A1_23-089-073 DEFAC Assessment.pdf

MONTANA | WASHINGTON | IDAHO | NORTH DAKOTA | PENNSYLVANIA

4 0 6 . 7 6 1 . 3 0 1 0 t d h e n g i n e e r i n g . c o m

1 8 0 0 R i v e r D r i v e N o r t h

G r e a t F a l l s , MT 5 9 4 0 1

August 4, 2023

Mr. Michael O’Brien Malmstrom Air Force Base

341 CEOE

Malmstrom AFB, MT 59402-7536

RE: LIMITED ENVIRONMENTAL ASSESSMENT OF

CRAWLSPACE

BUILDING 1075, MALMSTROM DEFAC

MALMSTROM AIR FORCE BASE, MONTANA

TD&H ENGINEERING JOB NO. 23-089-073

Dear Mr. O’Brien, TD&H Engineering, Inc. (TD&H) performed a limited asbestos, mold and bacteria inspection at the crawlspace in Building 1075, Malmstrom Air Force Base (MAFB) on June 27, 2023.

PROJECT DESCRIPTION

Building 1075 is a single-story structure with a partial basement and crawlspace tunnels.

The exterior walls and some rooms are constructed of concrete masonry units (CMU) that are covered by brick and stucco on the exterior and drywall on the interior. A mechanical room is in the basement with piping running from this room through the utility tunnels to other parts of the building.

We understand workers need to access the unventilated crawl space to work on failing plumbing. The crawlspace has standing water in places, and is approximately 4 – 4 ½’ tall.

Based on these conditions, the crawlspace is a confined space with a potential for dangerous atmosphere, including asbestos and the potential for sewage contaminated water, bacterial and mold growth. Representative photographs collected during the assessment are provided in Appendix A.

ASBESTOS INSPECTION

The Administrative Rules of Montana (ARM) 17.74.354 require an asbestos inspection be completed for all building materials prior to scheduled renovation activities to determine if asbestos-containing materials (ACM) are present. The National Emissions Standards for Hazardous Air Pollutants (NESHAP – 40 CFR 61) and the ARM regulate asbestos due to the respiratory hazard that airborne asbestos fibers present. The inspection was performed by Mr. Corey League of TD&H, a technician Montana-accredited asbestos inspector, in accordance with the Environmental Protection Agency (EPA) – Asbestos Hazards and Emergency Response Act (AHERA) regulation 40 CFR 763. Documentation of accreditation is provided in Appendix B.

August 4, 2023 PAGE NO. 2 t d h e n g i n e e r i n g . c o m

Building materials were identified, categorized, numbered, and placed into homogeneous areas (HAs) for sample collection and laboratory analysis. The asbestos inspection was limited to building materials to be impacted by the plumbing repair activities wi thin the crawlspace. The number of samples collected from building materials identified in the inspection is based on the following:

• Surfacing Materials: Three samples for spray-applied and trowel-applied surfacing materials between 10 and 1,000 square feet (SF), five samples for surfacing materials between 1,000 and 5,000 SF, and seven samples for surfacing materials over 5,000 SF.

• Thermal System Insulation (TSI): Three samples from each HA of thermal system insulation, which may include boiler insulation, mudded fittings, and expanded vermiculite insulation.

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

• Patching Materials: At least one sample from each HA of patching material, such as replacement floor tiles or patching plaster, and materials of less than 10 SF in total area.

A total of three suspect building materials were identified during the inspection. 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 Crisp Analytical 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 percent by volume when asbestos concentrations are below 1.0 percent.

All HAs are listed as “None Detected” and are shown in Table 1. The analytical report provided by CA Labs is provided in Appendix C. Sample identification and locations are shown in Appendix D as Figure 1.

Table 1 Non-Asbestos-Containing Building Materials

Building 1075 Malmstrom DEFAC, MAFB

Homogenous Area (HA)

Sample Description Location-Room

T1.1 White Cover/ Silver Foil/ Yellow Insulation Crawlspace

T8.1 Black Plastic/ Pink Insulation Crawlspace

T11.1 Black HVAC Collar/ White Insulation Crawlspace

August 4, 2023 PAGE NO. 3

CHEMICAL MONITORING

Ambient air measurements were collected from within the crawlspace during the time of the assessment.

Air temperature and relative humidity were measured using a HT-350 Temperature and Humidity Meter. Temperatures within the crawlspace ranged from 67 to 70 degrees Fahrenheit, and relative humidity ranged from 64% to 87%. Humidity should be below 60% (ideally 30%-50%) according to the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE), the Environmental Design (LEED). The relative humidity levels measured within the crawlspace are conducive to mold growth.

Hydrogen sulfide (H2S), carbon monoxide (CO), oxygen, and explosive gases (expressed as a percentage of lower explosive limit) were measured using a Scondaor portable 4 gas detector meter.

Oxygen levels within the crawlspace ranged from 20.1% to 20.2%, which are normal levels.

H2S, CO, and explosive gases were not detected.

MOLD & BACTERIA INSPECTION

A TD&H Council – Certified Indoor Environmental (CIE) conducted the sampling and inspection to ensure suspected areas for mold and bacteria were identified and tested.

Documentation of accreditation is provided in Appendix B. All mold and bacteria samples were shipped under chain-of-custody protocol to EMSL Analytical, Inc (EMSL), in Houston, Texas for analysis.

Mold Inspection

The limited mold inspection consisted of visual inspection, culturable air sampling, culturable bulk sampling, direct exam sampling, and spore trap air sampling.

• Visual Inspection: A visual inspection was conducted to determine if there was any staining on building surfaces and if detected, whether the staining may have been caused by mold growth.

• Culturable Air Sampling: Three air samples were collected from the crawlspace in the central portion of the building. One air sample was collected from the building exterior and used as a control sample. A VP-400 microbial sampler was used to pump a measured amount of air over the culture plate, depositing spores on a culturable medium contained within the sampler. The media were analyzed for visible fungus identification and density determination.

• Culturable Bulk Sampling: Four bulk samples were collected from the crawlspace floor to the northeast, south, west, and east of the kitchen access hatch. The media were analyzed for visible fungus identification and density determination.

• Direct Exam Sampling (Bulk): Four bulk samples were collected from the crawlspace at the same locations where culturable bulk samples were collected.

Samples were analyzed for viable and non-viable spore identification and density

August 4, 2023 PAGE NO. 4 determination.

• Spore Trap: Three air samples were collected from the crawlspace, and one was collected from the building exterior at the same locations where the culturable air samples were collected. A calibrated high-flow air pump was used to pump air through an Allergenco-D ® cassette for a measured period of time. Viable and non-viable mold spores were collected on the cassette’s medium. The cassettes were analyzed for mold identification and density determination.

Bacteria Inspection

The limited bacteria inspection consisted of culturable air sampling and a sewage screen analysis from standing water.

• Culturable Air Sampling: Three air samples were collected from the crawlspace, and one was collected from the building exterior at the same locations where the mold air samples were collected. A VP-400 microbial sampler was used to pump a measured amount of air over the culture plate, depositing bacteria on a culturable medium contained within the sampler. The samples were analyzed for bacteria identification and density determination.

• Sewage Screen: One water sample was collected from the crawlspace, east of kitchen hatch. The sample was analyzed for total Coliform, E.Coli and Enterococci.

RESULTS

The results of the mold and bacteria assessment are provided below.

Mold

Air and bulk sample locations are presented in Figure 2 within Appendix E, and laboratory analytical reports are provided in Appendix F.

Visual Inspection

The crawlspace has a concrete floor throughout the areas inspected. The floor was generally dry with a fine layer of sediment/dust near the basement entrance and below the utility closet located on the west side of the building. Ground conditions were damp, with a layer of brown sediment about half-way between the basement entrance and kitchen access hatch. Near the kitchen hatch conditions became wet, with an orange and brown discolored layer of sediment covering the floor. Wet floor conditions ranged at least 20’ in all directions from the kitchen access hatch. Building components generally cons isted of CMU block, concrete, metal pipes, PVC pipes, and TSI. These building materials are generally not conducive to mold growth, except for the TSI which had black discoloration in places. A leaking sewer line was observed west of the kitchen access hatch (see Photograph 6).

Cultured Air Samples

The air samples taken from the building interior indicated that the total mold spore

August 4, 2023 PAGE NO. 5 concentration was below that of concentration measured in the outside air (control) sample.

TABLE 2

ANALYSIS OF CULTURABLE AIR SAMPLES FOR MOLD

BUILDING 1075 DEFAC, MAFB

Fungal Spore In The Air- Count/cubic meter (m3)

Sample ID Sample Location Fungal Identifications (CFU/m3) Total

A-C-F-01 Exterior, N

Aspergillus fumigatus 60

Aspergillus sogae 12

Aspergillus terreus 12

Chrysosporium sp. 12

Penicillium brevicompactum 540

Sterile (Dark) 12

A-C-F-02 Crawlspace, NE of

Kitchen Hatch

Aspergillus sojae 12

Chrysosporium sp. 12

Fusarium sp. 12

Penicillium brevicompactum 12

Sterile (White) 12

A-C-F-03 Crawlspace, S of

Kitchen Hatch

Penicillium decumbens 12

48 Sterile(dark) 12

Sterile(white) 24

A-C-F-04 Crawlspace, W of

Kitchen Hatch None Detected

CFU = Colony Forming Unit

Spore Trap Air Samples

The air samples taken from the building interior indicated that the total mold spore concentration was below that of concentration measured in the outside air (control) sample.

The laboratory analytical data reveal that at the time of our inspection, the airborne spore concentrations of Aspergillus/Penicillium (A/P) were only present on the south and west of kitchen hatch. This genus was not detected in the control sample. The appearance of the airborne spore of Chaetomium and Stachybotrys/Memnoniella within two of the crawlspace samples indicated wet conditions. The laboratory report also indicated that one spore of Stachybotrys/Memnoniella in south and one in the west of the kitchen hatch, but none detected in the control sample. The presence of Stachbotrys is cause for concern as this genus can produce mycotoxins that can cause negative health effects. Mycotoxins may lead to increased sensitivity and reaction to the spores as they are either inhaled or absorbed. Mycotoxins can be found on the mold spore and mold fragments; therefore, they can also be found on the substrate upon which the mold grows. Routes of entry for these substances can include ingestion, dermal exposure, and inhalation. This mold spore type has a “sticky” surface and is difficult to remove

August 4, 2023 PAGE NO. 6 from affected surfaces.

As can be seen in Table 3 below, most of the fungal general identified from the air samples, except for Chaetomium and Stachybotrys/Memnoniella are common and usually do not pose a health risk to healthy individuals. They may affect those who are afflicted with “hay fever”, asthma or are immune compromised. Health effects of common fungal spore genera are contained in Appendix G.

TABLE 3

ANALYSIS OF MOLD SPORES IN AIR BY DIRECT EXAM

BUILDING 1075 DEFAC, MAFB

Fungal Spore Type - Count/cubic meter (m3)

Sample

ID

Sample Location

A lt en a ri a

U lo cl a d iu m

A sc o sp o re s

A sp er g ill u s/ P en ic ill iu m

B a si d io sp o re s

C h a et o m iu

C la d o sp o ri u

Fu sa ri

M yx o m yc et es

P it h o m yc

St ch yb o tr ys /M em n o n ie lla

To ta l F u n gi

A-ST-F-01

Exterior, North 40 1,500 0 6,670 0 2,400 40 880 40 0 11,570

A-ST-F-02

Crawlspace , NE of Kitchen Hatch 0 200 0 2,400 0 200 0 200 0 0 3,000

A-ST-F-03

Crawlspace , S of Kitchen Hatch 0 200 1,700 740 100 0 0 70 0 70 2,880

A-ST-F-04

Crawlspace , W of Kitchen Hatch 0 300 4,500 100 100 300 0 100 0 20 5,420

August 4, 2023 PAGE NO. 7

Culturable Bulk Sampling

The bulk samples taken from the interior indicated that the mold level in the containment area ranged from 57,000 colony forming units (CFU), located west of the kitchen hatch, to over 1,800,000 CFUs located northeast of the kitchen hatch.

TABLE 4

ANALYSIS OF CULTURABLE BULK SAMPLES FOR MOLD

BUILDING 1075 DEFAC, MAFB

Fungal Type - CFU per gram (CFU/g)

Sample ID Sample Location Fungal Identifications (CFU/g) Total

B-C-F-01 Crawlspace, NE of

Kitchen Hatch

Aspergillus sydowii 400,000

1,800,000

Aspergillus versicolor 400,000

Cladosporium cladosporioides 300,000

Fusarium sp. 600,000

Penicillium chrysogenum 100,000

B-C-F-02 Crawlspace, S of

Kitchen Hatch

Fusarium sp. 100,000

420,000

Penicillium chrysogenum 20,000

Penicillium decumbens 100,000

Rhizopus sp. 100,000

Sterile(dark) 100,000

B-C-F-03 Crawlspace, W of Kitchen Hatch

Aspergillus sydowii 20,000 57,000

Yeast 37,000

B-C-F-04 Crawlspace, E of 1

Kitchen Hatch

Aspergillus sydowii 200,000

1,500,000 Aspergillus versicolor 300,000

Fusarium sp. 900,000

Sterile(dark) 100,000

Direct Exam Sampling (Bulk)

Common molds typically are Ascospores, Basidiomycetes, and Cladosporium. Molds indicative of moisture impacted materials include Altenaria, Chaetomium, Memnoniella, Stachybotrys. The fungal spores identified on the bulk sample collected on the black discolored TSI contained low but detectable concentrations of Stachybotrys/Memnoniella. As described above, the presence of Stachbotrys is cause for concern as this genus can produce mycotoxins that can cause negative health effects. Zygomycetes are common around decaying plant and animal matter. The sediment on the crawlspace floor could be a source of Zygomycetes.

Medium levels of Zygomycetes may be a health concern for people.

August 4, 2023 PAGE NO. 8

TABLE 5

ANALYSIS OF BULK MOLD SAMPLES BY DIRECT EXAM

BUILDING 1075 DEFAC, MAFB

Fungal Type - Density

Sample ID Sample Location

A lt en a ri a

U lo cl a d iu m

A sc o sp o re s

B a si d io sp o re s

C la d o sp o ri

M yx o m yc

St ch yb o tr ys /M em n o n ie lla

Zy go m yc

B-DE-F-01

Crawlspace, NE of Kitchen Hatch -- -- -- -- -- -- --

B-DE-F-02

Crawlspace, S of Kitchen Hatch Rare Rare -- Rare -- -- Medium

B-DE-F-03

Crawlspace, W of Kitchen Hatch -- -- -- -- -- Low --

B-DE-F-04

Crawlspace, E of Kitchen Hatch -- Rare Rare Rare Rare -- Medium

Bold Font = Signature fungi indicating wet conditions -- = Not Detected Rare = 1 to 10 mold spores/per area analyzed Low = 11 to 100 mold spores/per area analyzed Medium = 101 to 1,000 mold spores/per area analyzed

Bacteria

Air and water sample locations are presented in Figure 3 within Appendix H, and laboratory analytical reports are provided in Appendix I.

Culturable Air Sampling

The results show that the control sample from the exterior was overloaded with fungus during our inspection time. Most of the bacteria genera identified from the air samples usually do not pose a health risk to heathy individuals except Listeria monocytogenes found in the northeast of the kitchen hatch. The presence of Listeria monocytogenes is cause for concern as this species can grow and reproduce inside the host’s cell and is one of the most virulent foodborne pathogens.

August 4, 2023 PAGE NO. 9

TABLE 6

ANALYSIS OF BACTERIA IN AIR

BUILDING 1075 DEFAC, MAFB

Bacteria Type - Count/cubic meter (m3)

Sample ID Sample

Location Fungal Identifications (CFU/m3) Total

A-C-B-01 Exterior, N Sample overloaded with fungi

A-C-B-02 Crawlspace, NE of Kitchen Hatch

Bacillus firmus 24

Clavibacter michiganensis ss michiganensis 12

Listeria monocytogenes 36

Lysinibacillus fusiformis 12

Staphylococcus hominis ss novobiosepticus 12

A-C-B-03 Crawlspace, S of Kitchen Hatch

Bacillus decisifrondis 60

Bacillus simplex/butanolivorans 24

Bacillus thuringiensis/cereus 12

Bacillus weihenstephanensus/ cereus 12

A-C-B-04 Crawlspace, W of Kitchen Hatch

Bacillus atrophaeus/subtilis 36

Bacillus thuringiensis/cereus 36

Lysinibacillus sphaericus 120

Sewage Screen

Results of laboratory analysis of the water sample collected from the crawlspace indicated that the total coliform, E. Coli, and Enterococcus concentration was not found during our inspection time.

TABLE 7

ANALYSIS OF BACTERIA BY WATER

BUILDING 1075 DEFAC, MAFB

Bacteria Type - Most Probable Number (MPN)/ 100mL

Sample ID Sample Location

Total Coliform (MPN/100 mL)

E. coli (MPN/100 mL)

Enterococcus (MPN/100 mL)

W-B-01 Crawlspace <1 <1 <1

August 4, 2023 PAGE NO. 10

RECOMMENDATIONS

Based on our observations and data review, TD&H makes the following recommendations.

Chemical Monitoring

Air monitoring in accordance with confined space protocols should be used when personnel enter the crawlspace.

Asbestos

Since all the samples were analyzed as “none detected,” no further action relative to asbestos is required before the repair work may begin.

Mold & Bacteria

Based on the results of TD&H’s visual assessment and analytical data reports, a specification for cleaning and remediation should be developed to provide an environment that is safe for people performing maintenance activities in the crawlspace. The work plan should include, but not limited to, the following:

▪ Specifications for cleaning and remediation o Mobilization: Personnel & Equipment o Tasks

▪ Crawl Space

▪ Procedures/Requirements before Entering and Exiting the Work Area

▪ Bacterial Disinfection

▪ Mold Removal

▪ Active Ventilation System

▪ Clean-Up and Removal

▪ Waste Management o Health & Safety Plan o Cleanup Levels o Schedule and Work Plan Approval

LIMITATIONS

This assessment report was prepared based on information gathered during one site visit and interpretations of laboratory analytical results provided by CA Labs and EMSL.

Organisms respond to changes to environmental conditions and changes in fungal and bacteria populations and growth may occur relatively rapidly. Control of environmental conditions within the structure, particularly moisture, is therefore paramount.

This assessment report is intended for use by Malmstrom Air Force Base and its clients.

The scope of services performed by TD&H 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.

August 4, 2023 PAGE NO. 11

CLOSING

We appreciate this opportunity to provide these industrial hygiene consulting services to you and look forward to assisting you through the remainder of the project. Should you have questions or need further clarification about information contained herein, please feel free to contact us at (406) 761-3010.

Sincerely, Thuy Nguyen Industrial Hygiene Technician

TD&H ENGINEERING

Corey League CHMM, CIE Matt McGee, PE Project Manager Civil Engineer/Principal

TD&H ENGINEERING TD&H ENGINEERING

APPENDICES: A PHOTOGRAPHS

B DOCUMENTATION OF ACCREDITATION

C ASBESTOS LABORATORY REPORT

D ASBESTOS SAMPLE LOCATIONS

E MOLD SAMPLE LOCATIONS

F MOLD LABORATORY REPORTS

G FUNGAL SPORE TYPE HEALTH EFFECTS

H BACTERIA SAMPLE LOCATIONS

I BACTERIA SAMPLE RESULTS

APPENDIX A

PHOTOGRAPHS

Photo 1_Exterior(Control) Air Sample Location

Photo 3_Ground Condition NE Of Kitchen Access Hatch

Photo 2_NE Of Kitchen Access Hatch

Photo 4_South Of Kitchen Access Hatch

June 27, 2023 Inspection Photos

Photo 5_Ground Conditions South Of Kitchen Access Hatch

Photo 7_Deteriorated Pipe Insulation With Stachybotrys Mold West of Kitchen Access Hatch

Photo 6_West Of Kitchen Access Hatch

Photo 8_Ground Condition West Of Kitchen Access Hatch

Photo 9_Pooled Water Near Kitchen Access Hatch

Photo 11_Non-Asbestos Flexible Ventilation Duct

Photo 10_Pipe Insulation Debris Pile Near Kitchen Access Hatch

Photo 12_Non-Asbestos Ventilation Duct

APPENDIX B

DOCUMENTATION OF ACCREDITATION

hereby certifies that

H. Corey League has met all the specific standards and qualifications of the re-certification process, including continued professional development, and is hereby re-certified as a

CIE

Council-certified

Indoor Environmentalist

This certificate expires on September 30, 2024.

This certificate remains the property of the American Council for Accredited Certification.

American Council for Accredited Certification

Charles F. Wiles, Executive Director Certificate Number

1409017 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).

THI ANH THUY NGUYEN

T H

I A

N H

T H

U Y

N G

U Y

E N

8T H

S T

R E

E T

N O

R T

H G

R E

A T

F A

L L

S M

T

MTA-6185

Asbestos Inspector 03/15/2024

MT DEQ Asbestos Control Program

APPENDIX C

ASBESTOS LABORATORY REPORT

Attn:

Customer Project:

Reference #: Date: 7/5/2023

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 Building 1075

CBR23065032

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

Overview of Project Sample Material Containing Asbestos

Customer Project: Building 1075 CA Labs Project #: CBR23065032

No Asbestos Detected.

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

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.

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)

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

Polarized Light Asbestiform Materials Characterization

Customer Info: Attn: Customer Project:

7/5/2023

5 day 6/29/2023

Phone # 6/27/2023

Fax # 23-089-073

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% fg

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:

T1.1C-

2 Yellow Fibrous Insulation Y None Detected

100% qu, ma, ca

T1.1C T1.1C-

1 Tan Wrap with Foil N None Detected

10% fg

60% ce 30% qu, ma, ot

T1.1B-

3 Gray Plaster Y None Detected

10% fg

60% ce 30% qu, ma, ot

T1.1B-

2 Yellow Fibrous Insulation Y None Detected 100% fg

T1.1B T1.1B-

1 Tan Wrap with Foil N None Detected

30% qu, ma, ot

T1.1A-

2 Yellow Fibrous Insulation Y None Detected 100% fg

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

T1.1A T1.1A-

1 Tan Wrap with Foil N None Detected

10% fg

60% 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 Building 1075 CBR23065032

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

Polarized Light Asbestiform Materials Characterization

Customer Info: Attn: Customer Project:

7/5/2023

5 day 6/29/2023

Phone # 6/27/2023

Fax # 23-089-073

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:

100% qu, ma, ot

T11.1-

2 White Fibrous Insulation Y None Detected 100% fg

T11.1 T11.1-

1 Black Sealant Y None Detected

100% ot

T8.1-

2 Pink Fibrous Insulation Y None Detected 100% fg

Asbestos type / calibrated visual estimate percent

Non-asbestos fiber type / percent

Non-fibrous type

/ percent

T8.1 T8.1-

1 Black Covering 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 Building 1075 CBR23065032

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

APPENDIX D

ASBESTOS SAMPLE LOCATIONS

Asbestos-Containing Material

Non Asbestos-Containing Material

LEGEND

X0.0X

X0.0X

B u il d in g

D

E F

A C

M

A F

B

A s b e s to s S a m p le

L o c a ti o n s

F ig u re

T1.1C

T8.1

T1.1B

T1.1A

T11.1

Kitchen Access Hatch

Project North

APPENDIX E

MOLD SAMPLE LOCATIONS

Mold Air Sample - Cultured

LEGEND

A-C-F-0#

B u il d in g

D E

F A

C M

A F

B

M o ld S a m p le

L o c a ti o n s

F ig u re

A-C-F-02

A-ST-F-02

B-C-F-01

B-DE-F-01

A-C-F-03

A-ST-F-03

B-C-F-02

B-DE-F-02

A-C-F-04

A-ST-F-04

B-C-F-03

B-DE-F-03

Kitchen Access Hatch

A-C-F-01

A-ST-F-01

Exterior (Control) Samples

Mold Air Sample - Spore Trap

Mold Bulk Sample - Cultured

Mold Bulk Sample - Direct Exam

A-ST-F-0#

B-C-F-0#

B-DE-F-0#

B-C-F-04

B-DE-F-04

APPENDIX F

MOLD LABORATORY REPORTS

Sample Description Location

Volume

(L) Fungal Identification

Colony CountMedia

Incubation Temp (C)

Sensitivity (CFU/m³) CFU/m³

Test Report: Viable Fungi Identification and Enumeration from Impactors (Including Speciation of Penicillium, Aspergillus, Cladosporium and Stachybotrys (EMSL Method

MICRO-SOP-202)

EMSL Analytical, Inc.

5950 Fairbanks N. Houston Rd., Houston, TX 77040 Phone/Fax: (713) 686-3635 / (713) 686-3645 http://www.EMSL.com houstonlab@emsl.com

Attn: Corey League Thomas, Dean & Hoskins, Inc.

1800 River Drive North Great Falls, MT 59401

Received: 6/29/2023 10:00 AM

MAFB Building 107

Fax: (406) 727-2872 Phone: (406) 761-3010

Project:

7/14/2023Analysis Date:

6/27/2023Collected:

152303811 CustomerID: TDHI78 CustomerPO: 23-089-073 ProjectID:

EMSL Order:

A-C-F-01 152303811-0001

Exterior, N 85 MEA 25 12 Aspergillus fumigatus 5 60 Aspergillus sogae 1 12 Aspergillus terreus 1 12 Chrysosporium sp. 1 12 Penicillium brevicompactum 45 540 Sterile(dark) 1 12

54 648Total A-C-F-02

152303811-0002

Crawlspace, NE of Kitchen Hatch

85 MEA 25 12 Aspergillus sojae 1 12 Chrysosporium sp. 1 12 Fusarium sp. 1 12 Penicillium brevicompactum 1 12 Sterile(white) 1 12

5 60Total A-C-F-03

152303811-0003

Crawlspace, S of Kitchen Hatch

85 MEA 25 12 Penicillium decumbens 1 12 Sterile(dark) 1 12 Sterile(white) 2 24

4 48Total A-C-F-04

152303811-0004

Crawlspace, W of Kitchen Hatch

85 None DetectedMEA 25 12

No discernable blank was submitted with this group of samples.

THIS IS THE LAST PAGE OF THE REPORT. 1Test Report ViableFungi-7.26.0 Printed: 7/14/2023 3:40:19 PM

Analyst(s)

Terri Lawrence, Lab Manager or other approved signatory

EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted.

Positive hole correction factors have not been applied to the reported data. The detection limit is equal to 1 colony forming unit (CFU) per agar plate.

Samples analyzed by EMSL Analytical, Inc. Houston, TX AIHA LAP, LLC-EMLAP Accredited #102575

Ramadi Muntaha (4)

Initial report from 07/14/2023 15:40:19 http://www.EMSL.com mailto:houstonlab@emsl.com

OrderID: 152303811 http://www.EMSL.com / houstonlab@emsl.com

Tel/Fax: (713) 686-3635 / (713) 686-3645

5950 Fairbanks N. Houston Rd. Houston, TX 77040

EMSL Analytical, Inc. EMSL Order: 152303872

Customer ID: TDHI78

Customer PO: 23-089-073

Project ID:

Attention: (406) 761-3010Phone: Corey League

Thomas, Dean & Hoskins, Inc. (406) 727-2872Fax:

1800 River Drive North Collected Date: 06/27/2023

Great Falls, MT 59401 Received Date: 06/29/2023

Analyzed Date: 07/14/2023

Project: MAFB Building 1075

Test Report: Allergenco-D(™) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391)

Lab Sample Number:

Client Sample ID:

Volume (L):

Sample Location:

152303872-0001

A-ST-F-01

Exterior, North

152303872-0002

A-ST-F-02

Crawlspace, NE of Kitchen Hatch

152303872-0003

A-ST-F-03

Crawlspace, S of Kitchen Hatch

Spore Types Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total Raw Count Count/m³ % of Total

Alternaria (Ulocladium) 1 40 0.3 - - - - - -

Ascospores 34 1500 13 3 200 6.7 3 200 6.9

Aspergillus/Penicillium - - - - - - 23 1700 59

Basidiospores 151 6670 57.6 33 2400 80 10 740 25.7

Bipolaris++ - - - - - - - - -

Chaetomium++ - - - - - - 2 100 3.5

Cladosporium 55 2400 20.7 3 200 6.7 - - -

Curvularia - - - - - - - - -

Epicoccum - - - - - - - - -

Fusarium++ 1 40 0.3 - - - - - -

Ganoderma - - - - - - - - -

Myxomycetes++ 20 880 7.6 3 200 6.7 1 70 2.4

Pithomyces++ 1 40 0.3 - - - - - -

Rust - - - - - - - - -

Scopulariopsis/Microascus - - - - - - - - -

Stachybotrys/Memnoniella - - - - - - 1 70 2.4

Unidentifiable Spores - - - - - - - - -

Zygomycetes - - - - - - - - -

Total Fungi 263 11570 100 42 3000 100 40 2880 100

Hyphal Fragment - - - - - - - - -

Insect Fragment - - - - - - - - -

Pollen - - - - - - 1 70 -

Analyt. Sensitivity 600x - 44 - - 74 - - 74 -

Analyt. Sensitivity 300x - 13* - - 22* - - 22* -

Skin Fragments (1-4) - 1 - - 1 - - 1 -

Fibrous Particulate (1-4) - 1 - - 1 - - 1 -

Background (1-5) - 2 - - 2 - - 3 -

Terri Lawrence, Lab Manager or other Approved Signatory

++ Includes other spores with similar morphology; see EMSL's fungal glossary for each specific category.

No discernable field blank was submitted with this group of samples.

Skin Fragment and Fibrous Particulate ratings are based on the percent of non-fungal material they represent: 1 (1-25%), 2 (26-50%), 3 (51-75%), or 4 (76-100%). Background ratings are based on the total area covered by non-fungal particles: 1 (1-25%), 2 (26-50%), 3 (51-75%), 4 (76-99%), or 5 (100%; overloaded, prohibiting accurate detection and quantification). High levels of background will obscure spores and other particulates, leading to underestimation.

Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received. When the information supplied by the customer can affect the validity of the result, it will be noted on the report.

Samples analyzed by EMSL Analytical, Inc. Houston, TX AIHA LAP, LLC-EMLAP Accredited #102575

Initial report from: 07/14/2023 09:33 AM

For information on the fungi listed in this report, please visit the Resources section at www.emsl.com

Page 1 of 2Test Report - STVER3-2.24 Printed 07/14/2023 09:33 AM

5950 Fairbanks N. Houston Rd. Houston, TX 77040

EMSL Analytical, Inc. EMSL Order: 152303872

Customer ID: TDHI78

Customer PO: 23-089-073

Project ID:

Attention: (406) 761-3010Phone: Corey League

Thomas, Dean & Hoskins, Inc. (406) 727-2872Fax:

1800 River Drive North Collected Date: 06/27/2023

Great Falls, MT 59401 Received Date: 06/29/2023

Analyzed Date: 07/14/2023

Project: MAFB Building 1075

Test Report: Allergenco-D(™) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391)

Lab Sample Number:

Client Sample ID:

Volume (L):

Sample Location:

152303872-0004

A-ST-F-04

Crawlspace, W of Kitchen Hatch

152303872-9901

Dummy

Dummy

Dummy

152303872-9902

Dummy

Dummy

Dummy

Spore Types Raw Count Count/m³ % of Total - - - - - -

Alternaria (Ulocladium) - - - - - - - - -

Ascospores 4 300 5.5 - - - - - -

Aspergillus/Penicillium 61 4500 83 - - - - - -

Basidiospores 2 100 1.8 - - - - - -

Bipolaris++ - - - - - - - - -

Chaetomium++ 2 100 1.8 - - - - - -

Cladosporium 4 300 5.5 - - - - - -

Curvularia - - - - - - - - -

Epicoccum - - - - - - - - -

Fusarium++ - - - - - - - - -

Ganoderma - - - - - - - - -

Myxomycetes++ 2 100 1.8 - - - - - -

Pithomyces++ - - - - - - - - -

Rust - - - - - - - - -

Scopulariopsis/Microascus - - - - - - - - -

Stachybotrys/Memnoniella 1* 20* 0.4 - - - - - -

Unidentifiable Spores - - - - - - - - -

Zygomycetes - - - - - - - - -

Total Fungi 76 5420 100 - - - - - -

Hyphal Fragment 1 70 - - - - - - -

Insect Fragment - - - - - - - - -

Pollen - - - - - - - - -

Analyt. Sensitivity 600x - 74 - - - - - - -

Analyt. Sensitivity 300x - 22* - - - - - - -

Skin Fragments (1-4) - 1 - - - - - - -

Fibrous Particulate (1-4) - 1 - - - - - - -

Background (1-5) - 3 - - - - - - -

Terri Lawrence, Lab Manager or other Approved Signatory

++ Includes other spores with similar morphology; see EMSL's fungal glossary for each specific category.

No discernable field blank was submitted with this group of samples.

Skin Fragment and Fibrous Particulate ratings are based on the percent of non-fungal material they represent: 1 (1-25%), 2 (26-50%), 3 (51-75%), or 4 (76-100%). Background ratings are based on the total area covered by non-fungal particles: 1 (1-25%), 2 (26-50%), 3 (51-75%), 4 (76-99%), or 5 (100%; overloaded, prohibiting accurate detection and quantification). High levels of background will obscure spores and other particulates, leading to underestimation.

Present = Spores detected on overloaded samples. Results are not blank corrected unless otherwise noted. The detection limit is equal to one fungal spore, structure, pollen, fiber particle or insect fragment. "*" Denotes particles found at 300X. "-" Denotes not detected. Due to method stopping rules, raw counts in excess of 100 are extrapolated based on the percentage analyzed. EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received. When the information supplied by the customer can affect the validity of the result, it will be noted on the report.

Samples analyzed by EMSL Analytical, Inc. Houston, TX AIHA LAP, LLC-EMLAP Accredited #102575

Initial report from: 07/14/2023 09:33 AM

For information on the fungi listed in this report, please visit the Resources section at www.emsl.com

Page 2 of 2Test Report - STVER3-2.24 Printed 07/14/2023 09:33 AM

OrderID: 152303872

EMSL Analytical, Inc.

5950 Fairbanks N. Houston Rd., Houston, TX 77040 Phone/Fax: (713) 686-3635 / (713) 686-3645 http://www.EMSL.com houstonlab@emsl.com

Attn: Corey League Thomas, Dean & Hoskins, Inc.

1800 River Drive North Great Falls, MT 59401

Received: 6/29/2023 10:00 AM

MAFB Building 1075

Fax: (406) 727-2872 Phone: (406) 761-3010

Project:

7/18/2023Analysis Date:

6/27/2023Collected:

152303810 CustomerID: TDHI78 CustomerPO: 23-089-073 ProjectID:

EMSL Order:

Sample Description Dilution Fungal Identification

Colony Count

Temp (C)

CFUs

Sample Measure

( CFU/g )

Analytical Sensitivity

( CFU/g )(g )Sample Location Percent of Total

Test Report: Identification and Enumeration of Culturable Fungi by Bulk (Including Speciation of Penicillium, Aspergillus, Cladosporium, and Stachybotrys

(EMSL Method MICRO-SOP-202))

B-C-F-01

152303810-0001 MEA

25 1Crawlspace, NE of Kitchen Hatch Media:

Aspergillus sydowii 4 400,000100000100,000 22.2 Aspergillus versicolor 4 400,000100000100,000 22.2 Cladosporium cladosporioides 3 300,000100000100,000 16.7 Fusarium sp. 6 600,000100000100,000 33.3 Penicillium chrysogenum 1 100,000100000100,000 5.6 Total 18 1,800,000

B-C-F-02

152303810-0002 MEA

25 1Crawlspace, S of Kitchen Hatch Media:

Fusarium sp. 1 100,000100000100,000 23.8 Penicillium chrysogenum 2 20,0001000010,000 4.8 Penicillium decumbens 10 100,0001000010,000 23.8 Rhizopus sp. 1 100,000100000100,000 23.8 Sterile(dark) 10 100,0001000010,000 23.8 Total 24 420,000

B-C-F-03

152303810-0003 MEA

25 1Crawlspace, W of Kitchen Hatch Media:

Aspergillus sydowii 2 20,0001000010,000 35.1 Yeast 37 37,00010001000 64.9 Total 39 57,000

B-C-F-04

152303810-0004 MEA

25 1Crawlspace, E of Kitchen Hatch Media:

Aspergillus sydowii 2 200,000100000100,000 13.3 Aspergillus versicolor 3 300,000100000100,000 20.0 Fusarium sp. 9 900,000100000100,000 60.0 Sterile(dark) 1 100,000100000100,000 6.7 Total 15 1,500,000

No discernable blank was submitted with this group of samples

Terri Lawrence, Lab Manager or other approved signatory

Analyst(s)

THIS IS THE LAST PAGE OF THE REPORT. 1Test Report CultFung_7.35.9 Printed: 7/20/2023 5:02:19 PM

EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received.

Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted.

The detection limit is equal to 1 colony forming unit (CFU) per agar plate.

Samples analyzed by EMSL Analytical, Inc. Houston, TX AIHA LAP, LLC-EMLAP Accredited #102575

Ramadi Muntaha (4)

Initial report from 07/20/2023 17:02:19

OrderID: 152303810

5950 Fairbanks N. Houston Rd. Houston, TX 77040

EMSL Analytical, Inc. EMSL Order: 152303873

Customer ID: TDHI78

Customer PO: 23-089-073

Project ID:

Attention: (406) 761-3010Phone: Corey League

Thomas, Dean & Hoskins, Inc. (406) 727-2872Fax:

1800 River Drive North Collected Date: 06/27/2023

Great Falls, MT 59401 Received Date: 06/30/2023

Analyzed Date: 07/14/2023

Project: MAFB Building 1075

Test Report: Microscopic Examination of Fungal Spores, Fungal Structures, Hyphae, and Other

Particulates from Bulk Samples (EMSL Method MICRO-SOP-200)

Lab Sample Number:

Client Sample ID:

Sample Location:

152303873-0001

B-DE-F-01

152303873-0002

B-DE-F-02

152303873-0003

B-DE-F-03

152303873-0004

B-DE-F-04

152303873-9901

Dummy

Crawlspace, NE of Kitchen

Hatch

Crawlspace, S of Kitchen

Hatch

Crawlspace, W of Kitchen

Hatch

Crawlspace, E of Kitchen

Hatch Dummy

Spore Types Category Category Category Category -

Alternaria (Ulocladium) - Rare - - -

Ascospores - Rare - Rare -

Aspergillus/Penicillium - - - - -

Basidiospores - - - Rare -

Bipolaris++ - - - - -

Chaetomium++ - - - - -

Cladosporium - Rare - Rare -

Curvularia - - - - -

Epicoccum - - - - -

Fusarium++ - - - - -

Ganoderma - - - - -

Myxomycetes++ - - - Rare -

Pithomyces++ - - - - -

Rust - - - - -

Scopulariopsis/Microascus - - - - -

Stachybotrys/Memnoniella - - Low - -

Unidentifiable Spores - - - - -

Zygomycetes - *Medium* - Medium -

Hyphal Fragment - - - - -

Insect Fragment - - - - -

Pollen - - - - -

Fibrous Particulate Rare Rare Low Low -

Category: Count/per area analyzed - Rare: 1 to 10 Low: 11 to 100 Medium: 101 to 1000 High: >1000

- Denotes Not Detected.

++ Includes other spores with similar morphology; see EMSL's fungal glossary for each specific category.

* = Sample contains fruiting structures and/or hyphae associated with the spores.

Terri Lawrence, Lab Manager or other Approved Signatory

No discernable field blank was submitted with this group of samples.

EMSL maintains liability limited to cost of analysis. Interpretation and use of test results are the responsibility of the client. This report relates only to the samples reported above, and may not be reproduced, except in full, without written approval by EMSL. EMSL bears no responsibility for sample collection activities or analytical method limitations. The report reflects the samples as received. Results are generated from the field sampling data (sampling volumes and areas, locations, etc.) provided by the client on the Chain of Custody. Samples are within quality control criteria and met method specifications unless otherwise noted.

Samples analyzed by EMSL Analytical, Inc. Houston, TX AIHA LAP, LLC-EMLAP Accredited #102575, Texas Mold LAB0105

Initial report from: 07/14/2023 08:47 AM

For information on the fungi listed in this report, please visit the Resources section at www.emsl.com

Page 1 of 1Test Report DEVER1-2.9.0 Printed 07/14/2023 08:47 AM

OrderID: 152303873

APPENDIX G

FUNGAL SPORE TYPE HEALTH EFFECTS

FUNGAL SPORE HEALTH RISKS

Fungal Spore Type Health Risk (EMSL Fugal Glossary)

Alternaria

Type I (Asthma and Hay Fever)

Type III (Hypersensitivity)

Arthrinium Arthrinium sphaerospermum is recognized as an allergen

Ascospores Depends on Species

Basidiospores

Type I (Asthma and Hay Fever)

Type III (Hypersensitivity)

Aspergillus

Allergic Bronchopulmonary

Aspergillosis (ABPA)

Aspergillus Sinusitis

Invasive Aspergillsis

Penicillium

Type I (Asthma and Hay Fever)

Type III (Hypersensitivity)

Bipolaris

Allergic and Chronic

Invasive Sinusitis

Cercospora Unknown

Chaetomium Type I (Asthma and Hay Fever)

Cladosporium Type I (Asthma and Hay Fever)

Curvularia

Type I (Asthma and Hay Fever)

Allergic Fungal Sinusitis

Epicoccum Type I (Asthma and Hay Fever)

Fusarium Type I (Asthma and Hay Fever)

Ganoderma Know to Cause Allergies

Myxomycetes Type I (Asthma and Hay Fever)

Oidium Unknown

Nigrospora Type I (Asthma and Hay Fever)

Pithomyces Unknown

Scopulariopsis Type III (Hypersensitivity)

Sordaria Unknown

Spegazzinia Unknown

Stachybotrys Type I (hay fever, asthma)

Ulocladium

Type I (Asthma and Hay Fever)

Exacerbates effects of Alternaria

APPENDIX H

BACTERIA SAMPLE LOCATIONS

Bacteria Air Sample

LEGEND

A-C-B-0#

B u il d in g

D E

F A

C M

A F

B

B a c te ri a S a m p le

L o c a ti o n s

F ig u re

A-C-B-02

A-C-B-03

A-C-B-04

Kitchen Access Hatch

Bacteria Water SampleW-B-01

W-B-01

A-C-B-01 Exterior (Control)

APPENDIX I

BACTERIA SAMPLE REPORTS

Description Location

Volume

(L) Bacteria Identification

Colony CountMedia

Incubation Temp (C)

Sensitivity (CFU/m³) CFU/m³

Test Report: Identification and Enumeration of Culturable Bacteria by Air (Five Most Prominent Types (EMSL Method MICRO-SOP-132))

EMSL Analytical,…