9-Attachment C - Limited Asbestos Materials and CAM-17 Metals Assessment.pdf

LIMITED ASBESTOS MATERIALS AND CAM-17 METALS ASSESSMENT

Performed at

Eastern Metropolitan Water District S4144 Oliver Tank, located in Moreno Valley, CA, S4114 Quail Valley 1 Tank located in Menifee, CA, S4160 Quail Valley 2 tank located in Menifee, CA, and S9822 Benton Road Recycle Tank located in Winchester, CA.

Performed on August 5, 2025

Submitted to

LaMikea Thewes Assets and Facilities Manager

Eastern Municipal Water District 2270 Trumble Road

Perris, CA 92570

HSA Project Number 250190LA

August 21, 2025

Prepared By:

Devin S. Berman, IH, CAC, CDPH I/A Industrial Hygienist/Project Manager

Reviewed By:

Joel I. Berman, CIH, CSP, CAC, CIAQM, CDPH I/A/PM President

TABLE OF CONTENTS

Page

TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Executive Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

1.0 INTRODUCTION

2.0 METHODOLOGY

3.0 STANDARDS AND GUIDELINES

4.0 RESULTS

5.0 RECOMMENDATIONS

TABLE IA - CAM 17 Sampling Results for Metals - Oliver Tank

TABLE IB - CAM 17 Sampling Results for Metals - Quail Valley 1

TABLE IC - CAM 17 Sampling Results for Metals - Quail Valley 2

TABLE ID - CAM 17 Sampling Results for Metals - Benton Road Recycle Tank

Table IIA - Bulk Asbestos Sampling Results - Oliver Tank

Table IIB - Bulk Asbestos Sampling Results - Quail Valley 1

Table IIC - Bulk Asbestos Sampling Results - Quail Valley 2

Table IID - Bulk Asbestos Sampling Results - Benton Road Recycle Tank Appendix A - Laboratory Reports Appendix B - Laboratory Asbestos Certification Appendix C - Figure Appendix D - Photo Exhibit Appendix E - Licenses

Page ii - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com

Executive Summary

Pursuant to the request of LaMikea Thewes, Eastern Municipal Water District, Health Science Associates (HSA) performed a limited asbestos materials and CAM-17 metals assessments of four Eastern Municipal Water District (EMWD) tank sites (S4144 Oliver Tank, located in Moreno Valley, CA; S4114 Quail Valley 1 Tank located in Menifee, CA; S4160 Quail Valley 2 tank located in Menifee, CA; and S9822 Benton Road Recycle Tank located in Winchester, CA). This assessment was performed on August 5, 2025.

The purpose of the survey was to determine if asbestos abatement was required and if the paint on the tank surfaces have detectable levels of CAM-17 metals in accordance with the California Title 22, §66261.24 hazardous waste standards for metals prior to the and renovation and/or demolition of the sites.

During the August 5, 2025 site visit, HSA collected a total of 12 suspect bulk asbestos samples resulting in 14 analyses by layer. Sampling locations and materials were determined by Eastern Municipal Water District. Laboratory analysis determined that none of the materials sampled were either asbestos containing material (ACM) or asbestos containing construction material (ACCM) per polarized light microscopy (PLM) with dispersion staining analytical method. No further action is required at this time with regards to the sampled materials.

For this project, HSA collected 11 representative paint samples from the exterior surfaces of the subject tanks. Laboratory analysis determined that the following paint contained levels above the total threshold limit concentration (TTLC) criteria and is considered to be and must be disposed of as a hazardous waste in the State of California. Additionally , the paint could also fail the Toxicity Characteristic Leaching Procedure (TCLP) test. Therefore, the contractor, or in-house personnel, as part of the required waste characterization process should segregate all waste generated, such as but not limited to, paint chips, polyethylene sheeting, and personal protective equipment (PPE), during any work on these tanks into separate waste streams and samples shall be submitted to a laboratory for TCLP analysis to determine proper disposal and to meet local, state, and federal requirements.

• Quail Valley 2 - Yellow paint on handrail - Barium

• Quail Valley 1 - Beige paint on tank - Barium, Lead, and Zinc

• Quail Valley 1 - Light beige paint on tank - Barium, Lead, and Zinc

• Quail Valley 1 - Off-white paint on tank - Barium

• Quail Valley 1 - Yellow paint on piping - Zinc

• Benton Tank - Beige paint on tank - Zinc iii

Executive Summary Continued

• Oliver Tank - Yellow paint on piping - Zinc

• Oliver Tank - Paint used to cover graffiti - Zinc

Listed below are paint sample results that were below their respective TTLC levels, but could fail the Soluble Threshold Limit Concentration (STLC) test. Follow-up sampling and analysis will need to be performed prior to disposal by the contractor or in-house personnel as part of the required waste characterization process.

• Quail Valley 2 - Beige paint on tank - Barium, Chromium, Copper, and Nickel

• Oliver Tank - Beige paint on tank - Barium, Cadmium, and Zinc

• Oliver Tank - Dark beige paint on hatch - Zinc

Due to the nature, age, and use of the equipment/structure, hidden, or unknown suspect ACM/ACCM, lead, metals, or other hazardous materials may be uncovered during any future renovation/maintenance/demolition activities. Therefore, all contractors or in-house workers performing work on these sites should be informed of policies with regard to notifying management if previously unidentified suspect hazardous materials are discovered during the project.

This report was prepared for use by Eastern Municipal Water District in evaluating the subject location. The information contained within this report is as factual as possible and the opinions related herein are based on HSA’s experience in similar investigations. No warranty, therefore, is made to any persons other than Eastern Municipal Water District regarding the conclusions or recommendations included within this report. HSA will not release copies to a third party without prior written consent of Eastern Municipal Water District. For questions regarding this report, please contact us at HSA@healthscience.com.

iv

1.0 INTRODUCTION

1.1 Pursuant to the request of LaMikea Thewes, Eastern Municipal Water District, Health Science Associates (HSA) performed a limited asbestos materials and CAM-17 metals assessments of four Eastern Municipal Water District (EMWD) tank sites (S4144 Oliver Tank, located in Moreno Valley, CA; S4114 Quail Valley 1 Tank located in Menifee, CA; S4160 Quail Valley 2 tank located in Menifee, CA;

and S9822 Benton Road Recycle Tank located in Winchester, CA). This assessment was performed on August 5, 2025.

1.2 The purpose of the survey was to determine if asbestos abatement was required and if the paint on the interior wall had detectable levels of CAM-17 metals in accordance with the California Title 22, §66261.24 hazardous waste standards for metals prior to the sale of the Residence.

1.3 This project, project management, and report preparation were performed by Devin S. Berman, Industrial Hygienist (IH) California Certified Asbestos Consultant (CAC, 15-5418), California Department of Public Health (CDPH) Certified Lead Inspector/Assessor (I/A - LRC 00002357).

1.4 Senior project management and final report review were performed by Joel I.

Berman, Certified Industrial Hygienist (CIH), Certified Safety Professional (CSP), CAC (92-0838), Certified Indoor Air Quality Manager (CIAQM), CDPH Certified I/A (LRC 00003608) and Project Monitor (PM LRC 00003607), President.

1.5 The subject locations are stand alone water tanks enclosed behind gated areas.

The tanks are made of metal and were constructed on concrete slabs.

1.6 During the August 5, 2025 site visit, HSA collected a total of 12 suspect bulk asbestos samples resulting in 14 analyses by layer and 11 bulk paint chip sample.

Sampling locations and materials were determined by Eastern Municipal Water District.

2.0 METHODOLOGY

2.1 Asbestos

2.1.1 The collection of bulk samples from suspect asbestos containing materials (ACMs) was performed to determine if the sampled materials were either ACM, defined by the Environmental Protection Agency (EPA) as any material containing greater than one percent (>1%) asbestos, or asbestos containing construction material (ACCM), defined by the State of California as any construction material containing greater than 0.1

Page 1 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com percent (>0.1%) asbestos. In general, bulk sampling guidelines outlined in the Asbestos Hazard Emergency Response Act (AHERA) were followed, but actual sample locations and total number of samples were determined by the technician that conducted the survey.

2.1.2 The suspect asbestos samples were analyzed via polarized light microscopy (PLM) with dispersion staining in accordance with EPA method 600/R-93-116. The lower limit of reliable quantification for this method is 1%. When any trace level of asbestos was detected (often even one fiber) by the PLM analyst, the sample result were reported as “<1%,” i.e. ACCM, along with an identification of the type of asbestos that was detected. Subsequently, where ACCM was reported, further analysis via PLM 1000 point counting can be performed to quantify the asbestos levels down to 0.1%, the quantification limit where the material is considered non-asbestos containing for most regulatory purposes.

Point counting was not required for this survey.

2.2 CAM-17 Metals

The bulk paint sampling and analytical methodologies employed followed NIOSH, OSHA, EPA, and/or other professionally accepted sampling methods. The specific method is reported on the laboratory reports and sampling data sheets, which include chains-of-custody (COC) signatures.

2.3 Laboratory

After sample collection, all samples were transported via chains-of-custody procedures to LA Testing’s Huntington Beach California laboratory for analysis.

LA Testing is part of a larger, nation-wide laboratory organization known as EMSL. These laboratories maintain accreditations by the American Industrial Hygiene Association (AIHA), the National Voluntary Laboratory Accreditation Program (NVLAP), the California Department of Public Health Environmental Laboratory Accreditation Program (ELAP), and AIHA's Environmental Lead Laboratory Accreditation Program (ELLAP).

2.4 Exclusions/Limitations

2.4.1 This site and sampling investigation did not access hidden and unknown portions of the site or sample in areas where access was not granted by the Owner.

2.4.2 HSA’s scope of work for this evaluation did not include collection of samples for any other suspect hazardous materials (i.e. soil, ground

Page 2 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com water, etc.), which may or may not have been associated with the site or normal facility operations.

3.0 STANDARDS AND GUIDELINES

3.1 Asbestos

3.1.1 Asbestos Containing Material (ACM) - Any material containing more than one percent (>1%) asbestos, as defined by the EPA.

3.1.2 Asbestos Containing Construction Material (ACCM) - Any manufactured construction material which contains more than one-tenth of one percent (>0.1%) asbestos by weight, as defined by the State of California.

3.1.3 If the total amount of ACM or ACCM to be abated is equal to or greater than 100 s.f. the following regulations must be met.

3.1.3.1 South Coast Air Quality Management District (SCAQMD), Rule 1403, this rule requires District notification and removal of all ACM items (friable and non-friable) from a building prior to demolition. It requires the use of a state certified and a registered asbestos abatement contractor and a ten (10) day written notification. However, no notification is required if there is less than 100 square feet of ACM to be disturbed unless ACM is disturbed during renovation or demolition activities outside of a containment, then a Procedure 5 investigation and clean-up are required. SCAQMD does not regulate ACCM.

3.1.3.2 Labor Code 6501.5, requires the use of a state certified and registered asbestos abatement contractor for all asbestos removal projects that are equal to or more than 100 square feet of ACCM or ACM.

3.1.3.3 Federal Occupational Safety and Health Administration (OSHA) 29 CFR 1926.1101, California Code of Regulation (CCR) Title 8 § 1529 and § 5208 require employers to monitor the exposure of their employees who may be exposed to asbestos. If employees are exposed above certain criteria, the employer must take action to limit the employee's exposure to asbestos and to protect the employee's health. Per these regulations, the permissible exposure limit (PEL) for asbestos is 0.1 fibers per cubic centimeter of air (f/cc) expressed as an eight-hour time

Page 3 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com weighted average (TWA) and the Excursion Limit is 1.0 f/cc expressed over a 30 minute time period.

3.1.3.4 Environmental Protection Agency (EPA) National Emission Standards for Hazardous Air Pollutants (NESHAP) 40 CFR Part 61, Subpart M requires the inspection for ACMs prior to any planned renovation or demolition of a building. If ACM has been identified it specifies work practice standards designed to minimize the release of asbestos fibers, such as the use of wet methods during building demolition or renovation, sealing waste in leak tight containers, transportation and disposal of waste material as expediently as practicable. The regulation also requires the owner or the operator of the renovation or demolition operation to notify the appropriate delegated entity (often a state agency) before any demolition or before any renovations of buildings when the amount of Regulated Asbestos Containing Material (RACM) is greater than 260 linear feet, 160 square feet or 35 cubic feet.

3.1.3.5 Environmental Protection Agency (EPA), Asbestos Hazard Emergency Response Act (AHERA) 40 CFR Part 763, Subpart E, this rule requires all K-12, public and private non-profit elementary and secondary schools nationwide, to inspect their schools for asbestos-containing building materials (ACBM) and develop and maintain an up-to-date Asbestos Management Plan (AMP). The management of ACBM can be maintained on an “in-place” based principle and the removal of ACBM is not necessary unless it is severely damaged or may become disturbed during a planned demolition or renovation project. In the event ACBM is to be removed or the school building demolished, public and private school districts must comply with NESHAP. The AHERA rule also stipulates that any personnel working on asbestos activities in schools must be trained and accredited in accordance with the Asbestos Model Accreditation Plan.

3.2 Lead and Other Metal Waste

3.2.1 Lead and other metal wastes are regulated under California Title 22, §66261.24. The standard defines lead hazardous waste as greater than (>) 1,000 milligrams per kilogram (mg/kg) of lead and/or lead compounds

Page 4 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com determined as a Total Threshold Limit Concentration (TTLC) or 5.0 milligrams per liter (mg/l) determined as a Soluble Threshold Limit Concentration (STLC) or Waste Extraction Test (WET) method.

3.2.2 Under California Title 22, other metal wastes are also regulated.

3.2.3 Federal EPA under Resource Conservation and Recovery Act (RCRA) also mandates hazardous waste criteria for lead and other metals that is tested by the Toxicity Characteristic Leaching Procedure (TCLP). This method sets a limit for the quantity of lead that can be “soluble” or leach into the water. The EPA maximum toxicity characteristic for lead is equal to or greater than (>) 5.0 mg/l.

3.3 Other Regulations and Guidelines

California Title 8, CCR §5194, Hazard Communication Standard, requires employers to notify their employees of hazardous materials in their workplace.

4.0 RESULTS

4.1 The laboratory reports with chains-of-custody documentation are provided in Appendix A, the asbestos laboratory certification is provided in Appendix B, figures are provided in Appendix C, a photo exhibit is provided in Appendix D, and licenses provided are in Appendix E.

4.2 HSA collected 11 representative paint samples from the tank surfaces for laboratory analysis. The results, descriptions and analytical results are presented in Table IA through ID - Bulk Sampling Results for Metals. The sampling results are evaluated and compared with reference to levels regulated by California Title 22, §66261.24 hazardous waste standards for metals and Resource Conservation and Recovery Act (40 CFR Part 261).

4.3 Laboratory analysis determined that the following paint contained levels above the total threshold limit concentration (TTLC) criteria and is considered to be and must be disposed of as a hazardous waste in the State of California.

Additionally , the paint could also fail the Toxicity Characteristic Leaching Procedure (TCLP) test. Therefore the contractor should segregate all waste generated, such as but not limited to, paint chips, polyethylene sheeting, and personal protective equipment (PPE), from these tanks into separate waste streams and be submitted to the laboratory for TCLP analysis to determine proper disposal and to meet local, state and federal requirements.

Page 5 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com

4.3.1 Quail Valley 2 - Yellow paint on handrail - Barium

4.3.2 Quail Valley 1 - Beige paint on tank - Barium, Lead, and Zinc

4.3.3 Quail Valley 1 - Light beige paint on tank - Barium, Lead, and Zinc

4.3.4 Quail Valley 1 - Off-white paint on tank - Barium

4.3.5 Quail Valley 1 - Yellow paint on piping - Zinc

4.3.6 Benton Tank - Beige paint on tank - Zinc

4.3.7 Oliver Tank - Yellow paint on piping - Zinc

4.3.8 Oliver Tank - Paint used to cover graffiti - Zinc

4.4 Listed below are paint sample results that were below their respective TTLC levels, but could fail the Soluble Threshold Limit Concentration (STLC) and/or the TCLP tests. Follow-up sampling and analysis will need to be performed prior to disposal by the contractor or in-house personnel as part of the required waste characterization process.

4.4.1 Quail Valley 2 - Beige paint on tank - Barium, Chromium, Copper, and Nickel

4.4.2 Oliver Tank - Beige paint on tank - Barium, Cadmium, and Zinc

4.4.3 Oliver Tank - Dark beige paint on hatch - Zinc

4.5 The results, descriptions, estimated quantities, and analytical results for asbestos bulk samples are presented in Table II. HSA collected 12 suspect bulk asbestos resulting in 14 analyses by layer. Laboratory analysis determined that none of the materials sampled were ACM/ACCM per PLM method. No further action is required for the materials sampled unless other, previously hidden suspect ACMs are determined to be present during any future renovation /maintenance or demolition activities.

4.6 *Note: all suspect bulk asbestos samples collected are representative of the materials found in each location. Therefore, materials similar in color, texture and appearance as those identified as ACM located within the sampled areas are to be considered asbestos until tested.

5.0 RECOMMENDATIONS

5.1 The lab results form this survey determined that ACM/ACCM were not identified in the materials sampled at the subject locations.

5.2 During the impact of paint, generated waste should be segregated into different waste streams (i.e. paint chips, cleaning items, poly sheeting, PPE, etc.) and a waste profile should be conducted on separately on each waste stream to comply with all local, State, and Federal laws. Once the removal has begun, a

Page 6 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com bulk sample can be collected by the contractor and/or in-house personnel and submitted to the lab by the contractor for analysis to determine disposal costs.

5.3 As stated in 4.3 and 4.4, follow-up sampling and analysis will need to be performed prior to disposal by the contractor or in-house personnel as part of the required waste characterization process.

5.4 Care should be taken when performing any activities (e.g. manually dry sanding or scraping surfaces) to prepare any of the component(s) either determined to be coated with or which are suspected of containing lead for repainting.

5.5 It is HSA’s understanding that the tanks are scheduled for maintenance/renovation at some future date. Therefore, due to the nature, age, hidden, or unknown suspect ACM/ACCM, lead, or other hazardous materials may be uncovered during any future renovation/maintenance activities.

Therefore, all contractors working on the project should be informed of policies with regard to notifying management/owner if previously unidentified suspect hazardous materials are discovered during the project.

5.6 This report was prepared for use by Eastern Municipal Water District in evaluating the subject site. The information contained within this report is as factual as possible and the opinions related herein are based on HSA’s experience in similar investigations. Therefore, no warranty is made to any persons other than Eastern Municipal Water District regarding the conclusions or recommendations included within this report. HSA will not release copies to a third party without prior written consent of Eastern Municipal Water District.

For questions regarding this report, please contact us at HSA@healthscience.com.

Page 7 - Project Number 250190LA

HSA | 10771 Noel Street | Los Alamitos | California | 90720 | Phone: 714-220-3922 | www.healthscience.com

TABLE IA - CAM 17 Sampling Results for Metals - Oliver Tank

HSA Project Number: 250190LA

Project: Eastern Municipal Water District, S4144 Oliver Tank, Moreno Valley, CA

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357)

Sample Number

Location /Description Ag

(silver) As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

Parameter mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

250190-Oliver-

CAM-01

Composite - Beige paint on tank <5.2 <5.2 3300 D <5.2 38 <5.2 <5.2 12 -- <5.2 66 5.6 <5.2 <5.2 <5.2 8.2 4700 D

250190-Oliver-

CAM-02

Composite - Yellow paint on piping

<5.0 <5.0 32 <5.0 <5.0 7.0 33 5.1 <0.020 7.8 430 <5.0 <5.0 <5.0 <5.0 9.8 13000

D

250190-Oliver-

CAM-03

Composite - Dark beige paint on

Hatch 1

<14 <14 36 <14 <14 <14 <14 <14 -- <14 <14 <14 <14 <14 <14 <14 680

250190-Oliver-

CAM-04

Composite - Graffiti covering tank

<17 <17 530 <17 <17 <17 <17 <17 -- <17 95 <17 <17 <17 <17 <17 6800

Standards/Guidelines

California Title 22, §66261.24 regulatory levels - Total

Threshold Limit Conc. (TTLC) mg/kg mg/kg

10,000 mg/kg

*[FNc] mg/kg mg/kg mg/kg

8,000 mg/kg

2,500 mg/kg

20 1,000 mg/kg

3,500 mg/kg

2,000 mg/kg mg/kg mg/kg mg/kg

2,400 mg/kg

5,000 mg/kg

TTLC result at which could fail the STLC test in ppm based on a 20:1 dilution

25 25 500 20 5 25 400 125 1 50 175 100 25 5 35 120 250

California Title 22, §66261.24 regulatory levels - Soluble

Threshold Limit Conc. (STLC) mg/l

5.0 mg/l mg/l

0.75 mg/l

1.0 mg/l mg/l mg/l mg/l

0.2 mg/L

5.0 mg/l mg/l mg/l mg/l

1.0 mg/l

7.0 mg/l mg/l mg/l

EPA 40 CFR § 261.24 TCLP levels 5 mg/l

5.0 mg/l mg/l

-- 1.0 mg/l mg/l

-- -- 0.2 mg/L

5.0 mg/l

-- -- -- 1.0 mg/l

TTLC result that could fail the TCLP in ppm based on a 10:1 dilution

50 50 1000 -- 10 50 -- -- 2 100 -- -- -- 10 -- -- --

Abbreviations: mg=milligrams; kg = kilograms; l = liter; Ag=silver; As = Arsenic; Ba = Barium; Be = Beryllium; Cd = Cadmium; Cr = Chromium; Co = Cobalt; Cu = Copper; Hg = Mercury; Pb = Lead; Mo =

Molybdenum; Ni = Nickel; Sb = Antimony; Se = Selenium; Tl = Thallium; Va = Vanadium; Zn = Zinc

TABLE IA - CAM 17 Sampling Results for Metals - Oliver Tank Continued

Project: Eastern Municipal Water District, S4144 Oliver Tank, Moreno Valley, CA

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357

Sample Number

Location /Description Ag

(silver) As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

STLC and TTLC values are calculated on the concentrations of the elements, not the compounds; * = [FNc]c excluding barium sulfate https://govt.westlaw.com/calregs/Document/I07DBE58C0F8C446C9715168D2C88CC9E?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)

TABLE IB - CAM 17 Sampling Results for Metals - Quail Valley 1

Project: Eastern Municipal Water District, S4114 Quail Valley 1 Tank, Menifee, CA, and

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357)

Sample Number

Location /Description Ag

(silver)

As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

Parameter mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

250190-QV1-

CAM-01

Composite - Beige paint on tank <18 <18 33000D <18 <18 180 <18 18 -- 1500 43 <18 <18 <18 <18 <18 6700

250190-QV1-C

AM-02

Composite - Light beige paint on tank

<17 <17 41000D <17 <17 150 <17 <17 -- 1200 36 <17 <17 <17 <17 <17 5100

250190-QV1-C

AM-03

Composite - Off white paint on tank

<59 <59 89000D <59 <59 <59 <59 <59 -- <59 <59 <59 <59 <59 <59 <59 2200

250190-QV1-C

AM-04

Composite - Yellow paint on piping

<5.0 <5.0 9200D <5.0 11 10 130 75 -- 210 <5.0 8.8 <5.0 <5.0 <5.0 <5.0 8500D

Standards/Guidelines

California Title 22, §66261.24 regulatory levels - Total

Threshold Limit Conc. (TTLC) mg/kg mg/kg

10,000 mg/kg

*[FNc] mg/kg mg/kg mg/kg

8,000 mg/kg

2,500 mg/kg

20 1,000 mg/kg

3,500 mg/kg

2,000 mg/kg mg/kg mg/kg mg/kg

2,400 mg/kg

5,000 mg/kg

TTLC result at which could fail the STLC test in ppm based on a 20:1 dilution

25 25 500 20 5 25 400 125 1 50 175 100 25 5 35 120 250

California Title 22, §66261.24 regulatory levels - Soluble

Threshold Limit Conc. (STLC) mg/l

5.0 mg/l mg/l

0.75 mg/l

1.0 mg/l mg/l mg/l mg/l

0.2 mg/L

5.0 mg/l mg/l mg/l mg/l

1.0 mg/l

7.0 mg/l mg/l mg/l

EPA 40 CFR § 261.24 TCLP levels 5 mg/l

5.0 mg/l mg/l

-- 1.0 mg/l mg/l

-- -- 0.2 mg/L

5.0 mg/l

-- -- -- 1.0 mg/l

TTLC result that could fail the TCLP in ppm based on a 10:1 dilution

50 50 1000 -- 10 50 -- -- 2 100 -- -- -- 10 -- -- --

Abbreviations: mg=milligrams; kg = kilograms; l = liter; Ag=silver; As = Arsenic; Ba = Barium; Be = Beryllium; Cd = Cadmium; Cr = Chromium; Co = Cobalt; Cu = Copper; Hg = Mercury; Pb = Lead; Mo =

Molybdenum; Ni = Nickel; Sb = Antimony; Se = Selenium; Tl = Thallium; Va = Vanadium; Zn = Zinc

TABLE IB - CAM 17 Sampling Results for Metals - Quail Valley 1 Continued

Project: Eastern Municipal Water District, S4114 Quail Valley 1 Tank, Menifee, CA, and

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357)

Sample Number

Location /Description Ag

(silver)

As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

STLC and TTLC values are calculated on the concentrations of the elements, not the compounds; * = [FNc]c excluding barium sulfate https://govt.westlaw.com/calregs/Document/I07DBE58C0F8C446C9715168D2C88CC9E?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)

TABLE IC - CAM 17 Sampling Results for Metals - Quail Valley 2

Project: Eastern Municipal Water District, S4160 Quail Valley 2 Tank, Menifee, CA

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357)

Sample Number

Location /Description Ag

(silver)

As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

Parameter mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

250190-QV2-

CAM-01

Composite - Beige paint on tank <4.9 <4.9 5900 D <4.9 <4.9 110 <4.9 350 -- <4.9 46 170 <4.9 <4.9 <4.9 <4.9 86

250190-QV2-C

AM-02

Yellow paint off handrail <66 <66 31000 <66 <66 <66 120 <66 -- <66 <66 <66 <66 <66 <66 <66 190

Standards/Guidelines

California Title 22, §66261.24 regulatory levels - Total

Threshold Limit Conc. (TTLC) mg/kg mg/kg

10,000 mg/kg

*[FNc] mg/kg mg/kg mg/kg

8,000 mg/kg

2,500 mg/kg

20 1,000 mg/kg

3,500 mg/kg

2,000 mg/kg mg/kg mg/kg mg/kg

2,400 mg/kg

5,000 mg/kg

TTLC result at which could fail the STLC test in ppm based on a 20:1 dilution

25 25 500 20 5 25 400 125 1 50 175 100 25 5 35 120 250

California Title 22, §66261.24 regulatory levels - Soluble

Threshold Limit Conc. (STLC) mg/l

5.0 mg/l mg/l

0.75 mg/l

1.0 mg/l mg/l mg/l mg/l

0.2 mg/L

5.0 mg/l mg/l mg/l mg/l

1.0 mg/l

7.0 mg/l mg/l mg/l

EPA 40 CFR § 261.24 TCLP levels 5 mg/l

5.0 mg/l mg/l

-- 1.0 mg/l mg/l

-- -- 0.2 mg/L

5.0 mg/l

-- -- -- 1.0 mg/l

TTLC result that could fail the TCLP in ppm based on a 10:1 dilution

50 50 1000 -- 10 50 -- -- 2 100 -- -- -- 10 -- -- --

Abbreviations: mg=milligrams; kg = kilograms; l = liter; Ag=silver; As = Arsenic; Ba = Barium; Be = Beryllium; Cd = Cadmium; Cr = Chromium; Co = Cobalt; Cu = Copper; Hg = Mercury; Pb = Lead; Mo =

Molybdenum; Ni = Nickel; Sb = Antimony; Se = Selenium; Tl = Thallium; Va = Vanadium; Zn = Zinc

STLC and TTLC values are calculated on the concentrations of the elements, not the compounds; * = [FNc]c excluding barium sulfate https://govt.westlaw.com/calregs/Document/I07DBE58C0F8C446C9715168D2C88CC9E?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default

TABLE ID - CAM 17 Sampling Results for Metals - Benton Road Recycle Tank

Project: Eastern Municipal Water District, S9822 Benton Road Recycle Tank, Winchester, CA

Date: August 5, 2025 Ind. Hyg: D. Berman, IH, CDPH I/A, (LRC 00002357)

Sample Number

Location /Description Ag

(silver)

As Ba Be Cd Cr Co Cu Hg Pb Mo Ni Sb Se Tl Va Zn

Parameter mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

250190-Benton-

CAM-01

Composite - Beige paint on tank

<5.0 <5.0 310 <5.0 <5.0 <5.0 <5.0 8.1 <0.020 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 5500D

Standards/Guidelines

California Title 22, §66261.24 regulatory levels - Total

Threshold Limit Conc. (TTLC) mg/kg mg/kg

10,000 mg/kg

*[FNc] mg/kg mg/kg mg/kg

8,000 mg/kg

2,500 mg/kg

20 1,000 mg/kg

3,500 mg/kg

2,000 mg/kg mg/kg mg/kg mg/kg

2,400 mg/kg

5,000 mg/kg

TTLC result at which could fail the STLC test in ppm based on a 20:1 dilution

25 25 500 20 5 25 400 125 1 50 175 100 25 5 35 120 250

California Title 22, §66261.24 regulatory levels - Soluble

Threshold Limit Conc. (STLC) mg/l

5.0 mg/l mg/l

0.75 mg/l

1.0 mg/l mg/l mg/l mg/l

0.2 mg/L

5.0 mg/l mg/l mg/l mg/l

1.0 mg/l

7.0 mg/l mg/l mg/l

EPA 40 CFR § 261.24 TCLP levels 5 mg/l

5.0 mg/l mg/l

-- 1.0 mg/l mg/l

-- -- 0.2 mg/L

5.0 mg/l

-- -- -- 1.0 mg/l

TTLC result that could fail the TCLP in ppm based on a 10:1 dilution

50 50 1000 -- 10 50 -- -- 2 100 -- -- -- 10 -- -- --

Abbreviations: mg=milligrams; kg = kilograms; l = liter; Ag=silver; As = Arsenic; Ba = Barium; Be = Beryllium; Cd = Cadmium; Cr = Chromium; Co = Cobalt; Cu = Copper; Hg = Mercury; Pb = Lead; Mo =

Molybdenum; Ni = Nickel; Sb = Antimony; Se = Selenium; Tl = Thallium; Va = Vanadium; Zn = Zinc

STLC and TTLC values are calculated on the concentrations of the elements, not the compounds; * = [FNc]c excluding barium sulfate https://govt.westlaw.com/calregs/Document/I07DBE58C0F8C446C9715168D2C88CC9E?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)

Table IIA - Bulk Asbestos Sampling Results - Oliver Tank

Project: Eastern Municipal Water District, S4144 Oliver Tank, Moreno Valley, CA

Date: August 5, 2025 Ind. Hyg.: D. Berman, IH, CAC (15-5418)

Sample No.

Material Location Description

Asbestos Results

Type and Percent (%) Condition

Approximate

Square/Linear footage

250190-Oliver-01A

Paint Oliver Tank

North side of tank None Detected

Good 5000 sq. ft.

250190-Oliver-01B South side of tank None Detected

250190-Oliver-01C West side of tank None Detected

Standards/Guidelines:

EPA - ACM >1.0

State of California - ACCM >0.1

Analytical Method: EPA 600/R-93/116 - Polarized Light Microscopy (PLM)

Abbreviations: ND = none detected; < = less than; % - percent; EPA = Environmental Protection Agency; ACM = Asbestos Containing Material; ACCM = Asbestos Containing

Construction Material; LF = linear feet; ft2 = square feet; bold/shade = ACM; bold print only = ACCM

Disclaimer: HSA’s measurements and component identifications are approximations and must be confirmed by contractors bidding the project. In addition, hidden or unknown suspect asbestos containing materials (ACM)/asbestos containing construction materials (ACCM) or lead containing/coated materials may be uncovered during the project. Multiple layers of building materials exist, abatement includes all layers of both ACMs and non-ACMs including all residue. Similar materials in color, texture and appearance as those identified in HSA’s report should be considered asbestos until sampled. All contractors working on the project should notify the Owner regarding the discovery of unidentified hazardous materials. All work to be performed in accordance with all state, local and federal regulations.

Table IIB - Bulk Asbestos Sampling Results - Quail Valley 1

Project: Eastern Municipal Water District, S4114 Quail Valley 1 Tank, Menifee, CA

Date: August 5, 2025 Ind. Hyg.: D. Berman, IH, CAC (15-5418)

Sample No.

Material Location Description

Asbestos Results

Type and Percent (%) Condition

Approximate

Square/Linear footage

250190-QV1-01A

Paint Quail Valley 1

North side of tank None Detected

Good 3000 sq. ft.

250190-QV1-01B West side on pipe None Detected

250190-QV1-01C South side of tank None Detected

Standards/Guidelines:

EPA - ACM >1.0

State of California - ACCM >0.1

Analytical Method: EPA 600/R-93/116 - Polarized Light Microscopy (PLM)

Abbreviations: ND = none detected; < = less than; % - percent; EPA = Environmental Protection Agency; ACM = Asbestos Containing Material; ACCM = Asbestos Containing

Construction Material; LF = linear feet; ft2 = square feet; bold/shade = ACM; bold print only = ACCM

Disclaimer: HSA’s measurements and component identifications are approximations and must be confirmed by contractors bidding the project. In addition, hidden or unknown suspect asbestos containing materials (ACM)/asbestos containing construction materials (ACCM) or lead containing/coated materials may be uncovered during the project. Multiple layers of building materials exist, abatement includes all layers of both ACMs and non-ACMs including all residue. Similar materials in color, texture and appearance as those identified in HSA’s report should be considered asbestos until sampled. All contractors working on the project should notify the Owner regarding the discovery of unidentified hazardous materials. All work to be performed in accordance with all state, local and federal regulations.

Table IIC - Bulk Asbestos Sampling Results - Quail Valley 2

Project: Eastern Municipal Water District, S4160 Quail Valley 2 Tank, Menifee, CA

Date: August 5, 2025 Ind. Hyg.: D. Berman, IH, CAC (15-5418)

Sample No.

Material Location Description

Asbestos Results

Type and Percent (%) Condition

Approximate

Square/Linear footage

250190-QV2-01A

Paint Quail Valley 2

North side on pipe Paint - None Detected

Coating - None Detected

Good 3000 sq. ft.

250190-QV2-01B South side None Detected

250190-QV2-01C North side off handrail 1 None Detected

Standards/Guidelines:

EPA - ACM >1.0

State of California - ACCM >0.1

Analytical Method: EPA 600/R-93/116 - Polarized Light Microscopy (PLM)

Abbreviations: ND = none detected; < = less than; % - percent; EPA = Environmental Protection Agency; ACM = Asbestos Containing Material; ACCM = Asbestos Containing

Construction Material; LF = linear feet; ft2 = square feet; bold/shade = ACM; bold print only = ACCM

Disclaimer: HSA’s measurements and component identifications are approximations and must be confirmed by contractors bidding the project. In addition, hidden or unknown suspect asbestos containing materials (ACM)/asbestos containing construction materials (ACCM) or lead containing/coated materials may be uncovered during the project. Multiple layers of building materials exist, abatement includes all layers of both ACMs and non-ACMs including all residue. Similar materials in color, texture and appearance as those identified in HSA’s report should be considered asbestos until sampled. All contractors working on the project should notify the Owner regarding the discovery of unidentified hazardous materials. All work to be performed in accordance with all state, local and federal regulations.

Table IID - Bulk Asbestos Sampling Results - Benton Road Recycle Tank

Project: Eastern Municipal Water District, S9822 Benton Road Recycle Tank, Winchester, CA

Date: August 5, 2025 Ind. Hyg.: D. Berman, IH, CAC (15-5418)

Sample No.

Material Location Description

Asbestos Results

Type and Percent (%) Condition

Approximate

Square/Linear footage

250190-Benton-01A

Paint Benton Road Recycle Tank

West side of tank None Detected

Good 3000 sq. ft.

250190-Benton-01B Pipe on north side of tank Paint - None Detected

Coating - None Detected

250190-Benton-01C East side of tank None Detected

Standards/Guidelines:

EPA - ACM >1.0

State of California - ACCM >0.1

Analytical Method: EPA 600/R-93/116 - Polarized Light Microscopy (PLM)

Abbreviations: ND = none detected; < = less than; % - percent; EPA = Environmental Protection Agency; ACM = Asbestos Containing Material; ACCM = Asbestos Containing

Construction Material; LF = linear feet; ft2 = square feet; bold/shade = ACM; bold print only = ACCM

Disclaimer: HSA’s measurements and component identifications are approximations and must be confirmed by contractors bidding the project. In addition, hidden or unknown suspect asbestos containing materials (ACM)/asbestos containing construction materials (ACCM) or lead containing/coated materials may be uncovered during the project. Multiple layers of building materials exist, abatement includes all layers of both ACMs and non-ACMs including all residue. Similar materials in color, texture and appearance as those identified in HSA’s report should be considered asbestos until sampled. All contractors working on the project should notify the Owner regarding the discovery of unidentified hazardous materials. All work to be performed in accordance with all state, local and federal regulations.

Appendix A - Laboratory Reports

LA Testing 5431 Industrial Drive Huntington Beach, CA 92649

Tel/Fax: (714) 828-4999 / (714) 828-4944 http://www.LATesting.com / hblab@latesting.com

332521019LA Testing Order:

Customer ID: 32HEAL56

Customer PO:

Project ID:

Attention: Phone:Devin Berman (714) 220-3922

Fax:Health Science Associates

Received Date:10771 Noel Street 08/05/2025 12:10 PM

Analysis Date:Los Alamitos, CA 90720 08/06/2025

Collected Date: 08/05/2025

Project: 250190LA / S4160 QUAIL VALLEY 2 MENIFEE, CA

Test Report: Asbestos Analysis of Bulk Materials via AHERA Method 40CFR 763 Subpart E

Appendix E supplemented with EPA 600/R-93/116 using Polarized Light Microscopy

Sample Description Appearance % Fibrous % Non-Fibrous

Non-Asbestos Asbestos

% Type

250190-QV2-01A-Paint

332521019-0001

None DetectedNon-fibrous (Other)100%Brown/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 2

TANK - N SIDE OF

PIPE - PAINT

250190-QV2-01A-Coati ng

332521019-0001A

None DetectedNon-fibrous (Other)97%Synthetic3%Red

Non-Fibrous

Homogeneous

QUAIL VALLEY 2

TANK - N SIDE OF

PIPE - PAINT

250190-QV2-01B

332521019-0002

None DetectedNon-fibrous (Other)100%Brown/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 2

TANK - S SIDE -

PAINT

250190-QV2-01C

332521019-0003

None DetectedNon-fibrous (Other)100%Brown/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 2

TANK - N SIDE OFF

HANDRAIL - PAINT

250190-QV1-01A

332521019-0004

None DetectedNon-fibrous (Other)100%Red/Silver/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 1

TANK - N SIDE OF

TANK - PAINT

250190-QV1-01B

332521019-0005

None DetectedNon-fibrous (Other)100%Red/Silver/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 1

TANK - W SIDE OF

TANK OFF PIPE -

PAINT

250190-QV1-01C

332521019-0006

None DetectedNon-fibrous (Other)100%Brown/White/Beige

Non-Fibrous

Heterogeneous

QUAIL VALLEY 1

TANK - S AREA -

PAINT

250190-BENTON-01A

332521019-0007

None DetectedNon-fibrous (Other)100%Brown/White/Rust

Non-Fibrous

Heterogeneous

BENTON TANK - W

SIDE OF TANK -

PAINT

250190-BENTON-01B-

Paint

332521019-0008

None DetectedNon-fibrous (Other)100%Brown/White

Non-Fibrous

Heterogeneous

BENTON TANK -

OFF PIPING ON N

SIDE OF TANK -

PAINT

250190-BENTON-01B-

Coating

332521019-0008A

None DetectedNon-fibrous (Other)100%Gray

Non-Fibrous

Homogeneous

BENTON TANK -

OFF PIPING ON N

SIDE OF TANK -

PAINT

250190-BENTON-01C

332521019-0009

None DetectedNon-fibrous (Other)100%Gray/Rust

Non-Fibrous

Heterogeneous

BENTON TANK - E

SIDE OF TANK -

PAINT

250190-OLIVER-01A

332521019-0010

None DetectedNon-fibrous (Other)100%Gray/Beige/Rust

Non-Fibrous

Heterogeneous

OLIVER TANK - N

SIDE OF TANK -

PAINT

250190-OLIVER-01B

332521019-0011

None DetectedNon-fibrous (Other)100%Brown/White/Beige

Non-Fibrous

Heterogeneous

OLIVER TANK - S

SIDE OF TANK -

PAINT

250190-OLIVER-01C

332521019-0012

None DetectedNon-fibrous (Other)100%Brown/Gray/Beige

Non-Fibrous

Heterogeneous

OLIVER TANK - W

SIDE OF TANK -

PAINT

Initial report from: 08/06/2025 14:33:31

Page 1 of 2ASB_PLM_0008_0002 - 2.31 Printed: 8/6/2025 11:33 AM

5431 Industrial Drive Huntington Beach, CA 92649

Tel/Fax: (714) 828-4999 / (714) 828-4944 http://www.LATesting.com / hblab@latesting.com

332521019LA Testing Order:

Customer ID: 32HEAL56

Customer PO:

Project ID:

Analyst(s)

Kaylin Luciani (10)

Thanh Nguyen (4)

Michael Chapman, Laboratory Manager or Other Approved Signatory

LA Testing maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by LA Testing. LA Testing bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received. Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted. The above analyses were performed in general compliance with Appendix E to Subpart E of 40 CFR (previously EPA 600/M4-82-020 “Interim

Method”) but augmented with procedures outlined in the 1993 (”final”) version of the method. This report must not be used by the client to claim product certification, approval, or endorsement by

NVLAP, NIST or any agency of the federal government. Non-friable organically bound materials present a problem matrix and therefore LA Testing recommends gravimetric reduction prior to analysis.

Unless requested by the client, building materials manufactured with multiple layers (i.e. linoleum, wallboard, etc.) are reported as a single sample. Estimation of uncertainty is available on request.

Samples analyzed by LA Testing Huntington Beach, CA NVLAP Lab Code 101384-0, CA ELAP 1406

Initial report from: 08/06/2025 14:33:31

Page 2 of 2ASB_PLM_0008_0002 - 2.31 Printed: 8/6/2025 11:33 AM

O r d e r I D

P a g e f d e r I D

P a g e d e r I D

P a g e d e r I D

P a g e

Michael Chapman, Laboratory Manager

Approved By:

Fax:

Phone: (714) 220-3922

The following analytical report covers the analysis performed on samples submitted to LA Testing on 8/5/2025. The results are tabulated on the attached data pages for the following client designated project:

250190LA - EASTERN MUNICIPAL WATER DISTRICT - S4144

OLIVER TANK MORENO VALLEY

The reference number for these samples is EMSL Order #332521024. Please use this reference when calling about these samples. If you have any questions, please do not hesitate to contact me at (714) 828-4999.

8/6/2025Attn: Lab results Health Science Associates 10771 Noel Street Los Alamitos, CA 90720

The samples associated with this report were received in good condition unless otherwise noted. This report relates only to those items tested as received by the laboratory. The QC data associated with the sample results meet the recovery and precision requirements established by the NELAP, unless specifically indicated. All results for soil samples are reported on a dry weight basis, unless otherwise noted. This report may not be reproduced except in full and without written approval by EMSL Analytical, Inc.

Text43:

Text45:

LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone: (714) 828-4999 Fax: (714) 828-4944 Email: hblab@latesting.com mailto:hblab@latesting.com

5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax: (714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com

332521024 CustomerID: 32HEAL56 CustomerPO: 250190LA ProjectID:

LA Testing Order:

Analytical Results

Attn: Lab results Health Science Associates 10771 Noel Street Los Alamitos, CA 90720

Received: 8/5/2025 12:10 PM

250190LA - EASTERN MUNICIPAL WATER DISTRICT - S4144 OLIVER TANK MORENO VALLEY

Fax:

Phone: (714) 220-3922

Project:

8/5/2025Collected:

Client Sample Description Lab ID:250190-OLIVER-CAM 01 332521024-0001

- BEIGE PAINT ON TANK COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

METALS

3050B/6010D Antimony TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Arsenic TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Barium TH3300 mg/Kg 8/6/2025 14:2152 8/6/2025 THD

3050B/6010D Beryllium TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Cadmium TH38 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Chromium TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Cobalt TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Copper TH12 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Lead TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Molybdenum TH66 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Nickel TH5.6 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Selenium TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Silver TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Thallium TH<5.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Vanadium TH8.2 mg/Kg 8/6/2025 13:365.2 8/6/2025 TH

3050B/6010D Zinc TH4700 mg/Kg 8/6/2025 14:2152 8/6/2025 THD

Client Sample Description Lab ID:250190-OLIVER-CAM 02 332521024-0002

- YELLOW PAINT OFF PIPING COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

METALS

Mercury by CVAA, SW- 846-7471B

Mercury XL<0.020 mg/Kg 8/6/2025 00:000.020 8/6/2025 XL

3050B/6010D Antimony TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Arsenic TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Barium TH32 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Beryllium TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Cadmium TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Chromium TH7.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Cobalt TH33 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Copper TH5.1 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Lead TH7.8 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Molybdenum TH430 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Nickel TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

Page 2 of 8ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 8/6/2025 3:22:14 PM http://www.LATesting.com

Phone/Fax: (714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com

332521024 CustomerID: 32HEAL56 CustomerPO: 250190LA ProjectID:

LA Testing Order:

Analytical Results

Attn: Lab results Health Science Associates 10771 Noel Street Los Alamitos, CA 90720

Received: 8/5/2025 12:10 PM

250190LA - EASTERN MUNICIPAL WATER DISTRICT - S4144 OLIVER TANK MORENO VALLEY

Fax:

Phone: (714) 220-3922

Project:

8/5/2025Collected:

Client Sample Description Lab ID:250190-OLIVER-CAM 02 332521024-0002

- YELLOW PAINT OFF PIPING COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

METALS

3050B/6010D Selenium TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Silver TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Thallium TH<5.0 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Vanadium TH9.8 mg/Kg 8/6/2025 13:385.0 8/6/2025 TH

3050B/6010D Zinc TH13000 mg/Kg 8/6/2025 14:2350 8/6/2025 THD

Client Sample Description Lab ID:250190-OLIVER-CAM 03 332521024-0003

- DARK BEIGE PAINT ON HATCH | COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

METALS

3050B/6010D Antimony TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Arsenic TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Barium TH36 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Beryllium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Cadmium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Chromium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Cobalt TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Copper TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Lead TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Molybdenum TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Nickel TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Selenium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Silver TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Thallium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Vanadium TH<14 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

3050B/6010D Zinc TH680 mg/Kg 8/6/2025 13:4014 8/6/2025 TH

Client Sample Description Lab ID:250190-OLIVER-CAM 04 332521024-0004

- GRAFFITI COVERING PAINT COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

METALS

3050B/6010D Antimony TH<17 mg/Kg 8/6/2025 13:4217 8/6/2025 TH

3050B/6010D Arsenic TH<17 mg/Kg 8/6/2025 13:4217 8/6/2025 TH

Page 3 of 8ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 8/6/2025 3:22:14 PM

Phone/Fax: (714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com

332521024 CustomerID: 32HEAL56 CustomerPO: 250190LA ProjectID:

LA Testing Order:

Analytical Results

Attn: Lab results Health Science Associates 10771 Noel Street Los Alamitos, CA 90720

Received: 8/5/2025 12:10 PM

250190LA - EASTERN MUNICIPAL WATER DISTRICT - S4144 OLIVER TANK MORENO VALLEY

Fax:

Phone: (714) 220-3922

Project:

8/5/2025Collected:

Client Sample Description Lab ID:250190-OLIVER-CAM 04 332521024-0004

- GRAFFITI COVERING PAINT COMPOSITE

Collected: 8/5/2025

Method Parameter Result UnitsRL Analysis

Date & Time Prep

Date & Time

M…