Result MB Qualifier MB MDL MB RDL
Analyte mg/kg mg/kg mg/kg
Pyrene U 0.00648 0.0333
1,2,4-Trichlorobenzene U 0.0104 0.333
4-Chloro-3-methylphenol U 0.0108 0.333
2-Chlorophenol U 0.0110 0.333
2,4-Dichlorophenol U 0.00970 0.333
2,4-Dimethylphenol U 0.00870 0.333
4,6-Dinitro-2-methylphenol U 0.0755 0.333
2,4-Dinitrophenol U 0.0779 0.333
2-Methylphenol U 0.0100 0.333
3&4-Methyl Phenol U 0.0104 0.333
2-Nitrophenol U 0.0119 0.333
4-Nitrophenol U 0.0104 0.333
Pentachlorophenol U 0.00896 0.333
Phenol U 0.0134 0.333
2,4,6-Trichlorophenol U 0.0107 0.333
2,4,5-Trichlorophenol U 0.0113 0.333
(S) 2-Fluorophenol 49.4 12.0-120
(S) Phenol-d5 45.8 10.0-120
(S) Nitrobenzene-d5 43.5 10.0-122
(S) 2-Fluorobiphenyl 44.7 15.0-120
(S) 2,4,6-Tribromophenol 53.5 10.0-127
(S) p-Terphenyl-d14 57.1 10.0-120
Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
Acenaphthene 0.666 0.359 53.9 38.0-120
Acenaphthylene 0.666 0.378 56.8 40.0-120
Anthracene 0.666 0.367 55.1 42.0-120
Benzo(a)anthracene 0.666 0.398 59.8 44.0-120
Benzo(b)fluoranthene 0.666 0.399 59.9 43.0-120
Benzo(k)fluoranthene 0.666 0.373 56.0 44.0-120
Benzo(g,h,i)perylene 0.666 0.421 63.2 43.0-120
Benzo(a)pyrene 0.666 0.410 61.6 45.0-120
Bis(2-chlorethoxy)methane 0.666 0.254 38.1 20.0-120
Bis(2-chloroethyl)ether 0.666 0.279 41.9 16.0-120
2,2-Oxybis(1-Chloropropane) 0.666 0.301 45.2 23.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543130 10/23/22 19:33 48 of 53 WG1940134 QUALITY CONTROL SUMMARY
Semi Volatile Organic Compounds (GC/MS) by Method 8270C L1543130-01,02,05,06 Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
4-Bromophenyl-phenylether 0.666 0.391 58.7 40.0-120
2-Chloronaphthalene 0.666 0.353 53.0 35.0-120
4-Chlorophenyl-phenylether 0.666 0.394 59.2 40.0-120
Chrysene 0.666 0.385 57.8 43.0-120
Dibenz(a,h)anthracene 0.666 0.395 59.3 44.0-120
3,3-Dichlorobenzidine 1.33 0.717 53.9 28.0-120
2,4-Dinitrotoluene 0.666 0.425 63.8 45.0-120
2,6-Dinitrotoluene 0.666 0.414 62.2 42.0-120
Fluoranthene 0.666 0.367 55.1 44.0-120
Fluorene 0.666 0.374 56.2 41.0-120
Hexachlorobenzene 0.666 0.387 58.1 39.0-120
Hexachloro-1,3-butadiene 0.666 0.335 50.3 15.0-120
Hexachlorocyclopentadiene 0.666 0.131 19.7 15.0-120
Hexachloroethane 0.666 0.314 47.1 17.0-120
Indeno(1,2,3-cd)pyrene 0.666 0.437 65.6 45.0-120
Isophorone 0.666 0.216 32.4 23.0-120
Naphthalene 0.666 0.282 42.3 18.0-120
Nitrobenzene 0.666 0.253 38.0 17.0-120
n-Nitrosodimethylamine 0.666 0.238 35.7 10.0-125
n-Nitrosodiphenylamine 0.666 0.329 49.4 40.0-120
n-Nitrosodi-n-propylamine 0.666 0.283 42.5 26.0-120
Phenanthrene 0.666 0.367 55.1 42.0-120
Pyridine 0.666 0.152 22.8 10.0-120
Benzylbutyl phthalate 0.666 0.393 59.0 40.0-120
Bis(2-ethylhexyl)phthalate 0.666 0.377 56.6 41.0-120
Di-n-butyl phthalate 0.666 0.345 51.8 43.0-120
Diethyl phthalate 0.666 0.392 58.9 43.0-120
Dimethyl phthalate 0.666 0.391 58.7 43.0-120
Di-n-octyl phthalate 0.666 0.399 59.9 40.0-120
Pyrene 0.666 0.376 56.5 41.0-120
1,2,4-Trichlorobenzene 0.666 0.320 48.0 17.0-120
4-Chloro-3-methylphenol 0.666 0.303 45.5 28.0-120
2-Chlorophenol 0.666 0.353 53.0 28.0-120
2,4-Dichlorophenol 0.666 0.338 50.8 25.0-120
2,4-Dimethylphenol 0.666 0.319 47.9 15.0-120
4,6-Dinitro-2-methylphenol 0.666 0.342 51.4 16.0-120
2,4-Dinitrophenol 0.666 0.245 36.8 10.0-120
2-Methylphenol 0.666 0.347 52.1 35.0-120
3&4-Methyl Phenol 0.666 0.375 56.3 42.0-120
2-Nitrophenol 0.666 0.335 50.3 20.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543130 10/23/22 19:33 49 of 53 WG1940134 QUALITY CONTROL SUMMARY
Semi Volatile Organic Compounds (GC/MS) by Method 8270C L1543130-01,02,05,06 Laboratory Control Sample (LCS)
(LCS) R3847765-1 10/12/22 14:25
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte mg/kg mg/kg % %
4-Nitrophenol 0.666 0.375 56.3 27.0-120
Pentachlorophenol 0.666 0.350 52.6 29.0-120
Phenol 0.666 0.305 45.8 28.0-120
2,4,6-Trichlorophenol 0.666 0.399 59.9 37.0-120
2,4,5-Trichlorophenol 0.666 0.379 56.9 38.0-120
(S) 2-Fluorophenol 50.0 12.0-120
(S) Phenol-d5 46.5 10.0-120
(S) Nitrobenzene-d5 37.8 10.0-122
(S) 2-Fluorobiphenyl 53.2 15.0-120
(S) 2,4,6-Tribromophenol 61.4 10.0-127
(S) p-Terphenyl-d14 60.1 10.0-120
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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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.

J3 The associated batch QC was outside the established quality control range for precision.

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.

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

P RPD between the primary and confirmatory analysis exceeded 40%. 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-015 L1543130 10/23/22 19:33 51 of 53 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
October 13, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1542630
Samples Received: 10/04/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 13, 2022
[Preliminary Report]
Jennifer A McCurdy
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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Jennifer A McCurdy
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
SB-1-18-28 L1542630-01 6
SB-2-18-28 L1542630-02 8
Qc: Quality Control Summary 10
Volatile Organic Compounds (GC) by Method 8015 10
Volatile Organic Compounds (GC/MS) by Method 8260B 12
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 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
SB-1-18-28 L1542630-01 GW N. Maroon 10/03/22 11:00 10/04/22 15:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1940454 1 10/11/22 19:53 10/11/22 19:53 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1940174 1 10/10/22 16:23 10/10/22 16:23 MAK Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1935839 1 10/05/22 09:57 10/06/22 14:12 HLJ Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-2-18-28 L1542630-02 GW N. Maroon 10/03/22 14:00 10/04/22 15:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1939391 1 10/08/22 22:41 10/08/22 22:41 DWR Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1939813 2 10/09/22 15:00 10/09/22 15:00 ACG Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1940174 2 10/10/22 16:44 10/10/22 16:44 MAK Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1935839 1 10/05/22 09:57 10/06/22 14:32 HLJ 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]
Jennifer A McCurdy
Project Manager
Volatile Organic Compounds (GC) by Method 8015
The sample matrix interfered with the ability to make any accurate determination; spike value is low.

Batch Lab Sample ID Analytes
WG1939391 (MS) R3846798-3, (MSD) R3846798-4 TPHG C5 - C12 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
WG1939813 (LCS) R3846520-2, L1542630-02 Chloroform
WG1940174 (LCS) R3848053-1, L1542630-01 Trichloroethene Semi-Volatile Organic Compounds (GC) by Method 3511/8015 Surrogate recovery limits have been exceeded; values are outside upper control limits.

Batch Analyte Lab Sample ID
WG1935839 o-Terphenyl L1542630-02
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
SB-2-18-28 L1542630-02 Trichloroethene 2.07 1.00 2 10/09/2022 15:00 WG1939813 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
SB-2-18-28 L1542630-02 C12-C22 Hydrocarbons 1020 100 1 10/06/2022 14:32 WG1935839 SB-2-18-28 L1542630-02 C22-C32 Hydrocarbons 160 100 1 10/06/2022 14:32 WG1935839 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1542630
SB-1-18-28
Collected date/time: 10/03/22 11:00
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 10/11/2022 19:53 WG1940454
(S) a,a,a-Trifluorotoluene(FID) 107 78.0-120 10/11/2022 19:53 WG1940454 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 10/10/2022 16:23 WG1940174
Acrylonitrile ND 5.00 1 10/10/2022 16:23 WG1940174
Benzene ND 0.500 1 10/10/2022 16:23 WG1940174
Bromobenzene ND 0.500 1 10/10/2022 16:23 WG1940174
Bromodichloromethane ND 0.500 1 10/10/2022 16:23 WG1940174 Bromochloromethane ND 0.500 1 10/10/2022 16:23 WG1940174 Bromoform ND 0.500 1 10/10/2022 16:23 WG1940174
Bromomethane ND 2.50 1 10/10/2022 16:23 WG1940174
n-Butylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174
sec-Butylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174
tert-Butylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174 Carbon disulfide ND 0.500 1 10/10/2022 16:23 WG1940174
Carbon tetrachloride ND 0.500 1 10/10/2022 16:23 WG1940174 Chlorobenzene ND 0.500 1 10/10/2022 16:23 WG1940174
Chlorodibromomethane ND 0.500 1 10/10/2022 16:23 WG1940174 Chloroethane ND 2.50 1 10/10/2022 16:23 WG1940174
Chloroform ND 0.500 1 10/10/2022 16:23 WG1940174
Chloromethane ND 1.25 1 10/10/2022 16:23 WG1940174
2-Chlorotoluene ND 0.500 1 10/10/2022 16:23 WG1940174
4-Chlorotoluene ND 0.500 1 10/10/2022 16:23 WG1940174
1,2-Dibromo-3-Chloropropane ND 2.50 1 10/10/2022 16:23 WG1940174 1,2-Dibromoethane ND 0.500 1 10/10/2022 16:23 WG1940174 Dibromomethane ND 0.500 1 10/10/2022 16:23 WG1940174
1,2-Dichlorobenzene ND 0.500 1 10/10/2022 16:23 WG1940174 1,3-Dichlorobenzene ND 0.500 1 10/10/2022 16:23 WG1940174 1,4-Dichlorobenzene ND 0.500 1 10/10/2022 16:23 WG1940174 Dichlorodifluoromethane ND 2.50 1 10/10/2022 16:23 WG1940174 1,1-Dichloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 1,2-Dichloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 1,1-Dichloroethene ND 0.500 1 10/10/2022 16:23 WG1940174 cis-1,2-Dichloroethene ND 0.500 1 10/10/2022 16:23 WG1940174 trans-1,2-Dichloroethene ND 0.500 1 10/10/2022 16:23 WG1940174 1,2-Dichloropropane ND 0.500 1 10/10/2022 16:23 WG1940174 1,1-Dichloropropene ND 0.500 1 10/10/2022 16:23 WG1940174 1,3-Dichloropropane ND 1.00 1 10/10/2022 16:23 WG1940174 cis-1,3-Dichloropropene ND 0.500 1 10/10/2022 16:23 WG1940174 trans-1,3-Dichloropropene ND 0.500 1 10/10/2022 16:23 WG1940174 trans-1,4-Dichloro-2-butene ND 5.00 1 10/10/2022 16:23 WG1940174 2,2-Dichloropropane ND 0.500 1 10/10/2022 16:23 WG1940174 Di-isopropyl ether ND 0.500 1 10/10/2022 16:23 WG1940174 Ethylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174
Hexachloro-1,3-butadiene ND 1.00 1 10/10/2022 16:23 WG1940174 2-Hexanone ND 5.00 1 10/10/2022 16:23 WG1940174
n-Hexane ND 5.00 1 10/10/2022 16:23 WG1940174
Iodomethane ND 5.00 1 10/10/2022 16:23 WG1940174
Isopropylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174
p-Isopropyltoluene ND 0.500 1 10/10/2022 16:23 WG1940174 2-Butanone (MEK) ND 5.00 1 10/10/2022 16:23 WG1940174
Methylene Chloride ND 2.50 1 10/10/2022 16:23 WG1940174 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1542630
SB-1-18-28
Collected date/time: 10/03/22 11:00
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 10/10/2022 16:23 WG1940174 Methyl tert-butyl ether ND 0.500 1 10/10/2022 16:23 WG1940174 Naphthalene ND 2.50 1 10/10/2022 16:23 WG1940174
n-Propylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174
Styrene ND 0.500 1 10/10/2022 16:23 WG1940174
1,1,1,2-Tetrachloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 1,1,2,2-Tetrachloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 1,1,2-Trichlorotrifluoroethane ND 0.500 1 10/10/2022 16:23 WG1940174 Tetrachloroethene ND 0.500 1 10/10/2022 16:23 WG1940174 Toluene ND 0.500 1 10/10/2022 16:23 WG1940174
1,2,3-Trichlorobenzene ND 0.500 1 10/10/2022 16:23 WG1940174 1,2,4-Trichlorobenzene ND 1.00 1 10/10/2022 16:23 WG1940174 1,1,1-Trichloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 1,1,2-Trichloroethane ND 0.500 1 10/10/2022 16:23 WG1940174 Trichloroethene ND J4 0.500 1 10/10/2022 16:23 WG1940174 Trichlorofluoromethane ND 2.50 1 10/10/2022 16:23 WG1940174 1,2,3-Trichloropropane ND 2.50 1 10/10/2022 16:23 WG1940174 1,2,4-Trimethylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174 1,2,3-Trimethylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174 1,3,5-Trimethylbenzene ND 0.500 1 10/10/2022 16:23 WG1940174 Vinyl acetate ND 5.00 1 10/10/2022 16:23 WG1940174
Vinyl chloride ND 0.500 1 10/10/2022 16:23 WG1940174
Xylenes, Total ND 1.50 1 10/10/2022 16:23 WG1940174
1,4-Dioxane ND 100 1 10/10/2022 16:23 WG1940174
(S) Toluene-d8 109 80.0-120 10/10/2022 16:23 WG1940174
(S) 4-Bromofluorobenzene 107 77.0-126 10/10/2022 16:23 WG1940174 (S) 1,2-Dichloroethane-d4 96.9 70.0-130 10/10/2022 16:23 WG1940174 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 10/06/2022 14:12 WG1935839 C22-C32 Hydrocarbons ND 100 1 10/06/2022 14:12 WG1935839 C32-C40 Hydrocarbons ND 100 1 10/06/2022 14:12 WG1935839 (S) o-Terphenyl 89.5 52.0-156 10/06/2022 14:12 WG1935839 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-015 L1542630 10/13/22 18:18 7 of 25 SAMPLE RESULTS - 02
L1542630
SB-2-18-28
Collected date/time: 10/03/22 14:00
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 10/08/2022 22:41 WG1939391
(S) a,a,a-Trifluorotoluene(FID) 99.1 78.0-120 10/08/2022 22:41 WG1939391 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 10/09/2022 15:00 WG1939813
Acrylonitrile ND 10.0 2 10/09/2022 15:00 WG1939813
Benzene ND 1.00 2 10/09/2022 15:00 WG1939813
Bromobenzene ND 1.00 2 10/09/2022 15:00 WG1939813
Bromodichloromethane ND 1.00 2 10/09/2022 15:00 WG1939813 Bromochloromethane ND 1.00 2 10/09/2022 15:00 WG1939813 Bromoform ND 1.00 2 10/09/2022 15:00 WG1939813
Bromomethane ND 5.00 2 10/09/2022 15:00 WG1939813
n-Butylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
sec-Butylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
tert-Butylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
Carbon disulfide ND 1.00 2 10/09/2022 15:00 WG1939813
Carbon tetrachloride ND 1.00 2 10/09/2022 15:00 WG1939813 Chlorobenzene ND 1.00 2 10/09/2022 15:00 WG1939813
Chlorodibromomethane ND 1.00 2 10/09/2022 15:00 WG1939813 Chloroethane ND 5.00 2 10/09/2022 15:00 WG1939813
Chloroform ND J4 1.00 2 10/09/2022 15:00 WG1939813
Chloromethane ND 2.50 2 10/09/2022 15:00 WG1939813
2-Chlorotoluene ND 1.00 2 10/09/2022 15:00 WG1939813
4-Chlorotoluene ND 1.00 2 10/09/2022 15:00 WG1939813
1,2-Dibromo-3-Chloropropane ND 5.00 2 10/09/2022 15:00 WG1939813 1,2-Dibromoethane ND 1.00 2 10/09/2022 15:00 WG1939813
Dibromomethane ND 1.00 2 10/09/2022 15:00 WG1939813
1,2-Dichlorobenzene ND 1.00 2 10/09/2022 15:00 WG1939813 1,3-Dichlorobenzene ND 1.00 2 10/09/2022 15:00 WG1939813 1,4-Dichlorobenzene ND 1.00 2 10/09/2022 15:00 WG1939813 Dichlorodifluoromethane ND 5.00 2 10/09/2022 15:00 WG1939813 1,1-Dichloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 1,2-Dichloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 1,1-Dichloroethene ND 1.00 2 10/09/2022 15:00 WG1939813 cis-1,2-Dichloroethene ND 1.00 2 10/10/2022 16:44 WG1940174 trans-1,2-Dichloroethene ND 1.00 2 10/09/2022 15:00 WG1939813 1,2-Dichloropropane ND 1.00 2 10/09/2022 15:00 WG1939813 1,1-Dichloropropene ND 1.00 2 10/09/2022 15:00 WG1939813 1,3-Dichloropropane ND 2.00 2 10/09/2022 15:00 WG1939813 cis-1,3-Dichloropropene ND 1.00 2 10/09/2022 15:00 WG1939813 trans-1,3-Dichloropropene ND 1.00 2 10/09/2022 15:00 WG1939813 trans-1,4-Dichloro-2-butene ND 10.0 2 10/09/2022 15:00 WG1939813 2,2-Dichloropropane ND 1.00 2 10/09/2022 15:00 WG1939813 Di-isopropyl ether ND 1.00 2 10/09/2022 15:00 WG1939813 Ethylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
Hexachloro-1,3-butadiene ND 2.00 2 10/09/2022 15:00 WG1939813 2-Hexanone ND 10.0 2 10/09/2022 15:00 WG1939813
n-Hexane ND 10.0 2 10/09/2022 15:00 WG1939813
Iodomethane ND 10.0 2 10/09/2022 15:00 WG1939813
Isopropylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
p-Isopropyltoluene ND 1.00 2 10/09/2022 15:00 WG1939813 2-Butanone (MEK) ND 10.0 2 10/09/2022 15:00 WG1939813
Methylene Chloride ND 5.00 2 10/09/2022 15:00 WG1939813 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-015 L1542630 10/13/22 18:18 8 of 25 SAMPLE RESULTS - 02
L1542630
SB-2-18-28
Collected date/time: 10/03/22 14:00
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 10.0 2 10/09/2022 15:00 WG1939813 Methyl tert-butyl ether ND 1.00 2 10/09/2022 15:00 WG1939813 Naphthalene ND 5.00 2 10/09/2022 15:00 WG1939813
n-Propylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813
Styrene ND 1.00 2 10/09/2022 15:00 WG1939813
1,1,1,2-Tetrachloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 1,1,2,2-Tetrachloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 1,1,2-Trichlorotrifluoroethane ND 1.00 2 10/09/2022 15:00 WG1939813 Tetrachloroethene ND 1.00 2 10/09/2022 15:00 WG1939813
Toluene ND 1.00 2 10/09/2022 15:00 WG1939813
1,2,3-Trichlorobenzene ND 1.00 2 10/09/2022 15:00 WG1939813 1,2,4-Trichlorobenzene ND 2.00 2 10/09/2022 15:00 WG1939813 1,1,1-Trichloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 1,1,2-Trichloroethane ND 1.00 2 10/09/2022 15:00 WG1939813 Trichloroethene 2.07 1.00 2 10/09/2022 15:00 WG1939813
Trichlorofluoromethane ND 5.00 2 10/09/2022 15:00 WG1939813 1,2,3-Trichloropropane ND 5.00 2 10/09/2022 15:00 WG1939813 1,2,4-Trimethylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813 1,2,3-Trimethylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813 1,3,5-Trimethylbenzene ND 1.00 2 10/09/2022 15:00 WG1939813 Vinyl acetate ND 10.0 2 10/09/2022 15:00 WG1939813
Vinyl chloride ND 1.00 2 10/09/2022 15:00 WG1939813
Xylenes, Total ND 3.00 2 10/09/2022 15:00 WG1939813
1,4-Dioxane ND 200 2 10/09/2022 15:00 WG1939813
(S) Toluene-d8 102 80.0-120 10/09/2022 15:00 WG1939813
(S) Toluene-d8 113 80.0-120 10/10/2022 16:44 WG1940174
(S) 4-Bromofluorobenzene 110 77.0-126 10/09/2022 15:00 WG1939813 (S) 4-Bromofluorobenzene 111 77.0-126 10/10/2022 16:44 WG1940174 (S) 1,2-Dichloroethane-d4 118 70.0-130 10/09/2022 15:00 WG1939813 (S) 1,2-Dichloroethane-d4 94.0 70.0-130 10/10/2022 16:44 WG1940174 Sample Narrative:

L1542630-02 WG1939813: 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 1020 100 1 10/06/2022 14:32 WG1935839 C22-C32 Hydrocarbons 160 100 1 10/06/2022 14:32 WG1935839 C32-C40 Hydrocarbons ND 100 1 10/06/2022 14:32 WG1935839 (S) o-Terphenyl 232 J1 52.0-156 10/06/2022 14:32 WG1935839 Sample Narrative:

L1542630-02 WG1935839: Surrogate failure due to matrix interference 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-015 L1542630 10/13/22 18:18 9 of 25 WG1939391 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC) by Method 8015 L1542630-02 Method Blank (MB)
(MB) R3846798-2 10/08/22 17:21
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
TPHG C5 - C12 43.4 J 30.4 100
(S)
a,a,a-Trifluorotoluene(FID) 107 78.0-120
Laboratory Control Sample (LCS)
(LCS) R3846798-1 10/08/22 16:06
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) 113 78.0-120
L1542505-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1542505-02 10/08/22 19:23 • (MS) R3846798-3 10/09/22 01:37 • (MSD) R3846798-4 10/09/22 01:59 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 % % % % %
TPHG C5 - C12 5500 ND 211 191 3.16 2.79 1 10.0-158 J6 J6 9.95 20 (S)
a,a,a-Trifluorotoluene(FID) 106 106 78.0-120
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-015 L1542630 10/13/22 18:18 10 of 25 WG1940454 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC) by Method 8015 L1542630-01 Method Blank (MB)
(MB) R3847385-3 10/11/22 18:57
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) 108 78.0-120
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3847385-1 10/11/22 17:17 • (LCSD) R3847385-2 10/11/22 17:39 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 % % % % %
TPHG C5 - C12 5500 6070 6060 110 110 71.0-127 0.165 20
(S)
a,a,a-Trifluorotoluene(FID) 100 102 78.0-120
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-015 L1542630 10/13/22 18:18 11 of 25 WG1939813 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542630-02 Method Blank (MB)
(MB) R3846520-3 10/09/22 12:25
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
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
Ethylbenzene U 0.137 0.500
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-015 L1542630 10/13/22 18:18 12 of 25 WG1939813 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542630-02 Method Blank (MB)
(MB) R3846520-3 10/09/22 12:25
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
Hexachloro-1,3-butadiene U 0.337 1.00
2-Hexanone U 0.787 5.00
n-Hexane U 0.749 5.00
Iodomethane 0.567 J 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 101 80.0-120
(S) 4-Bromofluorobenzene 115 77.0-126
(S) 1,2-Dichloroethane-d4 118 70.0-130
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-015 L1542630 10/13/22 18:18 13 of 25 WG1939813 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542630-02 Laboratory Control Sample (LCS)
(LCS) R3846520-1 10/09/22 08:07
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
1,4-Dioxane 1000 1170 117 13.0-160
(S) Toluene-d8 101 80.0-120
(S) 4-Bromofluorobenzene 113 77.0-126
(S) 1,2-Dichloroethane-d4 117 70.0-130
Laboratory Control Sample (LCS)
(LCS) R3846520-2 10/09/22 11:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Acetone 25.0 28.4 114 19.0-160
Acrylonitrile 25.0 26.5 106 55.0-149
Benzene 5.00 5.16 103 70.0-123
Bromobenzene 5.00 4.72 94.4 73.0-121
Bromodichloromethane 5.00 5.70 114 75.0-120
Bromochloromethane 5.00 5.97 119 76.0-122
Bromoform 5.00 4.63 92.6 68.0-132
Bromomethane 5.00 2.12 42.4 10.0-160
n-Butylbenzene 5.00 4.45 89.0 73.0-125
sec-Butylbenzene 5.00 4.93 98.6 75.0-125
tert-Butylbenzene 5.00 4.83 96.6 76.0-124
Carbon disulfide 5.00 4.80 96.0 61.0-128
Carbon tetrachloride 5.00 5.43 109 68.0-126
Chlorobenzene 5.00 5.07 101 80.0-121
Chlorodibromomethane 5.00 4.73 94.6 77.0-125
Chloroethane 5.00 4.79 95.8 47.0-150
Chloroform 5.00 6.04 121 73.0-120 J4
Chloromethane 5.00 6.36 127 41.0-142
2-Chlorotoluene 5.00 5.11 102 76.0-123
4-Chlorotoluene 5.00 5.03 101 75.0-122
1,2-Dibromo-3-Chloropropane 5.00 3.97 79.4 58.0-134
1,2-Dibromoethane 5.00 4.87 97.4 80.0-122
Dibromomethane 5.00 5.29 106 80.0-120
1,2-Dichlorobenzene 5.00 4.69 93.8 79.0-121
1,3-Dichlorobenzene 5.00 4.46 89.2 79.0-120
1,4-Dichlorobenzene 5.00 4.21 84.2 79.0-120
Dichlorodifluoromethane 5.00 3.99 79.8 51.0-149
1,1-Dichloroethane 5.00 5.55 111 70.0-126
1,2-Dichloroethane 5.00 5.94 119 70.0-128
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-015 L1542630 10/13/22 18:18 14 of 25 WG1939813 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1542630-02 Laboratory Control Sample (LCS)
(LCS) R3846520-2 10/09/22 11:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
1,1-Dichloroethene 5.00 5.05 101 71.0-124
trans-1,2-Dichloroethene 5.00 5.66 113 73.0-120
1,2-Dichloropropane 5.00 5.04 101 77.0-125
1,1-Dichloropropene 5.00 5.34 107 74.0-126
1,3-Dichloropropane 5.00 5.14 103 80.0-120
cis-1,3-Dichloropropene 5.00 5.28 106 80.0-123
trans-1,3-Dichloropropene 5.00 4.90 98.0 78.0-124
trans-1,4-Dichloro-2-butene 5.00 2.84 56.8 33.0-144
2,2-Dichloropropane 5.00 5.77 115 58.0-130
Di-isopropyl ether 5.00 4.90 98.0 58.0-138
Ethylbenzene 5.00 4.97 99.4 79.0-123
Hexachloro-1,3-butadiene 5.00 5.44 109 54.0-138
2-Hexanone 25.0 20.8 83.2 67.0-149
n-Hexane 5.00 4.39 87.8 57.0-133
Iodomethane 25.0 12.0 48.0 33.0-147
Isopropylbenzene 5.00 4.88 97.6 76.0-127
p-Isopropyltoluene 5.00 4.72 94.4 76.0-125
2-Butanone (MEK) 25.0 24.7 98.8 44.0-160
Methylene Chloride 5.00 5.76 115 67.0-120
4-Methyl-2-pentanone (MIBK) 25.0 21.4 85.6 68.0-142
Methyl tert-butyl ether 5.00 5.58 112 68.0-125
Naphthalene 5.00 3.34 66.8 54.0-135
n-Propylbenzene 5.00 4.82 96.4 77.0-124
Styrene 5.00 4.72 94.4 73.0-130
1,1,1,2-Tetrachloroethane 5.00 5.16 103 75.0-125
1,1,2,2-Tetrachloroethane 5.00 4.62 92.4 65.0-130
1,1,2-Trichlorotrifluoroethane 5.00 5.67 113 69.0-132
Tetrachloroethene 5.00 4.73 94.6 72.0-132
Toluene 5.00 4.78 95.6 79.0-120
1,2,3-Trichlorobenzene 5.00 4.04 80.8 50.0-138
1,2,4-Trichlorobenzene 5.00 4.49 89.8 57.0-137
1,1,1-Trichloroethane 5.00 5.73 115 73.0-124
1,1,2-Trichloroethane 5.00 4.74 94.8 80.0-120
Trichloroethene 5.00 5.48 110 78.0-124
Trichlorofluoromethane 5.00 5.97 119 59.0-147
1,2,3-Trichloropropane 5.00 5.31 106 73.0-130
1,2,4-Trimethylbenzene 5.00 4.81 96.2 76.0-121
1,2,3-Trimethylbenzene 5.00 4.98 99.6 77.0-120
1,3,5-Trimethylbenzene 5.00 4.50 90.0 76.0-122
Vinyl acetate 25.0 26.0 104 11.0-160
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 L1542630-02 Laboratory Control Sample (LCS)
(LCS) R3846520-2 10/09/22 11:12
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
Vinyl chloride 5.00 4.65 93.0 67.0-131
Xylenes, Total 15.0 14.4 96.0 79.0-123
(S) Toluene-d8 97.5 80.0-120
(S) 4-Bromofluorobenzene 107 77.0-126
(S) 1,2-Dichloroethane-d4 119 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 L1542630-01,02 Method Blank (MB)
(MB) R3848053-3 10/10/22 14:51
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 L1542630-01,02 Method Blank (MB)
(MB) R3848053-3 10/10/22 14:51
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 113 80.0-120
(S) 4-Bromofluorobenzene 111 77.0-126
(S) 1,2-Dichloroethane-d4 93.6 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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Volatile Organic Compounds (GC/MS) by Method 8260B L1542630-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3848053-1 10/10/22 13:24 • (LCSD) R3848053-2 10/10/22 13:46 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 % % % % %
Acetone 25.0 20.6 20.5 82.4 82.0 19.0-160 0.487 27
Acrylonitrile 25.0 20.8 20.6 83.2 82.4 55.0-149 0.966 20 Benzene 5.00 5.47 5.37 109 107 70.0-123 1.85 20
Bromobenzene 5.00 5.51 5.67 110 113 73.0-121 2.86 20
Bromodichloromethane 5.00 5.13 4.99 103 99.8 75.0-120 2.77 20 Bromochloromethane 5.00 5.59 5.50 112 110 76.0-122 1.62 20 Bromoform 5.00 4.27 4.32 85.4 86.4 68.0-132 1.16 20
Bromomethane 5.00 4.29 4.33 85.8 86.6 10.0-160 0.928 25 n-Butylbenzene 5.00 5.49 5.64 110 113 73.0-125 2.70 20
sec-Butylbenzene 5.00 6.04 6.15 121 123 75.0-125 1.80 20 tert-Butylbenzene 5.00 5.94 5.83 119 117 76.0-124 1.87 20 Carbon disulfide 5.00 5.04 4.85 101 97.0 61.0-128 3.84 20 Carbon tetrachloride 5.00 5.21 4.84 104 96.8 68.0-126 7.36 20 Chlorobenzene 5.00 5.59 5.67 112 113 80.0-121 1.42 20
Chlorodibromomethane 5.00 5.35 5.08 107 102 77.0-125 5.18 20 Chloroethane 5.00 4.76 4.16 95.2 83.2 47.0-150 13.5 20
Chloroform 5.00 5.27 5.07 105 101 73.0-120 3.87 20
Chloromethane 5.00 3.83 3.56 76.6 71.2 41.0-142 7.31 20 2-Chlorotoluene 5.00 5.83 5.87 117 117 76.0-123 0.684 20 4-Chlorotoluene 5.00 5.67 5.59 113 112 75.0-122 1.42 20 1,2-Dibromo-3-Chloropropane 5.00 4.51 4.83 90.2 96.6 58.0-134 6.85 20 1,2-Dibromoethane 5.00 5.66 5.60 113 112 80.0-122 1.07 20 Dibromomethane 5.00 5.50 5.52 110 110 80.0-120 0.363 20 1,2-Dichlorobenzene 5.00 5.84 5.75 117 115 79.0-121 1.55 20 1,3-Dichlorobenzene 5.00 5.67 5.59 113 112 79.0-120 1.42 20 1,4-Dichlorobenzene 5.00 4.84 5.55 96.8 111 79.0-120 13.7 20 Dichlorodifluoromethane 5.00 5.03 4.69 101 93.8 51.0-149 7.00 20 1,1-Dichloroethane 5.00 4.97 4.82 99.4 96.4 70.0-126 3.06 20 1,2-Dichloroethane 5.00 4.75 4.83 95.0 96.6 70.0-128 1.67 20 1,1-Dichloroethene 5.00 5.50 5.11 110 102 71.0-124 7.35 20 cis-1,2-Dichloroethene 5.00 5.59 5.04 112 101 73.0-120 10.3 20 trans-1,2-Dichloroethene 5.00 5.40 5.56 108 111 73.0-120 2.92 20 1,2-Dichloropropane 5.00 5.00 4.75 100 95.0 77.0-125 5.13 20 1,1-Dichloropropene 5.00 5.25 5.06 105 101 74.0-126 3.69 20 1,3-Dichloropropane 5.00 5.29 5.42 106 108 80.0-120 2.43 20 cis-1,3-Dichloropropene 5.00 5.26 4.89 105 97.8 80.0-123 7.29 20 trans-1,3-Dichloropropene 5.00 4.43 4.40 88.6 88.0 78.0-124 0.680 20 trans-1,4-Dichloro-2-butene 5.00 2.69 3.03 53.8 60.6 33.0-144 11.9 20 2,2-Dichloropropane 5.00 5.04 4.79 101 95.8 58.0-130 5.09 20 Di-isopropyl ether 5.00 3.88 3.89 77.6 77.8 58.0-138 0.257 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 L1542630-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3848053-1 10/10/22 13:24 • (LCSD) R3848053-2 10/10/22 13:46 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 % % % % %
Ethylbenzene 5.00 5.62 5.33 112 107 79.0-123 5.30 20
Hexachloro-1,3-butadiene 5.00 4.94 4.94 98.8 98.8 54.0-138 0.000 20 2-Hexanone 25.0 22.2 22.7 88.8 90.8 67.0-149 2.23 20
n-Hexane 5.00 4.60 4.34 92.0 86.8 57.0-133 5.82 20
Iodomethane 25.0 17.4 18.2 69.6 72.8 33.0-147 4.49 26
Isopropylbenzene 5.00 5.68 5.58 114 112 76.0-127 1.78 20 p-Isopropyltoluene 5.00 5.91 5.62 118 112 76.0-125 5.03 20 2-Butanone (MEK) 25.0 21.2 21.3 84.8 85.2 44.0-160 0.471 20 Methylene Chloride 5.00 5.17 4.73 103 94.6 67.0-120 8.89 20 4-Methyl-2-pentanone (MIBK) 25.0 20.7 21.0 82.8 84.0 68.0-142 1.44 20 Methyl tert-butyl ether 5.00 5.05 4.77 101 95.4 68.0-125 5.70 20 Naphthalene 5.00 5.73 6.04 115 121 54.0-135 5.27 20
n-Propylbenzene 5.00 6.11 6.04 122 121 77.0-124 1.15 20 Styrene 5.00 5.63 5.40 113 108 73.0-130 4.17 20
1,1,1,2-Tetrachloroethane 5.00 5.40 4.95 108 99.0 75.0-125 8.70 20 1,1,2,2-Tetrachloroethane 5.00 5.07 5.04 101 101 65.0-130 0.593 20 1,1,2-Trichlorotrifluoroethane 5.00 5.29 5.45 106 109 69.0-132 2.98 20 Tetrachloroethene 5.00 5.33 5.40 107 108 72.0-132 1.30 20 Toluene 5.00 5.71 5.67 114 113 79.0-120 0.703 20
1,2,3-Trichlorobenzene 5.00 5.12 5.19 102 104 50.0-138 1.36 20 1,2,4-Trichlorobenzene 5.00 5.51 5.20 110 104 57.0-137 5.79 20 1,1,1-Trichloroethane 5.00 5.54 5.29 111 106 73.0-124 4.62 20 1,1,2-Trichloroethane 5.00 5.18 5.51 104 110 80.0-120 6.17 20 Trichloroethene 5.00 6.44 5.94 129 119 78.0-124 J4 8.08 20 Trichlorofluoromethane 5.00 5.31 5.17 106 103 59.0-147 2.67 20 1,2,3-Trichloropropane 5.00 5.28 5.50 106 110 73.0-130 4.08 20 1,2,4-Trimethylbenzene 5.00 5.86 5.80 117 116 76.0-121 1.03 20 1,2,3-Trimethylbenzene 5.00 5.60 5.73 112 115 77.0-120 2.29 20 1,3,5-Trimethylbenzene 5.00 5.97 5.50 119 110 76.0-122 8.20 20 Vinyl acetate 25.0 13.7 12.6 54.8 50.4 11.0-160 8.37 20 Vinyl chloride 5.00 4.30 4.27 86.0 85.4 67.0-131 0.700 20 Xylenes, Total 15.0 17.3 16.9 115 113 79.0-123 2.34 20
(S) Toluene-d8 109 109 80.0-120
(S) 4-Bromofluorobenzene 105 104 77.0-126
(S) 1,2-Dichloroethane-d4 99.1 97.4 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 L1542630-01,02 Laboratory Control Sample (LCS)
(LCS) R3848053-4 10/10/22 14:07
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
1,4-Dioxane 1000 1060 106 13.0-160
(S) Toluene-d8 113 80.0-120
(S) 4-Bromofluorobenzene 110 77.0-126
(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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1542630 10/13/22 18:18 21 of 25 WG1935839 QUALITY CONTROL SUMMARY
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1542630-01,02 Method Blank (MB)
(MB) R3846117-1 10/06/22 08:55
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 93.0 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3846117-2 10/06/22 09:15 • (LCSD) R3846117-3 10/06/22 09:35 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 750 982 962 131 128 50.0-150 2.06 20 C22-C32 Hydrocarbons 750 1020 1010 136 135 50.0-150 0.985 20 (S) o-Terphenyl 106 100 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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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.

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.

J1 Surrogate recovery limits have been exceeded; values are outside upper control limits.

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. 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-015 L1542630 10/13/22 18:18 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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ANALYTICAL REPORT
October 17, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1543120
Samples Received: 10/05/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 17, 2022
[Preliminary Report]
Jennifer A McCurdy
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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 13:55 1 of 23 October 17, 2022
Jason Romer
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
SB-3-14-24 L1543120-01 6
SB-4-18-28 L1543120-02 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 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
SB-3-14-24 L1543120-01 GW N. MAROON 10/04/22 10:00 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1941079 1 10/11/22 23:15 10/11/22 23:15 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1940261 1 10/10/22 15:41 10/10/22 15:41 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1941333 1.33 10/13/22 13:06 10/14/22 05:01 HLJ Mt. Juliet, TN Collected by Collected date/time Received date/time
SB-4-18-28 L1543120-02 GW N. MAROON 10/04/22 10:30 10/05/22 08:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (GC) by Method 8015 WG1941079 1 10/11/22 23:38 10/11/22 23:38 JHH Mt. Juliet, TN Volatile Organic Compounds (GC/MS) by Method 8260B WG1940261 1 10/10/22 16:01 10/10/22 16:01 JAH Mt. Juliet, TN Semi-Volatile Organic Compounds (GC) by Method 3511/8015 WG1941333 1.33 10/13/22 13:06 10/14/22 05:22 HLJ 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]
Jennifer A McCurdy
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
WG1940261 (LCS) R3848944-1, (LCSD)
R3848944-2, L1543120-01, 02
4-Methyl-2-pentanone (MIBK) and Di-isopropyl ether
The associated batch QC was below the established quality control range for accuracy.

Batch Lab Sample ID Analytes
WG1940261 (LCS) R3848944-1, L1543120-01, 02 Iodomethane The associated batch QC was outside the established quality control range for precision.

Batch Lab Sample ID Analytes
WG1940261 (LCSD) R3848944-2, L1543120-01, 02 Bromomethane and Iodomethane The sample matrix interfered with the ability to make any accurate determination; spike value is high.

Batch Lab Sample ID Analytes
WG1940261 (MS) R3848944-5, (MS) R3848944-7,
(MSD) R3848944-6
4-Methyl-2-pentanone (MIBK) and Vinyl acetate
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-015 L1543120 10/17/22 13:55 4 of 23 Jason Romer
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
SB-3-14-24 L1543120-01 Trichloroethene 0.767 0.500 1 10/10/2022 15:41 WG1940261 SB-4-18-28 L1543120-02 Trichloroethene 2.29 0.500 1 10/10/2022 16:01 WG1940261 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-015 L1543120 10/17/22 14:18 5 of 23 SAMPLE RESULTS - 01
L1543120
SB-3-14-24
Collected date/time: 10/04/22 10:00
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 10/11/2022 23:15 WG1941079
(S) a,a,a-Trifluorotoluene(FID) 107 78.0-120 10/11/2022 23:15 WG1941079 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 10/10/2022 15:41 WG1940261
Acrylonitrile ND 5.00 1 10/10/2022 15:41 WG1940261
Benzene ND 0.500 1 10/10/2022 15:41 WG1940261
Bromobenzene ND 0.500 1 10/10/2022 15:41 WG1940261
Bromodichloromethane ND 0.500 1 10/10/2022 15:41 WG1940261 Bromochloromethane ND 0.500 1 10/10/2022 15:41 WG1940261 Bromoform ND 0.500 1 10/10/2022 15:41 WG1940261
Bromomethane ND J3 2.50 1 10/10/2022 15:41 WG1940261
n-Butylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261
sec-Butylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261
tert-Butylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261 Carbon disulfide ND 0.500 1 10/10/2022 15:41 WG1940261
Carbon tetrachloride ND 0.500 1 10/10/2022 15:41 WG1940261 Chlorobenzene ND 0.500 1 10/10/2022 15:41 WG1940261
Chlorodibromomethane ND 0.500 1 10/10/2022 15:41 WG1940261 Chloroethane ND 2.50 1 10/10/2022 15:41 WG1940261
Chloroform ND 0.500 1 10/10/2022 15:41 WG1940261
Chloromethane ND 1.25 1 10/10/2022 15:41 WG1940261
2-Chlorotoluene ND 0.500 1 10/10/2022 15:41 WG1940261
4-Chlorotoluene ND 0.500 1 10/10/2022 15:41 WG1940261
1,2-Dibromo-3-Chloropropane ND 2.50 1 10/10/2022 15:41 WG1940261 1,2-Dibromoethane ND 0.500 1 10/10/2022 15:41 WG1940261 Dibromomethane ND 0.500 1 10/10/2022 15:41 WG1940261
1,2-Dichlorobenzene ND 0.500 1 10/10/2022 15:41 WG1940261 1,3-Dichlorobenzene ND 0.500 1 10/10/2022 15:41 WG1940261 1,4-Dichlorobenzene ND 0.500 1 10/10/2022 15:41 WG1940261 Dichlorodifluoromethane ND 2.50 1 10/10/2022 15:41 WG1940261 1,1-Dichloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 1,2-Dichloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 1,1-Dichloroethene ND 0.500 1 10/10/2022 15:41 WG1940261 cis-1,2-Dichloroethene ND 0.500 1 10/10/2022 15:41 WG1940261 trans-1,2-Dichloroethene ND 0.500 1 10/10/2022 15:41 WG1940261 1,2-Dichloropropane ND 0.500 1 10/10/2022 15:41 WG1940261 1,1-Dichloropropene ND 0.500 1 10/10/2022 15:41 WG1940261 1,3-Dichloropropane ND 1.00 1 10/10/2022 15:41 WG1940261 cis-1,3-Dichloropropene ND 0.500 1 10/10/2022 15:41 WG1940261 trans-1,3-Dichloropropene ND 0.500 1 10/10/2022 15:41 WG1940261 trans-1,4-Dichloro-2-butene ND 5.00 1 10/10/2022 15:41 WG1940261 2,2-Dichloropropane ND 0.500 1 10/10/2022 15:41 WG1940261 Di-isopropyl ether ND J4 0.500 1 10/10/2022 15:41 WG1940261 Ethylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261
Hexachloro-1,3-butadiene ND 1.00 1 10/10/2022 15:41 WG1940261 2-Hexanone ND 5.00 1 10/10/2022 15:41 WG1940261
n-Hexane ND 5.00 1 10/10/2022 15:41 WG1940261
Iodomethane ND J3 J4 5.00 1 10/10/2022 15:41 WG1940261
Isopropylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261
p-Isopropyltoluene ND 0.500 1 10/10/2022 15:41 WG1940261 2-Butanone (MEK) ND 5.00 1 10/10/2022 15:41 WG1940261
Methylene Chloride ND 2.50 1 10/10/2022 15:41 WG1940261 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-015 L1543120 10/17/22 14:18 6 of 23 SAMPLE RESULTS - 01
L1543120
SB-3-14-24
Collected date/time: 10/04/22 10:00
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 J4 5.00 1 10/10/2022 15:41 WG1940261 Methyl tert-butyl ether ND 0.500 1 10/10/2022 15:41 WG1940261 Naphthalene ND 2.50 1 10/10/2022 15:41 WG1940261
n-Propylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261
Styrene ND 0.500 1 10/10/2022 15:41 WG1940261
1,1,1,2-Tetrachloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 1,1,2,2-Tetrachloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 1,1,2-Trichlorotrifluoroethane ND 0.500 1 10/10/2022 15:41 WG1940261 Tetrachloroethene ND 0.500 1 10/10/2022 15:41 WG1940261 Toluene ND 0.500 1 10/10/2022 15:41 WG1940261
1,2,3-Trichlorobenzene ND 0.500 1 10/10/2022 15:41 WG1940261 1,2,4-Trichlorobenzene ND 1.00 1 10/10/2022 15:41 WG1940261 1,1,1-Trichloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 1,1,2-Trichloroethane ND 0.500 1 10/10/2022 15:41 WG1940261 Trichloroethene 0.767 0.500 1 10/10/2022 15:41 WG1940261 Trichlorofluoromethane ND 2.50 1 10/10/2022 15:41 WG1940261 1,2,3-Trichloropropane ND 2.50 1 10/10/2022 15:41 WG1940261 1,2,4-Trimethylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261 1,2,3-Trimethylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261 1,3,5-Trimethylbenzene ND 0.500 1 10/10/2022 15:41 WG1940261 Vinyl acetate ND 5.00 1 10/10/2022 15:41 WG1940261
Vinyl chloride ND 0.500 1 10/10/2022 15:41 WG1940261
Xylenes, Total ND 1.50 1 10/10/2022 15:41 WG1940261
1,4-Dioxane ND 100 1 10/10/2022 15:41 WG1940261
(S) Toluene-d8 111 80.0-120 10/10/2022 15:41 WG1940261
(S) 4-Bromofluorobenzene 105 77.0-126 10/10/2022 15:41 WG1940261 (S) 1,2-Dichloroethane-d4 112 70.0-130 10/10/2022 15:41 WG1940261 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 133 1.33 10/14/2022 05:01 WG1941333 C22-C32 Hydrocarbons ND 133 1.33 10/14/2022 05:01 WG1941333 C32-C40 Hydrocarbons ND 133 1.33 10/14/2022 05:01 WG1941333 (S) o-Terphenyl 79.8 52.0-156 10/14/2022 05:01 WG1941333 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1543120
SB-4-18-28
Collected date/time: 10/04/22 10:30
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 10/11/2022 23:38 WG1941079
(S) a,a,a-Trifluorotoluene(FID) 107 78.0-120 10/11/2022 23:38 WG1941079 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 10/10/2022 16:01 WG1940261
Acrylonitrile ND 5.00 1 10/10/2022 16:01 WG1940261
Benzene ND 0.500 1 10/10/2022 16:01 WG1940261
Bromobenzene ND 0.500 1 10/10/2022 16:01 WG1940261
Bromodichloromethane ND 0.500 1 10/10/2022 16:01 WG1940261 Bromochloromethane ND 0.500 1 10/10/2022 16:01 WG1940261 Bromoform ND 0.500 1 10/10/2022 16:01 WG1940261
Bromomethane ND J3 2.50 1 10/10/2022 16:01 WG1940261
n-Butylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261
sec-Butylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261
tert-Butylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261 Carbon disulfide ND 0.500 1 10/10/2022 16:01 WG1940261
Carbon tetrachloride ND 0.500 1 10/10/2022 16:01 WG1940261 Chlorobenzene ND 0.500 1 10/10/2022 16:01 WG1940261
Chlorodibromomethane ND 0.500 1 10/10/2022 16:01 WG1940261 Chloroethane ND 2.50 1 10/10/2022 16:01 WG1940261
Chloroform ND 0.500 1 10/10/2022 16:01 WG1940261
Chloromethane ND 1.25 1 10/10/2022 16:01 WG1940261
2-Chlorotoluene ND 0.500 1 10/10/2022 16:01 WG1940261
4-Chlorotoluene ND 0.500 1 10/10/2022 16:01 WG1940261
1,2-Dibromo-3-Chloropropane ND 2.50 1 10/10/2022 16:01 WG1940261 1,2-Dibromoethane ND 0.500 1 10/10/2022 16:01 WG1940261 Dibromomethane ND 0.500 1 10/10/2022 16:01 WG1940261
1,2-Dichlorobenzene ND 0.500 1 10/10/2022 16:01 WG1940261 1,3-Dichlorobenzene ND 0.500 1 10/10/2022 16:01 WG1940261 1,4-Dichlorobenzene ND 0.500 1 10/10/2022 16:01 WG1940261 Dichlorodifluoromethane ND 2.50 1 10/10/2022 16:01 WG1940261 1,1-Dichloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 1,2-Dichloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 1,1-Dichloroethene ND 0.500 1 10/10/2022 16:01 WG1940261 cis-1,2-Dichloroethene ND 0.500 1 10/10/2022 16:01 WG1940261 trans-1,2-Dichloroethene ND 0.500 1 10/10/2022 16:01 WG1940261 1,2-Dichloropropane ND 0.500 1 10/10/2022 16:01 WG1940261 1,1-Dichloropropene ND 0.500 1 10/10/2022 16:01 WG1940261 1,3-Dichloropropane ND 1.00 1 10/10/2022 16:01 WG1940261 cis-1,3-Dichloropropene ND 0.500 1 10/10/2022 16:01 WG1940261 trans-1,3-Dichloropropene ND 0.500 1 10/10/2022 16:01 WG1940261 trans-1,4-Dichloro-2-butene ND 5.00 1 10/10/2022 16:01 WG1940261 2,2-Dichloropropane ND 0.500 1 10/10/2022 16:01 WG1940261 Di-isopropyl ether ND J4 0.500 1 10/10/2022 16:01 WG1940261 Ethylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261
Hexachloro-1,3-butadiene ND 1.00 1 10/10/2022 16:01 WG1940261 2-Hexanone ND 5.00 1 10/10/2022 16:01 WG1940261
n-Hexane ND 5.00 1 10/10/2022 16:01 WG1940261
Iodomethane ND J3 J4 5.00 1 10/10/2022 16:01 WG1940261
Isopropylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261
p-Isopropyltoluene ND 0.500 1 10/10/2022 16:01 WG1940261 2-Butanone (MEK) ND 5.00 1 10/10/2022 16:01 WG1940261
Methylene Chloride ND 2.50 1 10/10/2022 16:01 WG1940261 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1543120
SB-4-18-28
Collected date/time: 10/04/22 10:30
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 J4 5.00 1 10/10/2022 16:01 WG1940261 Methyl tert-butyl ether ND 0.500 1 10/10/2022 16:01 WG1940261 Naphthalene ND 2.50 1 10/10/2022 16:01 WG1940261
n-Propylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261
Styrene ND 0.500 1 10/10/2022 16:01 WG1940261
1,1,1,2-Tetrachloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 1,1,2,2-Tetrachloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 1,1,2-Trichlorotrifluoroethane ND 0.500 1 10/10/2022 16:01 WG1940261 Tetrachloroethene ND 0.500 1 10/10/2022 16:01 WG1940261 Toluene ND 0.500 1 10/10/2022 16:01 WG1940261
1,2,3-Trichlorobenzene ND 0.500 1 10/10/2022 16:01 WG1940261 1,2,4-Trichlorobenzene ND 1.00 1 10/10/2022 16:01 WG1940261 1,1,1-Trichloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 1,1,2-Trichloroethane ND 0.500 1 10/10/2022 16:01 WG1940261 Trichloroethene 2.29 0.500 1 10/10/2022 16:01 WG1940261 Trichlorofluoromethane ND 2.50 1 10/10/2022 16:01 WG1940261 1,2,3-Trichloropropane ND 2.50 1 10/10/2022 16:01 WG1940261 1,2,4-Trimethylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261 1,2,3-Trimethylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261 1,3,5-Trimethylbenzene ND 0.500 1 10/10/2022 16:01 WG1940261 Vinyl acetate ND 5.00 1 10/10/2022 16:01 WG1940261
Vinyl chloride ND 0.500 1 10/10/2022 16:01 WG1940261
Xylenes, Total ND 1.50 1 10/10/2022 16:01 WG1940261
1,4-Dioxane ND 100 1 10/10/2022 16:01 WG1940261
(S) Toluene-d8 109 80.0-120 10/10/2022 16:01 WG1940261
(S) 4-Bromofluorobenzene 104 77.0-126 10/10/2022 16:01 WG1940261 (S) 1,2-Dichloroethane-d4 115 70.0-130 10/10/2022 16:01 WG1940261 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 133 1.33 10/14/2022 05:22 WG1941333 C22-C32 Hydrocarbons ND 133 1.33 10/14/2022 05:22 WG1941333 C32-C40 Hydrocarbons ND 133 1.33 10/14/2022 05:22 WG1941333 (S) o-Terphenyl 78.7 52.0-156 10/14/2022 05:22 WG1941333 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-015 L1543120 10/17/22 14:18 9 of 23 WG1941079 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC) by Method 8015 L1543120-01,02 Method Blank (MB)
(MB) R3849351-3 10/11/22 21:44
MB Result MB Qualifier MB MDL MB RDL
Analyte ug/l ug/l ug/l
TPHG C5 - C12 50.0 J 30.4 100
(S)
a,a,a-Trifluorotoluene(FID) 106 78.0-120
Laboratory Control Sample (LCS)
(LCS) R3849351-2 10/11/22 19:51
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
TPHG C5 - C12 5500 5560 101 71.0-127
(S)
a,a,a-Trifluorotoluene(FID) 115 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 14:18 10 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 Method Blank (MB)
(MB) R3848944-4 10/10/22 12:05
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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 14:18 11 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 Method Blank (MB)
(MB) R3848944-4 10/10/22 12:05
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 0.592 J 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 12.7 J 2.83 100
(S) Toluene-d8 110 80.0-120
(S) 4-Bromofluorobenzene 103 77.0-126
(S) 1,2-Dichloroethane-d4 112 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 14:18 12 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3848944-1 10/10/22 10:21 • (LCSD) R3848944-2 10/10/22 10:42 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 % % % % %
Acetone 25.0 34.4 33.5 138 134 19.0-160 2.65 27
Acrylonitrile 25.0 31.2 33.2 125 133 55.0-149 6.21 20
Benzene 5.00 5.49 5.35 110 107 70.0-123 2.58 20
Bromobenzene 5.00 5.86 5.85 117 117 73.0-121 0.171 20
Bromodichloromethane 5.00 5.11 5.17 102 103 75.0-120 1.17 20 Bromochloromethane 5.00 5.08 4.94 102 98.8 76.0-122 2.79 20 Bromoform 5.00 4.90 4.94 98.0 98.8 68.0-132 0.813 20
Bromomethane 5.00 1.26 1.68 25.2 33.6 10.0-160 J3 28.6 25 n-Butylbenzene 5.00 4.92 5.03 98.4 101 73.0-125 2.21 20 sec-Butylbenzene 5.00 5.14 5.26 103 105 75.0-125 2.31 20 tert-Butylbenzene 5.00 4.84 4.84 96.8 96.8 76.0-124 0.000 20 Carbon disulfide 5.00 5.12 5.19 102 104 61.0-128 1.36 20 Carbon tetrachloride 5.00 5.09 5.18 102 104 68.0-126 1.75 20 Chlorobenzene 5.00 5.12 5.07 102 101 80.0-121 0.981 20
Chlorodibromomethane 5.00 4.93 4.72 98.6 94.4 77.0-125 4.35 20 Chloroethane 5.00 4.97 4.52 99.4 90.4 47.0-150 9.48 20
Chloroform 5.00 5.36 5.21 107 104 73.0-120 2.84 20
Chloromethane 5.00 6.26 6.16 125 123 41.0-142 1.61 20
2-Chlorotoluene 5.00 5.31 5.25 106 105 76.0-123 1.14 20 4-Chlorotoluene 5.00 5.27 5.39 105 108 75.0-122 2.25 20 1,2-Dibromo-3-Chloropropane 5.00 4.60 5.24 92.0 105 58.0-134 13.0 20 1,2-Dibromoethane 5.00 5.52 5.48 110 110 80.0-122 0.727 20 Dibromomethane 5.00 5.26 5.10 105 102 80.0-120 3.09 20
1,2-Dichlorobenzene 5.00 5.48 5.59 110 112 79.0-121 1.99 20 1,3-Dichlorobenzene 5.00 5.55 5.33 111 107 79.0-120 4.04 20 1,4-Dichlorobenzene 5.00 5.57 5.46 111 109 79.0-120 1.99 20 Dichlorodifluoromethane 5.00 5.41 5.26 108 105 51.0-149 2.81 20 1,1-Dichloroethane 5.00 5.71 5.76 114 115 70.0-126 0.872 20 1,2-Dichloroethane 5.00 5.37 5.41 107 108 70.0-128 0.742 20 1,1-Dichloroethene 5.00 5.31 5.30 106 106 71.0-124 0.189 20 cis-1,2-Dichloroethene 5.00 4.94 5.26 98.8 105 73.0-120 6.27 20 trans-1,2-Dichloroethene 5.00 5.07 5.00 101 100 73.0-120 1.39 20 1,2-Dichloropropane 5.00 5.81 5.72 116 114 77.0-125 1.56 20 1,1-Dichloropropene 5.00 5.29 5.45 106 109 74.0-126 2.98 20 1,3-Dichloropropane 5.00 5.82 5.99 116 120 80.0-120 2.88 20 cis-1,3-Dichloropropene 5.00 5.34 5.34 107 107 80.0-123 0.000 20 trans-1,3-Dichloropropene 5.00 5.48 5.56 110 111 78.0-124 1.45 20 trans-1,4-Dichloro-2-butene 5.00 5.06 5.20 101 104 33.0-144 2.73 20 2,2-Dichloropropane 5.00 5.30 5.06 106 101 58.0-130 4.63 20 Di-isopropyl ether 5.00 7.16 7.01 143 140 58.0-138 J4 J4 2.12 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-015 L1543120 10/17/22 14:18 13 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3848944-1 10/10/22 10:21 • (LCSD) R3848944-2 10/10/22 10:42 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 % % % % %
Ethylbenzene 5.00 4.93 4.78 98.6 95.6 79.0-123 3.09 20
Hexachloro-1,3-butadiene 5.00 5.39 5.55 108 111 54.0-138 2.93 20 2-Hexanone 25.0 28.3 28.6 113 114 67.0-149 1.05 20
n-Hexane 5.00 5.56 5.51 111 110 57.0-133 0.903 20
Iodomethane 25.0 7.15 10.6 28.6 42.4 33.0-147 J4 J3 38.9 26 Isopropylbenzene 5.00 4.91 4.83 98.2 96.6 76.0-127 1.64 20 p-Isopropyltoluene 5.00 5.09 5.09 102 102 76.0-125 0.000 20 2-Butanone (MEK) 25.0 34.4 34.8 138 139 44.0-160 1.16 20 Methylene Chloride 5.00 5.73 5.41 115 108 67.0-120 5.75 20 4-Methyl-2-pentanone (MIBK) 25.0 36.1 36.2 144 145 68.0-142 J4 J4 0.277 20 Methyl tert-butyl ether 5.00 5.40 5.44 108 109 68.0-125 0.738 20 Naphthalene 5.00 5.19 5.18 104 104 54.0-135 0.193 20
n-Propylbenzene 5.00 5.30 5.17 106 103 77.0-124 2.48 20 Styrene 5.00 4.75 4.82 95.0 96.4 73.0-130 1.46 20
1,1,1,2-Tetrachloroethane 5.00 5.10 5.14 102 103 75.0-125 0.781 20 1,1,2,2-Tetrachloroethane 5.00 6.19 6.23 124 125 65.0-130 0.644 20 1,1,2-Trichlorotrifluoroethane 5.00 5.58 5.56 112 111 69.0-132 0.359 20 Tetrachloroethene 5.00 4.99 5.02 99.8 100 72.0-132 0.599 20 Toluene 5.00 5.30 5.24 106 105 79.0-120 1.14 20
1,2,3-Trichlorobenzene 5.00 5.17 5.94 103 119 50.0-138 13.9 20 1,2,4-Trichlorobenzene 5.00 4.82 5.12 96.4 102 57.0-137 6.04 20 1,1,1-Trichloroethane 5.00 5.14 5.39 103 108 73.0-124 4.75 20 1,1,2-Trichloroethane 5.00 5.43 5.45 109 109 80.0-120 0.368 20 Trichloroethene 5.00 4.70 4.68 94.0 93.6 78.0-124 0.426 20 Trichlorofluoromethane 5.00 5.43 5.35 109 107 59.0-147 1.48 20 1,2,3-Trichloropropane 5.00 6.11 5.68 122 114 73.0-130 7.29 20 1,2,4-Trimethylbenzene 5.00 5.36 5.21 107 104 76.0-121 2.84 20 1,2,3-Trimethylbenzene 5.00 5.38 5.34 108 107 77.0-120 0.746 20 1,3,5-Trimethylbenzene 5.00 5.20 5.10 104 102 76.0-122 1.94 20 Vinyl acetate 25.0 38.9 37.2 156 149 11.0-160 4.47 20
Vinyl chloride 5.00 5.64 5.47 113 109 67.0-131 3.06 20
Xylenes, Total 15.0 14.7 14.7 98.0 98.0 79.0-123 0.000 20 (S) Toluene-d8 108 106 80.0-120
(S) 4-Bromofluorobenzene 105 103 77.0-126
(S) 1,2-Dichloroethane-d4 114 109 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 14:18 14 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 Laboratory Control Sample (LCS)
(LCS) R3848944-3 10/10/22 11:24
Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier Analyte ug/l ug/l % %
1,4-Dioxane 1000 1070 107 13.0-160
(S) Toluene-d8 107 80.0-120
(S) 4-Bromofluorobenzene 105 77.0-126
(S) 1,2-Dichloroethane-d4 110 70.0-130
L1543452-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-02 10/10/22 16:43 • (MS) R3848944-5 10/10/22 21:10 • (MSD) R3848944-6 10/10/22 21:31 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 % % % % %
Acetone 25.0 ND 36.3 31.4 145 126 1 10.0-160 14.5 35
Acrylonitrile 25.0 ND 36.7 31.5 147 126 1 21.0-160 15.2 32 Benzene 5.00 ND 4.13 3.74 82.6 74.8 1 17.0-158 9.91 27
Bromobenzene 5.00 ND 5.13 4.53 103 90.6 1 30.0-149 12.4 28 Bromodichloromethane 5.00 ND 4.69 4.20 93.8 84.0 1 31.0-150 11.0 27 Bromochloromethane 5.00 ND 4.47 3.84 89.4 76.8 1 38.0-142 15.2 26 Bromoform 5.00 ND 4.79 4.32 95.8 86.4 1 29.0-150 10.3 29 Bromomethane 5.00 ND ND ND 22.6 23.8 1 10.0-160 5.17 38 n-Butylbenzene 5.00 ND 4.19 3.59 83.8 71.8 1 31.0-150 15.4 30 sec-Butylbenzene 5.00 ND 4.44 3.92 88.8 78.4 1 33.0-155 12.4 29 tert-Butylbenzene 5.00 ND 4.25 3.66 85.0 73.2 1 34.0-153 14.9 28 Carbon disulfide 5.00 ND 2.73 2.58 51.9 48.9 1 10.0-156 5.65 28 Carbon tetrachloride 5.00 ND 3.87 3.59 77.4 71.8 1 23.0-159 7.51 28 Chlorobenzene 5.00 ND 4.16 3.79 83.2 75.8 1 33.0-152 9.31 27 Chlorodibromomethane 5.00 ND 4.58 4.13 91.6 82.6 1 37.0-149 10.3 27 Chloroethane 5.00 ND 3.31 3.23 66.2 64.6 1 10.0-160 2.45 30 Chloroform 5.00 ND 4.47 3.95 89.4 79.0 1 29.0-154 12.4 28 Chloromethane 5.00 ND 3.92 3.56 78.4 71.2 1 10.0-160 9.63 29 2-Chlorotoluene 5.00 ND 4.41 3.97 88.2 79.4 1 32.0-153 10.5 28 4-Chlorotoluene 5.00 ND 4.59 3.99 91.8 79.8 1 32.0-150 14.0 28 1,2-Dibromo-3-Chloropropane 5.00 ND 5.68 4.95 114 99.0 1 22.0-151 13.7 34 1,2-Dibromoethane 5.00 ND 5.20 4.70 104 94.0 1 34.0-147 10.1 27 Dibromomethane 5.00 ND 4.84 4.37 96.8 87.4 1 30.0-151 10.2 27 1,2-Dichlorobenzene 5.00 ND 5.20 4.65 104 93.0 1 34.0-149 11.2 28 1,3-Dichlorobenzene 5.00 ND 4.94 4.26 98.8 85.2 1 36.0-146 14.8 27 1,4-Dichlorobenzene 5.00 ND 5.08 4.44 102 88.8 1 35.0-142 13.4 27 Dichlorodifluoromethane 5.00 ND 3.04 2.97 60.8 59.4 1 10.0-160 2.33 29 1,1-Dichloroethane 5.00 ND 4.60 4.09 92.0 81.8 1 25.0-158 11.7 27 1,2-Dichloroethane 5.00 ND 4.84 4.42 96.8 88.4 1 29.0-151 9.07 27 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-015 L1543120 10/17/22 14:18 15 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 L1543452-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-02 10/10/22 16:43 • (MS) R3848944-5 10/10/22 21:10 • (MSD) R3848944-6 10/10/22 21:31 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 % % % % %
1,1-Dichloroethene 5.00 ND 3.58 3.45 71.6 69.0 1 11.0-160 3.70 29 cis-1,2-Dichloroethene 5.00 ND 4.04 3.54 80.8 70.8 1 10.0-160 13.2 27 trans-1,2-Dichloroethene 5.00 ND 3.36 3.27 67.2 65.4 1 17.0-153 2.71 27 1,2-Dichloropropane 5.00 ND 4.77 4.58 95.4 91.6 1 30.0-156 4.06 27 1,1-Dichloropropene 5.00 ND 3.82 3.57 76.4 71.4 1 25.0-158 6.77 27 1,3-Dichloropropane 5.00 ND 5.51 4.92 110 98.4 1 38.0-147 11.3 27 cis-1,3-Dichloropropene 5.00 ND 4.69 4.19 93.8 83.8 1 34.0-149 11.3 28 trans-1,3-Dichloropropene 5.00 ND 5.14 4.62 103 92.4 1 32.0-149 10.7 28 trans-1,4-Dichloro-2-butene 5.00 ND 6.14 5.21 123 104 1 10.0-157 16.4 37 2,2-Dichloropropane 5.00 ND 4.04 3.76 80.8 75.2 1 24.0-152 7.18 29 Di-isopropyl ether 5.00 ND 6.63 6.06 133 121 1 21.0-160 8.98 28 Ethylbenzene 5.00 ND 3.84 3.41 76.8 68.2 1 30.0-155 11.9 27 Hexachloro-1,3-butadiene 5.00 ND 5.33 4.61 107 92.2 1 20.0-154 14.5 34 2-Hexanone 25.0 ND 30.3 28.3 121 113 1 21.0-160 6.83 29 n-Hexane 5.00 ND ND ND 74.4 68.6 1 10.0-153 8.11 28
Iodomethane 25.0 ND 5.60 6.23 22.4 24.9 1 10.0-160 10.7 40 Isopropylbenzene 5.00 ND 3.78 3.33 75.6 66.6 1 28.0-157 12.7 27 p-Isopropyltoluene 5.00 ND 4.38 3.76 87.6 75.2 1 30.0-154 15.2 29 2-Butanone (MEK) 25.0 ND 39.1 33.6 156 134 1 10.0-160 15.1 32 Methylene Chloride 5.00 ND 4.57 4.06 91.4 81.2 1 23.0-144 11.8 28 4-Methyl-2-pentanone (MIBK) 25.0 ND 40.9 35.7 164 143 1 29.0-160 J5 13.6 29 Methyl tert-butyl ether 5.00 ND 5.28 4.79 106 95.8 1 28.0-150 9.73 29 Naphthalene 5.00 ND 3.41 4.43 68.2 88.6 1 12.0-156 26.0 35 n-Propylbenzene 5.00 ND 4.36 3.73 87.2 74.6 1 31.0-154 15.6 28 Styrene 5.00 ND 3.71 3.49 74.2 69.8 1 33.0-155 6.11 28
1,1,1,2-Tetrachloroethane 5.00 ND 4.41 3.82 88.2 76.4 1 36.0-151 14.3 29 1,1,2,2-Tetrachloroethane 5.00 ND 7.08 6.20 142 124 1 33.0-150 13.3 28 1,1,2-Trichlorotrifluoroethane 5.00 ND 3.96 3.90 79.2 78.0 1 23.0-160 1.53 30 Tetrachloroethene 5.00 ND 3.71 3.40 74.2 68.0 1 10.0-160 8.72 27 Toluene 5.00 ND 4.01 3.62 80.2 72.4 1 26.0-154 10.2 28
1,2,3-Trichlorobenzene 5.00 ND 5.06 5.29 101 106 1 17.0-150 4.44 36 1,2,4-Trichlorobenzene 5.00 ND 4.25 4.08 85.0 81.6 1 24.0-150 4.08 33 1,1,1-Trichloroethane 5.00 ND 4.01 3.79 80.2 75.8 1 23.0-160 5.64 28 1,1,2-Trichloroethane 5.00 ND 5.27 4.92 105 98.4 1 35.0-147 6.87 27 Trichloroethene 5.00 ND 3.45 3.19 69.0 63.8 1 10.0-160 7.83 25 Trichlorofluoromethane 5.00 ND 3.71 3.55 74.2 71.0 1 17.0-160 4.41 31 1,2,3-Trichloropropane 5.00 ND 6.80 5.57 136 111 1 34.0-151 19.9 29 1,2,4-Trimethylbenzene 5.00 ND 4.28 3.65 85.6 73.0 1 26.0-154 15.9 27 1,2,3-Trimethylbenzene 5.00 ND 4.81 4.15 96.2 83.0 1 32.0-149 14.7 28 1,3,5-Trimethylbenzene 5.00 ND 4.34 3.65 86.8 73.0 1 28.0-153 17.3 27 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-015 L1543120 10/17/22 14:18 16 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 L1543452-02 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-02 10/10/22 16:43 • (MS) R3848944-5 10/10/22 21:10 • (MSD) R3848944-6 10/10/22 21:31 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 % % % % %
Vinyl acetate 25.0 ND 51.9 45.6 208 182 1 12.0-160 J5 J5 12.9 31 Vinyl chloride 5.00 ND 3.69 3.40 73.8 68.0 1 10.0-160 8.18 27 Xylenes, Total 15.0 ND 11.4 10.3 76.0 68.7 1 29.0-154 10.1 28 (S) Toluene-d8 105 106 80.0-120
(S) 4-Bromofluorobenzene 101 101 77.0-126
(S) 1,2-Dichloroethane-d4 113 115 70.0-130
L1543452-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-03 10/10/22 17:03 • (MS) R3848944-7 10/10/22 21:51 • (MSD) R3848944-8 10/10/22 22:12 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 % % % % %
Acetone 25.0 ND 29.1 27.2 116 109 1 10.0-160 6.75 35
Acrylonitrile 25.0 ND 29.9 27.5 120 110 1 21.0-160 8.36 32 Benzene 5.00 ND 3.81 3.72 76.2 74.4 1 17.0-158 2.39 27
Bromobenzene 5.00 ND 4.63 4.38 92.6 87.6 1 30.0-149 5.55 28 Bromodichloromethane 5.00 ND 4.00 3.83 80.0 76.6 1 31.0-150 4.34 27 Bromochloromethane 5.00 ND 3.77 3.62 75.4 72.4 1 38.0-142 4.06 26 Bromoform 5.00 ND 3.96 3.90 79.2 78.0 1 29.0-150 1.53 29 Bromomethane 5.00 ND ND ND 23.6 24.2 1 10.0-160 2.51 38 n-Butylbenzene 5.00 ND 4.16 3.81 83.2 76.2 1 31.0-150 8.78 30 sec-Butylbenzene 5.00 ND 3.98 3.80 79.6 76.0 1 33.0-155 4.63 29 tert-Butylbenzene 5.00 ND 3.86 3.67 77.2 73.4 1 34.0-153 5.05 28 Carbon disulfide 5.00 ND 2.51 2.58 50.2 51.6 1 10.0-156 2.75 28 Carbon tetrachloride 5.00 ND 3.43 3.84 68.6 76.8 1 23.0-159 11.3 28 Chlorobenzene 5.00 ND 3.71 3.71 74.2 74.2 1 33.0-152 0.000 27 Chlorodibromomethane 5.00 ND 3.68 3.71 73.6 74.2 1 37.0-149 0.812 27 Chloroethane 5.00 ND 2.93 3.32 58.6 66.4 1 10.0-160 12.5 30 Chloroform 5.00 ND 3.97 3.77 79.4 75.4 1 29.0-154 5.17 28 Chloromethane 5.00 ND 3.64 3.61 72.8 72.2 1 10.0-160 0.828 29 2-Chlorotoluene 5.00 ND 3.99 3.95 79.8 79.0 1 32.0-153 1.01 28 4-Chlorotoluene 5.00 ND 3.92 3.92 78.4 78.4 1 32.0-150 0.000 28 1,2-Dibromo-3-Chloropropane 5.00 ND 4.80 4.46 96.0 89.2 1 22.0-151 7.34 34 1,2-Dibromoethane 5.00 ND 4.11 4.14 82.2 82.8 1 34.0-147 0.727 27 Dibromomethane 5.00 ND 4.00 3.83 80.0 76.6 1 30.0-151 4.34 27 1,2-Dichlorobenzene 5.00 ND 4.59 4.40 91.8 88.0 1 34.0-149 4.23 28 1,3-Dichlorobenzene 5.00 ND 4.17 4.09 83.4 81.8 1 36.0-146 1.94 27 1,4-Dichlorobenzene 5.00 ND 4.39 4.26 87.8 85.2 1 35.0-142 3.01 27 Dichlorodifluoromethane 5.00 ND 2.97 3.16 59.4 63.2 1 10.0-160 6.20 29 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-015 L1543120 10/17/22 14:18 17 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 L1543452-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-03 10/10/22 17:03 • (MS) R3848944-7 10/10/22 21:51 • (MSD) R3848944-8 10/10/22 22:12 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 % % % % %
1,1-Dichloroethane 5.00 ND 4.20 4.01 84.0 80.2 1 25.0-158 4.63 27 1,2-Dichloroethane 5.00 ND 4.31 3.98 86.2 79.6 1 29.0-151 7.96 27 1,1-Dichloroethene 5.00 ND 3.51 3.54 70.2 70.8 1 11.0-160 0.851 29 cis-1,2-Dichloroethene 5.00 ND 3.69 3.68 73.8 73.6 1 10.0-160 0.271 27 trans-1,2-Dichloroethene 5.00 ND 3.33 3.29 66.6 65.8 1 17.0-153 1.21 27 1,2-Dichloropropane 5.00 ND 4.09 3.98 81.8 79.6 1 30.0-156 2.73 27 1,1-Dichloropropene 5.00 ND 3.61 3.68 72.2 73.6 1 25.0-158 1.92 27 1,3-Dichloropropane 5.00 ND 4.62 4.59 92.4 91.8 1 38.0-147 0.651 27 cis-1,3-Dichloropropene 5.00 ND 3.62 3.52 72.4 70.4 1 34.0-149 2.80 28 trans-1,3-Dichloropropene 5.00 ND 3.93 4.05 78.6 81.0 1 32.0-149 3.01 28 trans-1,4-Dichloro-2-butene 5.00 ND 5.04 ND 101 92.0 1 10.0-157 9.13 37 2,2-Dichloropropane 5.00 ND 3.55 3.72 71.0 74.4 1 24.0-152 4.68 29 Di-isopropyl ether 5.00 ND 5.48 5.48 110 110 1 21.0-160 0.000 28 Ethylbenzene 5.00 ND 3.49 3.50 69.8 70.0 1 30.0-155 0.286 27 Hexachloro-1,3-butadiene 5.00 ND 4.50 4.26 90.0 85.2 1 20.0-154 5.48 34 2-Hexanone 25.0 ND 25.4 23.9 102 95.6 1 21.0-160 6.09 29 n-Hexane 5.00 ND ND ND 70.8 64.0 1 10.0-153 10.1 28
Iodomethane 25.0 ND 6.91 7.05 27.6 28.2 1 10.0-160 2.01 40 Isopropylbenzene 5.00 ND 3.31 3.42 66.2 68.4 1 28.0-157 3.27 27 p-Isopropyltoluene 5.00 ND 3.86 3.70 77.2 74.0 1 30.0-154 4.23 29 2-Butanone (MEK) 25.0 ND 31.9 28.5 128 114 1 10.0-160 11.3 32 Methylene Chloride 5.00 ND 3.89 3.91 77.8 78.2 1 23.0-144 0.513 28 4-Methyl-2-pentanone (MIBK) 25.0 ND 32.1 30.4 128 122 1 29.0-160 5.44 29 Methyl tert-butyl ether 5.00 ND 4.72 4.29 94.4 85.8 1 28.0-150 9.54 29 Naphthalene 5.00 ND 3.92 3.53 78.4 70.6 1 12.0-156 10.5 35 n-Propylbenzene 5.00 ND 3.93 3.78 78.6 75.6 1 31.0-154 3.89 28 Styrene 5.00 ND 3.08 3.24 61.6 64.8 1 33.0-155 5.06 28
1,1,1,2-Tetrachloroethane 5.00 ND 3.84 3.80 76.8 76.0 1 36.0-151 1.05 29 1,1,2,2-Tetrachloroethane 5.00 ND 5.74 5.34 115 107 1 33.0-150 7.22 28 1,1,2-Trichlorotrifluoroethane 5.00 ND 4.08 4.01 81.6 80.2 1 23.0-160 1.73 30 Tetrachloroethene 5.00 ND 3.18 3.43 63.6 68.6 1 10.0-160 7.56 27 Toluene 5.00 ND 3.52 3.63 70.4 72.6 1 26.0-154 3.08 28
1,2,3-Trichlorobenzene 5.00 ND 4.98 4.51 99.6 90.2 1 17.0-150 9.91 36 1,2,4-Trichlorobenzene 5.00 ND 4.36 4.00 87.2 80.0 1 24.0-150 8.61 33 1,1,1-Trichloroethane 5.00 ND 3.74 3.94 74.8 78.8 1 23.0-160 5.21 28 1,1,2-Trichloroethane 5.00 ND 4.52 4.45 90.4 89.0 1 35.0-147 1.56 27 Trichloroethene 5.00 ND 3.10 3.28 62.0 65.6 1 10.0-160 5.64 25 Trichlorofluoromethane 5.00 ND 3.67 3.75 73.4 75.0 1 17.0-160 2.16 31 1,2,3-Trichloropropane 5.00 ND 5.50 5.15 110 103 1 34.0-151 6.57 29 1,2,4-Trimethylbenzene 5.00 ND 3.84 3.65 76.8 73.0 1 26.0-154 5.07 27 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-015 L1543120 10/17/22 14:18 18 of 23 WG1940261 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (GC/MS) by Method 8260B L1543120-01,02 L1543452-03 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD) (OS) L1543452-03 10/10/22 17:03 • (MS) R3848944-7 10/10/22 21:51 • (MSD) R3848944-8 10/10/22 22:12 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 % % % % %
1,2,3-Trimethylbenzene 5.00 ND 3.92 3.89 78.4 77.8 1 32.0-149 0.768 28 1,3,5-Trimethylbenzene 5.00 ND 3.71 3.64 74.2 72.8 1 28.0-153 1.90 27 Vinyl acetate 25.0 ND 43.0 40.0 172 160 1 12.0-160 J5 7.23 31 Vinyl chloride 5.00 ND 3.33 3.50 66.6 70.0 1 10.0-160 4.98 27 Xylenes, Total 15.0 ND 9.82 9.97 65.5 66.5 1 29.0-154 1.52 28 (S) Toluene-d8 104 105 80.0-120
(S) 4-Bromofluorobenzene 101 103 77.0-126
(S) 1,2-Dichloroethane-d4 116 112 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1543120 10/17/22 14:18 19 of 23 WG1941333 QUALITY CONTROL SUMMARY
Semi-Volatile Organic Compounds (GC) by Method 3511/8015 L1543120-01,02 Method Blank (MB)
(MB) R3848481-1 10/14/22 04:01
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 74.5 52.0-156
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3848481-2 10/14/22 04:21 • (LCSD) R3848481-3 10/14/22 04:41 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 750 775 792 103 106 50.0-150 2.17 20 C22-C32 Hydrocarbons 750 822 823 110 110 50.0-150 0.122 20 (S) o-Terphenyl 84.5 82.0 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.

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.

J3 The associated batch QC was outside the established quality control range for precision.

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. 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-015 L1543120 10/17/22 14:18 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
October 12, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1544053
Samples Received: 10/07/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 12, 2022
[Preliminary Report]
Jennifer A McCurdy
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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Jennifer A McCurdy
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 8
SVP-1 L1544053-01 8
SVP-2-S L1544053-02 10
SVP-2-D L1544053-03 12
SVP-3-S L1544053-04 14
SVP-3-D L1544053-05 16
SVP-4 L1544053-06 18
Qc: Quality Control Summary 20
Volatile Organic Compounds (MS) by Method TO-15 20
Organic Compounds (GC) by Method D1946 25
Gl: Glossary of Terms 26
Al: Accreditations & Locations 27
Sc: Sample Chain of Custody 28
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-1 L1544053-01 Air N Maroon 10/06/22 10:00 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/10/22 21:56 10/10/22 21:56 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 11:50 10/11/22 11:50 CMS Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-2-S L1544053-02 Air N Maroon 10/06/22 11:32 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/10/22 22:40 10/10/22 22:40 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 11:54 10/11/22 11:54 CMS Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-2-D L1544053-03 Air N Maroon 10/06/22 12:17 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/10/22 23:24 10/10/22 23:24 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 11:58 10/11/22 11:58 CMS Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-3-S L1544053-04 Air N Maroon 10/06/22 13:52 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/11/22 00:09 10/11/22 00:09 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 12:04 10/11/22 12:04 CMS Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-3-D L1544053-05 Air N Maroon 10/06/22 14:32 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/11/22 00:53 10/11/22 00:53 DAH Mt. Juliet, TN Volatile Organic Compounds (MS) by Method TO-15 WG1940790 10 10/11/22 14:03 10/11/22 14:03 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 12:12 10/11/22 12:12 CMS Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-4 L1544053-06 Air N Maroon 10/06/22 15:30 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Volatile Organic Compounds (MS) by Method TO-15 WG1940199 1 10/11/22 01:38 10/11/22 01:38 DAH Mt. Juliet, TN Organic Compounds (GC) by Method D1946 WG1940595 1 10/11/22 12:16 10/11/22 12:16 CMS 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]
Jennifer A McCurdy
Project Manager
Volatile Organic Compounds (MS) by Method TO-15
The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).

Batch Lab Sample ID Analytes
WG1940199 L1544053-01 Ethanol
WG1940199 L1544053-02 Acetone
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 (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 L1544053-01 Acetone 67-64-1 58.10 1.25 2.97 41.4 98.4 1 WG1940199 SVP-1 L1544053-01 Benzene 71-43-2 78.10 0.200 0.639 0.327 1.04 1 WG1940199 SVP-1 L1544053-01 Carbon disulfide 75-15-0 76.10 0.200 0.622 2.73 8.50 1 WG1940199 SVP-1 L1544053-01 Cyclohexane 110-82-7 84.20 0.200 0.689 1.34 4.61 1 WG1940199 SVP-1 L1544053-01 Ethanol 64-17-5 46.10 1.25 2.36 122 230 E 1 WG1940199 SVP-1 L1544053-01 Ethylbenzene 100-41-4 106 0.200 0.867 0.367 1.59 1 WG1940199 SVP-1 L1544053-01 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.312 1.53 1 WG1940199 SVP-1 L1544053-01 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.289 1.62 1 WG1940199 SVP-1 L1544053-01 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.291 1.44 1 WG1940199 SVP-1 L1544053-01 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 0.384 2.94 1 WG1940199 SVP-1 L1544053-01 Heptane 142-82-5 100 0.200 0.818 0.892 3.65 1 WG1940199 SVP-1 L1544053-01 n-Hexane 110-54-3 86.20 0.630 2.22 0.942 3.32 1 WG1940199 SVP-1 L1544053-01 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 9.40 27.7 1 WG1940199 SVP-1 L1544053-01 2-Propanol 67-63-0 60.10 1.25 3.07 4.85 11.9 1 WG1940199 SVP-1 L1544053-01 Propene 115-07-1 42.10 1.25 2.15 2.49 4.29 1 WG1940199 SVP-1 L1544053-01 Tetrachloroethylene 127-18-4 166 0.200 1.36 0.425 2.89 1 WG1940199 SVP-1 L1544053-01 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.437 2.38 1 WG1940199 SVP-1 L1544053-01 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.693 3.40 1 WG1940199 SVP-1 L1544053-01 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 0.428 2.00 1 WG1940199 SVP-1 L1544053-01 m&p-Xylene 1330-20-7 106 0.400 1.73 1.53 6.63 1 WG1940199 SVP-1 L1544053-01 o-Xylene 95-47-6 106 0.200 0.867 0.462 2.00 1 WG1940199 SVP-2-S L1544053-02 Acetone 67-64-1 58.10 1.25 2.97 177 421 E 1 WG1940199 SVP-2-S L1544053-02 Benzene 71-43-2 78.10 0.200 0.639 0.707 2.26 1 WG1940199 SVP-2-S L1544053-02 Carbon disulfide 75-15-0 76.10 0.200 0.622 4.92 15.3 1 WG1940199 SVP-2-S L1544053-02 Cyclohexane 110-82-7 84.20 0.200 0.689 0.763 2.63 1 WG1940199 SVP-2-S L1544053-02 Ethanol 64-17-5 46.10 1.25 2.36 99.6 188 1 WG1940199 SVP-2-S L1544053-02 Ethylbenzene 100-41-4 106 0.200 0.867 0.406 1.76 1 WG1940199 SVP-2-S L1544053-02 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.618 3.03 1 WG1940199 SVP-2-S L1544053-02 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.469 2.32 1 WG1940199 SVP-2-S L1544053-02 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 9.03 69.2 1 WG1940199 SVP-2-S L1544053-02 Heptane 142-82-5 100 0.200 0.818 1.50 6.13 1 WG1940199 SVP-2-S L1544053-02 n-Hexane 110-54-3 86.20 0.630 2.22 2.11 7.44 1 WG1940199 SVP-2-S L1544053-02 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 2.45 10.0 1 WG1940199 SVP-2-S L1544053-02 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 23.6 69.6 1 WG1940199 SVP-2-S L1544053-02 2-Propanol 67-63-0 60.10 1.25 3.07 4.24 10.4 1 WG1940199 SVP-2-S L1544053-02 Propene 115-07-1 42.10 1.25 2.15 4.64 7.99 1 WG1940199 SVP-2-S L1544053-02 Toluene 108-88-3 92.10 0.500 1.88 3.97 15.0 1 WG1940199 SVP-2-S L1544053-02 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.794 4.32 1 WG1940199 SVP-2-S L1544053-02 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.725 3.56 1 WG1940199 SVP-2-S L1544053-02 m&p-Xylene 1330-20-7 106 0.400 1.73 1.56 6.76 1 WG1940199 SVP-2-S L1544053-02 o-Xylene 95-47-6 106 0.200 0.867 0.587 2.54 1 WG1940199 SVP-2-D L1544053-03 Acetone 67-64-1 58.10 1.25 2.97 29.5 70.1 1 WG1940199 SVP-2-D L1544053-03 Benzene 71-43-2 78.10 0.200 0.639 0.972 3.10 1 WG1940199 SVP-2-D L1544053-03 Carbon disulfide 75-15-0 76.10 0.200 0.622 7.86 24.5 1 WG1940199 SVP-2-D L1544053-03 Chloromethane 74-87-3 50.50 0.200 0.413 0.320 0.661 1 WG1940199 SVP-2-D L1544053-03 Cyclohexane 110-82-7 84.20 0.200 0.689 0.684 2.36 1 WG1940199 SVP-2-D L1544053-03 Ethanol 64-17-5 46.10 1.25 2.36 44.9 84.7 1 WG1940199 SVP-2-D L1544053-03 Ethylbenzene 100-41-4 106 0.200 0.867 0.860 3.73 1 WG1940199 SVP-2-D L1544053-03 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.591 2.90 1 WG1940199 SVP-2-D L1544053-03 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.320 1.80 1 WG1940199 SVP-2-D L1544053-03 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 8.32 63.8 1 WG1940199 SVP-2-D L1544053-03 Heptane 142-82-5 100 0.200 0.818 1.53 6.26 1 WG1940199 SVP-2-D L1544053-03 n-Hexane 110-54-3 86.20 0.630 2.22 2.16 7.62 1 WG1940199 SVP-2-D L1544053-03 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 3.61 10.6 1 WG1940199 SVP-2-D L1544053-03 2-Propanol 67-63-0 60.10 1.25 3.07 10.6 26.1 1 WG1940199 SVP-2-D L1544053-03 Propene 115-07-1 42.10 1.25 2.15 5.17 8.90 1 WG1940199 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-015 L1544053 10/12/22 15:04 5 of 28

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-2-D L1544053-03 Toluene 108-88-3 92.10 0.500 1.88 13.1 49.3 1 WG1940199 SVP-2-D L1544053-03 1,1,1-Trichloroethane 71-55-6 133 0.200 1.09 0.921 5.01 1 WG1940199 SVP-2-D L1544053-03 Trichloroethylene 79-01-6 131 0.200 1.07 0.382 2.05 1 WG1940199 SVP-2-D L1544053-03 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.749 3.68 1 WG1940199 SVP-2-D L1544053-03 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.207 1.02 1 WG1940199 SVP-2-D L1544053-03 m&p-Xylene 1330-20-7 106 0.400 1.73 1.87 8.11 1 WG1940199 SVP-2-D L1544053-03 o-Xylene 95-47-6 106 0.200 0.867 0.598 2.59 1 WG1940199 SVP-2-D L1544053-03 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 1230 5080 1 WG1940199 SVP-3-S L1544053-04 Acetone 67-64-1 58.10 1.25 2.97 15.1 35.9 1 WG1940199 SVP-3-S L1544053-04 Benzene 71-43-2 78.10 0.200 0.639 0.589 1.88 1 WG1940199 SVP-3-S L1544053-04 Carbon disulfide 75-15-0 76.10 0.200 0.622 0.807 2.51 1 WG1940199 SVP-3-S L1544053-04 Chloromethane 74-87-3 50.50 0.200 0.413 0.487 1.01 1 WG1940199 SVP-3-S L1544053-04 Ethanol 64-17-5 46.10 1.25 2.36 15.8 29.8 1 WG1940199 SVP-3-S L1544053-04 Ethylbenzene 100-41-4 106 0.200 0.867 0.206 0.893 1 WG1940199 SVP-3-S L1544053-04 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.248 1.39 1 WG1940199 SVP-3-S L1544053-04 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.394 1.95 1 WG1940199 SVP-3-S L1544053-04 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 0.770 5.90 1 WG1940199 SVP-3-S L1544053-04 Heptane 142-82-5 100 0.200 0.818 0.458 1.87 1 WG1940199 SVP-3-S L1544053-04 n-Hexane 110-54-3 86.20 0.630 2.22 0.969 3.42 1 WG1940199 SVP-3-S L1544053-04 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 1.54 4.54 1 WG1940199 SVP-3-S L1544053-04 2-Propanol 67-63-0 60.10 1.25 3.07 1.57 3.86 1 WG1940199 SVP-3-S L1544053-04 Toluene 108-88-3 92.10 0.500 1.88 0.700 2.64 1 WG1940199 SVP-3-S L1544053-04 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.962 4.72 1 WG1940199 SVP-3-S L1544053-04 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.239 1.17 1 WG1940199 SVP-3-S L1544053-04 m&p-Xylene 1330-20-7 106 0.400 1.73 0.455 1.97 1 WG1940199 SVP-3-S L1544053-04 o-Xylene 95-47-6 106 0.200 0.867 0.321 1.39 1 WG1940199 SVP-3-D L1544053-05 Acetone 67-64-1 58.10 1.25 2.97 46.7 111 1 WG1940199 SVP-3-D L1544053-05 Benzene 71-43-2 78.10 0.200 0.639 11.6 37.1 1 WG1940199 SVP-3-D L1544053-05 Carbon disulfide 75-15-0 76.10 0.200 0.622 33.0 103 1 WG1940199 SVP-3-D L1544053-05 Cyclohexane 110-82-7 84.20 0.200 0.689 43.0 148 1 WG1940199 SVP-3-D L1544053-05 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 1.12 6.73 1 WG1940199 SVP-3-D L1544053-05 Ethanol 64-17-5 46.10 1.25 2.36 22.8 43.0 1 WG1940199 SVP-3-D L1544053-05 Ethylbenzene 100-41-4 106 0.200 0.867 0.395 1.71 1 WG1940199 SVP-3-D L1544053-05 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.296 1.45 1 WG1940199 SVP-3-D L1544053-05 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 5.15 39.5 1 WG1940199 SVP-3-D L1544053-05 Heptane 142-82-5 100 0.200 0.818 44.2 181 1 WG1940199 SVP-3-D L1544053-05 n-Hexane 110-54-3 86.20 6.30 22.2 185 652 10 WG1940790 SVP-3-D L1544053-05 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 9.27 27.3 1 WG1940199 SVP-3-D L1544053-05 2-Propanol 67-63-0 60.10 1.25 3.07 6.09 15.0 1 WG1940199 SVP-3-D L1544053-05 Propene 115-07-1 42.10 12.5 21.5 539 928 10 WG1940790 SVP-3-D L1544053-05 Toluene 108-88-3 92.10 0.500 1.88 5.37 20.2 1 WG1940199 SVP-3-D L1544053-05 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.404 1.98 1 WG1940199 SVP-3-D L1544053-05 m&p-Xylene 1330-20-7 106 0.400 1.73 1.43 6.20 1 WG1940199 SVP-3-D L1544053-05 o-Xylene 95-47-6 106 0.200 0.867 0.473 2.05 1 WG1940199 SVP-3-D L1544053-05 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 1160 4790 1 WG1940199 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-015 L1544053 10/12/22 15:04 6 of 28

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 L1544053-06 Acetone 67-64-1 58.10 1.25 2.97 19.8 47.1 1 WG1940199 SVP-4 L1544053-06 Benzene 71-43-2 78.10 0.200 0.639 1.11 3.55 1 WG1940199 SVP-4 L1544053-06 Carbon disulfide 75-15-0 76.10 0.200 0.622 8.59 26.7 1 WG1940199 SVP-4 L1544053-06 Chloromethane 74-87-3 50.50 0.200 0.413 0.201 0.415 1 WG1940199 SVP-4 L1544053-06 Cyclohexane 110-82-7 84.20 0.200 0.689 0.543 1.87 1 WG1940199 SVP-4 L1544053-06 Ethanol 64-17-5 46.10 1.25 2.36 26.6 50.2 1 WG1940199 SVP-4 L1544053-06 Ethylbenzene 100-41-4 106 0.200 0.867 0.406 1.76 1 WG1940199 SVP-4 L1544053-06 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.278 1.56 1 WG1940199 SVP-4 L1544053-06 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.317 1.57 1 WG1940199 SVP-4 L1544053-06 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 2.50 19.2 1 WG1940199 SVP-4 L1544053-06 Heptane 142-82-5 100 0.200 0.818 2.06 8.43 1 WG1940199 SVP-4 L1544053-06 n-Hexane 110-54-3 86.20 0.630 2.22 3.91 13.8 1 WG1940199 SVP-4 L1544053-06 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 3.63 10.7 1 WG1940199 SVP-4 L1544053-06 2-Propanol 67-63-0 60.10 1.25 3.07 7.83 19.2 1 WG1940199 SVP-4 L1544053-06 Styrene 100-42-5 104 0.200 0.851 0.202 0.859 1 WG1940199 SVP-4 L1544053-06 Toluene 108-88-3 92.10 0.500 1.88 4.36 16.4 1 WG1940199 SVP-4 L1544053-06 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.521 2.56 1 WG1940199 SVP-4 L1544053-06 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 0.209 0.976 1 WG1940199 SVP-4 L1544053-06 m&p-Xylene 1330-20-7 106 0.400 1.73 1.65 7.15 1 WG1940199 SVP-4 L1544053-06 o-Xylene 95-47-6 106 0.200 0.867 0.479 2.08 1 WG1940199 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Client ID Lab Sample ID Analyte % %
SVP-1 L1544053-01 Oxygen 7782-44-7 32 5.00 19.3 1 WG1940595 SVP-1 L1544053-01 Carbon Dioxide 124-38-9 44.01 0.500 1.98 1 WG1940595 SVP-2-S L1544053-02 Oxygen 7782-44-7 32 5.00 20.2 1 WG1940595 SVP-2-S L1544053-02 Carbon Dioxide 124-38-9 44.01 0.500 1.05 1 WG1940595 SVP-2-D L1544053-03 Oxygen 7782-44-7 32 5.00 20.9 1 WG1940595 SVP-3-S L1544053-04 Oxygen 7782-44-7 32 5.00 20.8 1 WG1940595 SVP-3-D L1544053-05 Oxygen 7782-44-7 32 5.00 20.1 1 WG1940595 SVP-4 L1544053-06 Oxygen 7782-44-7 32 5.00 19.9 1 WG1940595 SVP-4 L1544053-06 Carbon Dioxide 124-38-9 44.01 0.500 1.21 1 WG1940595 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-015 L1544053 10/12/22 15:04 7 of 28 SAMPLE RESULTS - 01
L1544053
SVP-1
Collected date/time: 10/06/22 10:00
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 41.4 98.4 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 0.327 1.04 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 2.73 8.50 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 ND ND 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 1.34 4.61 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 122 230 E 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.367 1.59 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.312 1.53 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.289 1.62 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.291 1.44 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 0.384 2.94 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 0.892 3.65 1 WG1940199 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 0.630 2.22 0.942 3.32 1 WG1940199 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 9.40 27.7 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 4.85 11.9 1 WG1940199 Propene 115-07-1 42.10 1.25 2.15 2.49 4.29 1 WG1940199
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1940199
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 0.425 2.89 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 ND ND 1 WG1940199
1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 8 of 28 SAMPLE RESULTS - 01
L1544053
SVP-1
Collected date/time: 10/06/22 10:00
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 0.437 2.38 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.693 3.40 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 0.428 2.00 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 1.53 6.63 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.462 2.00 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 94.0 WG1940199 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 19.3 1 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 1.98 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 9 of 28 SAMPLE RESULTS - 02
L1544053
SVP-2-S
Collected date/time: 10/06/22 11:32
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 2.97 177 421 E 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 0.707 2.26 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 4.92 15.3 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 ND ND 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 0.763 2.63 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 99.6 188 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.406 1.76 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.618 3.03 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 ND ND 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.469 2.32 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 9.03 69.2 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 1.50 6.13 1 WG1940199
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 0.630 2.22 2.11 7.44 1 WG1940199 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 2.45 10.0 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 23.6 69.6 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 4.24 10.4 1 WG1940199 Propene 115-07-1 42.10 1.25 2.15 4.64 7.99 1 WG1940199
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1940199
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 3.97 15.0 1 WG1940199 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 10 of 28 SAMPLE RESULTS - 02
L1544053
SVP-2-S
Collected date/time: 10/06/22 11:32
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 0.794 4.32 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.725 3.56 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 1.56 6.76 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.587 2.54 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 94.5 WG1940199 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 20.2 1 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 1.05 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 11 of 28 SAMPLE RESULTS - 03
L1544053
SVP-2-D
Collected date/time: 10/06/22 12:17
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 29.5 70.1 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 0.972 3.10 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 7.86 24.5 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 0.320 0.661 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 0.684 2.36 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 44.9 84.7 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.860 3.73 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.591 2.90 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.320 1.80 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 ND ND 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 8.32 63.8 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 1.53 6.26 1 WG1940199
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 0.630 2.22 2.16 7.62 1 WG1940199 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 3.61 10.6 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 10.6 26.1 1 WG1940199 Propene 115-07-1 42.10 1.25 2.15 5.17 8.90 1 WG1940199
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1940199
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 13.1 49.3 1 WG1940199 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 12 of 28 SAMPLE RESULTS - 03
L1544053
SVP-2-D
Collected date/time: 10/06/22 12:17
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 0.921 5.01 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 0.382 2.05 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.749 3.68 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.207 1.02 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 1.87 8.11 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.598 2.59 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 1230 5080 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 96.0 WG1940199 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 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 ND 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 13 of 28 SAMPLE RESULTS - 04
L1544053
SVP-3-S
Collected date/time: 10/06/22 13:52
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 15.1 35.9 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 0.589 1.88 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 0.807 2.51 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 0.487 1.01 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 ND ND 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 15.8 29.8 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.206 0.893 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 ND ND 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.248 1.39 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.394 1.95 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 0.770 5.90 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 0.458 1.87 1 WG1940199 Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 0.630 2.22 0.969 3.42 1 WG1940199 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 1.54 4.54 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 1.57 3.86 1 WG1940199 Propene 115-07-1 42.10 1.25 2.15 ND ND 1 WG1940199
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1940199
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 0.700 2.64 1 WG1940199 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 14 of 28 SAMPLE RESULTS - 04
L1544053
SVP-3-S
Collected date/time: 10/06/22 13:52
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 ND ND 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.962 4.72 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 0.239 1.17 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 0.455 1.97 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.321 1.39 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 95.7 WG1940199 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 20.8 1 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 ND 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 15 of 28 SAMPLE RESULTS - 05
L1544053
SVP-3-D
Collected date/time: 10/06/22 14:32
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 46.7 111 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 11.6 37.1 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 33.0 103 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 ND ND 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 43.0 148 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 1.12 6.73 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 22.8 43.0 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.395 1.71 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 0.296 1.45 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 ND ND 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 ND ND 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 5.15 39.5 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 44.2 181 1 WG1940199
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 6.30 22.2 185 652 10 WG1940790
Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 9.27 27.3 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 6.09 15.0 1 WG1940199 Propene 115-07-1 42.10 12.5 21.5 539 928 10 WG1940790
Styrene 100-42-5 104 0.200 0.851 ND ND 1 WG1940199
1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 5.37 20.2 1 WG1940199 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 16 of 28 SAMPLE RESULTS - 05
L1544053
SVP-3-D
Collected date/time: 10/06/22 14:32
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 ND ND 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.404 1.98 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 ND ND 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 1.43 6.20 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.473 2.05 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 1160 4790 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 95.8 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 97.7 WG1940790 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 20.1 1 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 ND 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 17 of 28 SAMPLE RESULTS - 06
L1544053
SVP-4
Collected date/time: 10/06/22 15:30
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 19.8 47.1 1 WG1940199
Allyl chloride 107-05-1 76.53 0.200 0.626 ND ND 1 WG1940199 Benzene 71-43-2 78.10 0.200 0.639 1.11 3.55 1 WG1940199 Benzyl Chloride 100-44-7 127 0.200 1.04 ND ND 1 WG1940199 Bromodichloromethane 75-27-4 164 0.200 1.34 ND ND 1 WG1940199 Bromoform 75-25-2 253 0.600 6.21 ND ND 1 WG1940199
Bromomethane 74-83-9 94.90 0.200 0.776 ND ND 1 WG1940199 1,3-Butadiene 106-99-0 54.10 2.00 4.43 ND ND 1 WG1940199 Carbon disulfide 75-15-0 76.10 0.200 0.622 8.59 26.7 1 WG1940199 Carbon tetrachloride 56-23-5 154 0.200 1.26 ND ND 1 WG1940199 Chlorobenzene 108-90-7 113 0.200 0.924 ND ND 1 WG1940199 Chloroethane 75-00-3 64.50 0.200 0.528 ND ND 1 WG1940199 Chloroform 67-66-3 119 0.200 0.973 ND ND 1 WG1940199
Chloromethane 74-87-3 50.50 0.200 0.413 0.201 0.415 1 WG1940199 2-Chlorotoluene 95-49-8 126 0.200 1.03 ND ND 1 WG1940199 Cyclohexane 110-82-7 84.20 0.200 0.689 0.543 1.87 1 WG1940199 Dibromochloromethane 124-48-1 208 0.200 1.70 ND ND 1 WG1940199 1,2-Dibromoethane 106-93-4 188 0.200 1.54 ND ND 1 WG1940199 1,2-Dichlorobenzene 95-50-1 147 0.200 1.20 ND ND 1 WG1940199 1,3-Dichlorobenzene 541-73-1 147 0.200 1.20 ND ND 1 WG1940199 1,4-Dichlorobenzene 106-46-7 147 0.200 1.20 ND ND 1 WG1940199 1,2-Dichloroethane 107-06-2 99 0.200 0.810 ND ND 1 WG1940199 1,1-Dichloroethane 75-34-3 98 0.200 0.802 ND ND 1 WG1940199 1,1-Dichloroethene 75-35-4 96.90 0.200 0.793 ND ND 1 WG1940199 cis-1,2-Dichloroethene 156-59-2 96.90 0.200 0.793 ND ND 1 WG1940199 trans-1,2-Dichloroethene 156-60-5 96.90 0.200 0.793 ND ND 1 WG1940199 1,2-Dichloropropane 78-87-5 113 0.200 0.924 ND ND 1 WG1940199 cis-1,3-Dichloropropene 10061-01-5 111 0.200 0.908 ND ND 1 WG1940199 trans-1,3-Dichloropropene 10061-02-6 111 0.200 0.908 ND ND 1 WG1940199 1,4-Dioxane 123-91-1 88.10 0.200 0.721 ND ND 1 WG1940199 Ethanol 64-17-5 46.10 1.25 2.36 26.6 50.2 1 WG1940199
Ethylbenzene 100-41-4 106 0.200 0.867 0.406 1.76 1 WG1940199 4-Ethyltoluene 622-96-8 120 0.200 0.982 ND ND 1 WG1940199 Trichlorofluoromethane 75-69-4 137.40 0.200 1.12 0.278 1.56 1 WG1940199 Dichlorodifluoromethane 75-71-8 120.92 0.200 0.989 0.317 1.57 1 WG1940199 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.200 1.53 2.50 19.2 1 WG1940199 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.200 1.40 ND ND 1 WG1940199 Heptane 142-82-5 100 0.200 0.818 2.06 8.43 1 WG1940199
Hexachloro-1,3-butadiene 87-68-3 261 0.630 6.73 ND ND 1 WG1940199 n-Hexane 110-54-3 86.20 0.630 2.22 3.91 13.8 1 WG1940199 Isopropylbenzene 98-82-8 120.20 0.200 0.983 ND ND 1 WG1940199 Methylene Chloride 75-09-2 84.90 0.200 0.694 ND ND 1 WG1940199 Methyl Butyl Ketone 591-78-6 100 1.25 5.11 ND ND 1 WG1940199 2-Butanone (MEK) 78-93-3 72.10 1.25 3.69 3.63 10.7 1 WG1940199 4-Methyl-2-pentanone (MIBK) 108-10-1 100.10 1.25 5.12 ND ND 1 WG1940199 Methyl methacrylate 80-62-6 100.12 0.200 0.819 ND ND 1 WG1940199 MTBE 1634-04-4 88.10 0.200 0.721 ND ND 1 WG1940199
Naphthalene 91-20-3 128 0.630 3.30 ND ND 1 WG1940199
2-Propanol 67-63-0 60.10 1.25 3.07 7.83 19.2 1 WG1940199 Propene 115-07-1 42.10 1.25 2.15 ND ND 1 WG1940199
Styrene 100-42-5 104 0.200 0.851 0.202 0.859 1 WG1940199 1,1,2,2-Tetrachloroethane 79-34-5 168 0.200 1.37 ND ND 1 WG1940199 Tetrachloroethylene 127-18-4 166 0.200 1.36 ND ND 1 WG1940199 Tetrahydrofuran 109-99-9 72.10 0.200 0.590 ND ND 1 WG1940199 Toluene 108-88-3 92.10 0.500 1.88 4.36 16.4 1 WG1940199 1,2,4-Trichlorobenzene 120-82-1 181 0.630 4.66 ND ND 1 WG1940199 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-015 L1544053 10/12/22 15:04 18 of 28 SAMPLE RESULTS - 06
L1544053
SVP-4
Collected date/time: 10/06/22 15:30
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 ND ND 1 WG1940199 1,1,2-Trichloroethane 79-00-5 133 0.200 1.09 ND ND 1 WG1940199 Trichloroethylene 79-01-6 131 0.200 1.07 ND ND 1 WG1940199 1,2,4-Trimethylbenzene 95-63-6 120 0.200 0.982 0.521 2.56 1 WG1940199 1,3,5-Trimethylbenzene 108-67-8 120 0.200 0.982 ND ND 1 WG1940199 2,2,4-Trimethylpentane 540-84-1 114.22 0.200 0.934 0.209 0.976 1 WG1940199 Vinyl chloride 75-01-4 62.50 0.200 0.511 ND ND 1 WG1940199 Vinyl Bromide 593-60-2 106.95 0.200 0.875 ND ND 1 WG1940199 Vinyl acetate 108-05-4 86.10 0.200 0.704 ND ND 1 WG1940199 m&p-Xylene 1330-20-7 106 0.400 1.73 1.65 7.15 1 WG1940199 o-Xylene 95-47-6 106 0.200 0.867 0.479 2.08 1 WG1940199 TPH (GC/MS) Low Fraction 8006-61-9 101 200 826 ND ND 1 WG1940199 (S) 1,4-Bromofluorobenzene 460-00-4 175 60.0-140 94.9 WG1940199 Organic Compounds (GC) by Method D1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Oxygen 7782-44-7 32 5.00 19.9 1 WG1940595
Carbon Monoxide 630-08-0 28 2.00 ND 1 WG1940595
Carbon Dioxide 124-38-9 44.01 0.500 1.21 1 WG1940595
Methane 74-82-8 16 0.400 ND 1 WG1940595
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-015 L1544053 10/12/22 15:04 19 of 28 WG1940199 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1544053-01,02,03,04,05,06 Method Blank (MB)
(MB) R3846977-3 10/10/22 10:34
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
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1544053 10/12/22 15:04 20 of 28 WG1940199 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1544053-01,02,03,04,05,06 Method Blank (MB)
(MB) R3846977-3 10/10/22 10:34
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 0.182 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 92.3 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3846977-1 10/10/22 09:08 • (LCSD) R3846977-2 10/10/22 09:51 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 3.67 3.63 97.9 96.8 70.0-130 1.10 25
Allyl Chloride 3.75 3.61 3.50 96.3 93.3 70.0-130 3.09 25 Benzene 3.75 3.99 3.95 106 105 70.0-130 1.01 25
Benzyl Chloride 3.75 3.90 3.84 104 102 70.0-152 1.55 25 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-015 L1544053 10/12/22 15:04 21 of 28 WG1940199 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1544053-01,02,03,04,05,06 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3846977-1 10/10/22 09:08 • (LCSD) R3846977-2 10/10/22 09:51 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 4.00 3.93 107 105 70.0-130 1.77 25 Bromoform 3.75 4.23 4.18 113 111 70.0-130 1.19 25
Bromomethane 3.75 4.05 4.00 108 107 70.0-130 1.24 25
1,3-Butadiene 3.75 3.39 3.42 90.4 91.2 70.0-130 0.881 25 Carbon disulfide 3.75 4.05 4.04 108 108 70.0-130 0.247 25 Carbon tetrachloride 3.75 4.15 4.11 111 110 70.0-130 0.969 25 Chlorobenzene 3.75 4.11 4.13 110 110 70.0-130 0.485 25
Chloroethane 3.75 3.68 3.56 98.1 94.9 70.0-130 3.31 25
Chloroform 3.75 4.02 3.99 107 106 70.0-130 0.749 25
Chloromethane 3.75 3.58 3.57 95.5 95.2 70.0-130 0.280 25 2-Chlorotoluene 3.75 4.15 4.18 111 111 70.0-130 0.720 25 Cyclohexane 3.75 4.01 3.95 107 105 70.0-130 1.51 25
Dibromochloromethane 3.75 4.06 4.07 108 109 70.0-130 0.246 25 1,2-Dibromoethane 3.75 4.08 4.08 109 109 70.0-130 0.000 25 1,2-Dichlorobenzene 3.75 4.14 4.20 110 112 70.0-130 1.44 25 1,3-Dichlorobenzene 3.75 4.14 4.15 110 111 70.0-130 0.241 25 1,4-Dichlorobenzene 3.75 3.95 3.94 105 105 70.0-130 0.253 25 1,2-Dichloroethane 3.75 4.01 3.95 107 105 70.0-130 1.51 25 1,1-Dichloroethane 3.75 3.91 3.92 104 105 70.0-130 0.255 25 1,1-Dichloroethene 3.75 3.94 3.99 105 106 70.0-130 1.26 25 cis-1,2-Dichloroethene 3.75 3.90 3.81 104 102 70.0-130 2.33 25 trans-1,2-Dichloroethene 3.75 3.90 3.90 104 104 70.0-130 0.000 25 1,2-Dichloropropane 3.75 3.77 3.75 101 100 70.0-130 0.532 25 cis-1,3-Dichloropropene 3.75 4.00 3.97 107 106 70.0-130 0.753 25 trans-1,3-Dichloropropene 3.75 4.08 4.02 109 107 70.0-130 1.48 25 1,4-Dioxane 3.75 4.15 4.10 111 109 70.0-140 1.21 25
Ethanol 3.75 3.62 3.40 96.5 90.7 55.0-148 6.27 25
Ethylbenzene 3.75 4.15 4.13 111 110 70.0-130 0.483 25
4-Ethyltoluene 3.75 4.22 4.23 113 113 70.0-130 0.237 25 Trichlorofluoromethane 3.75 4.20 4.16 112 111 70.0-130 0.957 25 Dichlorodifluoromethane 3.75 3.04 3.00 81.1 80.0 64.0-139 1.32 25 1,1,2-Trichlorotrifluoroethane 3.75 4.18 4.20 111 112 70.0-130 0.477 25 1,2-Dichlorotetrafluoroethane 3.75 3.95 3.99 105 106 70.0-130 1.01 25 Heptane 3.75 3.28 3.31 87.5 88.3 70.0-130 0.910 25
Hexachloro-1,3-butadiene 3.75 4.79 4.74 128 126 70.0-151 1.05 25 n-Hexane 3.75 3.86 3.77 103 101 70.0-130 2.36 25
Isopropylbenzene 3.75 4.19 4.12 112 110 70.0-130 1.68 25 Methylene Chloride 3.75 3.63 3.60 96.8 96.0 70.0-130 0.830 25 Methyl Butyl Ketone 3.75 3.47 3.35 92.5 89.3 70.0-149 3.52 25 Methyl Ethyl Ketone 3.75 4.10 3.84 109 102 70.0-130 6.55 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-015 L1544053 10/12/22 15:04 22 of 28 WG1940199 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1544053-01,02,03,04,05,06 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3846977-1 10/10/22 09:08 • (LCSD) R3846977-2 10/10/22 09:51 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 3.53 3.53 94.1 94.1 70.0-139 0.000 25 Methyl Methacrylate 3.75 3.82 3.78 102 101 70.0-130 1.05 25 MTBE 3.75 4.11 4.03 110 107 70.0-130 1.97 25
Naphthalene 3.75 4.21 4.16 112 111 70.0-159 1.19 25
2-Propanol 3.75 3.64 3.65 97.1 97.3 70.0-139 0.274 25
Propene 3.75 3.68 3.70 98.1 98.7 64.0-144 0.542 25
Styrene 3.75 4.02 3.99 107 106 70.0-130 0.749 25
1,1,2,2-Tetrachloroethane 3.75 4.19 4.13 112 110 70.0-130 1.44 25 Tetrachloroethylene 3.75 4.36 4.31 116 115 70.0-130 1.15 25 Tetrahydrofuran 3.75 3.45 3.53 92.0 94.1 70.0-137 2.29 25 Toluene 3.75 4.04 3.98 108 106 70.0-130 1.50 25
1,2,4-Trichlorobenzene 3.75 4.33 4.35 115 116 70.0-160 0.461 25 1,1,1-Trichloroethane 3.75 4.09 4.07 109 109 70.0-130 0.490 25 1,1,2-Trichloroethane 3.75 3.95 3.87 105 103 70.0-130 2.05 25 Trichloroethylene 3.75 4.07 3.97 109 106 70.0-130 2.49 25 1,2,4-Trimethylbenzene 3.75 4.29 4.30 114 115 70.0-130 0.233 25 1,3,5-Trimethylbenzene 3.75 4.28 4.30 114 115 70.0-130 0.466 25 2,2,4-Trimethylpentane 3.75 3.87 3.81 103 102 70.0-130 1.56 25 Vinyl chloride 3.75 3.98 3.81 106 102 70.0-130 4.36 25
Vinyl Bromide 3.75 4.16 4.09 111 109 70.0-130 1.70 25
Vinyl acetate 3.75 3.55 3.58 94.7 95.5 70.0-130 0.842 25 m&p-Xylene 7.50 8.38 8.37 112 112 70.0-130 0.119 25
o-Xylene 3.75 4.16 4.11 111 110 70.0-130 1.21 25
TPH (GC/MS) Low Fraction 203 226 224 111 110 70.0-130 0.889 25 (S) 1,4-Bromofluorobenzene 95.0 95.5 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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RMD Environmental - Walnut Creek, CA 01-PRO-015 L1544053 10/12/22 15:04 23 of 28 WG1940790 QUALITY CONTROL SUMMARY
Volatile Organic Compounds (MS) by Method TO-15 L1544053-05 Method Blank (MB)
(MB) R3847346-3 10/11/22 09:39
MB Result MB Qualifier MB MDL MB RDL
Analyte ppbv ppbv ppbv
n-Hexane U 0.206 0.630
Propene U 0.0932 1.25
(S) 1,4-Bromofluorobenzene 97.6 60.0-140
Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS) R3847346-1 10/11/22 08:35 • (LCSD) R3847346-2 10/11/22 09:08 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ppbv ppbv ppbv % % % % %
n-Hexane 3.75 4.27 4.18 114 111 70.0-130 2.13 25
Propene 3.75 4.25 4.25 113 113 64.0-144 0.000 25
(S) 1,4-Bromofluorobenzene 100 100 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-015 L1544053 10/12/22 15:04 24 of 28 WG1940595 QUALITY CONTROL SUMMARY
Organic Compounds (GC) by Method D1946 L1544053-01,02,03,04,05,06 Method Blank (MB)
(MB) R3847039-3 10/11/22 09:53
MB Result MB Qualifier MB MDL MB RDL
Analyte % % %
Oxygen 1.07 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) R3847039-1 10/11/22 09:45 • (LCSD) R3847039-2 10/11/22 09:50 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Oxygen 20.0 20.9 20.9 105 105 70.0-130 0.000 20
Carbon Monoxide 2.50 2.54 2.57 102 103 70.0-130 1.17 20 Carbon Dioxide 2.50 2.60 2.65 104 106 70.0-130 1.90 20
Methane 2.00 2.05 2.08 103 104 70.0-130 1.45 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
E
The analyte concentration exceeds the upper limit of the calibration range of the instrument established by the initial calibration (ICAL).

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-015 L1544053 10/12/22 15:04 26 of 28 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
October 14, 2022
RMD Environmental - Walnut Creek, CA
Sample Delivery Group: L1546314
Samples Received: 10/07/2022
Project Number: 01-PRO-015
Description: 675-685 Middlefield
Report To: Doug Whichard
1371 Oakland Blvd.

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

October 14, 2022
[Preliminary Report]
Jennifer A McCurdy
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-015 L1546314 10/14/22 15:34 1 of 16 October 17, 2022
Jason Romer
Project Manager
ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

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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
SVP-1 L1546314-01 6
SVP-2-S L1546314-02 7
SVP-2-D L1546314-03 8
SVP-3-S L1546314-04 9
SVP-3-D L1546314-05 10
SVP-4 L1546314-06 11
Qc: Quality Control Summary 12
Organic Compounds (GC) by Method ASTM 1946 12
Gl: Glossary of Terms 13
Al: Accreditations & Locations 14
Sc: Sample Chain of Custody 15
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-1 L1546314-01 Air N Maroon 10/06/22 10:00 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:09 10/14/22 14:09 JAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-2-S L1546314-02 Air N Maroon 10/06/22 11:32 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:12 10/14/22 14:12 JAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-2-D L1546314-03 Air N Maroon 10/06/22 12:17 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:15 10/14/22 14:15 JAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-3-S L1546314-04 Air N Maroon 10/06/22 11:52 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:19 10/14/22 14:19 JAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-3-D L1546314-05 Air N Maroon 10/06/22 14:32 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:23 10/14/22 14:23 JAP Mt. Juliet, TN Collected by Collected date/time Received date/time
SVP-4 L1546314-06 Air N Maroon 10/06/22 15:30 10/07/22 09:00 Method Batch Dilution Preparation Analysis Analyst Location date/time date/time
Organic Compounds (GC) by Method ASTM 1946 WG1942924 1 10/14/22 14:26 10/14/22 14:26 JAP 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]
Jennifer A McCurdy
Project Manager
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-015 L1546314 10/14/22 15:34 4 of 16 Jason Romer
Project Manager
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DETECTION SUMMARY
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Client ID Lab Sample ID Analyte % %
SVP-3-S L1546314-04 Helium 7440-59-7 0.100 3.80 1 WG1942924 1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-1
Collected date/time: 10/06/22 10:00
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1942924
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-2-S
Collected date/time: 10/06/22 11:32
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1942924
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-2-D
Collected date/time: 10/06/22 12:17
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1942924
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-3-S
Collected date/time: 10/06/22 11:52
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 3.80 1 WG1942924
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-3-D
Collected date/time: 10/06/22 14:32
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1942924
1 Cp
2 Tc
3 Ss
4 Cn
5 Ds
6 Sr
7 Qc
8 Gl
9 Al
10 Sc
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L1546314
SVP-4
Collected date/time: 10/06/22 15:30
Organic Compounds (GC) by Method ASTM 1946
CAS # Mol. Wt. RDL Result Qualifier Dilution Batch
Analyte % %
Helium 7440-59-7 0.100 ND 1 WG1942924
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-015 L1546314 10/17/22 11:43 11 of 16 WG1942924 QUALITY CONTROL SUMMARY
Organic Compounds (GC) by Method ASTM 1946 L1546314-01,02,03,04,05,06 Method Blank (MB)
(MB) R3848607-3 10/14/22 14:03
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) R3848607-1 10/14/22 13:57 • (LCSD) R3848607-2 10/14/22 14:01 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec. Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte % % % % % % % %
Helium 2.50 2.15 2.20 86.0 88.0 70.0-130 2.30 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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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.

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
The remainder of this page intentionally left blank, there are no qualifiers applied to this SDG. 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-015 L1546314 10/17/22 11:43 13 of 16 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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Date: March 2, 2023
Project No.: 118-150-2
Prepared For: Mr. Nick Towstopiat
DAVID J. POWERS & ASSOCIATES
1871 The Alameda, Suite 200
San Jose, California 95126
Re: Environmental Document Review
675-685 East Middlefield Road
Mountain View, California
Dear Mr. Towstopiat:

Per your request, Cornerstone Earth Group, Inc. (Cornerstone) is pleased to present this letter summarizing our review of the provided environmental reports for 675-685 East Middlefield Road in Mountain View, California, California (Site). This letter was prepared for David J. Powers & Associates (Powers) in accordance with our January 30, 2023 agreement (Agreement).

Project Background
We understand that Powers is providing California Environmental Quality Act (CEQA) support associated with the planned redevelopment of the Site. The approximately 10.6-acre site (APN 160-60-013) is located within the East Whisman Precise Plan area and currently is developed with two commercial office buildings. The project proposes to demolish the existing structures and construct a mixed-use development consisting of two market-rate residential buildings with associated below ground parking, a below market-rate residential building, an office building, a multi-level aboveground parking garage, a privately-owned publicly accessible park, a paseo, various courtyards, and a new private drive connecting Ferguson Drive and East Middlefield Road to provide direct access to the new parking garage.

Documents Reviewed
This letter briefly summarizes selected information obtained from the following reports:
 RMD Environmental Solutions. October 28, 2022a. Phase I Environmental Site Assessment, 675 & 685 E. Middlefield Road, Mountain View, California.  RMD Environmental Solutions. December 2, 2022b. Phase II Site Investigation Report (Draft), 675-685 E. Middlefield Road, Mountain View, California.

For complete details, please refer directly to the original reports.

Site History
Based on the information reviewed, the Site historically was used for agricultural purposes (row crops). By the mid-1950s, two small buildings were located on the southern portion of the Site.

RMD (2022a) stated that by the 1960s, multiple commercial buildings were located on-Site. 118-150-2
675-685 East Middlefield Road
Mountain View, California