1 Air Quality Report 1115315.pdf

LIMITED INDOOR AIR QUALITY

INVESTIGATION AT

UUSS FFOORREESSTT SSEERRVVIICCEE

Frenchburg Job Corps Civilian Conservation Center Culinary Arts Basement

Prepared For:

Bradley Slusher

FFrreenncchhbbuurrgg JJoobb CCoorrppss CCiivviilliiaann CCoonnsseerrvvaattiioonn CCeenntteerr 6969 Tarr Ridge Road Frenchburg, KY 40322

Testing Performed By:

Michael McGonigle, MSPH, CIEC Senior Industrial Hygienist

Reviewed by

Bruce Fergusson, CIH, PE (retired)

Air Source Technology, Inc.

131 Prosperous Place, Suite 17

Lexington, Kentucky 40509

Report Date: September 6, 2023 ASTI Project # PC515

US FOREST SERVICE Limited IAQ Study Table of Contents

Table of Contents

Section Page

EXECUTIVE SUMMARY

INTRODUCTION

SAMPLING PROTOCOLS

DISCUSSION OF RESULTS

CONCLUSIONS

REFERENCES

LABORATORY REPORT FORMS ........................................... Appendix A

PHOTOGRAPHS ...................................................................... Appendix B

LOCATION NOTES .................................................................. Appendix C

INTERIM BOX FAN FILTER ..................................................... Appendix D

US FOREST SERVICE Limited IAQ Study Introduction

ASTI Project # PC515 1

Executive Summary

Within the limits of the observations, testing conducted, and the analysis performed, the air quality at Culinary Arts Basement measured outside of normal ranges and recommended guidelines for mold. Elevated levels of Cladosporium, Penicillium/Aspergillus group and Stachybotrys mold spores were identified indoors.

There is currently no HVAC system operating in the area. All building materials measured “dry” at time of testing. No musty odors were noted at the time of inspection.

Recommendations are made to address potential air quality and health issues.

Revision Notes: This is the initial report dated September 6, 2023.

Introduction

Bradley Slusher of Frenchburg Job Corps Civilian Conservation Center contacted Air

Source Technology, Inc. (ASTI) and requested follow-up limited indoor air quality testing in the basement of the Culinary Arts Building. Michael McGonigle, of ASTI, conducted a site visit and sampling on August 23, 2023. Prior to sampling, Mr.

McGonigle spoke briefly with Mr. Slusher to discuss the history of complaints, sampling protocol, and report expectations. Mr. Slusher reported the US Forest Service desired baseline testing prior to HVAC upgrades. The Scope of Work included the following monitoring: Real-time IAQ meter tests for temperature, and relative humidity; airborne fungi (mold spore) samples; surface fungi; and building material measurements for moisture content. Digital images were also collected to document sample locations and building conditions. The air samples and field data were collected during the morning of

August 23, 2023. Sunshine was noted at the time of inspection.

A Note Regarding ASTI Diagnostic Services: In determining the causes of Indoor Air

Quality (IAQ) problems, ASTI may provide analyses of building characteristics and may present documents that describe building construction methods. These analyses may potentially provide IAQ solutions, including structural diagrams and construction techniques. These documents are no substitute for professional consultation regarding

Heating Ventilation and Air Conditioning (HVAC) or various building construction issues.

ASTI always recommends the use of a duly licensed professional engineer, contractor, or architect whenever such structural or HVAC solutions are presented. This report is

US FOREST SERVICE Limited IAQ Study Introduction

ASTI Project # PC515 2 intended to document site survey results and to provide the owner with information and options, which will enable them to make an informed decision whether professional assistance is needed or desired. A formal mold remediation specification/plan may be required by a professional remediation contractor. Also, for legal and professional reasons, the remediation contractor may require additional testing/sampling. The information and recommendations in this report supersede all other communications.

Amendments and revisions to this report will be issued if required.

US FOREST SERVICE Limited IAQ Study Sampling Protocol

ASTI Project # PC515 3

Sampling Protocols

INDOOR AIR QUALITY METER – KESTREL MODEL 5000 SERIES

The Kestrel 5000 Series Indoor Air Quality Meters measure ambient

Temperature and Relative Humidity (%RH) and several other parameters, depending on the particular model. Readings can be logged by the meter and later transferred to a PC using the RS-232 interface.

Features:

Temperature & Humidity Specifications:

Accuracy Resolution Range

Temperature 0.5°C, 0.9°F 0.1°C, 0.1°F -29C to +70°C / -20F to

+158F

Relative Humidity

2%RH @ 25°C(77°F),

10~90%RH)

0.1%RH 10% to 90%RH.

Wind Speed / Air

Flow

Larger of 3% of reading, least significant digit or 20 ft/min.

1 ft/min 118 to 7,874 ft/min

ASTI Project # PC515 4

BIOAEROSOL SAMPLES: Non-Viable Airborne Fungal Sampling:

Sampling was conducted by drawing approximately 15 liters of air per minute for five minutes through a Zefon Air-O-Cell disposable cassette that may be used for identification of molds, pollens, insect parts, skin cell fragments, fibers and inorganic particulate. The high volume vacuum pump (Buck BioAire®) was calibrated before and after sampling with a calibrated rotometer. Outdoor samples were collected before and after indoor sampling for comparison with the indoor samples.

The Air-O-Cell is a unique air sampling cassette specifically designed for the rapid collection of a wide range of airborne aerosols including mold spores, pollen, insect parts, skin cell fragments, fibers and inorganic particulate. The Air-O-Cell collects both viable and non-viable sample specimens, providing a much broader overview of potential allergens and contaminants than conventional sampling techniques.

Aerobiology Laboratory Associates, Inc., a lab accredited by the American Industrial

Hygiene Association (AIHA) in Environmental Microbiology, conducted the lab analysis.

The Aerobiology staff includes Environmental Microbiologists that are experienced in microbiology and are certified by the American Society of Clinical Pathologists (ASCP).

GENERAL INFORMATION: AIRBORNE MOLD SAMPLING IN INDOOR SETTINGS

The following is an excerpt from the California Department of Public Health’s (CDPH)

Statement on Building Dampness, Mold, and Health:

“CDPH has concluded that the presence of water damage, dampness, visible mold, or mold odor in schools, workplaces, residences, and other indoor environments is unhealthy. We recommend against measuring indoor microorganisms or using the presence of specific microorganisms to determine the level of health hazard or the need for urgent remediation. Rather, we strongly recommend addressing water damage, dampness, visible mold, and mold odor by (a) identification and correction of the source of water that may allow microbial growth or contribute to other problems, (b) the rapid drying or removal of damp materials, and (c) the cleaning or removal of mold and moldy

ASTI Project # PC515 5 materials, as rapidly and safely as possible, to protect the health and well-being of building occupants, especially children.

Similarly, the following is an excerpt from the NIOSH Alert (Publication No. 2013–102)

Preventing Occupational Respiratory Disease from Exposures Caused by Dampness in

Office Buildings, Schools, and Other Nonindustrial Buildings:

“NIOSH does not recommend routine air sampling for mold in damp building evaluations because air concentrations of molds or spores cannot be interpreted with regard to health risk and they are highly variable over time. Instead, NIOSH encourages detection by thorough visual inspections and detection via musty or moldy odors.

Per the CDC 1 “Standards for judging what is an acceptable, tolerable or normal quantity of mold have not been established…The results of samples taken in your unique situation cannot be interpreted without physical inspection of the contaminated area or without considering the building’s characteristics and the factors that led to the present condition.”

For our perspective on mold testing, consider that the conditions conducive to mold growth of species that are not considered “dangerous” by some “authorities” are also conditions that would support the growth of known pathogenic species. Consequently, observing suspect visible growth in areas with conditions that also indicate inadequate water/moisture control is sufficient reason to recommend correcting the water problem without incurring the expense of mold testing prior to action. Mold testing by an independent third party testing authority, formally known as an Indoor Environmental

Professional (IEP) in remediation guidance standards, may occur following remediation to confirm satisfactory action and to prevent the appearance of a conflict of interest.

This is the common sense approach preferred by ASTI unless legal and health circumstances warrant more rigorous methods for documentation and diagnostic purposes.

VISUAL SURVEY PROTOCOL

The onsite limited visual survey generally followed a protocol as outlined by the IICRC

S520 Standard and Reference Guide for Professional Mold Remediation, 2nd Edition.

No formal questionnaires were distributed, but informal occupant interviews were conducted. Building conditions were noted for visible signs of past or present water damage, visible filamentous fungal growth, poor housekeeping, poor ventilation, and

ASTI Project # PC515 6 inadequate filtration. Only selected areas inside the building envelope were examined.

Possible sources of water intrusion were noted. If observed, conditions that warrant action or surveillance were documented during the visual survey. Other potential irritants and sources of emission were examined to determine the need for further evaluation.

DELMHORST INSTRUMENT COMPANY MOISTURE METER MODEL BD-2100

Moisture samples were collected using the Delmhorst Instrument

Company Moisture Meter Model BD-2100. The BD-2100 is a portable handheld moisture meter designed to check moisture levels in wood, concrete, EIFS, sheetrock, and other materials. The moisture meter has three scales as follows:

Substrate Green Yellow Red

Wood Scale 6%-15% 15%-17% >17%

Gypsum Scale 0%-0.5% 0.5%-1% >1%

Masonry Scale 0-85 85-95 >95

Readings that activate the green light indicate a sufficiently dry moisture level, those that activate the yellow light indicate a borderline situation, and those that activate the red light indicate material that is too wet for painting or wallpaper. A factory-supplied field-calibration reference is used to field verify the accuracy of the instrument prior to each use.

PHOTOGRAPHS

Photographs were collected using the Nikon Coolpix S7000.

The S7000 model is a 16.0 Mega-pixel camera with a 20X optical digital zoom. It has a built-in flash and several features to enhance images in various shooting situations. The S7000 provides Nikon's latest advanced technologies including image processing so both still images and movies are rendered with fine detail and luminous clarity. Raw digital images are archived separately, with only copies of the original raw digital images processed as appropriate for clarity in the report.

US FOREST SERVICE Limited IAQ Study Results

ASTI Project # PC515 7

Discussion of Results

OBSERVATIONS

The following observations were noted during the August 23, 2023 sampling:

1. No musty odors were noted at the time of inspection.

2. Light suspect mold growth was noted on drywall above drop ceiling near the

Women’s restroom.

3. The HVAC units were missing from the mechanical room. No mechanical ventilation was running.

4. All drop ceiling tiles had been removed.

5. Two dehumidifiers were noted in the basement area but were not running.

6. All building materials tested were dry (green per Delmhorst moisture meter) at the time of inspection.

TEMPERATURE AND RELATIVE HUMIDITY SUMMARY

KESTREL IAQ METER

The American Society of Heating, Refrigeration, and Air-conditioning Engineers

(ASHRAE) has published guidelines describing thermal environmental conditions, (ASHRAE Standard 55-2004, Thermal Environmental Conditions for Human

Occupancy). These guidelines are intended to achieve thermal conditions in a given environment that at least 80% of the persons who occupy that environment will find acceptable or "comfortable." ASHRAE recommendations suggest when a building environment is occupied by sedentary or slightly active persons, and when the relative humidity is at 50%: The operating temperature to achieve thermal acceptability (comfort zone) should be 68° to 74° F in winter and 73° to 79° F in summer. If the operating temperature is outside this range, (at either end-point), then more than 20% of healthy people occupying the area are likely to experience some degree of discomfort.

ASHRAE recommendations suggest that relative humidity ranges from 20-60% present a comfort zone considered to be both comfortable and healthful. ASHRAE's recommended design conditions are an effective temperature and dry bulb temperature of 76° F (24.5° C), a relative humidity of 40 percent, and an air circulation rate of less than 45 feet per minute. Relative humidity levels below 20 percent are associated with increased discomfort and drying of the mucous membranes, which brings about

ASTI Project # PC515 8 coughing, itching, and sore throats. High humidity may possibly provide a growth medium for bacteria and fungi.

KESTREL IAQ METER

Location Temp. (F) Rel. Hum. (%)

Outdoors (9:00 am) 74.6 71.7

Office 75.0 71.7

Laundry Room 74.8 71.9

Men’s Restroom 74.6 73.7

Women’s Restroom 74.8 74.4

Mechanical Room 74.8 73.8

Electrical Room 74.6 74.9

Northeast Side of Classroom 74.7 74.9

Southwest Side of Classroom 74.5 76.0

Outdoors (10:10 am) 76.3 71.9

IAQ Guidelines 68-76 20-60

Relative humidity measured above recommended guidelines indoors at the time of inspection.

BIOAEROSOLS

There are no "official standards of guidelines" for fungal or bacterial bioaerosols or combinations of both. A general regulatory standard or recommended guideline for bioaerosols is not scientifically supportable because: a) culturable microorganisms and countable biological particles do not comprise a single entity (they are complex mixtures); b) human responses to bioaerosols range from innocuous effects to serious depending on the specific agent and the occupants susceptibility to it; c) it is not possible to collect and evaluate all bioaerosol components using a single method; and

d) at present, information relating culturable or countable bioaerosol concentrations to health effects is generally insufficient to describe exposure-response relationships.

Generally speaking however, if visible microbial growth can be seen it should be addressed and corrected.

ASTI Project # PC515 9

Airborne Fungi

Sample ID Sample Location Total Fungi (Spores/M3)

3443 Outdoors (9:00 am) 23,107

3424 Office 87,048

3432 Laundry Room 95,930

3431 Men’s Restroom 38,566

3420 Women’s Restroom 51,478

3435 Mechanical Room 101,040

7103 Electrical Room 104,836

3430 Northeast Side of Classroom 52,799

7105 Southwest Side of Classroom 91,036

3426 Outdoors (10:10 am) 18,773

Note: See Appendix A: Laboratory Analysis Results, for specific species and concentrations.

High levels of airborne fungi were identified indoors. The indoor versus outdoor comparison of species and concentrations indicates indoor amplification of

Cladosporium, Penicillium/Aspergillus group and Stachybotrys mold. These results are consistent with building conditions reported and noted at the time of inspection.

Keep in mind this test was a snapshot and represents the day of testing only. Airborne fungal levels vary due to numerous factors, including sporulation of the fungal colonies, air patterns within the building, diurnal sporulation cycles of certain fungal species, etc.

SURFACE FUNGI (MOLD)

Mold will grow in places with a lot of moisture, such as around leaks in roofs, windows, or pipes, or where there has been flooding. Mold grows well on paper products, cardboard, ceiling tiles, and wood products. Mold can also grow in dust, paints, wallpaper, insulation, drywall, carpet, fabric, and upholstery.

Exposure to damp and moldy environments may cause a variety of health effects, or none at all. Some people are sensitive to molds. For these people, exposure to molds can lead to symptoms such as stuffy nose, wheezing, and red or itchy eyes, or skin.

Some people, such as those with allergies to molds or with asthma, may have more intense reactions.

https://www.cdc.gov/asthma/faqs.htm

ASTI Project # PC515 10

TABLE 3 SURFACE FUNGI

Sample ID Sample Location Amount/Description

S-1 Drywall above ceiling tile grid

Few Aspergillus conidiophoes Numerous Cladosporium spores

Numerous insect pellets Few Penicillium conidiophores

Numerous Penicillium/Aspergillus group spores

Numerous/Hyphal elements

Growth consistent with chronic elevated humidity was found on drywall.

US FOREST SERVICE Limited IAQ Study Conclusion

ASTI Project # PC515 11

Conclusions

Within the limits of the observations, testing conducted, and the analysis performed, the air quality at Culinary Arts Basement measured outside of normal ranges and recommended guidelines for mold. Elevated levels of Cladosporium, Penicillium/Aspergillus group and Stachybotrys mold spores were identified indoors.

There is currently no HVAC system operating in the area. All building materials measured “dry” at time of testing. No musty odors were noted at the time of inspection.

In general, Air Source Technology, Inc. makes the following recommendations to improve potential air quality and address occupant concerns:

A. With the common occurrence of mold growth and the inevitable problems with building envelopes and plumbing, we highly recommend that the maintenance staff become familiar with the EPA document, Mold Remediation in Schools and

Commercial Buildings. Most problems can be handled at low cost, if managed promptly. This document provides guidance to allow most moisture and mold problems to be properly and safely handled in-house.

B. When water intrusion or water leaks are discovered, dry the affected building materials as quickly as possible to minimize potential mold growth.

C. If dealing with mold (suspect or confirmed) always use the proper Personal

Protective Equipment (PPE). According to Reference No. 3, EPA’s mold remediation guidelines, this includes at least a N95 respirator, rubber gloves, and goggles. Refer to Reference No. 3, the EPA mold remediation document, for guidance in determining if professional assistance might be warranted or desired.

D. As discovered, replace materials or clean any visible microbial contamination with a detergent, biocide and/or mild bleach solution (1 part bleach to 10 parts water), depending on the surface. Refer to Reference Numbers 3 & 4 (both are government-sponsored documents, which are available free from the Internet) for additional information regarding remediation techniques and about how to determine the need for professional assistance.

For this building, Air Source Technology, Inc. makes the following recommendations to address potential indoor air quality concerns:

E. Clean/sanitize drywall. Apply a mold preventive coating such as Kilz® Premium

Water Based Primer or Fosters® 40-20 or 25. Only Foster 40-50, Foster 40-25, Foster 40-XX products, or Kilz Water-based Premium are recommended.

US FOREST SERVICE Limited IAQ Study Conclusion

ASTI Project # PC515 12

Various surface cleaning products may be satisfactory as surface cleaners only, since the surfaces need to be cleaned sufficiently to allow proper adhesion of the anti-microbial coating.

F. As an interim measure to improve air quality and reduce airborne mold contamination, operate the box fan filter arrangement in Appendix D in the basement. Place the fan or fans in the room, directed away from occupants, to reduce mold spore-sized particulates in the room. This is no substitute for corrective action, but is an additional step to clean the air and improve the indoor environment.

G. Install new HVAC units and control humidity in the basement.

US FOREST SERVICE Limited IAQ Study References

ASTI Project # PC515 13

REFERENCES

1. Guidance for Clinicians on the Recognition and Management of Health Effects

Related to Mold Exposure and Moisture Indoors, 2004, University of Connecticut

Health Center with EPA sponsorship and input,

2. Standard and Reference Guide for Professional Water Damage Restoration (IICRC

S500), 3rd Edition, 2006, Institute of Inspection, Cleaning and Restoration

Certification (IICRC)

3. Mold Remediation in Schools and Commercial Buildings, (EPA Document 402-K-01-

001, September 2008 edition). Environmental Protection Agency (EPA)

4. Guidelines on Assessment and Remediation of Fungi in Indoor Environments, November 2008, New York City Department of Health (NYCDOH)

5. Centers for Disease Control & Prevention (CDC) web site

6. Assessment, Cleaning, and Restoration of HVAC Systems – ACR 2006, National Air

Duct Cleaners Association

7. Assessment, Remediation, and Post-Remediation Verification of Mold in Buildings –

AHIA Guideline 3-2004, 2004, American Industrial Hygiene Association (AIHA).

8. Recognition, Evaluation, and Control of Indoor Mold – AHIA Guideline 2008, 2008, American Industrial Hygiene Association (AIHA)

9. Standard and Reference Guide for Professional Mold Remediation (IICRC S520), 2nd Edition, 2008, Institute of Inspection, Cleaning and Restoration Certification

(IICRC).

10. Mahooti-Brooks, N., Storey, E., Yang, C., Simcox, N., Turner, W., Hodgson, M.

“Characterization of Mold and Moisture Indicators in the Home” Journal of

Occupational and Environmental Hygiene, 1: 826-839. December 2004.

11. Bioaerosols, Assessment and Control, 1999, American Conference of Governmental

Industrial Hygiene (ACGIH).

12. Moisture Control Handbook – Principles and Practices for Residential and Small

Commercial Buildings, 1994, John Wiley & Sons, Inc.; Moisture Control Handbook

Errata, Issued by Joseph Lstiburek, June 22, 2002

13. Yang, Chin S., Ellringer, Paul J. “Antifungal treatments and Their Effect on Fibrous

Glass Liner,” ASHRAE Journal, April 2004. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.

14. "Prevention and Remediation of Damp Indoor Environments," (Chapter 6, pages

270-310) of the 2004 Institute of Medicine (IOM) report Damp Indoor Spaces and

Health.

US FOREST SERVICE Limited IAQ Study References

ASTI Project # PC515 14

15. “Ability of Bleach and Other Biocide Treatments to Remove and Prevent Mold

Growth on Douglas-fir Lumber”, Forest Products Journal Volume 54 No. 4: 45-49

(2004)

16. Post-Remediation Verification and Clearance testing for Mold and Bacteria – Risk-

Based Levels of Cleanliness Standards, 3rd Edition, 2010, OEHCS, Inc, Publications

Division

17. Building Science for Building Enclosures, 2005. Building Sciences Press. Straube, J.F., Burnett, E.F.P.

18. Builder’s Guide to Mixed-Humid Climates, 2005, Energy & Environmental Building

Association, Joseph Lstiburek, Ph.D., PE

19. Krause, M., et. al., “Controlled Study of Mold Growth and Cleaning Procedure on

Treated and Untreated Wet Gypsum Wallboard in an Indoor Environment”’ Journal of Occupational and Environmental hygiene, 2006, Volume 3: 445-441.

20. Healthy and Affordable Housing: Practical Recommendations for Building, Renovating and Maintaining Housing, 2005, U.S. Dept. of Housing and Urban

Development and the Building America Program at the U.S. Dept. of Energy.

21. Fergusson, B.N., A Systematic Examination of the Building Envelope, 2011, Presented at the 2011 Indoor Air Quality Association, San Antonio, Indoor Air

Quality Association

22. Adkins, C. K., Fergusson, B.N., Alternative Approaches to Post Remediation

Verification, 2012, Presented at the 2012 Indoor Air Quality Association, Las Vegas, Indoor Air Quality Association

23. Fergusson, B.N., Moisture Migration Within and Through the Building Envelope, 2012, Presented at the 2012 Indoor Air Quality Association, Las Vegas, Indoor Air

Quality Association

24. Statement on Building Dampness, Mold, and Health, September 2011, California

Department of Public Health

25. Fergusson, B.N., Airborne Mold Sampling: Practical Applications, 2014, Proceedings of the 17th Annual Meeting and Indoor Air Expo, Nashville, Tennessee, Indoor Air

Quality Association

26. NIOSH Alert (Publication No. 2013–102) Preventing Occupational Respiratory

Disease from Exposures Caused by Dampness in Office Buildings, Schools, and

Other Nonindustrial Buildings, November 2012

US FOREST SERVICE IAQ Laboratory Results

Appendix A

Laboratory Analysis Results

1054 Spore Trap Analysis: SOP 3.8 Routine Client Sample # 3424 3443 Sample Location Office Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐002 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria 1 13 <1 1/3 3 40 <1 ‐ ascospores ‐ ‐ ‐ ‐ 9 960 4 ‐ basidiospores 9 120 <1 1/160 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Cladosporium 19 253 <1 1/8 19 2,027 9 ‐ Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 1 13 <1 1/4 4 53 <1 ‐ Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐

Penicillium/Aspergillus group 203 86,475 99 >100/1 16 213 <1 ‐ Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐

Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐ Rusts 2 27 <1 2/1 1 13 <1 ‐

Smuts,Periconia,Myxomycetes 1 13 <1 1/12 12 160 <1 ‐ Stachybotrys 10 133 <1 ‐ ‐ ‐ ‐ ‐

Unknown ‐ ‐ ‐ ‐ 1 13 <1 ‐ Debris Rating 2 Debris Rating 3

Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Total *See Footnotes 246 87,048 ~100% 4/1 187 23,107 ~100% ‐

Certificate of Analysis

AIHA LAP EMLAP# 102977

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Project ID: 23035684

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 1 of 10

Client Sample # 3432 3443 Sample Location Laundry Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐003 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores 3 40 <1 1/24 9 960 4 ‐ basidiospores 8 107 <1 1/180 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 26 347 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 10 133 <1 1/15 19 2,027 9 ‐

Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 41 547 <1 10/1 4 53 <1 ‐

Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐ Penicillium/Aspergillus group 220 93,717 98 >100/1 16 213 <1 ‐

Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐ Polythrincium 2 27 <1 1/11 21 280 1 ‐

Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐ Smuts,Periconia,Myxomycetes 5 67 <1 1/2 12 160 <1 ‐

Stachybotrys 71 947 <1 ‐ ‐ ‐ ‐ ‐ Unknown ‐ ‐ ‐ ‐ 1 13 <1 ‐

Debris Rating 2 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Total *See Footnotes 386 95,930 ~100% 4/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 2 of 10

Client Sample # 3431 3443 Sample Location Mens RR Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐004 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores ‐ ‐ ‐ ‐ 9 960 4 ‐ basidiospores 10 133 <1 1/144 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 10 133 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 12 160 <1 1/13 19 2,027 9 ‐

Epicoccum 1 13 <1 1/2 2 27 <1 ‐ hyphal elements 8 107 <1 2/1 4 53 <1 ‐

Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐ Penicillium/Aspergillus group 89 37,913 98 >100/1 16 213 <1 ‐

Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐ Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐

Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐ Smuts,Periconia,Myxomycetes 1 13 <1 1/12 12 160 <1 ‐

Stachybotrys 7 93 <1 ‐ ‐ ‐ ‐ ‐ Unknown ‐ ‐ ‐ ‐ 1 13 <1 ‐

Debris Rating 2 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Total *See Footnotes 138 38,566 ~100% 2/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 3 of 10

Client Sample # 3420 3443 Sample Location Womens RR Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐005 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores ‐ ‐ ‐ ‐ 9 960 4 ‐ basidiospores 6 80 <1 1/240 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 1 13 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 10 133 <1 1/15 19 2,027 9 ‐

Curvularia 1 13 <1 ‐ ‐ ‐ ‐ ‐ Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 2 27 <1 1/2 4 53 <1 ‐ Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐

Penicillium/Aspergillus group 120 51,118 99 >100/1 16 213 <1 ‐ Pithomyces 1 13 <1 1/3 3 40 <1 ‐

Polythrincium 2 27 <1 1/11 21 280 1 ‐ Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐

Smuts,Periconia,Myxomycetes ‐ ‐ ‐ ‐ 12 160 <1 ‐ Stachybotrys 4 53 <1 ‐ ‐ ‐ ‐ ‐

Unknown ‐ ‐ ‐ ‐ 1 13 <1 ‐ Debris Rating 2 Debris Rating 3

Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Total *See Footnotes 147 51,478 ~100% 2/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 4 of 10

Client Sample # 3435 3443 Sample Location Mechanical Room Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐006 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores 3 40 <1 1/24 9 960 4 ‐ basidiospores 6 80 <1 1/240 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 10 133 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 12 160 <1 1/13 19 2,027 9 ‐

Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 6 80 <1 2/1 4 53 <1 ‐

Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐ Penicillium/Aspergillus group 125 99,800 99 >100/1 16 213 <1 ‐

Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐ Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐

Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐ Smuts,Periconia,Myxomycetes 5 67 <1 1/2 12 160 <1 ‐

Stachybotrys 45 600 <1 ‐ ‐ ‐ ‐ ‐ Unknown 6 80 <1 6/1 1 13 <1 ‐

Debris Rating 4 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Spore count may be underestimated due to heavy particulate.

Total *See Footnotes 218 101,040 ~100% 4/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 5 of 10

Client Sample # 7103 3443 Sample Location Electrical Room Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐007 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores 5 67 <1 1/14 9 960 4 ‐ basidiospores 21 280 <1 1/69 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 7 93 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 49 653 <1 1/3 19 2,027 9 ‐ Clear brown 4 53 <1 ‐ ‐ ‐ ‐ ‐ Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 28 373 <1 7/1 4 53 <1 ‐ Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐

Penicillium/Aspergillus group 128 102,196 97 >100/1 16 213 <1 ‐ Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐

Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐ Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐

Smuts,Periconia,Myxomycetes 15 200 <1 1/1 12 160 <1 ‐ Stachybotrys 63 840 <1 ‐ ‐ ‐ ‐ ‐

Unknown 6 80 <1 6/1 1 13 <1 ‐ Debris Rating 4 Debris Rating 3

Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Spore count may be underestimated due to

Total *See Footnotes 326 104,836 ~100% 5/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 6 of 10

Client Sample # 3430 3443 Sample Location Northeast Classroom Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐008 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores 6 80 <1 1/12 9 960 4 ‐ basidiospores 28 373 <1 1/51 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 27 360 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 25 333 <1 1/6 19 2,027 9 ‐

Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 6 80 <1 2/1 4 53 <1 ‐

Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐ Penicillium/Aspergillus group 119 50,692 96 >100/1 16 213 <1 ‐

Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐ Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐

Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐ Smuts,Periconia,Myxomycetes ‐ ‐ ‐ ‐ 12 160 <1 ‐

Stachybotrys 62 827 2 ‐ ‐ ‐ ‐ ‐ Unknown 4 53 <1 4/1 1 13 <1 ‐

Debris Rating 4 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Spore count may be underestimated due to

Total *See Footnotes 277 52,799 ~100% 2/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 7 of 10

Client Sample # 7105 3443 Sample Location Southwest Classroom Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐009 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria ‐ ‐ ‐ ‐ 3 40 <1 ‐ ascospores 6 80 <1 1/12 9 960 4 ‐ basidiospores 36 480 <1 1/40 90 19,200 83 ‐ Cercospora ‐ ‐ ‐ ‐ 4 53 <1 ‐

Chaetomium 17 227 <1 ‐ ‐ ‐ ‐ ‐ Cladosporium 40 533 <1 1/4 19 2,027 9 ‐

Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 19 253 <1 5/1 4 53 <1 ‐

Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐ Penicillium/Aspergillus group 111 88,623 97 >100/1 16 213 <1 ‐

Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐ Polythrincium ‐ ‐ ‐ ‐ 21 280 1 ‐

Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐ Smuts,Periconia,Myxomycetes 6 80 <1 1/2 12 160 <1 ‐

Stachybotrys 52 693 <1 ‐ ‐ ‐ ‐ ‐ Unknown 5 67 <1 5/1 1 13 <1 ‐

Debris Rating 4 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Spore count may be underestimated due to

Total *See Footnotes 292 91,036 ~100% 4/1 187 23,107 ~100% ‐

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 8 of 10

Client Sample # 3426 3443 Sample Location Outdoors ﴾10:10 am﴿ Outdoors ﴾9:00 am﴿

Sample Volume ﴾L﴿ 75 75 Lab Sample # 23035684‐010 23035684‐001

Spore Identification RawCt spr/m3 %Ttl I/O RawCt spr/m3 %Ttl I/O Alternaria 2 27 <1 1/2 3 40 <1 ‐ ascospores 9 960 5 1/1 9 960 4 ‐ basidiospores 80 17,067 91 1/1 90 19,200 83 ‐ Cercospora 1 13 <1 1/4 4 53 <1 ‐

Cladosporium 30 400 2 1/5 19 2,027 9 ‐ Epicoccum ‐ ‐ ‐ ‐ 2 27 <1 ‐ hyphal elements 2 27 <1 1/2 4 53 <1 ‐ Oidium ‐ ‐ ‐ ‐ 2 27 <1 ‐

Penicillium/Aspergillus group 14 187 <1 1/1 16 213 <1 ‐ Pithomyces ‐ ‐ ‐ ‐ 3 40 <1 ‐

Polythrincium 2 27 <1 1/11 21 280 1 ‐ Rusts ‐ ‐ ‐ ‐ 1 13 <1 ‐

Smuts,Periconia,Myxomycetes 2 27 <1 1/6 12 160 <1 ‐ Unknown 3 40 <1 3/1 1 13 <1 ‐

Debris Rating 3 Debris Rating 3 Analytical Sensitivity Analytical Sensitivity: 13 spr/m3 Analytical Sensitivity: 13 spr/m3

Comments Total *See Footnotes 145 18,773 ~100% 1/1 187 23,107 ~100% ‐

Client Sample #: S‐1 Lab Sample #: 23035684‐011 Sample Location: Drywall Above Drop Ceiling Tile ﴾Tapelift Sample﴿

Test: 1051 Surface, Tape ‐ Qualitative Direct Microscopic Exam SOP 3.7

Results: Observation Few Aspergillus conidiophores seen 5 per cover slip Numerous Cladosporium spores seen 3‐4 per field ﴾minimum﴿ Numerous Insect pellets seen 3‐4 per field ﴾minimum﴿ Few Penicillium conidiophores seen 5 per cover slip Numerous Penicillium/Aspergillus group spores seen 3‐4 per field ﴾minimum﴿ Numerous hyphal elements seen 3‐4 per field ﴾minimum﴿

Debris Rating: 2

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 9 of 10

Footnotes and Additional Report Information

Debris Rating Table

1 Minimal (<5%) particulate present Reported values are minimally affected by particulate load.

2 5% to 25% of the trace occluded with particulate Negative bias is expected. The degree of bias increases directly with the percent of the trace that is occluded.

3 26% to 75% of the trace occluded with particulate Negative bias is expected. The degree of bias increases directly with the percent of the trace that is occluded.

4 75% to 90% of the trace occluded with particulate Negative bias is expected. The degree of bias increases directly with the percent of the trace that is occluded.

5 Greater than 90% of the trace occluded with particulate Quantification not possible due to large negative bias. A new sample should be collected at a shorter time interval or other measures taken to reduce particulate load.

Aerobiology Laboratory Associates, Inc. shall be responsible for all the information provided in the report, except when information is provided by the customer. Data provided by a customer can affect the validity of results and shall be clearly identified. Results apply to the samples as received. Aerobiology Laboratory Associates, Inc. is not responsible for the sampling activity, such as air and water volume, area, and mass unit. The report shall not be reproduced except in full without the approval of the laboratory to ensure that parts of a report are not taken out of context. Data interpretation of this report will be the client responsibility based on their sampling.

1. Penicillium/Aspergillus group spores are characterized by their small size, round to ovoid shape, being unicellular, and usually colorless to lightly pigmented.

There are numerous genera of fungi whose spore morphology is similar to that of the Penicillium/Aspergillus type. Two common examples would be Paecilomyces and Acremonium. Although the majority of spores placed in this group are Penicillium, Aspergillus, or a combination of both. Keep in mind that these are not the only two possibilities.

2. Ascospores are sexually produced fungal spores formed within an ascus. An ascus is a sac-like structure designed to discharge the ascospores into the environment, e.g. Ascobolus.

3. Basidiospores are typically blown indoors from outdoors and rarely have an indoor source. However, in certain situations a high basidiospore count indoors may be indicative of a wood decay problem or wet soil.

4. The colorless group contains colorless spores which were unidentifiable to a specific genus. Examples of this group include Acremonium, Aphanocladium, Beauveria, Chrysosporium, Engyodontium microconidia, yeast, some arthrospores, as well as many others.

5. Hyphae are the vegetative mode of fungi. Hyphal elements are fragments of individual Hyphae. They can break apart and become airborne much like spores and are potentially allergenic. A mass of hyphal elements is termed the mycelium. Hyphae in high concentration may be indicative of colonization.

6. Dash (-) in this report, under raw count column means 'not detected (ND)'; otherwise 'not applicable' (NA).

*7. The positive-hole correction factor is a statistical tool which calculates a probable count from the raw count, taking into consideration that multiple particles can impact on the same hole; for this reason the sum of the calculated counts may be less than the positive hole corrected total.

8. Due to rounding totals may not equal 100%.

9. Analytical Sensitivity for each spores is different for Non-viable sample when the spores are read at different percentage. Analytical Sensitivity is calculated as spr/m divided by raw count. spr/m = raw counts x (100/ % read) x (1000/Sample volume). If Analytical Sensitivity is 13 spr/m at 100% read, Analytical Sensitivity at 50% read would be 27 spr/m , which is 2 times higher. Analytical Sensitivity provided on the report is based on an assumed 100% of the trace being analyzed.

*10. Minimum Reporting Limits (MRL) for BULKS, DUSTS, SWABS, and WATER samples are a calculation based on the sample size and the dilution plate on which the organism was counted. Results are a compilation of counts taken from multiple dilutions and multiple medias. This means that every genus of fungi or bacteria recovered can be counted on the plate on which it is best represented.

*11. If the final quantitative result is corrected for contamination based on the blank, the blank correction is stated in the sample comments section of the report.

12. The results in this report are related to this project and these samples only as received.

13. For samples with an air volume of < 100L, the number of significant figures in the result should be considered (2) two. For samples with air volumes between 100-999L, the number of significant figures in the result should considered (3) three. For example, a sample with a result of 55,443 spr/m from a 75L sample using significant figures should be considered 55,000. The same result of 55,443 from a 150L sample using significant figures should be considered 55,400 spr/m

14. If the In/Out ratio is greater than 100 times it is indicated >100/1, rather than showing the real value.

Terminology Used in Direct Exam Reporting Conidiophores are a type of modified hyphae from which spores are born. When seen on a surface sample in moderate to numerous concentrations they may be indicative of fungal growth.

*: Applicable to the reported data for culture testing

Suzanne Blevins Laboratory Director

© 2023 Aerobiology Laboratory Associates, Inc. All rights reserved.

3 3 3

43760 Trade Center Place Suite 100

Sterling, VA 20166 8776489150

Air Source Technology, Inc.

131 Prosperous Place Suite 17 Lexington KY, 40509 Attn: Michael McGonigle Project: PO# 110572 ASTI Project PC515 US Forest Service IAQ

Date Collected: 8/23/2023 Date Received: 8/25/2023 Date Analyzed: 8/29/2023 Date Reported: 8/30/2023

Condition of Sample﴾s﴿ Upon Receipt: Acceptable Page 10 of 10

US FOREST SERVICE Limited IAQ Study Photographs

Appendix B

Photographs

Photograph #1: Outside air sample location.

Photograph #2: Air sample location in the Office.

Photograph #3: Air sample location in the Laundry Room.

Photograph #4: Air sample location in the Men’s Restroom.

Photograph #5: Air sample location in the Women’s Restroom.

Photograph #6: Tape-lift sample collected from drywall above drop ceiling near Women’s Restroom.

Photograph #7: Air sample location in the Mechanical Room.

Photograph #8: Air sample location in the Electrical Room.

Photograph #9: Air sample location in the Northeast side of Classroom.

Photograph #10: Air sample location in the Southwest side of Classroom.

Photograph #11: Drop ceiling tile was removed.

Photograph #12: New HVAC units.

US FOREST SERVICE Limited IAQ Study Location Notes

Appendix C

Location Notes

Culinary Arts Building Basement

Classroom 3430

Office Elect Rm Mech Rm Women’s RR Men’s RR Laundry

3424 3432 3431 3420 3435 7103

North

Culinary Arts Building

US FOREST SERVICE Limited IAQ Study Box Fan Filter

Appendix D

Box Fan Filter

Indoor Air Quality

P.O. Box 55410 131 Prosperous Place, Suite 17 PHONE: 859-299-0046 Lexington, Kentucky 40555-5410 Lexington, Kentucky 40509 FAX: 859-299-0494

Environmental Health & Safety Indoor Air Quality Industrial Hygiene Safety Consulting Training Classes

Particle Levels - Box Filter (MERV 11)

0.1

10000

100000

0.

0.

1.

2.

3.

4.

5.

6.

7.

8.

9.

.1

.0

.9

.9

.8

.7

.6

.5

.4

.4

.3

.2

.1

.0

.9

.9

.8

.7

.6

.5

.4

.4

.3

.2

.1

Hours

Pa rt ic le

C ou nt (L og S ca le

0.5 µm 1 µm 3 µm 5 µm 10 µm

Note: Particle Count Data - Values less than one were adjusted to allow log scale presentation. All values less than “1” were recorded as zero counts by the instrument.

Particulate Levels - Box Fan Filter (MERV 11)

0.1

10000

100000

0.0 0.2 0.4 0.6 0.8 0.9 1.1 1.3 1.5 1.7 1.9 2.0 2.2 2.4 2.6 2.8 3.0 3.1 3.3 3.5 Hours

Pa rti cl e

C ou nt (L og S ca le

0.5 µm 1 µm 3 µm 5 µm 10 µm

Note: Particle Count Data - Values less than one were adjusted to allow log scale presentation. All values less than “1” were recorded as zero counts by the instrument.

Box Fan Filter Stopped

Box Fan Filter Started

Box Fan Filter Restarted

Indoor Air Quality

P.O. Box 55410 131 Prosperous Place, Suite 17 PHONE: 859-299-0046 Lexington, Kentucky 40555-5410 Lexington, Kentucky 40509 FAX: 859-299-0494

Environmental Health & Safety Indoor Air Quality Industrial Hygiene Safety Consulting Training Classes

Photo 1: Inexpensive Box Fan Filter with MERV 11 Filter taped to backside Note 1.

Photo 2: Box Fan Filter with MERV 11 Filter in position during measurements

Note 1: This picture was taken during earlier measurements. The isokinetic probe was fitted on the LASAIR II as shown in Photo 2 for this informal data.

An informal experiment was conducted to measure the filtration effectiveness of a simple, inexpensive box fan, fitted with a MERV 13 (preferred) or MERV 11 electrostatic 1” filter. The box fan filter was situated in an 11’ X 19.5’ X 8.5’ (approximately 1800 ft3) room with no activity to measure the length of time and degree that particle levels were lowered from initial levels.

A LASAIR II Model 310B Particle calibrated and certified for measuring cleanrooms was used for measurements.

The data indicated that particle levels in the room were significantly lowered after 2 to 3 hours.

Important Note: We must give credit for getting this idea from the American Allergy Supply website, http://www.americanallergysupply.com/pleated-air-filters.htm in 2007. We could not resist taking the liberty to test indoors in an informal setting with a high-volume particle counter.

Other sources for ideas and different configurations for the box fan filter:

https://cleanaircrew.org/box-fan-filters/ https://encycla.com/Corsi-Rosenthal_Cube