CSA 70J Exterior Tanks and Booster Buildings - Asbestos and Lead Report.pdf

SUSPECT ASBESTOS-CONTAINING MATERIALS

INSPECTION, ASSESSMENT, SAMPLING

and

LIMITED LEAD PAINT TESTING

Surveyed Locations Site 2A – 11505 El Centro Rd. Hesperia CA

Site 2B – West of Adkins Rd. on Whitehaven St., Oak Hills CA Site 3A – Near 6535 Oak Hill Rd., Oak Hills CA

Site 3B – 5528 Coriander Drive, Oak Hills CA Site 4A – 5563 Forestry Road, Hesperia CA

Site 4B – On Whitehaven Rd., West of Landover Rd., Oak Hills CA Site W1 – 14418 Ranchero Road, Hesperia CA

RBS Tank – 14418 Ranchero Road, Hesperia CA Site W3 – 7939 Opal Ave., Oak Hills CA

Report Date: February 9, 2026 Altec Project No. 910-2026142

Performed For:

San Bernardino County

Department of Public Works, Special Districts 222 Hospitality Lane, 2nd Floor

San Bernardino, CA 92415

Contact Enrique Carrillo Jr

(909) 386-8825 Enrique.carrillo@dpw.SBCounty.gov mailto:Enrique.carrillo@dpw.SBCounty.gov

Survey Report

TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 ASBESTOS RESULTS

3.0 LEAD PAINT RESULTS

4.0 SPECIAL NOTATIONS

Appendices

Appendix A - Analytical Results and Chain of Custody Forms

Appendix B - Sample Location Maps

Appendix C - Inspector Certificates

Appendix D - Laboratory Certifications

Appendix E - Supplemental Information

1.0 INTRODUCTION

On January 27, 2026, Certified Asbestos Consultant (#97-2295 Exp. 12/08/26) and Lead Sampling

Technician (#LRC-0139) Jay A. Yowell, with Altec Testing & Engineering, Inc. (Altec), personally collected bulk samples of suspect asbestos containing materials, and / or collected bulk lead paint samples from the areas identified by the client as Site 2A, Site 2B, 3A, 3B, 4A, 4B, W1, W3 and

RBS Tank located at various locations throughout Hesperia & Oak Hills California where no obvious fire or other structural damage was observed to the structures. The planned work is a renovation project as no structural building components will be removed. Jay A. Yowell personally collected one hundred thirty-five (135) suspect asbestos samples (including layers) and twenty-seven (27) bulk paint chip samples. The samples were securely maintained in possession of CAC

Jay A. Yowell until they could be transported and personally delivered to the laboratory for analysis on January 29, 2026.

Asbestos

The project task was to inspect, assess and sample the scope of work areas (as determined by the client) for asbestos per Mojave Desert Air Quality Management District (MDAQMD) Rule 1000 /

National Emission Standards for Hazardous Air Pollutants (NESHAPS – 40 CFR 61 Subpart M) in accordance with AHERA Part 763-Asbestos (763.86) sampling protocol with delivery of a final report in electronic pdf format following completion of the site survey and laboratory analysis. This report includes a summary of the assessment/inspection, a table of positive asbestos-containing materials (ACM) samples by standard polarized light microscopy-polarized light microscopy (PLM) analysis, a table of positive samples by 1000-point count analysis (if performed), a table of non-

ACM samples, chain of custody form, laboratory reports and inspector’s certifications.

Asbestos sample analysis was performed by the following laboratory:

Eurofins EPK Built Environment Testing West, LLC, 2841 Dow Avenue, Suite 300, Tustin, CA

92780, (866) 888-6653, NVLAP Lab Code: 200757-0.

Laboratory analysis was performed in accordance with AHERA Part 763-Asbestos (763.87) using standard polarized light microscopy (PLM) utilizing EAP/600/M4-82-020 and/or EPA/600/R-93/116 methods for analysis. Samples, if any, that were found to contain trace to ten percent (<1.0-10%) asbestos were recommended for re-analysis by PLM 1000-point counting when deemed necessary by Altec and when approved by the client.

Lead Paint Testing and Sampling

Mr. Yowell is also a CDPH Lead Sampling Technician (LRC-0139). He personally collected bulk paint chip samples from coated/painted buildings components in the scope of work areas that would be impacted by the planned renovation project to identify those that contain lead concentrations above the established action level.

Lead sample analysis was performed by the following laboratory:

Eurofins EPK Built Environment Testing West, LLC, 2841 Dow Avenue, Suite 300, Tustin, CA

92780, (866) 888-6653, NVLAP Lab Code: 200757-0. Laboratory analysis was performed by

NIOSH 7082 & EPA 7000B modified for lead (Flame Atomic Absorption/AA (EM-BC-S-8443).

This report includes a table of the bulk sample results, chain of custody forms, laboratory reports and inspector’s certifications.

Certification This asbestos inspection/sample collection/assessment and lead paint sampling was performed by Jay A. Yowell. The lead sampling was performed under the direction of Lynn A. Laborde.

Jay A. Yowell Lynn A. Laborde

Certified Asbestos Consultant #97-2295 Certified Lead Sampling Technician #LRC-

Certified Asbestos Consultant #92-495 Certified Lead Inspector/Risk Assessor #LRC- Certified Lead Project Monitor #LRC-7917

Altec Testing & Engineering, Inc.

6035 Fremont Street, Riverside, CA 92504 Mobile (951) 377-7825 Email: jyowell@altectesting.com

Altec Testing & Engineering, Inc.

6035 Fremont Street, Riverside, CA 92504 Mobile (909) 645-3826 Email: llaborde@altectesting.com

Professional certifications are provided in Appendix C of this report.

mailto:jyowell@altectesting.com mailto:llaborde@altectesting.com

2.0 ASBESTOS RESULTS

All observed suspect ACMs within the building and building exterior including the roof were identified, the material locations were documented, the friability and condition were assessed and if damaged materials were observed, an estimate of the percentage damaged was recorded. The total quantity of the material was recorded on Altec’s sample chain of custody forms provided after the laboratory report in Appendix A (quantities are approximate). Samples of the suspect ACMs were collected in accordance with MDAQMD Rule 1000 / NESHAPS requirements.

ASBESTOS MATERIALS RESULTS TABLE

(STANDARD PLM ANALYSIS)

Altec

Sample

IDs

Material

Description Sample Location Friability Condition

Approx.

Quantity

Sq. Feet

Result %

& Type

13-15 Gray / Black Patching

& Penetration Tar

Site W3

7939 Opal Ave.

Booster Building Roof

Non-

Friable Intact 10

5%

Chrysotile

29, 31, White Joint

Compound (layered with non-asbestos drywall)

RBS Tank

14418 Ranchero Rd.

Booster Building Ceiling

Non-

Friable 2 Intact 400

2%

Chrysotile

34-36

Black Roofing Tar

(associated with non-asbestos layers)

RBS Tank

14418 Ranchero Rd.

Booster Building Roof

Non-

Friable Intact 360

5%

Chrysotile

49-51 Gray / Black

Penetration Tar

Site 2B

West of Atkins Road on

White Haven St.

Booster Building Roof

Non-

Friable Intact 5

5%

Chrysotile

53, 55, White Joint

Compound 1 & 2

(layered with non-asbestos drywall and joint tape)

Site 2A

11505 El Centro Rd.

Booster Building Ceiling

Non-

Friable 2 Intact

2%

Chrysotile

58-60

Black Roofing Tar 1

& 2 (associated with non-asbestos layers)

Site 2A

11505 El Centro Rd.

Booster Building Roof

Non-

Friable Intact 360

5%

Chrysotile

61-63 Gray / Black

Penetration Tar

Site 2A

11505 El Centro Rd.

Booster Building Roof

Non-

Friable Intact 5

5%

Chrysotile

65, 67, White Joint

Compound (layered with non-asbestos drywall)

Site 3A

Near 6535 Oak Hill Rd.

Booster Building Ceiling

Non-

Friable 2 Intact 400

2%

Chrysotile

Note: See Section 5.0 for a narrative on the ACM locations, quantities and handling requirements.

NON-ASBESTOS MATERIALS RESULTS TABLE

(STANDARD PLM ANALYSIS)

Sample # Material Description Sample Location(s)

1, 4, 7 White Texture Site W3 Booster Building Ceiling

2, 5, 8 White Drywall Site W3 Booster Building Ceiling

3, 6, 9 White Joint Compound Site W3 Booster Building Ceiling

10-12 Multiple Layers Roofing Site W3 Booster Building Roof

16, 18, 20 White Drywall Site W1 Booster Building Ceiling

17, 19, 21 White Joint Compound Site W1 Booster Building Ceiling

22-24 Cream Cove Base Adhesive Site W1 Booster Building Wall

25-27 Multiple Layers Roofing Site W1 Booster Building Roof

28, 30, 32 White Drywall (associated with ACM) RBS Tank – Booster Building Ceiling

34-36 Multiple Layers Roofing (associated with ACM) RBS Tank – Booster Building Roof

37, 40, 43 White Texture Site 2B Booster Building Ceiling

38, 41, 44 White Drywall Site 2B Booster Building Ceiling

39, 42, 45 White Joint Compound Site 2B Booster Building Ceiling

46-48 Multiple Layers Roofing Site 2B Booster Building Roof

52, 54, 56 White Drywall Site 2A Booster Building Ceiling

58-60 Multiple Layers Roofing (associated with ACM) Site 2A Booster Building Roof

64, 66, 68 White Drywall Site 3A Booster Building Ceiling

70-72 Multiple Layers Roofing Site 3A Booster Building Roof

Note: If any non-asbestos materials cannot be separated from ACMs then all associated materials will need to be treated as an ACM and must be removed by a licensed abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

The laboratory results and chain of custody documentation are provided in Appendix A. Maps showing the asbestos sample locations are provided in Appendix B.

3.0 LEAD PAINT RESULTS

Bulk Paint Lab Analysis

Demolition or renovation contractors must conduct bulk paint chip sampling to comply with

Cal/OSHA worker protection regulations for waste characterization and employee exposure assessment. To assist the demolition contractor, Altec collected samples of damaged paint/coating materials and obtained laboratory analysis by Flame Atomic Absorption (AA) in accordance with

EM-BC-S-8443.

LEAD BULK PAINT CHIP SAMPLE RESULTS TABLE

(FLAME AA ANALYSIS)

Bulk Sample

No.

Component Location Substrate

Visible Paint Color

Lead Result % by weight

Lead Result mg/kg or ppm1

Regulated or Not

Regulated

Site W3 - 7939 Opal Ave., Oak Hills

Pb-1 Fascia/Eave Site W3 Booster

Building Wood Cream <0.0039% <39 ppm

Not Regulated

Pb-2 Wall Site W3 Tank Metal Cream 0.099% 990 ppm Cal/OSHA Regulated

Pb-3 Pipe Site W3 Tank Metal Brown 0.025% 250 ppm Not

Regulated

Site W1 - 14418 Ranchero, Hesperia

Pb-4 Window Trim Site W1 Booster

Building Wood Cream <0.0039% <39 ppm

Not Regulated

Pb-5 Wall Site W1 Tank Metal Cream 0.032% 320 ppm Not

Regulated

Pb-6 Pipe Site W1 Tank Metal Brown 0.0057% 57 ppm Not

Regulated

RBS Tank - 14418 Ranchero, Hesperia

Pb-7 Fascia /

Eave RBS Tank Booster Bldg. Wood Brown <0.011% <10 ppm

Not Regulated

Pb-8 Wall RBS Tank Booster Bldg. CMU Cream 0.0079% 79 ppm Not

Regulated

Pb-9 Wall RBS Tank Booster Bldg. CMU White <0.0039% <39 ppm Not

Regulated

Pb-10 Wall RBS Tank Metal Cream 0.0062% 62 ppm Not

Regulated

Pb-11 Pipe RBS Tank Metal Brown 0.014% 140 ppm Not

Regulated

Site 2B-1 - White Haven Street, Oak Hills

Pb-12 Fascia /

Eave Site 2B Booster Building Wood Cream 0.047% 470 ppm

Not Regulated

Pb-13 Wall Site 2B Tank Metal Cream <0.0039% <39 ppm Not

Regulated

Site 3B-1 - 5528 Coriander Dr, Oak Hills

Pb-14 Fascia /

Eave Site 3B Booster Building Wood Cream <0.0039% <39 ppm

Not Regulated

Pb-15 Wall Site 3B Tank Metal Cream 0.16% 1,600 ppm Cal/OSHA Regulated

Site 2A - 11505 El Centro Rd., Hesperia

Pb-16 Fascia /

Eave Site 2A Booster Building Wood Cream 0.034% 340 ppm

Not Regulated

Pb-17 Wall Site 2A Booster Building CMU Cream 0.11% 1,100 ppm Cal/OSHA Regulated

Pb-18 Ceiling Site 2A Booster Building Drywall Tan <0.0039% <39 ppm Not

Regulated

1 milligrams per kilogram (mg/kg) = parts per million (ppm)

Bulk Sample

No.

Component Location Substrate

Visible Paint Color

Lead Result % by weight

Lead Result mg/kg or ppm1

Regulated or Not

Regulated

Site 3A – Near 6535 Oak Hill Rd, Oak Hills

Pb-19 Ceiling Site 3A Booster Building Drywall White <0.004% <40 ppm Not

Regulated

Pb-20 Fascia /

Eave Site 3A Booster Building Wood Cream <0.0039% <39 ppm

Not Regulated

Pb-21 Wall Site 3A Tank A Metal Cream 1.1% 11,000 ppm Cal/OSHA &

CDPH

Regulated

Pb-22 Pipe Site 3A Tank A Metal Brown 0.19% 1,900 ppm Cal/OSHA Regulated

Pb-23 Wall Site 3A Tank B Metal Cream 1.3% 13,000 ppm Cal/OSHA &

CDPH

Regulated

Pb-24 Pipe Site 3A Tank B Metal Brown 0.65% 6,500 ppm Cal/OSHA &

CDPH

Regulated

Site 4B - White Haven Rd., Oak Hills

Pb-25 Wall Site 4B Tank Metal Aqua 0.083% 830 ppm Cal/OSHA Regulated

Site 4A - 5563 Forestry Rd., Hesperia

Pb-26 Wall Site 4A Tank A Metal Green /

Gray 1.4% 14,000 ppm

Cal/OSHA &

CDPH

Regulated

Pb-27 Wall Site 4A Tank B Metal Green /

Gray 4.5% 45,000 ppm

Cal/OSHA &

CDPH

Regulated

Not Regulated = <600 ppm or <0.06% Lead

Cal/OSHA Regulated = >600 ppm 0r >0.06% Lead

Cal/OSHA & CDPH Regulated = >5000 ppm or 0.5% Lead

The EPA Housing and Urban Development (HUD) and California Department of Public Health

(CDPH) definition of lead paint is paint or other surface coatings that contain lead equal to or exceeding 1.0 milligram per square centimeter (by XRF device) or 0.5 percent by weight or 5,000 parts per million (ppm) by weight (bulk sample analysis).

Cal/OSHA in CCR Title 8 Section 1532.1 (d)(5)(B) indicates that surface coatings or materials that contain lead at concentrations below 0.06% dry weight (or 600 ppm) do not constitute a health hazard to employees engaged in typical lead-related construction work. This means that construction work (demolition of structures, manual scraping, manual sanding and other tasks) involving materials containing lead in concentrations below 0.06% or 600 ppm can be performed without the customary employee protection measures (respiratory protection, protective clothing, clothing change areas, hand washing facilities, biological monitoring, and training), which are otherwise necessary until employee exposure monitoring shows that airborne lead concentrations are shown to be below the Cal/OSHA lead Action Level of 2 µg/m3 and/or Permissible Exposure

Limit (PEL) of 10 µg/m3.

If lead concentrations exceed 0.06% or 600 ppm in the paint/coating, contractors must assume the materials have potential for causing lead exposures above the Lead Action Level of 2 µg/m3 and must perform employee exposure assessments to determine the airborne lead concentrations before downgrading the employee’s personal protection equipment (PPE).

Cal/OSHA requires bulk paint chip sampling (with results below 0.06% or 600 ppm) and/or employee exposure assessment air sampling to determine regulatory compliance for worker protection. This information and the sampling results referenced above should be provided to the intended demolition contractor.

Key Units of Measurement used in Lead Paint-Related Evaluations

• μg (microgram): One milligram is 1000 micrograms. One gram is 1,000,000 micrograms.

• Ft2 (square foot): One square foot is equal to an area that has a length of one foot (12 inches) and a width of one foot (12 inches).

• μg/dL (microgram per deciliter): Micrograms per deciliter used to measure the level of lead in blood to establish whether intervention is needed.

• μg/ft2 (microgram per square foot): Micrograms per square feet is the measurement used to measure levels of lead in dust samples.

• mg/cm2 (microgram per square centimeter): Milligrams per square centimeter. Used to measure lead in paint using an XRF device.

• percent: Percent by weight, used for laboratory testing of paint or coatings (1 percent =

10,000 μg/gram)

• ppm (parts per million): Parts per million by weight, equivalent to gg/gram (10,000 ppm = 1 percent). Used to measure lead in paint and soil.

Lead-Safe Work Practices

• Ensure that paint removal, stabilization or cleanup work is performed by licensed contractor personnel that are experienced in handling lead-containing materials.

• Contractor must document employee exposures during work.

• Prevent unauthorized access to lead work areas using barriers (tape, fencing) and signs.

• Remove all objects from the work area, including furniture, rugs, and window coverings, or cover them with plastic sheeting with all seams and edges taped or otherwise sealed.

• Close windows and doors in the work area and close and cover all HVAC ducts opening in the work area with taped-down plastic sheeting.

• Contain dust, debris, and paint chips use plastic on floors, remove or cover furniture in the work area, and use entry doorway barriers.

• Contractor employees in the work area must wear appropriate protective clothing and equipment.

• Mist or wet down painted surfaces before disturbing paint.

• Use only HEPA filter-equipped vacuums for dust removal (no dry sweeping).

• Minimize dust and paint chips - use methods and equipment to prevent the spread of lead-contaminated dust.

• Follow good hygiene practices before leaving lead work areas to ensure lead is not transported to break areas, public spaces, vehicles or home.

• Use proper cleanup procedures that will Ensure no potential hazardous lead dust remains after work is completed, leave the lead work area safe for re-occupancy.

• Ensure that all personnel, tools, and other items, including the exteriors of containers of waste, are free of dust and debris before leaving the work area.

Prohibited Work Practices

• Open flame burning or torching

• Use of heat guns operating at or above 1,100 degrees Fahrenheit

• Dry scraping, dry sanding, dry sweeping

• Use of powered tools (without HEPA filter vacuum attachment)

Waste Handling & Disposal

• Ensure that all waste generated during this process is properly sampled and laboratory-tested for waste characterization purposes.

• Ensure waste is properly contained (wrapped and sealed with polyethylene sheeting and/or placed into steel drums with lids) to prevent release into the environment and/or human/animal exposure.

• Ensure that transportation of waste requiring disposal at a hazardous waste landfill or treatment at a specific facility is accompanied by a proper manifest and is transported by a licensed hauler.

• Maintain a record of all waste manifest and disposal records for a minimum of 3 years (10 years is recommended).

4.0 SPECIAL NOTATIONS

The scope of work consisted of the inspection and survey for asbestos-containing materials and /or lead containing components at the following locations:

Site 2A - 11505 El Centro Rd., Hesperia CA

The following materials at Site 2A are ACMs:

• Approximately 400 square feet of off-white joint compound (Samples 53, 55, 57) located throughout the ceiling of the Booster Building is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed. It is co-located with non-ACM drywall.

• Approximately 360 square feet of black roofing tar (Samples 58-60) located throughout the roof of the Booster Building is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

• Approximately 5 square feet of gray / black penetration tar (Samples 61-63) located throughout the roof of the Booster Building is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm):

• The cream exterior paint on the CMU wall of the Booster Building (Sample Pb-17) was determined to be regulated by Cal/OSHA. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to comply with Cal/OSHA worker protection regulations, perform employee exposure assessments, and perform waste characterization for proper disposal.

Site 2B - West of Adkins Rd, on Whitehaven St., Oak Hills, CA

The following material at Site 2B is ACM.

• Approximately 5 square feet of gray / black penetration tar (Samples 49-51) located throughout the roof penetrations is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

None of the sampled paint/components were determined to contain lead concentrations regulated by Cal/OSHA (>600 ppm) or CDPH (>5,000 ppm):

Site 3A - Near 6535 Oak Hill Rd., Oak Hills, CA

The following material at Site 3A is ACM.

• Approximately 400 square feet of off-white joint compound (Samples 65, 67, 69) located throughout the ceiling of the booster building is an ACM and must be removed by a

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm) or Cal/OSHA and CDPH (>5,000 ppm):

• The cream paint on the wall of Tank A (Sample Pb-21) was determined to be regulated by

Cal/OSHA and CDPH. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to comply with Cal/OSHA worker protection regulations, perform employee exposure assessments, and perform waste characterization for proper disposal.

• The brown paint on the pipe of Tank A (Sample Pb-22) was determined to be regulated by

Cal/OSHA. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to comply with Cal/OSHA worker protection regulations, perform employee exposure assessments, and perform waste characterization for proper disposal.

• The cream paint on the wall of Tank B (Sample Pb-23) was determined to be regulated by tasks that will disturb these materials. It is the responsibility of the demolition or renovation

• The brown paint on the pipe of Tank A (Sample Pb-24) was determined to be regulated by tasks that will disturb these materials. It is the responsibility of the demolition or renovation

Site 3B – 5528 Coriander Drive, Oak Hills, CA

No samples were collected or analyzed for asbestos at Site 3B.

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm).

• The cream paint on the wall of the tank (Sample Pb-15) was determined to be regulated by disturb these materials. It is the responsibility of the demolition or renovation contractor to

Site 4A - 5563 Forestry Rd., Hesperia, CA

No samples were collected or analyzed for asbestos at Site 4A.

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm) or Cal/OSHA and CDPH (>5,000 ppm):

• The green / gray paint on the wall of Tank A (Sample Pb-26) was determined to be regulated by Cal/OSHA and CDPH. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to comply with Cal/OSHA worker protection regulations,

• The green / gray paint on the wall of Tank B (Sample Pb-27) was determined to be regulated by Cal/OSHA and CDPH. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to comply with Cal/OSHA worker protection regulations, Site 4B - On Whitehaven Rd. West of Landover Rd., Oak Hills, CA

No samples were collected or analyzed for asbestos at Site 4B.

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm):

• The aqua paint on the wall of tank (Sample Pb-25) was determined to be regulated by disturb these materials. It is the responsibility of the demolition or renovation contractor to

Site W1 - 14418 Ranchero Rd., Hesperia, CA

None of the samples collected and analyzed for asbestos were determined to contain any concentration of asbestos from Site W1.

None of the sampled paint/components were determined to contain lead concentrations regulated by Cal/OSHA (>600 ppm) or CDPH (>5,000 ppm):

RBS Tank - 14418 Ranchero Rd., Hesperia, CA

The following materials at the RBS Tank site are ACMs.

• Approximately 400 square feet of off-white joint compound (Samples 29, 31, 33) located throughout the ceiling of the booster building is an ACM and must be removed by a

• Approximately 360 square feet of black roofing tar (Samples 34-36) located throughout the roof of the booster building is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

None of the sampled paint/components contain lead concentrations regulated by Cal/OSHA (>600 ppm) or CDPH (>5,000 ppm):

Site W3 - 7939 Opal Ave., Oak Hills, CA

The following material at Site W3 is ACM.

• Approximately 5 square feet of gray / black penetration tar (Samples 13-15) located throughout the roof penetrations is an ACM and must be removed by a licensed asbestos abatement contractor prior to any renovation or demolition activity that would cause it to be damaged or disturbed.

The following paint contains lead concentrations regulated by Cal/OSHA (>600 ppm)

• The cream paint on the wall of the tank (Sample Pb-2) was determined to be regulated by

Cal/OSHA. Lead Safe” work practices should be used when performing work tasks that will disturb these materials. It is the responsibility of the demolition or renovation contractor to

Appendix

Appendix A

Analytical Results and Chain of Custody Forms

Approved by:

Approved Signatory Danny Li

Report for:

Jay Yowell Altec Testing & Engineering, Inc.

6035 Fremont St.

Riverside, CA 92504

Regarding:

Eurofins Built Environment Testing West, LLC Project: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

EML ID: 4394643

All samples were received in acceptable condition unless noted in the Report Comments portion in the body of the report. The results relate only to the samples as received and tested. The results include an inherent uncertainty of measurement associated with estimating percentages by polarized light microscopy. Measurement uncertainty data for sample results with >1% asbestos concentration can be provided when requested.

Eurofins Built Environment Testing West, LLC ("the Company"), a member of the Eurofins Built Environment Testing group of companies, shall have no liability to the client or the client's customer with respect to decisions or recommendations made, actions taken or courses of conduct implemented by either the client or the client's customer as a result of or based upon the Test Results. In no event shall the Company be liable to the client with respect to the Test Results except for the Company's own willful misconduct or gross negligence nor shall the Company be liable for incidental or consequential damages or lost profits or revenues to the fullest extent such liability may be disclaimed by law, even if the Company has been advised of the possibility of such damages, lost profits or lost revenues. In no event shall the Company's liability with respect to the Test Results exceed the amount paid to the Company by the client therefor.

Dates of Analysis:

Asbestos PLM: 02-03-2026

Service SOPs: Asbestos PLM (EPA 40CFR App E to Sub E of Part 763 & EPA 600/R-93-116, EBET-PLM-SOP83921) NVLAP Lab Code 200757-0

EMLab ID: 4394643, Page 1 of 29Eurofins Built Environment Testing West, LLC

Eurofins Built Environment Testing West, LLC 2841 Dow Avenue, Suite 300, Tustin, CA 92780

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Total Samples Submitted: 72 Total Samples Analyzed: 72

Total Samples with Layer Asbestos Content > 1%: 24

Location: 1, White Wall Texture - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057321-1

Sample Layers Asbestos Content White Texture ND

Sample Composite Homogeneity: Good

Location: 2, White Drywall - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057322-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 3, White Joint Compound - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057323-1

Sample Layers Asbestos Content White Joint Compound ND

Sample Composite Homogeneity: Good

Location: 4, White Wall Texture - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057324-1

Sample Layers Asbestos Content White Texture ND

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 2 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is reflected by the value of "x".

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 5, White Drywall - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057325-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 6, White Joint Compound - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057326-1

Sample Layers Asbestos Content White Joint Compound ND

Sample Composite Homogeneity: Good

Location: 7, White Wall Texture - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057327-1

Sample Layers Asbestos Content White Texture ND

Sample Composite Homogeneity: Good

Location: 8, White Drywall - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057328-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 3 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 9, White Joint Compound - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Ceiling Lab ID-Version‡: 22057329-1

Sample Layers Asbestos Content White Joint Compound ND

Sample Composite Homogeneity: Good

Location: 10, Roof Composite - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057330-1

Sample Layers Asbestos Content Black Roofing Shingle 1 ND Black Roofing Shingle 2 ND

Black Roofing Tar and Felt ND Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

Location: 11, Roof Composite - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057331-1

Sample Layers Asbestos Content Black Roofing Shingle 1 ND Black Roofing Shingle 2 ND

Black Roofing Tar and Felt ND Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

Location: 12, Roof Composite - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057332-1

Sample Layers Asbestos Content Black Roofing Shingle 1 ND Black Roofing Shingle 2 ND

Black Roofing Tar and Felt ND Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

EMLab ID: 4394643, Page 4 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 13, Black/Gray Patching and Penetration Tar - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057333-1

Sample Layers Asbestos Content Gray/Black Roofing Mastic 5% Chrysotile

Sample Composite Homogeneity: Good

Location: 14, Black/Gray Patching and Penetration Tar - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057334-1

Sample Layers Asbestos Content Gray/Black Roofing Mastic 5% Chrysotile

Sample Composite Homogeneity: Good

Location: 15, Black/Gray Patching and Penetration Tar - Site W3 - 7939 Opal Ave., Oak Hills - Booster Building Roof Lab ID-Version‡: 22057335-1

Sample Layers Asbestos Content Gray/Black Roofing Mastic 5% Chrysotile

Sample Composite Homogeneity: Good

Location: 16, White Drywall - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057336-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 5 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 17, White Joint Compound - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057337-1

Sample Layers Asbestos Content White Joint Compound ND

Sample Composite Homogeneity: Good

Location: 18, White Drywall - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057338-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 19, White Joint Compound - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057339-1

Sample Layers Asbestos Content White Joint Compound ND

Sample Composite Homogeneity: Good

Location: 20, White Drywall - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057340-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 6 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 21, White Drywall - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057341-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 22, Cream Cove Base Adhesive - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057342-1

Sample Layers Asbestos Content Cream Adhesive ND

Sample Composite Homogeneity: Good

Location: 23, Cream Cove Base Adhesive - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057343-1

Sample Layers Asbestos Content Cream Adhesive ND

Sample Composite Homogeneity: Good

Location: 24, Cream Cove Base Adhesive - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Wall Lab ID-Version‡: 22057344-1

Sample Layers Asbestos Content Cream Adhesive ND

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 7 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 25, Roof Composite - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Roof Lab ID-Version‡: 22057345-1

Sample Layers Asbestos Content Black Roofing Shingle ND

Black Roofing Tar and Felt 1 ND Black Roofing Tar and Felt 2 ND Black Roofing Tar and Felt 3 ND

Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

Location: 26, Roof Composite - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Roof Lab ID-Version‡: 22057346-1

Sample Layers Asbestos Content Black Roofing Shingle ND

Black Roofing Tar and Felt 1 ND Black Roofing Tar and Felt 2 ND Black Roofing Tar and Felt 3 ND

Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

Location: 27, Roof Composite - Site W1 - 14418 Ranchero Rd., Hesperia - Booster Building Roof Lab ID-Version‡: 22057347-1

Sample Layers Asbestos Content Black Roofing Shingle ND

Black Roofing Tar and Felt 1 ND Black Roofing Tar and Felt 2 ND Black Roofing Tar and Felt 3 ND

Composite Non-Asbestos Content: 20% Glass Fibers Sample Composite Homogeneity: Poor

EMLab ID: 4394643, Page 8 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 28, White Drywall - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057348-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 29, White Joint Compound - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057349-1

Sample Layers Asbestos Content White Joint Compound 2% Chrysotile

Sample Composite Homogeneity: Good

Location: 30, White Drywall - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057350-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 31, White Joint Compound - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057351-1

Sample Layers Asbestos Content White Joint Compound 2% Chrysotile

Sample Composite Homogeneity: Good

EMLab ID: 4394643, Page 9 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O: Jay Yowell Re: 910-2026142; Department of Public Works; CSA 70J - Paint Exterior Tanks and Booster Buildings

Date of Sampling: 01-27-2026 Date of Receipt: 01-29-2026 Date of Report: 02-06-2026

ASBESTOS PLM REPORT

Location: 32, White Drywall - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057352-1

Sample Layers Asbestos Content White Drywall ND

Sample Composite Homogeneity: Good

Location: 33, White Joint Compound - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Ceiling Lab ID-Version‡: 22057353-1

Sample Layers Asbestos Content White Joint Compound 2% Chrysotile

Sample Composite Homogeneity: Good

Location: 34, Roof Composite - RBS Tank - 14418 Ranchero Rd., Hesperia - Booster Building Roof Lab ID-Version‡: 22057354-1

Sample Layers Asbestos Content Black Roofing Shingle ND

Black Roofing Tar and Felt 1 ND Black Roofing Tar and Felt 2 ND Black Roofing Tar and Felt 3 ND

Black Roofing Tar 5% Chrysotile Black Roofing Felt ND

Composite Non-Asbestos Content: 20% Cellulose 20% Glass Fibers

Sample Composite Homogeneity: Poor

EMLab ID: 4394643, Page 10 of 29Eurofins Built Environment Testing West, LLC

The test report shall not be reproduced except in full, without written approval of the laboratory. The 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. The Company reserves the right to dispose of all samples after a period of thirty (30) days, according to all state and federal guidelines, unless otherwise specified.

All components not quantified as asbestos content and non-asbestos content are considered to be non-fibrous matrix components. Matrix components may include, but are not limited to, gypsum, paint, silicate minerals, vinyl, binder, calcium carbonate, tar, and foam.

Inhomogeneous samples are separated into homogeneous subsamples and analyzed individually. ND means no fibers were detected. When detected, the minimum detection and reporting limit is less than 1% unless point counting is performed. Floor tile samples may contain large amounts of interference material and it is recommended that the sample be analyzed by gravimetric point count analysis to lower the detection limit and to aid in asbestos identification.

‡ A "Version" indicated by -"x" after the Lab ID# with a value greater than 1 indicates a sample with amended data. The revision number is

(833) 465-5857 www.eurofinsus.com/BuiltClient: Altec Testing & Engineering, Inc.

C/O:…