CC 06-03-2025 Searchable Packet.pdf — Cupertino City Council, June 3, 2025 (part 3 of 5)

SIGNED:
________
Liang Chao, Mayor
City of Cupertino
________________________
Date
ATTEST:
________
Kirsten Squarcia, City Clerk
________________________
Date
404
CC 06-03-2025
404 of 1012
Attachment B
Exhibit A
405
CC 06-03-2025
405 of 1012

CITY OF CUPERTINO
Agenda Item
25-14012 Agenda Date: 6/3/2025
Agenda #: 9.

Subject: Consider the potential purchase of and appoint a negotiator for 10480 Finch Avenue, owned by the Cupertino Unified School District, adjacent to Sedgwick Elementary School Appoint the Interim City Attorney and Acting City Manager to negotiate with the Superintendent of the Cupertino Unified School District or her designee regarding the possible purchase of 10480 Finch Avenue, Cupertino, CA 95014, Assessor’s Parcel Number 375-40-067, from Cupertino Unified School District on terms established by the City Council
CITY OF CUPERTINO Page 1 of 1 Printed on 5/29/2025
powered by Legistar™406
CC 06-03-2025
406 of 1012

CITY COUNCIL STAFF REPORT
Meeting: June 3, 2025
Subject
Consider the potential purchase of and appoint a negotiator for 10480 Finch Avenue, owned by the Cupertino Unified School District, adjacent to Sedgwick Elementary School
Recommended Action
Appoint the Interim City Attorney and Acting City Manager to negotiate with the Superintendent of the Cupertino Unified School District or her designee regarding the possible purchase of 10480 Finch Avenue, Cupertino, CA 95014, Assessor’s Parcel Number 375-40-067, from Cupertino Unified School District on terms established by the City Council.

Background
10480 Finch Avenue (“Finch Property”) is an approximate 1.5-acre vacant parcel currently owned by the Cupertino Unified School District (“CUSD”). Adjacent to Sedgwick Elementary School, it is located in the southeastern portion of the City in the Rancho Rinconada district, bounded by Stevens Creek Blvd. to the north, Miller Avenue to the west, Bollinger Road to the south and Lawrence Expressway to the east.

In 2016, the CUSD Board authorized the purchase of the Finch Property for $5,386,750 in order to expand Sedgwick Elementary School. Due to the property’s prior use for agricultural purposes and the potential presence of pesticides, CUSD retained an environmental consultant to complete a Geologic and Environmental Hazards Report.

Testing by the consultant revealed pesticide residue, lead, and hydrocarbon deposits from an underground fuel tank. Under the oversight of the Department of Toxic Substances (“DTSC”), a Preliminary Environmental Assessment and a Supplemental Site Investigation were completed in September and November 2015. Although CUSD has confirmed providing all documentation in their possession, they did not provide a copy of a closure letter from DTSC. Further investigation into the environmental condition of the site is advisable and an updated Phase 1 Environmental Report should be obtained during negotiations.
407
CC 06-03-2025
407 of 1012
Pertinent Environmental documents from CUSD are as follows:
i. Attachment A: Preliminary Environmental Assessment (September 2015) ii. Attachment B: Supplemental Site Investigation (November 2015) iii. Attachment C: School Cleanup Agreement with DTSC (June 2017) iv. Attachment D: Removal Action Workplan (January 2018) v. Attachment E: Hazardous Materials Management Report (June2018) Parkland Dedication in lieu Fee fund
Pursuant to Municipal Code section 13.08 and Government Code section 66477, permissible uses of the Parkland Dedication in lieu Funds (“Parkland Funds”) include acquisition of parkland or developing new parks and recreational facilities.

Currently, the City’s Parkland Fund has a balance of approximately $19.1 million (as shown on 118 of the FY23-24 ACFR), of which $5.9 M is allocated toward LawrenceMitty Park design and construction, leaving approximately $13.2 million currently not allocated. If the City Council intends to convert this parcel into a public park space, the available Parkland funds could be used towards the purchase and development of the property.

Next Steps
Should Council direct staff to proceed with exploring a purchase of the Finch Property, the following due diligence information will need to be prepared prior to a discussion in Closed Session:
i. Obtain an updated Title Report;
ii. Perform any required environmental analysis;
iii. Obtain a property appraisal.

The above are estimated to cost approximately $10,000 and to take approximately 6 to 10 weeks to complete.

Sustainability Impact
No sustainability impact.

Fiscal Impact
Appointment of negotiators will result in the use of staff time and expenses for time used by Aleshire & Wynder, LLP. Approximately $10,000 will be used from the City Manager’s contingency fund (100-14-123 719-705) to procure the necessary documentation to inform the purchasing discussions.

City Work Program Item/Description
408
CC 06-03-2025
408 of 1012
None
Council Goals
Quality of Life
California Environmental Quality Act
Not applicable at this time.
_____________________________________
Prepared by: Chad Mosley, Director of Public Works
Reviewed by: Floy Andrews, City Attorney
Approved for Submission by: Tina Kapoor, Acting City Manager Attachments:

A - Preliminary Environmental Assessment (September 2015) B - Supplemental Site Investigation (November 2015)
C - School Cleanup Agreement with DTSC (June 2017)
D - Removal Action Workplan (January 2018)
E - Hazardous Materials Management Report (June 2018)
409
CC 06-03-2025
409 of 1012

PRELIMINARY ENVIRONMENTAL ASSESSMENT

SEDGWICK ELEMENTARY SCHOOL

EXPANSION PROJECT
10480 FINCH AVENUE

CUPERTINO, SANTA CLARA COUNTY, CALIFORNIA
Prepared for:

CUPERTINO UNION SCHOOL DISTRICT
September 2015
Attachment A
410
CC 06-03-2025
410 of 1012
411
CC 06-03-2025
411 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
- i -

TABLE OF CONTENTS
Page
EXECUTIVE SUMMARY ............................................................................................ ES1

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

1.1 PURPOSE ........................................................................................... 1-1

1.2 OBJECTIVES ...................................................................................... 1-1

2.0 PROPERTY DESCRIPTION AND CONTACTS............................................... 2-1

2.1 SITE ADDRESS / ASSESSOR’S PARCEL NUMBER.......................... 2-1

2.2 DESIGNATED CONTACT PERSON AND MAILING ADDRESS.......... 2-1

2.3 PROPERTY USE................................................................................. 2-1

2.4 ENVIROSTOR DATABASE NUMBER ................................................. 2-1

2.5 TOWNSHIP, RANGE, AND SECTION................................................. 2-1

2.6 SITE MAPS.......................................................................................... 2-1

2.7 PHYSICAL SETTING........................................................................... 2-1

2.8 SURROUNDING PROPERTY LAND USE........................................... 2-2

3.0 BACKGROUND............................................................................................... 3-1

3.1 PREVIOUS ENVIRONMENTAL REPORTS......................................... 3-1

3.2 CHEMICALS OF POTENTIAL CONCERN........................................... 3-2

4.0 CONCEPTUAL SITE MODEL ......................................................................... 4-1

5.0 PEA ASSESSMENT........................................................................................ 5-1

5.1 SAMPLE LOCATIONS......................................................................... 5-1

5.1.1 Soil Sampling .......................................................................... 5-1

5.1.2 Soil Gas Sampling ................................................................... 5-3

5.1.3 Quality Assurance / Quality Control Samples ........................... 5-3

5.2 SAMPLE COLLECTION....................................................................... 5-3

5.2.1 Soil Sample Collection.............................................................. 5-3

5.2.2 Soil Gas Sample Collection ...................................................... 5-4

5.2.3 Decontamination Procedures ................................................... 5-5

5.3 SAMPLE ANALYSES .......................................................................... 5-5

5.3.1 Chain-of-Custody Records ....................................................... 5-6

5.4 FIELD VARIANCES............................................................................. 5-6

6.0 FINDINGS....................................................................................................... 6-1

6.1 SOIL SAMPLING RESULTS................................................................ 6-1

6.1.1 OCPs ...................................................................................... 6-1

6.1.2 Lead ........................................................................................ 6-1 412
CC 06-03-2025
412 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
- ii -

TABLE OF CONTENTS (CONTINUED)
Page

6.1.3 Arsenic .................................................................................... 6-2

6.1.4 PCBs ....................................................................................... 6-2

6.1.5 TPHg and BTEX ...................................................................... 6-2

6.2 SOIL GAS SAMPLING RESULTS ....................................................... 6-2

6.2.1 VOCs ...................................................................................... 6-2

6.3 QA/QC SAMPLES ............................................................................... 6-3

6.3.1 Duplicates ................................................................................ 6-3

6.3.2 Equipment Blank ...................................................................... 6-4

6.3.3 Field Blank ............................................................................... 6-4

6.3.4 Laboratory QA/QC.................................................................... 6-4

7.0 HUMAN HEALTH SCREENING EVALUATION............................................... 7-1

7.1 CHEMICALS OF POTENTIAL CONCERN........................................... 7-1

7.2 SOIL RISK ASSESSMENT.................................................................. 7-1

7.3 SOIL GAS RISK ASSESSMENT.......................................................... 7-2

8.0 ECOLOGICAL SCREENING........................................................................... 8-1

9.0 CONCLUSIONS AND RECOMMENDATIONS................................................ 9-1

10.0 REFERENCES................................................................................................ 10-1 TABLES
5-1 Field Sampling Schedule (Soil)........................................................................ 5-7 5-2 Field Sampling Schedule (Soil Gas) ................................................................ 5-9 5-3 Sample Collection Information......................................................................... 5-10 6-1 Soil Results for OCPs...................................................................................... 6-6 6-2 Soil Results for Arsenic and Lead.................................................................... 6-8 6-3 Soil Results for PCBs ...................................................................................... 6-11 6-4 Soil Results for TPHg and BTEX ..................................................................... 6-12 6-5 Soil Gas Results for VOCs .............................................................................. 6-13 7-1 Soil Exposure Screening Evaluation................................................................ 7-4 7-2 Soil Gas Exposure Screening Evaluation ........................................................ 7-5 413
CC 06-03-2025
413 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
- iii -

TABLE OF CONTENTS (CONTINUED)
Page
PLATES
Site Location ............................................................................................................... Plate 1-1 Site Plan ..................................................................................................................... Plate 1-2 Conceptual Site Model................................................................................................ Plate 4-1 Site Sampling Plan ........................................................................................................... Plate 5-1 Soil Vapor/Drill Hole Locations ......................................................................................... Plate 5-2 Soil Vapor Probe and Sample Schematic ........................................................................ Plate 5-3 Chlordane Results ..................................................................................................... Plate 6-1 Lead Results............................................................................................................... Plate 6-2 Arsenic Results........................................................................................................... Plate 6-3

APPENDICES
APPENDIX A: DTSC CORRESPONDENCE
APPENDIX B: QUALITY ASSURANCE PROJECT PLAN (QAPP)
APPENDIX C: DRILL HOLE LOGS
APPENDIX D: ANALYTICAL LABORATORY REPORTS AND CHAIN-OF-CUSTODYS APPENDIX E: RISK SPREADSHEETS
414
CC 06-03-2025
414 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL ES-1

EXECUTIVE SUMMARY
Padre Associates, Inc. (Padre), on behalf of the Cupertino Union School District (District), has prepared this Preliminary Environmental Assessment (PEA) report for the Sedgwick Elementary School Expansion Project located at 10480 Finch Avenue in Cupertino, Santa Clara County, California (Project Site).

The Project Site consists of 1.48 acres of residential use property, and is located adjacent to the northwest corner of the Sedgwick Elementary School property. According to Padre’s review of available historical aerial photographs, the Project Site was planted as an orchard from at least 1939 through the late 1950s. The existing residential building is present in a 1956 aerial photograph.

The Project Site is bordered to the north by Phil Lane, beyond which is residential property; to the east and south by Sedgwick Elementary School; to the west by residential property; and to the northwest by Finch Avenue, beyond which is residential property.

The PEA was conducted in accordance with the Padre document titled Preliminary Environmental Assessment Work Plan, Sedgwick Elementary School Expansion Project, 10480 Finch Avenue, Cupertino, Santa Clara County, California, dated May 2015. The PEA Work Plan was conditionally approved by the California Environmental Protection Agency (CalEPA) Department of Toxic Substances Control (DTSC) in a letter to District dated June 4, 2015. This PEA Report will be made available to the public for review and comment pursuant to Option A of the California Education Code (CEC) §17213.1.a (6)(A).

The purpose of the PEA was to establish whether a release or potential release of hazardous substances, which pose a threat to human health via ingestion, dermal contact, and inhalation exposure pathways, exists at the Project Site. Chemicals of potential concern (COPCs) identified at the Project Site included:
• Organochlorine pesticides (OCPs) and arsenic in soil from historic agricultural use; • Lead in soil from weathering of lead-based paint used on historic on-site building structures; and termiticides in soil from historic on-site building structures with wood components;
• Polychlorinated biphenyls (PCBs) in soil from the weathering of window caulking used in historic building structures; and
• Petroleum hydrocarbons and volatile organic compounds (VOCs) in soil and soil gas from a former 500-gallon gasoline underground storage tank (UST).

The results of the PEA screening level risk assessment estimated the total risk from COPCs identified in soils at the Project Site to be 3.2 x 10-5, which provides an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The total health hazard from COPCs identified in soils at the Project Site is estimated to be 0.46, which does not provide an increased health 415
CC 06-03-2025
415 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL ES-2
hazard (i.e., >1). Therefore, a response action to reduce and/or eliminate the COPCs identified in surficial soils at the Project Site is recommended.

Lead concentrations ranged from 9.0 to 310 milligrams (mg/kg) in soil samples collected throughout the Project Site. Using DTSC’s lead risk assessment spreadsheet model (LeadSpread Version 8), exposure to the lead concentrations identified at the Project Site would result in a 90th percentile blood lead concentration of 8.0 micrograms per deciliter (µg/dl) in children, which exceeds the Office of Environmental Health Hazard Assessment (OEHHA) blood toxicity level of 1 µg/dl. Therefore, a response action to reduce or eliminate leadimpacted soil is recommended.

Arsenic concentrations ranged from 5.2 to 15 mg/kg in soil samples collected from across the Project Site. The arsenic data set consisted of four soil samples collected as part of the PEA, and 16 soil samples previously collected as part of a preliminary soil evaluation completed by others (Cornerstone, 2014). The four PEA soil samples were collected as stepout and step-down samples at the location of soil sample SS-6, which reported the highest Project Site arsenic concentration at 15 mg/kg. Arsenic concentrations reported for the PEA soil samples ranged from 5.7 to 13 mg/kg, indicating that arsenic concentrations in soil at this location do not present a potential “hotspot” for arsenic in soil. A statistical evaluation was performed by calculating the 95% Upper Confidence Limit (UCL) for the arsenic data set. The 95% UCL for arsenic in soil at the Project Site was calculated to be 10 mg/kg. A graphical evaluation completed by creating a normal probability plot of the arsenic data set. The shape of the plotted data presents a relatively normal distribution. Therefore, arsenic concentrations identified in surface soil at the Project Site are representative of ambient concentrations and further assessment and/or remedial action for arsenic in soil is not warranted.

Results of the soil gas assessment conducted at the Project Site identified low level concentrations of VOCs; however, none of the of the VOCs exceeded their respective human health screening levels. The results of the PEA screening level risk assessment for soil gas estimated the total risk to be 8.6 x 10-9, which does not provide an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The cumulative hazard was estimated to be 0.0003, which does not provide a significant health hazard (>1). Therefore, further assessment and/or remediation regarding VOCs identified in soil gas at the Project Site is not warranted.

Due to elevated concentrations of OCPs and lead identified in surface soil around existing structures at the Project Site, Padre recommends a response action to reduce or eliminate the potential impact of these contaminants. The recommended remedial action is excavation, removal, and offsite disposal at an appropriate landfill. Prior to the response action, Padre recommends conducting a Supplemental Site Investigation (SSI) to further define chlordane and lead impacts around the structures.
416
CC 06-03-2025
416 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
1-1

1.0 INTRODUCTION
This document presents the results of the Preliminary Environmental Assessment (PEA), which was completed by Padre Associates, Inc. (Padre) on behalf of the Cupertino Union School District (District), for the Sedgwick Elementary School Expansion Project located at 10480 Finch Avenue, Cupertino, Santa Clara County, California (Project Site). The Project Site is identified on Plate 1-1: Site Location and Plate 1-2: Site Plan.

The Project Site consists of 1.48 acres of residential property located adjacent to the northwest corner of the existing Sedgewick Elementary School. The expansion project will not result in an addition of classrooms or students to the existing elementary school. Public water and sewer will be provided to the Project Site by the San Jose Water Company and the Sunnyvale Sanitation District, respectively.

1.1 PURPOSE
California Department of Education statutes (Assembly Bill 387, Senate Bill 162 and Assembly Bill 2644) require the CalEPA/DTSC to review environmental assessments for proposed new school sites and/or new construction school expansion projects. The role of the DTSC is to ensure that selected properties do not contain hazardous substances that are a threat to public health and the environment.

1.2 OBJECTIVES
This PEA was conducted consistent with the DTSC guidance manual for evaluation of hazardous substance release sites titled Preliminary Endangerment Assessment Guidance Manual, State of California, Environmental Protection Agency, January 1994 (Interim Final – Revised October 2013). Pursuant to the Health and Safety Code §25355.5 (a) (1) (C), the activities performed were to fulfill the requirements of the Environmental Oversight Agreement (EOA) issued to the school district by CalEPA/DTSC.

The objectives of the PEA included:
• Evaluating historical information for indications of past use, storage, disposal, and/or release of hazardous substances at the Project Site;
• Establishing through a field sampling and laboratory analysis program, the nature, 417
CC 06-03-2025
417 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
1-2
concentration, and general extent of hazardous substances that may be present in soil and/or groundwater at the Project Site; and
• Estimating the potential threat to public health and the environment presented by hazardous constituents identified at the property, and providing an indicator of relative risk using a residential land-use scenario.

Based on information developed during the course of the PEA and the conservative human and ecological risk evaluation using the DTSC’s PEA Guidance Manual (January 1994 (Interim Final – Revised October 2013), DTSC will then make an informed decision regarding potential risks posed by the Project Site.

Possible outcomes of the PEA decision include the issuance of a “No Further Action” finding if the risk level is found to be less than 1 in 1,000,000 (>10-6) which is DTSC’s “point of departure”, and the health hazard index is less than 1.0. Additional outcomes may include the need for further assessment through the Remedial Investigation/ Feasibility Study (RI/FS) process if the Project Site presents a risk and/or health hazard; the need to perform a Removal Action if localized impacts by hazardous substances release(s) are found; or the abandonment of the Project Site as a potential school site and the pursuit of alternative sites. 418
CC 06-03-2025
418 of 1012
419
CC 06-03-2025
419 of 1012
420
CC 06-03-2025
420 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
2-1

2.0 PROPERTY DESCRIPTION AND CONTACTS

2.1 SITE ADDRESS / ASSESSOR’S PARCEL NUMBER
The Project Site consists of approximately 1.48 acres of residential property located at 10480 Finch Avenue in Cupertino, Santa Clara County, California. The County of Santa Clara identifies the Project Site as Assessor’s Parcel Number (APN): 375-40-067. A copy of the APN map was presented in the PEA Work Plan.

2.2 DESIGNATED CONTACT PERSON AND MAILING ADDRESS
Mary Ann Duggan, P.E., Director – Facility Modernization Cupertino Union School District
10301 Vista Drive,
Cupertino, CA 94014
Phone No. (408) 252-3000
[email protected]

2.3 PROPERTY USE
The Project Site consists of 1.48-acres of residential use property, and is located adjacent to the northwest corner of the Sedgwick Elementary School property. According to a review of available historical aerial photographs, the Project Site was planted as an orchard from at least 1939 through the late 1950s. The existing residential building is present in a 1956 aerial photograph.

2.4 ENVIROSTOR DATABASE NUMBER
The EnviroStor database number for the Project Site is 60002143.

2.5 TOWNSHIP, RANGE, AND SECTION
The Project Site is located in Section 19, Township 7 South, Range 1 West, of the Cupertino Quadrangle, California USGS 7½-Minute Series, Topographic Map (1991).

Approximate latitude and longitude of the central area of the property are identified to be:
• Latitude (North) 37° 18’ 56.5194” (37.3157)
• Longitude (West) -122° 0’ 35.2794” (-122.0098)

2.6 SITE MAPS
A Site Location Map is included as Plate 1-1, and a Site Plan is included as Plate 1-2.

2.7 PHYSICAL SETTING
Based on a review of the USGS 7.5-minute series topographic map Cupertino Quadrangle, California, 1991 (photorevised 1982), the Project Site lies at an approximate 421
CC 06-03-2025
421 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
2-2
elevation of 205 feet above mean sea level (msl) near the center of the Project Site. The overall topographic gradient for the surrounding area is to the northeast. The Project Site is relatively flat with storm water runoff directed northerly towards storm drains located in the adjacent street.

Calabazas Creek is located approximately 1,600-feet northwest of the Project Site and flows in a northeasterly direction. Saratoga Creek is located approximately 0.75 miles west of the Project Site and flows in a northerly direction.

The Project Site is located within the Coast Ranges Geomorphic Province of California.

The Coast Ranges stretch approximately 600 miles from the Oregon border to the Santa Ynez River and fall into two sub-provinces: the ranges north of San Francisco Bay and those from the bay south to Santa Barbara County. The northern ranges lie east of the San Andreas Fault zone, whereas most of the southern ranges are to the west. The province contains many elongate ranges and narrow valleys that are approximately parallel to the coast, although the coast usually shows a somewhat more northerly trend than do the ridges and valleys.

Therefore, some valleys intersect the shore at acute angles and some mountains terminate abruptly at the sea. The northern Coast Ranges are higher than the southern where Solomon Peak located in Trinity County rises to an elevation of 7,581 feet, the highest point in the Coast Ranges (Norris and Webb, 1990).

According to the United States Department of Agriculture, National Resources Conservation Service, Web Soil Survey (http://websoilsurvey.nrcs.usda.gov/app/), two soil types are identified for the Project Site. Soils located within the southeast half of the Project Site consist of Urban Land-Stevens Creek Complex located on 0 to 2 percent slopes. Native soils consist of sandy loam, silt loam, and silty clay loam. Soils in the northwest half of the Project Site consist of Urban Land-Elpaloalto Complex located on 0 to 2 percent slopes. Native soils consist of clay loam and silty clay loam. Both of these soils are well drained and runoff is slow.

A review of the State Water Resources Control Board’s GeoTracker website (http://geotracker.waterboards.ca.gov), identified groundwater assessment activities that were conducted for a facility located approximately 0.56 miles northeast of the Project Site. Reportedly, the depth to first groundwater at the referenced site is greater than 80 feet bgs, and groundwater is inferred to flow in a northeast direction.

2.8 SURROUNDING PROPERTY LAND USE
The Project Site is bordered to the north by Phil Lane, beyond which is residential property; to the east and south by Sedgwick Elementary School; to the west by residential property; and to the northwest by Finch Avenue, beyond which is residential property. 422
CC 06-03-2025
422 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
3-1

3.0 BACKGROUND

3.1 PREVIOUS ENVIRONMENTAL REPORTS
Padre reviewed the document titled Phase I Environmental Site Assessment and Preliminary Soil Quality Evaluation, 10480 Finch Avenue, Cupertino, California and dated July 1, 2014. A copy of the Phase I ESA has previously been provided to DTSC. The Phase I ESA was prepared by Cornerstone Earth Group (Cornerstone) on behalf of David J. Powers & Associates and, a copy was provided to DTSC. Below is a summary of the findings presented in the Phase I ESA:

The property is currently owned by F.A. Pestarino Jr. Trustee, and has been owned by the Pestarino family since the 1930s. The property historically contained a prune tree orchard.

In addition to the residence, the Project Site contains a workshop (wood-framed with corrugate metal roof) located at the southeast corner of the Project Site. Located south and adjacent to the workshop are two, small, single-room dwellings that are wood-framed and situated on concrete blocks.

In 1996 a 500-gallon gasoline UST was removed from the Project Site. Reportedly, the UST had been empty for approximately 20 years prior to removal. Two soil samples were collected below the ends of the UST at depths of approximately 7-feet below grade surface (bgs). Total petroleum hydrocarbons identified as gasoline (TPHg) were identified in soil at concentrations up to 60 milligrams per kilogram (mg/kg). The Santa Clara Valley Water District (SCVWD) subsequently issued a case-closure letter for the UST dated March 26, 1997 stating that “Due to the low levels of hydrocarbons detected and the site location, Santa Clara Valley Water District staff believes that with time the residual pollution will naturally attenuate and does not require any further corrective action at this time.” Because recognized environmental conditions (RECs) were identified as part of the Phase I ESA, Cornerstone conducted preliminary soil assessment activities at the Project Site.

Based on the historic agricultural use (orchard) at the Project Site and the age/construction of the existing structures, a total of sixteen surface soil samples were collected throughout the Project Site and chemically analyzed for the presence of pesticides, arsenic, lead, and mercury.

Five of the soil samples were collected at the perimeter of the residence, and two soil samples were collected at the perimeter of the workshop. Below is summary of the analytical results:
• Chlordane was reported at a concentration of 2.8 mg/kg at the location of soil sample SS-5, which exceeds the U.S. EPA Region 9 Residential Screening Level (RSL, EPA June 2015) of 1.7 mg/kg. Soil sample SS-5 is located along the western side of the residence;
423
CC 06-03-2025
423 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
3-2
• Arsenic was reported at concentrations ranging from 5.2 mg/kg to 15 mg/kg. The highest arsenic concentration was identified at the location of soil sample SS-6 located along the northwest property boundary; and
• Lead was reported at concentrations ranging from 9.0 mg/kg to 100 mg/kg, which exceeds the California Human Health Screening Level (CHHSL) of 80 mg/kg.

The highest lead concentration was identified at the location of soil sample SS-2 located along the western side of the workshop.

The soil assessment activities included the advancement of one drill hole using directpush drilling technology to an approximate depth of 20 feet at the location of the former UST.

Soil samples were collected from approximate depths of 8 feet and 12 feet, which were chemically analyzed for the presence of TPHg, benzene, toluene, ethylbenzene, total xylenes (BTEX) and methyl-tert butyl ether (MTBE). Reportedly, TPHg, BTEX, or MTBE concentrations were not identified in the soil sample collected from a depth of 8 feet below ground surface (bgs). However, TPHg, ethylbenzene, and total xylenes were identified at concentrations of 1,300 mg/kg, 27 mg/kg, and 180 mg/kg, respectively in the 12-foot soil sample.

3.2 CHEMICALS OF POTENTIAL CONCERN
The chemicals of potential concern (COPCs) identified at the Project Site was based on the results of a previous environmental investigation and historic property use. This information is summarized below:
• The Project Site had been used for agricultural purposes (orchard) from at least 1939 through the late 1950s. Based on preliminary soil data, further assessment for OCPs associated with historic agricultural use was not warranted. However, arsenic concentrations ranged from 5.2 to 15 mg/kg across the Project Site. Therefore, at the location of soil sample SS-6 (which contained the highest concentration of arsenic), the collection of step-out soil samples was performed;
• Based on preliminary soil data, chlordane was identified at a concentration of

2.8 mg/kg at the location of soil sample SS-5, which is located on the west side of the residence (constructed circa 1950s). Therefore, step-out soil sampling for OCPs was performed at the location of SS-5 and around the perimeter of the residence and outbuildings (workshop, single-room dwelling);
• Based on preliminary soil data, lead was identified at a concentration of 100 mg/kg at the location of soil sample SS-2, which is located on the west side of the workshop. Therefore, step-out soil sampling for lead at the location of SS-2 and around the perimeter of the residence and outbuildings was performed;
• In recent years, U.S. EPA has disovered that caulk containing PCBs was used in many buildings from the 1950s through the 1970s. The residential 424
CC 06-03-2025
424 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
3-3
structure at the Project Site was constructed in the 1950s. Therefore, soil sampling for the presence of PCBs beneath large window panes at the residence was performed;
• No electrical transformers, either pad-mounted and/or pole-mounted, were identified on the Project Site. Therefore, the collection of soil samples to assess for the presence of PCBs related to electrical transformers was not performed;
• Based on the presence of a former gasoline UST and identified petroleum hydrocarbon contamination, soil vapor sampling for TPHg and VOCs was performed;
• According to the California Division of Mines and Geology, Geologic Map of San Francisco – San Jose Quadrangle California, (1:250,000), 1990 (Second Printing 2005) ultramafic outcrops are mapped approximately 7.5 miles east/south east of the Project Site, and approximately 7.5 miles south of the Project Site. Based on a review of U.S.G.S. topographic maps for the Project Site and surrounding areas (San Jose, Santa Clara), the main drainage from the ultramafic outcrops appear to be Coyote Creek, Alamitos Creek, and Los Gatos Creek which drain along the east side of the Santa Clara Valley. The Project Site is situated along the west side of the Santa Clara Valley within the drainage of Calabazas Creek. Therefore, the potential presence of naturally occurring asbestos (NOA) at the Project Site from weathering and deposition of ultramafic rock outcrops is considered low and soil sampling for NOA was not performed;
425
CC 06-03-2025
425 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
4-1

4.0 CONCEPTUAL SITE MODEL
The conceptual site model is the tool used to identify the primary sources of COPCs identified at the Project Site, release mechanisms for the COPCs, points of exposure at the Project Site, and the exposure pathways (ingestion, inhalation, and dermal contact) for the screening level evaluation of chronic health risks. The objective of this PEA is to evaluate the Project Site for an unrestricted land use (residential) scenario.

There are several ways a receptor may be exposed to COPCs, ie. pesticides, metals.

Receptors can include humans, animals, vegetation, surface water, and/or groundwater.

Typical pathways for exposure to COPCs include:
• Physical transport via tracking chemicals of concern on people, clothing, and/or equipment; and
• Transport by airborne particulate matter.

For humans and animals, exposure usually occurs by the following exposure routes:
• Ingestion or inhalation of contaminated soil particles; • Dermal contact with contaminated soil particles.

The conceptual site model for the Project Site was developed based on the following assumptions:
• Exposure of students, staff, and site visitors to COPCs in soil via the ingestion, dermal contact, and inhalation routes is considered a complete exposure pathway;
• Exposure of students, staff, and site visitors to COPCs in airborne particulate matter via the inhalation route is considered a complete exposure pathway; • Exposure of students, staff, and site visitors to COPCs in soil vapor via the inhalation route is considered a complete exposure pathway; • The Project Site will be connected to municipal water. Therefore, exposure to groundwater beneath the Project Site is considered an incomplete exposure pathway;
• Surface water was not observed at the Project Site. Therefore, exposure to surface water at the Project Site is an incomplete exposure pathway; and • Ingestion of vegetation and animals is considered an incomplete exposure pathway because of the proposed use as an elementary school site.

A conceptual site model is presented on Plate 4-1.
426
CC 06-03-2025
426 of 1012
427
CC 06-03-2025
427 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-1

5.0 PEA ASSESSMENT
On July 9th and 10th, 2015 Padre completed the PEA soil and soil gas sampling activities at the Project Site in general accordance with the DTSC approved Final PEA Work Plan dated May 2015. At the time of the PEA sample collection activities, there were no unusual Project Site conditions.

The District provided notification to residents in the “immediate area” of the Project Site prior to the commencement of PEA field activities. The “immediate area” is defined as in line of sight of the Project Site. The notices were submitted on District letterhead and delivered via United States Postal Service a minimum of 5 days prior field activities. A copy of the draft notification letter was presented in the PEA Work Plan.

5.1 SAMPLE LOCATIONS
Soil samples collected around the perimeters of the buildings were located in the field using pin flags. The field sampling schedule is presented in Tables 5-1 and 5-2, and the sample collection information is presented in Table 5-3. Additionally, the sample collection locations are presented on Plates 5-1 and 5-2. Specific sample locations are described below.

5.1.1 Soil Sampling
The soil sample collection activities were implemented in general accordance with the guidelines of the following documents:
• California DTSC, PEA Guidance Manual, January 1994 (Interim Final – Revised October 2013);
• DTSC’s Interim Guidance, Evaluation of School Sites with Potential Soil Contamination as a Result of Lead from Lead-Based Paint, Organochlorine Pesticides from Termiticides, and Polychlorinated Biphenyls from Electrical Transformers, Revised June 9, 2006; and
• DTSC’s Interim Guidance for Sampling Agricultural Properties, Revised August 7, 2008.

Residence Structure. Additional soil samples were collected to further delineate the potential presence of pesticides in soil around the perimeter of the building structure and lead from weathering of lead-based paint. Soil samples were also collected beneath large window panes to identify the potential presence of PCBs from the weathering of caulking. • At the location of SS-5 soil samples were collected at approximate depths of 1.0 to 1.5 feet and 2.0 to 2.5 feet. The 1.0 to 1.5-foot soil sample was chemically analyzed for the presence of OCPs, and the 2.0 to 2.5-foot sample was placed on-hold with the analytical laboratory;
428
CC 06-03-2025
428 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-2
• Around the perimeter of the residence, soil samples were collected from approximate depths of surface to 0.5 feet, 1.0 to 1.5 feet, and 2.0 to 2.5 feet bgs.

The surface and 1.0 to 1.5-foot samples were chemically analyzed for the presence of OCPs and lead, and the 2.0 to 2.5-foot soil samples were placed onhold with the analytical laboratory; and • Surface soil samples collected beneath window panes (P-4, -9, -10, -11, -14, and -15) were chemically analyzed for the potential presence of PCBs with the deeper soil samples placed on-hold.

Outbuildings. Soil samples were collected to further delineate the presence of lead and to potentially identify residual termiticides in soil along the east and south side of the outbuildings.
• At the location of SS-2, a soil sample was collected at an approximate depth of

1.0 to 1.5 feet and chemically analyzed for the presence of lead; • Along the west side of the outbuildings, step-out soil samples (5- and 10-foot centers) were collected at approximate depths of surface to 0.5 feet and 1.0 to

1.5 feet and chemically analyzed for the presence of lead. Soil sample P-22 was placed on-hold with the analytical laboratory pending the results of sample P-20; and
• Along the eastern and southern sides of the outbuildings, soil samples were collected at approximate depths of surface to 0.5 feet and 1.0 to 1.5 feet and chemically analyzed for OCPs and lead.

Arsenic soil samples. At the location of soil sample SS-6, discrete soil samples were collected from approximate depths of 1.0 to 1.5 feet and 2.0 to 2.5 feet to be chemically analyzed for the presence of arsenic. The 2.0 to 2.5-foot sample was placed on-hold with the analytical laboratory pending results of the 1.0 to 1.5-foot soil sample. Additionally, three stepout soil samples (AS-1, -2, and -3) were collected from approximate depths of surface to 0.5 feet, 1.0 to 1.5 feet, and 2.0 to 2.5 feet to be chemically analyzed for the presence of arsenic.

The deeper soil samples were placed on hold with the analytical laboratory pending results of the surface soil samples.

Former Gasoline UST. In the area of the former 500-gallon gasoline UST, five drill holes (DH-1 through DH-5) were advanced to approximate depths of 20 feet. Drill hole DH-1 was advanced to confirm and vertically define identified contamination at the location of drill hole EB1 (June 2014). Drill holes DH-2 through DH-5 were advanced to laterally define potential impacts. Soil samples were visually inspected and field screened using a hand-held photoionization detector (PID). Based on field screening and in consultation with the DTSC project manager, 2 to 3 soil samples per drill hole (12-, 15-, and 20-feet) were collected and chemically analyzed for the presence of TPHg, BTEX and MTBE. 429
CC 06-03-2025
429 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-3

5.1.2 Soil Gas Sampling
The soil gas sample collection activities were implemented in general accordance with the guidelines of the following documents:
• California DTSC, PEA Guidance Manual, January 1994 (Interim Final – Revised October 2013); and
• CALEPA, DTSC, Advisory, Active Soil Gas Investigations, April 2012.

The soil gas investigation was directed at an identified area of contamination (EB-1).

Although soil gas samples were collected at the location of drill hole DH-1, there were no indications (visual, field screening) of contamination which was also observed by the DTSC project manager. Additionally, no indications of contamination at the locations of DH-2 through DH-5 were observed. Therefore, in consultation with the DTSC project manager, no additional soil gas samples were collected.

Soil gas samples were collected using the Drive Point Method. At the location of the former UST, a direct push drill rig was utilized to collect soil gas samples for chemical analyses.

Prior to collection of the soil gas samples, a continuous core drill hole was completed to visually inspect and document the soil types encountered. Temporary vapor wells were completed at approximate depths of 5- and 8-feet. A soil vapor probe was constructed within the drill hole using sand-pack and hydrated bentonite to seal the wells annular space. The vapor probe was completed with a gas-tight fitting well cap and sample port. Soil gas samples were collected in summa canisters and chemically analyzed for the presence of TPHg and VOCs. The soil vapor sample locations are presented on Plate 5-2, and the Field Sampling Schedule for soil gas is presented in Table 5-2. A schematic diagram of the well design and sampling train is presented as Plate 5-3.

5.1.3 Quality Analysis/Quality Control Samples
For quality assurance/quality control (QA/QC), approximately 10% of the soil samples were split by the analytical laboratory and chemically analyzed as duplicates for OCPs and lead.

Based on the quantity of soil gas samples collected, duplicate samples were not analyzed.

One equipment blank sample and one field blank sample per soil sampling event (water samples) were also collected and analyzed for the presence of arsenic and lead. The collection of these samples is discussed in more detail in the QAPP presented in Appendix B.

5.2 SAMPLE COLLECTION

5.2.1 Soil Sample Collection
Surface and shallow subsurface soil samples were collected using hand sampling tools including a hand pick and auger. Soil sampling equipment was decontaminated prior to use at each sample collection location and sampling event. Soil samples were collected in 2-inch x 6- 430
CC 06-03-2025
430 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-4
inch stainless steel sleeves. Surface soil was loosened with a hand pick and placed into the sample sleeves. Soil cuttings were placed back in the hole after sample collection.

At select locations soil samples were collected using GeoprobeTM direct-push technology. The drill rod was hydraulically advanced to the desired depth and undisturbed soil samples were collected in 4 to 5-foot continuous core acetate liners. The soil cores were visually inspected and classified by a Padre geologist in accordance with the Unified Soil Classification System (USCS). Direct-push drill holes were backfilled with a tremmied neatcement grout to approximately 6-inches bgs and completed with native soil to surface. Copies of the drill hole logs are presented as Appendix C.

The soil samples were sealed, labeled, and preserved on ice in the field. After completion of soil sampling activities, the soil samples were transferred to a State-certified analytical laboratory under chain-of-custody protocol for chemical analyses. Field sampling methods conformed to guidelines set forth in the Health and Safety Plan included in Appendix E of the PEA Work Plan.

5.2.2 Soil Gas Sample Collection
Soil gas sampling activities were performed in general accordance with the DTSC Advisory- Active Soil Gas Investigations dated April 2012. Soil gas samples were collected from depths of approximately 5-feet and 8-feet using direct-push technology and the following procedure:
• Driving a 1-inch steel rod to the desired depth of the drill hole and then removing the rod;
• Placing a 2 to 3-inch layer of clean sand at the base of the drill hole; • Installing a new plastic vapor implant connected to ¼-inch new Teflon tubing at the top of the clean sand;
• Placing an additional 3-inches of clean sand into the drill hole to cover the vapor implant;
• Placing approximately 1-foot of dry bentonite above the sand pack; • Sealing the drill hole with bentonite hydrated in approximate 1-foot increments; and
• Labeling each drill hole with a unique sample id and depth.

After subsurface conditions had equilibrated (no less than two hours), a shut-in test was performed to check for leaks in the fittings. The shut-in test consisted of assembling the aboveground section of the sampling train (e.g. valve lines, fittings, flow controllers, and Summa canister downstream from the top of the probe), and evacuating the flow lines to a measured vacuum of about 100-inches of water; then shutting the valves at either end of the above ground section of the sampling train including the valve attached to the summa canister and observing the vacuum for a minimum of one minute. If there was any observable loss of vacuum, then the 431
CC 06-03-2025
431 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-5
fittings were adjusted as needed until the vacuum in the aboveground section of the sample train does not noticeably dissipate. After the shut-in test was successful, a leak check was performed. The leak check consisted of applying the leak check compound (1,1-difluoroethane) inside a shroud covering the surface and bentonite seal and tubing. Additionally, the leak check compound was applied near connections along the sample train. The leak-check compound was included in the laboratory analyte list and the laboratory quantified and annotated all detections of the leak-check compound at the reporting limit of the target analytes. The shut-in test and leak check were conducted prior to collecting each soil gas sample.

After performing the shut-in test and leak check, three purge volumes of soil vapor were removed from the sample lines prior to collecting the soil gas sample in 1-liter summa canisters.

As discussed above, during sampling, a leak check compound is used to confirm that the sample train and probe rod is tight and leak free. After purging is complete, the valve at the top of the 1-liter summa was opened to collect the soil gas sample. The flow rate of vapor was monitored and maintained at less than 200-milliliters (mL) per minute using the flow control provided with the canisters. Additionally, during purging and sampling, a calibrated vacuum gauge was used to maintain a vacuum of less than 100-inches of water to minimize stripping and prevent ambient air from diluting the soil gas samples. As the pressure gauge reached just below 5-inches of mercury, the valve was closed and the pressure reading recorded. New tubing and canisters were used for each sample location. Sample canisters were pre-cleaned and supplied by the analytical laboratory.

5.2.3 Decontamination Procedures
All equipment that came into contact with potentially contaminated soil was decontaminated consistently so as to assure the quality of samples collected. Disposable equipment intended for one time use was not decontaminated, but was packaged for appropriate disposal. Decontamination occurred prior to and after each use of a piece of equipment. All sampling devices used were decontaminated using the following procedures:
• Non-phosphate detergent and tap water wash, in a 5-gallon plastic bucket, using a brush;
• Deionized/distilled water rinse, in a 5-gallon plastic bucket; and • Final deionized/distilled water rinse in a 5-gallon plastic bucket.

At the completion of sampling activities the small amount of wash water was dispersed to the ground surface.

5.3 SAMPLE ANALYSES
The sampling schedule is summarized in Tables 5-1 and 5-2. Analytical methods, types of containers, preservative, and holding times are summarized in Table 5-3. The laboratory analytical program consisted of chemical analyses of soil and soil gas samples collected from the Project Site for the presence of:
432
CC 06-03-2025
432 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
5-6
Soil –
• OCPs by U.S. EPA Method 8081A;
• Arsenic by U.S. EPA Method 6020;
• Lead by U.S. EPA Method 6020;
• PCBs by U.S. EPA Method 8082;
• TPHg by U.S. EPA Method 8015M; and
• BTEX, MTBE by U.S. EPA Method 8260.

Soil Gas –
• TPHg, VOCs by U.S. EPA Method TO-15.

5.3.1 Chain-of-Custody Records
Chain-of-custody (COPC) records were used to document sample collection and shipment to the laboratory for analysis. A COPC record accompanied all samples delivered for analysis to McCampbell Analytical, Inc. located in Pittsburg, California. The COPC record identified the contents of each shipment and maintained the custodial integrity of the samples.

Generally, a sample is considered to be in someone’s custody if it is either in someone’s physical possession, in someone’s view, locked up, or kept in a secured area that is restricted to authorized personnel. Until receipt by the laboratory, the custody of the samples was the responsibility of the sample collector.

5.4 FIELD VARIANCES
At the request of the DTSC project manager, an additional soil sample (P-27) was collected along the eastern side of the outbuildings and chemically analyzed for the presence of OCPs and lead.

The PEA Workplan proposed that soil samples P-3, P-7, and P-12 were to be chemically analyzed for the presence of PCBs related to weathered window caulking. However, these samples were not located beneath large window panes and therefore not chemically analyzed for PCBs.

Due to low flow conditions (clay) encountered at 10 feet, a soil gas sample was collected at 8 feet (SV-1-8’). This was discussed with and approved by the DTSC project manager on July 9, 2015.
433
CC 06-03-2025
433 of 1012
Cupertino USD
Project No. 1401-2171
5-7
Table 5-1. Soil Sampling Schedule
Test Method Sample Depth Number of Samples Sample Location Submittal Status Residence and Outbuildings OCPs
U.S. EPA Method 8081A
Surface to 0.5 feet 1.0 to 1.5 feet
18 (discrete) 17 (discrete)
P-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16 25, 26, 27 Dupe ~10% of samples P-1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 25, 26, 27 Dupe ~10% of samples Analyze Analyze
Arsenic
U.S. EPA Method 6020
Surface to 0.5 feet 1.0 to 1.5 feet
3 (discrete) 1 (discrete)
AS-1, 2, and 3 SS-6A
Analyze Analyze
Lead
U.S. EPA Method 6020
Surface to 0.5 feet 1.0 to 1.5 feet
15 (discrete) 15 (discrete)
P-7, 10, 11, 13, 14, 15, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28 Dupe ~10% of samples P-7, 10, 11, 13, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28 Dupe ~10% of samples Analyze Analyze
PCBs
U.S. EPA Method 8082
Surface to 0.5 feet 1.0 to 1.5 feet
7 (discrete) 7 (discrete)
P-4, 9, 10, 11, 14, and 15 P-4, 9, 10, 11, 14, and 15
Analyze Hold
434
CC 06-03-2025
434 of 1012
Cupertino USD - PEA
Project No. 1401-2171
5-8
Table 5-1. Soil Sampling Schedule (continued)
Test Method Sample Depth Number of Samples Sample Location Submittal Status Former Gasoline UST TPHg
U.S. EPA Method 8015m
12 feet 15 feet 20 feet
1 (discrete) 5 (discrete) 5 (discrete)
DH-1 DH-1, 2, 3, 4 and 5 DH-1, 2, 3, 4 and 5
Analyze Analyze Analyze

BTEX, MTBE
U.S. EPA Method 8260
12 feet 15 feet 20 feet
1 (discrete) 5 (discrete) 5 (discrete)
DH-1 DH-1, 2, 3, 4 and 5 DH-1, 2, 3, 4 and 5
Analyze Analyze Analyze
Notes: OCPs – Organochlorine Pesticides PCBs – Polychlorinated Biphenyls TPHg – Total Petroleum Hydrocarbons - Gasoline BTEX – Benzene, toluene, ethylbenzene, xylenes MTBE – Methyl tert butyl ether 435
CC 06-03-2025
435 of 1012
Cupertino USD - PEA
Project No. 1401-2171
5-9
Table 5-2. Soil Gas Sampling Schedule
Sample Matrix and
Test
Method
Sample Depth Number of
Samples*
Sample
Location
Submittal
Status
Soil Gas
TPHg
U.S. EPA Method
TO-15
5-feet
8-feet
1 1
SV-1
SV-1
Analyze
Analyze
VOCs
U.S. EPA Method
TO-15
5-feet
8-feet
1 1
SV-1
SV-1
Analyze
Analyze
Notes:

TPHs – Total Petroleum Hydrocarbons
VOCs – Volatile Organic Compounds
436
CC 06-03-2025
436 of 1012
Cupertino USD - PEA
Project No. 1401-2171
5-10
Table 5-3. Sample Collection Information
Sample Matrix and Test Method Container Preservative
Holding Time
From Sample
Collection to
Extraction
Soil
OCPs
U.S. EPA Method 8081A
2 inch x 6 inch stainless steel sample
sleeves and plastic end caps Ice 14 days
Lead
U.S. EPA Method 6010
2 inch x 6 inch stainless steel sample
sleeves and plastic end caps Ice 180 days
Arsenic
U.S. EPA Method 6020
2 inch x 6 inch stainless steel sample
sleeves and plastic end caps Ice 180 days
PCBs
U.S. EPA Method 8082
2 inch x 6 inch stainless steel sample
sleeves and plastic end caps Ice 14 days
TPHg
U.S. EPA Method 8015m 25 gram EncoreTM Container Ice 48 hrs

BTEX, MTBE
U.S. EPA Method 8260 25 gram EncoreTM Container Ice 48 hrs Soil Gas
TPHg
U.S. EPA Method TO-15 Summa Canister (1 Liter) Keep out of sun /heat 30 days
VOCs
U.S. EPA Method TO-15 Summa Canister (1 Liter) Keep out of sun /heat 30 days
QA/QC Samples (water)
Arsenic and Lead
U.S. EPA Method 200.8 250 mL poly bottle HNO3 / Ice 180 days Notes:

OCPs – Organochlorine Pesticides
PCBs – Polychlorinated Biphenyls
VOCs – Volatile Organic Compounds
TPHg – Total Petroleum Hydrocarbons- Gasoline
HNO3 – Nitric Acid
437
CC 06-03-2025
437 of 1012
438
CC 06-03-2025
438 of 1012
439
CC 06-03-2025
439 of 1012
440
CC 06-03-2025
440 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
6-1

6.0 FINDINGS
The following sections describe the results of the field sampling activities performed by Padre at the Project Site on July 9th and 10th, 2015. The laboratory analytical results are summarized in Table 6-1 through Table 6-6. Certified analytical laboratory reports and chainof-custody documentation are provided in Appendix D.

6.1 SOIL SAMPLING RESULTS
The following subsections describe soil sample analytical results, locations, and depth intervals for soil samples collected at the Project Site.

6.1.1 OCPs
A total of thirty-five discrete surface and subsurface soil samples were collected near the perimeters of the existing building structures and chemically analyzed for the presence of OCPs by U.S. EPA Method 8081A. Results of the laboratory analyses are presented in Table 6-1 with the chlordane results shown on Plate 6-1. Additionally the results are summarized below:
• Chlordane-technical (chlordane) was reported at concentrations ranging from <25 to 13,000 micrograms per kilogram (µg/kg);
• DDD was reported at concentrations ranging from <1.0 to 9.3 µg/kg; • DDE was reported at concentrations ranging from <1.0 to 410 µg/kg; • DDT was reported at concentrations ranging from <1.0 to 260 µg/kg; • Dieldrin was reported at concentrations ranging from <1.0 to 6.8J µg/kg; • g-BHC (lindane) was reported at concentrations ranging from <1.0 to 0.49J µg/kg; • Heptachlor was reported at concentrations ranging from <1.0 to 21 µg/kg; and • Heptachlor epoxide was reported at concentrations ranging from <1.0 to 57 µg/kg.

6.1.2 Lead
A total of thirty discrete surface and subsurface soil samples were collected near the perimeters of the existing building structures and chemically analyzed for the presence of lead by U.S. EPA Method 6020. Results of the laboratory analyses are presented in Table 6-2 and shown on Plate 6-2. Additionally the results are summarized below:
• Lead was reported at concentrations ranging from 9.0 to 310 mg/kg. 441
CC 06-03-2025
441 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
6-2

6.1.3 Arsenic
A total of three discrete surface soil samples and one subsurface soil sample were collected near the northwest corner of Project Site and chemically analyzed for the presence of arsenic by U.S. EPA Method 6020. Results of the laboratory analyses are presented in Table 6-2 and shown on Plate 6-3. Additionally the results are summarized below:
• Arsenic was reported at concentrations ranging from 5.7 to 13 mg/kg.

6.1.4 PCBs
Six discrete surface soil samples were collected from areas below window panes at the residential building and chemically analyzed for the presence of PCBs by U.S. EPA Method 8082. Results of the laboratory analyses are presented in Table 6-3 and summarized below:
• Total PCBs (Aroclors) were not reported at concentrations at or above the reporting limit of 0.05 mg/kg.

6.1.5 TPHg and BTEX
Eleven discrete subsurface soil samples were collected from five locations in the area of the former UST and chemically analyzed for the presence of TPHg and BTEX by U.S. EPA Methods 8215M and 8260, respectively. Results of the laboratory analyses are presented in Table 6-4 and summarized below:
• TPH-g was reported at concentrations ranging from less than 0.081 mg/kg to 0.18 mg/kg;
• Total xylenes were reported at concentrations ranging from less than 0.0032 mg/kg to 0.026 mg/kg; and
• Benzene, toluene and ethylbenzene were not reported at concentrations exceeding their respective analytical reporting limits.

6.2 SOIL GAS SAMPLING RESULTS
The following subsection describes soil gas analytical results, depths, and locations of drill holes advanced at the Project Site.

6.2.1 VOCs
Soil gas samples were collected at approximate depths of 5-feet and 8-feet and chemically analyzed for the presence of VOCs by U.S. EPA Method TO-15. Results of the laboratory analyses are presented in Table 6-5, and are summarized below:
442
CC 06-03-2025
442 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
6-3
• TPH-g was not reported above the reporting limit of 720 micrograms per cubic meter (µg/m3
);
• Benzene was reported at concentrations ranging from less than 1.6 to 2.8 µg/m3 ;
• Toluene was reported at concentrations ranging from 5.6 to 11 µg/m3 ;
• Ethylbenzene was reported at concentrations ranging from 2.9 to 3.4 µg/m3 ;
• Total xylenes (m,p-xylene, o-xylene) was reported at concentrations ranging from less than 6.6 to 12 µg/m3; and
• 2-Hexanone was reported at concentrations ranging from less than 2.1 to 5.6 µg/m3 .

6.3 QA/QC SAMPLES

6.3.1 Duplicates
The laboratory split soil samples selected by Padre that were chemically analyzed as duplicates for OCPs. The results are summarized below:
• Soil samples P-1 (SURF) and P-1 (SURF) DUPE detected comparable concentrations of chlordane (technical), DDE, DDT, and heptachlor epoxide; • Soil samples P-9 (SURF) and P-9 (SURF) DUPE detected comparable concentrations of chlordane (technical), DDE, DDT, and heptachlor epoxide; • Soil sample P-10 (1-1.5’) and P-10 (1-1.5’) DUPE detected comparable concentrations of chlordane (technical), DDE, DDT, and heptachlor epoxide; and • Soil samples P-15 (1-1.5’) and P-15 (1-1.5’) DUPE detected comparable concentrations of DDD, DDE, DDT, and heptachlor epoxide.

The laboratory split soil samples selected by Padre that were chemically analyzed as duplicates for lead. The results are summarized below:
• Soil samples P-17 (SURF) and P-17 (SURF) DUPE reported identical concentrations of lead;
• Soil samples P-27 (SURF) and P-27 (SURF) DUPE reported comparable concentrations of lead;
• Soil samples P-19 (1-1.5’) and P-19 (1-1.5’) DUPE reported comparable concentrations of lead; and
• Soil samples P-24 (1-1.5’) and P-24 (1-1.5’) DUPE reported comparable concentrations of lead.

The reported concentrations for OCPs and lead in selected soil samples and the 443
CC 06-03-2025
443 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
6-4
corresponding duplicate soil samples are comparable in concentration. Therefore, the data is considered to be valid.

6.3.2 Equipment Blank
For each sampling event, distilled water was used as rinseate for decontaminating soil sampling equipment. The equipment blank samples were collected by pouring rinseate water over and through recently cleaned equipment, and collected directly into the appropriate sample container.

Two equipment blank samples were collected and chemically analyzed for arsenic and lead by U.S. EPA Method 200.8. The results of the laboratory analysis are summarized below:
• The laboratory analyses did not identify arsenic at or above the analytical reporting limit. The reporting limit for arsenic was 0.5 micrograms per liter (µg/L); and • The laboratory analyses did not identify lead at or above the analytical reporting limit.

The reporting limit for lead was 0.5 µg/L.

6.3.3 Field Blank
For each sampling event, distilled water was used as rinseate for decontaminating sampling equipment. The field blank samples were collected by pouring rinseate water into the appropriate sample container.

Three field blank samples were collected and chemically analyzed for arsenic and lead by U.S. EPA Method 200.8. The results of the laboratory analysis are summarized below:
• The laboratory analyses did not identify arsenic at or above the analytical reporting limit. The reporting limit for arsenic was 0.5 µg/L; and • The laboratory analyses did not identify lead at or above the analytical reporting limit.

The reporting limit for lead was 0.5 µg/L.

6.3.4 Laboratory QA/QC
A cover letter with the signature of the laboratory manager accompanies every laboratory report received for this project. According to the laboratory manager results reported conform to the most current NELAP standards, where applicable, unless otherwise stated in the case narrative.

Work Order 1507320
The laboratory reported the following notes regarding TPH-g, BTEX, and MTBE in soil by U.S. EPA Method SW8260B:
• The reporting limits for all samples were near, but not identical to, the lab’s standard 444
CC 06-03-2025
444 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
6-5
reporting limit due to the variable encore/solid sample weight; • The surrogate recovery for soil sample DH-1 (15’) was outside of the control limits due to matrix interference;
• The surrogate recovery for soil sample DH-2 (15’) was outside of the control limits due to matrix interference; and
• The spike recovery for sample DH-2 (15’) was outside of the accepted recovery limits.

Work Order 1507327
The laboratory reported the following notes regarding OCPs in soil by U.S. EPA Methods SW8081A/SW8082:
• MS/MSD recovery and/or RPD for lead was out of acceptance criteria but the LCS validated the prep batch;
• DDD was detected above the minimum detection limit and below the practical laboratory reporting limit in soil samples P-5 (SURF), P-9 (1-1.5’), P-12 (1-1.5’), P-14 (1-1.5’), and P-25 (SURF). Therefore, these concentrations are estimated; • DDE was detected above the minimum detection limit and below the practical laboratory reporting limit in soil samples P-2 (1-1.5’) and P-5 (1-1.5’). Therefore, these concentrations are estimated;
• Dieldrin was detected above the minimum detection limit and below the practical laboratory reporting limit in soil samples P-11 (1-1.5’) and P-25 (SURF). Therefore, this concentration is estimated;
• g-BHC was detected above the minimum detection limit and below the practical laboratory reporting limit in the soil sample P-15 (SURF). Therefore, this concentration is estimated;
• Heptachlor was detected above the minimum detection limit and below the practical laboratory reporting limit in soil sample P-14 (SURF). Therefore, this concentration is estimated; and
• Heptachlor epoxide was detected above the minimum detection limit and below the practical laboratory reporting limit in soil samples P-3 (SURF), P-14 (SURF), P-9 (SURF) DUP, P-1 (1-1.5’), P-4 (1-1.5’), P-6 (SURF), P-6 (1-1.5’). Therefore, these concentrations are estimated.
445
CC 06-03-2025
445 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-6
Table 6-1 - Soil Results for OCPs
(results in µg/kg)
Sample
Identification
Aldrin
(a,b,d)-BHC
Gamma-BHC
Chlordanetechnical
DDD
DDE
DDT
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan
Sulfate
Endrin
Endrin
Aldehyde
Endrin Ketone
Heptachlor
Heptachlor
Epoxide
Methoxychlor
Hexachloro
benzene
Hexachloro
cyclopentadiene
Toxaphene
P-1 (SURF) <10 <10 <10 3,700 <10 350 260 <10 <10 <10 <10 <10 <10 <10 <10 23 <10 <100 <200 <500 P-1 (SURF)DUPE <20 <20 <20 2,800 <20 290 210 <20 <20 <20 <20 <20 <20 <20 <20 31 <20 <200 <400 <1,000 P-1 (1-1.5’) <1.0 <1.0 <1.0 87 <1.0 9.5 5.9 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 0.86 J <1.0 <10 <20 <50 P-2 (SURF) <1.0 <1.0 <1.0 120 <1.0 77 44 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 4.8 <1.0 <10 <20 <50 P-2 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 0.46 J <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-3 (SURF) <10 <10 <10 1,200 <10 56 46 <10 <10 <10 <10 <10 <10 <10 <10 4.0 J <10 <100 <200 <500 P-3 (1-1.5’) <1.0 <1.0 <1.0 220 <1.0 6.5 8.2 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-4 (SURF) <1.0 <1.0 <1.0 2,900 <1.0 140 130 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 7.4 <1.0 <10 <20 <50 P-4 (1-1.5’) <10 <10 <10 1,100 <10 44 38 <10 <10 <10 <10 <10 <10 <10 <10 7.8 J <10 <100 <200 <500 P-5 (SURF) <1.0 <1.0 <1.0 63 0.76 J 24 24 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.6 <1.0 <10 <20 <50 P-5 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 0.93 J 1.1 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-6 (SURF) <10 <10 <10 3,400 <10 120 210 <10 <10 <10 <10 <10 <10 <10 <10 6.0 J <10 <100 <200 <500 P-6 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 0.94 J 0.73 J <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-7 (SURF) <10 <10 <10 1,900 <10 120 110 <10 <10 <10 <10 <10 <10 <10 <10 26 <10 <100 <200 <500 P-7 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 1.4 1.1 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-8 (SURF) <1.0 <1.0 <1.0 57 <1.0 14 11 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 3.3 <1.0 <10 <20 <50 P-8 (1-1.5’) <1.0 <1.0 <1.0 <25 1.1 3.9 3.4 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-9 (SURF) <1.0 <1.0 <1.0 2,100 <1.0 53 120 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 13 <1.0 <10 <20 <50 P-9 (SURF) DUPE <10 <10 <10 1,800 <10 47 120 <10 <10 <10 <10 <10 <10 <10 <10 8.3 J <10 <100 <200 <500 P-9 (1-1.5’) <1.0 <1.0 <1.0 38 0.35 J 3.9 12 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-10 (SURF) <1.0 <1.0 <1.0 13,000 <1.0 39 160 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 21 57 <1.0 <10 <20 <50 P-10 (1-1.5’) <1.0 <1.0 <1.0 40 <1.0 1.4 4.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-10 (1-1.5’) DUPE <1.0 <1.0 <1.0 38 <1.0 1.9 4.8 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.0 <1.0 <10 <20 <50 P-11 (SURF) <1.0 <1.0 <1.0 930 <1.0 35 93 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 4.0 <1.0 <10 <20 <50 P-11 (1-1.5’) <1.0 <1.0 <1.0 95 <1.0 12 24 0.53 J <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.8 <1.0 <10 <20 <50 P-12 (SURF) <1.0 <1.0 <1.0 110 <1.0 12 18 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.2 <1.0 <10 <20 <50 P-12 (1-1.5’) <1.0 <1.0 <1.0 <25 0.41 J 2.7 6.3 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-14 (SURF) <1.0 <1.0 <1.0 60 2.2 97 61 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 0.25 J 0.71 J <1.0 <10 <20 <50 P-14 (1-1.5’) <1.0 <1.0 <1.0 <25 0.47 J 14 9.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-15 (SURF) <1.0 <1.0 0.49 J 1,500 <1.0 410 160 6.8 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 11 <1.0 <10 <20 <50 P-15 (1-1.5’) <1.0 <1.0 <1.0 <25 9.3 50 36 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.4 <1.0 <10 <20 <50 HHRA NOTE #3 430
RSLs 39 -- 570 1,700 2,300 2,000 1,900 34 -- -- -- -- -- -- 130 70 -- 210 -- 490 446
CC 06-03-2025
446 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-7
Table 6-1 - Soil Results for OCPs (cont’)
(results in µg/kg)
Sample
Identification
Aldrin
(a,b,d)-BHC
Gamma-BHC
Chlordanetechnical
DDD
DDE
DDT
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan
Sulfate
Endrin
Endrin
Aldehyde
Endrin Ketone
Heptachlor
Heptachlor
Epoxide
Methoxychlor
Hexachloro
benzene
Hexachloro
cyclopentadiene
Toxaphene
P-15 (1-1.5’) DUPE <1.0 <1.0 <1.0 <25 8.9 50 31 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.5 <1.0 <10 <20 <50 P-16 (SURF) <1.0 <1.0 <1.0 170 3.3 4.5 18 2.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.3 <1.0 <10 <20 <50 P-25 (SURF) <1.0 <1.0 <1.0 <25 0.49 J 62 25 0.43 J <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-25 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 2.6 2.7 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-26 (SURF) <1.0 <1.0 <1.0 <25 <1.0 43 23 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-26 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 3.1 1.8 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-27 (SURF) <1.0 <1.0 <1.0 <25 2.8 150 62 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 P-27 (1-1.5’) <1.0 <1.0 <1.0 <25 <1.0 1.3 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <10 <20 <50 Soil Samples (Cornerstone, June 2014) SS-1* <9.9 <9.9 <9.9 <200 21 320 87 <9.9 <9.9 9.9 <9.9 <9.9 <9.9 <9.9 <9.9 <9.9 <9.9 -- -- <200 SS-2* <2.0 <2.0 <2.0 <40 26 280 33 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-3* <2.0 <2.0 <2.0 <39 26 280 33 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <39 SS-4* <2.0 <2.0 <2.0 180 31 230 26 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <39 SS-5* <20 400 280 2,800 26 360 91 <20 <20 <20 <20 <20 <20 <20 <20 <20 <20 -- -- <400 SS-6* <2.0 86 50 520 28 55 26 8.7 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 12 <2.0 -- -- <40 SS-7* <2.0 5.9 3.7 <40 29 240 26 2.9 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-8* <2.0 <2.0 <2.0 <40 21 120 14 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-9* <2.0 7.0 5.5 67 48 260 29 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-10* <2.0 <2.0 <2.0 <40 31 220 16 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-11* <2.0 3.2 3.5 <39 32 180 21 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <39 SS-12* <9.7 25 31 240 17 150 60 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 -- -- <190 SS-13* <2.0 15 12 110 21 42 14 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-14* <9.8 <9.8 <9.8 <200 28 410 88 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 -- -- <200 SS-15* <2.0 3.5 3.9 <40 47 190 26 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 -- -- <40 SS-16* <1.9 <1.9 <1.9 <39 <1.9 8.8 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 <1.9 -- -- <39 HHRA NOTE #3 430
RSLs 39 -- 570 1,700 2,300 2,000 1,900 34 -- -- -- -- -- -- 130 70 -- 210 -- 490 Notes:
µg/kg – micrograms per kilogram
* Surface soil sample (Cornerstone, June 2014)
-- Not reported HHRA – Human Health Risk Assessment Note #3, Table 1 (May 2015).

RSL – U.S. EPA Regional Screening Levels (June, 2015)
3,700 – above RSLs
447
CC 06-03-2025
447 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-8
Table 6-2 - Soil Results for Arsenic and Lead
(results in mg/kg)
Sample
Identification Arsenic Lead
U.S. EPA Method 6020 6020
SS-6A (1-1.5’) 11 --
AS-1 (SURF) 13 --
AS-2 (SURF) 7.2 --
AS-3 (SURF) 5.7 --
P-7 (SURF) -- 39
P-7 (1-1.5’) -- 79
P-10 (SURF) -- 29
P-10 (1-1.5’) -- 9.3
P-11 (SURF) -- 24
P-11 (1-1.5’) -- 13
P-13 (SURF) -- 92
P-13 (1-1.5’) -- 17
P-14 (SURF) -- 36
P-15 (SURF) -- 220
P-17 (SURF) -- 310
P-17 (SURF) DUP -- 310
P-17 (1-1.5’) -- 43
P-18 (SURF) -- 93
P-18 (1-1.5’) -- 17
P-19 (SURF) -- 180
P-19 (1-1.5’) -- 31
P-19 (1-1.5’) DUPE -- 27
P-20 (SURF) -- 35
P-20 (1-1.5’) -- 11
P-21 (SURF) -- 40
P-21 (1-1.5’) -- 9.4
P-23 (SURF) -- 42
P-23 (1-1.5’) -- 13
Screening Level 12A 80B
448
CC 06-03-2025
448 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-9
Table 6-2 - Soil Results for Arsenic and Lead (cont’)
(results in mg/kg)
Sample
Identification Arsenic Lead
U.S. EPA Method 6020 6020
P-24 (SURF) -- 83
P-24 (1-1.5’) -- 10
P-24 (1-1.5’) DUP -- 9.0
P-25 (SURF) -- 47
P-25 (1-1.5’) -- 9.8
P-26 (SURF) -- 29
P-26 (1-1.5’) -- 12
P-27 (SURF) -- 64
P-27 (SURF) DUP -- 39
P-27 (1-1.5’) -- 14
P-28 (SURF) -- 150
P-28 (1-1.5’) -- 12
Screening Level 12A 80B
Notes:
mg/kg milligrams per kilogram
‘--‘ Not analyzed
150 Above screening level
A School Site Screening level from DTSC Guidance (4/30/08) B California Human Health Screening Level (CHSSL)
449
CC 06-03-2025
449 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-10
Table 6-2 - Soil Results for Arsenic and Lead (cont’)
(results in mg/kg)
Sample
Identification Arsenic Lead
U.S. EPA Method 6020 6020
SS-1* 11 40
SS-2* 12 100
SS-3* 8.7 20
SS-4* 7.3 23
SS-5* 13 51
SS-6* 15 75
SS-7* 8.0 20
SS-8* 7.8 18
SS-9* 7.8 42
SS-10* 8.9 27
SS-11* 6.4 19
SS-12* 8.2 72
SS-13* 5.2 52
SS-14* 8.9 33
SS-15* 6.6 22
SS-16* 6.8 9.0
Screening Level 12A 80B
Notes:
mg/kg milligrams per kilogram
‘*‘ Surface soil sample (Cornerstone, June 2014)
100 Above screening level
A School Site Screening level from DTSC Guidance (4/30/08) B California Human Health Screening Level (CHSSL)
450
CC 06-03-2025
450 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-11
Table 6-3 - Soil Results for PCBs
(results in mg/kg)
Sample
Identification
Aroclor
1016
Aroclor
1221
Aroclor
1232
Aroclor
1242
Aroclor
1248
Aroclor
1254
Aroclor
1260
PCBs
Total
P-4 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05P-9 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 P-10 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05P-11 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05P-14 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05P-15 (SURF) <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 RSLs 0.23 0.17 0.17 0.23 0.23 0.12 0.24 0.24
Notes: mg/kg – milligrams per kilogram RSLs– U.S. EPA Regional Screening Level (June 2015) 451
CC 06-03-2025
451 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-12
Table 6-4 – Soil Results for TPHg, BTEX, and MTBE
(results in mg/kg)
Sample
Identification
TPHGasoline
(C6 –C12)
Benzene Toluene EthylBenzene
Total
Xylenes MTBE
U.S. EPA
Method 8260 8260 8260 8260 8260 8260
DH-1 (12’) 0.18 <0.0034 <0.0034 <0.0034 0.026 <0.0034
DH-1 (15’) <0.081 <0.0033 <0.0033 <0.0033 <0.0033 <0.0033 DH-1 (20’) <0.081 <0.0032 <0.0032 <0.0032 <0.0032 <0.0032 DH-2 (15’) <0.084 <0.0034 <0.0034 <0.0034 <0.0034 <0.0034 DH-2 (20’) <0.081 <0.0033 <0.0033 <0.0033 <0.0033 <0.0033 DH-3 (15’) <0.087 <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 DH-3 (20’) <0.092 <0.0037 <0.0037 <0.0037 <0.0037 <0.0037 DH-4 (15’) <0.088 <0.0035 <0.0035 <0.0035 <0.0035 <0.0035 DH-4 (20’) <0.082 <0.0033 <0.0033 <0.0033 <0.0033 <0.0033 DH-5 (15’) <0.13 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 DH-5 (20’) <0.14 <0.0057 <0.0057 <0.0057 <0.0057 <0.0057 HHRA Note #3 0.33 1,100
RSL 1.2 4,900 5.8 650 47
Notes:

TPH – Total Petroleum Hydrocarbons
BTEX – Benzene, toluene, ethylbenzene, total xylenes
MTBE – Methyl tert butyl ether
HHRA – Human Health Risk Assessment Note #3, Table 1
RSL – U.S. EPA Regional Screening Level (June 2015)
452
CC 06-03-2025
452 of 1012
Cupertino USD - PEA
Project No. 1401-2171
6-13
Table 6-5 - Soil Gas Results for TPHg and VOCs
by EPA Method TO-15 (µg/m3 of Vapor)
Sample
ID
TPH-Gasoline
Benzene
Toluene
Ethylbenzene
Total Xylenes
Methyl-t butyl ether
(MTBE)
2-Hexanone
All Other VOCs
SV-1 (5’) <720 <1.6 5.6 2.9 <6.6 <1.8 <2.1 <1.3 SV-1 (8’) <720 2.8 11 3.4 12 <1.8 5.6 <1.3 HHRA Note #3 97 310,000 1,100 100,000 11,000 31,000
RSLs 31,000 360 5,200,000 1,100 100,000 11,000 31,000
Notes:
µg/m3 – micrograms per cubic meter
TPHg – Total Petroleum Hydrocarbons as Gasoline HHRA – Human Health Risk Assessment Note #3, Table 3. Screening level includes attenuation factor (0.001) for future residential structures. “—“ - not established or not used RSL – USEPA Regional Screening Level (June 2015). Screening level includes attenuation factor (0.001) for future residential structures. 453
CC 06-03-2025
453 of 1012
454
CC 06-03-2025
454 of 1012
455
CC 06-03-2025
455 of 1012
456
CC 06-03-2025
456 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 7-1

7.0 HUMAN HEALTH SCREENING-LEVEL EVALUATION

7.1 CHEMICALS OF POTENTIAL CONCERN
The COPCs used in the human health screening-level evaluation for the Project Site completed by Padre included those compounds that were reported at concentrations at or in excess of their respective analytical laboratory reporting limits. Therefore, the following COPCs in soil and soil gas were evaluated:

Soil
• OCPs – chlordane, DDD, DDE, DDT, dieldrin, gamma-BHC (lindane), heptachlor, and heptachlor epoxide;
• Metals – Arsenic and lead; and
• VOCs – TPH-g and total xylenes.

Soil Gas
• VOCs – benzene, toluene, ethylbenzene, total xylenes, and 2-hexanone.

7.2 SOIL RISK ASSESSMENT
The DTSC-modified screening levels or the U.S. EPA RSLs (if DTSC-modified screening levels were not available) were used to conduct a screening-level human health risk assessment using the residential land-use scenario. Carcinogenic screening levels are typically based on a predicted excess long-term cancer risk of one in a million. Non-carcinogenic screening levels are based on maintaining the daily COPC intake below the level at which deleterious health effects are considered possible.

In accordance with PEA guidance documents and DTSC’s Human Health Risk Assessment (HHRA) Note No.3, dated May 2015, the maximum detected chemical concentrations in soil were evaluated as potential exposure point concentrations (EPCs). The EPCs were compared to their respective screening levels. The ratio of an EPC to the corresponding carcinogenic screening level was multiplied by 1E-06 to estimate the chemicalspecific screening cancer risk. For noncarcinogens, the chemical-specific hazard index is the ratio of the EPC to the screening level based on noncarcinogenic effects. The sums of the chemical-specific screening cancer risk and screening hazard index are the cumulative screening cancer risk and hazard index, respectively.

The total risk from COPCs identified in soils at the Project Site was estimated to be

3.2 x 10-5, which provides an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The total health hazard from COPCs identified in soils at the Project Site was estimated to be 0.46, which does not present an increased health hazard (i.e., >1). Therefore, a response action to reduce or eliminate the COPCs identified in surficial soils at the Project Site is recommended.

The results of the screening-level evaluation are presented in Table 7-1. 457
CC 06-03-2025
457 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 7-2
Arsenic concentrations ranged from 5.2 to 15 mg/kg in soil samples collected from across the Project Site. The arsenic data set consisted of four soil samples collected as part of the PEA, and 16 soil samples previously collected as part of a preliminary soil evaluation completed by others (Cornerstone, 2014). The four PEA soil samples were collected as stepout and step-down samples at the location of soil sample SS-6, which reported the highest Project Site arsenic concentration at 15 mg/kg. Arsenic concentrations reported for the PEA soil samples ranged from 5.7 to 13 mg/kg, indicating that arsenic concentrations in soil at this location do not present a potential “hotspot” for arsenic in soil. A statistical evaluation was performed by calculating the 95% Upper Confidence Limit (UCL) for the arsenic data set. The 95% UCL for arsenic in soil at the Project Site was calculated to be 10 mg/kg. A graphical evaluation completed by creating a normal probability plot of the arsenic data set. The shape of the plotted data presents a relatively normal distribution. Therefore, arsenic concentrations identified in surface soil at the Project Site are representative of ambient concentrations and further assessment and/or remedial action for arsenic in soil is not warranted. A copy of the normal probability plot and ProUCL output sheet are presented in Appendix E.

Lead concentrations ranged from 9.0 mg/kg to 310 mg/kg in soil samples collected across the Project Site. A risk assessment was performed using the DTSC lead risk assessment spreadsheet model (LeadSpread Version 8). Based on the LeadSpread output, exposure to the lead concentrations detected at the Project Site will result in a 90th percentile blood lead concentration of 8.0 µg/dl in children which exceeds the Office of Environmental Health Hazard Assessment (OEHHA) blood toxicity level of 1 µg/l. Therefore, a response action to reduce or eliminate the lead-impacted soil is recommended. A copy of the LeadSpread Risk Assessment Spreadsheet is presented in Appendix E.

7.3 SOIL GAS RISK ASSESSMENT
The objective of the soil gas survey was to evaluate shallow soil gas beneath the Project Site for potential VOC impacts. The source of the potential impacts was identified to be a former 500-gallon UST located on the northeast side of the Project Site. Several low level VOCs constituents, including BTEX, were identified in soil gas samples collected at the Project Site. Therefore, a risk evaluation was performed.

DTSC’s SG Screen Version 2.0 (4/03) (DTSC modification December 2014) Screening Level Model for Soil Gas Contamination (based on the Johnson-Ettinger Indoor Vapor Intrusion Model) was used to estimate the cumulative risk and hazard associated with the carcinogenic and the non-carcinogenic constituents detected in soil gas. Soil vapor drill holes were advanced at the former location of the UST. Based on the soil conditions encountered and potential future building construction, the following parameters were used for the screening evaluation:
• Soil gas sample collection depths were approximately 5 and 8-feet; • Static groundwater was not encountered;
• The highest constituent concentrations were used from each sample depth; 458
CC 06-03-2025
458 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 7-3
• The depth below grade to bottom of enclosed space floor (LF) is 15-centimeters (slab-on-grade);
• The general soil type encountered (within upper 8 feet) was classified as clay (CL); and
• Conservative default values were used for the remaining input parameters.

The leak check compound (1,1-difluoroethane) was not detected in any of the soil gas samples. Therefore, the collected soil gas samples are representative of shallow soil gas conditions at the Project Site.

The results of the soil gas assessment conducted at the Project Site identified low level concentrations of benzene, toluene, ethylbenzene, and total xylenes (BTEX), as well as 2- hexanone. However, none of the VOC constituents exceeded their respective human health screening levels. The results of the PEA screening level risk assessment calculated that the total risk from COPCs identified in soil gas was estimated to be 8.6 x 10-9, which does not provide an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The cumulative hazard is estimated to be 0.0003, which does not provide a significant health hazard (>1). Therefore, further assessment and/or remediation regarding VOCs identified in soil gas at the Project Site is not warranted. Results of the soil gas model are summarized in Table 7-2, and copies of the screening level model spreadsheets are included as Appendix E. 459
CC 06-03-2025
459 of 1012
Table 7‐1
Soil Exposure Screening Evaluation
Sedgwick Elementary School Expansion Project
Cupertino Union School District
Screening
Level (mg/kg) Source Cancer Risk Screening Level (mg/kg) Source Hazard Index Chlordane 13 0.43 HHRA Note #3 3.02E‐05 34 RSL 3.82E‐01 DDD 0.0093 2.3 RSL 4.04E‐09 37 Surrogate RSL 2.51E‐04
DDE 0.41 2 RSL 2.05E‐07 37 Surrogate RSL 1.11E‐02DDT 0.26 1.9 RSL 1.37E‐07 37 RSL 7.03E‐03 Dieldrin 0.0068 0.034 RSL 2.00E‐07 3.2 RSL 2.13E‐03
g‐BHC (lindane) 0.00049 0.57 RSL 8.60E‐10 21 RSL 2.33E‐05 Heptachlor 0.021 0.13 RSL 1.62E‐07 39 RSL 5.38E‐04
Heptachlor Epoxide 0.057 0.07 RSL 8.14E‐07 1 RSL 5.70E‐02TPH‐aromatic low 0.18 nc RSL NA 82 RSL 2.20E‐03 Total Xylenes 0.026 nc RSL NA 650 RSL 4.00E‐05
Total Risk: 3.18E‐05 Total Hazard: 4.63E‐01
Notes:COPC = chemical of potential concernEPC = exposure point concentrationExposure Point Concentration = maximum detected concentration in soil samples collected at the site HHRA = Human Health Risk Assessment Note #3, Table 1 (DTSC HERO, May 2015)RSL = regional screening level for residential soil (U.S.EPA June 2015)mg/kg = milligrams per kilogramSurrogate RSL = RSL not established for DDD, DDE. RSL for DDT was used as a surrogate value.nc = non‐carcinogenic NE = not establishedNA = not applicable COPC
Exposure‐Point
Concentration
(mg/kg)
Carcinogenic Risk Non‐carcinogenic Hazard
460
7-4
CC 06-03-2025
460 of 1012
Cupertino USD - PEA
Project No. 1401-2171
7-5
Table 7-2. Results of Soil Gas Screening Level Risk Assessment Project Site Soils (0-8 feet bgs) Project Site Soils (0-8 feet bgs) COPC (1) Risk by COPC (2) COPC (1) Hazard by COPC (3)
Benzene 7.7E-09 Benzene 2.4E-04
Toluene NA Toluene 8.2E-06
Ethylbenzene 8.5E-10 Ethylbenzene 9.2E-07
Xylenes NA Xylenes 2.4E-05
4-Methyl-4-pentanone (MIBK) NA 4-Methyl-4-pentanone (MIBK) 3.9E-07 Total Risk (4) Total Hazard (5)
Risk by Pathway 8.6E-09 Hazard by Pathway 2.7E-04
Notes
(1) Chemical of Potential Concern (COPC)
(2) Risk from each COPC (Cumulative)
(3) Hazard from each COPC (Cumulative)
(4) Total calculated cancer risk
(5) Total calculated hazard quotient
NA Not Applicable
461
CC 06-03-2025
461 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 8-1

8.0 ECOLOGICAL SCREENING
A detailed ecological screening evaluation was not performed as part of the PEA because the Project Site has been developed as a residential property since the 1950s. Natural wildlife areas were not noted at the Project Site during the course of the PEA. Therefore, based on the available information, there does not appear to be a significant pathway of exposure to nonhuman, sensitive ecological species.
462
CC 06-03-2025
462 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 9-1

9.0 CONCLUSIONS AND RECOMMENDATIONS
The purpose of the PEA was to establish whether a release or potential release of hazardous substances, which potentially pose a threat to human health via ingestion, dermal contact, and inhalation exposure pathways, exists at the Project Site.

Evaluation
The COPCs used in the human health screening-level evaluation for the Project Site included those compounds that were reported at concentrations at or above their respective analytical laboratory reporting limits. Therefore, the following COPCs were evaluated:

Soil
• OCPs – chlordane, DDD, DDE, DDT, dieldrin, gamma-BHC (lindane), heptachlor, and heptachlor epoxide;
• Metals – Arsenic and lead; and
• VOCs – TPH-g and total xylenes.

Soil Gas
• VOCs – benzene, toluene, ethylbenzene, total xylenes, and 2-hexanone.

Risk Assessment
The results of the PEA screening level risk assessment estimated the total risk from COPCs identified in soils at the Project Site to be 3.2 x 10-5, which provides an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The total health hazard from COPCs identified in soils at the Project Site is estimated to be 0.46, which does not provide an increased health hazard (i.e., >1). Therefore, a response action to reduce and/or eliminate the COPCs identified in surficial soils at the Project Site is recommended.

Lead concentrations ranged from 9.0 to 310 mg/kg in soil samples collected throughout the Project Site. Using DTSC’s lead risk assessment spreadsheet model (LeadSpread Version 8), exposure to the lead concentrations identified at the Project Site would result in a 90th percentile blood lead concentration of 8.0 micrograms per deciliter (µg/dl) in children, which exceeds OEHHA’s blood toxicity level of 1 µg/dl. Therefore, a response action to reduce or eliminate lead-impacted soil is recommended.

Arsenic concentrations ranged from 5.2 to 15 mg/kg in soil samples collected from across the Project Site. The arsenic data set consisted of four soil samples collected as part of the PEA, and 16 soil samples previously collected as part of a preliminary soil evaluation completed by others (Cornerstone, 2014). The four PEA soil samples were collected as stepout and step-down samples at the location of soil sample SS-6, which reported the highest Project Site arsenic concentration at 15 mg/kg. Arsenic concentrations reported for the PEA soil samples ranged from 5.7 to 13 mg/kg, indicating that arsenic concentrations in soil at this 463
CC 06-03-2025
463 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL 9-2
location do not present a potential “hotspot” for arsenic in soil. A statistical evaluation was performed by calculating the 95% Upper Confidence Limit (UCL) for the arsenic data set. The 95% UCL for arsenic in soil at the Project Site was calculated to be 10 mg/kg. A graphical evaluation completed by creating a normal probability plot of the arsenic data set. The shape of the plotted data presents a relatively normal distribution. Therefore, arsenic concentrations identified in surface soil at the Project Site are representative of ambient concentrations and further assessment and/or remedial action for arsenic in soil is not warranted.

Results of the soil gas assessment conducted at the Project Site identified low level concentrations of benzene, toluene, ethylbenzene, total xylenes (BTEX), and 2-hexanone.

However, none of the VOC constituents exceeded their respective human health screening levels. The results of the PEA screening level risk assessment calculated that the total risk from COPCs identified in soil gas was estimated to be 8.6 x 10-9, which does not provide an increased cancer risk of greater than 1 in 1,000,000 (>10-6). The cumulative hazard is estimated to be 0.0003, which does not provide a significant health hazard (>1). Therefore, further assessment and/or remediation regarding VOCs identified in soil gas at the Project Site is not warranted.

Recommendations
Based on the results of the PEA, soil and soil gas at the location of the former 500-gallon capacity gasoline UST has not been significantly impacted from the former presence of the UST. Subsurface soil in the area of the UST generally consists of a stiff clay material, and any residual petroleum hydrocarbons in soil will degrade over time by natural attenuation processes.

Therefore, further assessment and/or remediation regarding the former UST is not warranted.

Based on the results of the PEA, chlordane and lead have been identified in surface soils at the Project Site at concentrations exceeding their respective human health screening levels. The total increased cancer risk from chlordane identified in soils at the Project Site is estimated to be 3.2 x 10-5, which exceeds DTSC’s ‘point of departure’ of 1 in 1,000,000 (>10-6).

Due to elevated concentrations of chlordane and lead identified in surface soil around existing structures located at the Project Site, Padre recommends a response action to reduce or eliminate the potential impact of these contaminants. The recommended remedial action is excavation, removal, and offsite disposal at an appropriate landfill. Prior to the response action, Padre recommends conducting a Supplemental Site Investigation (SSI) to further define chlordane and lead impacts around the structures.
464
CC 06-03-2025
464 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
10-1

10.0 REFERENCES
California, Department of Water Resources (http://www.water.ca.gov/waterdatalibrary/) California, Department of Water Resources, Evaluation of Groundwater Resources South San Francisco Bay Volume III Northern Santa Clara County Area: Bulletin 118-1, December 1975.

California Division of Mines and Geology, Geologic Map of San Francisco – San Jose Quadrangle California, (1:250,000), 1990 (Second Printing 2005).

California Geological Survey, 2000, A General Location Guide For Ultramafic Rocks in California - Areas More Likely to Contain Naturally Occurring Asbestos. Open File Report 2000-19.
2002, Guidelines for Geologic Investigations of Naturally Occurring Asbestos in California. Special Publication 124.

California, State Water Resources Control Board Geotracker website (http://geotracker.swrcb.ca.gov).

Cornerstone Earth Group, Phase I Environmental Site Assessment and Preliminary Soil Quality Evaluation, 10480 Finch Avenue, Cupertino, California, July 11, 2014.

County of Santa Clara - Assessor’s Office
County of Santa Clara – Planning Deparment
Cupertino, City of, General Plan 2000-2020, Adopted 2005.

Department of Toxic Substances Control, Envirostor Database, (http://www.envirostor.dtsc.ca.gov/public/).

Department of Toxic Substances Control, Interim Guidance, Evaluation of School Sites with Potential Contamination as a Result of Lead from Lead-Based-Paint, Organochlorine Pesticides from Temiticides, and Polychlorinated Biphenyls from Electrical Transformers, revised June 9, 2006.

Department of Toxic Substances Control, Preliminary Environmental Assessment Guidance Manual, January 1994, Interim Final – Final October 2013.

Department of Toxic Substances Control, Advisory – Active Soil Gas Investigations, April 2012..

Duggan, Mary Ann, P.E., Director – Facility Modernization – Cupertino Union SD Google Earth.
465
CC 06-03-2025
465 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Cupertino_PEA Report_FINAL
10-2
Jennings and Bryant, 2010, Fault Activity Map of California, California Geological Survey.

Norris, R. M., & R. W. Webb, 1976 (Second Edition 1990), Geology of California, John Wiley & Sons, New York, pp. 412-427.

Padre Associates, Inc., Geologic Hazards Report, Sedgwick Elementary School Expansion Project, 10480 Finch Avenue, Cupertino, Santa Clara County, California, January 2015.

Padre Associates, Inc., Preliminary Environmental Assessment Work Plan, Sedgwick Elementary School Expansion Project, 10480 Finch Avenue, Cupertiono, Santa Clara County, California, May 2015.

United States Department of Agriculture, National Resources Conservation Service, Web Soil Survey (http://websoilsurvey.nrcs.usda.gov/app/).

USGS Geological Survey; Cupertino Quadrangle, California, Topographic Map, 1991. 466
CC 06-03-2025
466 of 1012

APPENDIX A

DTSC CORRESPONDENCE
467
CC 06-03-2025
467 of 1012
468
CC 06-03-2025
468 of 1012
469
CC 06-03-2025
469 of 1012
470
CC 06-03-2025
470 of 1012

APPENDIX B

QUALITY ASSURANCE PROJECT PLAN (QAPP)
471
CC 06-03-2025
471 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171

APPENDIX B

QUALITY ASSURANCE/QUALITY CONTROL
(QA/QC) PROCEDURES
The QA/QC procedures will be employed in both the field and the laboratory. QA/QC samples include the collection of equipment rinsate samples, field blank samples, and duplicate split samples.

FIELD QA/QC PROCEDURES
Field QA/QC procedures will be performed at the site and consist of the following measures:
 Chain-of-Custody (COC) forms will be used for sample submittal to the laboratory; and
 Daily information regarding sample collection will be recorded by Padre in Field Logbooks. Sample types, soil descriptions, sample identification numbers, and sample times will be collected and recorded on Field Data Sheets and in the Field Logbooks. Pages will be numbered, dated, and signed by the person performing data entry.

Field QA/QC samples will be collected and submitted for analysis along with the discrete soil samples using the following sampling frequency:
 Equipment blanks - One equipment rinsate blank per sample event;  Field blanks - One field blank sample per sample event; and  Field duplicates – Approximately 10% of the collected samples will be analyzed as duplicate samples for select chemical analyses.

Equipment Rinseate Blanks
An equipment rinseate blank (equipment blank) will be collected from the final water rinsed over equipment after cleaning activities have been performed. The equipment blank will be collected from non-dedicated (reusable) sampling equipment such as soil sampling tools.

The equipment blank will be analyzed for arsenic using the same analytical method used on the unique soil samples.

To collect an equipment blank sample, rinse water will be carefully poured over or through the recently cleaned equipment, and collected directly into an appropriate sample container held over a bucket. Equipment blank samples will be labeled and handled in the same manner as all other samples.
472
CC 06-03-2025
472 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
Field Blanks
Field blank samples consist of a sample of the deionized water that was used to rinse sampling equipment during equipment cleaning activities. The purpose of the field blank sample is to evaluate the rinse water for compounds detected in the soil samples. A field blank sample will be collected by pouring rinse water into the appropriate sample container. The field blank will be analyzed for arsenic using the same analytical method used on the unique soil samples, and the field blank samples will be handled in the same manner as all other samples.

Duplicate Samples
Duplicate soil sample(s) will be analyzed in order to evaluate the analytical procedures and methods employed by the laboratory. The field duplicate sample(s) will be selected from the original soil samples, and split by the laboratory. Duplicate soil samples will be analyzed for OCPs and lead.

Duplicate soil gas sample(s) will be collected immediately after the original sample, in separate sample containers, at the same location and depth. Duplicate soil gas samples will be analyzed for VOCs.

Laboratory QA/QC Procedures
Laboratory QA/QC procedures include the following:
 Laboratory analyses will be performed within the required holding time for all samples;
 Appropriate minimum reporting limits (RLs) will be used for each analysis;  A state-certified hazardous waste testing laboratory will conduct the required analysis;
 The laboratory will provide the following information for each sample:
- Method blank data;
- Surrogate recovery, instrument tuning, and calibration data; and - Signed laboratory reports including the sample designation, date of sample collection, date of sample analysis, laboratory analytical method employed, sample volume, and the minimum RL.

To determine whether Quality Assurance/Quality Control (QA/QC) requirements for sampling and analysis were met for the project, and to determine whether the data are usable for risk assessment purposes, a cursory data validation review will be done on the data summary package provided by the laboratory. This review will include an evaluation of chain-ofcustody documentation, holding times, reporting limits, precision and accuracy of goals, representativeness, and completeness of the data. QA/QC requirements that are not met will 473
CC 06-03-2025
473 of 1012
Cupertino Union SD - PEA
Project No. 1401-2171
be evaluated in the ‘uncertainty’ portion of the risk assessment. Documentation of the data validation review will be included with the PEA report.

Detection Limits
Detection limits for OCPs and metals that will be met by the analytical laboratory are listed in the following DTSC document(s), and are attached:
 DTSC’s Advisory – Active Soil gas Investigations, dated April 2012, and  DTSC, Interim Guidance, Evaluation of School Sites with Potential Contamination as a Result of Lead from Lead-Based-Paint, Organochlorine Pesticides from Temiticides, and Polychlorinated Biphenyls from Electrical Transformers, revised June 9, 2006.

Padre proposes to utilize McCampbell Analytical Inc. (McCampbell) located in Pittsburg, California to provide the required chemical analyses of collected soil, soil gas, and water samples. McCampbell is certified (No. 1644) by the California State Environmental Laboratory Accreditation Program Branch to provide the required chemical analyses. 474
CC 06-03-2025
474 of 1012

APPENDIX C

DRILL HOLE LOGS
475
CC 06-03-2025
475 of 1012
476
CC 06-03-2025
476 of 1012
477
CC 06-03-2025
477 of 1012
478
CC 06-03-2025
478 of 1012
479
CC 06-03-2025
479 of 1012
480
CC 06-03-2025
480 of 1012

APPENDIX D

ANALYTICAL LABORATORY REPORTS AND CHAIN-OF CUSTODYS
481
CC 06-03-2025
481 of 1012
WorkOrder:

Report Created for: Padre Associates. Inc.
555 University Ave., Suite 110
Sacramento, CA 95825
Project Contact: Alan J. Klein
Project Name: #1401-2171; CUPERTINO (SEDGWICK PEA)
Project P.O.:

Project Received: 07/13/2015
Analytical Report reviewed & approved for release on 07/22/2015 by:

Angela Rydelius,
Laboratory Manager
1507427
The report shall not be reproduced except in full, without the written approval of the laboratory.

The analytical results relate only to the items tested. Results reported conform to the most current NELAP standards, where applicable, unless otherwise stated in the case narrative.

Amended: 07/24/2015
Analytical Report
1534 Willow Pass Rd. Pittsburg, CA 94565 ♦ TEL: (877) 252-9262 ♦ FAX: (925) 252-9269 ♦ www.mccampbell.com NELAP: 4033ORELAP ♦ ELAP: 1644 ♦ ISO/IEC: 17025:2005 ♦ WSDE: C972-11 ♦ ADEC: UST-098 ♦ UCMR3 McCampbell Analytical, Inc.
"When Quality Counts"

Page 1 of 85 ends

482
CC 06-03-2025
482 of 1012
Glossary of Terms & Qualifier Definitions
Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
WorkOrder: 1507427
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Glossary Abbreviation
95% Interval 95% Confident Interval
DF Dilution Factor
DI WET (DISTLC) Waste Extraction Test using DI water
DISS Dissolved (direct analysis of 0.45 µm filtered and acidified water sample) DUP Duplicate
EDL Estimated Detection Limit
ITEF International Toxicity Equivalence Factor
LCS Laboratory Control Sample
MB Method Blank
MB % Rec % Recovery of Surrogate in Method Blank, if applicable MDL Method Detection Limit
ML Minimum Level of Quantitation
MS Matrix Spike
MSD Matrix Spike Duplicate
N/A Not Applicable
ND Not detected at or above the indicated MDL or RL
NR Data Not Reported due to matrix interference or insufficient sample amount.

PF Prep Factor
RD Relative Difference
RL Reporting Limit (The RL is the lowest calibration standard in a multipoint calibration.) RPD Relative Percent Deviation
RRT Relative Retention Time
SPK Val Spike Value
SPKRef Val Spike Reference Value
SPLP Synthetic Precipitation Leachate Procedure
TCLP Toxicity Characteristic Leachate Procedure
TEQ Toxicity Equivalents
WET (STLC) Waste Extraction Test (Soluble Threshold Limit Concentration) Analytical Qualifiers
J Result is less than the RL but greater than the MDL. The reported concentration is an estimated value.

Quality Control Qualifiers
F1 MS/MSD recovery and/or RPD was out of acceptance criteria; LCS validated the prep batch.

Page 2 of 85 ends

483
CC 06-03-2025
483 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-4 (SURF) 1507427-007A Soil 07/09/2015 12:44 GC22 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/21/2015 11:37
a-BHC ND 0.00010 0.0010 1 07/21/2015 11:37
b-BHC ND 0.00025 0.0010 1 07/21/2015 11:37
d-BHC ND 0.00037 0.0010 1 07/21/2015 11:37
g-BHC ND 0.000097 0.0010 1 07/21/2015 11:37
Chlordane (Technical) 2.9 0.16 0.25 10 07/21/2015 20:46 a-Chlordane 0.32 0.0047 0.010 10 07/21/2015 20:46
g-Chlordane 0.20 0.0021 0.010 10 07/21/2015 20:46
p,p-DDD ND 0.00014 0.0010 1 07/21/2015 11:37
p,p-DDE 0.14 0.0032 0.010 10 07/21/2015 20:46
p,p-DDT 0.13 0.0043 0.010 10 07/21/2015 20:46
Dieldrin ND 0.00033 0.0010 1 07/21/2015 11:37
Endosulfan I ND 0.00065 0.0010 1 07/21/2015 11:37
Endosulfan II ND 0.00020 0.0010 1 07/21/2015 11:37
Endosulfan sulfate ND 0.00063 0.0010 1 07/21/2015 11:37 Endrin ND 0.00042 0.0010 1 07/21/2015 11:37
Endrin aldehyde ND 0.00020 0.0010 1 07/21/2015 11:37
Endrin ketone ND 0.00013 0.0010 1 07/21/2015 11:37
Heptachlor ND 0.00021 0.0010 1 07/21/2015 11:37
Heptachlor epoxide 0.0074 0.00020 0.0010 1 07/21/2015 11:37 Hexachlorobenzene ND 0.00027 0.010 1 07/21/2015 11:37
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/21/2015 11:37 Methoxychlor ND 0.00089 0.0010 1 07/21/2015 11:37
Toxaphene ND 0.035 0.050 1 07/21/2015 11:37
Aroclor1016 ND 0.0051 0.050 1 07/21/2015 11:37
Aroclor1221 ND 0.011 0.050 1 07/21/2015 11:37
Aroclor1232 ND 0.0063 0.050 1 07/21/2015 11:37
Aroclor1242 ND 0.0067 0.050 1 07/21/2015 11:37
Aroclor1248 ND 0.0040 0.050 1 07/21/2015 11:37
Aroclor1254 ND 0.0068 0.050 1 07/21/2015 11:37
Aroclor1260 ND 0.0061 0.050 1 07/21/2015 11:37
PCBs, total ND 0.0040 0.050 1 07/21/2015 11:37
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 124 70-130 07/21/2015 20:46
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 3 of 85 ends

484
CC 06-03-2025
484 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-9 (SURF) 1507427-017A Soil 07/09/2015 14:20 GC22 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/24/2015 07:01
a-BHC ND 0.00010 0.0010 1 07/24/2015 07:01
b-BHC ND 0.00025 0.0010 1 07/24/2015 07:01
d-BHC ND 0.00037 0.0010 1 07/24/2015 07:01
g-BHC ND 0.000097 0.0010 1 07/24/2015 07:01
Chlordane (Technical) 2.1 0.16 0.25 10 07/20/2015 14:15 a-Chlordane 0.25 0.0047 0.010 10 07/20/2015 14:15
g-Chlordane 0.17 0.0021 0.010 10 07/20/2015 14:15
p,p-DDD ND 0.00014 0.0010 1 07/24/2015 07:01
p,p-DDE 0.053 0.0032 0.010 10 07/20/2015 14:15
p,p-DDT 0.12 0.0043 0.010 10 07/20/2015 14:15
Dieldrin ND 0.00033 0.0010 1 07/24/2015 07:01
Endosulfan I ND 0.00065 0.0010 1 07/24/2015 07:01
Endosulfan II ND 0.00020 0.0010 1 07/24/2015 07:01
Endosulfan sulfate ND 0.00063 0.0010 1 07/24/2015 07:01 Endrin ND 0.00042 0.0010 1 07/24/2015 07:01
Endrin aldehyde ND 0.00020 0.0010 1 07/24/2015 07:01
Endrin ketone ND 0.00013 0.0010 1 07/24/2015 07:01
Heptachlor ND 0.00021 0.0010 1 07/24/2015 07:01
Heptachlor epoxide 0.013 0.0020 0.010 10 07/20/2015 14:15 Hexachlorobenzene ND 0.00027 0.010 1 07/24/2015 07:01
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/24/2015 07:01 Methoxychlor ND 0.00089 0.0010 1 07/24/2015 07:01
Toxaphene ND 0.035 0.050 1 07/24/2015 07:01
Aroclor1016 ND 0.0051 0.050 1 07/24/2015 07:01
Aroclor1221 ND 0.011 0.050 1 07/24/2015 07:01
Aroclor1232 ND 0.0063 0.050 1 07/24/2015 07:01
Aroclor1242 ND 0.0067 0.050 1 07/24/2015 07:01
Aroclor1248 ND 0.0040 0.050 1 07/24/2015 07:01
Aroclor1254 ND 0.0068 0.050 1 07/24/2015 07:01
Aroclor1260 ND 0.0061 0.050 1 07/24/2015 07:01
PCBs, total ND 0.0040 0.050 1 07/24/2015 07:01
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 122 70-130 07/20/2015 14:15
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 4 of 85 ends

485
CC 06-03-2025
485 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-10 (SURF) 1507427-019A Soil 07/09/2015 14:41 GC22 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/22/2015 00:09
a-BHC ND 0.00010 0.0010 1 07/22/2015 00:09
b-BHC ND 0.00025 0.0010 1 07/22/2015 00:09
d-BHC ND 0.00037 0.0010 1 07/22/2015 00:09
g-BHC ND 0.000097 0.0010 1 07/22/2015 00:09
Chlordane (Technical) 13 0.16 0.25 10 07/21/2015 23:01
a-Chlordane 1.5 0.0047 0.010 10 07/21/2015 23:01
g-Chlordane 1.5 0.0021 0.010 10 07/21/2015 23:01
p,p-DDD ND 0.00014 0.0010 1 07/22/2015 00:09
p,p-DDE 0.039 0.0032 0.010 10 07/21/2015 23:01
p,p-DDT 0.16 0.0043 0.010 10 07/21/2015 23:01
Dieldrin ND 0.00033 0.0010 1 07/22/2015 00:09
Endosulfan I ND 0.00065 0.0010 1 07/22/2015 00:09
Endosulfan II ND 0.00020 0.0010 1 07/22/2015 00:09
Endosulfan sulfate ND 0.00063 0.0010 1 07/22/2015 00:09 Endrin ND 0.00042 0.0010 1 07/22/2015 00:09
Endrin aldehyde ND 0.00020 0.0010 1 07/22/2015 00:09
Endrin ketone ND 0.00013 0.0010 1 07/22/2015 00:09
Heptachlor 0.021 0.0021 0.010 10 07/21/2015 23:01
Heptachlor epoxide 0.057 0.0020 0.010 10 07/21/2015 23:01 Hexachlorobenzene ND 0.00027 0.010 1 07/22/2015 00:09
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/22/2015 00:09 Methoxychlor ND 0.00089 0.0010 1 07/22/2015 00:09
Toxaphene ND 0.035 0.050 1 07/22/2015 00:09
Aroclor1016 ND 0.0051 0.050 1 07/22/2015 00:09
Aroclor1221 ND 0.011 0.050 1 07/22/2015 00:09
Aroclor1232 ND 0.0063 0.050 1 07/22/2015 00:09
Aroclor1242 ND 0.0067 0.050 1 07/22/2015 00:09
Aroclor1248 ND 0.0040 0.050 1 07/22/2015 00:09
Aroclor1254 ND 0.0068 0.050 1 07/22/2015 00:09
Aroclor1260 ND 0.0061 0.050 1 07/22/2015 00:09
PCBs, total ND 0.0040 0.050 1 07/22/2015 00:09
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 129 70-130 07/21/2015 23:01
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 5 of 85 ends

486
CC 06-03-2025
486 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-11 (SURF) 1507427-021A Soil 07/09/2015 15:06 GC22 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/20/2015 12:31
a-BHC ND 0.00010 0.0010 1 07/20/2015 12:31
b-BHC ND 0.00025 0.0010 1 07/20/2015 12:31
d-BHC ND 0.00037 0.0010 1 07/20/2015 12:31
g-BHC ND 0.000097 0.0010 1 07/20/2015 12:31
Chlordane (Technical) 0.93 0.16 0.25 10 07/21/2015 01:11 a-Chlordane 0.11 0.0047 0.010 10 07/21/2015 01:11
g-Chlordane 0.081 0.0021 0.010 10 07/21/2015 01:11
p,p-DDD ND 0.00014 0.0010 1 07/20/2015 12:31
p,p-DDE 0.035 0.0032 0.010 10 07/21/2015 01:11
p,p-DDT 0.093 0.0043 0.010 10 07/21/2015 01:11
Dieldrin ND 0.00033 0.0010 1 07/20/2015 12:31
Endosulfan I ND 0.00065 0.0010 1 07/20/2015 12:31
Endosulfan II ND 0.00020 0.0010 1 07/20/2015 12:31
Endosulfan sulfate ND 0.00063 0.0010 1 07/20/2015 12:31 Endrin ND 0.00042 0.0010 1 07/20/2015 12:31
Endrin aldehyde ND 0.00020 0.0010 1 07/20/2015 12:31
Endrin ketone ND 0.00013 0.0010 1 07/20/2015 12:31
Heptachlor ND 0.00021 0.0010 1 07/20/2015 12:31
Heptachlor epoxide 0.0040 0.00020 0.0010 1 07/20/2015 12:31 Hexachlorobenzene ND 0.00027 0.010 1 07/20/2015 12:31
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/20/2015 12:31 Methoxychlor ND 0.00089 0.0010 1 07/20/2015 12:31
Toxaphene ND 0.035 0.050 1 07/20/2015 12:31
Aroclor1016 ND 0.0051 0.050 1 07/20/2015 12:31
Aroclor1221 ND 0.011 0.050 1 07/20/2015 12:31
Aroclor1232 ND 0.0063 0.050 1 07/20/2015 12:31
Aroclor1242 ND 0.0067 0.050 1 07/20/2015 12:31
Aroclor1248 ND 0.0040 0.050 1 07/20/2015 12:31
Aroclor1254 ND 0.0068 0.050 1 07/20/2015 12:31
Aroclor1260 ND 0.0061 0.050 1 07/20/2015 12:31
PCBs, total ND 0.0040 0.050 1 07/20/2015 12:31
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 122 70-130 07/21/2015 01:11
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 6 of 85 ends

487
CC 06-03-2025
487 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-14 (SURF) 1507427-027A Soil 07/10/2015 08:28 GC23 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/18/2015 09:35
a-BHC ND 0.00010 0.0010 1 07/18/2015 09:35
b-BHC ND 0.00025 0.0010 1 07/18/2015 09:35
d-BHC ND 0.00037 0.0010 1 07/18/2015 09:35
g-BHC ND 0.000097 0.0010 1 07/18/2015 09:35
Chlordane (Technical) 0.060 0.016 0.025 1 07/18/2015 09:35 a-Chlordane 0.0067 0.00047 0.0010 1 07/18/2015 09:35
g-Chlordane 0.0040 0.00021 0.0010 1 07/18/2015 09:35
p,p-DDD 0.0022 0.00014 0.0010 1 07/18/2015 09:35
p,p-DDE 0.097 0.00032 0.0010 1 07/18/2015 09:35
p,p-DDT 0.061 0.00043 0.0010 1 07/18/2015 09:35
Dieldrin ND 0.00033 0.0010 1 07/18/2015 09:35
Endosulfan I ND 0.00065 0.0010 1 07/18/2015 09:35
Endosulfan II ND 0.00020 0.0010 1 07/18/2015 09:35
Endosulfan sulfate ND 0.00063 0.0010 1 07/18/2015 09:35 Endrin ND 0.00042 0.0010 1 07/18/2015 09:35
Endrin aldehyde ND 0.00020 0.0010 1 07/18/2015 09:35
Endrin ketone ND 0.00013 0.0010 1 07/18/2015 09:35
Heptachlor 0.00025 J 0.00021 0.0010 1 07/18/2015 09:35
Heptachlor epoxide 0.00071 J 0.00020 0.0010 1 07/18/2015 09:35 Hexachlorobenzene ND 0.00027 0.010 1 07/18/2015 09:35
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/18/2015 09:35 Methoxychlor ND 0.00089 0.0010 1 07/18/2015 09:35
Toxaphene ND 0.035 0.050 1 07/18/2015 09:35
Aroclor1016 ND 0.0051 0.050 1 07/18/2015 09:35
Aroclor1221 ND 0.011 0.050 1 07/18/2015 09:35
Aroclor1232 ND 0.0063 0.050 1 07/18/2015 09:35
Aroclor1242 ND 0.0067 0.050 1 07/18/2015 09:35
Aroclor1248 ND 0.0040 0.050 1 07/18/2015 09:35
Aroclor1254 ND 0.0068 0.050 1 07/18/2015 09:35
Aroclor1260 ND 0.0061 0.050 1 07/18/2015 09:35
PCBs, total ND 0.0040 0.050 1 07/18/2015 09:35
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 99 70-130 07/18/2015 09:35
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 7 of 85 ends

488
CC 06-03-2025
488 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A/8082
Unit: mg/kg
Organochlorine Pesticides (Basic Target List) + PCBs
P-15 (SURF) 1507427-029A Soil 07/10/2015 08:00 GC22 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/20/2015 21:47
a-BHC ND 0.00010 0.0010 1 07/20/2015 21:47
b-BHC ND 0.00025 0.0010 1 07/20/2015 21:47
d-BHC ND 0.00037 0.0010 1 07/20/2015 21:47
g-BHC 0.00049 J 0.000097 0.0010 1 07/20/2015 21:47
Chlordane (Technical) 1.5 0.16 0.25 10 07/21/2015 20:12 a-Chlordane 0.17 0.0047 0.010 10 07/21/2015 20:12
g-Chlordane 0.13 0.0021 0.010 10 07/21/2015 20:12
p,p-DDD ND 0.00014 0.0010 1 07/20/2015 21:47
p,p-DDE 0.41 0.0032 0.010 10 07/21/2015 20:12
p,p-DDT 0.16 0.0043 0.010 10 07/21/2015 20:12
Dieldrin 0.0068 0.00033 0.0010 1 07/20/2015 21:47
Endosulfan I ND 0.00065 0.0010 1 07/20/2015 21:47
Endosulfan II ND 0.00020 0.0010 1 07/20/2015 21:47
Endosulfan sulfate ND 0.00063 0.0010 1 07/20/2015 21:47 Endrin ND 0.00042 0.0010 1 07/20/2015 21:47
Endrin aldehyde ND 0.00020 0.0010 1 07/20/2015 21:47
Endrin ketone ND 0.00013 0.0010 1 07/20/2015 21:47
Heptachlor ND 0.00021 0.0010 1 07/20/2015 21:47
Heptachlor epoxide 0.011 0.0020 0.010 10 07/21/2015 20:12 Hexachlorobenzene ND 0.00027 0.010 1 07/20/2015 21:47
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/20/2015 21:47 Methoxychlor ND 0.00089 0.0010 1 07/20/2015 21:47
Toxaphene ND 0.035 0.050 1 07/20/2015 21:47
Aroclor1016 ND 0.0051 0.050 1 07/20/2015 21:47
Aroclor1221 ND 0.011 0.050 1 07/20/2015 21:47
Aroclor1232 ND 0.0063 0.050 1 07/20/2015 21:47
Aroclor1242 ND 0.0067 0.050 1 07/20/2015 21:47
Aroclor1248 ND 0.0040 0.050 1 07/20/2015 21:47
Aroclor1254 ND 0.0068 0.050 1 07/20/2015 21:47
Aroclor1260 ND 0.0061 0.050 1 07/20/2015 21:47
PCBs, total ND 0.0040 0.050 1 07/20/2015 21:47
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 75 70-130 07/21/2015 20:12
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager

Page 8 of 85 ends

489
CC 06-03-2025
489 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-1 (SURF) 1507427-001A Soil 07/09/2015 11:56 GC22 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/21/2015 21:19
a-BHC ND 0.0010 0.010 10 07/21/2015 21:19
b-BHC ND 0.0025 0.010 10 07/21/2015 21:19
d-BHC ND 0.0037 0.010 10 07/21/2015 21:19
g-BHC ND 0.00097 0.010 10 07/21/2015 21:19
Chlordane (Technical) 3.7 0.16 0.25 10 07/21/2015 21:19 a-Chlordane 0.42 0.0047 0.010 10 07/21/2015 21:19
g-Chlordane 0.23 0.0021 0.010 10 07/21/2015 21:19
p,p-DDD ND 0.0014 0.010 10 07/21/2015 21:19
p,p-DDE 0.35 0.0032 0.010 10 07/21/2015 21:19
p,p-DDT 0.26 0.0043 0.010 10 07/21/2015 21:19
Dieldrin ND 0.0033 0.010 10 07/21/2015 21:19
Endosulfan I ND 0.0065 0.010 10 07/21/2015 21:19
Endosulfan II ND 0.0020 0.010 10 07/21/2015 21:19
Endosulfan sulfate ND 0.0063 0.010 10 07/21/2015 21:19
Endrin ND 0.0097 0.010 10 07/21/2015 21:19
Endrin aldehyde ND 0.0020 0.010 10 07/21/2015 21:19
Endrin ketone ND 0.0013 0.010 10 07/21/2015 21:19
Heptachlor ND 0.0021 0.010 10 07/21/2015 21:19
Heptachlor epoxide 0.023 0.0020 0.010 10 07/21/2015 21:19 Hexachlorobenzene ND 0.0027 0.10 10 07/21/2015 21:19
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/21/2015 21:19 Methoxychlor ND 0.0089 0.010 10 07/21/2015 21:19
Toxaphene ND 0.35 0.50 10 07/21/2015 21:19
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 121 70-130 07/21/2015 21:19
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 9 of 85 ends

490
CC 06-03-2025
490 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-1 (SURF) DUP 1507427-001B Soil 07/09/2015 11:56 GC22 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0054 0.020 20 07/20/2015 16:34
a-BHC ND 0.0020 0.020 20 07/20/2015 16:34
b-BHC ND 0.0050 0.020 20 07/20/2015 16:34
d-BHC ND 0.0074 0.020 20 07/20/2015 16:34
g-BHC ND 0.0019 0.020 20 07/20/2015 16:34
Chlordane (Technical) 2.8 0.32 0.50 20 07/20/2015 16:34 a-Chlordane 0.34 0.0094 0.020 20 07/20/2015 16:34
g-Chlordane 0.19 0.0042 0.020 20 07/20/2015 16:34
p,p-DDD ND 0.0028 0.020 20 07/20/2015 16:34
p,p-DDE 0.29 0.0064 0.020 20 07/20/2015 16:34
p,p-DDT 0.21 0.0086 0.020 20 07/20/2015 16:34
Dieldrin ND 0.0066 0.020 20 07/20/2015 16:34
Endosulfan I ND 0.013 0.020 20 07/20/2015 16:34
Endosulfan II ND 0.0040 0.020 20 07/20/2015 16:34
Endosulfan sulfate ND 0.013 0.020 20 07/20/2015 16:34
Endrin ND 0.0084 0.020 20 07/20/2015 16:34
Endrin aldehyde ND 0.0040 0.020 20 07/20/2015 16:34
Endrin ketone ND 0.0026 0.020 20 07/20/2015 16:34
Heptachlor ND 0.0042 0.020 20 07/20/2015 16:34
Heptachlor epoxide 0.031 0.0040 0.020 20 07/20/2015 16:34 Hexachlorobenzene ND 0.0054 0.20 20 07/20/2015 16:34
Hexachlorocyclopentadiene ND 0.0080 0.40 20 07/20/2015 16:34 Methoxychlor ND 0.018 0.020 20 07/20/2015 16:34
Toxaphene ND 0.70 1.0 20 07/20/2015 16:34
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 126 70-130 07/20/2015 16:34
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 10 of 85 ends

491
CC 06-03-2025
491 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-1 (1-1.5') 1507427-002A Soil 07/09/2015 11:59 GC22 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/21/2015 14:28
a-BHC ND 0.00010 0.0010 1 07/21/2015 14:28
b-BHC ND 0.00025 0.0010 1 07/21/2015 14:28
d-BHC ND 0.00037 0.0010 1 07/21/2015 14:28
g-BHC ND 0.000097 0.0010 1 07/21/2015 14:28
Chlordane (Technical) 0.087 0.016 0.025 1 07/21/2015 14:28 a-Chlordane 0.0094 0.00047 0.0010 1 07/21/2015 14:28
g-Chlordane 0.0053 0.00021 0.0010 1 07/21/2015 14:28
p,p-DDD ND 0.00014 0.0010 1 07/21/2015 14:28
p,p-DDE 0.0095 0.00032 0.0010 1 07/21/2015 14:28
p,p-DDT 0.0059 0.00043 0.0010 1 07/21/2015 14:28
Dieldrin ND 0.00033 0.0010 1 07/21/2015 14:28
Endosulfan I ND 0.00065 0.0010 1 07/21/2015 14:28
Endosulfan II ND 0.00020 0.0010 1 07/21/2015 14:28
Endosulfan sulfate ND 0.00063 0.0010 1 07/21/2015 14:28 Endrin ND 0.00042 0.0010 1 07/21/2015 14:28
Endrin aldehyde ND 0.00020 0.0010 1 07/21/2015 14:28
Endrin ketone ND 0.00013 0.0010 1 07/21/2015 14:28
Heptachlor ND 0.00021 0.0010 1 07/21/2015 14:28
Heptachlor epoxide 0.00086 J 0.00020 0.0010 1 07/21/2015 14:28 Hexachlorobenzene ND 0.00027 0.010 1 07/21/2015 14:28
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/21/2015 14:28 Methoxychlor ND 0.00089 0.0010 1 07/21/2015 14:28
Toxaphene ND 0.035 0.050 1 07/21/2015 14:28
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 94 70-130 07/21/2015 14:28
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 11 of 85 ends

492
CC 06-03-2025
492 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-2 (SURF) 1507427-003A Soil 07/09/2015 12:20 GC22 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/21/2015 15:03
a-BHC ND 0.00010 0.0010 1 07/21/2015 15:03
b-BHC ND 0.00025 0.0010 1 07/21/2015 15:03
d-BHC ND 0.00037 0.0010 1 07/21/2015 15:03
g-BHC ND 0.000097 0.0010 1 07/21/2015 15:03
Chlordane (Technical) 0.12 0.016 0.025 1 07/21/2015 15:03 a-Chlordane 0.018 0.00047 0.0010 1 07/21/2015 15:03
g-Chlordane 0.0058 0.00021 0.0010 1 07/21/2015 15:03
p,p-DDD ND 0.00014 0.0010 1 07/21/2015 15:03
p,p-DDE 0.077 0.00032 0.0010 1 07/21/2015 15:03
p,p-DDT 0.044 0.00043 0.0010 1 07/21/2015 15:03
Dieldrin ND 0.00033 0.0010 1 07/21/2015 15:03
Endosulfan I ND 0.00065 0.0010 1 07/21/2015 15:03
Endosulfan II ND 0.00020 0.0010 1 07/21/2015 15:03
Endosulfan sulfate ND 0.00063 0.0010 1 07/21/2015 15:03 Endrin ND 0.00042 0.0010 1 07/21/2015 15:03
Endrin aldehyde ND 0.00020 0.0010 1 07/21/2015 15:03
Endrin ketone ND 0.00013 0.0010 1 07/21/2015 15:03
Heptachlor ND 0.00021 0.0010 1 07/21/2015 15:03
Heptachlor epoxide 0.0048 0.00020 0.0010 1 07/21/2015 15:03 Hexachlorobenzene ND 0.00027 0.010 1 07/21/2015 15:03
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/21/2015 15:03 Methoxychlor ND 0.00089 0.0010 1 07/21/2015 15:03
Toxaphene ND 0.035 0.050 1 07/21/2015 15:03
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 100 70-130 07/21/2015 15:03
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 12 of 85 ends

493
CC 06-03-2025
493 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-2 (1-1.5') 1507427-004A Soil 07/09/2015 12:25 GC22 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/21/2015 16:12
a-BHC ND 0.00010 0.0010 1 07/21/2015 16:12
b-BHC ND 0.00025 0.0010 1 07/21/2015 16:12
d-BHC ND 0.00037 0.0010 1 07/21/2015 16:12
g-BHC ND 0.000097 0.0010 1 07/21/2015 16:12
Chlordane (Technical) ND 0.016 0.025 1 07/21/2015 16:12 a-Chlordane ND 0.00047 0.0010 1 07/21/2015 16:12
g-Chlordane ND 0.00021 0.0010 1 07/21/2015 16:12
p,p-DDD ND 0.00014 0.0010 1 07/21/2015 16:12
p,p-DDE 0.00046 J 0.00032 0.0010 1 07/21/2015 16:12
p,p-DDT ND 0.00043 0.0010 1 07/21/2015 16:12
Dieldrin ND 0.00033 0.0010 1 07/21/2015 16:12
Endosulfan I ND 0.00065 0.0010 1 07/21/2015 16:12
Endosulfan II ND 0.00020 0.0010 1 07/21/2015 16:12
Endosulfan sulfate ND 0.00063 0.0010 1 07/21/2015 16:12 Endrin ND 0.00097 0.0010 1 07/21/2015 16:12
Endrin aldehyde ND 0.00020 0.0010 1 07/21/2015 16:12
Endrin ketone ND 0.00013 0.0010 1 07/21/2015 16:12
Heptachlor ND 0.00021 0.0010 1 07/21/2015 16:12
Heptachlor epoxide ND 0.00020 0.0010 1 07/21/2015 16:12 Hexachlorobenzene ND 0.00027 0.010 1 07/21/2015 16:12
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/21/2015 16:12 Methoxychlor ND 0.00089 0.0010 1 07/21/2015 16:12
Toxaphene ND 0.035 0.050 1 07/21/2015 16:12
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 98 70-130 07/21/2015 16:12
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 13 of 85 ends

494
CC 06-03-2025
494 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-3 (SURF) 1507427-005A Soil 07/09/2015 12:26 GC22 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/21/2015 22:28
a-BHC ND 0.0010 0.010 10 07/21/2015 22:28
b-BHC ND 0.0025 0.010 10 07/21/2015 22:28
d-BHC ND 0.0037 0.010 10 07/21/2015 22:28
g-BHC ND 0.00097 0.010 10 07/21/2015 22:28
Chlordane (Technical) 1.2 0.16 0.25 10 07/21/2015 22:28 a-Chlordane 0.13 0.0047 0.010 10 07/21/2015 22:28
g-Chlordane 0.092 0.0021 0.010 10 07/21/2015 22:28
p,p-DDD ND 0.0014 0.010 10 07/21/2015 22:28
p,p-DDE 0.056 0.0032 0.010 10 07/21/2015 22:28
p,p-DDT 0.046 0.0043 0.010 10 07/21/2015 22:28
Dieldrin ND 0.0033 0.010 10 07/21/2015 22:28
Endosulfan I ND 0.0065 0.010 10 07/21/2015 22:28
Endosulfan II ND 0.0020 0.010 10 07/21/2015 22:28
Endosulfan sulfate ND 0.0063 0.010 10 07/21/2015 22:28
Endrin ND 0.0097 0.010 10 07/21/2015 22:28
Endrin aldehyde ND 0.0020 0.010 10 07/21/2015 22:28
Endrin ketone ND 0.0013 0.010 10 07/21/2015 22:28
Heptachlor ND 0.0021 0.010 10 07/21/2015 22:28
Heptachlor epoxide 0.0040 J 0.0020 0.010 10 07/21/2015 22:28 Hexachlorobenzene ND 0.0027 0.10 10 07/21/2015 22:28
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/21/2015 22:28 Methoxychlor ND 0.0089 0.010 10 07/21/2015 22:28
Toxaphene ND 0.35 0.50 10 07/21/2015 22:28
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 103 70-130 07/21/2015 22:28
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 14 of 85 ends

495
CC 06-03-2025
495 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-3 (1-1.5') 1507427-006A Soil 07/09/2015 12:30 GC40 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/16/2015 00:20
a-BHC ND 0.00010 0.0010 1 07/16/2015 00:20
b-BHC ND 0.00025 0.0010 1 07/16/2015 00:20
d-BHC ND 0.00037 0.0010 1 07/16/2015 00:20
g-BHC ND 0.000097 0.0010 1 07/16/2015 00:20
Chlordane (Technical) 0.22 0.016 0.025 1 07/16/2015 00:20 a-Chlordane 0.020 0.00047 0.0010 1 07/16/2015 00:20
g-Chlordane 0.020 0.00021 0.0010 1 07/16/2015 00:20
p,p-DDD ND 0.00014 0.0010 1 07/16/2015 00:20
p,p-DDE 0.0065 0.00032 0.0010 1 07/16/2015 00:20
p,p-DDT 0.0082 0.00043 0.0010 1 07/16/2015 00:20
Dieldrin ND 0.00033 0.0010 1 07/16/2015 00:20
Endosulfan I ND 0.00065 0.0010 1 07/16/2015 00:20
Endosulfan II ND 0.00020 0.0010 1 07/16/2015 00:20
Endosulfan sulfate ND 0.00063 0.0010 1 07/16/2015 00:20 Endrin ND 0.00042 0.0010 1 07/16/2015 00:20
Endrin aldehyde ND 0.00020 0.0010 1 07/16/2015 00:20
Endrin ketone ND 0.00013 0.0010 1 07/16/2015 00:20
Heptachlor ND 0.00021 0.0010 1 07/16/2015 00:20
Heptachlor epoxide ND 0.00020 0.0010 1 07/16/2015 00:20 Hexachlorobenzene ND 0.00027 0.010 1 07/16/2015 00:20
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/16/2015 00:20 Methoxychlor ND 0.00089 0.0010 1 07/16/2015 00:20
Toxaphene ND 0.035 0.050 1 07/16/2015 00:20
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 83 70-130 07/16/2015 00:20
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 15 of 85 ends

496
CC 06-03-2025
496 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-4 (1-1.5') 1507427-008A Soil 07/09/2015 13:02 GC22 107728 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/20/2015 17:09
a-BHC ND 0.0010 0.010 10 07/20/2015 17:09
b-BHC ND 0.0025 0.010 10 07/20/2015 17:09
d-BHC ND 0.0037 0.010 10 07/20/2015 17:09
g-BHC ND 0.00097 0.010 10 07/20/2015 17:09
Chlordane (Technical) 1.1 0.16 0.25 10 07/20/2015 17:09 a-Chlordane 0.13 0.0047 0.010 10 07/20/2015 17:09
g-Chlordane 0.079 0.0021 0.010 10 07/20/2015 17:09
p,p-DDD ND 0.0014 0.010 10 07/20/2015 17:09
p,p-DDE 0.044 0.0032 0.010 10 07/20/2015 17:09
p,p-DDT 0.038 0.0043 0.010 10 07/20/2015 17:09
Dieldrin ND 0.0033 0.010 10 07/20/2015 17:09
Endosulfan I ND 0.0065 0.010 10 07/20/2015 17:09
Endosulfan II ND 0.0020 0.010 10 07/20/2015 17:09
Endosulfan sulfate ND 0.0063 0.010 10 07/20/2015 17:09
Endrin ND 0.0042 0.010 10 07/20/2015 17:09
Endrin aldehyde ND 0.0020 0.010 10 07/20/2015 17:09
Endrin ketone ND 0.0013 0.010 10 07/20/2015 17:09
Heptachlor ND 0.0021 0.010 10 07/20/2015 17:09
Heptachlor epoxide 0.0078 J 0.0020 0.010 10 07/20/2015 17:09 Hexachlorobenzene ND 0.0027 0.10 10 07/20/2015 17:09
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/20/2015 17:09 Methoxychlor ND 0.0089 0.010 10 07/20/2015 17:09
Toxaphene ND 0.35 0.50 10 07/20/2015 17:09
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 129 70-130 07/20/2015 17:09
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 16 of 85 ends

497
CC 06-03-2025
497 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-5 (SURF) 1507427-009A Soil 07/09/2015 13:14 GC23 107728 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/18/2015 07:43
a-BHC ND 0.00010 0.0010 1 07/18/2015 07:43
b-BHC ND 0.00025 0.0010 1 07/18/2015 07:43
d-BHC ND 0.00037 0.0010 1 07/18/2015 07:43
g-BHC ND 0.000097 0.0010 1 07/18/2015 07:43
Chlordane (Technical) 0.063 0.016 0.025 1 07/18/2015 07:43 a-Chlordane 0.0055 0.00047 0.0010 1 07/18/2015 07:43
g-Chlordane 0.0023 0.00021 0.0010 1 07/18/2015 07:43
p,p-DDD 0.00076 J 0.00014 0.0010 1 07/18/2015 07:43
p,p-DDE 0.024 0.00032 0.0010 1 07/18/2015 07:43
p,p-DDT 0.024 0.00043 0.0010 1 07/18/2015 07:43
Dieldrin ND 0.00033 0.0010 1 07/18/2015 07:43
Endosulfan I ND 0.00065 0.0010 1 07/18/2015 07:43
Endosulfan II ND 0.00020 0.0010 1 07/18/2015 07:43
Endosulfan sulfate ND 0.00063 0.0010 1 07/18/2015 07:43 Endrin ND 0.00042 0.0010 1 07/18/2015 07:43
Endrin aldehyde ND 0.00020 0.0010 1 07/18/2015 07:43
Endrin ketone ND 0.00013 0.0010 1 07/18/2015 07:43
Heptachlor ND 0.00021 0.0010 1 07/18/2015 07:43
Heptachlor epoxide 0.0016 0.00020 0.0010 1 07/18/2015 07:43 Hexachlorobenzene ND 0.00027 0.010 1 07/18/2015 07:43
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/18/2015 07:43 Methoxychlor ND 0.00089 0.0010 1 07/18/2015 07:43
Toxaphene ND 0.035 0.050 1 07/18/2015 07:43
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 98 70-130 07/18/2015 07:43
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 17 of 85 ends

498
CC 06-03-2025
498 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-5 (1-1.5') 1507427-010A Soil 07/09/2015 13:20 GC40 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/16/2015 04:29
a-BHC ND 0.00010 0.0010 1 07/16/2015 04:29
b-BHC ND 0.00025 0.0010 1 07/16/2015 04:29
d-BHC ND 0.00037 0.0010 1 07/16/2015 04:29
g-BHC ND 0.000097 0.0010 1 07/16/2015 04:29
Chlordane (Technical) ND 0.016 0.025 1 07/16/2015 04:29 a-Chlordane 0.0014 0.00047 0.0010 1 07/16/2015 04:29
g-Chlordane 0.00054 J 0.00021 0.0010 1 07/16/2015 04:29 p,p-DDD ND 0.00014 0.0010 1 07/16/2015 04:29
p,p-DDE 0.00093 J 0.00032 0.0010 1 07/16/2015 04:29
p,p-DDT 0.0011 0.00043 0.0010 1 07/16/2015 04:29
Dieldrin ND 0.00033 0.0010 1 07/16/2015 04:29
Endosulfan I ND 0.00065 0.0010 1 07/16/2015 04:29
Endosulfan II ND 0.00020 0.0010 1 07/16/2015 04:29
Endosulfan sulfate ND 0.00063 0.0010 1 07/16/2015 04:29 Endrin ND 0.00042 0.0010 1 07/16/2015 04:29
Endrin aldehyde ND 0.00020 0.0010 1 07/16/2015 04:29
Endrin ketone ND 0.00013 0.0010 1 07/16/2015 04:29
Heptachlor ND 0.00021 0.0010 1 07/16/2015 04:29
Heptachlor epoxide ND 0.00020 0.0010 1 07/16/2015 04:29 Hexachlorobenzene ND 0.00027 0.010 1 07/16/2015 04:29
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/16/2015 04:29 Methoxychlor ND 0.00089 0.0010 1 07/16/2015 04:29
Toxaphene ND 0.035 0.050 1 07/16/2015 04:29
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 98 70-130 07/16/2015 04:29
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 18 of 85 ends

499
CC 06-03-2025
499 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-6 (SURF) 1507427-011A Soil 07/09/2015 13:33 GC22 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/20/2015 15:25
a-BHC ND 0.0010 0.010 10 07/20/2015 15:25
b-BHC ND 0.0025 0.010 10 07/20/2015 15:25
d-BHC ND 0.0037 0.010 10 07/20/2015 15:25
g-BHC ND 0.00097 0.010 10 07/20/2015 15:25
Chlordane (Technical) 3.4 0.16 0.25 10 07/20/2015 15:25 a-Chlordane 0.39 0.0047 0.010 10 07/20/2015 15:25
g-Chlordane 0.28 0.0021 0.010 10 07/20/2015 15:25
p,p-DDD ND 0.0014 0.010 10 07/20/2015 15:25
p,p-DDE 0.12 0.0032 0.010 10 07/20/2015 15:25
p,p-DDT 0.21 0.0043 0.010 10 07/20/2015 15:25
Dieldrin ND 0.0033 0.010 10 07/20/2015 15:25
Endosulfan I ND 0.0065 0.010 10 07/20/2015 15:25
Endosulfan II ND 0.0020 0.010 10 07/20/2015 15:25
Endosulfan sulfate ND 0.0063 0.010 10 07/20/2015 15:25
Endrin ND 0.0042 0.010 10 07/20/2015 15:25
Endrin aldehyde ND 0.0020 0.010 10 07/20/2015 15:25
Endrin ketone ND 0.0013 0.010 10 07/20/2015 15:25
Heptachlor ND 0.0021 0.010 10 07/20/2015 15:25
Heptachlor epoxide 0.0060 J 0.0020 0.010 10 07/20/2015 15:25 Hexachlorobenzene ND 0.0027 0.10 10 07/20/2015 15:25
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/20/2015 15:25 Methoxychlor ND 0.0089 0.010 10 07/20/2015 15:25
Toxaphene ND 0.35 0.50 10 07/20/2015 15:25
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 130 70-130 07/20/2015 15:25
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 19 of 85 ends

500
CC 06-03-2025
500 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-6 (1-1.5') 1507427-012A Soil 07/09/2015 13:37 GC23 107728 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/18/2015 07:06
a-BHC ND 0.00010 0.0010 1 07/18/2015 07:06
b-BHC ND 0.00025 0.0010 1 07/18/2015 07:06
d-BHC ND 0.00037 0.0010 1 07/18/2015 07:06
g-BHC ND 0.000097 0.0010 1 07/18/2015 07:06
Chlordane (Technical) ND 0.016 0.025 1 07/18/2015 07:06 a-Chlordane 0.00094 J 0.00047 0.0010 1 07/18/2015 07:06 g-Chlordane 0.00073 J 0.00021 0.0010 1 07/18/2015 07:06 p,p-DDD ND 0.00014 0.0010 1 07/18/2015 07:06
p,p-DDE ND 0.00032 0.0010 1 07/18/2015 07:06
p,p-DDT ND 0.00043 0.0010 1 07/18/2015 07:06
Dieldrin ND 0.00033 0.0010 1 07/18/2015 07:06
Endosulfan I ND 0.00065 0.0010 1 07/18/2015 07:06
Endosulfan II ND 0.00020 0.0010 1 07/18/2015 07:06
Endosulfan sulfate ND 0.00063 0.0010 1 07/18/2015 07:06 Endrin ND 0.00042 0.0010 1 07/18/2015 07:06
Endrin aldehyde ND 0.00020 0.0010 1 07/18/2015 07:06
Endrin ketone ND 0.00013 0.0010 1 07/18/2015 07:06
Heptachlor ND 0.00021 0.0010 1 07/18/2015 07:06
Heptachlor epoxide ND 0.00020 0.0010 1 07/18/2015 07:06 Hexachlorobenzene ND 0.00027 0.010 1 07/18/2015 07:06
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/18/2015 07:06 Methoxychlor ND 0.00089 0.0010 1 07/18/2015 07:06
Toxaphene ND 0.035 0.050 1 07/18/2015 07:06
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 102 70-130 07/18/2015 07:06
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 20 of 85 ends

501
CC 06-03-2025
501 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-7 (SURF) 1507427-013A Soil 07/09/2015 13:52 GC22 107573 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/20/2015 16:00
a-BHC ND 0.0010 0.010 10 07/20/2015 16:00
b-BHC ND 0.0025 0.010 10 07/20/2015 16:00
d-BHC ND 0.0037 0.010 10 07/20/2015 16:00
g-BHC ND 0.00097 0.010 10 07/20/2015 16:00
Chlordane (Technical) 1.9 0.16 0.25 10 07/20/2015 16:00 a-Chlordane 0.25 0.0047 0.010 10 07/20/2015 16:00
g-Chlordane 0.15 0.0021 0.010 10 07/20/2015 16:00
p,p-DDD ND 0.0014 0.010 10 07/20/2015 16:00
p,p-DDE 0.12 0.0032 0.010 10 07/20/2015 16:00
p,p-DDT 0.11 0.0043 0.010 10 07/20/2015 16:00
Dieldrin ND 0.0033 0.010 10 07/20/2015 16:00
Endosulfan I ND 0.0065 0.010 10 07/20/2015 16:00
Endosulfan II ND 0.0020 0.010 10 07/20/2015 16:00
Endosulfan sulfate ND 0.0063 0.010 10 07/20/2015 16:00
Endrin ND 0.0042 0.010 10 07/20/2015 16:00
Endrin aldehyde ND 0.0020 0.010 10 07/20/2015 16:00
Endrin ketone ND 0.0013 0.010 10 07/20/2015 16:00
Heptachlor ND 0.0021 0.010 10 07/20/2015 16:00
Heptachlor epoxide 0.026 0.0020 0.010 10 07/20/2015 16:00 Hexachlorobenzene ND 0.0027 0.10 10 07/20/2015 16:00
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/20/2015 16:00 Methoxychlor ND 0.0089 0.010 10 07/20/2015 16:00
Toxaphene ND 0.35 0.50 10 07/20/2015 16:00
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 122 70-130 07/20/2015 16:00
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 21 of 85 ends

502
CC 06-03-2025
502 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-7 (1-1.5') 1507427-014A Soil 07/09/2015 13:55 GC40 107573 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/16/2015 06:50
a-BHC ND 0.00010 0.0010 1 07/16/2015 06:50
b-BHC ND 0.00025 0.0010 1 07/16/2015 06:50
d-BHC ND 0.00037 0.0010 1 07/16/2015 06:50
g-BHC ND 0.000097 0.0010 1 07/16/2015 06:50
Chlordane (Technical) ND 0.016 0.025 1 07/16/2015 06:50 a-Chlordane 0.0014 0.00047 0.0010 1 07/16/2015 06:50
g-Chlordane 0.00054 J 0.00021 0.0010 1 07/16/2015 06:50 p,p-DDD ND 0.00014 0.0010 1 07/16/2015 06:50
p,p-DDE 0.0014 0.00032 0.0010 1 07/16/2015 06:50
p,p-DDT 0.0011 0.00043 0.0010 1 07/16/2015 06:50
Dieldrin ND 0.00033 0.0010 1 07/16/2015 06:50
Endosulfan I ND 0.00065 0.0010 1 07/16/2015 06:50
Endosulfan II ND 0.00020 0.0010 1 07/16/2015 06:50
Endosulfan sulfate ND 0.00063 0.0010 1 07/16/2015 06:50 Endrin ND 0.00042 0.0010 1 07/16/2015 06:50
Endrin aldehyde ND 0.00020 0.0010 1 07/16/2015 06:50
Endrin ketone ND 0.00013 0.0010 1 07/16/2015 06:50
Heptachlor ND 0.00021 0.0010 1 07/16/2015 06:50
Heptachlor epoxide ND 0.00020 0.0010 1 07/16/2015 06:50 Hexachlorobenzene ND 0.00027 0.010 1 07/16/2015 06:50
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/16/2015 06:50 Methoxychlor ND 0.00089 0.0010 1 07/16/2015 06:50
Toxaphene ND 0.035 0.050 1 07/16/2015 06:50
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 81 70-130 07/16/2015 06:50
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 22 of 85 ends

503
CC 06-03-2025
503 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-8 (SURF) 1507427-015A Soil 07/09/2015 14:07 GC40 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/15/2015 23:45
a-BHC ND 0.00010 0.0010 1 07/15/2015 23:45
b-BHC ND 0.00025 0.0010 1 07/15/2015 23:45
d-BHC ND 0.00037 0.0010 1 07/15/2015 23:45
g-BHC ND 0.000097 0.0010 1 07/15/2015 23:45
Chlordane (Technical) 0.057 0.016 0.025 1 07/15/2015 23:45 a-Chlordane 0.010 0.00047 0.0010 1 07/15/2015 23:45
g-Chlordane 0.0045 0.00021 0.0010 1 07/15/2015 23:45
p,p-DDD ND 0.00014 0.0010 1 07/15/2015 23:45
p,p-DDE 0.014 0.00032 0.0010 1 07/15/2015 23:45
p,p-DDT 0.011 0.00043 0.0010 1 07/15/2015 23:45
Dieldrin ND 0.00033 0.0010 1 07/15/2015 23:45
Endosulfan I ND 0.00065 0.0010 1 07/15/2015 23:45
Endosulfan II ND 0.00020 0.0010 1 07/15/2015 23:45
Endosulfan sulfate ND 0.00063 0.0010 1 07/15/2015 23:45 Endrin ND 0.00042 0.0010 1 07/15/2015 23:45
Endrin aldehyde ND 0.00020 0.0010 1 07/15/2015 23:45
Endrin ketone ND 0.00013 0.0010 1 07/15/2015 23:45
Heptachlor ND 0.00021 0.0010 1 07/15/2015 23:45
Heptachlor epoxide 0.0033 0.00020 0.0010 1 07/15/2015 23:45 Hexachlorobenzene ND 0.00027 0.010 1 07/15/2015 23:45
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/15/2015 23:45 Methoxychlor ND 0.00089 0.0010 1 07/15/2015 23:45
Toxaphene ND 0.035 0.050 1 07/15/2015 23:45
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 78 70-130 07/15/2015 23:45
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 23 of 85 ends

504
CC 06-03-2025
504 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-8 (1-1.5') 1507427-016A Soil 07/09/2015 14:09 GC40 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/16/2015 07:26
a-BHC ND 0.00010 0.0010 1 07/16/2015 07:26
b-BHC ND 0.00025 0.0010 1 07/16/2015 07:26
d-BHC ND 0.00037 0.0010 1 07/16/2015 07:26
g-BHC ND 0.000097 0.0010 1 07/16/2015 07:26
Chlordane (Technical) ND 0.016 0.025 1 07/16/2015 07:26 a-Chlordane ND 0.00047 0.0010 1 07/16/2015 07:26
g-Chlordane 0.00027 J 0.00021 0.0010 1 07/16/2015 07:26 p,p-DDD 0.0011 0.00014 0.0010 1 07/16/2015 07:26
p,p-DDE 0.0039 0.00032 0.0010 1 07/16/2015 07:26
p,p-DDT 0.0034 0.00043 0.0010 1 07/16/2015 07:26
Dieldrin ND 0.00033 0.0010 1 07/16/2015 07:26
Endosulfan I ND 0.00065 0.0010 1 07/16/2015 07:26
Endosulfan II ND 0.00020 0.0010 1 07/16/2015 07:26
Endosulfan sulfate ND 0.00063 0.0010 1 07/16/2015 07:26 Endrin ND 0.00042 0.0010 1 07/16/2015 07:26
Endrin aldehyde ND 0.00020 0.0010 1 07/16/2015 07:26
Endrin ketone ND 0.00013 0.0010 1 07/16/2015 07:26
Heptachlor ND 0.00021 0.0010 1 07/16/2015 07:26
Heptachlor epoxide ND 0.00020 0.0010 1 07/16/2015 07:26 Hexachlorobenzene ND 0.00027 0.010 1 07/16/2015 07:26
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/16/2015 07:26 Methoxychlor ND 0.00089 0.0010 1 07/16/2015 07:26
Toxaphene ND 0.035 0.050 1 07/16/2015 07:26
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 70 70-130 07/16/2015 07:26
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 24 of 85 ends

505
CC 06-03-2025
505 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-9 (SURF) DUP 1507427-017B Soil 07/09/2015 14:20 GC22 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.0027 0.010 10 07/21/2015 00:37
a-BHC ND 0.0010 0.010 10 07/21/2015 00:37
b-BHC ND 0.0025 0.010 10 07/21/2015 00:37
d-BHC ND 0.0037 0.010 10 07/21/2015 00:37
g-BHC ND 0.00097 0.010 10 07/21/2015 00:37
Chlordane (Technical) 1.8 0.16 0.25 10 07/21/2015 00:37 a-Chlordane 0.21 0.0047 0.010 10 07/21/2015 00:37
g-Chlordane 0.15 0.0021 0.010 10 07/21/2015 00:37
p,p-DDD ND 0.0014 0.010 10 07/21/2015 00:37
p,p-DDE 0.047 0.0032 0.010 10 07/21/2015 00:37
p,p-DDT 0.12 0.0043 0.010 10 07/21/2015 00:37
Dieldrin ND 0.0033 0.010 10 07/21/2015 00:37
Endosulfan I ND 0.0065 0.010 10 07/21/2015 00:37
Endosulfan II ND 0.0020 0.010 10 07/21/2015 00:37
Endosulfan sulfate ND 0.0063 0.010 10 07/21/2015 00:37
Endrin ND 0.0042 0.010 10 07/21/2015 00:37
Endrin aldehyde ND 0.0020 0.010 10 07/21/2015 00:37
Endrin ketone ND 0.0013 0.010 10 07/21/2015 00:37
Heptachlor ND 0.0021 0.010 10 07/21/2015 00:37
Heptachlor epoxide 0.0083 J 0.0020 0.010 10 07/21/2015 00:37 Hexachlorobenzene ND 0.0027 0.10 10 07/21/2015 00:37
Hexachlorocyclopentadiene ND 0.0040 0.20 10 07/21/2015 00:37 Methoxychlor ND 0.0089 0.010 10 07/21/2015 00:37
Toxaphene ND 0.35 0.50 10 07/21/2015 00:37
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 103 70-130 07/21/2015 00:37
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 25 of 85 ends

506
CC 06-03-2025
506 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-9 (1-1.5') 1507427-018A Soil 07/09/2015 14:24 GC23 107728 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/18/2015 06:28
a-BHC ND 0.00010 0.0010 1 07/18/2015 06:28
b-BHC ND 0.00025 0.0010 1 07/18/2015 06:28
d-BHC ND 0.00037 0.0010 1 07/18/2015 06:28
g-BHC ND 0.000097 0.0010 1 07/18/2015 06:28
Chlordane (Technical) 0.038 0.016 0.025 1 07/18/2015 06:28 a-Chlordane 0.0032 0.00047 0.0010 1 07/18/2015 06:28
g-Chlordane 0.0024 0.00021 0.0010 1 07/18/2015 06:28
p,p-DDD 0.00035 J 0.00014 0.0010 1 07/18/2015 06:28
p,p-DDE 0.0039 0.00032 0.0010 1 07/18/2015 06:28
p,p-DDT 0.012 0.00043 0.0010 1 07/18/2015 06:28
Dieldrin ND 0.00033 0.0010 1 07/18/2015 06:28
Endosulfan I ND 0.00065 0.0010 1 07/18/2015 06:28
Endosulfan II ND 0.00020 0.0010 1 07/18/2015 06:28
Endosulfan sulfate ND 0.00063 0.0010 1 07/18/2015 06:28 Endrin ND 0.00042 0.0010 1 07/18/2015 06:28
Endrin aldehyde ND 0.00020 0.0010 1 07/18/2015 06:28
Endrin ketone ND 0.00013 0.0010 1 07/18/2015 06:28
Heptachlor ND 0.00021 0.0010 1 07/18/2015 06:28
Heptachlor epoxide ND 0.00020 0.0010 1 07/18/2015 06:28 Hexachlorobenzene ND 0.00027 0.010 1 07/18/2015 06:28
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/18/2015 06:28 Methoxychlor ND 0.00089 0.0010 1 07/18/2015 06:28
Toxaphene ND 0.035 0.050 1 07/18/2015 06:28
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 93 70-130 07/18/2015 06:28
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 26 of 85 ends

507
CC 06-03-2025
507 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-10 (1-1.5') 1507427-020A Soil 07/09/2015 14:45 GC40 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/16/2015 09:48
a-BHC ND 0.00010 0.0010 1 07/16/2015 09:48
b-BHC ND 0.00025 0.0010 1 07/16/2015 09:48
d-BHC ND 0.00037 0.0010 1 07/16/2015 09:48
g-BHC ND 0.000097 0.0010 1 07/16/2015 09:48
Chlordane (Technical) 0.040 0.016 0.025 1 07/16/2015 09:48 a-Chlordane 0.0051 0.00047 0.0010 1 07/16/2015 09:48
g-Chlordane 0.0052 0.00021 0.0010 1 07/16/2015 09:48
p,p-DDD ND 0.00014 0.0010 1 07/16/2015 09:48
p,p-DDE 0.0014 0.00032 0.0010 1 07/16/2015 09:48
p,p-DDT 0.0040 0.00043 0.0010 1 07/16/2015 09:48
Dieldrin ND 0.00033 0.0010 1 07/16/2015 09:48
Endosulfan I ND 0.00065 0.0010 1 07/16/2015 09:48
Endosulfan II ND 0.00020 0.0010 1 07/16/2015 09:48
Endosulfan sulfate ND 0.00063 0.0010 1 07/16/2015 09:48 Endrin ND 0.00042 0.0010 1 07/16/2015 09:48
Endrin aldehyde ND 0.00020 0.0010 1 07/16/2015 09:48
Endrin ketone ND 0.00013 0.0010 1 07/16/2015 09:48
Heptachlor ND 0.00021 0.0010 1 07/16/2015 09:48
Heptachlor epoxide ND 0.00020 0.0010 1 07/16/2015 09:48 Hexachlorobenzene ND 0.00027 0.010 1 07/16/2015 09:48
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/16/2015 09:48 Methoxychlor ND 0.00089 0.0010 1 07/16/2015 09:48
Toxaphene ND 0.035 0.050 1 07/16/2015 09:48
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 71 70-130 07/16/2015 09:48
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 27 of 85 ends

508
CC 06-03-2025
508 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-10 (1-1.5') DUP 1507427-020B Soil 07/09/2015 14:45 GC22 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/20/2015 13:40
a-BHC ND 0.00010 0.0010 1 07/20/2015 13:40
b-BHC ND 0.00025 0.0010 1 07/20/2015 13:40
d-BHC ND 0.00037 0.0010 1 07/20/2015 13:40
g-BHC ND 0.000097 0.0010 1 07/20/2015 13:40
Chlordane (Technical) 0.038 0.016 0.025 1 07/20/2015 13:40 a-Chlordane 0.0052 0.00047 0.0010 1 07/20/2015 13:40
g-Chlordane 0.0040 0.00021 0.0010 1 07/20/2015 13:40
p,p-DDD ND 0.00014 0.0010 1 07/20/2015 13:40
p,p-DDE 0.0019 0.00032 0.0010 1 07/20/2015 13:40
p,p-DDT 0.0048 0.00043 0.0010 1 07/20/2015 13:40
Dieldrin ND 0.00033 0.0010 1 07/20/2015 13:40
Endosulfan I ND 0.00065 0.0010 1 07/20/2015 13:40
Endosulfan II ND 0.00020 0.0010 1 07/20/2015 13:40
Endosulfan sulfate ND 0.00063 0.0010 1 07/20/2015 13:40 Endrin ND 0.00042 0.0010 1 07/20/2015 13:40
Endrin aldehyde ND 0.00020 0.0010 1 07/20/2015 13:40
Endrin ketone ND 0.00013 0.0010 1 07/20/2015 13:40
Heptachlor ND 0.00021 0.0010 1 07/20/2015 13:40
Heptachlor epoxide 0.0010 0.00020 0.0010 1 07/20/2015 13:40 Hexachlorobenzene ND 0.00027 0.010 1 07/20/2015 13:40
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/20/2015 13:40 Methoxychlor ND 0.00089 0.0010 1 07/20/2015 13:40
Toxaphene ND 0.035 0.050 1 07/20/2015 13:40
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 129 70-130 07/20/2015 13:40
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 28 of 85 ends

509
CC 06-03-2025
509 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-11 (1-1.5') 1507427-022A Soil 07/09/2015 15:10 GC22 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/20/2015 20:38
a-BHC ND 0.00010 0.0010 1 07/20/2015 20:38
b-BHC ND 0.00025 0.0010 1 07/20/2015 20:38
d-BHC ND 0.00037 0.0010 1 07/20/2015 20:38
g-BHC ND 0.000097 0.0010 1 07/20/2015 20:38
Chlordane (Technical) 0.095 0.016 0.025 1 07/20/2015 20:38 a-Chlordane 0.016 0.00047 0.0010 1 07/20/2015 20:38
g-Chlordane 0.0076 0.00021 0.0010 1 07/20/2015 20:38
p,p-DDD ND 0.00014 0.0010 1 07/20/2015 20:38
p,p-DDE 0.012 0.00032 0.0010 1 07/20/2015 20:38
p,p-DDT 0.024 0.00043 0.0010 1 07/20/2015 20:38
Dieldrin 0.00053 J 0.00033 0.0010 1 07/20/2015 20:38
Endosulfan I ND 0.00065 0.0010 1 07/20/2015 20:38
Endosulfan II ND 0.00020 0.0010 1 07/20/2015 20:38
Endosulfan sulfate ND 0.00063 0.0010 1 07/20/2015 20:38 Endrin ND 0.00042 0.0010 1 07/20/2015 20:38
Endrin aldehyde ND 0.00020 0.0010 1 07/20/2015 20:38
Endrin ketone ND 0.00013 0.0010 1 07/20/2015 20:38
Heptachlor ND 0.00021 0.0010 1 07/20/2015 20:38
Heptachlor epoxide 0.0018 0.00020 0.0010 1 07/20/2015 20:38 Hexachlorobenzene ND 0.00027 0.010 1 07/20/2015 20:38
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/20/2015 20:38 Methoxychlor ND 0.00089 0.0010 1 07/20/2015 20:38
Toxaphene ND 0.035 0.050 1 07/20/2015 20:38
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 111 70-130 07/20/2015 20:38
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 29 of 85 ends

510
CC 06-03-2025
510 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-12 (SURF) 1507427-023A Soil 07/09/2015 15:22 GC22 107585 Analytes Result MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/20/2015 21:13
a-BHC ND 0.00010 0.0010 1 07/20/2015 21:13
b-BHC ND 0.00025 0.0010 1 07/20/2015 21:13
d-BHC ND 0.00037 0.0010 1 07/20/2015 21:13
g-BHC ND 0.000097 0.0010 1 07/20/2015 21:13
Chlordane (Technical) 0.11 0.016 0.025 1 07/20/2015 21:13 a-Chlordane 0.013 0.00047 0.0010 1 07/20/2015 21:13
g-Chlordane 0.011 0.00021 0.0010 1 07/20/2015 21:13
p,p-DDD ND 0.00014 0.0010 1 07/20/2015 21:13
p,p-DDE 0.012 0.00032 0.0010 1 07/20/2015 21:13
p,p-DDT 0.018 0.00043 0.0010 1 07/20/2015 21:13
Dieldrin ND 0.00033 0.0010 1 07/20/2015 21:13
Endosulfan I ND 0.00065 0.0010 1 07/20/2015 21:13
Endosulfan II ND 0.00020 0.0010 1 07/20/2015 21:13
Endosulfan sulfate ND 0.00063 0.0010 1 07/20/2015 21:13 Endrin ND 0.00042 0.0010 1 07/20/2015 21:13
Endrin aldehyde ND 0.00020 0.0010 1 07/20/2015 21:13
Endrin ketone ND 0.00013 0.0010 1 07/20/2015 21:13
Heptachlor ND 0.00021 0.0010 1 07/20/2015 21:13
Heptachlor epoxide 0.0012 0.00020 0.0010 1 07/20/2015 21:13 Hexachlorobenzene ND 0.00027 0.010 1 07/20/2015 21:13
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/20/2015 21:13 Methoxychlor ND 0.00089 0.0010 1 07/20/2015 21:13
Toxaphene ND 0.035 0.050 1 07/20/2015 21:13
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 117 70-130 07/20/2015 21:13
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 30 of 85 ends

511
CC 06-03-2025
511 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-12 (1-1.5') 1507427-024A Soil 07/09/2015 15:25 GC22 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/21/2015 07:21
a-BHC ND 0.00010 0.0010 1 07/21/2015 07:21
b-BHC ND 0.00025 0.0010 1 07/21/2015 07:21
d-BHC ND 0.00037 0.0010 1 07/21/2015 07:21
g-BHC ND 0.000097 0.0010 1 07/21/2015 07:21
Chlordane (Technical) ND 0.016 0.025 1 07/21/2015 07:21 a-Chlordane 0.0012 0.00047 0.0010 1 07/21/2015 07:21
g-Chlordane 0.00059 J 0.00021 0.0010 1 07/21/2015 07:21 p,p-DDD 0.00041 J 0.00014 0.0010 1 07/21/2015 07:21
p,p-DDE 0.0027 0.00032 0.0010 1 07/21/2015 07:21
p,p-DDT 0.0063 0.00043 0.0010 1 07/21/2015 07:21
Dieldrin ND 0.00033 0.0010 1 07/21/2015 07:21
Endosulfan I ND 0.00065 0.0010 1 07/21/2015 07:21
Endosulfan II ND 0.00020 0.0010 1 07/21/2015 07:21
Endosulfan sulfate ND 0.00063 0.0010 1 07/21/2015 07:21 Endrin ND 0.00042 0.0010 1 07/21/2015 07:21
Endrin aldehyde ND 0.00020 0.0010 1 07/21/2015 07:21
Endrin ketone ND 0.00013 0.0010 1 07/21/2015 07:21
Heptachlor ND 0.00021 0.0010 1 07/21/2015 07:21
Heptachlor epoxide ND 0.00020 0.0010 1 07/21/2015 07:21 Hexachlorobenzene ND 0.00027 0.010 1 07/21/2015 07:21
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/21/2015 07:21 Methoxychlor ND 0.00089 0.0010 1 07/21/2015 07:21
Toxaphene ND 0.035 0.050 1 07/21/2015 07:21
Surrogates REC (%) Limits
Analyst(s): CK
Decachlorobiphenyl 82 70-130 07/21/2015 07:21
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 31 of 85 ends

512
CC 06-03-2025
512 of 1012
Analytical Report
McCampbell Analytical, Inc. 1534 Willow Pass Road, Pittsburg, CA 94565-1701 Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 http://www.mccampbell.com / E-mail: [email protected] "When Quality Counts" Client: Padre Associates. Inc.

Project: #1401-2171; CUPERTINO (SEDGWICK PEA)
Date Received: 7/13/15 17:18
Date Prepared: 7/13/15-7/16/15
WorkOrder: 1507427
Extraction Method: SW3550B
Analytical Method: SW8081A
Unit: mg/kg
Organochlorine Pesticides (Basic Target List)
P-14 (1-1.5') 1507427-028A Soil 07/10/2015 08:31 GC23 107585 Analytes Result Qualifiers MDL RL DF Date Analyzed
Client ID Lab ID Matrix Date Collected Instrument Batch ID Aldrin ND 0.00027 0.0010 1 07/18/2015 08:57
a-BHC ND 0.00010 0.0010 1 07/18/2015 08:57
b-BHC ND 0.00025 0.0010 1 07/18/2015 08:57
d-BHC ND 0.00037 0.0010 1 07/18/2015 08:57
g-BHC ND 0.000097 0.0010 1 07/18/2015 08:57
Chlordane (Technical) ND 0.016 0.025 1 07/18/2015 08:57 a-Chlordane 0.0014 0.00047 0.0010 1 07/18/2015 08:57
g-Chlordane 0.00089 J 0.00021 0.0010 1 07/18/2015 08:57 p,p-DDD 0.00047 J 0.00014 0.0010 1 07/18/2015 08:57
p,p-DDE 0.014 0.00032 0.0010 1 07/18/2015 08:57
p,p-DDT 0.0090 0.00043 0.0010 1 07/18/2015 08:57
Dieldrin ND 0.00033 0.0010 1 07/18/2015 08:57
Endosulfan I ND 0.00065 0.0010 1 07/18/2015 08:57
Endosulfan II ND 0.00020 0.0010 1 07/18/2015 08:57
Endosulfan sulfate ND 0.00063 0.0010 1 07/18/2015 08:57 Endrin ND 0.00042 0.0010 1 07/18/2015 08:57
Endrin aldehyde ND 0.00020 0.0010 1 07/18/2015 08:57
Endrin ketone ND 0.00013 0.0010 1 07/18/2015 08:57
Heptachlor ND 0.00021 0.0010 1 07/18/2015 08:57
Heptachlor epoxide ND 0.00020 0.0010 1 07/18/2015 08:57 Hexachlorobenzene ND 0.00027 0.010 1 07/18/2015 08:57
Hexachlorocyclopentadiene ND 0.00040 0.020 1 07/18/2015 08:57 Methoxychlor ND 0.00089 0.0010 1 07/18/2015 08:57
Toxaphene ND 0.035 0.050 1 07/18/2015 08:57
Surrogates REC (%) Limits
Analyst(s): SS
Decachlorobiphenyl 96 70-130 07/18/2015 08:57
CDPH ELAP 1644 ♦ NELAP 4033ORELAP Angela Rydelius, Lab Manager (Cont.)

Page 32 of 85 ends

513
CC 06-03-2025
513 of 1012

SUPPLEMENTAL SITE INVESTIGATION SUMMARY REPORT

SEDGWICK ELEMENTARY SCHOOL EXPANSION PROJECT
10480 FINCH AVENUE

CUPERTINO, SANTA CLARA COUNTY, CALIFORNIA
(Site Code: 204271)
Prepared for:

CUPERTINO UNION SCHOOL DISTRICT
NOVEMBER 2015
Attachment B
514
CC 06-03-2025
514 of 1012
515
CC 06-03-2025
515 of 1012
November 2015
Project No. 1401-2172
- i -

TABLE OF CONTENTS
Page

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

2.0 BACKGROUND............................................................................................... 2-1

3.0 SSI ACTIVITIES.............................................................................................. 3-1 OCPs ............................................................................................................ 3-1 Lead ............................................................................................................ 3-2 SSI Field Variances......................................................................................... 3-2 Quality Assurance/Quality Control (QA/QC) .................................................... 3-2

4.0 SSI RESULTS................................................................................................. 4-1 OCPs in Soil.................................................................................................... 4-1 Lead in Soil ..................................................................................................... 4-2 Duplicate Soil Samples.................................................................................... 4-2 Equipment Blank ............................................................................................. 4-3 Field Blank ...................................................................................................... 4-4 Laboratory QA/QC .......................................................................................... 4-4

5.0 RISK ASSESSMENT....................................................................................... 5-1

6.0 CONCLUSIONS AND RECOMMENDATIONS................................................ 6-1

7.0 REFERENCES ............................................................................................... 7-1 TABLES
4-1 Soil Results for OCPs ..................................................................................... 4-8 4-2 Soil Results for Lead ....................................................................................... 4-11 5-1 Soil Exposure Screening Evaluation................................................................ 5-2 516
CC 06-03-2025
516 of 1012
November 2015
Project No. 1401-2172
- ii -

TABLE OF CONTENTS (CONTINUED)
Page
PLATES
1-1 Site Plan.......................................................................................................... 1-2 1-2 Site Location.................................................................................................... 1-3 2-1 PEA Chlordane Results .................................................................................. 2-3 2-2 PEA Lead Results (Surface Soil)..................................................................... 2-4 3-1 Step-out Soil Samples - OCPs......................................................................... 3-3 3-2 Step-out Soil Samples - OCPs......................................................................... 3-4 3-3 Step-out Soil Samples – Lead ......................................................................... 3-5 4-1A Chlordane Results (Surface Soil)..................................................................... 4-13 4-1B Chlordane Results (Subsurface Soil)............................................................... 4-14 4-2 Lead Results (Surface Soil)............................................................................. 4-15 6-1 Estimated Extent of OCP/Lead Impacts (Main Residence).............................. 6-2 6-2 Estimated Extent of OCP Impacts (Driveway area).......................................... 6-3

APPENDICES
APPENDIX A: DTSC CORRESPONDENCE
APPENDIX B: QUALTITY ASSURANCE PROJECT PLAN (QAPP)
APPENDIX C: ANALYTICAL LABORATORY REPORTS AND CHAIN-OF-CUSTODYS APPENDIX D: LEADSPREAD
517
CC 06-03-2025
517 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
1-1

1.0 INTRODUCTION
This document presents the results of a Supplemental Site Investigation (SSI) that was completed by Padre Associates, Inc. (Padre), on behalf of the Cupertino Union School District (District), for the Sedgwick Elementary School Expansion Project located at 10480 Finch Avenue in Cupertino, Santa Clara County, California (Project Site). The Project Site is illustrated on Plate 1-1: Site Location and Plate 1-2: Site Plan.

The SSI was completed in accordance with the Padre document titled, Supplemental Site Investigation Technical Memorandum, Sedgwick Elementary Expansion Site, Cupertino Union School District, Cupertino, Ca (Site Code: 204271), dated October 14, 2015 and in general accordance with the following DTSC guidance documents:
• CALEPA, DTSC, Preliminary Endangerment Assessment Guidance Manual (January 1994, Interim Final – Final October 2013);
• DTSC, Interim Guidance for Sampling Agricultural Properties (Third Revision), dated August 7, 2008; and
• DTSC, Interim Guidance, Evaluation of School Sites with Potential Contamination as a Result of Lead from Lead-Based-Paint, Organochlorine Pesticides from Temiticides, and Polychlorinated Biphenyls from Electrical Transformers, revised June 9, 2006.

Padre previously submitted the report titled Preliminary Environmental Assessment, Sedgwick Elementary School Expansion Project, 10480 Finch Avenue, Cupertino, Santa Clara County California, dated September 2015. Based on the results of the PEA, elevated concentrations of chlordane and lead were identified in soil at the Project Site requiring further remedial investigations. Due to the presence of elevated concentrations of chlordane and lead, the potential cancer risk for the Project Site is greater than 1E-06, and a response action to reduce or eliminate the impact of the contaminants is recommended.

Recently, the risk screening level for chlordane was decreased from 1,700 micrograms per kilogram (μg/kg) to 430 μg/kg. Due to this revision, several soil sample locations were identified requiring further assessment. Therefore, the purpose of the SSI was to further assess and delineate the lateral and vertical extent of contaminated soil identified at the Project Site.

The SSI consisted of step-out and step-down soil samples to further delineate the extent of organochlorine pesticides (OCPs) and lead contamination in the area of the main residence and to further evaluate elevated lead concentrations identified at the southeast portion of the Project Site. The results of the SSI will be used to determine the extent of a response action at the Project Site.
518
CC 06-03-2025
518 of 1012
519
CC 06-03-2025
519 of 1012
520
CC 06-03-2025
520 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
2-1

2.0 BACKGROUND
The Project Site consists of approximately 1.48 acres of residential land and, which is identified by the Santa Clara County Assessor’s Office as Assessor Parcel Number (APN) 375- 40-067. The Project Site is located adjacent to the northwest corner of the Sedgwick Elementary School property at 10480 Finch Avenue in Cupertino, Santa Clara County, California.

Cupertino Union School District (District) intends to purchase the property as part of the Sedgwick Elementary School Expansion Project. The expansion project will not result in an addition of classrooms or students to the existing elementary school. Public water and sewer will be provided to the Project Site by the San Jose Water Company and the Sunnyvale Sanitation District, respectively.

Padre reviewed the document titled Phase I Environmental Site Assessment and Preliminary Soil Quality Evaluation, 10480 Finch Avenue, Cupertino, California dated July 1, 2014. A copy of the Phase I ESA has previously been provided to DTSC. The Phase I ESA was prepared by Cornerstone Earth Group (Cornerstone) on behalf of David J. Powers & Associates, and a copy was provided to DTSC. Below is a summary of the findings presented in the Phase I ESA:

The property is currently owned by F.A. Pestarino Jr. Trustee, and has been owned by the Pestarino family since the 1930s. The property historically contained a prune tree orchard.

According to a review of available historical aerial photographs, the Project Site was planted as an orchard from at least 1939 through the late 1950s. The existing residential building is present in a 1956 aerial photograph. In addition to the residence, the Project Site contains a workshop (wood-framed with corrugate metal roof) located at the southeast corner of the Project Site. Located south and adjacent to the workshop are two, small, single-room dwellings that are wood-framed and situated on concrete blocks.

In 1996 a 500-gallon gasoline underground storage tank (UST) was removed from the Project Site. Reportedly, the UST had been empty for approximately 20 years prior to removal.

Reportedly, two soil samples were collected below the ends of the UST at depths of approximately 7-feet below grade surface (bgs). Total petroleum hydrocarbons identified as gasoline (TPHg) were identified in soil at concentrations up to 60 milligrams per kilogram (mg/kg). The Santa Clara Valley Water District (SCVWD) subsequently issued a case-closure letter for the UST dated March 26, 1997 stating that “Due to the low levels of hydrocarbons detected and the site location, Santa Clara Valley Water District staff believes that with time the residual pollution will naturally attenuate and does not require any further corrective action at this time.”
Due to recognized environmental conditions (RECs) identified by the Phase I ESA, Cornerstone conducted preliminary soil assessment activities at the Project Site. Based on the historic agricultural use (orchard) at the Project Site and the age/construction of the existing structures, a total of sixteen surface soil samples were collected throughout the Project Site and 521
CC 06-03-2025
521 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
2-2
chemically analyzed for the presence of pesticides, arsenic, lead, and mercury. Five of the soil samples were collected at the perimeter of the residence, and two soil samples were collected at the perimeter of the workshop. Below is summary of the analytical results:
• Chlordane was reported at a maximum concentration of 2,800 micrograms per kilogram (µg/kg) at the location of soil sample SS-5 located along the western side of the residence;
• Arsenic was reported at concentrations ranging from 5.2 mg/kg to 15 mg/kg. The highest arsenic concentration was identified at the location of soil sample SS-6 located along the northwest property boundary; and
• Lead was reported at a maximum concentration of 100 mg/kg at the location of soil sample SS-2 located along the western side of the workshop.

The soil assessment activities included the advancement of one drill hole using directpush drilling technology to an approximate depth of 20 feet at the location of the former UST.

During July 2015 Padre conducted a Preliminary Environmental Assessment (PEA) to further assess the chemicals of concern identified as part of Cornerstone’s preliminary soil assessment activities. The results of the PEA were documented in the Padre report titled Preliminary Environmental Assessment, Sedgwick Elementary School Expansion Project, 10480 Finch Avenue, Cupertino, Santa Clara County, California, dated September 2015. Based on the results of the PEA, elevated concentrations of pesticides and lead were identified at the Project Site requiring further investigation and/or remediation.

Based on the results of the PEA, chlordane and was identified in surface soils at the Project Site at concentrations exceeding their respective human health screening levels. The total increased cancer risk from chlordane identified in soils at the Project Site is estimated to be

3.2 x 10-5, which exceeds DTSC’s “point of departure” of 1 in 1,000,000 (>10-6). Chlordane concentrations identified in soil during the course of the PEA are presented on Plate 2-1.

Concentrations of lead ranged from 9.0 to 310 mg/kg in surface soil samples collected at the Project Site. Using DTSC’s lead risk assessment spreadsheet model (LeadSpread Version 8), exposure to the lead concentrations identified at the Project Site would result in a 90th percentile blood lead concentration of 8.0 micrograms per deciliter (µg/dl) in children, which exceeds the Office of Environmental Health Hazard Assessment (OEHHA) blood toxicity level of 1 µg/dl. Lead concentrations identified in surface soil during the course of the PEA are presented on Plate 2-2.
522
CC 06-03-2025
522 of 1012
523
CC 06-03-2025
523 of 1012
524
CC 06-03-2025
524 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
3-1

3.0 SSI ACTIVITIES
On October 27, 2015 soil samples were collected in accordance with the sample collection procedures outlined in the Project Site PEA Work Plan, dated May 2015; and the SSI Technical Memorandum dated October 2015 and approved by DTSC. A copy of the SSI Technical Memorandum approval letter are presented in Appendix A.

During the completion of the PEA, elevated concentrations of chlordane were identified around the perimeter of the main residence building at concentrations exceeding the DTSCmodified screening level of 430 µg/kg. Additionally, lead was identified in several locations at concentrations exceeding DTSC’s screening level of 80 mg/kg. The SSI field sampling plan is summarized below:

OCPs
• At the location of sample point P-4 (west side of residence), chlordane was identified at a concentration of 1,100 µg/kg at a depth of 1.0 to 1.5 feet. At this location, discrete step-down soil samples were collected from approximate depths of 2.0 to 2.5 feet and 3.0 to 3.5 feet. The 2.0 to 2.5-foot sample was chemically analyzed for OCPs and the 3.0 to 3.5-foot sample was placed on-hold with the analytical laboratory. The step-down soil sample location are presented on Plate 3-1.
• At the location of sample points P-10 and P-11 (north side of residence) and P-15 (east side of residence), chlordane was identified in surface soil samples exceeding 430 µg/kg. At these locations, step-out samples were collected at the surface to 0.5 feet and depths of 1.0 to 1.5 feet and chemically analyzed for OCPs. The step-out soil sample locations are presented on Plate 3-1. • At the location of surface soil sample SS-6 collected during the June 2014 preliminary soil assessment conducted by Cornerstone, chlordane was identified at a concentration of 520 µg/kg which exceeds the revised DTSC-modified screening level of 430 µg/kg. Since this location is not near a structure, Padre collected step-out soil samples on 5 and 10-foot centers from SS-6. Soil samples were collected at the surface to 0.5 feet, depths of 1.0 to 1.5 feet and

2.0 to 2.5 feet. The surface and 1.0 to 1.5-foot samples were chemically analyzed for OCPs and the 2.0 to 2.5-foot samples were placed on-hold with the analytical laboratory. Additionally, the 10-foot step-out samples were placed onhold pending the results of the 5-foot step-out soil samples. The step-out soil sample locations are presented on Plate 3-2.
525
CC 06-03-2025
525 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
3-2
Lead
• At the location of sample points P-13 and P-15 (residence courtyard) step-out samples were collected at the surface to 0.5 feet and chemically analyzed for lead. The step-out soil sample locations are presented on Plate 3-3. • At the location of sample points P-17 and P-28 (single-room dwelling) step-out samples were collected at the surface to 0.5 feet and chemically analyzed for lead. The step-out soil sample locations are presented on Plate 3-3.

SSI Field Variances
During the course of sampling activities, one additional soil sample (P-29A (SURF)) was collected and chemically analyzed for lead to further characterize this area of the Project Site.

Quality Assurance / Quality Control (QA/QC)
For quality control/quality assurance (QA/QC) measures, approximately 10% of the discrete soil samples (OCPs, lead) were split by the analytical laboratory and chemically analyzed as duplicate samples. Additionally, one equipment blank (water sample) and field blank (water sample) per sample event were chemically analyzed for the presence of arsenic and lead. Them, collection of these samples is discussed in more detail in the quality assurance project plan (QAPP) is presented in Appendix B.

526
CC 06-03-2025
526 of 1012
527
CC 06-03-2025
527 of 1012
528
CC 06-03-2025
528 of 1012
529
CC 06-03-2025
529 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-1

4.0 SSI RESULTS
The following sections of this document present the results of field sampling activities performed by Padre at the Project Site on October 27th, 2015. The laboratory analytical results are summarized in Table 4-1 and Table 4-2. Additionally, chlordane concentrations identified at the Project Site are presented on Plates 4-1A (surface soil) and 4-1B (subsurface soil), and lead concentrations identified in surface soil are presented on Plate 4-2. Certified analytical laboratory reports and chain-of-custody documentation are provided in Appendix D.

OCPs in Soil
Main Residence. Discrete step-out soil samples were collected at locations of previously collected soil samples around the main residence structure where concentrations of OCPs were identified exceeding their respective screening levels. Results of the laboratory analysis are summarized below:

The following OPCs were identified at concentrations exceeding regulatory screening levels:
• Chlordane (technical) was reported at concentrations ranging from less than 25 to 4,800 µg/kg. The highest concentration of chlordane was identified in soil sample P-10D (SURF).

The following OPCs were identified at concentrations below regulatory screening levels:
• DDD was reported at concentrations ranging from less than 1.0 to 6.4 µg/kg; • DDE was reported at concentrations ranging from less than 1.0 to 150 µg/kg; • DDT was reported at concentrations ranging from less than 1.0 to 81 µg/kg; • Dieldrin was reported at concentrations ranging from less than 1.0 to 1.7 µg/kg; • Endrin was reported at a concentration 2.1 µg/kg;
• Heptachlor was reported at concentrations ranging from less than 1.0 to

5.4 µg/kg; and
• Heptachlor epoxide was reported at concentrations ranging from less than 1.0 to 30 µg/kg.

Soil Sample SS-6. At the approximate location of surface soil sample SS-6, a soil sample (SS-6A) was collected at the surface to 0.5 feet and 1.0 to 1.5 feet and chemically analyzed for OCPs. Additionally, step-out soil samples were collected on 5 and 10-foot centers 530
CC 06-03-2025
530 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-2
with the 10-foot sample placed on-hold pending the results of the 5-foot step-out soil samples.

Results of the laboratory analysis are summarized below:

The following OPCs were identified at concentrations below regulatory screening levels:
• Chlordane (technical) was reported at concentrations ranging from less than 25 to 44 µg/kg;
• DDD was reported at concentrations ranging from less than 1.0 to 2.5 µg/kg; • DDE was reported at concentrations ranging from 0.45J to 25 µg/kg; • DDT was reported at concentrations ranging from less than 1.0 to 20 µg/kg; • Heptachlor was reported at concentrations ranging from less than 1.0 to 0.65J µg/kg; • Heptachlor epoxide was reported at concentrations ranging from less than 1.0 to

1.0 µg/kg; and
• Toxaphene was reported at concentrations ranging from less than 50 to 410 µg/kg.

Lead in Soil
At the location of PEA sample points P-13 and P-15 (residence courtyard) step-out samples were collected at the surface to 0.5 feet and chemically analyzed for lead. The results are summarized below:
• Lead was reported at concentration ranging from 31 to 68 mg/kg.

At the location of sample points P-17 and P-28 (single-room dwelling) step-out samples were collected at the surface to 0.5 feet and chemically analyzed for lead. The results are summarized below:
• Lead was detected at concentration ranging from 60 to 73 (mg/kg).

Duplicate Soil Samples
Two discrete soil samples were split by the analytical laboratory and chemically analyzed for the presence of OCPs by U.S. EPA Method 8081A. The analytical results are presented in Table 4-1 and summarized below.

For discrete soil sample P-11B (SURF) and the associated duplicate soil sample:
• Chlordane was reported at concentrations of 650 and 470 µg/kg, respectively. The results are comparable;
• DDD was reported at concentrations of 4.3 and 4.4 µg/kg, respectively. The results 531
CC 06-03-2025
531 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-3
are comparable;
• DDE was reported at concentrations of 26 and 21 µg/kg, respectively. The results are comparable;
• DDT was reported at concentrations of 55 and 44 µg/kg, respectively. The results are comparable;
• Dieldrin was not reported at a concentration of less than 1.0 and 1.7 µg/kg in the associated duplicate soil sample which is slightly above the reporting limit of

1.0 µg/kg. The results are comparable;
• Heptachlor was reported at concentrations of less than 1.0 and 0.71J, respectively.

The results are comparable; and
• Heptachlor epoxide was reported at concentrations of 4.7 and 3.8 µg/kg, respectively. The results are comparable.

For discrete soil sample P-15A (1.0-1.5’) and the associated duplicate soil sample:
• DDD was reported at concentrations of 1.7 and 0.99J, respectively. The results are comparable;
• DDE was reported at concentrations of 9.2 and 6.2 µg/kg, respectively. The results are comparable;
• DDT was reported at concentrations of 7.1 and 6.5 µg/kg, respectively. The results are comparable;
• Heptachlor was reported at concentrations of 0.34J and less than 1.0 µg/kg, respectively. The results are comparable.

One discrete soil sample was split by the analytical laboratory and chemically analyzed for the presence of lead by U.S. EPA Method 6020. The analytical results are presented in Table 4-1 and summarized below.

For discrete soil sample P-17A (SURF) and the associated duplicate soil sample:
• Lead was reported at concentrations of 73 and 60 mg/kg, respectively. The results are comparable.

Equipment Blank
Distilled water was used as rinseate for decontaminating sampling equipment. The equipment blank sample was collected by carefully pouring rinseate water over and through recently cleaned equipment, and collected directly into the appropriate sample container. 532
CC 06-03-2025
532 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-4
One equipment blank sample was collected for each sample event and chemically analyzed for lead by U.S. EPA Method 200.8. The results of the laboratory analysis are summarized below.
• The laboratory analysis did not identify lead at or above the analytical reporting limit.

Field Blank
One field blank sample was collected for each sampling event and chemically analyzed for lead by U.S. EPA Method 200.8. The results of the laboratory analysis are summarized below.
• The laboratory analysis did not identify lead at or above the analytical reporting limit.

Laboratory QA/QC
A cover letter with the signature of the lab director of CLS accompanies every laboratory report received for this project. According to the lab director, samples were analyzed utilizing EPA or other ELAP approved methodologies, and that the results are in compliance both technically and for completeness. The data quality objectives (DQO) met by laboratory for this project was level II. Copies of the CLS laboratory reports are presented in Appendix C.

CLS Work Order # 1510A30 – Report dated October 28, 2015 The laboratory reported the following notes regarding lead analysis:
• The matrix spike, matrix spike duplicate recovery, and relative percent deviation for lead was out of acceptance criteria but was validated by the post digestion spike.
• The relative percent deviation for the surrogate recovery was out of acceptance criteria but was validated by the post digestion spike.

The laboratory reported the following notes regarding Organochlorine Pesticides by U.S.

EPA Method 8081A for the following discrete soil samples:

The laboratory reported the following notes regarding discrete soil sample SS-6A (SURF):
• The concentration of DDD is less than the minimum level of quantitation (ML) but greater than the minimum detection limit (MDL). The reported concentration of DDD is an estimate.
• The concentration of dieldrin is less than the ML but greater than the MDL. The reported concentration of dieldrin is an estimate.
• The concentration of heptachlor is less than the ML but greater than the MDL.

The reported concentration of heptachlor is an estimate. 533
CC 06-03-2025
533 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-5
The laboratory reported the following notes regarding discrete soil sample SS-6A (1.0-

1.5’):
• The concentration of DDD is less than the ML but greater than the MDL. The reported concentration of DDD is an estimate.

The laboratory reported the following notes regarding discrete soil sample SS-6B (SURF):
• The concentration of DDD is less than the ML but greater than the MDL. The reported concentration of DDD is an estimate.
• The concentration of dieldrin is less than the ML but greater than the MDL. The reported concentration of dieldrin is an estimate.

The laboratory reported the following notes regarding discrete soil sample SS-6C (SURF):
• The concentration of dieldrin is less than the ML but greater than the MDL. The reported concentration of dieldrin is an estimate.
• The concentration of heptachlor epoxide is less than the ML but greater than the MDL. The reported concentration of heptachlor epoxide is an estimate.

The laboratory reported the following notes regarding discrete soil sample SS-6D (SURF):
• The concentration of DDD is less than the ML but greater than the MDL. The reported concentration of DDD is an estimate.
• The concentration of heptachlor epoxide is less than the ML but greater than the MDL. The reported concentration of heptachlor epoxide is an estimate.

The laboratory reported the following notes regarding discrete soil sample SS-6B (1.0-

1.5’):
• The concentration of DDE is less than the ML but greater than the MDL. The reported concentration of DDE is an estimate.

The laboratory reported the following notes regarding discrete soil sample SS-6E (SURF):
• The concentration of dieldrin is less than the ML but greater than the MDL. The reported concentration of dieldrin is an estimate.
534
CC 06-03-2025
534 of 1012
November 2015
Project No. 1401-2172
SSI Sum Rpt_Cupertino
4-6
The laboratory reported the following notes regarding discrete soil sample SS-6E (1.0-

1.5’):
• The concentration of DDE is less than the ML but greater than the MDL. The reported concentration of DDE is an estimate.
• The concentration of heptachlor is less than the ML but greater than the MDL.