CBS Ref.: OR24-084 www.certasolutions.com

June 22, 2026

CBS Ref.: OR24-084

Tillamook County c/o Ms. Rachel Hagerty Chief Administrative Officer 201 Laurel Avenue Tillamook, OR 97141

Re: Tillamook County Courthouse 201 Laurel Avenue, Tillamook, OR 97141

Bidding Addendum No. 01

Attention plan holders and prospective bidders:

This Addendum No. 01 modifies the previously published Certa drawings issued for bid.

Acknowledged receipt of this Addendum is a requirement of the Bid Documents.

1. General Information

A mandatory pre-bid walk was held on Thursday, June 18, 2026. This Addendum is being issued to incorporate clarifications and revisions resulting from that site visit and subsequent review.

This Addendum includes the following:

• Site photographs

• Approved substitution requests

• Supplemental Information

• Pre-bid meeting sign-in sheet

Except as modified by this Addendum, the Contract Documents remain unchanged.

2. Approved Alternates

The following alternates/products/substitutions are approved for bidding purposes, subject to compliance with the Contract Documents unless specifically noted otherwise:

• Carlisle Syntec 60-mil FleeceBACK PVC

• Carlisle Syntec 60-mil Sureflex PVC/KEE HP

• Duro-Last 60-mil Duro-Fleece Fleece-backed PVC

• Duro-Last 60-mil Duro-Tuff PVC

• Elevate SBS Glass Torch Base/SBS Premium FR Torch

• Elevate 60-mil Max PVC XR www.certasolutions.com

• Elevate 60-mil Max PVC

• IB Roof Systems 60-mil PVC

• Polyglass Elastoflex V HP/Elastoflex S6G HP FR SBS

• Soprema 60-mil Sentinel P150 HFB

• Soprema 60-mil Sentinel P150

• Versico 60-mil VersiFleece PVC Reinforced Membrane

• Versico 60-mil VersiFlex PVC Membrane

Approval of these alternates does not relieve the Contractor of responsibility for full compliance with the requirements of the Drawings and Specifications.

3. Supplemental Information - Infill at Previously Abandoned Curbs

1. Provide new preservative pressure-treated 2x6 nailers at all four sides at the interior of the existing condition, held down from the upper profile of the slab to permit the placement of plywood sheathing.

1. Anchor into the side profile of the existing concrete slab with Simpson Strong-Drive

Titen Turbo concrete screws (1/4 in. x 3-1/4 in.) in a stagger pattern 3 in. on-center.

2. Within the new rough opening of the infill condition, hang one intermediary 2x6 at the center of the opening. If opening is not square hang the joist perpendicular with the long dimension of the opening

1. Secure with Simpson Strong-Tie LUZ ZMAX hangers with Simpson Strong-Drive

Screws (min. 1-1/2 in. long). Provide a fastener at each factory-punched hole in the hanger.

3. Provide APA span-rated preservative pressure-treated plywood sheathing across the top of the opening, installed flush with the surrounding deck. Set the underside of the sheathing into Heavy Duty Construction Adhesive (Liquid Nails) over the top of the joists and blocking. Fasten into the new joists/blocking with Simpson Strong-Drive SDS screws

(min. 2 in. long).

4. Industrial Hygienist Report - Asbestos Sampling

A limited field survey to determine the presence of asbestos containing materials (ACMs) was performed by G2 Consultants on April 16, 2026.

• Four areas of the low-slope roof zone were sampled, with a total of nine samples harvested for laboratory testing.

• No materials were found to contain asbestos.

• Per the coring notes from G2 Consultants, the general assembly at the low-slope roof consists of the following layers:

o ~1 in. of composite roofing o Less than 1 in. of rigid foam www.certasolutions.com o Existing concrete deck.

The report from G2 Consultants is provided as Exhibit B.

5. Extension of Project Duration

Client extends required completion date from October 1, 2026 to November 15, 2026.

End of Addendum No. 1

Yours truly, Certa Building Solutions

Dan Rundle Director of Enclosure Services

AIA, NCARB, RRC, RWC, RRO, CDT

Senior Building Science Specialist

Enclosures:

• Exhibit A: Site Photos with Captions

• Exhibit B: Approved Alternates List

• Exhibit C: Pre-Bid Sign-In Sheet

• Exhibit D: G2 Asbestos Report www.certasolutions.com

Exhibit A

Photo 01

Additional curb elements requiring height increase noted.

Refer to revised Certa roof plan as part of this addendum.

Photo 02

Existing masonry chimney to remain.

Provide 24-gauge prefinished sheet steel closure flashing and sealant to masonry as noted within the project documents.

Photo 03

1. Sill condition of the in-service roof access door will require modification.

Provide new preservative pressure-treated plate per revised detail.

2. Provide new steel door, field-painted, per the revised detail.

Refer to revised Certa detail as part of this addendum.

Photo 04

Existing passive turbine vent.

Abandon as part of the roofing renewals.

Photo 05

Previously abandoned equipment curbs with sheet metal caps.

Demolish as part of the roofing renewals and provide closure to opening with preservative pressure-treated materials, as noted within the Supplemental Information section within this addendum.

Photo 06

In-service antenna mast and anchorage plate to remain.

Provide fully-reinforced PMMA resin flashing across the top of the plate and onto the surrounding roofing system.

Photo 07

In-service anchorage plate for antenna mast guy wires to remain.

Provide fully-reinforced PMMA resin flashing across the top of the plate and onto the surrounding roofing system.

Photo 8

In-service skylight skirt flashing assembly.

Removal includes the existing sheet metal flashing (indicated by the author in the photo), as well as all metal components below.

Photo 9

Typical in-scope curb element.

Raise height as required by the project documents.

Photo 10

Upper portion of parapet – requirement for the replacement of roofing remains (area noted by red arrow).

Photo 11

Removal and replacement of metal cladding at the interior plane of the tall parapet remains (area noted by red arrow).

Photo 12

Removal and replacement of metal cladding at the interior plane of the tall parapet remains (area noted by red arrow).

Upper portion of parapet – requirement for the replacement of roofing remains.

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June 12, 2026

Rachel Hagerty Tillamook County

201 Laurel Avenue

Tillamook, OR 97141

Re: Tillamook County Courthouse Roof Project - PVC Roof Membrane Substitution Request – Soprema Sentinel P150 HFB

Dear Ms. Hagerty:

This letter serves to document our response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse.

The substitution request proposes to consider the use of 60-mil, fleece-backed Soprema Sentinel

P150 HFB Membrane (P150 HFB) in lieu of the specified Basis of Design Alternate 1, 60-mil fleece-backed Sika Sarnafil G410 Feltback (Alternate 1 – Adhered), and 60-mil, Soprema Sentinel P150 (P150) in lieu of the specified Basis of Design Alternate 2, 60-mil Sika Sika-Plan (Alternate

2 – Induction Welded) as specified in the project specifications.

The proposed product system by Soprema is generally comparable in performance metrics to the specified system and Certa finds this to be an acceptable alternate for consideration for alternate pricing as captured in the Project Manual. The substitution request does not include a

PMMA flashing so this should be included in cost calculations.

Please do not hesitate to reach out in case you have any questions or concerns.

Yours truly, Certa Building Solutions

Dan Rundle

Director of Envelope Services

AIA, NCARB, RRC, RWC, RRO, CDT

Senior Building Science Specialist www.certasolutions.com

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June 16, 2026

Isabel Gilda Tillamook County

201 Laurel Avenue

Tillamook, OR 97141

Re: Tillamook County Courthouse Roof Project - PVC Roof Membrane Substitution Request – Soprema Sentinel P150 HFB

Dear Ms. Gilda:

This letter serves to document our response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse.

The substitution request proposes to consider the use of 60-mil, fleece-backed Versico

VersiFleece PVC Reinforced Membrane in lieu of the specified Basis of Design Alternate 1, 60-mil fleece-backed Sika Sarnafil G410 Feltback (Alternate 1 – Adhered), and 60-mil, Versico

VersiFlex PVC Membrane in lieu of the specified Basis of Design Alternate 2, 60-mil Sika Sika-

Plan (Alternate 2 – Induction Welded) as specified in the project specifications.

• While not included with the technical documents related to this substitution request, the requirement for roof-grade, reinforced, cold fluid-applied flashings at select penetrations and transitions, as indicated in the Certa project documents, remains.

• If the manufacturer does not offer such a product (PMMA, PUMA, etc.) they will need to seek the use of another manufacturer’s suitable product and ensure in writing that the use of the product will maintain a warrantable completion.

• The methodology related to roof-grade liquid flashings is captured in the project specifications and drawings and is expected to be reflected in the contractor pricing.

Post award, a change order will not be considered for the installation of these items.

While published performance information may qualify for a substitution based solely on ASTM compliance and testing data The Owner should be aware that pricing the proposed membrane along side a premium PVC membrane system does not represent an equivalent basis of comparison and formulation differences and long-term performance characteristics result in materially different durability and risk profiles.

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Please do not hesitate to reach out in case you have any questions or concerns.

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June 16, 2026

Isabel Gilda Tillamook County

201 Laurel Avenue

Tillamook, OR 97141

Re: Tillamook County Courthouse Roof Project - PVC Roof Membrane Substitution Request – Carlisle Syntec PVC

Dear Ms. Gilda:

This letter serves to document our response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse.

The substitution request proposes to consider the use of 60-mil, fleece-backed Carlisle-Syntec

FleeceBack PVC in lieu of the specified Basis of Design Alternate 1, 60-mil fleece-backed Sika

Sarnafil G410 Feltback (Alternate 1 – Adhered), and 60-mil, Carlisle-Syntec SureFlex PVC/KEE HP in lieu of the specified Basis of Design Alternate 2, 60-mil Sika Sika-Plan (Alternate 2 –

Induction Welded) as specified in the project specifications.

• While not included with the technical documents related to this substitution request, the requirement for roof-grade, reinforced, cold fluid-applied flashings at select penetrations and transitions, as indicated in the Certa project documents, remains.

• While not included with the technical documents related to this substitution request, the requirement for roof-grade primed gypsum coverboard, as indicated in the Certa project documents, remains.

• The methodology related to roof-grade liquid flashings is captured in the project specifications and drawings and is expected to be reflected in the contractor pricing.

Post award, a change order will not be considered for the installation of these items.

Please do not hesitate to reach out in case you have any questions or concerns.

www.certasolutions.com

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June 17, 2026

Isabel Gilda Tillamook County

201 Laurel Avenue

Tillamook, OR 97141

Re: Tillamook County Courthouse Roof Project - PVC Roof Membrane Substitution Request – Elevate SBS Premium FR/Glass Torch Base and Elevate Max PVC

Dear Ms. Gilda:

This letter serves to document our response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse.

The substitution request proposes to consider the use of:

• Elevate SBS Premium FR Torch with Elevate SBS Glass Torch Base in lieu of the specified Basis of Design, Soprema Sopralene Flam FR GR with Soprema Sopralene

Flam 180 SBS modified bitumen multiply roof system, as specified in the project specifications section 07 52 16.

• 60-mil, fleece-backed Elevate Max PVC XR in lieu of the specified Basis of Design

Alternate 1, 60-mil fleece-backed Sika Sarnafil G410 Feltback (Alternate 1 – Adhered), as specified in the project specifications section 07 54 00 – Alternate 1.

• 60-mil, Elevate Max PVC in lieu of the specified Basis of Design Alternate 2, 60-mil Sika

Sika-Plan (Alternate 2 – Induction Welded) as specified in the project specifications section

07 54 00 – Alternate 2.

The above-mentioned product substitutions are comparable to those listed in the respective project manual sections but we have noted the following points:

• The requirement for roof-grade, reinforced, cold fluid-applied flashings at select penetrations and transitions, as indicated in the Certa project documents, remains. Certa understands that Elevate manufactures a PMMA accessory flashing membrane compatible with the proposed membrane systems.

• While not included with the technical documents related to this substitution request, the requirement for roof-grade primed gypsum coverboard, as indicated in the Certa project documents, remains.

• While not included with the technical documents related to this substitution request, the requirement for roof air and vapor barrier membrane (and temporary roof membrane), as indicated in the Certa project documents, remains.

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• The methodology related to the foregoing are captured in the project specifications and drawings and is expected to be reflected in the contractor pricing. Post award, a change order will not be considered for the installation of these items.

Please do not hesitate to reach out in case you have any questions or concerns.

www.certasolutions.com

April 13, 2026

CBS Ref.: OR24-084

Megan Allard Harper Winn

2327 W Commodore Way

Seattle, WA 98199

Re: Tillamook County Courthouse – Low-Slope Roofing Renewals Substitution Request – Carlisle Syntec FleeceBACK PVC

Dear Megan:

This letter serves to document Certa’s response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse, in Tillamook, OR. Thank you for your interest in this project.

The provided substitution request, submitted as a PDF via email, proposes the use of the submitted 60-mil, fleece-backed Carlisle Syntec FleeceBACK PVC thermoplastic membrane and system components in lieu of the following specified Basis of Design Alternates:

1. Alternate 1: 60-mil fleece-backed Sika Sarnafil G410 Feltback as specified in the project specification section 07 54 00, Part 2.2 (Alternate 1).

2. Alternate 2: 60-mil fleece-backed Sika Sarnafil G410 Feltback as specified in the project specification section 07 54 00, Part 2.2 (Alternate 2).

The proposed system(s) by Carlisle are considered generally comparable in performance metrics to the specified basis-of-design system. Certa finds the submitted products to be an acceptable alternate for consideration by owner for pricing.

Please do not hesitate to reach out in case you have any questions or comments to the statements above.

Yours truly, Certa Building Solutions

Dan Rundle

Director of Envelope Services www.certasolutions.com

April 13, 2026

CBS Ref.: OR24-084

Gage Fishering IB Roof Systems

506 E Dallas Road, Suite 300

Grapevine, TX 76051

Re: Tillamook County Courthouse – Low-Slope Roofing Renewals Substitution Request – IB Roof Systems – 60-mil PVC

Dear Gage:

This letter serves to document Certa’s response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse, in Tillamook, OR. Thank you for your interest in this project.

The provided substitution request, submitted as a PDF via email, proposes the use of the submitted 60-mil, fleece-backed IB PVC Single Ply FB 60 thermoplastic membrane and system components in lieu of the following specified Basis of Design Alternates:

1. Alternate 1: 60-mil fleece-backed Sika Sarnafil G410 Feltback as specified in the project specification section 07 54 00, Part 2.2 (Alternate 1).

The proposed system is considered generally comparable in performance metrics to the specified basis-of-design system. Certa finds the submitted products to be an acceptable alternate for consideration by owner for pricing.

Please do not hesitate to reach out in case you have any questions or comments related to the statements above.

Yours truly, Certa Building Solutions

Dan Rundle

Director of Envelope Services www.certasolutions.com

April 22, 2026

CBS Ref.: OR24-084

Will Williams

Edge 2 Edge Roof Solutions, LLC 2606 N Puget Sound Avenue

Tacoma, WA 98404

Re: Tillamook County Courthouse – Low-Slope Roofing Renewals Substitution Request – Duro-Last 60-mil PVC

Dear Will:

This letter serves to document Certa’s response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse, in Tillamook, OR. Thank you for your interest in this project.

The provided substitution, submitted as multiple PDF documents via email, proposes the use of

Duro-Last 60-mil PVC (both fleece-back and standard) in lieu of the basis-of-design thermoplastic roofing membrane. The following products by Duro-Last are noted:

1. Alternate 1 – Adhered PVC Roofing: Duro-Last Duro-Fleece 60-mil fleece-backed PVC membrane, conforming to the Certa project documents (Specification Section 07 54 00, Part 2.2 (Alternate 1).

2. Alternate 2 – Induction-Welded PVC Roofing: Duro-Last Duro-Tuff 60-mil PVC membrane, conforming to the Certa project documents (Specification Section 07 54 00, Part 2.2

(Alternate 2).

The proposed products and methodology by Duro-Last are considered equal to the basis-of-design roofing system, and Certa finds the submitted products to be acceptable for use on the project.

Please do not hesitate to reach out in case you have any questions or comments to the statements above.

Yours truly, Certa Building Solutions

Dan Rundle

Director of Envelope Services www.certasolutions.com

April 22, 2026

CBS Ref.: OR24-084

Will Williams

Edge 2 Edge Roof Solutions, LLC 2606 N Puget Sound Avenue

Tacoma, WA 98404

Re: Tillamook County Courthouse – Low-Slope Roofing Renewals Substitution Request – Duro-Last 60-mil PVC

Dear Will:

This letter serves to document Certa’s response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse, in Tillamook, OR. Thank you for your interest in this project.

The provided substitution, submitted as multiple PDF documents via email, proposes the use of

Duro-Last 60-mil PVC (both fleece-back and standard) in lieu of the basis-of-design thermoplastic roofing membrane. The following products by Duro-Last are noted:

1. Alternate 1 – Adhered PVC Roofing: Duro-Last Duro-Fleece 60-mil fleece-backed PVC membrane, conforming to the Certa project documents (Specification Section 07 54 00, Part 2.2 (Alternate 1).

2. Alternate 2 – Induction-Welded PVC Roofing: Duro-Last Duro-Tuff 60-mil PVC membrane, conforming to the Certa project documents (Specification Section 07 54 00, Part 2.2

(Alternate 2).

The proposed products and methodology by Duro-Last are considered equal to the basis-of-design roofing system, and Certa finds the submitted products to be acceptable for use on the project.

Please do not hesitate to reach out in case you have any questions or comments to the statements above.

Yours truly, Certa Building Solutions

Dan Rundle

Director of Envelope Services www.certasolutions.com

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May 5, 2026

Shyne Buenconsejo

1400 Down River Drive, Woodland, WA 98674

Re: Tillamook County Courthouse Roof Project - SBS Roof Membrane Substitution Request – Polyglass

Dear Shyne:

This letter serves to document our response to the recent substitution request received for the upcoming roof rehabilitation project at the Tillamook County Courthouse.

The substitution request proposes to consider the use of Polyglass Elastoflex V HP/Elastoflex S6 G HP FR SBS roof membrane system in lieu of the specified Basis of Design, Soprema Sopralene

180 Sanded/Sopralene Flam 180 FR GR as specified in the project specification section 07 52

16/2.3.

There are notable differences between the proposed system and basis of design system. In particular, the proposed Polyglass system is an ASTM D6163 (for base sheet) and ASTM D6164

(for cap sheet) Type II membranes, which are higher density and thicker products than the specified.

The proposed product system by Polyglass is therefore considered a higher performer than that specified and Certa finds this to be an acceptable alternate for consideration for pricing as captured in the Project Manual.

Substitution request did not include accessories such as coverboard and board adhesive that are identified in the NDL Warranty Statement Letter.

Please do not hesitate to reach out in case you have any questions or concerns.

Limited Asbestos Survey Purpose: Pre-Renovation

Client:

Tillamook County 201 Laurel Avenue Tillamook, Oregon 97141

Project:

Tillamook County Courthouse - Roof 201 Laurel Avenue Tillamook, Oregon 97141

G2 Project #: G26-173

April 23, 2026

Prepared By:

G2 Consultants 7312 SW Durham Road Portland, Oregon 97224 888-998-4224 www.g2ci.com

CCB#: 253530

http://www.g2ci.com

Limited Asbestos Survey G2 Consultants Project #: G26-173

Purpose of Inspection: Pre-Renovation

Scope of Inspection: Limited Asbestos Survey

Project Description: Tillamook County Courthouse - Roof

Project Address: 201 Laurel Avenue Tillamook, Oregon 97141

Owner or Facility Operator:

Tillamook County 201 Laurel Avenue Tillamook, Oregon 97141

Owner or Facility Operator Phone #:

503-812-8769

Technical Certifications

Consultant Discipline Certification # Regulatory Agency

Phone Number

Chase Eckersell Asbestos Building Inspector

IRO-25-9965B EPA 971-485-5469

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G2 Consultants | www.g2ci.com | 888-998-4224

Tillamook County Limited Asbestos Survey - Roof Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

Table of Contents

• Executive Summary

• Description of Structure(s)

• Scope of Inspection

• Inspection Findings

• Recommended Response Actions

• Methodology

• Limitations

Appendices

Appendix A: Laboratory Analysis Results & Chain of Custody

Appendix B: Photographs of Homogeneous Materials Sampled

Appendix C: Certifications & Accreditation

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Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

G2 Consultants (G2) was retained by Tillamook County to conduct a limited building inspection for asbestos-containing materials (ACM). The survey was conducted at Tillamook County Courthouse, located at 201 Laurel Avenue, in Tillamook, Oregon. The scope of the inspection was limited to only the materials anticipated to be impacted by the upcoming roof replacement activities, as specified by Tillamook County. Authorization was provided by Kevin Jolly, Facilities Supervisor with Tillamook County.

Date(s) of Inspection: April 16, 2026

Purpose of Inspection: Pre-Renovation

Scope of Inspection: Limited to Roof - All suspect asbestos-containing materials that might be impacted as part of the roof replacement activities.

Results of this limited survey have determined that materials listed in the following table are ACMs, containing asbestos in an amount greater than 1%:

NOTE: Friability listed is based on conditions at the time of G2’s survey. Materials may become friable if disturbed.

* The material locations and quantities provided, represents the areas within the scope of work only. It does not represent the potential location/quantity of materials throughout the site.

Details of the inspection, descriptions and locations of materials, quantities, condition and friability can be found in the following sections of this report.

Executive Summary

Asbestos-Containing Materials Identified or Presumed - Overview

Material Description Material Location* Approx.

Quantity*

Condition Friable Y/N

None - - - -

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Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

G2 was contracted by Tillamook County to conduct a limited building inspection for ACM. The survey was conducted at Tillamook County Courthouse, located at 201 Laurel Avenue, in Tillamook, Oregon. The scope of the inspection was limited to only those suspect ACM anticipated to be impacted by the upcoming roof replacement activities, as specified by Kevin Jolly with Tillamook County. The sampling was conducted to represent all suspect materials within the scope of work.

Description of Structure(s)

Type of facility: Courthouse/Government Administration Past uses: Courthouse/Government Administration Age of construction: 1932

Approximate square footage: Roof - 12,525 sq. ft.

Total for Building - 37,575 sq. ft.

Number of floors: 3 Outbuildings included in inspection: None Inaccessible rooms/areas: None

Aerial Photo of Subject Property Location of Subject Property

Scope of Inspection

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Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

The scope of services was to perform a visual and tactile inspection, and identify the presence, quantity and location of the accessible ACM, within the area(s) of the scope of work. All identified accessible suspect materials were sampled. The building was occupied at the time of the survey.

Destructive sampling techniques were utilized to gain access to potentially hidden materials such as within wall cavities or other interstitial spaces.

Other suspect ACMs may be present in the building that are outside this limited scope of work, or in areas that were not accessible at the time of the survey. Furthermore, the material locations and quantities provided in this report represents the areas within the scope of work only. ACMs identified during this limited survey may potentially be located in additional areas of the building, and at greater quantities than those stated in this report.

Results of this limited survey have determined that materials listed in the following table are ACMs, containing asbestos in an amount greater than 1%:

NOTE: Friability listed is based on conditions at the time of G2’s survey. Materials may become friable if disturbed.

† - Homogeneous material number

* The material locations and quantities provided, represents the areas within the scope of work only. It does not represent the potential location/quantity of materials throughout the site.

Results of this limited survey have determined that materials listed in the following table do not contain asbestos in an amount greater than 1%:

† - Homogeneous material number

* The material locations provided, represents the areas within the scope of work only. It does not represent the potential locations/quantities of materials throughout the site.

Details of the samples collected, including locations of individual samples can be found in Appendix A: Laboratory Analysis Results & Chain of Custody.

Inspection Findings

Asbestos-Containing Materials Identified or Presumed

HM

No.†

Material Description Material Location* Approx.

Quantity*

No. of Samples

Asb. Type &

Condition Friable Y/N

- None - - - - - -

Non Asbestos-Containing Materials Identified

HM

No.†

Material Description Material Location* Asb. Type & % No. of Samples

1 Parapet Sealant, Gray Courthouse - Roof Parapets None Detected 2

2 Vent Tar, Black Courthouse - Roof Vents None Detected 2

3 Roof Patch and Repair, Black Courthouse - Roof None Detected 2

4 Composite Roofing Courthouse - Roof None Detected 3

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Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

None of the suspect materials sampled as part of this limited survey were determined to be ACMs.

If any untested suspect materials are encountered during renovation activities, they should be assumed to be ACM and not disturbed, unless sampling and analysis of the materials proves otherwise.

Friability is determined by whether a material can be crumbled, pulverized or reduced to a powder by pressure of an ordinary human hand. The friability of materials listed in this report are based on the present state and actual conditions of the materials observed at the time of G2’s survey.

Materials listed as non-friable can become friable through impact or damage.

All identified and presumed ACM must be removed by a licensed asbestos abatement contractor, or other certified individual, prior to impact if they are to be disturbed during renovation activities. ACM remaining in the building should be managed in good condition, under an Operations and Maintenance Plan, and checked regularly for damage.

OR-OSHA requires a variety of actions when ACM is present in a commercial structure. These include labelling, warning signs, hazard communication and periodic inspections. All of the requirements of a building owner/operator with regard to asbestos can be found in Oregon Administrative Rules (OAR) 437, Division 2.

Any ACM likely to be disturbed during renovation or demolition activities, other than by incidental contact with no generation of debris related to other construction activities, should be abated by a licensed asbestos abatement contractor. Any activities conducted where the primary object of the activity is the removal of ACM must be conducted by a licensed asbestos abatement contractor or other properly trained individuals.

The National Emissions Standards for Hazardous Air Pollutants (NESHAPs) requires that all Regulated Asbestos-Containing Materials (RACMs) be removed from a building prior to demolition.

No materials were identified during this survey that contained 1% or less asbestos.

Recommended Response Actions

Asbestos-Containing Materials (ACM)

Any building material which contains asbestos in an amount greater than 1% is considered an ACM by the United States Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA), and by the State of Oregon Department of Environmental Quality (DEQ) and the Oregon Occupational Safety and Health Division (OR-OSHA).

Asbestos-Containing Materials - 1% Asbestos or Less

Any building material which contains asbestos in an amount of 1% or less is considered asbestos-containing by OSHA and OR-OSHA. Although these materials are not considered ACMs, workers must be protected from exposure to asbestos, regardless of the percentage.

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G2 Consultants | www.g2ci.com | 888-998-4224 http://www.g2ci.com https://osha.oregon.gov/OSHARules/div2/div2Z-1001-asbestos.pdf https://osha.oregon.gov/OSHARules/div2/div2Z-1001-asbestos.pdf

Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

Many of the engineering controls and work practices required by the EPA and OSHA are applicable only to materials that contain greater than 1% asbestos. However, OSHA has established work practice requirements and prohibitions that apply when asbestos is present in any quantity, and/or whenever worker exposure exceeds the PEL, regardless of the amount of asbestos in the materials involved. Applicable requirements for materials that contain 1% or less asbestos can be found in the OSHA Asbestos Construction Standard 29 CFR 1926.1101.

The field work was conducted using industry best practices. Samples of representative accessible suspect materials within the scope of work were collected during the course of the inspection.

Materials were sampled according to homogeneous groupings using the Asbestos Hazard Emergency Response Act (AHERA) sampling guidelines.

Asbestos samples were collected in such a manner as to minimize release of the material into the surroundings. Sample number, material description, sample location and material location were recorded at the time of sampling. Each sample was placed in a sample container labeled with a unique sample number and submitted to a National Voluntary Laboratory Accreditation Program (NVLAP) accredited laboratory, for analysis under chain of custody documentation. Samples were analyzed in accordance with EPA Method 600/R-93-116, using PLM with dispersion staining and using visual area estimation to determine percent asbestos content. This method allows for the identification of the primary types of asbestos used in building materials. The lower limit of detection for this method is one percent. Samples containing one percent or less asbestos by PLM with visual area estimation are reported as “Trace”.

G2 has performed this inspection in accordance with best industry methods and practices of the profession, and consistent with the level of care and skill ordinarily exercised by reputable environmental consultants under similar circumstances and conditions. The observations contained within this assessment are based upon site conditions readily accessible at the time of the site inspection. No other representation, guarantee or warranty, express or implied, is included or intended in this hazardous materials survey report.

G2 utilized state-of-the-art practices and techniques in accordance with regulatory standards while performing this inspection. A copy of personnel and company certifications have been provided in Appendix C.

As with all environmental investigations, this inspection is limited to the defined scope and does not purport to set forth all hazards, nor indicate that other hazards do not exist.

Methodology

Limitations

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G2 Consultants | www.g2ci.com | 888-998-4224 http://www.g2ci.com https://www.epa.gov/sites/production/files/documents/2003pt763_0.pdf https://www.epa.gov/sites/production/files/documents/2003pt763_0.pdf

Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

Respectfully submitted and reviewed by:

Page of 8 8

Appendix A:

Laboratory Analysis Results

& Chain of Custody

Approved by:

Technical Manager Ryan Talaski-Brown

Report for:

Chase Eckersell G2 Consultants 17750 SW Upper Boones Ferry Rd Suite 150 Portland, OR 97224

Regarding:

Eurofins Built Environment Testing West, LLC Project: G26-173; 201 Laurel Avenue Tillamook, OR 97141

EML ID: 4498277

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: 04-22-2026

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: 4498277, Page 1 of 5Eurofins 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: G2 Consultants C/O: Chase Eckersell Re: G26-173; 201 Laurel Avenue Tillamook, OR 97141

Date of Sampling: 04-16-2026 Date of Receipt: 04-17-2026 Date of Report: 04-22-2026

ASBESTOS PLM REPORT

Total Samples Submitted: 9 Total Samples Analyzed: 9

Total Samples with Layer Asbestos Content > 1%: 0

Location: G26-173-1, Parapet Sealant, Gray; Roof - Parapets Lab ID-Version‡: 22622379-1

Sample Layers Asbestos Content Gray Sealant ND

Composite Non-Asbestos Content: 4% Cellulose Sample Composite Homogeneity: Good

Location: G26-173-2, Parapet Sealant, Gray; Roof - Parapets Lab ID-Version‡: 22622380-1

Sample Layers Asbestos Content Gray Sealant ND

Composite Non-Asbestos Content: 4% Cellulose Sample Composite Homogeneity: Good

Location: G26-173-3, Vent Tar, Black; Roof - Vents Lab ID-Version‡: 22622381-1

Sample Layers Asbestos Content Black Tar ND

Sample Composite Homogeneity: Good

Location: G26-173-4, Vent Tar, Black; Roof - Vents Lab ID-Version‡: 22622382-1

Sample Layers Asbestos Content Black Tar ND

Sample Composite Homogeneity: Good

EMLab ID: 4498277, Page 2 of 5Eurofins 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: G2 Consultants C/O: Chase Eckersell Re: G26-173; 201 Laurel Avenue Tillamook, OR 97141

Date of Sampling: 04-16-2026 Date of Receipt: 04-17-2026 Date of Report: 04-22-2026

ASBESTOS PLM REPORT

Location: G26-173-5, Patch + Repair, Black; Roof Lab ID-Version‡: 22622383-1

Sample Layers Asbestos Content Black Roofing Material ND

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

Location: G26-173-6, Patch + Repair, Black; Roof Lab ID-Version‡: 22622384-1

Sample Layers Asbestos Content Black Roofing Material ND

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

Location: G26-173-7, Composite Roofing; Roof Lab ID-Version‡: 22622385-1

Sample Layers Asbestos Content Silver Coating ND

Black Roofing Material 1 ND Black Roofing Material 2 ND Black Roofing Material 3 ND Black Roofing Material 4 ND

Tan Fibrous Material ND Composite Non-Asbestos Content: 10% Cellulose

8% Glass Fibers 8% Synthetic Fibers

Sample Composite Homogeneity: Good

EMLab ID: 4498277, Page 3 of 5Eurofins 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: G2 Consultants C/O: Chase Eckersell Re: G26-173; 201 Laurel Avenue Tillamook, OR 97141

Date of Sampling: 04-16-2026 Date of Receipt: 04-17-2026 Date of Report: 04-22-2026

ASBESTOS PLM REPORT

Location: G26-173-8, Composite Roofing; Roof Lab ID-Version‡: 22622386-1

Sample Layers Asbestos Content Silver Coating ND

Black Roofing Material 1 ND Black Roofing Material 2 ND Black Roofing Material 3 ND Black Roofing Material 4 ND Black Fibrous Material ND

Composite Non-Asbestos Content: 10% Cellulose 8% Glass Fibers 8% Synthetic Fibers

Sample Composite Homogeneity: Good

Location: G26-173-9, Composite Roofing; Roof Lab ID-Version‡: 22622387-1

Sample Layers Asbestos Content Silver Coating ND

Black Roofing Material 1 ND Black Roofing Material 2 ND Black Roofing Material 3 ND Black Roofing Material 4 ND Black Fibrous Material ND

Composite Non-Asbestos Content: 10% Cellulose 8% Glass Fibers 8% Synthetic Fibers

Sample Composite Homogeneity: Good

EMLab ID: 4498277, Page 4 of 5Eurofins 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: G2 Consultants C/O: Chase Eckersell Re: G26-173; 201 Laurel Avenue Tillamook, OR 97141

Date of Sampling: 04-16-2026 Date of Receipt: 04-17-2026 Date of Report: 04-22-2026

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: Alys Bos

EMLab ID: 4498277, Page 5 of 5Eurofins Built Environment Testing West, LLC

Appendix B:

Photographs of Homogeneous Materials Sampled

Tillamook County Courthouse - 201 Laurel Avenue, Tillamook, OR April 23, 2026

HM#1: Parapet Sealant, Gray HM#2: Vent Tar, Black

HM#3: Roof Patch and Repair, Black HM#4: Composite Roofing

NOTE: Materials Bolded and in Red are ACMs

Page of 1 1

Appendix C:

Certifications & Accreditation

06/02/2026

06/02/2025

ONLINE AHERA ASBESTOS INSPECTOR REFRESHER

Course Date:

Expiration Date:Certificate: IRO-25-9965B for

Course Location:

David Kahn, Instructor

In accordance with TSCA Title II, Part 763, Subpart E, Appendix C of 40 CFR

4-Hour Online AHERA Inspector Refresher Training; AHERA is the Asbestos Hazard Emergency Response Act enacting Title II of Toxic Substance Control Act (TSCA)

HAS SUCCESSFULLY COMPLETED THE TRAINING COURSE

CHASE ECKERSELL

THIS IS TO CERTIFY THAT

CCB #SRA0615 4-Hr Training

__________________________Online

For verification of the authenticity of this certificate contact:

Apex Companies, LLC, by and through its wholly owned subsidiary PBS Engineering and Environmental LLC (Apex) 4412 S Corbett Avenue Portland, OR 97239 503.248.1939