INDOOR AIR QUALITY INVESTIGATION FINAL REPORT. For: Washtenaw Intermediate School District 1819 South Wagner Road Ann Arbor, MI 48106

Transcription

1 INDOOR AIR QUALITY INVESTIGATION FINAL REPORT For: Washtenaw Intermediate School District 1819 South Wagner Road Ann Arbor, MI At: High Point School 1735 South Wagner Road Ann Arbor, Michigan By:.. Ann Arbor, Michigan Project #: CI0333/HP105-HP106 February & March 2018

2 INTRODUCTION/BACKGROUND Ms. Diane Sevigny of Washtenaw Intermediate School District contacted. with a request to conduct an Indoor Air Quality (IAQ) investigation at High Point School, located at 1735 South Wagner Road, Ann Arbor, Michigan. Ms. Sevigny indicated that there were complaints of various symptoms in classrooms at High Point School. These symptoms included headache, fatigue, nausea, eye and nose irritation and dizziness. Based on the information provided by Ms. Sevigny, it was decided that the Indoor Air Quality (IAQ) Investigation would include an on-site evaluation, TO-15 sampling (including VOCs, Methane, Ammonia and Sulfur compounds), Lead air, Mercury air, Respirable Dust and general parameter measurements in the building. METHODS. conducted limited indoor air quality-monitoring activities at High Point School. The investigation included the following: A visual inspection for any obvious indoor pollution sources in areas of specific concern; General Parameter measurements including; temperature, humidity, carbon dioxide, carbon monoxide, hydrogen sulfide, percent oxygen, hydrocarbons, chlorine, and nitrogen dioxide. TO-15 sampling for VOCs, Methane, Ammonia and Sulfur Compounds within Rooms A1, A5 and C8. Respirable dust air sampling in affected locations within the building. Mold air sampling in applicable spaces; Mercury sampling in applicable spaces; Lead sampling in applicable spaces; INVESTIGATION SUMMARY This section is intended to provide a general summary of the results of this IAQ Investigation. The results of the air sampling did not provide an indication of a source for the symptoms recorded within the sampling areas. All general parameter measurements were within regulatory guidelines. The TO-15 sampling did not identify any sulfur compounds or ammonia, but did identify trace VOC concentrations. All VOC concentrations were well below any regulatory limits. Additionally, the mold sampling did not demonstrate unusual elevations and the results of mercury, lead and respirable dust sampling were all below the limits of detection of the analytical methods used (very low). The air sample results do not indicate a health hazard for these parameters within the sampling locations.

3 AIR MONITORING RESULTS Temperature and Relative Humidity Thermal parameters of an environment, although basic in nature, should not be overlooked, as certain temperature/humidity level combinations can affect human comfort. Temperature and relative humidity in certain combinations can create hot and moist environments conducive to fungus/mold growth, or cold and dry environments that increase human discomfort. The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) has developed a comfort range for temperature and relative humidity at different times of the year (ASHRAE, 1989). ASHRAE has developed a chart outlining this comfort range.. conducted temperature and relative humidity measurements in order to gather the following information during the visit: 1. Information which may be used to evaluate the general performance of the HVAC system. 2. Identify possible temperature and humidity conditions and/or combinations that may promote the growth of mold and fungi or contribute to human discomfort. The measured relative humidity levels and the measured temperatures on the day of the investigation are unlikely to be conducive to mold/mildew growth or represent a potential health concern at this time. Carbon Dioxide Carbon dioxide (CO 2) is an important parameter in assessing indoor air quality, as above-normal concentrations can provide an indication of inadequate ventilation. Since CO 2 is expired by humans during respiration, the level of CO 2 indoors as compared to outdoors may be used in determining the amount of fresh outside air that is included in the total ventilation process, as well as a general indication as to the efficiency of the HVAC system. In addition, ASHRAE recommends a level of 1,000 parts per million (ppm) as a guideline for human comfort (ASHRAE, 1989). Areas with CO 2 levels above 1,000 ppm can be considered to possibly have inadequate ventilation and can detract from occupant comfort. This does not mean that areas with CO 2 levels in excess of 1,000 ppm are considered hazardous and should be evacuated, but rather these levels should be used as a guideline to help maximize comfort for all occupants (NIOSH, 1991). Government regulatory agencies and occupational health professional organizations have established levels of carbon dioxide that the average worker may be exposed to on a regular basis (the typical 40 hour work week) without any adverse effects. These levels range from 5,000 to 10,000. All of the CO 2 measurements recorded on the days of the investigation were near or below the ASHRAE recommended guideline of 1,000 ppm for human comfort. The CO 2 measurements are unlikely to be indicative of human discomfort and/or inadequate ventilation. Carbon Monoxide Carbon monoxide (CO) is a by-product formed by incomplete combustion of a variety of flammable materials. Indoor sources can result from malfunctions of the heating, ventilation, and air conditioning (HVAC) system, fossil-fueled hot water heaters, or outside contaminants being drawn into the building through the HVAC system. Several governmental agencies and professional organizations have established levels to assess/regulate exposure, typically in a manufacturing/industrial environment. These levels range between 25 ppm and 35 ppm based on an eight-hour time weighted average. Low or non-detectable levels of carbon monoxide were recorded during this investigation and are unlikely to be a concern at this time. Hydrogen Sulfide Hydrogen sulfide, (H 2S) is a sulfur-based compound with a smell similar to that of rotten eggs. Hydrogen sulfide is frequently associated with sewer gas. Hydrogen sulfide measurements recorded during the investigation were less than the instrument detection limit and are unlikely to represent a potential health concern at this time.

4 Nitrogen Dioxide The most prominent sources of Nitrogen Dioxide (NO 2) are internal combustion engines burning fossil fuels. Outdoors, NO 2 can be a result of traffic from motor vehicles. The levels of NO 2 in High Point School were all less than the instrument detection limit and unlikely to represent a health concern at this time. Hydrocarbons Hydrocarbons, (HC) are organic compounds frequently associated with the incomplete combustion of natural gas and/or other fossil fuels. Hydrocarbon measurements were collected in part to ensure proper operation of the facility s HVAC systems. Hydrocarbon measurements were recorded as a percentage of the Lower Explosive Limit (LEL). The LEL is an airborne hydrocarbon level, which represents the percent explosiveness or flammability of airborne hydrocarbons. The Occupational Safety and Health Administration (OSHA) has established 10% of the LEL as a level to which building occupants or employees may be exposed with minimal risk. During the investigation, hydrocarbon measurements were very low or less than the instrument detection limit. Hydrocarbons are unlikely to represent a potential health concern at this time. Percent Oxygen Oxygen is a colorless, odorless, naturally occurring gaseous element essential to life processes and combustion. In ambient atmospheres, oxygen generally represents 21% of air. Nitrogen represents the other major component of ambient air (79%). Generally established governmental guidelines have determined percent oxygen levels in air that are acceptable for human exposure. These guidelines establish a range of oxygen in the air to which to humans may be exposed without the need of respiratory protection and/or a supplemental oxygen source. These range from 19.5% to 23.5%. All of the oxygen levels recorded during this investigation were within the established guidelines. TO-15 VOC SAMPLING RESULTS TO-15 analysis is a method of ambient air collection through a summa canister and analysis for a wide range of volatile organic compounds (VOCs). TO-15 analysis allows for identification of VOCs at trace levels. Three TO-15 samples were collected as part of this IAQ investigation within Rooms A1, A5 and C8. The compounds identified were at extremely low trace levels. It appears that the possible source of some of the compounds identified could be from typical human uses, such as Ethanol and Ethyl Acetate which could be from perfumes and nail polish. The TO-15 samples were also analyzed for three components of sewer gas. Sewer gas is a mixture of toxic and nontoxic gases that can be present at varying levels depending upon the source. It is formed during the decay of household and industrial waste. Highly toxic components of sewer gas include hydrogen sulfide and ammonia. Results of the air sampling show less than detection limits for both compounds. Sample 01V collected in A5 showed trace amounts of methane, while 02V and 03V showed less than the detection limits.

5 RESPIRABLE DUST SAMPLE RESULTS A total of three respirable dust samples were collected through this IAQ Investigation. One was collected in the A-1, one was collected in A-5 and one collected in the A Centrum. The samples collected in A-1 and A-5 were in areas of concern which the sample collected in the A Centrum was a control sample. Two field blanks were also submitted to the Laboratory for analysis. The MIOSHA permissible exposure limit for respirable dust is 5 milligrams per cubic meter (mg/m³). The results of the three samples collected were not only below the regulatory limit but all at <.29 mg/m³ were below the limit of detection of the analytical method used and, as a result, do not appear to pose an issue. AIRBORNE FUNGAL SPORE SAMPLING Bioaerosols are defined as materials that have been finely divided and suspending in the air (aerosol) that a biological origin or activity (bio-). Or simply, these are living or dead bacteria, mold and fungi or the spores of mold and fungi. Individuals may react to the entire bacteria, mold and fungi or its spores, or react to mycotoxins, the chemicals that the fungi produce as a by-product of their metabolism. These biological particles and mycotoxins can affect different people in different ways and have the potential to cause a variety of physical symptoms. Fungal air sampling can be conducted after a definite source has been identified, as a pro-active means of characterizing a building s air or to possibly eliminate a major fungal infestation as the cause of occupant complaints. Although there are no regulatory standards regarding exposures to molds, comparisons between samples can be reviewed in an attempt to determine if potential indoor mold amplification sites exist, with the results being reported a Fungal Structures/m³. Variables such as outdoor fungal types and concentrations as well as the number and specific types of fungal organisms indoors and their potential sources, must all be considered when interpreting sample results; no one comparison or interpretation is typically appropriate. Fungal air sampling was conducted in order to characterize the indoor fungal spore composition in applicable areas of the building. There were a total of five fungal spore samples collected at the facility. They included 01A (A-1), 02A (A-5), 03A (A-Centrum), 04A (C-Centrum) and 05A (Outdoors). Sample 03A, 04A and O5A were collected as control samples while sample 01A and 02A were collected in the specific areas of concern. As identified on the attached analytical results sheets, the outdoor sample result for total fungal counts per cubic meter (counts/m³) was 200 while the concentration in A-1 was 40 counts/m³, in A-5 was None Detected, in A Centrum was 130 counts/m³ and in C-Centrum was 600 counts/m³. Although the mold types differed, the results within the areas of concern were either low or none-detect. The only sample that was higher than the outdoors sample was collected in the C-Centrum which was a control (not an area of concern). It should be noted that the mold sampling and analysis is a snap shot in time and can vary depending on weather conditions such as temperature and humidity.

6 MERCURY SAMPLING A total of three mercury air samples were collected as part of this investigation. Additionally, two field blanks were analyzed also. The samples were collected in A-1, A-5 and the A-Centrum. The first two were collected in areas of concern while the third sample was collected as a control. The maximum levels for mercury range from milligrams per cubic meter of air (mg/m³), (ACGIH) to 0.1 mg/m³ (OSHA PEL). All three mercury air samples collected within the building were Not detected and, as a result, do not pose a concern at this time. LEAD SAMPLING A total of three lead air samples were collected within the building. Additionally, two field blanks were also submitted to the Laboratory. One sample was collected in A-1, one was collected in A-5 and one was collected in the A-Centrum. According to the OSHA Lead Standard, the Action Level for lead in air is 25 micrograms per cubic meter, (µg/m³) while the Permissible Exposure Limit (PEL) is 50 µg/m³, both based on an 8 hour TWA. The results of the air samples ranged from < 7.2 µg/m³ to < 7.3 µg/m³. The less than sign means that the levels were below the detection limit of the analytical method used, as a result, do not pose a concern at this time.

7 OBSERVATIONS Observations that resulted from the investigation are detailed below. A visual inspection of the specific areas of concern, Rooms A-1 and A-5 did not identify any obvious building pollutants. However, stained ceiling tile were observed in various areas; Results of general parameter measurements were within acceptable ranges and do not appear to pose a health concern at this time; Results of VOC sampling identified several compounds at extremely low levels and do not appear to pose a health concern at this time; Results of respirable dust sampling, airborne mercury sampling and airborne lead sampling were all below the detection limit of the analytical methods used, (negligible or zero). RECOMMENDATIONS Remove and replace stained ceiling tiles within affected spaces as a precautionary measure in order to eliminate a potential source for mold growth or amplification; Consider cleaning the ductwork and diffusers in affected spaces; Increase outdoor fresh air within affected spaces through the HVAC system.

8 Appendix A AIR MONITORING RESULTS

9 . Client: Washtenaw ISD Page: 1 of 1 Building: High Point School Indoor Air Quality Data Sheet General IAQ and Five Gas Monitoring Date: 2/12/2018 Location: Various Nova Representative: T. Fell Project Number: CI0333/HP105 Outside Weather Conditions: 23 F Wind 5-10 MPW, Clear Location A1 A2 A4 A5 A6 A9 A10 C9 C8 C7 Hall between C8 and C7 Time Occ. o F RH % CO 2 CO H 2 S HC % O 2 % Cl 2 NO2 Notes 11:00 AM DO, WC, VO 11:03 AM DO, WC, VO 11:07 AM DO, WC, VO 11:08 AM DO, WC, VO 11:10 AM DO, WC, VO 11:12 AM DC, WC, VO 11:15 AM DO, WC, VO 11:19 AM DC, WC, VO 11:22 AM DO, WC, VO 11:24 AM DO, WC, VO 11:26 AM DO, VO Occ. = Occupancy, o F = Temperature in Degrees Fahrenheit, RH% = Percent Relative Humidity, CO 2 = Carbon Dioxide in Parts Per Million, CO = Carbon Monoxide in Parts Per Million, H 2 S = Hydrogen Sulfide in Parts Per Million, HC % = Percent Hydrocarbons, O 2 % = Percent Oxygen, Cl 2 = Chlorine in Parts Per Million, DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off, Equipment: TSI Q-Trak 8551, BW Technologies Gas Alert Micro 5, RAESystems Toxirae Pro

10 . Client: Washtenaw ISD Page: 1 of 1 Building: High Point School Indoor Air Quality Data Sheet General IAQ and Five Gas Monitoring Date: 2/13/2018 Location: Various Nova Representative: T. Fell Project Number: CI0333/HP105 Outside Weather Conditions: 21 F Wind E 5-12 MPH, Clear Location A9 A6 A5 A1 C8 C7 C9 Electrical Room A2 A4 A Wing Centrum Time Occ. o F RH % CO 2 CO H 2 S HC % O 2 % Cl 2 NO2 Notes 11:26 AM DC, WC, VO 11:30 AM DO, WC, VO 11:37 AM DO, WC, VO 11:45 AM DO, WC, VO 11:53 AM DC, WC, VO 11:56 AM DC, WC, VO 11:58 AM DO, WC, VO 12:00 PM DC, WC, VO 12:05 PM DO, WC, VO 12:09 PM DO, WC, VO 12:11 PM DO, VO Occ. = Occupancy, o F = Temperature in Degrees Fahrenheit, RH% = Percent Relative Humidity, CO 2 = Carbon Dioxide in Parts Per Million, CO = Carbon Monoxide in Parts Per Million, H 2 S = Hydrogen Sulfide in Parts Per Million, HC % = Percent Hydrocarbons, O 2 % = Percent Oxygen, Cl 2 = Chlorine in Parts Per Million, DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off, Equipment: TSI Q-Trak 8551, BW Technologies Gas Alert Micro 5, RAESystems Toxirae Pro

11 Client: Washtenaw ISD Building: High Point Location: Various Project Number: CI0333/HP106. Indoor Air Quality Data Sheet General IAQ and Five Gas Monitoring Page: 1 of 1 Date: 03/05/2018 Nova Representative: Location Boiler Room Boiler Room Boiler Hall Hall outside Pool C-Centrum Cafeteria B-Centrum A1 B5 A-Centrum A5 Time Occ. o F RH % CO 2 CO H 2 S HC % O 2 % Cl 2 9:10 AM :14 AM :19 AM :21 AM :22 AM :23 AM :25 AM :35 AM :44 AM :52 AM :55 AM Notes DC,WC,VO DO,WC,VO DO,WC,VO VO DO,VO DO,WC,VO DO,VO DO,VO DC,WC,VO DC,WC,VO DC,WC,VO Occ. = Occupancy, o F = Temperature in Degrees Fahrenheit, RH% = Percent Relative Humidity, CO 2 = Carbon Dioxide in Parts Per Million, CO = Carbon Monoxide in Parts Per Million, H 2 S = Hydrogen Sulfide in Parts Per Million, HC % = Percent Hydrocarbons, O 2 % = Percent Oxygen, Cl 2 = Chlorine in Parts Per Million, DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off, Equipment: TSI Q-Trak 8551, BW Technologies Gas Alert Micro 5

12 Appendix B TO-15 VOC SAMPLING RESULTS

13 . Client: Washtenaw ISD Page: 1 of 1 Building: High Point School Indoor Air Quality Data Sheet Volatile Organic Compound Air Sampling Date: 2/13/2018-2/14/2018 Location: Various Project Number: CI0333/HP105 Nova Representative: T. Fell Sample Number Location Start Vacuum Start Time Stop Vacuum Stop Time Canister Number Notes 01V A5 - Near Sink :35 AM :17 AM E0470 DO, WC, VO 02V A1 - Center of Room :43 AM :21 AM E0477 DO, WC, VO 03V C8 - Above Sink :53 AM :27 AM E12269 DO, WC, VO DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off

14 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 01V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3245.D Canister ID E0470 Sample Vol cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > Propylene NC ND ND N.E. N.E. Freon 12(Dichlorodifluoromethane) NC Freon 114(1,2-Dichlorotetrafluoroethan ND ND Chloromethane NC LFC n-butane Vinyl chloride C ND ND LFC ,3-Butadiene C ND ND LFC 2200 Bromomethane NC ND ND LFC Chloroethane NC ND ND LFC Ethanol Bromoethene(Vinyl bromide) C ND ND LFC N.E. Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) NC Freon 113(1,1,2-Trichlorotrifluoroethan NC ND ND Acetone NC ,1-Dichloroethene NC ND ND Acetonitrile NC ND ND Tertiary butyl alcohol(tba) ND ND Bromoethane(Ethyl bromide) ND ND Chloropropene(Allyl chloride) C ND ND Carbon disulfide NC ND ND Methylene chloride C ND ND LFC Acrylonitrile C ND ND Methyl-tert-butyl ether(mtbe) C ND ND N.E. N.E. trans-1,2-dichloroethene ND ND n-hexane NC ND ND ,1-Dichloroethane C ND ND Vinyl acetate NC ND ND N.E. 2-Butanone(MEK) NC ND ND cis-1,2-dichloroethene ND ND Ethyl acetate NC Chloroform C ND ND Tetrahydrofuran NC ND ND ,1,1-Trichloroethane NC ND ND Cyclohexane NC ND ND ,2,4-Trimethylpentane(Isooctane) ND ND N.E. N.E. Carbon tetrachloride C ND ND n-heptane NC ND ND ,2-Dichloroethane C ND ND Benzene C ND ND Trichloroethene C ND ND ,2-Dichloropropane C ND ND LFC Methyl Methacrylate NC ND ND Bromodichloromethane C ND ND N.E. N.E. Page 1 of _R1 V101 Page 1 of 2

15 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 01V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3245.D Canister ID E0470 Sample Vol cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > 1,4-Dioxane C ND ND Methyl-2-pentanone(MIBK) NC ND ND cis-1,3-dichloropropene** C ND ND 4500 N.E. Toluene NC ND ND trans-1,3-dichloropropene** C ND ND 4500 N.E. 1,1,2-Trichloroethane C ND ND Hexanone(MBK) NC ND ND Tetrachloroethene C ND ND LFC Dibromochloromethane ND ND N.E. N.E. 1,2-Dibromoethane C ND ND Chlorobenzene NC ND ND N.E Ethylbenzene C ND ND Xylene (p,m) NC ND ND Xylene (Ortho) NC ND ND Styrene NC ND ND Isopropylbenzene (cumene) NC ND ND Bromoform C ND ND ,1,2,2-Tetrachloroethane C ND ND Ethyltoluene ND ND N.E. N.E. 1,3,5-Trimethylbenzene NC ND ND Chlorotoluene ND ND N.E. 1,2,4-Trimethylbenzene NC ND ND ,3-Dichlorobenzene ND ND N.E. N.E. 1,4-Dichlorobenzene C ND ND LFC Benzyl chloride C ND ND ,2-Dichlorobenzene NC ND ND ,2,4-Trichlorobenzene NC ND ND N.E. Hexachloro-1,3-butadiene C ND ND 210 N.E. Naphthalene C ND ND **The concentrations of each isomer should be added if multiple isomers are The > column is used to flag exceedences as marked present and compared to the total screening level. Exposure Limit Definitions REL= Recommended Exposure Limit, PEL= Permissable Exposure Limit Agency Definitions NIOSH= The National Institute for Occupational Safety and Health Reference Occupational Safety and Health Administration (OSHA) General Industry Air Contaminants Standard (29 CFR ) Toxicity Class (EPA Regionional Screening Levels (RSL) Table, Nov 2017) C= Carcinogenic NC= Non-Carcinogenic Compound Exposure Definitions NE= No Limit Established LFC= Lowest Feasible Concentration NS= No Sscreening Value Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Page 2 of _R1 V101 Page 2 of 2

16 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 02V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3247.D Canister ID E0477 Sample Vol cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > Propylene NC ND ND N.E. N.E. Freon 12(Dichlorodifluoromethane) NC ND ND Freon 114(1,2-Dichlorotetrafluoroethan ND ND Chloromethane NC LFC n-butane Vinyl chloride C ND ND LFC ,3-Butadiene C LFC 2200 Bromomethane NC ND ND LFC Chloroethane NC ND ND LFC Ethanol Bromoethene(Vinyl bromide) C ND ND LFC N.E. Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) NC Freon 113(1,1,2-Trichlorotrifluoroethan NC ND ND Acetone NC ,1-Dichloroethene NC ND ND Acetonitrile NC ND ND Tertiary butyl alcohol(tba) ND ND Bromoethane(Ethyl bromide) ND ND Chloropropene(Allyl chloride) C ND ND Carbon disulfide NC ND ND Methylene chloride C ND ND LFC Acrylonitrile C ND ND Methyl-tert-butyl ether(mtbe) C ND ND N.E. N.E. trans-1,2-dichloroethene ND ND n-hexane NC ND ND ,1-Dichloroethane C ND ND Vinyl acetate NC ND ND N.E. 2-Butanone(MEK) NC ND ND cis-1,2-dichloroethene ND ND Ethyl acetate NC Chloroform C ND ND Tetrahydrofuran NC ND ND ,1,1-Trichloroethane NC ND ND Cyclohexane NC ND ND ,2,4-Trimethylpentane(Isooctane) ND ND N.E. N.E. Carbon tetrachloride C ND ND n-heptane NC ND ND ,2-Dichloroethane C ND ND Benzene C ND ND Trichloroethene C ND ND ,2-Dichloropropane C ND ND LFC Methyl Methacrylate NC ND ND Bromodichloromethane C ND ND N.E. N.E. Page 3 of _R1 V101 Page 1 of 2

17 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 02V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3247.D Canister ID E0477 Sample Vol cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > 1,4-Dioxane C ND ND Methyl-2-pentanone(MIBK) NC ND ND cis-1,3-dichloropropene** C ND ND 4500 N.E. Toluene NC trans-1,3-dichloropropene** C ND ND 4500 N.E. 1,1,2-Trichloroethane C ND ND Hexanone(MBK) NC ND ND Tetrachloroethene C ND ND LFC Dibromochloromethane ND ND N.E. N.E. 1,2-Dibromoethane C ND ND Chlorobenzene NC ND ND N.E Ethylbenzene C ND ND Xylene (p,m) NC ND ND Xylene (Ortho) NC ND ND Styrene NC ND ND Isopropylbenzene (cumene) NC ND ND Bromoform C ND ND ,1,2,2-Tetrachloroethane C ND ND Ethyltoluene ND ND N.E. N.E. 1,3,5-Trimethylbenzene NC ND ND Chlorotoluene ND ND N.E. 1,2,4-Trimethylbenzene NC ND ND ,3-Dichlorobenzene ND ND N.E. N.E. 1,4-Dichlorobenzene C ND ND LFC Benzyl chloride C ND ND ,2-Dichlorobenzene NC ND ND ,2,4-Trichlorobenzene NC ND ND N.E. Hexachloro-1,3-butadiene C ND ND 210 N.E. Naphthalene C ND ND **The concentrations of each isomer should be added if multiple isomers are The > column is used to flag exceedences as marked present and compared to the total screening level. Exposure Limit Definitions REL= Recommended Exposure Limit, PEL= Permissable Exposure Limit Agency Definitions NIOSH= The National Institute for Occupational Safety and Health Reference Occupational Safety and Health Administration (OSHA) General Industry Air Contaminants Standard (29 CFR ) Toxicity Class (EPA Regionional Screening Levels (RSL) Table, Nov 2017) C= Carcinogenic NC= Non-Carcinogenic Compound Exposure Definitions NE= No Limit Established LFC= Lowest Feasible Concentration NS= No Sscreening Value Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Page 4 of _R1 V101 Page 2 of 2

18 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 03V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3248.D Canister ID E12269 Sample Vol. 350 cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > Propylene NC ND ND N.E. N.E. Freon 12(Dichlorodifluoromethane) NC Freon 114(1,2-Dichlorotetrafluoroethan ND ND Chloromethane NC LFC n-butane Vinyl chloride C ND ND LFC ,3-Butadiene C ND ND LFC 2200 Bromomethane NC ND ND LFC Chloroethane NC ND ND LFC Ethanol E Bromoethene(Vinyl bromide) C ND ND LFC N.E. Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) NC Freon 113(1,1,2-Trichlorotrifluoroethan NC ND ND Acetone NC ,1-Dichloroethene NC ND ND Acetonitrile NC ND ND Tertiary butyl alcohol(tba) ND ND Bromoethane(Ethyl bromide) ND ND Chloropropene(Allyl chloride) C ND ND Carbon disulfide NC ND ND Methylene chloride C ND ND LFC Acrylonitrile C ND ND Methyl-tert-butyl ether(mtbe) C ND ND N.E. N.E. trans-1,2-dichloroethene ND ND n-hexane NC ND ND ,1-Dichloroethane C ND ND Vinyl acetate NC ND ND N.E. 2-Butanone(MEK) NC ND ND cis-1,2-dichloroethene ND ND Ethyl acetate NC Chloroform C ND ND Tetrahydrofuran NC ND ND ,1,1-Trichloroethane NC ND ND Cyclohexane NC ND ND ,2,4-Trimethylpentane(Isooctane) ND ND N.E. N.E. Carbon tetrachloride C ND ND n-heptane NC ND ND ,2-Dichloroethane C ND ND Benzene C ND ND Trichloroethene C ND ND ,2-Dichloropropane C ND ND LFC Methyl Methacrylate NC ND ND Bromodichloromethane C ND ND N.E. N.E. Page 5 of _R1 V101 Page 1 of 2

19 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 03V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3248.D Canister ID E12269 Sample Vol. 350 cc Dil. Factor 1 NIOSH and OSHA Exposure Limit Comparisons Tox. Result Result NIOSH REL OSHA PEL Target Compounds Basis CAS# MW ppbv Q ug/m3 ug/m3 > ug/m3 > 1,4-Dioxane C ND ND Methyl-2-pentanone(MIBK) NC ND ND cis-1,3-dichloropropene** C ND ND 4500 N.E. Toluene NC trans-1,3-dichloropropene** C ND ND 4500 N.E. 1,1,2-Trichloroethane C ND ND Hexanone(MBK) NC ND ND Tetrachloroethene C ND ND LFC Dibromochloromethane ND ND N.E. N.E. 1,2-Dibromoethane C ND ND Chlorobenzene NC ND ND N.E Ethylbenzene C ND ND Xylene (p,m) NC ND ND Xylene (Ortho) NC ND ND Styrene NC ND ND Isopropylbenzene (cumene) NC ND ND Bromoform C ND ND ,1,2,2-Tetrachloroethane C ND ND Ethyltoluene ND ND N.E. N.E. 1,3,5-Trimethylbenzene NC ND ND Chlorotoluene ND ND N.E. 1,2,4-Trimethylbenzene NC ND ND ,3-Dichlorobenzene ND ND N.E. N.E. 1,4-Dichlorobenzene C ND ND LFC Benzyl chloride C ND ND ,2-Dichlorobenzene NC ND ND ,2,4-Trichlorobenzene NC ND ND N.E. Hexachloro-1,3-butadiene C ND ND 210 N.E. Naphthalene C ND ND **The concentrations of each isomer should be added if multiple isomers are The > column is used to flag exceedences as marked present and compared to the total screening level. Exposure Limit Definitions REL= Recommended Exposure Limit, PEL= Permissable Exposure Limit Agency Definitions NIOSH= The National Institute for Occupational Safety and Health Reference Occupational Safety and Health Administration (OSHA) General Industry Air Contaminants Standard (29 CFR ) Toxicity Class (EPA Regionional Screening Levels (RSL) Table, Nov 2017) C= Carcinogenic NC= Non-Carcinogenic Compound Exposure Definitions NE= No Limit Established LFC= Lowest Feasible Concentration NS= No Sscreening Value Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Page 6 of _R1 V101 Page 2 of 2

20 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 01V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3245.D Canister ID E0470 Sample Vol cc Dil. Factor 1 Possible Background Sources of Contaminants Result Result Target Compounds CAS# ppbv Q ug/m3 Freon 12(Dichlorodifluoromethane) Chloromethane n-butane Ethanol Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) Acetone Ethyl acetate Use and Possible Sources Refrigerant (CFCs) and cleaning solvent. Was phased out as a refrigerant in Most (99%) of the chloromethane in the environment comes from natural sources. Because chloromethane is made in the oceans by natural processes, it is present in air all over the world. In most areas, the outside air contains less than 1 part of chloromethane in a billion parts of air (ppb). In cities, human activities, mostly combustion and manufacturing, add to the chloromethane in the air, resulting in somewhat higher levels, up to 1 ppb. Cigarette smoke, polystyrene insulation, and aerosol propellants; home burning of wood, coal, or certain plastics; and chlorinated swimming pools. 4 Aerosol spray products for some paints, cosmetics, automotive products, leather treatments, pesticides. 2 Hand sanitizers, disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Refrigerant from air conditioners, freezers, refrigerators, dehumidifiers. 2 Eye Glass Cleaners. Disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Rubber cement, cleaning fluids, scented candles and nail polish remover. 1 Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Sources References (1) NJDEP "Common Household Sources of Background Indoor Air Contamination". June 26, 2012 (2) NYSDOH "Volatile Organic Compounds (VOCs) in Commonly Used Products", 2007 (3) EPA, Air & Radiation, TTN Web - Technology Transfer NetworkAir Toxics Web site, various years. (4) Agency for Toxic Substances and Disease Registry (ATSDR). U.S. Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA (5) OFFICE OF POLLUTION PREVENTION AND TOXICS, U.S. ENVIRONMENTAL PROTECTION AGENCY, August 1994, EPA 749-F a (6) U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH (7) World Health Organization, (8) Product Safety Assessment, Revised: November 19, 2010 The Dow Chemical Company (9) California Office of Environmental Health Hazard Assessment, PROPOSED ACTION LEVEL FOR 2-CHLOROTOLUENE (10) Delaware Health and Social Services, Division of Public Health, Revised: 01/2010 (11) USEPA, Envirofacts Master Chemical Integrator (EMCI), Scorecard, 4 / 10 / 2009 Page 7 of _R0.xlsm V100 Page 3 of 3

21 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 02V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3247.D Canister ID E0477 Sample Vol cc Dil. Factor 1 Possible Background Sources of Contaminants Result Result Target Compounds CAS# ppbv Q ug/m3 Chloromethane n-butane ,3-Butadiene Ethanol Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) Acetone Ethyl acetate Toluene Use and Possible Sources Most (99%) of the chloromethane in the environment comes from natural sources. Because chloromethane is made in the oceans by natural processes, it is present in air all over the world. In most areas, the outside air contains less than 1 part of chloromethane in a billion parts of air (ppb). In cities, human activities, mostly combustion and manufacturing, add to the chloromethane in the air, resulting in somewhat higher levels, up to 1 ppb. Cigarette smoke, polystyrene insulation, and aerosol propellants; home burning of wood, coal, or certain plastics; and chlorinated swimming pools. 4 Aerosol spray products for some paints, cosmetics, automotive products, leather treatments, pesticides. 2 1,3-Butadiene is a chemical made from the processing of petroleum. It is the 36th highest volume chemical produced in the United States. It is a colorless gas with a mild gasoline-like odor. About 75% of the manufactured 1,3- butadiene is used to make synthetic rubber. Synthetic rubber is widely used for tires on cars and trucks. 1,3- Butadiene is also used to make plastics including acrylics. Small amounts are found in gasoline. Automobile exhaust and residential wood combustion. 4 Hand sanitizers, disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Refrigerant from air conditioners, freezers, refrigerators, dehumidifiers. 2 Eye Glass Cleaners. Disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Rubber cement, cleaning fluids, scented candles and nail polish remover. 1 Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Toluene is produced in the process of making gasoline and other fuels from crude oil and making coke from coal. Will occur in gasoline exhaust. Toluene is used in making paints, paint thinners, fingernail polish, lacquers, adhesives, and rubber and in some printing and leather tanning processes. 4 Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Sources References (1) NJDEP "Common Household Sources of Background Indoor Air Contamination". June 26, 2012 (2) NYSDOH "Volatile Organic Compounds (VOCs) in Commonly Used Products", 2007 (3) EPA, Air & Radiation, TTN Web - Technology Transfer NetworkAir Toxics Web site, various years. (4) Agency for Toxic Substances and Disease Registry (ATSDR). U.S. Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA Page 8 of _R0.xlsm V100 Page 3 of 4

22 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 02V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3247.D Canister ID E0477 Sample Vol cc Dil. Factor 1 Possible Background Sources of Contaminants Result Result Target Compounds CAS# ppbv Q ug/m3 (5) OFFICE OF POLLUTION PREVENTION AND TOXICS, U.S. ENVIRONMENTAL PROTECTION AGENCY, August 1994, EPA 749-F a (6) U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH (7) World Health Organization, (8) Product Safety Assessment, Revised: November 19, 2010 The Dow Chemical Company (9) California Office of Environmental Health Hazard Assessment, PROPOSED ACTION LEVEL FOR 2-CHLOROTOLUENE (10) Delaware Health and Social Services, Division of Public Health, Revised: 01/2010 (11) USEPA, Envirofacts Master Chemical Integrator (EMCI), Scorecard, 4 / 10 / 2009 Use and Possible Sources Page 9 of _R0.xlsm V100 Page 4 of 4

23 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 03V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3248.D Canister ID E12269 Sample Vol. 350 cc Dil. Factor 1 Possible Background Sources of Contaminants Result Result Target Compounds CAS# ppbv Q ug/m3 Freon 12(Dichlorodifluoromethane) Chloromethane n-butane Ethanol E 170 Freon 11(Trichlorofluoromethane) Isopropyl alcohol(2-propanol) Acetone Ethyl acetate Toluene Use and Possible Sources Refrigerant (CFCs) and cleaning solvent. Was phased out as a refrigerant in Most (99%) of the chloromethane in the environment comes from natural sources. Because chloromethane is made in the oceans by natural processes, it is present in air all over the world. In most areas, the outside air contains less than 1 part of chloromethane in a billion parts of air (ppb). In cities, human activities, mostly combustion and manufacturing, add to the chloromethane in the air, resulting in somewhat higher levels, up to 1 ppb. Cigarette smoke, polystyrene insulation, and aerosol propellants; home burning of wood, coal, or certain plastics; and chlorinated swimming pools. 4 Aerosol spray products for some paints, cosmetics, automotive products, leather treatments, pesticides. 2 Hand sanitizers, disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Refrigerant from air conditioners, freezers, refrigerators, dehumidifiers. 2 Eye Glass Cleaners. Disinfecting wipes. Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Rubber cement, cleaning fluids, scented candles and nail polish remover. 1 Personal care products: nail polish, nail polish remover, colognes, perfumes, rubbing alcohol, hair spray. 2 Toluene is produced in the process of making gasoline and other fuels from crude oil and making coke from coal. Will occur in gasoline exhaust. Toluene is used in making paints, paint thinners, fingernail polish, lacquers, adhesives, and rubber and in some printing and leather tanning processes. 4 Qualifier Definitions ND = Non Detect B = Compound also found in method blank. E= Estimated concentration exceeding upper calibration range. D= Result reported from diluted analysis. Sources References (1) NJDEP "Common Household Sources of Background Indoor Air Contamination". June 26, 2012 (2) NYSDOH "Volatile Organic Compounds (VOCs) in Commonly Used Products", 2007 (3) EPA, Air & Radiation, TTN Web - Technology Transfer NetworkAir Toxics Web site, various years. (4) Agency for Toxic Substances and Disease Registry (ATSDR). U.S. Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA (5) OFFICE OF POLLUTION PREVENTION AND TOXICS, U.S. ENVIRONMENTAL PROTECTION AGENCY, August 1994, EPA 749-F a (6) U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH (7) World Health Organization, (8) Product Safety Assessment, Revised: November 19, 2010 The Dow Chemical Company (9) California Office of Environmental Health Hazard Assessment, PROPOSED ACTION LEVEL FOR 2-CHLOROTOLUENE (10) Delaware Health and Social Services, Division of Public Health, Revised: 01/2010 (11) USEPA, Envirofacts Master Chemical Integrator (EMCI), Scorecard, 4 / 10 / 2009 Page 10 of _R0.xlsm V100 Page 3 of 4

24 EMSL Analytical 200 Route 130 North, Cinnaminson, NJ Phone/Fax: (856) / (856) to15lab@emsl.com EMSL Order #: EMSL Sample #: Customer ID: NOVA53 Customer PO: WISD Phone: Fax: Date Collected: Date Received: /13/2018 2/15/2018 Project: CI0333 / HP105 Sample ID: 03V Analysis Initial Analysis Date 02/22/2018 Analyst Init. TP Lab File ID J3248.D Canister ID E12269 Sample Vol. 350 cc Dil. Factor 1 Possible Background Sources of Contaminants Result Result Target Compounds CAS# ppbv Q ug/m3 Use and Possible Sources Page 11 of _R0.xlsm V100 Page 4 of 4

25 Appendix C RESPIRABLE DUST SAMPLING RESULTS

26 Client: Washtenaw ISD Building: High Point Location:Various Project Number: CI0333/HP106. Indoor Air Quality Data Sheet Dust Air Sampling Page: 1 of 1 Date: 03/05/2018 Nova Representative: Sample Number Location Pump I.D. Start Time Stop Time Sample Time (min) Start Flow Rate (L/m) Stop Flow Rate (L/m) Volume (L) Notes 01R A1 25 8:55 AM 10:05 AM DC,WC,VO 02R A5 35 9:00 AM 10:10 AM DC,WC,VO 03R A Centrum 68 9:01 AM 10:11 AM DO,VO DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off Occupational Safety and Health Administration (OSHA) Nuisance Dust Permissible Exposure Limit (PEL) as an 8-hour Time Weighted Average (TWA) = 15 milligrams per cubic meter (mg/m 3 )

27 EMSL Analytical, Inc CastlePlace Dr., Indianapolis, IN Phone/Fax: (317) / (317) indianapolislab@emsl.com EMSL Order: CustomerID: CustomerPO: ProjectID: NOVA53 Phone: (734) Fax: (734) Received: 03/09/18 10:10 AM Analysis Date: 03/09/18 Collected: 03/07/18 Project: CI0333/HP106 Test Report: Respirable Dust Analysis (Gravimetric) of Air Samples NIOSH 0600, Issue 3, 1/15/98 Sample Location Volume (L) Sample Weight (mg) Concentration (mg/m³) Reporting Limit (mg/m³) Notes CI0333/HP106-01R A <0.050 < CI0333/HP106-02R A <0.050 < CI0333/HP106-03R A Centrum <0.050 < CI0333/HP106- FB1 0 <0.050 N/A N\A Field Blank CI0333/HP106- FB2 0 <0.050 N/A N\A Field Blank Notes: Discernable field blank submitted with samples. Results are not field blank corrected. Analyst(s) Alex Neligh (5) Doug Wiegand, Laboratory Manager or other approved signatory The laboratory is not responsible for data reported in mg/m3, which is dependent on volume collected by non-laboratory personnel. Reporting Limits for samples without volumes, such as Field Blanks, are 0.05 mg. This report relates only to the samples reported above. This report may not be reproduced, except in full, without written approval by EMSL. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Indianapolis, IN AIHA-LAP, LLC--IHLAP Accredited # Initial report from 03/09/ :08:45 Test Report IHNuisanceDust Printed: 03/09/18 5:08:45 PM THIS IS THE LAST PAGE OF THE REPORT. 1

28 Appendix D FUNGAL SPORE SAMPLING RESULTS

29 Client: Washtenaw ISD Building: High Point Location: Various Project Number: CI0333/HP106. Indoor Air Quality Data Sheet Fungal Spore Air Sampling Page: 1 of 1 Date: 03/05/2018 Nova Representative: Huda Zwen Outside Weather Conditions: 33 o Sunny Sample Number Location Pump I.D. Start Time Stop Time Sample Time (min) Start Flow Rate (L/min) Stop Flow Rate (L/min) Volume (L) Notes 01A A :39:00 AM 11:44:00 AM DC,WC,VF 02A A :47:00 AM 11:52:00 AM DC,WC,VO 03A A-Centrum 52 11:55:00 AM 12:00:00 PM VO 04A C-Centrum 52 12:16:00 PM 12:21:00 PM VO,DO 05A Exterior 52 12:31:00 PM 12:36:00 PM N/A DO = Door Open, DC = Door Closed, WO = Windows Open, WC = Windows Closed, VO = Vent On, VF = Vent Off, AFL = Above Floor Level, AGL = Above Ground Level min = minutes, L = Liters, Cassette: Zefon Air-O-Cell

30 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP Description of Analysis EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Analytical Laboratory EMSL Analytical, Inc. (EMSL) is a nationwide, full service, analytical testing laboratory network providing Asbestos, Mold, Indoor Air Quality, Microbiological, Environmental, Chemical, Forensic, Materials, Industrial Hygiene and Mechanical Testing services since Ranked as the premier independently owned environmental testing laboratory in the nation, EMSL puts analytical quality as its top priority. This quality is recognized by many well-respected federal, state and private accrediting agencies, such as AIHA-LAP, LLC's EMLAP and proficiency testing providers such as AIHA, LLC's EMPAT programs, and assured by our high quality personnel, including many Ph.D. microbiologists and mycologists. EMSL is an independent laboratory that performed the analysis of these samples. EMSL did not conduct the sampling or site investigation for this report. The samples referenced herein were analyzed under strict quality control procedures using state-of-the-art microbiological methods. The analytical methods used and the data presented are scientifically and legally defensible. The laboratory data is provided in compliance with AIHA-LAP, LLC policy modules and ISO-IEC guidelines for the particular test(s) requested, including any associated limitations for the methods employed. These data are intended for use by professionals having knowledge of the testing methods necessary to interpret them accurately. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 2 of 24

31 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Air Samples - Spore traps: Spore traps are commercially available sampling devices that capture airborne particles on an adhesive slide. Air is pulled through the device using a vacuum pump. Spores, as well as other airborne particles, are impacted on the collection adhesive. Using spore trap collection methods has inherent limitations. These collection methods are biased towards larger spore sizes. The analysis for total spore counts is a direct microscopic examination and does not include culturing or growing the fungi. Therefore, the results include both viable and non-viable spores. Some fungal groups produce similar spore types that cannot be distinguished by direct microscopic examination alone (i.e., Aspergillus/Penicillium, and others). Other spore types may lack distinguishing features that aid in their identification. These types are grouped into larger categories such as Ascospores or Basidiospores. Fungal spores are identified and grouped by morphological characteristics including color, shape, septation, ornamentation, and fruiting structures (if present) which are compared to published mycological identification keys and texts. EMSL reports provide spore counts per cubic meter of air to three significant figures. Please note that each spore category is reported to three significant figures. Due to rounding and the application of three significant figures the sum of the individual spore numbers may not equal the total spore count on the report. EMSL does not maintain responsibility for final volume concentrations (counts/m3) since this volume is provided by the field collector and can not be verified by EMSL. EMSL analyzes spore traps using phase contrast microscopy. There is a wide choice of collection devices (Air-O-Cell, Micro-5, Burkhard, etc.) on the market. Differences in analytical method may exist between spore trap devices. Spore trap results are reported in spores per cubic meter of air. Due to the other airborne particles collected with the spores, EMSL reports a background particle density. Background density is an indication of overall particulate matter present on the sample (i.e. dust in the air). High background concentrations may obscure spores such as the Penicillium/Aspergillus group. The rating system is from 1-5 with 1 = 1-25% of the background obscured by material, 2 = 26-50%, 3 = 51-75%, 4 = 76% - 99%, 5 = 100% or overloaded. A background rating of 4 or higher should be regarded as a minimum count since the actual concentrations may be higher than those reported. EMSL will not be held responsible for overloading of samples. Sample volumes are left to the discretion of the company or persons conducting the fieldwork. Skin fragment density is the percentage of skin cells making up the total background material, 1 = 1-25%, 2 = 26-50%, 3 = 51-75%, 4 = %. Skin fragment density is considered an indication of the general cleanliness in the area sampled. It has been This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 3 of 24

32 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: estimated that up to 90% of household dust consists of dead skin cells NOVA53 2. Analytical Results See attached data reports and charts. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 4 of 24

33 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391) Lab Sample Number Client Sample ID CI0133/HP106-01A Location A1 Sample Volume (L) Sample Type Inside Comments Other Particle Identification Sample Concentration (counts/m³) Background Concentration (counts/m³) Background Corrected (counts/m³) Alternaria None Detected None Detected Ascospores None Detected None Detected Aspergillus/Penicillium None Detected None Detected Basidiospores 40 None Detected 40 Bipolaris++ None Detected None Detected Chaetomium None Detected None Detected Cladosporium None Detected 200 Less than Background Curvularia None Detected None Detected Epicoccum None Detected None Detected Fusarium None Detected None Detected Ganoderma None Detected None Detected Myxomycetes++ None Detected None Detected Pithomyces None Detected None Detected Rust None Detected None Detected Scopulariopsis None Detected None Detected Stachybotrys None Detected None Detected Torula None Detected None Detected Ulocladium None Detected None Detected Unidentifiable Spores None Detected None Detected Zygomycetes None Detected None Detected Total Fungi Less than Background Hyphal Fragment None Detected None Detected Insect Fragment None Detected None Detected Pollen None Detected None Detected Analytical Sensitivity 600x: Analytical Sensitivity 300x *: Skin Fragments: Fibrous Particulate: Background: No discernable field blank was submitted with this group of samples. 43 counts/cubic meter 14* counts/cubic meter 1 1 to 4 (low to high) 1 1 to 4 (low to high) 1 1 to 4 (low to high); 5 (overloaded) Bipolaris++ = Bipolaris/Dreschlera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut Margaret Snyder, Microbiology Manager or Other Approved Signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. 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. 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. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Ann Arbor, MI AIHA-LAP, LLC--EMLAP Accreditation # Initial report from: 03/07/ :22:54 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 5 of 24

34 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391) Lab Sample Number Client Sample ID CI0133/HP106-02A Location A5 Sample Volume (L) Sample Type Inside Comments Other Particle Identification Sample Concentration (counts/m³) Background Concentration (counts/m³) Background Corrected (counts/m³) Alternaria None Detected None Detected Ascospores None Detected None Detected Aspergillus/Penicillium None Detected None Detected Basidiospores None Detected None Detected Bipolaris++ None Detected None Detected Chaetomium None Detected None Detected Cladosporium None Detected 200 Less than Background Curvularia None Detected None Detected Epicoccum None Detected None Detected Fusarium None Detected None Detected Ganoderma None Detected None Detected Myxomycetes++ None Detected None Detected Pithomyces None Detected None Detected Rust None Detected None Detected Scopulariopsis None Detected None Detected Stachybotrys None Detected None Detected Torula None Detected None Detected Ulocladium None Detected None Detected Unidentifiable Spores None Detected None Detected Zygomycetes None Detected None Detected Total Fungi None Detected 200 Less than Background Hyphal Fragment 10* None Detected 10 Insect Fragment None Detected None Detected Pollen None Detected None Detected Analytical Sensitivity 600x: Analytical Sensitivity 300x *: Skin Fragments: Fibrous Particulate: Background: No discernable field blank was submitted with this group of samples. 43 counts/cubic meter 14* counts/cubic meter 1 1 to 4 (low to high) 1 1 to 4 (low to high) 1 1 to 4 (low to high); 5 (overloaded) Bipolaris++ = Bipolaris/Dreschlera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut Margaret Snyder, Microbiology Manager or Other Approved Signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. 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. 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. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Ann Arbor, MI AIHA-LAP, LLC--EMLAP Accreditation # Initial report from: 03/07/ :22:54 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 6 of 24

35 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391) Lab Sample Number Client Sample ID CI0133/HP106-03A Location A Centrum Sample Volume (L) Sample Type Inside Comments Other Particle Identification Sample Concentration (counts/m³) Background Concentration (counts/m³) Background Corrected (counts/m³) Alternaria None Detected None Detected Ascospores None Detected None Detected Aspergillus/Penicillium 90 None Detected 90 Basidiospores None Detected None Detected Bipolaris++ None Detected None Detected Chaetomium None Detected None Detected Cladosporium Less than Background Curvularia None Detected None Detected Epicoccum None Detected None Detected Fusarium None Detected None Detected Ganoderma None Detected None Detected Myxomycetes++ None Detected None Detected Pithomyces None Detected None Detected Rust None Detected None Detected Scopulariopsis None Detected None Detected Stachybotrys None Detected None Detected Torula None Detected None Detected Ulocladium None Detected None Detected Unidentifiable Spores None Detected None Detected Zygomycetes None Detected None Detected Total Fungi Less than Background Hyphal Fragment 100 None Detected 100 Insect Fragment None Detected None Detected Pollen None Detected None Detected Analytical Sensitivity 600x: Analytical Sensitivity 300x *: Skin Fragments: Fibrous Particulate: Background: No discernable field blank was submitted with this group of samples. 43 counts/cubic meter 14* counts/cubic meter 2 1 to 4 (low to high) 1 1 to 4 (low to high) 2 1 to 4 (low to high); 5 (overloaded) Bipolaris++ = Bipolaris/Dreschlera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut Margaret Snyder, Microbiology Manager or Other Approved Signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. 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. 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. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Ann Arbor, MI AIHA-LAP, LLC--EMLAP Accreditation # Initial report from: 03/07/ :22:54 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 7 of 24

36 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391) Lab Sample Number Client Sample ID CI0133/HP106-04A Location C Centrum Sample Volume (L) Sample Type Inside Comments Other Particle Identification Sample Concentration (counts/m³) Background Concentration (counts/m³) Background Corrected (counts/m³) Alternaria None Detected None Detected Ascospores None Detected None Detected Aspergillus/Penicillium None Detected None Detected Basidiospores None Detected None Detected Bipolaris++ None Detected None Detected Chaetomium 560 None Detected 560 Cladosporium None Detected 200 Less than Background Curvularia None Detected None Detected Epicoccum None Detected None Detected Fusarium None Detected None Detected Ganoderma 40 None Detected 40 Myxomycetes++ None Detected None Detected Pithomyces None Detected None Detected Rust None Detected None Detected Scopulariopsis None Detected None Detected Stachybotrys None Detected None Detected Torula None Detected None Detected Ulocladium None Detected None Detected Unidentifiable Spores None Detected None Detected Zygomycetes None Detected None Detected Total Fungi Hyphal Fragment 40 None Detected 40 Insect Fragment None Detected None Detected Pollen None Detected None Detected Analytical Sensitivity 600x: Analytical Sensitivity 300x *: Skin Fragments: Fibrous Particulate: Background: No discernable field blank was submitted with this group of samples. 43 counts/cubic meter 14* counts/cubic meter 2 1 to 4 (low to high) 1 1 to 4 (low to high) 1 1 to 4 (low to high); 5 (overloaded) Bipolaris++ = Bipolaris/Dreschlera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut Margaret Snyder, Microbiology Manager or Other Approved Signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. 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. 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. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Ann Arbor, MI AIHA-LAP, LLC--EMLAP Accreditation # Initial report from: 03/07/ :22:54 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 8 of 24

37 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Test Report: Air-O-Cell( ) Analysis of Fungal Spores & Particulates by Optical Microscopy (Methods MICRO-SOP-201, ASTM D7391) Lab Sample Number Client Sample ID CI0133/HP106-05A Location Exterior Sample Volume (L) Sample Type Background Comments Other Particle Identification Sample Concentration (counts/m³) Background Concentration (counts/m³) Background Corrected (counts/m³) Alternaria None Detected N/A N/A Ascospores None Detected N/A N/A Aspergillus/Penicillium None Detected N/A N/A Basidiospores None Detected N/A N/A Bipolaris++ None Detected N/A N/A Chaetomium None Detected N/A N/A Cladosporium 200 N/A N/A Curvularia None Detected N/A N/A Epicoccum None Detected N/A N/A Fusarium None Detected N/A N/A Ganoderma None Detected N/A N/A Myxomycetes++ None Detected N/A N/A Pithomyces None Detected N/A N/A Rust None Detected N/A N/A Scopulariopsis None Detected N/A N/A Stachybotrys None Detected N/A N/A Torula None Detected N/A N/A Ulocladium None Detected N/A N/A Unidentifiable Spores None Detected N/A N/A Zygomycetes None Detected N/A N/A Total Fungi 200 N/A N/A Hyphal Fragment None Detected N/A N/A Insect Fragment None Detected N/A N/A Pollen None Detected N/A N/A Analytical Sensitivity 600x: Analytical Sensitivity 300x *: Skin Fragments: Fibrous Particulate: Background: No discernable field blank was submitted with this group of samples. 43 counts/cubic meter 14* counts/cubic meter 1 1 to 4 (low to high) 1 1 to 4 (low to high) 2 1 to 4 (low to high); 5 (overloaded) Bipolaris++ = Bipolaris/Dreschlera/Exserohilum Myxomycetes++ = Myxomycetes/Periconia/Smut Margaret Snyder, Microbiology Manager or Other Approved Signatory High levels of background particulate can obscure spores and other particulates leading to underestimation. Background levels of 5 indicate an overloading of background particulates, prohibiting accurate detection and quantification. 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. 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. Interpretation and use of test results are the responsibility of the client. Samples received in good condition unless otherwise noted. Samples analyzed by EMSL Analytical, Inc. Ann Arbor, MI AIHA-LAP, LLC--EMLAP Accreditation # Initial report from: 03/07/ :22:54 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 9 of 24

38 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Spore Trap Report: Total Counts Basidiospores 40 A1 CI0133/HP106-01A ,000 10, ,000 1,000,000 Spore Counts per m3 Aspergillus/Penicillium Basidiospores Chaetomium Cladosporium Ganoderma * The chart is displayed using a logarithmic scale. Bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 10 of 24

39 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Spore Trap Report: Total Counts A5 CI0133/HP106-02A ,000 10, ,000 1,000,000 Spore Counts per m3 Aspergillus/Penicillium Basidiospores Chaetomium Cladosporium Ganoderma * The chart is displayed using a logarithmic scale. Bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 11 of 24

40 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Spore Trap Report: Total Counts Aspergillus/Penicillium 90 A Centrum CI0133/HP106-03A Cladosporium ,000 10, ,000 1,000,000 Spore Counts per m3 Aspergillus/Penicillium Basidiospores Chaetomium Cladosporium Ganoderma * The chart is displayed using a logarithmic scale. Bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 12 of 24

41 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Spore Trap Report: Total Counts C Centrum CI0133/HP106-04A Chaetomium 560 Ganoderma ,000 10, ,000 1,000,000 Spore Counts per m3 Aspergillus/Penicillium Basidiospores Chaetomium Cladosporium Ganoderma * The chart is displayed using a logarithmic scale. Bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 13 of 24

42 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Spore Trap Report: Total Counts Exterior CI0133/HP106-05A Cladosporium ,000 10, ,000 1,000,000 Spore Counts per m3 Aspergillus/Penicillium Basidiospores Chaetomium Cladosporium Ganoderma * The chart is displayed using a logarithmic scale. Bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 14 of 24

43 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Background Comparison Chart Aspergillus/Penicillium 90 Basidiospores 40 Chaetomium 560 Cladosporium Ganoderma ,000 10, ,000 1,000,000 Spore Counts per m3 CI0133/HP106-01A A1 CI0133/HP106-05A Exterior CI0133/HP106-02A A5 CI0133/HP106-03A A Centrum CI0133/HP106-04A C Centrum * The chart is displayed using a logarithmic scale. The bar size is not directly proportional to the number of spores. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 15 of 24

44 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP Understanding the Results EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 EMSL Analytical, Inc. is an independent laboratory, providing unbiased and scientifically valid results. These data represent only a portion of an overall IAQ investigation. Visual information and environmental conditions measured during the site assessment (humidity, moisture readings, etc.) are crucial to any final interpretation of the results. Many factors impact the final results; therefore, result interpretation should only be conducted by qualified individuals. The American Conference of Governmental Industrial Hygienists (ACGIH) has published a good reference book covering sampling and data interpretation. It is entitled, Bioaerosols: Assessment and Control, Fungal spores are found everywhere. Whether or not symptoms develop in people exposed to fungi depends on the nature of the fungal material (e.g., allergenic, toxic, or infectious), the exposure level, and the susceptibility of exposed persons. Susceptibility varies with the genetic predisposition (e.g., allergic reactions do not always occur in all individuals), age, pre-existing medical conditions (e.g., diabetes, cancer, or chronic lung conditions), use of immunosuppressive drugs, and concurrent exposures. These reasons make it difficult to identify dose/response relationships that are required to establish safe or unsafe levels (i.e., permissible exposure limits). It is generally accepted in the industry that indoor fungal growth is undesirable and inappropriate, necessitating removal or other appropriate remedial actions. The New York City guidelines and EPA guidelines for mold remediation in schools and commercial buildings define the conditions warranting mold remediation. Always remember that water is the key. Preventing water damage or water condensation will prevent mold growth. This report is not intended to provide medical advice or advice concerning the relative safety of an occupied space. Always consult an occupational or environmental health physician who has experience addressing indoor air contaminants if you have any questions. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 16 of 24

45 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP Glossary of Fungi EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 ASPERGILLUS/PENICILLIUM Allergic Potential Industrial Uses Mode of Dissemination Natural Habitat Other Comments Potential or Opportunistic Pathogens Potential Toxins Produced Suitable Substrates in the Indoor Environment Water Activity Type I (hay fever, asthma) Type III (hypersensitivity) Many depending on the species Wind Insects Plant debris Seed Cereal crops Spores of Aspergillus and Penicillium (including others such as Acremonium and Paecilomyces) are small and spherical with few distinguishing characteristics. They cannot be differentiated or speciated by non-viable impaction sampling methods. Some species with very small spores may be undercounted in samples with high background debris. Possible depending on the species. Grows on a wide range of substrates indoors Prevalent in water damaged buildings Foods (blue mold on cereals, fruits, vegetables, dried foods) House dust Fabrics Leather Wallpaper Wallpaper glue Aw= BASIDIOSPORES Allergic Potential Industrial Uses Mode of Dissemination Natural Habitat Other Comments Potential or Opportunistic Pathogens Potential Toxins Produced Suitable Substrates in the Indoor Environment Water Activity Type I allergies (hay fever, asthma). Type III (hypersensitivity pneumonitis) Edible mushrooms are used in the food industry. Forcible ejection. Wind currents. Forest floors. Lawns.Plants (saprobes or pathogens depending on genus) Basidiospores are the result of sexual reproduction and formed on a structure called the basidium. Basidiospores belong to the members of the Phylum Basidiomycota, which includes mushrooms, shelf fungi, rusts, and smuts. Depends on genus. Amanitins. monomethyl-hydrazine. muscarine. ibotenic acid. psilocybin. Depends on genus. Wood products Unknown. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 17 of 24

46 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 CHAETOMIUM Allergic Potential Industrial Uses Mode of Dissemination Natural Habitat Potential or Opportunistic Pathogens Potential Toxins Produced Suitable Substrates in the Indoor Environment Water Activity Type I (asthma and hay fever). Cellulase production, Textile testing. Wind. Insects. Water splash. Dung. Seeds. Soil. Straw. EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Onychomycosis. C. perlucidum recognized as a new agent of cerebral phaeohyphomycosis. Chaetomin. Chaetoglobosins A,B,D and F are produced by Chaetomium globosum. Sterigmatocystin is produced by rare species Paper. Sheetrock. Wallpaper. Aw= CLADOSPORIUM Allergic Potential Industrial Uses Mode of Dissemination Natural Habitat Potential or Opportunistic Pathogens Potential Toxins Produced Type I (asthma and hay fever). Produces 10 antigens. Air Dead plant matter. Straw. Soil. Woody plants Edema. keratitis. onychomycosis. pulmonary infections. Sinusitis. Cladosporin and Emodin. Suitable Substrates in the Fiberglass duct liner. Paint. Textiles. Found in high concentration in water-damaged building Indoor Environment materials. Water Activity Aw This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 18 of 24

47 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 GANODERMA Allergic Potential Industrial Uses Mode of Dissemination Natural Habitat Other Comments Potential or Opportunistic Pathogens Potential Toxins Produced Reference Suitable Substrates in the Indoor Environment Water Activity EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Ganoderma species are known to cause allergies in people on a worldwide scale. Biopulping of wood for the paper industry. Potential medicinal use due to: 1. Inhibition of Ras dependent cell transformation, 2. Antifibrotic activity, 3. Immunomodulating activity, 4. Free-radicle scavenging Wind. Grows on conifers and hardwoods worldwide, causing white rot, root rot, and stem rot. Used in traditional Chinese medicine as an herbal supplement. It is also known as a "shelf fungus" because the fruiting body forms a stalk-less shelf on the sides of trees and logs. It is sometimes called artists conk because when you scratch the white pores of the fruiting body, the white rubs away and exposes the brown hyphae underneath. Thus, pictures can be produced on the fruiting body. Unknown. References: Craig, R.L., Levetin, E Multi-year study of Ganoderma aerobiology. Aerobiologia 16: Unknown. This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 19 of 24

48 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP References and Informational Links EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 20 of 24

49 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 Books EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 Bioaerosols: Assessment and Control. Janet Macher, Ed., American Conference of Governmental Industrial Hygienists, Cincinnati, OH Exposure Guidelines for Residential Indoor Air Quality. Environmental Health Directorate, Health Protection Branch, Health Canada, Ottawa, Ontario, Fungal Contamination in Public Buildings: Health Effects and Investigation Methods. Health Canada, Ottawa, Ontario, IICRC: S500 Standard and Reference Guide for Professional Water Damage Restoration. 3rd Edition, Institute of Inspection, Cleaning, and Restoration Certification, Vancouver, WA, 2006 IICRC: S520 Standard and Reference Guide for Professional Mold Remediation. 1st Edition, Institute of Inspection, Cleaning, and Restoration Certification, Vancouver, WA, 2004 Field Guide for the Determination of Biological Contaminants in Environmental Samples. 2nd Edition, American Industrial Hygiene Association, Consumer Links Read the full text of AIHA s "The Facts About Mold" consumer brochure. < 0MoldDecember2011.pdf> The Occupational Safety and Health Administration (OSHA) CDC Mold Facts CDC Stachybotrys - Questions and answers on Stachybotrys chartarum and other molds IOM, NAS: Clearing the Air: Asthma and Indoor Air Exposures National Library of Medicine-Mold website This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 21 of 24

50 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 California Department of Health Services (CADOHS) Minnesota Department of Health New York City Department of Health and Mental Hygiene < H.R.: The United States Toxic Mold Safety and Protection Act < EPA "Should You Have the Air Ducts in Your Home Cleaned?" < General information about molds and actions that can be taken to clean up or prevent a mold problem. < A Brief Guide to Mold, Moisture, and Your Home - Includes basic information on mold, cleanup guidelines, and moisture and mold prevention Mold Remediation in Schools and Commercial Buildings - Information on remediation in schools and commercial property, references for potential mold and moisture remediators. FEMA Homes That Were Flooded May Harbor Mold Problems - Information and tips for cleaning mold. Dealing With Mold & Mildew in Your Flood Damaged Home. Prompt Flood Cleanup Can Help Prevent Health Problems - How to clean up in-house mold problems (not large or serious exposures). This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 22 of 24

51 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP Important Terms, Conditions, and Limitations EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 A. Sample Retention Samples analyzed by EMSL will be retained for 60 days after analysis date Storage beyond this period is available for a fee with written request prior to the initial 30 day period. Samples containing hazardous/toxic substances which require special handling will be returned to the client immediately. EMSLreserves the right to charge a sample disposal fee or return samples to the client. B. Change Orders and Cancellation All changes in the scope of work or turnaround time requested by the client after sample acceptance must be made in writing and confirmed in writing by EMSL. If requested changes result in a change in cost the client must accept payment responsibility. In the event work is cancelled by a client, EMSL will complete work in progress and invoice for work completed to the point of cancellation notice. EMSL is not responsible for. holding times that are exceeded due to such changes. C. Warranty EMSL warrants to its clients that all services provided hereunder shall be performed in accordance with established and recognized analytical testing procedures and with reasonable care in accordance with applicable federal, state and local laws. The foregoing express warranty is exclusive and is given in lieu of all other warranties, expressed or implied. EMSL disclaims any other warranties, express or implied, including a warranty of fitness for particular purpose and warranty of merchantability. D. Limits of Liability In no event shall EMSL be liable for indirect, special, consequential, or incidental damages, including, but not limited to, damages for loss of profit or goodwill regardless of the negligence (either sole or concurrent) of EMSL and whether EMSL has been informed of the possibility of such damages, arising out of or in connection with EMSL s services thereunder or the delivery, use, reliance upon or interpretation of test results by client or any third party. We accept no legal responsibility for the purposes for which the client uses the test results. EMSL will not be held responsible for the improper selection of sampling devices even if we supply the device to the user. The user of the sampling device has the sole responsibility to select the proper sampler and sampling conditions to insure that a valid sample is taken for analysis. Any resampling performed will be at the sole discretion of EMSL, the cost of which shall be limited to the reasonable value of the original sample delivery group (SDG) This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 23 of 24

52 Proj: EMSL Analytical, Inc. 212 South Wagner Road Ann Arbor, MI Phone: (734) Fax: (734) Web: CI0133/HP106 EMSL Order: Customer ID: Collected: Received: Analyzed: NOVA53 samples. In no event shall EMSL be liable to a client or any third party, whether based upon theories of tort, contract or any other legal or equitable theory, in excess of the amount paid to EMSL by client thereunder. E. Indemnification Client shall indemnify EMSL and its officers, directors and employees and hold each of them harmless for any liability, expense or cost, including reasonable attorney s fees, incurred by reason of any third party claim in connection with EMSL services, the test result data or its use by client This report has been prepared by EMSL Analytical, Inc. at the request of and for the exclusive use of the client named in this report. Completely read the important terms, conditions, and limitations that apply to this report. 2006,EMSL Analytical, Inc., All rights reserved. No part of this report may be reproduced or otherwise distributed or used without the express written consent of EMSL. Test Report EXMold Printed: 3/07/ :22:54AM Page 24 of 24

53 Appendix E MERCURY SAMPLING RESULTS

54 Client: Washtenaw ISD Building: High Point Location: Various Project Number: CI0333/HP106. Indoor Air Quality Data Sheet Mercury Air Sampling Page: 1 of 1 Date: 03/05/2018 Nova Representative: Huda Zwen Outside Weather Conditions: 29 o Sunny Sample Number Location Pump I.D. Start Time Stop Time Sample Time (min) Start Flow Rate (L/min) Stop Flow Rate (L/min) Volume (L) Notes 01M A-1, near Sink 74 9:09 AM 1:10 PM VF, DC, WC 02M A-5, near Sink 69 9:16 AM 1:16 PM VO, DO, WC 03M A-Centrum 27 9:27 AM 1:27 PM VO, DO, WC

55 TM 2105 Pless Drive Brighton, Michigan Phone (810) Fax (810) March 09, 2018 Nova Environmental. Subject: WISD CI0333/HP106 Dear Ms. Whitton : Thank you for making Brighton Analytical, L.L.C. your laboratory of choice. Attached are the results for the samples submitted on 03/07/2018 for the above mentioned project. NELAP/TNI Accredited Analysis and MDEQ Drinking Water Certified Analysis will be identified in their respective reporting formats. Hard copies can be supplied at your request for a fee of $20.00 per copy. The invoice for this project will be ed separately. If you have any questions concerning the data or invoice, please don't hesitate to contact our office. We welcome your comments and suggestions to improve our quality systems. Please reference Brighton Analytical, L.L.C. Project ID when calling or ing. We thank you for this opportunity to partner with you on this project and hope to work with you again in the future. Sincerely, Brighton Analytical, L.L.C.

56 Sample Date: 3/5/ Submit Date: 3/7/ Report Date: 3/9/2018 Brighton Analytical LLC 2105 Pless Drive Brighton, Michigan Phone: (810) (810) MDNRE Certified #9404 NELAC Accredited # To: Nova Environmental. BA Report Number: Project Name: WISD BA Sample ID: CH01410 Project Number: CI0333/HP106 Sample ID: O1M Parameters Result Units DL Method Reference Analyst Analysis Date Metal Analysis Mercury Not detected ug/m NIOSH 6009 LS 03/08/2018 DL=Reported detection limit for analytical method requested. Some compounds require special analytical methods to achieve MDNR designated target detection limits (TDL). Released by Date 3/9/2018 1

57 Sample Date: 3/5/ Submit Date: 3/7/ Report Date: 3/9/2018 Brighton Analytical LLC 2105 Pless Drive Brighton, Michigan Phone: (810) (810) MDNRE Certified #9404 NELAC Accredited # To: Nova Environmental. BA Report Number: Project Name: WISD BA Sample ID: CH01411 Project Number: CI0333/HP106 Sample ID: O2M Parameters Result Units DL Method Reference Analyst Analysis Date Metal Analysis Mercury Not detected ug/m NIOSH 6009 LS 03/08/2018 DL=Reported detection limit for analytical method requested. Some compounds require special analytical methods to achieve MDNR designated target detection limits (TDL). Released by Date 3/9/2018 1

58 Sample Date: 3/5/ Submit Date: 3/7/ Report Date: 3/9/2018 Brighton Analytical LLC 2105 Pless Drive Brighton, Michigan Phone: (810) (810) MDNRE Certified #9404 NELAC Accredited # To: Nova Environmental. BA Report Number: Project Name: WISD BA Sample ID: CH01412 Project Number: CI0333/HP106 Sample ID: O3M Parameters Result Units DL Method Reference Analyst Analysis Date Metal Analysis Mercury Not detected ug/m NIOSH 6009 LS 03/08/2018 DL=Reported detection limit for analytical method requested. Some compounds require special analytical methods to achieve MDNR designated target detection limits (TDL). Released by Date 3/9/2018 1

59 Sample Date: 3/5/ Submit Date: 3/7/ Report Date: 3/9/2018 Brighton Analytical LLC 2105 Pless Drive Brighton, Michigan Phone: (810) (810) MDNRE Certified #9404 NELAC Accredited # To: Nova Environmental. BA Report Number: Project Name: WISD BA Sample ID: CH01413 Project Number: CI0333/HP106 Sample ID: FB1 Parameters Result Units DL Method Reference Analyst Analysis Date Metal Analysis Mercury Not detected ug/tube 0.05 NIOSH 6009 LS 03/08/2018 DL=Reported detection limit for analytical method requested. Some compounds require special analytical methods to achieve MDNR designated target detection limits (TDL). Released by Date 3/9/2018 1

60 Sample Date: 3/5/ Submit Date: 3/7/ Report Date: 3/9/2018 Brighton Analytical LLC 2105 Pless Drive Brighton, Michigan Phone: (810) (810) MDNRE Certified #9404 NELAC Accredited # To: Nova Environmental. BA Report Number: Project Name: WISD BA Sample ID: CH01414 Project Number: CI0333/HP106 Sample ID: FB2 Parameters Result Units DL Method Reference Analyst Analysis Date Metal Analysis Mercury 1.9 ug/tube 1.8 NIOSH 6009 LS 03/08/2018 DL=Reported detection limit for analytical method requested. Some compounds require special analytical methods to achieve MDNR designated target detection limits (TDL). Elevated dl due to sample matrix. Released by Date 3/9/2018 1

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