report summary report 2021-10-29

Summary Report Demolition and Soil Remediation Chevron Dewey-Humboldt Site 12903 Kloss Avenue Dewey–Humboldt, Yavapai County, Arizona Prepared for: Chevron Environmental Management Company 6001 Bollinger Canyon Road San Ramon, CA 94583 November 2021

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Summary Report Demolition and Soil Remediation Chevron Dewey-Humboldt Site 12903 Kloss Avenue Dewey–Humboldt Yavapai County, Arizona Prepared for: Chevron Environmental Management Company 6001 Bollinger Canyon Road San Ramon, California 945583 Prepared by: AECOM 19219 Katy Freeway, Suite 100 Houston, TX 77094 aecom.com

_________________________________________ Wallace Gilmore, P.G. Sr. Project Manager

_ _________________________________________ Andrew Messer, P.G. Principal Hydrogeologist Copyright © 2021 by AECOM All rights reserved. No part of this copyrighted work may be reproduced, distributed, or transmitted in any form or by any means without the prior written permission of AECOM.

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Table of Contents 1. Site Background ............................................................................................................................... 1

2. Summary of Structure Demolition Activities ..................................................................................... 2

3. Summary of Soil Remediation Activities .......................................................................................... 2

3.1 Field Screening and Soil Excavation ...................................................................................... 2

3.2 Soil Sample Collection and Laboratory Analysis .................................................................... 3

3.3 Soil Analytical Results ............................................................................................................ 3

4. Waste Disposition............................................................................................................................. 3

5. Conclusions ...................................................................................................................................... 3

6. References ....................................................................................................................................... 4

Figures Figure 1 Site Location Map

Figure 2 Site Layout Map

Figure 3 Soil Excavation Areas

Figure 4 Soil Confirmation Sample Results

Tables Table 1 Soil Confirmation Sample Results

Appendices Appendix A Site Photographs

Appendix B NESHAP Notification Form

Appendix C Soil Laboratory Analytical Report and Data Usability Summary

Appendix D Soil Disposal Documentation

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1. Site Background On behalf of Chevron Environmental Management Company (CEMC), AECOM has prepared this Summary Report for Demolition and Soil Remediation at the Chevron Dewey-Humboldt site in Dewey-Humboldt, Yavapai County, Arizona (the Site). This report describes the Site background and demolition/soil remediation activities conducted during June and July 2021.

The Site consists of two parcels covering approximately 1.38 acres in Dewey-Humboldt, Arizona (collectively referred to as the Site in this document). The Site is owned by Chevron USA. A Site Location Map is provided as Figure 1. A Site Layout Map is provided as Figure 2.

The larger parcel, designated as Yavapai County Assessor’s Parcel Number (APN) 402-09-013, covers approximately 1.31 acres and has an assigned address of 12903 Kloss Avenue. At the time field activities were initiated for this project, the Kloss parcel was an unused lot containing remnants of concrete and brick structures and foundations, high desert vegetation, pedestrian pathways, and vehicular roadways. Site photographs are provided in Appendix A.

The smaller parcel, designated as APN 402-09-015, covers approximately 0.07 acres and has an assigned address of 2543 S. Hill Street. The Hill Street parcel has reportedly been vacant land since at least 1943 and was being used as an unpaved driveway between single-family residences at the time field activities were initiated for this project.

Previous assessment activities conducted at the Site include the following:

• In December 2019, an area resident reportedly collected two soil samples within the Kloss parcel and analyzed the samples using a hand-held X-Ray Fluorescence (XRF) analyzer. The lead concentration in one of the samples was reportedly measured to be 1,384 parts per million (ppm).

• From September 28, 2020 through October 1, 2020, a contractor for the Arizona Department of Environmental Quality (ADEQ) conducted further soil assessment by establishing a sample grid across the Site and collecting near-surface (collected between 0 and 2 inches below ground surface (bgs)) and deep (collected between 12 and 14 inches bgs) soil samples for field screening of the eight Resource Conservation and Recovery Act (RCRA) metals using an XRF. Based on the field screening results, 17 near-surface samples and 6 deep samples were submitted for laboratory analysis of RCRA metals by United States Environmental Protection Agency (USEPA) Methods 6010/7471. The laboratory analytical results indicated the following:

─ Near-surface sample 16-2 exhibited a lead concentration of 450.3 milligrams per kilogram (mg/kg); and

─ Near-surface sample 36-2 exhibited a lead concentration of 431 mg/kg.

These reported lead concentrations exceeded the applicable Site residential Soil Remediation Level (rSRL) of 400 mg/kg under Arizona Administrative Code § 18-7-203. The reported lead concentrations also exceeded the Minimum Groundwater Protection Level (GPL) of 290 mg/kg established for lead by the ADEQ.

The primary objectives for this project included:

• Demolition of the onsite building and foundation remnants; and

• Remediation of soil lead concentrations in excess of 290 mg/kg through excavation and offsite disposal.

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2. Summary of Structure Demolition Activities

AECOM contracted with Overley’s, of Gilbert, Arizona, to demolish the concrete and brick building and foundation remnants that were present across the Site. On June 25, 2021, Overley’s subcontractor, Phoenix Environmental Group, collected representative samples of construction materials intended for demolition and disposal. The samples were submitted to Lindus Environmental Laboratory, a National Voluntary Laboratory Accreditation Program (NVLAP)-certified Lab Code 500031-0), for analysis using Polarized Light Microscopy (PLM) by USEPA Methods 600/M4-82-020 and 600/R-93/116, PLM Analysis for Asbestos. Based on the laboratory results, no asbestos-containing material (ACM) was identified. Upon receipt of the asbestos analytical results, Overley’s submitted an Asbestos NESHAP (National Emission Standards for Hazardous Air Pollutants) Notification Form to the ADEQ. A copy of the NESHAP Notification Form is provided as Appendix B.

From July 19 to July 22, Overley’s completed demolition of the on-site structure remnants. Concrete and brick demolition debris was transported offsite for recycling by Prescott Valley Construction Debris located at 2640 N Lake Valley Rd. in Prescott Valley, AZ. Miscellaneous debris, including fiberboard, wooden pallet, rusted metal containers, and discarded furniture, was transported offsite for disposal as general trash at the Waste Management Gray Wolf Regional Landfill near Dewey, AZ.

Due to the area of soil excavation being less than one acre, an Arizona Pollutant Discharge Elimination System General Permit for Stormwater Discharges Associated with Construction Activity to Surface Waters was not required for the soil excavation activities conducted at the Site. However, stormwater Best Management Practices (BMPs) implemented at the Site included installation of straw wattles along the downslope property boundary to prevent potential sediment discharge from the Site during the soil excavation activities.

3. Summary of Soil Remediation Activities

Remediation of impacted soil was conducted at former sample locations 16-2 and 36-2 where lead concentrations exceeded the ADEQ GPL of 290 mg/kg. The soil assessment and remediation activities were conducted from July 20 to July 28, 2021 and included the activities described below.

3.1 Field Screening and Soil Excavation Prior to initiating soil sampling and excavation activities, Arizona 811 (Blue Stake) was contacted to locate the public utilities in the Site vicinity, as well as utilities located on the non-public Site property, if possible. AECOM also contracted with a private utility locator, GPRS, to conduct a geophysical survey to identify anomalous underground features, specifically for the presence of underground structures and utilities in the proposed soil excavation areas.

Field screening of shallow surface soil (0 – 6 inches bgs) was initially conducted on approximately 5-foot grid spacing centered at former sample locations 16-2 and 36-2. The sample grid was extended in 5-foot increments until XRF screening results indicated that the horizontal extent of lead concentrations in excess of 290 ppm had been fully delineated in the areas of former sample locations 16-2 and 36-2. Soil was then excavated to a depth of approximately 6 inches bgs in the area delineated by the XRF field screening results. The field screening results indicated lead concentrations as high as 1,814 ppm in the excavated soil, which was placed in roll-off boxes pending offsite transportation and disposal.

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Upon completion of the initial soil excavation activities in each area, soil samples were collected from four locations in the bottom of each excavation for field screening with the XRF. The bottom soil samples were collected from depths approximately 6 inches below the original ground surface. With the exception of the sample collected from the northern quadrant of the 16-2 excavation which exhibited a lead concentration of 563 ppm, XRF field screening results indicated lead concentrations below 290 mg/kg in the bottom confirmation soil samples. A vertical delineation sample was collected from a depth of approximately 6 – 10 inches below the original ground surface in the northern quadrant of the 16-2 excavation. The field screening result for this deeper sample indicated a lead concentration of 72 ppm. Based on the field screening results for the vertical delineation sample, the soil was excavated to a depth of approximately 10 inches below the original ground surface in the northern quadrant of the 16-2 excavation. The soil excavation areas are shown on Figure 3.

3.2 Soil Sample Collection and Laboratory Analysis Based on July 27, 2021 field screening results that indicated vertical delineation of elevated lead concentrations in the 16-2 excavation, final soil confirmation samples were collected for laboratory analysis, including four sidewall and four bottom samples from each excavation. The soil confirmation samples collected for laboratory analysis were placed in laboratory-supplied sample containers, packed in an ice-filled cooler and shipped to Pace Analytical National in Mount Juliet, TN for laboratory analysis of lead using EPA Method 6010D. The Laboratory Analytical Report and a Data Usability Summary are provided in Appendix C.

Upon completion of the excavation and soil sampling activities, the ground surface in the area of the excavations was graded to conform with the surrounding topography.

3.3 Soil Analytical Results The laboratory analytical results for the soil confirmation samples indicated lead concentrations ranged from 9.12 to 206 mg/kg. These reported concentrations are below the ADEQ rSRL of 400 mg/kg and GPL of 290 mg/kg for lead. The laboratory analytical results for the soil confirmation samples are shown in Table 1 and on Figure 4.

4. Waste Disposition The excavated soil was placed into roll-off boxes and transported offsite for disposal at the Waste Management Northwest Regional Landfill in Surprise, AZ. Waste disposal documentation is provided in Appendix D.

5. Conclusions Field observations and data collected during Site field activities include the following:

• The remnants of former concrete and brick structures and foundations have been demolished and the associated demolition debris transported offsite for recycling.

• Lead impacted soil in former sample collections areas 16-2 and 36-2 has been remediated through excavation and offsite disposal. Soil confirmation sampling results for both areas demonstrated remaining lead concentrations in soil are below the ADEQ rSRL of 400 mg/kg and GPL of 290 mg/kg.

• Excavated soil was transported offsite for disposal at the Waste Management Northwest Regional Landfill in Surprise, AZ

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6. References Matrix New World Engineering, Land Surveying and Landscape Architecture, PC. 2021. SOIL

SAMPLING REPORT FOR CHEVRON AND TOWN OF DEWEY–HUMBOLDT PARCELS, Dewey-Humboldt, Arizona. February 5.

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Figures

SITE LOCATION

SCALE IN FEET:

DATE: DRAWN BY: REVIEWED BY: PROJECT NO.:

NOTE: ALL MAP FEATURES ARE APPROXIMATE INSCALE AND LOCATION.

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19219 Katy Freeway, Suite 100Huston, Texas 77094W. GILMOREV. SIRBUAUGUST 2021 60662030

FIGURE 1SITE LOCATION MAP

CHEVRONDEWEY - HUMBOLDT SITE

Dewey - Humboldt, AZ12903, Kloss Ave.

600600

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19219 Katy Freeway, Suite 100Huston, Texas 77094W. GILMOREV. SIRBUAUGUST 2021 60662030

FIGURE 2SITE LAYOUT MAP



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LEGEND

APPROXIMATE SITE BOUNDARY

16-2 EXCAVATION

36-2 EXCAVATION

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019219 Katy Freeway, Suite 100

Huston, Texas 77094W. GILMOREC. BUJOR NOVEMBER 2021 60662030

FIGURE 3SOIL EXCAVATION AREAS



GOOGLE IMAGERY, 2019

4040

16-2 EXCAVATION

36-2 EXCAVATION

36-2-B-S44.1

(10'')

36-2-S-SE128

36-2-S-NE10.2

36-2-B-E22.6

36-2-S-NW52.8

36-2-B-N46.7

36-2-B-W29.4 36-2-S-SW

81.7

16-2-S-NW23.0

16-2-B-N58.5

16-2-B-W27.0

16-2-S-SW206

16-2-B-S69.0

16-2-S-SE37.7

16-2-B-E107

16-2-S-NE201

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019219 Katy Freeway, Suite 100

Huston, Texas 77094W. GILMOREC. BUJOROCTOBER 2021 60662030

FIGURE 4SOIL CONFIRMATION

SAMPLE RESULTS MAP



GOOGLE IMAGERY, 2019

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SOIL CONFIRMATION SAMPLELOCATION

HATCHED AREA EXCAVATED TO10 INCHES (ALL REMAING AREASEXCAVATED TO 6 INCHES)

LEAD CONCENTRATION IN MILIGRAMSPER KILOGRAM (mg/kg)

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Tables

Table 1Soil Confirmation Sample Results

Chevron Dewey- Humboldt SiteDewey-Humboldt, AZ

Sample ID Sampling Date Sample Depth (inches bgs)

Laboratory Lead Concentration

(mg/kg)

XRF Lead Concentration

(ppm) 16-2-S-SW 7/27/2021 0 - 6 206 20316-2-S-NE 7/27/2021 0 - 6 201 26816-2-S-NW 7/27/2021 0 - 6 23.0 6916-2-B-N 7/27/2021 6 - 10 58.5 72Dupe-1 7/27/2021* 6 - 10 36.2 --

16-2-B-S 7/27/2021 0 - 6 69.0 11416-2-B-W 7/27/2021 0 - 6 27.0 5516-2-B-E 7/27/2021 0 - 6 107 --

16-2-S-SE 7/27/2021 0 - 6 37.7 --36-2-S-SE 7/27/2021 0 - 6 128 20036-2-S-NE 7/27/2021 0 - 6 10.2 110

Dupe-2 7/27/2021* 0 - 6 9.12 --36-2-S-NW 7/27/2021 0 - 6 52.8 27036-2-S-SW 7/27/2021 0 - 6 81.7 14536-2-B-N 7/27/2021 0 - 6 46.7 8536-2-B-E 7/27/2021 0 - 6 22.6 5136-2-B-S 7/27/2021 0 - 6 44.1 9336-2-B-W 7/27/2021 0 - 6 29.4 69

Notes:bgs - below ground surfaceppm - parts per millionmg/kg - milligrams per kilogramXRF - X-Ray Fluoresence field screening instrument* - Duplicate

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Appendix A Site Photographs

PHOTO LOG

Chevron – Dewey-Humboldt Site 12903 Kloss Ave. Humboldt, AZ 86329

Page 1

01 – Concrete Structures

02 – Concrete Demolition

PHOTO LOG


Page 2

03 – Loading Concrete Debris for Disposal

04 – Begin Excavation 16-2

PHOTO LOG


Page 3

05 – Continue Excavation 16-2

06 – Loading Soil from Excavation 16-2

PHOTO LOG


Page 4

07 – Begin Excavation 36-2

08 – Loading Soil from Excavation 36-2

PHOTO LOG


Page 5

09 – Continue Excavation 36-2

10 – Completed Excavation 16-2

PHOTO LOG


Page 6

11 – Completed Excavation 36-2

12 – Excavation 36-2 after surface grading

PHOTO LOG


Page 7

13 – Excavation 16-2 after surface grading

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Appendix B NESHAP Notification Form

ARIZONA DEPARTMENT OF ENVIRONMENTAL QUALITY ASBESTOS NESHAP NOTIFICATION FOR RENOVATION AND DEMOLITION ACTIVITIES

National Emission Standards for Hazardous Air Pollutants (NESHAP)

1. TYPE OF NOTIFICATION: ☐Original ☐Revision 1 ☐Revision 2 ☐Revision 3 ☐Revision 4 ☐Revision 5 ☐Revision 6 Revision _______ ☐Cancel

2a. FACILITY OWNER INFORMATION Name of Company or Individual: Address: City/Community: State: Zip: Contact Person: Contact No.: Email: 2b. ASBESTOS REMOVAL CONTRACTOR/OPERATOR: Address: City: State: Zip: Contact Person: Contact No.: Email: 2c. DEMOLITION CONTRACTOR/OPERATOR: Address: City: State: Zip: Contact Person: Contact No.: Email: 3. TYPE OF OPERATION: ☐ Renovation ☐ Emergency Renovation ☐ Demolition ☐ Ordered Demolition ☐ Annual Non-scheduled Operations 4. PROVIDE DATE OF THOROUGH INSPECTION OF FACILITY, OR AFFECTED PART BY AN

AHERA (Asbestos Hazard Emergency Response Act) CERTIFIED BUILDING INSPECTOR DATE:

5. FACILITY DESCRIPTION (Attach site location map for multiple structures at one street address or installation) Building Name:

Area/Location of Activities: (building # - floor # - units - equipment - identifying features)

Street Address:

City: Zip: County:

6. PROCEDURE, INCLUDING ANALYTICAL METHOD, EMPLOYED TO DETECT THE PRESENCE OF RACM AND CATEGORY I AND CATEGORY II NONFRIABLE ACM. ☐ Polarized Light Microscopy-PLM ☐ Point Counting ☐ Assumed ☐ Other ___________________ NVLAP Laboratory Name______________________________________________ Number of Samples Date Analyzed _______________________________

7. APPROXIMATE AMOUNT OF ASBESTOS, INCLUDING: *NOTE: Update notice as necessary including when the

amount of asbestos affected changes by a least 20%

Amount of RACM to be Removed or Generated Amount of Nonfriable ACM

to be removed Amount of Nonfriable ACM not to be removed during demo

CAT I CAT II CAT I CAT II On Facility Components; Pipes (Linear Feet)

On Facility Components; Surface Area (Square Feet)

Off Facility Components; Volume (Cubic Feet)

8. DATES FOR ASBESTOS REMOVAL

Start Date: Completion Date:

Days of Operations: M T W TH F SA SU

Hours of Operations: 9. DATES FOR DEMOLITION

Start Date: Completion Date: Days of Operations: M T W TH F SA SU

Hours of Operations: MAIL / DELIVER TO:

ADEQ - Asbestos NESHAP Program

1110 West Washington Street Phoenix, Arizona 85007

(602) 771-2333 or (602) 771-4553

THIS AREA FOR NESHAP REGULATORY AGENCY USE ONLY

U.S. Postal Service Postmark Date: Commercial / Hand Delivery Date:

Chevron USA Inc.

San Ramon CA 94583

n/a

Western Utility Contractors, LLC dba Overley's Est 19591094 South Gilbert Road, Suite 203

Gilbert AZ 85296Tyler Schucker 480-821-5455 [email protected]

June 25, 2021

Former Chevron Facility Concrete Structure

12903 Kloss Avenue Humboldt 86329 Yavapai

Lindus 9 June 30, 2021

n/a n/a n/a n/a n/a

n/a n/a n/a n/a n/a

n/a n/a n/a n/a n/a

n/a n/a n/a

07/19/2021 07/23/2021 0600 to 1700

6001 Bollinger Canyon Road Room C2176

Mike Oliphant 925-588-1126 [email protected]

Remnants of Concrete Structures Throughout Site

10. DESCRIPTION OF PLANNED DEMOLITION/RENOVATION WORK: (Check all that apply) ☐ Thermal System Insulation ☐ Ceiling Texture/Tiles ☐ Duct/Seam Tape ☐ Regulated Drywall System ☐ Asbestos-Containing Roof Removal ☐ Asbestos Cement Pipe ☐ Asbestos Cement Shingles ☐ VAT/Mastic ☐ Asbestos Cement Siding >5580 sq ft w/rotating blade cut Other, please specify:______________________________________________________________________________________________________________

REMOVAL METHODS: ☐ Hand/Non-Mechanical Tools ☐ Mechanical/Power Tools ☐ Mastic Solvents Other:___________________________________________________________________________________________________________________________ 11. DESCRIPTION OF WORK PRACTICES AND ENGINEERING CONTROLS TO BE USED TO PREVENT ASBESTOS EMISSIONS: (Check all that apply) ☐ Adequately Wet ☐ Full Containment ☐ Critical Barriers ☐ Negative Air Machines ☐ Glove-Bag ☐ Leak-Tight Wrap ☐ 6-mil Bags ☐ Mini-containment ☐ Decontamination Unit with Hot/Cold Water and Soap for OSHA Class I work Other:__________________________________________________ 12a. ASBESTOS WASTE TRANSPORTER #1: Company Name: Address: City: State: Zip: Contact Person: Contact No.: Email:

12b. ASBESTOS WASTE TRANSPORTER #2: Company Name: Address: City: State: Zip: Contact Person: Contact No.: Email: 13. ASBESTOS WASTE DISPOSAL SITE: Company Name: Address: City: State: Zip: Contact Person: Contact No.: Email: 14. FOR ORDERED DEMOLITIONS (40 CFR 61, §61.145(A)(3), ATTACH A COPY OF THE AGENCY’S ORDERED DEMOLITION LETTER Name: Title: State or Local Government Agency: Authority: Date of Order (MM/DD/YY): Date Demolition Ordered to Begin (MM/DD/YY): 15. FOR EMERGENCY RENOVATIONS (40 CFR 61, §61.145(a)(4)(iv)) Date and Hour of Emergency (MM/DD/YY - HH:MM): Description of the Sudden, Unexpected Event: Explanation of how the event caused unsafe conditions or would cause equipment damage or an unreasonable financial burden:

16. In the event that unexpected RACM is found or discovered or CATEGORY I or CATEGORY II NONFRIABLE ACM becomes crumbled, pulverized, or

reduced to powder the following procedures will be followed: Stop Work, Notify Owner, Revise Notification , Follow 40 CFR 61, §61.145(c) Procedures with an AHERA Certified Contractor/Supervisor on-site.

17. I CERTIFY THAT AT LEAST ONE AHERA CERTIFIED CONTRACTOR/SUPERVISOR WILL SUPERVISE THE STRIPPING AND REMOVAL OF RACM DESCRIBED IN THIS NOTIFICATION AND THAT THE TRAINING CERTIFICATE WILL BE POSTED OR READILY AVAILABLE ON-SITE.

__________________________________ __________________________ __________________________________ ________________________ (Print Name: Owner/Operator) (Title) (Signature of Owner/Operator) (Date) 18. CERTIFICATION OF INSPECTION BY AN AHERA CERTIFIED ASBESTOS BUILDING INSPECTOR (All areas of Arizona): __________________________________ __________________________ __________________________________ ________________________ (Print Name of Inspector) (Training Provider) (AHERA Certificate Number) (Expiration Date) 19. I CERTIFY THAT THE ABOVE INFORMATION IS CORRECT: Company Name:____________________________________ __________________________________ __________________________ __________________________________ ________________________ (Print Name: Owner/Operator) (Title) (Signature of Owner/Operator) (Date)

References: Title 40, Code of Federal Regulations, Part 61, Subpart M, Asbestos NESHAP §61.145(b): Arizona Revised Statutes. Title 49 §49-421 & 471 et. seq.: and Arizona Administrative Code. Title 18, Chapter 2, Air Pollution Control, Article II. §R18-2-1101. For more information, contact the Asbestos NESHAP Program in Arizona at (800) 234-5677 x2333 x4553. Revised: January 2015: Page 2 of 2

No ACMs present at the site.

Demolition of concrete structures using heavy equipment

n/a

n/a

n/a

n/a

Matt Hoffman Vice President Environmental July 1, 2021

Chad VanMoorlenhem The Asbestos Institute ON-4644-8088-031121 March 11, 2022

Matt Hoffman Vice President Environmental July 1, 2021

Western Utility Contractors, LLC dba Overley's Est 1959

Limited NESHAP Asbestos Inspection Report of Findings

Submitted To:

Project Site:

12903 Kloss Avenue Humboldt, Arizona 86329

Date of Report:

June 30, 2021

Project ID# 21-151

All MATERIALS TESTED AT THIS SITE ARE NEGATIVE FOR ASBESTOS CONTENT

This report is intended for the sole use of the addressed parties only. Any changes are strictly prohibited. Unless this report is a full comprehensive study of the entire site, all non-sampled materials are assumed to be asbestos until sampling can eliminate or confirm the presence, location, quantity, and condition.

TABLE OF CONTENTS 1.0 Client Information 2.0 Scope of Work, Location, Site Map and Photos, Building Information 3.0 Summary of Findings 4.0 Recommendations 5.0 Notification Requirements 6.0 NESHAP Information Page for EPA Notification 7.0 Sampling Information and Table Abbreviations 8.0 Lab Analysis Information 9.0 Description of Method Used for Sampling 10.0 Conclusions/Special Notes Attachments Attachment A: Inspector(s) Certification Attachment B: Laboratory Report Attachment C: Sample Location Map (Optional)

1.0 CLIENT/REPORT ISSUED TO:

Mr. Matt Hoffman Vice President Environmental Overley’s

2.0 THE PARTIES AGREED TO THE FOLLOWING SCOPE OF WORK:

Phoenix Environmental Group, LLC. conducted an asbestos inspection with limitations to include sampling and analysis of suspect building materials as identified as part of the scheduled demolition/renovation activity to be conducted at this facility. The age of construction was not known at the time of this inspection and only materials identified herein were sampled. All work was done under the terms of an authorization to proceed. The scope of work (sampling) and site access was provided by Mr. Matt Hoffman of Overley’s. Only the materials identified in this report were assessed, categorized, tested, and analyzed for asbestos-content. This report represents the results of the materials sampled at: 12903 Kloss Avenue Humboldt, Arizona 86329 Site Location/Vicinity Map:

Aerial View/Site Boundaries:

1

2

3

Site Photographs:

Photo 1 – Area 1 Photo 2 – Area 2

Photo 3 – Coating/Paint on Slab Photo 4 – Fiberboard/General Debris

BUILDING/SITE INFORMATION:

Residential or Commercial: Commercial

Age of Construction: Unknown

Building Usage: Commercial Vacant Land Area(s) / Building(s) Included: Limited screening of areas identified in the boundary.

Number of Floors: 1

Approximate Square Footage of Building or Scope Area & Building/Site Layout:

Preliminary Floor Plan or Demolition Plan Provided by GC/Owner:

Not Provided

3.0 SUMMARY OF FINDINGS:

Asbestos/ACBM Identified: None.

RACM Identified: None.

Damaged ACM or Damaged ACBM Identified: None.

Homogeneous Materials Sampled and Included in this Report:

Refer to Section 7. Sample location page

The inspection of this site was conducted on June 25, 2021. A total of 9 samples were collected from assessable areas of this site and analyzed for asbestos content. The following materials tested positive for asbestos content above 1.0% asbestos: None.

Material/HA Verified Location

Approx. Quantity

NESHAP Category

(If disturbed)

OSHA Class

None NA NA NA NA

The following materials were assumed positive for asbestos content above 1.0% asbestos: None. The following materials contain less than 1% asbestos: None. The following materials were specifically excluded: Materials not assessable at the time of our inspection. Materials not listed in this report are suspect. All quantities are measurements provided by our firm and shall not be used for bidding purposes. Contractors and Owners should field verify before submitting estimates.

4.0 RECOMMENDATIONS: It is our recommendation that all positive materials or any assumed positive materials, that are part of the planned renovation/demolition of this site should be properly abated by a licensed abatement contractor prior to any demolition or renovation where the material(s) have or will become damaged in anyway. All abatement work shall comply with OSHA and EPA regulations and the work needs to be completed by an Arizona licensed contractor utilizing AHERA certified personal. An AHERA certified project designer should also write the scope of work and conduct oversight and sampling during all phases of abatement. 5.0 NOTIFICATION REQUIRMENTS: Does your Renovation qualify for a NESHAP Notification? Any regulated demolition activity, except on an exempt facility, will require a proper notification to the proper agency. Demolition means the wrecking or taking out of any load-supporting structural member of a facility together with any related handling operations or the intentional burning of any facility. Renovation (abatement) of a nonexempt facility only requires a notification if the project exceeds certain size thresholds. Renovation includes facility modifications that do not amount to a demolition. A notification is only required if the renovation project will disturb RACM, or likely RACM, that exceeds certain quantities, namely:

• 260 linear feet on pipes • 160 square feet on other building components • 35 cubic feet of removed material. •

Contact ADEQ for the proper NESHAP notification form and fee requirements. Contact the local City or County for information and requirements on obtaining a demo permit.

6.0 NESHAP INFORMATION PAGE:

SITE ADDRESS: 12903 Kloss Avenue, Humboldt, Arizona 86329 NUMBER of BUILDINGS/SUITES/AREAS: 3 NUMBER OF FLOORS: One BUILDING OR AREA SIZE (SF): 32,906 SF DATE OF THIS INSPECTION: June 25, 2021 TOTAL NUMBER OF SAMPLES COLLECTED: 9 NVLAB LAB NAME: Lindus DATE SAMPLES ANALYZED: June 30, 2021 NVLAP CODE: 600113-0 A.D.H.S. #: NA A.P.N. #: Unknown DATE OF CONSTRUCTION: Unknown BUILDING USE: Commercial Vacant Land AMOUNT OF RACM IDENTIFIED: 0 AMOUNT OF CAT I IDENTIFIED: 0 AMOUNT OF CAT II IDENTIFIED: 0 ASSUMED MATERIALS: 0 SAMPLED BY: Chad VanMoorlehem AHERA BUILDING INSPECTOR NUMBER: ON-4644-8088-031121 EXPIRATION DATE: March 11, 2022 TRAINING PROVIDER: Asbestos Institute

7.0 SAMPLING INFORMATION: The following materials were sampled and analyzed pursuant to the scope of work identified at the time of our inspection:

Sample #

Material/HA Approx. Sample Location

Friable/Non

NESHAP Category

OSHA Class

LAB Results

1 Concrete See Location Map NA NA NA Negative 2 Concrete See Location Map NA NA NA Negative 3 Concrete See Location Map NA NA NA Negative 4 Fiberboard See Location Map NA NA NA Negative 5 Fiberboard See Location Map NA NA NA Negative 6 Fiberboard See Location Map NA NA NA Negative 7 Slab with Paint See Location Map NA NA NA Negative 8 Slab with Paint See Location Map NA NA NA Negative 9 Slab with Paint See Location Map NA NA NA Negative

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4-6

Abbreviations and Acronyms Used in this Report: NA: Not Applicable because sample/material tested negative. HA: Homogeneous Area/Material/Sample Number. Cat I: Category I Cat II: Category II RACM: Regulated Asbestos Containing Material F: Friable NF: Non-Friable Materials listed in Red are positive for asbestos content above 1.5%. Materials under 10% should be confirmed by point-count analysis. OSHA Class of Work Definitions:

▪ Class I asbestos work is the most potentially hazardous class of asbestos jobs. This work involves the removal of asbestos-containing thermal system insulation and sprayed-on or troweled-on surfacing materials. Employers must presume that thermal system insulation and surfacing material found in pre-1981 construction is ACM. That presumption, however, is rebuttable. If you believe that the surfacing material or thermal system insulation is not ACM, the OSHA standard specifies the means that you must use to rebut that presumption. Thermal system insulation includes ACM applied to pipes, boilers, tanks, ducts, or other structural components to prevent heat loss or gain. Surfacing materials include decorative plaster on ceilings and walls; acoustical materials on decking, walls, and ceilings; and fireproofing on structural members.

▪ Class II work includes the removal of other types of ACM that are not thermal system insulation such as resilient flooring and roofing materials. Examples of Class II work include removal of asbestos-containing floor or ceiling tiles, siding, roofing, or transite panels.

▪ Class III asbestos work includes repair and maintenance operations where ACM or presumed ACM (PACM) are disturbed.

▪ Class IV work includes custodial activities where employees clean up asbestos-containing waste and debris produced by construction, maintenance, or repair activities. This work involves cleaning dust-contaminated surfaces, vacuuming contaminated carpets, mopping floors, and cleaning up ACM or PACM from thermal system insulation.

Less than 1% Asbestos (>1%):

▪ 29 CFR 1926.1101(g)(1)(ii), which requires: wet methods, or wetting agents, to control employee exposures during asbestos handling, mixing, removal, cutting, application, and cleanup, except where employers demonstrate that the use of wet methods is infeasible due to, for example, the creation of electrical hazards, equipment malfunction, and, in roofing, except as provided in paragraph (g)(8)(ii)2 of this section;

▪ 29 CFR 1926.1101(g)(1)(iii), which requires: prompt clean-up and disposal of wastes and debris contaminated with asbestos in leak-tight containers except in roofing operations, where the procedures specified in paragraph (g)(8)(ii)3 of this section apply;

▪ 29 CFR 1926.1101(g)(3)(i), which prohibits: high-speed abrasive disc saws that are not equipped with point-of-cut ventilator or enclosures with HEPA filtered exhaust air.

▪ 29 CFR 1926.1101(g)(3)(ii), which prohibits: compressed air used to remove asbestos, or materials containing asbestos, unless the compressed air is used in conjunction with an enclosed ventilation system designed to capture the dust cloud created by the compressed air; and

▪ 29 CFR 1926.1101(g)(3)(iv), which prohibits: employee rotation as a means of reducing employee exposure to asbestos.

https://www.osha.gov/laws-regs/standardinterpretations/2003-11-24-0#footnote2

https://www.osha.gov/laws-regs/standardinterpretations/2003-11-24-0#footnote3

There are also some other provisions that apply to work activities involving installed construction materials even where the material does not contain >1% asbestos. However, if neither asbestos PEL is exceeded, only the following few provisions apply:

▪ 29 CFR 1926.1101(f)(2)(i), the provision for establishing that neither asbestos PEL is exceeded: Each employer who has a workplace or work operation covered by this standard shall ensure that a "competent person" conducts an exposure assessment immediately before or at the initiation of the operation to ascertain expected exposures during that operation or workplace. The assessment must be completed in time to comply with requirements which are triggered by exposure data or the lack of a "negative exposure assessment," and to provide information necessary to assure that all control systems planned are appropriate for that operation and will work properly;

▪ 29 CFR 1926.1101(f)(6)(i), a provision covering the observation of monitoring: The employer shall provide affected employees and their designated representatives an opportunity to observe any monitoring of employee exposure to asbestos conducted in accordance with this section;

▪ 29 CFR 1926.1101(f)(5)(i), a provision covering employee notification of monitoring results: The employer shall notify affected employees of the monitoring results that represent that employee's exposure as soon as possible following receipt of monitoring results.

▪ 29 CFR 1926.1101(f)(5)(ii), another provision covering employee notification of monitoring results: The employer shall notify affected employees of the results of monitoring representing the employee's exposure in writing either individually or by posting at a centrally located place that is accessible to affected employees; and

▪ 29 CFR 1926.1101(n)(2)(i)-(iii), a set of provisions covering recordkeeping for measurements of exposures to airborne asbestos.

EPA NESHAP Definitions: Category I nonfriable asbestos-containing material (ACM) means asbestos containing packings, gaskets, resilient floor covering, and asphalt roofing products containing more than 1 percent asbestos as determined using the method specified in appendix E, subpart E, 40 CFR part 763, section 1, Polarized Light Microscopy. Category II nonfriable ACM means any material, excluding Category I nonfriable ACM, containing more than 1 percent asbestos as determined using the methods specified in appendix E, subpart E, 40 CFR part 763, section 1, Polarized Light Microscopy that, when dry, cannot be crumbled, pulverized, or reduced to powder by hand pressure. Regulated asbestos-containing material (RACM) means (a) Friable asbestos material, (b) Category I nonfriable ACM that has become friable, (c) Category I nonfriable ACM that will be or has been subjected to sanding, grinding, cutting, or abrading, or (d) Category II nonfriable ACM that has a high probability of becoming or has become crumbled, pulverized, or reduced to powder by the forces expected to act on the material in the course of demolition or renovation operations regulated by this subpart. Remove means to take out RACM or facility components that contain or are covered with RACM from any facility. Renovation means altering a facility or one or more facility components in any way, including the stripping or removal of RACM from a facility component. Operations in which load-supporting structural members are wrecked or taken out are demolitions.

Assumed ACM means the building material was reported by the PLM analysis method to contain less than 1 % asbestos-content and will be assumed as an asbestos-containing material (ACM). 8.0 LABORATORY ANALYSIS INFORMATION:

During our site investigation of this property, and at the request of our client, bulk samples were collected and analyzed for asbestos content. The samples were analyzed by an accredited laboratory pursuant to Polarized Light Microscopy (PLM) EPA, Method 600/R-63/116 and M600/M4-82-020. request.

9.0 DESCRIPTION OF THE METHOD USED FOR SAMPLING: When possible, friable bulk material samples were collected from a statistically random manner that is representative of the homogeneous area. Non-friable material samples were also collected randomly but may have been collected conveniently depending on the location of the sample/material. Fiberglass, foam glass, rubber, steel, wood or other non-ACM are usually excluded from bulk sampling and not part of our scope of work. Only materials listed within the body of this report were tested. It is possible that there could be material(s) hidden, covered, not assessable and therefore not sampled due to the limitations of this report. Materials such as mastic under flooring, sub floors, behind concealed spaces, vermiculite in walls, pipe and duct insulation, above ceiling materials, below ground and many more materials could be located within the building and not sampled herein because of access and/or limitations etc. This also applies to roofing and roofing layers and multi flooring layers. A certified building inspector conducted all the sampling at this site in accordance with applicable regulations. 10.0 CONCLUSIONS/SPECIAL NOTES: This report must be kept on site during all phases of demolition or renovation. If you intend on doing any structural demo, or removal of any RACM or the removal of any Cat I or II materials that will become RACM during your work, and if this site falls under the rules of a facility, then you must submit a National Emission Standards for Hazardous Air Pollutants (NESHAP) permit. This site will require a NESHAP permit if any structural components are to be removed during demolition. Should any unidentified materials not specifically listed in this report become disturbed in a manner that causes the material to become damaged as part of this project you shall stop, sample, and notify prior to any disturbance. REPORT CERTIFIED BY:

Chad VanMoorlehem Authorized Signature Phoenix Environmental Group, LLC. AHERA Certified Building Inspector

Phoenix Environmental Group, LLC. 7755 East Redfield Road, Suite 600, Scottsdale, AZ 85260

Appendix A


Attachment B

Lab Report

Summary Report

AECOM

Appendix C Soil Laboratory Analytical Report and Data Usability Summary

ANALYTICAL REPORTAugust 06, 2021

Chevron AECOM - AZ

Sample Delivery Group: L1383311

Samples Received: 07/28/2021

Project Number: 60662030

Description: Chevron-Dewey/Humboldt

Report To: Andrew Messer

333 E. Wetmore Rd.

Suite 400

Tucson, AZ 85705

Entire Report Reviewed By:

August 06, 2021

[Preliminary Report]

Brian FordPro ject Manager

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

Pace Analytical National12065 Lebanon Rd Mount Ju l ie t , TN 37122 615 -758-5858 800-767-5859 www.pacenat iona l . com

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ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE:

Chevron AECOM - AZ 60662030 L1383311 08/06/21 11:40 1 of 31

August 06, 2021

Brian FordPro ject Manager



https://www.pacenational.com

mailto:[email protected];[email protected];[email protected]?subject=Pace Analytical National SDG: L1383311 - PN: 60662030&body=Email regarding SDG: L1383311 - Project Number: 60662030

mailto:[email protected]?subject=Pace Analytical National SDG: L1383311&body=Email regarding SDG: L1383311

https://www.pacenational.com


TABLE OF CONTENTS

Cp: Cover Page 1

Tc: Table of Contents 2

Ss: Sample Summary 3

Cn: Case Narrative 6

Sr: Sample Results 7

16-2-S-NE_210727 L1383311-01 7

16-2-S-SE_210727 L1383311-02 8

16-2-S-SW_210727 L1383311-03 9

16-2-S-NW_210727 L1383311-04 10

16-2-B-N_210727 L1383311-05 11

16-2-B-E_210727 L1383311-06 12

16-2-B-S_210727 L1383311-07 13

16-2-B-W_210727 L1383311-08 14

36-2-S-NE_210727 L1383311-09 15

36-2-S-SE_210727 L1383311-10 16

36-2-S-SW_210727 L1383311-11 17

36-2-S-NW_210727 L1383311-12 18

36-2-B-N_210727 L1383311-13 19

36-2-B-E_210727 L1383311-14 20

36-2-B-S_210727 L1383311-15 21

36-2-B-W_210727 L1383311-16 22

FB-210727 L1383311-17 23

DUP-1_210727 L1383311-18 24

DUP-2_210727 L1383311-19 25

Qc: Quality Control Summary 26

Metals (ICP) by Method 6010B 26

Metals (ICP) by Method 6010D 27

Gl: Glossary of Terms 28

Al: Accreditations & Locations 29

Sc: Sample Chain of Custody 30

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SAMPLE SUMMARY

Collected by Collected date/time Received date/time

16-2-S-NE_210727 L1383311-01 Solid Matt Anonsen 07/27/21 10:15 07/28/21 08:00

Method Batch Dilution Preparation Analysis Analyst Location

date/time date/time

Metals (ICP) by Method 6010D WG1713893 1 08/04/21 07:01 08/06/21 07:49 CCE Mt. Juliet, TN


16-2-S-SE_210727 L1383311-02 Solid Matt Anonsen 07/27/21 10:30 07/28/21 08:00


date/time date/time



16-2-S-SW_210727 L1383311-03 Solid Matt Anonsen 07/27/21 10:43 07/28/21 08:00


date/time date/time



16-2-S-NW_210727 L1383311-04 Solid Matt Anonsen 07/27/21 10:56 07/28/21 08:00


date/time date/time



16-2-B-N_210727 L1383311-05 Solid Matt Anonsen 07/27/21 11:15 07/28/21 08:00


date/time date/time



16-2-B-E_210727 L1383311-06 Solid Matt Anonsen 07/27/21 11:28 07/28/21 08:00


date/time date/time



16-2-B-S_210727 L1383311-07 Solid Matt Anonsen 07/27/21 11:43 07/28/21 08:00


date/time date/time



16-2-B-W_210727 L1383311-08 Solid Matt Anonsen 07/27/21 11:55 07/28/21 08:00


date/time date/time


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SAMPLE SUMMARY


36-2-S-NE_210727 L1383311-09 Solid Matt Anonsen 07/27/21 12:17 07/28/21 08:00


date/time date/time

Metals (ICP) by Method 6010D WG1713893 1 08/04/21 07:01 08/06/21 07:29 RDS Mt. Juliet, TN


36-2-S-SE_210727 L1383311-10 Solid Matt Anonsen 07/27/21 12:29 07/28/21 08:00


date/time date/time



36-2-S-SW_210727 L1383311-11 Solid Matt Anonsen 07/27/21 12:46 07/28/21 08:00


date/time date/time



36-2-S-NW_210727 L1383311-12 Solid Matt Anonsen 07/27/21 12:58 07/28/21 08:00


date/time date/time



36-2-B-N_210727 L1383311-13 Solid Matt Anonsen 07/27/21 13:12 07/28/21 08:00


date/time date/time



36-2-B-E_210727 L1383311-14 Solid Matt Anonsen 07/27/21 13:28 07/28/21 08:00


date/time date/time



36-2-B-S_210727 L1383311-15 Solid Matt Anonsen 07/27/21 13:45 07/28/21 08:00


date/time date/time



36-2-B-W_210727 L1383311-16 Solid Matt Anonsen 07/27/21 14:02 07/28/21 08:00


date/time date/time


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SAMPLE SUMMARY


FB-210727 L1383311-17 GW Matt Anonsen 07/27/21 12:05 07/28/21 08:00


date/time date/time

Metals (ICP) by Method 6010B WG1715506 1 08/02/21 11:48 08/02/21 22:33 EL Mt. Juliet, TN


DUP-1_210727 L1383311-18 Solid Matt Anonsen 07/27/21 00:00 07/28/21 08:00


date/time date/time



DUP-2_210727 L1383311-19 Solid Matt Anonsen 07/27/21 00:00 07/28/21 08:00


date/time date/time


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CASE NARRATIVE

All sample aliquots were received at the correct temperature, in the proper containers, with the appropriate preservatives, and within method specified holding times, unless qualified or notated withinthe report. Where applicable, all MDL (LOD) and RDL (LOQ) values reported for environmental sampleshave been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data.

[Preliminary Report]

Brian FordPro jec t Manager

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Brian FordPro jec t Manager





SAMPLE RESULTS - 01L 1 3 8 3 3 1 1

16-2-S-NE_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 0 : 1 5

Metals (ICP) by Method 6010D

Result Qualifier RDL Dilution Analysis Batch

Analyte mg/kg mg/kg date / time

Lead 201 0.500 1 08/06/2021 07:49 WG1713893

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16-2-S-SE_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 0 : 3 0




Lead 37.7 0.500 1 08/06/2021 07:58 WG1713893

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16-2-S-SW_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 0 : 4 3




Lead 206 0.500 1 08/06/2021 08:01 WG1713893

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16-2-S-NW_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 0 : 5 6




Lead 23.0 0.500 1 08/06/2021 08:04 WG1713893

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16-2-B-N_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 1 : 1 5




Lead 58.5 0.500 1 08/06/2021 08:07 WG1713893

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16-2-B-E_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 1 : 2 8




Lead 107 0.500 1 08/06/2021 08:10 WG1713893

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16-2-B-S_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 1 : 4 3




Lead 69.0 0.500 1 08/06/2021 08:13 WG1713893

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16-2-B-W_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 1 : 5 5




Lead 27.0 0.500 1 08/06/2021 08:16 WG1713893

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36-2-S-NE_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 2 : 1 7




Lead 10.2 M1 R5 0.500 1 08/06/2021 07:29 WG1713893

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36-2-S-SE_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 2 : 2 9




Lead 128 0.500 1 08/06/2021 08:19 WG1713893

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36-2-S-SW_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 2 : 4 6




Lead 81.7 0.500 1 08/06/2021 08:22 WG1713893

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36-2-S-NW_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 2 : 5 8




Lead 52.8 0.500 1 08/06/2021 08:25 WG1713893

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36-2-B-N_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 3 : 1 2




Lead 46.7 0.500 1 08/06/2021 08:33 WG1713893

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36-2-B-E_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 3 : 2 8




Lead 22.6 0.500 1 08/06/2021 08:36 WG1713893

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36-2-B-S_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 3 : 4 5




Lead 44.1 0.500 1 08/06/2021 08:39 WG1713893

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36-2-B-W_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 4 : 0 2




Lead 29.4 0.500 1 08/06/2021 08:42 WG1713893

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FB-210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 1 2 : 0 5

Metals (ICP) by Method 6010B


Analyte ug/l ug/l date / time

Lead ND 6.00 1 08/02/2021 22:33 WG1715506

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DUP-1_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 0 0 : 0 0




Lead 36.2 0.500 1 08/06/2021 08:45 WG1713893

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DUP-2_210727C o l l e c t e d d a t e / t i m e : 0 7 / 2 7 / 2 1 0 0 : 0 0




Lead 9.12 0.500 1 08/06/2021 08:49 WG1713893

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QUALITY CONTROL SUMMARYWG1715506M e t a l s ( I C P ) b y M e t h o d 6 0 1 0 B L 1 3 8 3 3 1 1 - 1 7

Method Blank (MB)

(MB) R3686877-1 08/02/21 21:34

MB Result MB Qualifier MB MDL MB RDL

Analyte ug/l ug/l ug/l

Lead U 2.99 6.00

Laboratory Control Sample (LCS)

(LCS) R3686877-2 08/02/21 21:37

Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier

Analyte ug/l ug/l % %

Lead 1000 1000 100 80.0-120

L1383184-01 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)

(OS) L1383184-01 08/02/21 21:40 • (MS) R3686877-4 08/02/21 21:46 • (MSD) R3686877-5 08/02/21 21:49

Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits

Analyte ug/l ug/l ug/l ug/l % % % % %

Lead 1000 6.66 1030 1040 103 103 1 75.0-125 0.438 20

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QUALITY CONTROL SUMMARYWG1713893M e t a l s ( I C P ) b y M e t h o d 6 0 1 0 D L 1 3 8 3 3 1 1 - 0 1 , 0 2 , 0 3 , 0 4 , 0 5 , 0 6 , 0 7 , 0 8 , 0 9 , 1 0 , 1 1 , 1 2 , 1 3 , 1 4 , 1 5 , 1 6 , 1 8 , 1 9

Method Blank (MB)

(MB) R3688665-1 08/06/21 07:23

MB Result MB Qualifier MB MDL MB RDL

Analyte mg/kg mg/kg mg/kg

Lead U 0.208 0.500

Laboratory Control Sample (LCS)

(LCS) R3688665-2 08/06/21 07:26

Spike Amount LCS Result LCS Rec. Rec. Limits LCS Qualifier

Analyte mg/kg mg/kg % %

Lead 100 95.0 95.0 80.0-120

L1383311-09 Original Sample (OS) • Matrix Spike (MS) • Matrix Spike Duplicate (MSD)

(OS) L1383311-09 08/06/21 07:29 • (MS) R3688665-5 08/06/21 07:37 • (MSD) R3688665-6 08/06/21 07:40

Spike Amount Original Result MS Result MSD Result MS Rec. MSD Rec. Dilution Rec. Limits MS Qualifier MSD Qualifier RPD RPD Limits

Analyte mg/kg mg/kg mg/kg mg/kg % % % % %

Lead 100 10.2 161 121 151 111 1 75.0-125 M1 R5 28.5 20

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GLOSSARY OF TERMS

Guide to Reading and Understanding Your Laboratory Report

The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not intended as a comprehensive explanation, and if you have additional questions please contact your project representative.

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

Abbreviations and Definitions

MDL Method Detection Limit.

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

RDL Reported Detection Limit.

Rec. Recovery.

RPD Relative Percent Difference.

SDG Sample Delivery Group.

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

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

Dilution

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

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

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

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

Result

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

Uncertainty (Radiochemistry) Confidence level of 2 sigma.

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

Quality Control Summary (Qc)

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

Sample Chain of Custody (Sc)

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

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

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

Qualifier Description

M1 Matrix spike recovery was high, the method control sample recovery was acceptable.

R5 MS/MSD RPD exceeded the laboratory acceptance limit. Recovery met acceptance criteria.

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Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122Alabama 40660 Nebraska NE-OS-15-05

Alaska 17-026 Nevada TN000032021-1

Arizona AZ0612 New Hampshire 2975

Arkansas 88-0469 New Jersey–NELAP TN002

California 2932 New Mexico ¹ TN00003

Colorado TN00003 New York 11742

Connecticut PH-0197 North Carolina Env375

Florida E87487 North Carolina ¹ DW21704

Georgia NELAP North Carolina ³ 41

Georgia ¹ 923 North Dakota R-140

Idaho TN00003 Ohio–VAP CL0069

Illinois 200008 Oklahoma 9915

Indiana C-TN-01 Oregon TN200002

Iowa 364 Pennsylvania 68-02979

Kansas E-10277 Rhode Island LAO00356

Kentucky ¹ ⁶ KY90010 South Carolina 84004002

Kentucky ² 16 South Dakota n/a

Louisiana AI30792 Tennessee ¹ ⁴ 2006

Louisiana LA018 Texas T104704245-20-18

Maine TN00003 Texas ⁵ LAB0152

Maryland 324 Utah TN000032021-11

Massachusetts M-TN003 Vermont VT2006

Michigan 9958 Virginia 110033

Minnesota 047-999-395 Washington C847

Mississippi TN00003 West Virginia 233

Missouri 340 Wisconsin 998093910

Montana CERT0086 Wyoming A2LA

A2LA – ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789

A2LA – ISO 17025 ⁵ 1461.02 DOD 1461.01

Canada 1461.01 USDA P330-15-00234

EPA–Crypto TN00003

ACCREDITATIONS & LOCATIONS

¹ Drinking Water ² Underground Storage Tanks ³ Aquatic Toxicity ⁴ Chemical/Microbiological ⁵ Mold ⁶ Wastewater n/a Accreditation not applicable

* Not all certifications held by the laboratory are applicable to the results reported in the attached report.

* Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical.

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https://www.pacenational.com/technical/accreditations

Data Usability Summary

Chevron Dewey-Humboldt Site – DUS for Lab Report Number L1383311 1


Date: August 18, 2021 To: Wally Gilmore, AECOM From: Ruth Parks, AECOM Subject: Data Usability Summary for Review of Soil Data

Laboratory Report Number L1383311 Chevron Dewey-Humboldt Site in Dewey-Humboldt, Arizona


Data from Pace Analytical Services Inc. in Mount Juliet, Tennessee was reviewed for the analysis of samples collected from July 27, 2021 at the Chevron Dewey-Humboldt Site in Dewey-Humboldt, Arizona. Pace holds Arizona laboratory accreditation AZ0612 in Mount Juliet, Tennessee for the matrices, methods, and analytes associated with this project. Data were reviewed for conformance to the requirements of SW-846 Test Methods for Evaluating

Solid Waste Physical/Chemical Methods (SW-846). The purpose of this sampling event was to provide current data on concentrations of potential chemicals of concern (COCs) in soil for the Chevron Dewey-Humboldt Site. Samples were analyzed using: • SW-846 6010D – Inductively Coupled Plasma – Mass Spectrometry Data were reviewed and the results are discussed in this Data Usability Summary (DUS). The reportable data, quality control results, sample receipt checklist and chain-of-custody (C-O-C) records were examined for laboratory report L1383311. Introduction

Soil samples and field duplicates were analyzed for lead as requested on the chain-of-custodies (C-O-C). Table B-1 lists the sample identifications cross-referenced to the laboratory identifications.

Analytical Results

No data were qualified. Preservation and Holding Times

All samples were evaluated for agreement with the chain-of-custody (C-O-C). Sample bottles were received in good condition and within the temperature acceptance criteria of < 6 oC. Samples were prepared and analyzed within the holding times specified in SW-846 Table 2-40.

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Calibrations

Calibration data were not submitted in this package and are not part of the standard deliverable. Blanks

Target analytes were not detected in the field blank or method blanks. Laboratory Control Samples

Samples with laboratory control sample (LCS) recoveries (%R) outside of laboratory specifications are qualified as “JL” and “UJL” when below specifications and as “JH” when above specifications and listed in Table B-2. If a laboratory control sampled duplicate (LCSD) was analyzed, data with duplicate precision (as relative percent difference [RPD]) outside of laboratory acceptance criteria is qualified as “J” for LCS precision and listed in Table B-2. Matrix Spike (MS)/Matrix Spike Duplicates (MSD)

Non-project sample data were not evaluated. Data with MS/MSD recoveries outside of laboratory specifications are qualified as “JL” for detections and “UJ” for non-detects when below specifications and “JH” when above specifications and listed in Table B-2. Sample data with MS/MSD precision (RPD) outside of the laboratory acceptance criteria are qualified as “J” for MS/MSD precision and listed in Table B-2.

Field Precision

Precision results for replicate and duplicate samples are summarized in Table B-3. Duplicate precision was not calculated for analytes which were reported as non-detect (U) or qualified as “U” in Table B-2. Analytes with non-detect results for both replicate and duplicate were not listed in the table. Field sample and sample duplicate analytes with RPD results outside of the acceptance criteria of < 50 % RPD for soil are qualified as estimated “J” and listed in Table B-2.

Summary

Soil analytical data are usable for the purpose of determining concentrations of lead in samples.




Tables

Table B-1. Cross-Reference Field Sample Identifications and Laboratory Identifications

Field Identification Laboratory Identification Comment

16-2-S-NE_210727 L1383311-01

16-2-S-SE_210727 L1383311-02

16-2-S-SW_210727 L1383311-03

16-2-S-NW_210727 L1383311-04

16-2-B-N_210727 L1383311-05

16-2-B-E_210727 L1383311-06

16-2-B-S_210727 L1383311-07

16-2-B-W_210727 L1383311-08

36-2-S-NE_210727 L1383311-09 MS/MSD

36-2-S-SE_210727 L1383311-10

36-2-S-SW_210727 L1383311-11

36-2-S-NW_210727 L1383311-12

36-2-B-N_210727 L1383311-13

36-2-B-E_210727 L1383311-14

36-2-B-S_210727 L1383311-15

36-2-B-W_210727 L1383311-16

FB-210727 L1383311-17 Field Blank

DUP-1_210727 L1383311-18 Duplicate of 16-2-B-N_210727

DUP-2_210727 L1383311-19 Duplicate of 36-2-S-NE_210727

Table B-2. Qualified Analytical Data

Field Identification Analyte Qualification Reason for Qualification

* No Data Qualified.




Table B-3. Field Precision

Field Identification Analyte Sample Result

Duplicate Result RPD Qualified

16-2-B-N_210727 / DUP-1_210727 Lead 58.5 36.2 47.1 A

36-2-S-NE_210727 / DUP-2_210727 Lead 10.2 9.12 11.2 A

RPD = ((SR-DR)*200)/(SR+DR) A – Acceptable data A* – Acceptable data since absolute difference is < 2x MQL NA – Not applicable J – Estimated data due to inability to meet QC criteria U – Analyte not detected U* – Analyte qualified as non-detect per Table B-2


Summary Report

AECOM

Appendix D Soil Disposal Documentation

Summary Report

AECOM

aecom.com

report summary report 2021-10-29

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