Task Odrer 140D0425F0410 JUNE 2025

Brats lavsky Consul t ing Engineers , Inc .

500 W 27 t h Avenue, Sui te A Anchorage, AK 99503 Anastas ia Khar i tonova

(877) 844-5264

TD&H Engineer ing 1800 River Dr ive North Great Fa l ls , MT 59401 Engineer : Peter K levberg, PE

(406) 761-3010

ASBESTOS SURVEY

MUSEUM OF THE PLAINS INDIAN

19 MUSEUM LOOP

BROWNING, MONTANA

U.S. DEPARTMENT OF THE INTERIOR

INDIAN ARTS AND CRAFTS BOARD

June 20, 2025

Michele Hill Contracting Officer Representative U.S. Department of the Interior Indian Arts and Crafts Board 381 Elden Street, Suite 200A Herdon, VA 20170

RE: ASBESTOS SURVEY AND COST ESTIMATE

MUSEUM OF THE PLAINS INDIAN

19 MUSEUM LOOP

BROWNING, MONTANA 59417

Bratslavsky Consulting Engineers, Inc. (BCE) contracted with TD&H Engineering (TD&H) to perform an asbestos survey in accordance with the requirements of TO 140D0425F0410.

TD&H Engineering performed an asbestos survey of the Museum of the Plains Indian facility on April 28th and 29th, 2025. The purpose of this project is to provide an inventory of building materials that may contain asbestos and a cost estimate for the remediation of identified asbestos-containing materials (ACMs). This asbestos survey report should be kept on site during all future renovation and demolition activities.

PROJECT DESCRIPTION

The building is an approximately 16,000-square-foot, two-story building with a concrete basement known as The Museum of the Plains Indian (MPI). The exterior is brick and mortar.

Interior walls and ceilings are generally finished with plaster, and floors are typically vinyl composite tile (VCT) on the first and second floors. A basement occupies the entire footprint under the building. The basement walls, ceilings and floors are primarily poured concrete with concrete masonry units (CMU) and brick-and-mortar. A natural gas boiler that provides radiant heat to the facility is located within the basement, and exposed insulated hot and cold-water lines are routed along the ceiling throughout the basement. The second floor was used for storage during the time of the survey, and the first floor was used to display arts and artifacts of various Northern Plains Tribal peoples. Representative photographs taken during the survey are provided in Appendix A.

The survey was limited to portions of the building interior and exterior. The scope of work excluded from the inspection of the following materials:

• Roofing materials

• Detachable components, such as cupboards, counters, electrical outlet covers, light diffusers, and furniture

• Underground building materials

June 20, 2025 PAGE NO. 2

ASBESTOS SURVEY

ACM is defined as any material or product that contains more than 1% asbestos. The National Emissions Standards for Hazardous Air Pollutants [NESHAP – 40 Code of Federal Regulations (CFR) 61], the United States Occupational Safety and Health Administration (OSHA) regulate asbestos due to the respiratory hazard that airborne asbestos fibers present. The survey was performed by Mr. Kyle Groves of TD&H, a Montana-accredited asbestos inspector, in accordance with the United States Environmental Protection Agency (EPA) – Asbestos Hazards and Emergency Response Act (AHERA) regulation 40 CFR 763.

Documentation of accreditation is provided in Appendix B.

Building materials were identified, categorized, numbered, and placed into homogeneous areas (HAs) for sample collection and laboratory analysis. The number of samples collected from building materials identified during the inspection is based on the following:

• Surfacing Materials: At least three samples for surfacing materials that are 1,000 square feet (SF) or less, at least five samples for surfacing materials that are greater than 1,000 SF but less than or equal to 5,000 SF, and at least seven samples for surfacing materials that are greater than 5,000 SF.

• Thermal System Insulation: Three samples from each HA of thermal system insulation, which may include but is not limited to boiler insulation, mudded fittings, and expanded vermiculite insulation.

• Miscellaneous Materials: Three samples from each HA of miscellaneous material, such as ceiling tile, wallboard system, cove base mastic, floor tile and mastic, concrete, roofing materials, and brick mortar.

• Materials Less Than 160 SF or 260 LF: At least one sample from each HA of patching material, such as replacement floor tiles or patching plaster, and materials of less than 160 SF in total area or 260 in linear footage of thermal system insulation.

A total of 40 suspect building materials were identified during the survey. Bulk samples were collected from the building in accordance with the currently recognized standard protocol developed under AHERA. Bulk samples were placed into containers and shipped to CA Lab, LLC (CA Labs) in Baton Rouge, Louisiana, for analysis using Polarized Light Microscopy (PLM) in accordance with the EPA Method 600/R-93/116. CA Labs is accredited through the National Institute of Standards and Technology’s (NIST) National Voluntary Laboratory Accreditation Program (NVLAP). The point-counting technique employed by CA Labs in the analysis of these samples has a limit of detection of approximately 0.1% by volume on samples that contained asbestos at concentrations under 1%.

A total of five HAs sampled during the survey were determined by laboratory analysis to contain asbestos in quantities greater than 1%, and one HA was assumed to contain asbestos.

TD&H collected a duplicate sample from surfacing material in accordance with the Quality Assurance/Quality Control (QA/QC) protocol established according to EPA 560/5-85-024, June 20, 2025 PAGE NO. 3

June 1985, Guidance for Controlling Asbestos-Containing Building Materials. The duplicate QA/QC sample was transported to EMSL Analytical, Inc. (EMSL), in Cinnaminson, New Jersey, for analysis using PLM in accordance with EPA Method 600/R-93/116. The duplicate sample, which was collected from white surfacing material (HA S1.2), contained 2% chrysotile, which corresponds with the results from CA Labs. Based on these data, the QA/QC result is acceptable.

The pre-insulated piping associated with the heating system was observed within the basement hallways but not sampled since sampling would have compromised the integrity of the pipes. The pipes were labeled X-50 Pre-Insulated Pipe by TPCO, Method Patent No.

2,910,730. The patent document dated November 3, 1959, identified polyurethane foam used to fill elongated cavities. Polyurethane is not a suspect-ACM; however, the X-50 Pre-insulated Pipe Sleeve Stock may contain asbestos.

The HAs determined by laboratory analysis and the assumed ACM are shown in Table 1 below. The analytical reports provided by CA Labs and EMSL are provided in Appendix C, and sample locations are shown on Figures 1-3 in Appendix D.

All other HAs are listed as “None Detected” and are shown in Table 2. The analytical report provided by CA Labs is provided in Appendix C. Sample identification and locations are shown in Appendix D.

Homogenous Area Description Asbestos Content

NESHAP

Category Quantity Condition Location

S1.1 - Knockdown Wall Surface Texture on Non-Asbestos Plaster 2% Chrysotile II

3,900 Square Feet Damaged

First Floor - Rooms 2-6 and H1

S1.2 - White Surfacing 2% Chrysotile II 6,400 Square Feet Undamaged

First Floor - Rooms 3,4, 11-13 & H1

S1.3 - Popcorn Texture 2%-3% Chrysotile II 5,600 Square Feet Damaged

Second Floor - Rooms 21, 22, 26, H2 and S1

T1.2 - Straight Run Pipe Insulation

15% Amosite, 5% Chrysotile RACM 800 Linear Feet

Localized Damage in Rooms B1 and B8 Throughout Basement

T1.3 - X-50 Pre-Insulated Pipe Sleeve Stock Assumed RACM 300 Linear Feet Undamaged Basement Hallway H3 T2.1 - Pipe Joint & Patch 6% Chrysotile RACM 260 Each Undamaged Throughout Basement

Table 1 Asbestos-Containing Building Materials

BCE Museum of the Plains Indian, Browning, Montana

June 20, 2025 PAGE NO. 4

Homogenous Area (HA) Sample Description Location C1.1 12" x 12" Ceiling Tile Rooms 2, 5, 6 C2.1 2' x 4' Light Square Ceiling Panel Room 13 C3.1 2' x 2' Rough Pattern Ceiling Panel Rooms 3, 4 C3.2 2' x 2' Rough Pattern, Large Fissure, Ceiling Panel Rooms 3, 4 D1.1 Gypsum Wallboard Rooms 3, 4 D2.1 Joint Compound Rooms 3, 4 F2.1 12" x 12" Light Tan Vinyl Floor Tile (VFT) Rooms H1, 5, 11 F2.2 12" x 12" Tan VFT Rooms H2, 21, 22 F2.3 12" x 12" Black VFT Room 26 F2.4 12" x 12" Gray VFT Room 26 F4.1 Brown Carpet Room 25 F5.1 Mixed Tan Ceramic Tile, Grout and Mortar Rooms 3, 4 F5.2 Mixed Ceramic Wall Tile, Grout and Mortar Rooms 3, 4 F5.3 Mixed Blue Ceramic Tile, Grout and Mortar Rooms 23, 24 F6.1 6" Brown Cove Base Rooms 2, 6 F6.2 4" Black Cove Base Room 5 F9.1 2' x 2' Sheet Vinyl Floor Tile Room 2 F9.2 Blue Terrazzo Floor Room 12 F9.3 Red Terrazzo Floor Room 13 G1.1 Concrete Floor Rooms 7-10 G2.1 Concrete Wall Rooms 7-10 G2.2 Red CMU and Mortar Throughout Basement G2.3 Brick Mortar Throughout Basement M2.1 Mastic Under 12" x 12" Light Tan VFT (F2.1) Rooms H1, 5, 11 M2.2 Mastic Under 12" x 12" Tan VFT (F2.2) Rooms H2, 21, 22 M2.3 Mastic Under 12" x 12" Black VFT (F2.3) Room 26 M2.4 Mastic Under 12" x 12" Gray VFT (F2.4) Room 26 M4.1 Mastic Under Brown Carpet (F4.1) Room 25 M6.1 Mastic Under 6" Brown Cove Base (F6.1) Rooms 2, 6 M6.2 Matic Under 4" Black Cove Base (F6.2) Room 5 M9.1 Mastic Under 2' x 2' Sheet Vinyl Floor (F9.1) Room 2 N2.1 White Caulk Room s H1, 2, 3, 4 S3.1 Plaster Under Knockdown Wall Surface Texture (S1.1) Throughout Building T1.1 Straight Run Fiberglass Pipe Insulation Throughout Basement X8.1 HVAC Insulation Throughout Basement

Table 2 Non-Asbestos-Containing Building Materials

BCE Museum of the Plains Indian, Browning, Montana

June 20, 2025 PAGE NO. 5

Following receipt of the laboratory report, building materials containing asbestos were placed into one of the following three categories using NESHAP criteria:

• Category I: Non-friable 1 asbestos-containing packings, gaskets, resilient floor coverings, and asphalt roofing products – all containing more than 1% asbestos.

• Category II: All non-friable materials containing more than 1% asbestos except those found in Category I.

• Regulated Asbestos-Containing Materials (RACM): Friable materials, Category I non-friable materials that will or may be subjected to sanding, grinding, cutting, or abrading; or Category II non-friable materials that have a high probability of becoming or have become crumbled, pulverized, or reduced to powder by forces expected to act on the material in the course of demolition/renovation operations.

According to NESHAP regulation 40 CFR 61.145 (c)(1)(i), any RACM or Category I or II ACM that may be rendered friable during demolition or renovation activities must be properly abated prior to beginning the project. Abatement must be overseen by someone with training as a “competent person” per OSHA. NESHAP also requires that any demolition or renovation activities be free of visible dust or fugitive emissions from any regulated substances, including asbestos. All building materials should be adequately wetted to prevent release of particulate. Depending on the type of future abatement work planned, OSHA regulations may require personal air monitoring and the use of engineering controls.

It is a requirement under NESHAP regulations that at least ten working days prior to an asbestos abatement project, a written notification must be provided to the EPA. In the Tribal Territories in Montana, notification of asbestos abatement is mailed to EPA Region 8 Asbestos NESHAP Coordinator in Denver, Colorado.

RECOMMENDATIONS

The following recommendations for materials containing asbestos are based on our observations.

A total of five areas of ACM were identified.

The Category II wall surface texture materials were non-friable at the time of the survey and, if maintained in a non-friable state, may be removed in an unregulated fashion under state and federal law. Any grinding, sawing, abrading, or pulverizing of the Category II asbestos-containing materials will render those materials friable and regulated (RACM).

Per OSHA, asbestos removal for Category II ACM in a non-friable “intact” condition must be overseen by a “competent person” holding current accreditation as an Asbestos Contractor/Supervisor. If it is feasible to remove these materials in a non-friable manner, asbestos abatement permitting will not be required. Limited air monitoring may be necessary for OSHA compliance.

1 Friable means able to be crushed or reduced to powder by hand pressure when dry or similarly broken or pulverized mechanically.

Raymond.StandingBear Highlight

Raymond.StandingBear Highlight

June 20, 2025 PAGE NO. 6

Asbestos abatement for RACM must be performed by a state-accredited abatement contractor. All personnel involved in the disturbance or removal of building components assumed to contain asbestos, or identified as asbestos-containing, must adhere to EPA asbestos certification criteria.

ASBESTOS ABATEMENT COST ESTIMATE

The budget estimate for the ACMs identified during this survey is presented in Table 3 below using the following assumptions:

Free and clear access to the work area during working hours.

One mobilization to complete the abatement of all ACMs.

Power and water at no cost to Contractor.

Protect in place all above ceiling electrical wiring, fire alarm, and WiFi cables.

Does not include the demolition of any building components other than the ACM.

Any required inspections and air testing is provided by the building owner or owner’s representative.

Work hours 8:00am to 5:00pm Monday through Friday, unless otherwise scheduled in advance.

Not held responsible for packaging, moving or damage to items being moved, nor for providing storage and or inventory of these items. If storage or inventory is needed, the owner will provide what is necessary. Responsibility of any personal items is the owner’s.

No delays interfering with the diligent execution of the work beyond Contractor’s control will be encountered.

Asbestos-Containing Material Total Square Feet Impacted S1.1 - Knockdown Wall Surface Texture on Non-Asbestos Plaster 3,900 S1.2 - White Surfacing 6,400 S1.3 - Popcorn Texture 5,600 T1.2 - Straight Run Pipe Insulation 800

T1.3 - X-50 Pre-Insulated Pipe Sleeve Stock 300 T2.1 - Pipe Joint & Patch 260 Contractor Mobilization Contractor Overhead and Profit (20%) MDEQ Asbestos Project Permit Construction Administration performed by Owner's Representative (10% o Total

Table 3 Asbestos Abatement Cost Estimate

BCE Museum of the Plains Indian, Browning, M

June 20, 2025 PAGE NO. 7

Abatement costs fluctuate widely based on contractor work loads and many other factors, and this initial cost estimate is only intended as an order-of-magnitude effort to guide planning. Data forming the basis for the cost estimates were from local projects that differ in scale and type and reflect conditions in early 2025. Economic factors can quickly affect abatement bids.

LIMITATIONS

This asbestos survey report was prepared based on information gathered during two site visits and interpretations of laboratory analytical results provided by CA Labs and EMSL.

The survey report is intended to provide information concerning the various types of building materials that were considered suspect for containing asbestos and to inform you of which building materials tested positive.

Most building components were visible and accessible at the time of our site visit. Additional suspect materials may be encountered during future construction activities. If work will disturb materials in addition to those included in this report, TD&H should be contacted and may need to be present during these activities.

This asbestos survey report is intended for use by Bratslavsky Consulting Engineers, Inc.

and their clients. The scope of services performed by TD&H Engineering may not be appropriate to satisfy the needs of other users, and any use or re-use of this document, or the findings presented herein, is at the sole risk of the user.

CLOSING

We appreciate this opportunity to provide these industrial hygiene-consulting services to you.

Should you have questions or need further clarification about information contained herein, please feel free to contact us at (877) 844-5264 for BCE or (406) 761-3010 for TD&H.

Sincerely, Corey League CHMM Peter Klevberg PE MTA-5902 Exp. 2025.11.08 MTA-0627 Exp. 2025.06.14 Project Manager Project Manager

TD&H ENGINEERING TD&H ENGINEERING

APPENDICES: A PHOTOGRAPHS

B DOCUMENTATION OF ACCREDITATION

C ASBESTOS LABORATORY REPORTS

D ASBESTOS SAMPLE LOCATIONS

APPENDIX A

PHOTOGRAPHS

Photo 1 - MPI Building Entrance

Photo 3 - Asbestos-Containing Wall Surface Texture

Photo 2 - Asbestos-Containing Knockdown Texture

Photo 4 - Asbestos-Containing Popcorn Surfacing

Photographs

Photo 5 - Asbestos-Containing Straight Run TSI

Photo 7 - X-50 Pre-Insulated Pipe Label

Photo 6 - Asbestos-Containing Pipe Elbow Insulation

Photo 8 - X-50 Pre-Insulated Pipe Sleeve

Photographs

APPENDIX B

DOCUMENTATION OF ACCREDITATION

has met the requirements of Montana Administrative Rule

17.74.362 and/or 17.74.363 for accreditation in the following asbestos occupation(s) through the specified expiration date(s).

KYLE A GROVES

K Y

L E

A G

R O

V E

S

S M

A N

C H

E C

T E

R R

D G

R E

A T

F A

L L

S M

T

MTA-6137

Asbestos Inspector Project Contractor/Supervisor

11/08/2025 11/07/2025

MT DEQ Asbestos Control Program asbestos occupation(s) through the specified expiration date(s).

HOMER C LEAGUE

H O

M E

R C

L E

A G

U E

R

IV

E R

D R

IV

E

N O

R T

H G

R E

A T

F A

L L

S M

T

MTA-5902

Asbestos Inspector Project Contractor/Supervisor Project Designer

11/08/2025 11/07/2025 11/06/2025 asbestos occupation(s) through the specified expiration date(s).

PETER J KLEVBERG

PE

T

E R

J K

L E

V B

E R

G

R

IV

E

R D

R N

G R

E A

T F

A L

L S

M T

-1

MTA-0627

Asbestos Inspector Project Contractor/Supervisor

06/14/2025 06/06/2025

APPENDIX C

ASBESTOS LABORATORY REPORTS

Attn:

Customer Project:

Reference #: Date: 5/8/2025

Analysis and Method

Discussion

Qualifications

Some samples (floor tiles, surfacings, etc.) may contain fibers too small to be detectable by PLM analysis and should be analyzed by TEM bulk protocols.

A "trace asbestos" will be reported if the analyst observes far less than 1% asbestos. CA Labs defines "trace asbestos" as a few fibers detected by the analyst in several preparations and will indicate as such under these circumstances.

Quantification of <1% will actually be reported as <=1% (allowable variance close to 1% is high). Such results are ideal for point counting, and the technique is mandatory for friable samples (NESHAP, Nov. 1990 and clarification letter 8 May 1991) under 1% percent asbestos and the "trace asbestos". In order to make all initial PLM reports issued from CA Labs NESHAP compliant, all <1% asbestos results (except floor tiles) will be point counted at no additional charge.

CA Labs is accredited by the National Voluntary Accreditation Program (NVLAP) for selected test methods for airborne fiber analysis (TEM), and for bulk asbestos fiber analysis (PLM). All analysts have a college degree in a natural science (geology, biology, or environmental science) or are recognized by a state professional board in one these disciplines .Extensive in-house training programs are used to augment education background of the analyst. The group leader of polarized light has received supplemental McCrone Research training for asbestos identification. This report is not covered by the scope of AIHA accreditation. Analysis performed at CA Labs, LLC 12232 Industriplex, Suite 32 Baton Rouge, LA 70809.

1800 River Drive North

Great Falls, MT 59401 Museum of the Plains Indian

CBR25053252

Summary of polarizing light microscopy (PLM / Stereomicroscopy bulk asbestos analysis) using the methods described in 40CFR Part 763

Appendix E to Subpart E (Interim and EPA 600 / R-93 / 116 (Improved). The sample is first viewed with the aid of stereomicroscopy. Numerous liquid slide preparations are created for analysis under the polarized microscope where identifications and quantifications are preformed. Calibrated liquid refractive oils are used as liquid mouting medium. These oils are used for identification (dispersion staining). A calibrated visual estimation is reported, should any asbestiform mineral be present. Other techniques such as acid washing are used in conjugation with refractive oils for detection of smaller quantities of asbestos. All asbestos percentages are based on calibrated visual estimation traceable to NIST standards for regulated of asbestos. Traceability to measurement and calibration is achieved by using known amounts and types of asbestos from standards where analyst and laboratory accuracy are measured. As little as 0.001% asbestos can be detected in favorable samples, while detection in unfavorable samples may approach the detection limit of 0.50% (well above the laboratory definition of trace).

Vermiculite containing samples may have trace amounts of actinolite-tremolite, where not found be PLM should be analyzed using TEM methods and / or water separation techniques. Suspected actinolite/vermiculite presence will be indicated through the sample comment section of this report.

Fibrous talc containing samples may even contain a related asbestos fiber known as anthophyllite. Under certain conditions the same fiber may actually contain both talc and anthophyllite (a phenomenon called intergrowth). Again, TEM detection methods are recommended. CA Labs PLM report comments will denote suspected amounts of asbestiform anthophyllite with talc, where further analysis is recommended.

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Materials Characterization - Bulk Asbestos Analysis Laboratory Analysis Report - Polarized Light

TD & H Engineering Corey League

Labs

A

C

Overview of Project Sample Material Containing Asbestos

Customer Project: Museum of the Plains Indian CA Labs Project #: CBR25053252

Pink Surfaced White Compound

Blue Surfaced Tan Compound

Tan Surfaced White Compound

White Surfaced White and Tan Compound

White Surfaced Tan Compound

White Wrap on White Insulation

White Surfaced Gray Insulation

Glossary of abbreviations (non-asbestos fibers and non-fibrous minerals):

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot - other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay)

This report relates to the items tested. This report is not to be used by the customer to claim product certification, approval or endorsement by NVLAP, NIST, AIHA LAP, LLC, or any other agency of the federal government. This report may not be reproduced except in full without written permission from CA Labs. These results are submitted pursuant to CA Labs' current terms and sale, condition of sale, including the company's standard warranty and limitations of liability provisions and 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, CA Labs will store the samples for a period of ninety (90) days before discarding. A shipping or handling fee may be assessed for the return of any samples.

S1.3D S1.3

D-1

White Surfaced White and Tan

Compound 3% Chrysotile

S1.2G S1.2

G-1 Blue Surfaced Tan Compound 2% Chrysotile

S1.3C S1.3

C-1 Tan Surfaced White Compound 2% Chrysotile

S1.2D S1.2

D-1 Blue Surfaced Tan Compound 2% Chrysotile

S1.2F S1.2F-

1 Blue Surfaced Tan Compound 2% Chrysotile

S1.2A S1.2A-

1 Blue Surfaced Tan Compound 2% Chrysotile

S1.2C S1.2

C-1 Blue Surfaced Tan Compound 2% Chrysotile

S1.1B S1.1B-

Pink Surfaced White

Compound 2% Chrysotile

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Sample # Layer

Analysts Physical Description of

Subsample

Asbestos type / calibrated visual estimate percent

List of Affected Building

Material Types

Labs

A

Overview of Project Sample Material Containing Asbestos

Customer Project: Museum of the Plains Indian CA Labs Project #: CBR25053252

Glossary of abbreviations (non-asbestos fibers and non-fibrous minerals):

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot - other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay)

This report relates to the items tested. This report is not to be used by the customer to claim product certification, approval or endorsement by NVLAP, NIST, AIHA LAP, LLC, or any other agency of the federal government. This report may not be reproduced except in full without written permission from CA Labs. These results are submitted pursuant to CA Labs' current terms and sale, condition of sale, including the company's standard warranty and limitations of liability provisions and 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, CA Labs will store the samples for a period of ninety (90) days before discarding. A shipping or handling fee may be assessed for the return of any samples.

T2.1C T2.1C-

1 White Surfaced Gray Insulation 6% Chrysotile

T1.2B T1.2B-

1 White Wrap on White Insulation

15% Amosite

5% Chrysotile

T1.2C T1.2C-

1 White Wrap on White Insulation

15% Amosite

5% Chrysotile

S1.3G S1.3

G-1 White Surfaced Tan Compound 3% Chrysotile

T1.2A T1.2A-

1 White Wrap on White Insulation

15% Amosite

5% Chrysotile

S1.3F S1.3F-

White Surfaced White and Tan

Compound 3% Chrysotile

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Sample # Layer

Analysts Physical Description of

Subsample

Asbestos type / calibrated visual estimate percent

List of Affected Building

Material Types

Labs

A

C

Raymond.StandingBear Highlight

Polarized Light Asbestiform Materials Characterization

Customer Info: Attn: Customer Project:

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

10% fg

60% ce 30% qu, ma, pe

C2.1A C2.1

A-1 White Covering Y None Detected 100% ot

C1.1

C-2 Tan Ceiling Tile Y None Detected

10% fg

60% ce 30% qu, ma, pe

C1.1C C1.1

C-1 White Surfacing Y None Detected 100% qu, bi, ca

C1.1

B-2 Tan Ceiling Tile Y None Detected

10% fg

60% ce 30% qu, ma, pe

C1.1B C1.1

B-1 White Surfacing Y None Detected 100% qu, bi, ca

C1.1

A-2 Tan Ceiling Tile Y None Detected

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

C1.1A C1.1

A-1 White Surfacing Y None Detected 100% qu, bi, ca

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

Asbestos type / calibrated visual estimate percent

Turnaround Time: Samples Received:

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

20% fg

50% ce 30% qu, ma, pe

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

C3.1

A-2 Tan Ceiling Tile Y None Detected

100% fg

C3.1A C3.1

A-1 White Surfacing Y None Detected 100% qu, bi, ca

C2.1

C-2 Yellow Fibrous Insulation Y None Detected

100% fg

C2.1C C2.1

C-1 White Covering Y None Detected 100% ot

C2.1

B-2 Yellow Fibrous Insulation Y None Detected

C2.1B C2.1

B-1 White Covering Y None Detected 100% ot

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

C2.1

A-2 Yellow Fibrous Insulation Y None Detected 100% fg

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, bi, ca

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

C3.2B C3.2

B-1 White Surfacing Y None Detected

100% qu, bi, ca

C3.2

A-2 Tan Ceiling Tile Y None Detected

20% fg

50% ce 30% qu, ma, pe

C3.2A C3.2

A-1 White Surfacing Y None Detected

100% qu, bi, ca

C3.1

C-2 Tan Ceiling Tile Y None Detected

20% fg

50% ce 30% qu, ma, pe

C3.1C C3.1

C-1 White Surfacing Y None Detected

100% qu, bi, ca

C3.1

B-2 Tan Ceiling Tile Y None Detected

20% fg

50% ce 30% qu, ma, pe

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

C3.1B C3.1

B-1 White Surfacing Y None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

10% ce 90% qu, gy

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

D1.1

B-2 White Drywall with Paper N None Detected

10% ce 90% qu, gy

D1.1B D1.1

B-1

White Surfaced White

Compound N None Detected

100% qu, mi, bi, ca

D1.1

A-2 White Drywall with Paper N None Detected

20% fg

50% ce 30% qu, ma, pe

D1.1A D1.1

A-1

White Surfaced White

Compound N None Detected

100% qu, mi, bi, ca

C3.2

C-2 Tan Ceiling Tile Y None Detected

30% qu, ma, pe

C3.2C C3.2

C-1 White Surfacing Y None Detected 100% qu, bi, ca

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

C3.2

B-2 Tan Ceiling Tile Y None Detected

20% fg

50% ce

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, bi

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

M2.1

C-2 Yellow Mastic Y None Detected

100% qu, ma, ca

F2.1+M2.1

C M2.1

C-1 Tan Floor Tile Y None Detected 100% qu, ma, ca

F2.1+M2.1

B M2.1

B-1 Tan Floor Tile Y None Detected

100% qu, ma, ca

M2.1

A-2 Yellow Mastic Y None Detected 100% qu, bi

F2.1+M2.1

A M2.1

A-1 Tan Floor Tile Y None Detected

100% qu, mi, bi, ca

D1.1

C-2 White Drywall with Paper N None Detected 10% ce 90% qu, gy

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

D1.1C D1.1

C-1

White Surfaced White

Compound N None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, ma, ca

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

F2.3+M2.3

B M2.3

B-1 Black Floor Tile Y None Detected

100% qu, ma, ca

M2.3

A-2 Tan Debris Y None Detected 100% qu, ma, ca

F2.3+M2.3

A M2.3

A-1 Black Floor Tile Y None Detected

100% qu, ma, ca

F2.2+M2.2

C M2.2

C-1 Tan Floor Tile Y None Detected 100% qu, ma, ca

F2.2+M2.2

B M2.2

B-1 Tan Floor Tile Y None Detected

100% qu, ma, ca

1 Brown Mastic Y None Detected 100% qu, bi

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

F2.2+M2.2

A M2.2

A Tan Floor Tile Y None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, bi

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

M4.1

A-2 Yellow Mastic Y None Detected

100% qu, ma, ca

F4.1+M4.1

A M4.1

A-1 Brown Carpet N None Detected 70% sy 30% qu, ma, ot

F2.4+M2.4

C M2.4

C-1 Gray Floor Tile Y None Detected

100% qu, bi

F2.4+M2.4

B M2.4

B-1 Gray Floor Tile Y None Detected 100% qu, ma, ca

M2.4

A-2 Yellow Mastic Y None Detected

100% qu, ma, ca

F2.4+M2.4

A M2.4

A-1 Gray Floor Tile Y None Detected 100% qu, ma, ca

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

F2.3+M2.3

C M2.3

C-1 Black Floor Tile Y None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, ma, ca

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

F5.1A-

3 Gray Leveling Plaster Y None Detected

100% qu, ma, ot

F5.1A-

2 Tan Grout Y None Detected 100% qu, ma, ca

F5.1A F5.1A-

1 Tan Ceramic Tile Y None Detected

70% sy 30% qu, ma, ot

M4.1

C-2 Yellow Mastic Y None Detected 100% qu, bi

F4.1+M4.1

C M4.1

C-1 Brown Carpet N None Detected

30% qu, ma, ot

M4.1

B-2 Yellow Mastic Y None Detected 100% qu, bi

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

F4.1+M4.1

B M4.1

B-1 Brown Carpet N None Detected 70% sy

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, ma, ot

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

F5.2A F5.2A-

1 White Ceramic Tile Y None Detected

100% qu, ma, ca

F5.1C-

3 Gray Leveling Plaster Y None Detected 100% qu, ma, ca

F5.1C-

2 Tan Grout Y None Detected

100% qu, ma, ca

F5.1C F5.1C-

1 Tan Ceramic Tile Y None Detected 100% qu, ma, ot

F5.1B-

3 Gray Leveling Plaster Y None Detected

100% qu, ma, ot

F5.1B-

2 Tan Grout Y None Detected 100% qu, ma, ca

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

F5.1B F5.1B-

1 Tan Ceramic Tile Y None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage - reported percentages reflect unaltered fibers

2. Fire Damage no significant fiber damages effecting fibrous percentages

3. Actinolite in association with Vermiculite

4. Layer not analyzed - attached to previous positive layer and contamination is suspected

5. Not enough sample to analyze

6. Anthophyllite in association with Fibrous Talc

7. Contamination suspected from other building materials

8. Favorable scenario for water separation on vermiculite for possible analysis by another method

9. < 1% Result point counted positive

10. TEM analysis suggested

Zo Andriampenomanana Senior Analyst

Analyst Alicia Stretz

100% qu, ma, ca

Analysis Method: Interim (40CFR Part 763 Appendix E to Subpart E) / Improved (EPA-600 / R-93/116)

Preparation Method: HCL acid washing for carbonate based samples, chemical reduction for organically bound components, oil immersion for identification of asbestos types by dispersion attaining / becke line method.

ca - carbonate gypsum - gypsum bi - binder or - organic ma - matrix mi - mica ve - vermiculite ot -other pe - perlite qu - quartz fg - fiberglass mw - mineral wool wo - wollastinite ta - talc sy - synthetic ce - cellulose br - brucite ka - kaolin (clay) pa - palygorskite (clay) Approved Signatories:

F5.3A-

2 Gray Grout Y None Detected

100% qu, ma, ca

F5.3A F5.3A-

1 Blue Ceramic Tile Y None Detected 100% qu, ma, ot

F5.2C-

2 White and Tan Grout N None Detected

100% qu, ma, ca

F5.2C F5.2C-

1 White Ceramic Tile Y None Detected 100% qu, ma, ot

F5.2B-

2 White and Tan Grout N None Detected

100% qu, ma, ca

F5.2B F5.2B-

1 White Ceramic Tile Y None Detected 100% qu, ma, ot

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

F5.2A-

2 White and Tan Grout N None Detected

406-761-3010 Date Of Sampling:

406-727-2872 Purchase Order #:

Sample # Com ment

Layer

Analysts Physical Description of

Subsample

Homo-geneo us

(Y/N)

TD & H Engineering Museum of the Plains Indian CBR25053252

1800 River Drive North

Great Falls, MT 59401 Date:

Turnaround Time: Samples Received:

CA Labs

Dedicated to

Quality

CA Labs, L.L.C.

12232 Industriplex, Suite 32

Baton Rouge, LA 70809

Phone 225-751-5632

Fax 225-751-5634

NVLAP #200772-0

TDSHS #300370

CDPHE #AL-18111

LELAP #03069

Corey League CA Labs Project #:

Labs

A

5/8/2025

5 day 5/2/2025

Phone # 4/29/2025

Fax # 25-060

Laboratory Director

Chris Williams

1. Fire Damage significant fiber damage -…