Assessment Prepared for Prepared by

Rinzo Renthlei, EIT Project Engineer

Linda Hollingsworth, PE Department Manager

Christopher M. Hundley Principal Consultant

Report of Fungal and Indoor Air Quality (IAQ) Assessment

Douglas MacArthur Swing Space 4643 Taney Avenue

Alexandria, Virginia 22304

Prepared for

Alexandria City Public Schools (ACPS) 1340 Braddock Place, 6th Floor

Alexandria, VA 22314

Prepared by

Professional Service Industries, Inc. 2930 Eskridge Road

Fairfax, Virginia 22031

November 13, 2020

PSI Project Number 04481599

Intertek-PSI 2930 Eskridge Road Fairfax, VA 22031

Tel 703.698.9300 Fax 703.698.4414 intertek.com/building

November 13, 2020

Alexandria City Public Schools 1340 Braddock Place, 6th Floor Alexandria, VA 22314

Attn: Mr. John Finnigan Acting Director of Educational Facilities Phone: (703) 619 8297 e-mail: [email protected]

Subject: Fungal and Indoor Air Quality (IAQ) Assessment Douglas MacArthur Swing Space 4643 Taney Avenue Alexandria, Virginia 22304 PSI Project Number: 04481599

Dear Mr. Finnigan:

Professional Service Industries, Inc. (PSI) performed Mold Assessment at the above referenced property. PSI provided its services in general accordance with the requirements contained in PSI’s proposal no. 0448-324502 dated October 15, 2020.

PSI thanks you for choosing us as your consultant for this project. Please contact us at (703) 698-9300 if you have any questions or we may be of further service.

Respectfully Submitted,

PROFESSIONAL SERVICE INDUSTRIES, INC.

Linda Hollingsworth, PE Christopher M. Hundley Department Manager Principal Consultant

Rinzo Renthlei, EIT Project Engineer

mailto:[email protected]

Project Number: 04481599 Fungal & IAQ Assessment Douglas MacArthur, ACPS

November 13, 2020

www.intertek.com/building

TABLE OF CONTENTSS

1 EXECUTIVE SUMMARY ................................................................................................................ 1 2 INTRODUCTION .......................................................................................................................... 2

2.1 AUTHORIZATION .................................................................................................................... 2 2.2 SITE DESCRIPTION .................................................................................................................. 2 2.3 PROJECT BACKGROUND ......................................................................................................... 2 2.4 PURPOSE AND SCOPE ............................................................................................................ 2

3 ASSESSMENT ACTIVITIES ............................................................................................................. 3 3.1 WALK-THROUGH EVALUATION .............................................................................................. 3 3.2 INTERVIEWS ........................................................................................................................... 3 3.3 TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENTS ................................................ 3 3.4 AIRBORNE FUNGAL SPORE SAMPLING .................................................................................. 3 3.5 SURFACE FUNGI TAPE LIFT SAMPLING .................................................................................. 4 3.6 LABORATORY ......................................................................................................................... 4

4 ASSESSMENT RESULTS ................................................................................................................ 5 4.1 VISUAL ASSESSMENT ............................................................................................................. 5 4.2 TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENTS ................................................ 5 4.3 MOLD ..................................................................................................................................... 6

5 CONCLUSIONS AND RECOMMENDATIONS ................................................................................. 10 6 WARRANTY .............................................................................................................................. 11

6.1 FUNGAL ASSESSMENT .......................................................................................................... 11 6.2 USE BY THIRD PARTIES ......................................................................................................... 11 6.3 UNIDENTIFIABLE CONDITIONS ............................................................................................. 11

LIST OF APPENDICES

APPENDIX A – LABORATORY MOLD SPORE TRAP REPORT AND SAMPLE CHAIN OF CUSTODY APPENDIX B – LABORATORY SURFACE FUNGI TAPE LIFT REPORT AND SAMPLE CHAIN OF CUSTODY APPENDIX C – SAMPLE LOCATION MAP APPENDIX D – PHOTOLOG


November 13, 2020 Page 1


1 EXECUTIVE SUMMARY

Professional Service Industries, Inc. (PSI), an Intertek Company, conducted a Fungal (Mold) and Indoor Air Quality (IAQ) Assessment within Douglas MacArthur Swing Space located at 4643 Taney Avenue in Alexandria, Virginia. The assessment was conducted to provide data on IAQ conditions within the specified areas of the building as it relates to the recognition, evaluation, and control of mold and moisture, and other parameters. PSI’s Mr. Rinzova Renthlei conducted the assessment on November 3, 2020 at the above referenced property.

This assessment was conducted at the request of Alexandria City Public Schools (ACPS).

The scope of the assessment included a walk-through inspection, interviews of the site contact to obtain information relative to specific fungal and/or moisture issues, and sample collection; measurements of temperature, relative humidity in the selected areas; sampling for total airborne fungal spores utilizing a high-volume pump with an Air-O-Cell™ spore trap cassettes for the collection of bioaerosol (i.e. mold) spores and surface sampling of suspected mold growth.

Findings / Conclusions

Based on methodologies described in this report, this assessment identified evidence of conditions conducive to interior fungal amplification. A summary of the assessment findings and sampling results are listed below.

Building Walk-thru / Observations

Visible mold was noted in Classroom 1058. Stains and evidence of moisture on ceiling tiles were noted in the ceiling tiles of Classrooms 1058, 1061 and hallway outside Classroom 1061. The moisture stained ceiling tile is evidence of a water intrusion issue.

Temperature and Relative Humidity

The temperature and relative humidity indoors were within ASHRAE acceptable limits or ranges. However, it should be noted that relative humidity was moderately higher in classrooms 1058, 1059, 1060, 1061 and 1061 as compared to the rest of the indoor assessed areas.

Airborne Mold Spores

The results of the air sampling indicated the presence of significantly elevated indoor airborne concentrations of Penicillium/Aspergillus Group fungal spores in classrooms 1058, 1059, 1061 and the cafeteria.

Surface Tape Lift for Mold

The results of surface fungi tape lift sampling identified the target mold species Cladosporium and Penicillium/ Aspergillus Group at heavy concentrations in Classroom 1058.

This summary does not contain all the information presented in the full report. The report should be read in its entirety to obtain a more complete understanding of the information provided and to aid in any decisions made or actions taken based on this information.




2 INTRODUCTION

A Mold and IAQ assessment were conducted by PSI at Douglas MacArthur Swing Space located at 4643 Taney Avenue, Alexandria, Virginia. This assessment was conducted at the request of the client and was generally conducted in two phases as follows:

Phase 1 – Inspection and Data Collection - A preliminary evaluation was conducted by PSI which included a walk-through inspection, interview with the site contact providing information relative to specific fungal and/or moisture issues, and sample collection. Total airborne fungal spores were sampled utilizing a high-volume pump with an Air-O-Cell™ spore trap cassettes for the collection of bioaerosol (i.e. mold) spores. Suspect mold growth on building surfaces were tested using tape lift methodologies. Air and surface sampling methodology is presented in Section 3.

Phase 2 - Project Report - This report outlines the assessment findings based on the interviews, testing results and field observations. The report also discusses other observations concerning the workplace as they impacted the sampling events. This report includes a discussion of sampling methodology, locations, analytical methods, results, conclusions, and recommendations for remedial action.

2.1 AUTHORIZATION

Authorization to perform the assessment was provided by Mr. David F. Banks, Director of Procurement, of ACPS in the form of a signed Rider Agreement (ACPS Agreement No. 2020103) dated May 7, 2020. The work was performed in accordance with the scope and terms and conditions contained in PSI’s proposal number 0448-324502 dated October 15, 2020.

2.2 SITE DESCRIPTION

The subject property is located at 4643 Taney Avenue in Alexandria, Virginia and is an active public school. PSI understands the building consists of approximately 62,400 square feet (sf) of finished above grade one-story building.

2.3 PROJECT BACKGROUND

ACPS requested a Mold and IAQ Assessment to determine the absence or presence of potential fungal and air quality issues.

2.4 PURPOSE AND SCOPE

The purpose of this scope of services is to provide data on the conditions as it relates to the recognition, evaluation, and control of mold and IAQ within the subject property building. This assessment will provide data regarding potential fungal amplification and IAQ issues.




3 ASSESSMENT ACTIVITIES

Field investigation and sampling activities were conducted on November 3, 2020. Prior to the commencement of assessment activities, management staff of ACPS provided site information and assisted in providing access to the facility.

3.1 WALK-THROUGH EVALUATION

The walk-through evaluation included a visual assessment of all the accessible compartments Douglas MacArthur Swing Space.

3.2 INTERVIEWS

PSI conducted interviews with ACPS Director of Safety & Security Services, Mr. John Contreras for the subject property building. According to the site contact, mold and past water intrusion issues have been observed in classrooms (CR) 1058, 1059, 1060 and 1061 of the subject property.

3.3 TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENTS

Short-term, spot check measurements were made for temperature and relative humidity in select locations of the subject property. Areas were investigated using Extech® Humidity/Temperature Pen 445580.

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) provides guidance on comfort ranges for temperature depending on season. These numbers generally range from 68 to 76 degrees Fahrenheit (o F) during the winter months and from 72 to 80o F during the summer months. The ranges are dependent on available humidity with the lower end of the temperature range coinciding with the higher humidity’s.

Measurement and recording of the relative humidity are used to indicate comfort level parameters associated with the indoor air. Overly dry as well as overly humid conditions are both indicators of air quality provided by the heating, ventilation, and air conditioning (HVAC) system. High humidity levels can cause concern regarding the potential for growth of fungi within the facility. ASHRAE Standard 62.1-2013, "Ventilation for Acceptable Indoor Air Quality", requires that relative humidity levels be designed to be limited to 65% or less for mechanical systems with dehumidification capability. For other mechanical system types or where spaces are not served by mechanical systems, Standard 62.1 has no humidity limitations. The U.S. Occupational Safety and Health Administration (OSHA) recommends humidity control in the range of 20% to 60%.

3.4 AIRBORNE FUNGAL SPORE SAMPLING

Total (viable and non-viable) airborne fungal spores were sampled utilizing a high-volume pump with an Air-O-Cell™ spore trap cassette for the collection of bioaerosol (i.e. mold) spores. Air-O-Cell™ spore traps that deposit the spores onto a slide where they are identified and enumerated microscopically were used as a sampling media. The Air-O-Cell™ spore trap was connected to a sampling pump calibrated to a flow rate of 15 liters per minute (LPM) with a sample time of 5 minutes for the collection of 75 liters of air per sample. A total of twenty (20) spore trap air samples (including 18 interior functional spaces and 2 outdoor).




The advantage to using this method is quick turn-around time from the laboratory, as the samples are evaluated microscopically and do not require incubation. Please note that spores including viable and non-viable spores are counted. Fungal spores cannot be speciated using this method. 3.5 SURFACE FUNGI TAPE LIFT SAMPLING Samples were collected from surfaces within selected areas that are visually observed to have or exhibit potential signs of fungal growth for direct examination utilizing tape lift sample methodologies. Fungal analysis includes genus identification of viable and non-viable fungi present. However, utilizing this method it is not possible to differentiate between viable and non-viable fungi spore types. A total of four (4) surface tape lift samples were collected from visible water staining and mold. 3.6 LABORATORY

The microbial samples were transported under chain of custody to PSI’s Microbiological Laboratory located in 850 Poplar Street, Pittsburgh, Pennsylvania for analysis. Mold spores will be identified by microscopic observation. PSI’s laboratory is accredited by the AIHA and is accredited by EMLAP. Copies of the chain of custody forms and laboratory analytical reports are attached.




4 ASSESSMENT RESULTS

PSI has performed a conducted a Mold and IAQ Assessment of the subject site in general accordance with PSI Proposal No. 0448-324502.

4.1 VISUAL ASSESSMENT

Prior to collecting airborne samples, PSI conducted a visual assessment of site. All observed mold growth and water damages are noted in the tabulation of the visual assessment shown in Table 1 below.

Table 1: Summary of Visual Assessment Location Visible Mold Musty Odors

Classroom 1058 Observed water staining on acoustic ceiling tiles; mold growth on chairs Damp odor noted

Hallway outside Classroom 1060 Observed water staining on acoustic ceiling tile outside 1060 None noted

Classroom 1061 Observed water staining on acoustic ceiling tiles None noted

4.2 TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENTS

As stated in Section 3.3, the interior and exterior were investigated using Extech® Humidity/Temperature Pen 445580. A summary of the measurements for temperature and relative humidity in the areas that were sampled and assessed are presented below in Table 2.

Table 2: Temperature and Relative Humidity Measurements

Location Relative Humidity (%)

Temperature (°F)

Lobby 23.4% 63.3°F Auditorium 21.3% 64.4°F

Media Center 21.1% 72.3°F Hallway outside Classrooms 1012 and 1125 26.3% 66.0°F

Classroom 1060 44.4% 64.2°F Classroom 1058 45.2% 62.8°F Classroom 1059 42.5% 59.7°F Classroom 1061 44.5% 61.7°F Classroom 1066 43.2% 61.5°F

Hallway outside Classrooms 1057 and 1044 29.4% 63.5°F Office 1047 27.6% 62.7°F

Kitchen 27.9% 62.2°F Cafeteria 27.3% 62.2°F

Boiler Room 76.5% 70.6°F Classroom 1068 32.0% 62.7°F

Hallway outside Classrooms 1073 and 1072 30.7% 64.9°F




Location Relative Humidity (%)

Temperature (°F)

Health Suite 1111 28.9% 64.7°F Art Room 1027 30.7% 66.9°F

Outdoor conditions 17.1% 68.5°F

Indoor temperatures were within the ASHRAE recommendation of 68 to 76 degrees Fahrenheit (oF) for winter month. Relative humidity was also within the OSHA recommendation of 20% to 60%. For the purpose of this assessment, temperature and humidity should not be relied on due to the ongoing construction at the facility.

4.3 MOLD

Airborne Mold Sampling The interpretation of bioaerosol sample results is a challenge for the health and safety professional as there are at present no strict numerical guidelines which are appropriate for assessing whether the contamination in an area is acceptable or not. There are currently no regulatory standards for evaluating airborne fungi concentrations for this or any other facility. The standard of care in the industry involves the comparison of airborne fungal species from the indoor air environment to outdoor varieties and concentrations. The best scenario in this evaluation is to observe similar species indoors and outdoors, with the concentrations indoors being less than, or not significantly more than, the outdoor concentrations.

The ACGIH has recommended rank order assessment, as shown below, as a means of interpreting data. Because of the problems noted above, numerical guidelines cannot be used as the primary determinant of whether there is a problem.

1. Significant numbers of certain pathogenic fungi should not be present in indoor air. These includeAspergillus fumigatus, Histoplasma, and Cryptococcus. Bird or bat droppings in air intakes, ducts orrooms should be assumed to contain these pathogens. Corrective action should be taken accordingly inthe event of positive

2. The persistent presence of significant numbers of toxigenic fungi, Stachybotrys, toxigenic Aspergillus,Penicillium, and Fusarium species indicates that further investigation and remedial action should betaken accordingly

3. The confirmed presence of one or more fungal species occurring as a significant percentage of asample in indoor air samples and not similarly present in concurrent outdoor samples is evidence of afungal amplifier

4. The indoor airborne species of mold (mycoflora) and bacteria is qualitatively similar and quantitativelylower than that of outdoor air.

It is important to note in evaluating air sampling data that airborne concentrations may vary significantly based on variability in fungal growth, time of day, temperature, humidity and air movement. “Significantly elevated” conditions are present when the indoor sample concentration is observed to be at least one order of magnitude (10 times) above the average outdoor measured concentration. In evaluating airborne mold data, PSI also reviewed the total airborne mold spore concentrations, measured from indoor sample locations, to




determine if they were “significantly elevated” when compared to total airborne spore concentrations measured from outdoor locations.

A total of twenty (20) air samples were collected, eighteen (18) indoors and two (2) outdoors. The indoor airborne mold spore concentrations were between 26 spores/m3 (spores per cubic meter of air) and 39,000 spores/m3 while the outdoor level were between 3,700 spores/m3 and 4,700 spores/m3. The types of mold identified indoors were generally similar to the outdoor types, but at lower concentrations. Table 3 shows only the same types of spores found inside as compared to outside or only found inside. Laboratory results for the airborne mold spore analyses are contained in Appendix A.

Table 3: Fungal Air Sample Results

Mold Type

Sample Number/Location

AS-01 Entrance Lobby

AS-02 Auditorium

AS-03 Media Center

AS-04 Hallway outside 1012 and 1014

Cladosporium sp. 13 27 13 - Basidiospores 27 - 13 -

Smuts/ Myxomycetes 13 13 27 - Penicillium/ Aspergillus Group - - 210 27

Unknown/Brown* 13 - - - Total Spores (spores/m3) 66 40 260 27

Mold Type Sample Number/Location

AS-05 CR 1060

AS-06 CR 1058

AS-07 CR 1059

AS-08 CR 1061

Cladosporium sp. - 350 190 27 Ascospores - 13 27 13

Basidiospores - - 40 13 Smuts/ Myxomycetes - 13 27 27

Penicillium/ Aspergillus Group - 39,000 36,000 1,000 Curvularia sp. - - - 13

Unknown/Brown* 13 27 - 40 Pithomyces sp. 13 - - 13

Rusts - - - 13 Total Spores (spores/m3) 26 39,000 36,000 1,200

Mold Type


AS-09 CR 1066

AS-10 Hallway outside

1044

AS-11 Office 1047

AS-12 Kitchen

Cladosporium sp. 13 - 13 13 Ascospores 40 - - 80

Basidiospores - 13 - 13 Smuts/ Myxomycetes 13 - - 13

Penicillium/ Aspergillus Group 27 80 40 130 Unknown/Brown* - 13 - 27




Mold Type


AS-01 Entrance Lobby

AS-02 Auditorium

AS-03 Media Center

AS-04 Hallway outside 1012 and 1014

Total Spores (spores/m3) 93 110 53 280

Mold Type


AS-13 Cafeteria

AS-14 Boiler Room

AS-15 CR 1068

AS-16 Hallway between

1073 and 1072 Cladosporium sp. 40 27 - 13

Ascospores 27 190 40 - Basidiospores 13 40 - 13

Smuts/ Myxomycetes 13 13 27 13 Penicillium/ Aspergillus Group 1,000 27 - -

Curvularia sp. 13 - - - Unknown/Brown* 27 - - -

Total Spores (spores/m3) 1,100 300 67 39

Mold Type


AS-17 Health Suite 1111

AS-18 Art Room 1027

OAS-1 Outdoor Sample

#1

OAS-2 Outdoor Sample

#2 Cladosporium sp. 80 67 2,400 2,000

Ascospores 130 110 1,200 1,100 Basidiospores 40 470 210

Smuts/ Myxomycetes 13 27 210 120 Penicillium/ Aspergillus Group 27 27 80 53

Curvularia sp. - - 67 40 Unknown/Brown* 27 - 40 53

Pithomyces sp. - - 27 13 Rusts 13 - - 27

Total Spores (spores/m3) 330 230 4,700 3,700 Notes: Total spores have been rounded to two significant figures to reflect analytical precision “- “= Not Detected

* Unknown are spores without a distinctive morphology on spore traps and nonviable surface samples. The results of the air sampling indicated significant elevated indoor airborne concentrations of Penicillium/ Aspergillus Group fungal spores as compared to the outside ambient samples in classrooms 1058, 1059, 1061 and the cafeteria. Penicillium/ Aspergillus Group are commonly found in soil, decaying plant debris and in the air. Indoors, it can be commonly found in in house dust and water-damaged buildings. Surface Tape Lift Results A total of four (4) surface tape lift sample was collected from visually observed mold growth and surfaces that show water staining. Table 4 below shows the results of tape lift sampling. Laboratory results for the airborne mold spore analyses are contained in Appendix B.




Table 4: Surface Tape Lift Sample Results

Mold Type

Sample Number/Location TL-01

CR 1058 (Ceiling Tile)

TL-02 CR 1058

(Mold on chair)

TL-03 Hallway outside CR 1060 (Ceiling Tile)

TL-04 CR 1061

(Ceiling Tile) Hyphal Fragments - 4+ - - Cladosporium sp. - 4+ - -

Penicillium/ Aspergillus Group - 4+ - -

Notes: “- “= Not Detected Quantification of fungal spores are graded from 1+ through 4+ as follows: 1+ = Occasional spores seen 2+ = Few spores seen 3+ = Moderate spores seen 4+ = Numerous spores seen

The results of surface fungi tape lift sampling identified the target mold species Cladosporium and Penicillium/ Aspergillus Group at heavy concentrations.




5 CONCLUSIONS AND RECOMMENDATIONS

PSI has performed the Limited Fungal and Indoor Air Quality (IAQ) Assessment of the subject site in general accordance with PSI Proposal Number 0448-324502. Based on the methodologies and results of this monitoring, the following conclusions and recommendations have been developed.

CONCLUSIONS

Based on the methodologies described in this report, PSI has developed the following conclusions:

Building Walk-thru / Observations

Visible mold was noted in Classroom 1058. Stains and evidence of moisture on ceiling tiles were noted on the ceiling tiles of Classrooms 1058, 1061 and Hallway outside 1061. The moisture stained ceiling tile is evidence of a water intrusion issue.

Temperature and Relative Humidity

The temperature and relative humidity indoors were within ASHRAE acceptable limits or ranges. However, it should be noted that relative humidity was moderately higher in Classrooms 1058, 1059, 1060, 1061 and 1061 as compared to the rest of the indoor assessed areas.

Airborne Mold Spores

The results of the air sampling indicated the presence of significantly elevated airborne concentrations of Penicillium/Aspergillus Group fungal spores in Classrooms 1058, 1059, 1061 and the Cafeteria as compared to outside concentrations

Surface Tape Lift for Mold

The results of surface fungi tape lift sampling identified the target mold species Cladosporium and Penicillium/ Aspergillus Group at heavy concentrations on furniture in Classroom 1058

RECOMMENDATIONS

PSI recommends the following:

• Further investigation to determine the source of the water staining on the ceiling tiles of Classrooms1058, 1061 and Hallway outside 1061.

• Repair of any deficiency causing the water staining on the ceiling tiles.• Disposal of the identified water stained, and mold impacted furniture.• Cleaning and application of a mold inhibitor throughout Classrooms 1058, 1059, 1061 and the Cafeteria

followed by replacement of the water impacted ceiling tile.• Cleaning and sanitizing with a mold inhibitor of the HVAC system and duct work in Classrooms 1058,

1059, 1061 and the Cafeteria, followed by ensuring proper balance of the system.• Follow-up air testing in Classrooms 1058, 1059, 1061 and the Cafeteria upon completion of

remediation activities.




6 WARRANTY

6.1 FUNGAL ASSESSMENT

The field observations, measurements, and research reported herein are considered sufficient in detail and scope to form a reasonable basis for a Mold and IAQ Assessment of this property. The assessment, conclusions, and recommendations presented herein are based upon the subjective evaluation of limited data. They may not represent all conditions at the subject site as they reflect the information gathered from specific locations. PSI warrants that the findings and conclusions contained herein have been promulgated in accordance with generally accepted industrial hygiene methodology and only for the site described in this report.

PSI warrants that the findings contained herein have been prepared with the level of care and skill ordinarily exercised by professionals practicing in the community. The scope of work addressed readily accessible and exposed interior building areas. Observation or sampling of inaccessible areas such as behind walls or within ductwork was performed only at specific locations as described in this report. PSI’s investigation did not address determining the source of moisture intrusion into the structure.

The sampling methods utilized by PSI in performing its services may have resulted in the disturbance or dispersal of mold spores. While we attempted to minimize such dispersal, we cannot eliminate it entirely. Client acknowledges that mold is ubiquitous to the environment with mold amplification occurring when building materials are impacted by moisture. Client further acknowledges that site conditions are outside of PSI’s control, and that mold amplification will likely occur, or continue to occur, in the presence of moisture. As such, PSI cannot and shall not be held responsible for the occurrence or reoccurrence of mold amplification.

No other warranties are implied or expressed.

6.2 USE BY THIRD PARTIES

This report was prepared pursuant to the contract PSI has with ACPS. That contractual relationship included an exchange of information about the subject site that was unique and between PSI and its client and serves as the basis upon which this report was prepared. Because of the importance of the communication between PSI and its client, reliance or any use of this report by anyone other than ACPS, for whom it was prepared, is prohibited and therefore not foreseeable to PSI. Reliance or use by any such third party without explicit authorization in the report does not make said third party a third-party beneficiary to PSI’s contract with ACPS. Any such unauthorized reliance on or use of this report, including any of its information or conclusions, will be at third party’s risk. For the same reasons, no warranties or representations, expressed or implied in this report, are made to any such third party.

6.3 UNIDENTIFIABLE CONDITIONS

This report is necessarily limited to the conditions observed and to the information available at the time of the work. Due to the nature of the work, there is a possibility that there may exist conditions which could not be identified within the scope of work or which were not apparent at the time of our site work. This report is also limited to information available from the client at the time it was conducted. The report may not represent all conditions at the subject site as it only reflects the information gathered from specific locations.


APPENDIX A – LABORATORY MOLD SPORE TRAP REPORT AND SAMPLE CHAIN OF CUSTODY

Page 1 of 8

AIHA-LAP, LLC. Lab #100373 TX License: LAB0145

LAB NUMBER:Client ID:

Location:

Comments:Detection Limit(spores/m3):Hyphal Fragments 1 13 1 13 2 27

PollenSample Description:

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %Cladosporium sp. 1 13 20.00 2 27 66.67 1 13 5.00AscosporesBasidiospores 2 27 40.00 1 13 5.00Smuts/Myxomycetes 1 13 20.00 1 13 33.33 2 27 10.00Peronospora/Oidium sp.Pen./Asp. Group 16 210 80.00Alternaria sp.Drechslera/BipolarisSpegazzinia sp.Tetraploa sp.Curvularia sp.Stachybotrys sp.Unknown/Brown* 1 13 20.00Torula sp.Ulocladium sp.Chaetomium sp.Pithomyces sp.Epicoccum sp.Polythrincium sp.Pestalotia sp.Cercospora sp.RustsNigrospora sp.Ganoderma sp.

Background debris (1-5)** 3 3 3Sample Volume (liters) 75 75 75TOTAL ‡ 5 66 100 3 40 100 20 260 100

Total % may not equal 100 due to rounding.

13

Air-O-Cell

003AAS-3

Media Center

SPORE TRAP REPORT

13

Air-O-Cell

TEST METHOD: PSI-WI-620-816

001AAS-1

Entrance Lobby

002AAS-2

Auditorium

13

Air-O-Cell

Work Order: 2011086Reported: 11/6/20 Project Number: 04481599Analyzed: 11/6/20Received: 11/4/20Sampled: 11/3/20 Analyst: JM

DATE

Project Name: ACPS-IAQ

PSI, Inc.2930 Eskridge RoadFairfax, VA 22031

Attn: Rinzova Renthlei

________________________________________________________ Professional Service Industries, Inc. 850 Poplar Street, Pittsburgh, PA 15220 Phone 412-922-4000 Fax 412-922-4043 Rev.9 (TV) 030320

Page 2 of 8

AIHA-LAP, LLC. Lab #100373


Location:

Comments:Detection Limit(spores/m3):Hyphal FragmentsPollenSample Description:

Cladosporium sp.AscosporesBasidiosporesSmuts/MyxomycetesPeronospora/Oidium sp.Pen./Asp. GroupAlternaria sp.Drechslera/BipolarisSpegazzinia sp.Tetraploa sp.Curvularia sp.Stachybotrys sp.Unknown/Brown*Torula sp.Ulocladium sp.Chaetomium sp.Pithomyces sp.Epicoccum sp.Polythrincium sp.Pestalotia sp.Cercospora sp.RustsNigrospora sp.Ganoderma sp.

Background debris (1-5)**Sample Volume (liters)TOTAL ‡



TX License: LAB0145

1 13 1 13 9 120

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %26 350 0.881 13 0.03

1 13 0.03

2 27 100.00 2920 39000 98.98

1 13 50.00 2 27 0.07

1 13 50.00

3 3 375 75 752 27 100 2 26 100 2950 39,000 100


13

Air-O-Cell

006AAS-6

CR-1058

Please see last page13

Air-O-Cell

SPORE TRAP REPORT


004AAS-4

Hallway -Outside 1012, 1014

13

Air-O-Cell

005AAS-5

Classsroom (CR)-1060


DATE



Page 3 of 8



Location:






TX License: LAB0145

6 80 3 40 1 13

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %14 190 0.51 2 27 2.27 1 13 14.292 27 0.07 1 13 1.14 3 40 42.863 40 0.11 1 13 1.142 27 0.07 2 27 2.27 1 13 14.29

2736 36000 99.24 76 1000 86.36 2 27 28.57

1 13 1.14

3 40 3.41

1 13 1.14

1 13 1.14

3 3 375 75 75

2757 36,000 100 88 1,200 100 7 93 100


13

Air-O-Cell

13

Air-O-Cell

008AAS-8

CR - 1061

13

Air-O-Cell

SPORE TRAP REPORT


007AAS-7

CR -1059

009AAS-9

CR - 1066


DATE



Page 4 of 8



Location:






TX License: LAB0145

2 27 1 13 2 27

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %1 13 25.00 1 13 4.76

6 80 28.571 13 12.50 1 13 4.76

1 13 4.76

6 80 75.00 3 40 75.00 10 130 47.62

1 13 12.50 2 27 9.52

3 3 375 75 758 110 100 4 53 100 21 280 100


13

Air-O-Cell

012AAS-12

Kitchen

13

Air-O-Cell

SPORE TRAP REPORT


010AAS-10

Hallway Outside 1044

13

Air-O-Cell

011AAS-11

Ofiice 1047


DATE



Page 5 of 8



Location:






TX License: LAB0145

4 53 3 40 1 13

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %3 40 3.49 2 27 9.092 27 2.33 14 190 63.64 3 40 60.001 13 1.16 3 40 13.641 13 1.16 1 13 4.55 2 27 40.00

76 1000 88.37 2 27 9.09

1 13 1.16

2 27 2.33

3 4 375 75 7586 1,100 100 22 300 100 5 67 100


13

Air-O-Cell

13

Air-O-Cell

014AAS-14

Boiler Room

13

Air-O-Cell

SPORE TRAP REPORT


013AAS-13

Cafeteria

015AAS-15

CR 1068


DATE



Page 6 of 8



Location:






TX License: LAB0145

2 27 2 27 3 40

raw ct. spores/m3 % raw ct. spores/m3 % raw ct. spores/m3 %1 13 33.33 6 80 24.00 5 67 29.41

10 130 40.00 8 110 47.061 13 33.33 3 40 12.001 13 33.33 1 13 4.00 2 27 11.76

2 27 8.00 2 27 11.76

2 27 8.00

1 13 4.00

3 3 375 75 753 39 100 25 330 100 17 230 100


13

Air-O-Cell

018AAS-18

Art Room -1027

13

Air-O-Cell

SPORE TRAP REPORT


016AAS-16

Hallway between 1073 & 1072

13

Air-O-Cell

017AAS-17

Health Suite -1111


DATE



Page 7 of 8



Location:






TX License: LAB0145

19 250 22 2904 53 3 40

raw ct. spores/m3 % raw ct. spores/m3 %178 2400 50.57 149 2000 53.0292 1200 26.14 85 1100 30.2535 470 9.94 16 210 5.6916 210 4.55 9 120 3.20

6 80 1.70 4 53 1.421 13 0.281 13 0.28 1 13 0.36

5 67 1.42 3 40 1.07

3 40 0.85 4 53 1.421 13 0.36

2 27 0.57 1 13 0.364 53 1.14 2 27 0.71

1 13 0.362 27 0.57

2 27 0.711 13 0.286 80 1.70 3 40 1.07

4 475 75

352 4,700 100 281 3,700 100


13

Air-O-Cell

020AO-AS-2

Outdoor Sample # 2

13

Air-O-Cell

SPORE TRAP REPORT


019AOAS-1

Outdoor Sample # 1


DATE



Page 8 of 8

Specific Sample Comments:

006A: Aspergillus conidiophores present.

General Report Comments:

* Unknown/brown are spores without a distinctive morphology on spore traps and non-viable surface samples.

** Background debris is the amount of particulate matter present on the slide and is graded from 1-5 with 1 being very little, while a debris rating of 5 is unreadable. The higher the rating the more likelihood spores may be underestimated. A rating of 4 should be interpreted as minimal counts and may actually be higher than reported. ‡ Total spores/m³ has been rounded to two significant figures to reflect analytical precision.

All samples were analyzed at 400x or 600x magnification unless noted.The reporting limit is one spore/item adjusted for volume. Entire trace was analyzed unless noted.

Results relate only to items tested as received. Results are not corrected for blank data.This report may not be reproduced except in full, without written approval of PSI, Inc.Samples will be disposed of within thirty (30) days unless notified in writing by the client.Results based on volume measurement provided by the client.Disclaimer : The laboratory is not responsible for interpretation of test results or for methods used during sampling.All samples were in acceptable condition unless noted.

Respectfully submitted, PSI, Inc.

Cathy McNamee, Approved Signatory

SPORE TRAP REPORT


DATE




Professional Service Industries, Inc. 850 Poplar Street, Pittsburgh, PA 15220 Phone 412-922-4000 Fax 412-922-4043 Rev.9 (TV) 030320


APPENDIX B – LABORATORY SURFACE FUNGI TAPE LIFT REPORT AND SAMPLE CHAIN OF CUSTODY

Page 1 of 2

AIHA-LAP, LLC. Lab #100373 TX License: LAB0145


Location:

Comments:

Sample Description:

Hyphal FragmentsPollenCladosporium sp.AscosporesBasidiosporesSmuts/MyxomycetesPeronospora/Oidium sp.Pen./Asp. GroupAlternaria sp.Drechslera/BipolarisSpegazzinia sp.Tetraploa sp.Curvularia sp.Stachybotrys sp.Unknown/Brown*Torula sp.Ulocladium sp.Chaetomium sp.Pithomyces sp.Epicoccum sp.Polythrincium sp.Pestalotia sp.Cercospora sp.RustsNigrospora sp.

See final page for general and specific comments

4+

4+

003ATL-3

Hallway Outside CR-1060

No Spores DetectedSurface

Please see last pageSurface

4+

Surface

004ATL-4

CR-1061 Ceiling tile

No Spores DetectedSurface

002ATL-2

CR-1058- Chair

001ATL-1

CR-1058-Ceiling

No Spores Detected

DIRECT MICROSCOPIC EXAMINATION REPORT



DATE





Page 2 of 2

Specific Sample Comments:

001A: No fungal spores detected.002A: Aspergillus conidiophores present.003A: No fungal spores detected.004A: No fungal spores detected.

General Report Comments:

* Unknown/brown are spores without a distinctive morphology on spore traps and non-viable surface samples.

Quantification of fungal spores are graded 1+ through 4+ with:1+ = Occasional spores seen2+ = Few spores seen3+ = Moderate spores seen4+ = Numerous spores seen

All samples were analyzed at 400x or 600x magnification unless noted.

Results relate only to items tested as received.This report may not be reproduced except in full, without written approval of PSI, Inc.Samples will be disposed of within thirty (30) days unless notified in writing by the client.

Disclaimer : The laboratory is not responsible for interpretation of test results or for methods used during sampling.All samples were in acceptable condition unless noted.

Respectfully submitted, PSI, Inc.

Cathy McNamee, Approved Signatory

DIRECT MICROSCOPIC EXAMINATION REPORT


DATE




Professional Service Industries, Inc. 850 Poplar Street, Pittsburgh, PA 15220 Phone 412-922-4000 Fax 412-922-4043 Rev.9 (TV) 030320


APPENDIX C – SAMPLE LOCATION MAP

2930 Eskridge Road · Fairfax · Virginia · 22031 · 703.698.9300

Environmental Services

PROJECT NAME:

TITLE:

DRAWN BY: DATE: DRAWING NO.:

PROJECT MGR.: PROJECT NO.:

LEGEND

Fungal and Indoor Air Quality (IAQ) Assessment

Douglas MacArthur Swing Space, 4643 Taney Avenue

Alexandria, Virginia 22304

Sample Location Map

Rinzo Renthlei 11/13/2020 1

04481599Linda Hollingsworth

AS-## – Air Sample

TL-## – Tape Lift Sample

NOT TO SCALE

AS-16

#### – Designated room number

1072 1073

1068

AS-15

1047

AS-11

1057 1055

1046 1044

AS-10

1059 1061

1058 1060

AS-08

AS-07

AS-06

AS-05

AS-04

AS-01

1125 1123

1014 1012

1111

AS-17

AS-03

AS-09

1066

AS-13

AS-12

AS-14

1027AS-18

AS-02

OAS-1 and OAS-2

TL-04

TL-03

TL-01TL-02


APPENDIX D – PHOTOLOG

Fungal & IAQ Assessment Douglas MacArthur, ACPS November 13, 2020 PSI Project # 04481599

Photograph 1: Water staining observed in acoustic ceiling tile (Classroom 1058)


Photograph 2: Mold growth observed in furniture (Classroom 1058)


Photograph 3: Water staining observed in acoustic ceiling tile (Classroom 1061)

Documents

Assessment Prepared for Prepared by