Attachment C - Reference Document.pdf

North Plain Scale House

General Information 1.1

Oregon Department of Transportation

Prepared for:

AHERA Certificates

Inspection Summary 1.2

Highway 26 MP 5403

Portland, OR

Sample Inventories

Laboratory Data

Not Numbered

Not Numbered

2.1

Hazardous Building Materials

Survey Report

4412 S Corbett Avenue, Portland, OR 97239

503.248.1939 Main

866.727.0140 Fax

888.248.1939 Toll-Free

July 2026

ORE023-0418019-26010121 Task 0001 Phase 0001 apexcos.com

Highway 26 MP 5403

BUILDING DATA

North Plain Scale House

Portland, OR

CLIENT DATA

Oregon Department of Transportation

123 NW Flanders Street

Portland, OR 97209

BACKGROUND INFORMATION

GENERAL INFORMATION

With regard to asbestos, Apex endeavored to locate all the ACMs in the buildings; however, suspect ACMs may be present and concealed within wall, ceiling, or floor spaces. If suspect materials are uncovered during demolition activities that are not identified in this report, testing should be performed prior to impact. Apex has conducted a physical inspection of the building, compiled this report consistent with the survey scope, and certifies that the information is correct and accurate within the standards of professional quality and contractual obligations.

Apex Companies, LLC, by and through its wholly owned subsidiary PBS Engineering and Environmental LLC

(Apex), has performed a general hazardous materials survey of accessible building areas in accordance with the Occupational Safety and Health Administration (OSHA) in 29 Code of Federal Regulations (CFR)

1910.1001 and compiled a report with the following information:

SURVEY SCOPE

• The type, location, and approximate quantity of suspect asbestos-containing materials (ACMs)

• Bulk sampling of selected suspect building materials

• Lead paint sampling

• Inspection summary

• Laboratory analytical data of bulk material sampled

Project Manager/Prime Inspector

1.1 July 2026

Project: ORE023-0418019-26010121 Task: 0001 Phase: 0001

Imad Abouzaki

IR-21-0425A

DateSignature

Accreditation #:

© 2026 Apex Companies, LLC

Apex Companies, LLC

Portland, OR

Highway 26 MP 5403

North Plain Scale House

Oregon Department of Transportation

Hazardous Building Materials Survey Report

Imad Abouzaki

Imad.Abouzaki Typewritten text 047/10/2026

INSPECTION SUMMARY

Portland, OR

Highway 26 MP 5403

North Plain Scale House

Oregon Department of Transportation

Hazardous Building Materials Survey Report

The following materials either tested positive, or, based on the experience of Apex field personnel, were not tested and should be considered asbestos-containing. Materials that had mixed results are considered positive. Materials not sampled may contain asbestos and should be tested to verify asbestos content prior to impact through demolition, renovation, etc.

(+) Tested Positive, (M) Mixed Results, (P) Presumed Positive, (T) Previously Tested Positive.

Imad Abouzaki

DATES SURVEYED BY ACTIVITY

HAZMAT Survey

ASBESTOS MATERIALS

Apex has investigated accessible areas inside of the building(s) to locate suspect asbestos-containing building materials (ACBMs). Suspect materials may be present in concealed areas (e.g., behind walls and under carpet). The findings are listed below.

No asbestos-containing building materials were identified within the scope of this survey.

7/9/2026

See sample inventory for specific results.

MATERIALS THAT TESTED NEGATIVE FOR ASBESTOS

Material (type) Location

The following materials tested negative based on ASHARA sampling minimums and testing by NVLAP participating laboratories. Although no asbestos was detected, it is possible that further sampling could indicate asbestos content. It may be prudent to test prior to impact through demolition, renovation, etc.

Blown-in Insulation Throughout the attic

Caulk In various locations throught the exterior

Hardie Plank Siding Throughout

Sheet Floor Covering Bathroom

Vapor Barrier Beneath siding throughout

1.2 July 2026

Project: ORE023-0418019-26010121 Task: 0001 Phase: 0001Apex Companies, LLC

INSPECTION SUMMARY

Highway 26 MP 5403

North Plain Scale House

Oregon Department of Transportation

Hazardous Building Materials Survey Report

The purpose of the survey was to locate and identify and quantify accessible interior friable and non-friable asbestos-containing building materials and lead-based paint that may be impacted by the upcoming planned demolition project.

BACKGROUND

1.3 July 2026

Project: ORE023-0418019-26010121 Task: 0001 Phase: 0001Apex Companies, LLC

On June 24, 2026, Apex Companies, LLC, by and through its wholly owned subsidiary PBS Engineering and

Environmental LLC (Apex), performed a hazardous building materials survey of the North Plain Scale House located on Highway 26 MP 5403 in Portland, Oregon.

ASBESTOS SUMMARY

An Apex Asbestos Hazard Emergency Response Act (AHERA) accredited inspector performed the survey to determine the presence and locations of asbestos-containing materials (ACMs).

All sampled materials tested negative for asbestos. Please refer to the asbestos bulk sample inventory for more sample details.

Asbestos Regulations

DEQ, Environmental Protection Agency (EPA), and OSHA regulations require proper removal and handling of ACM by licensed and trained asbestos abatement contractors prior to building renovations or demolition.

EPA, DEQ, and OSHA all define ACM as any material containing more than 1% asbestos. Although materials equal to or less than 1% (<1%) are not considered by regulatory agencies to be an ACM, they still have some asbestos content, and Oregon OSHA has specific requirements for situations in which workers may encounter, disturb, or remove materials containing any level of asbestos. For the sake of hazard communication, these materials are included in the ACMs section of this report.

In 1995, Oregon OSHA adopted 29 Code of Federal Regulations (CFR) Part 1926.1101 governing asbestos under

OAR 437-003-1926.1101. The regulation has made significant changes in work procedures and how asbestos materials are managed. OSHA believes that the single biggest risk of asbestos exposure is to workers who unknowingly or improperly disturb ACM. Hazard communication, training, personal protection, work practices, exposure monitoring, and recordkeeping are all major components of the regulation.

DEQ’s OAR 340, Division 248 also covers asbestos abatement requirements, removal notifications, licensing, and certifications for contractors.

For more information regarding the removal of ACMs, please refer to the following:

1. Oregon Occupational Safety and Health Administration, OAR 437-003-1926.1101

2. Department of Environmental Quality, OAR-340, Division 248

LEAD SUMMARY

Paint was sampled for lead content for the sake of hazard identification and communication.

Paint chip samples were collected from representative building components and submitted under chain of custody to RJ Lee Group of Monroeville, Pennsylvania, for analysis of lead content via inductively coupled plasma-atomic emission spectrometry using EPA Methods 3050B/6010C. The concentration of lead in the samples ranges from less than 12.2 parts per million (ppm) to 6,700 ppm.

North Plain Scale House

Oregon Department of Transportation

Hazardous Building Materials Survey Report

1.4 July 2026

Project: ORE023-0418019-26010121 Task: 0001 Phase: 0001Apex Companies, LLC

See the lead sample inventory section for representative building components and corresponding results.

Paint testing for this survey was limited in scope. The report information and testing results are not to be construed as an exhaustive investigation of lead-containing paint on all building surfaces. All paint on painted surfaces not identified in this report should be presumed to contain lead.

Lead-Containing Paint Regulations

The Consumer Product Safety Commission limit for lead in consumer paint products is 0.009% or 90 ppm or greater. The Department of Housing and Urban Development (HUD) and the EPA define lead-based paint as that which contains 0.5% or 5,000 ppm. Under OSHA, any lead concentration in paint that may become airborne during construction operations triggers requirements in the OSHA Lead in Construction Standard 29 CFR 1926.62 to protect employees impacting the paint.

In 1993, Oregon OSHA adopted the federal OSHA Lead Standard for the Construction Industry Title 29 CFR

1926.62 under OAR 437 Division 3 1926.62. This standard outlines worker exposure limits, personal protection requirements, and employer responsibility for exposure assessment, training, housekeeping, and recordkeeping.

OSHA’s lead standard applies to all work where employees may be exposed to lead in construction, alteration, or repair activities. This includes demolition or renovation of structures where lead-containing materials are present.

Refer to the DEQ hazardous waste reduction policy and fSollow all requirements under the Oregon DEQ, Management of Building Demolition Waste, 97-002A for proper disposal of lead-based painted demolition waste.

This report is not suitable as a bid document or an asbestos abatement design. The purpose of this report is risk hazard communication only.

Disposal

According to Oregon DEQ’s Hazardous Waste/Toxics Reduction Policy Clarification, disposal of building demolition waste coated with lead-based paint generally will not require a hazardous waste determination (i.e., toxicity characteristic leaching procedures [TCLP] testing) if demolition debris is disposed of at a DEQ-permitted solid waste landfill that meets the current design standards for municipal solid waste disposal facilities of 40 CFR

Part 258.

Oregon Department of Transportation

Bulk Sample Inventory

Code Material Location Lab Results

Siding; hardie planks Eurofins LabCor

PDX

26010121-0001 Hardie Planks

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedTan Semi-Fibrous Material

Beneath siding; vapor barrier Eurofins LabCor

PDX

26010121-0002 Vapor Barrier

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBrown Felt

Beneath siding; vapor barrier Eurofins LabCor

PDX

26010121-0003 Vapor Barrier

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBrown Felt

Beneath metal roof; vapor barrier Eurofins LabCor

PDX

26010121-0004 Vapor Barrier

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBrown Felt

Siding caulk; between siding and trim Eurofins LabCor

PDX

26010121-0005 Caulk

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBlack/White Caulk

Siding caulk; between siding and trim Eurofins LabCor

PDX

26010121-0006 Caulk

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBlack/White Caulk

Concrete slab; at connection with wall base Eurofins LabCor

PDX

26010121-0007 Caulk

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedSilver Sealant

Bathroom; beige, 20 SF Eurofins LabCor

PDX

26010121-0008 Sheet Floor Covering

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedTan Sheet Flooring with

Fibrous Backing

2. 1 July 2026

Project: 26010121 Task: 0001 Phase: 001Apex Companies, LLC

Portland, OR

Bulk Sample Inventory

Code Material Location Lab Results

Attic insulation, vermiculite; insulation Eurofins LabCor

PDX

26010121-0009 Insulation

Analysis:Description:Layer:

Layer 1 No Asbestos DetectedBrown Vermiculite Insulation

2. 2 July 2026

Project: 26010121 Task: 0001 Phase: 001Apex Companies, LLC

Portland, OR

Lead Sample Inventory

Code LocationMaterial Analysis Lab

PAINT

Siding; siding, hardie, beige R.J. Lee GroupLB26010121-1001 Paint <12.2 ppm

Exterior trim; trim, wood, brown R.J. Lee GroupLB26010121-1002 Paint 21.9 ppm

Inside, ceiling; ceiling, wood, white R.J. Lee GroupLB26010121-1003 Paint 6700 ppm

Floor; floor, concrete, blue R.J. Lee GroupLB26010121-1004 Paint <12.4 ppm

32. July 2026

Project: 26010121 Task: 0001Apex Companies, LLC

Portland, OR

Approved by:

Technical Manager Ryan Talaski-Brown

Report for:

John Yuly PBS Engineering and Environmental: Portland 4412 S Corbett Ave.

Portland, OR 97239

Regarding:

Eurofins Built Environment Testing West, LLC Project: ORE023-0418019-26010121 Task 0001 Phase 001

EML ID: 4593724

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: 06-29-2026

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 200741-0

EMLab ID: 4593724, Page 1 of 4Eurofins Built Environment Testing West, LLC

Eurofins Built Environment Testing West, LLC 4321 S. Corbett Ave. Suite A, Portland, OR 97239

(833) 465-5857 www.eurofinsus.com/BuiltClient: PBS Engineering and Environmental: Portland C/O: John Yuly Re: ORE023-0418019-26010121 Task 0001 Phase

Date of Submittal: 06-24-2026 Date of Receipt: 06-24-2026 Date of Report: 06-29-2026

ASBESTOS PLM REPORT

Total Samples Submitted: 9 Total Samples Analyzed: 9

Total Samples with Layer Asbestos Content > 1%: 0

Location: 26010121-0001 Lab ID-Version‡: 23163410-1

Sample Layers Asbestos Content Tan Semi-Fibrous Material ND

Composite Non-Asbestos Content: 15% Cellulose Sample Composite Homogeneity: Good

Location: 26010121-0002 Lab ID-Version‡: 23163411-1

Sample Layers Asbestos Content Brown Felt ND Composite Non-Asbestos Content: 90% Cellulose Sample Composite Homogeneity: Good

Location: 26010121-0003 Lab ID-Version‡: 23163412-1

Sample Layers Asbestos Content Brown Felt ND Composite Non-Asbestos Content: 90% Cellulose Sample Composite Homogeneity: Good

Location: 26010121-0004 Lab ID-Version‡: 23163413-1

Sample Layers Asbestos Content Brown Felt ND Composite Non-Asbestos Content: 90% Cellulose Sample Composite Homogeneity: Good

EMLab ID: 4593724, Page 2 of 4Eurofins 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: PBS Engineering and Environmental: Portland C/O: John Yuly Re: ORE023-0418019-26010121 Task 0001 Phase

Date of Submittal: 06-24-2026 Date of Receipt: 06-24-2026 Date of Report: 06-29-2026

ASBESTOS PLM REPORT

Location: 26010121-0005 Lab ID-Version‡: 23163414-1

Sample Layers Asbestos Content Black/White Caulk ND

Sample Composite Homogeneity: Good

Location: 26010121-0006 Lab ID-Version‡: 23163415-1

Sample Layers Asbestos Content Black/White Caulk ND

Sample Composite Homogeneity: Good

Location: 26010121-0007 Lab ID-Version‡: 23163416-1

Sample Layers Asbestos Content Silver Sealant ND

Sample Composite Homogeneity: Good

Location: 26010121-0008 Lab ID-Version‡: 23163417-1

Sample Layers Asbestos Content Tan Sheet Flooring with Fibrous Backing ND

Composite Non-Asbestos Content: 35% Cellulose Sample Composite Homogeneity: Good

Location: 26010121-0009 Lab ID-Version‡: 23163418-1

Sample Layers Asbestos Content Brown Vermiculite Insulation ND

Sample Composite Homogeneity: Good

EMLab ID: 4593724, Page 3 of 4Eurofins 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: PBS Engineering and Environmental: Portland C/O: John Yuly Re: ORE023-0418019-26010121 Task 0001 Phase

Date of Submittal: 06-24-2026 Date of Receipt: 06-24-2026 Date of Report: 06-29-2026

ASBESTOS PLM REPORT

PROJECT ANALYST AND SIGNATORY REPORT

Project Analyst

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.

‡ 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".

Analyst: Ryan Talaski-Brown

EMLab ID: 4593724, Page 4 of 4Eurofins Built Environment Testing West, LLC

RJ Lee Group, Inc.

350 Hochberg Road, Monroeville, PA 15146

Tel: (724) 325-1776 | Fax: (724) 733-1799

RJ Lee Group Job No.:

Samples Received:

Report Date:

Client Project:

Purchase Order No.:

Matrix:

Prep/Analysis:

Weight

Percent (%)

Parts per

Million (PPM) -mg/kg

Weight

Percent (%)

Parts per

Million (PPM) -mg/kg

LB26010121-1001 PA250620260011-001 NP Lead < 0.00122 < 12.2 0.00122 12.2 06/26/2026 A

LB26010121-1002 PA250620260011-002 NP Lead 0.00219 21.9 0.00125 12.5 06/26/2026 A

LB26010121-1003 PA250620260011-003 NP Lead 0.670 6700 0.0122 122 06/26/2026 A

LB26010121-1004 PA250620260011-004 NP Lead < 0.00124 < 12.4 0.00124 12.4 06/26/2026 A

Report Qualifiers (Q):

E = Value above highest calibration standard B = Analyte detected in the associated Method Blank

P : PA-DEP Accredited (PA DEP Lab ID 02-00396, NELAP) J = Value below lowest calibration standard but above MDL (Method Detection Limit) S = Spike Recovery outside accepted limits

N : NY ELAP Accredited (NY ELAP Lab Code 10884) L = LCS (Laboratory Control Standard)/SRM (Standard Reference Material) recovery R = RPD (relative percent difference) outside accepted limits outside accepted recovery limits D = RL (reporting limit verification) outside accepted limits

A : AIHA LAP, LLC Accredited (Lab ID 100364) H = Holding times for preparation or analysis exceeded NP = Not Provided

LABORATORY REPORT

Analyte Analysis

Date

Minimum Reporting Limit

Q

June 26, 2026

PBS an Apex Company

4412 South Corbett Ave

Portland, OR 97239

PA250620260011

June 25, 2026

Attn: John Yuly

Phone: 503-248-1939

Fax: 866-727-0140

ORE023-0418019-26010121 Task 0001

N/A

Solid

EPA 3050B / EPA 6010C-Paint

Email: john.yuly@apexcos.com

Unless otherwise noted (either in the comments section of the report and/or with the appropiate qualifiers under the report qualifiers (Q) column) the following apply: (a) Samples were received in good condition, (b) All QC samples are within acceptable established limits, (c) All samples designated as NELAP meet the requirements of the NELAC standard; if not applicable qualifiers will be used to designate the non-compliance and (d) Results have not been blank corrected. Quality Control data and Measurement of Uncertainty is available upon request.

This laboratory operates in accord with ISO 17025:2017 guidelines, and holds a limited scope of accreditations under different accrediting agencies; refer to http://www.rjlg.com/about-us/accreditations/ for more information and current status. Unless it is specifically stated otherwise

(under the Q column using the appropriate accrediting agency qualifier(s)) the work contained in this report is performed under RJLG's General Quality System requirements and is not part of any scope of accreditations. This report may not be used to claim product endorsement by any laboratory accrediting agency. The results contained in this report relate only to the items tested or to the sample(s) as received by the laboratory. Any reproduction of this document must be in full for the report to be valid.

Sample Concentration

Client Sample ID RJ Lee Group ID Sampling

Date

These results are submitted pursuant to RJ Lee Group's current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. No responsibility or liability is assumed for the manner in which the results are used or interpreted. Unless notified in writing to return the samples covered by this report, RJ Lee Group will store the samples for a period of thirty (30) days before discarding. A shipping and handling fee will be assessed for the return of any samples.

Comments:

─ : Test (analyte-matrix-preparation-analysis) is performed under RJLG's General Quality System requirements and is not part to any of the above scopes of accredidations

Page 1 of 1 Philip Grindle

Laboratory Manager Inorganic Chemistry