Indoor Air Quality Assessment Morell Consolidated School Morell, PEI

Transcription

1 Project No Indoor Air Quality Assessment Morell Consolidated School Morell, PEI Prepared for: PEI Dept. Transportation & Infrastructure Renewal P.O. Box 2000 Charlottetown, PE C1A 7N7 Attention: Regan MacLellan January 30, 2012 ALL-TECH Environmental Services Ltd. 92 Queen Street, Suite 201 Charlottetown, PE C1A 4B1

2 EXECUTIVE SUMMARY ALL-TECH Environmental Services Limited was contracted by PEI Department of Transportation & Infrastructure Renewal (TIR) to conduct an Indoor Air Quality (IAQ) assessment at the Morell Consolidated School located in Morell, Prince Edward Island. The purpose of the Indoor Air Quality monitoring was to identify any general issues associated with indoor air quality and compare to the industry standards and guidelines. The test parameters for this assessment included the following: Thermal Comfort (Temperature & Relative Humidity) Air Freshness (Carbon Dioxide & Carbon Monoxide) Airborne Microbials Airborne Particulates (not otherwise specified) TVOC s The IAQ monitoring was carried out on January 12 th, The following is a summary of the findings for this report: Thermal Comfort Parameters Optimum levels for Relative Humidity thermal comfort during the heating season is 50%. It is suggested that Relative Humidity should be greater than 30%. Relative humidity readings recorded for the test areas ranged from %. Based on relative humidity readings in the test areas, worker comfort range is considered to be below acceptable guidelines for winter heating months. It should be noted that at the time of testing temperatures were higher as well to allow for faster drying of floor waxing. Follow up testing should be conducted during normal operating conditions and after occupancy to ensure comfort levels are achieved. Temperature readings recorded for the test areas ranged from C. Based on temperature readings in the test areas, comfort range would be considered acceptable for winter heating months based on current guidelines. Air Quality Parameters Carbon Dioxide Levels Average carbon dioxide concentrations recorded during the monitoring period ranged from ppm. The overall average for all test locations was 465 ppm. ASHRAE guidelines are established for ventilated buildings to evaluate comfort levels. The present ASHRAE comfort guideline is set at 1000 ppm. During the time of testing the classroom spaces were not occupied. It is recommended to conduct follow up testing during normal operating conditions and after occupancy to ensure comfort levels are achieved. Carbon Monoxide Levels ALL-TECH Environmental Services Ltd.

3 Carbon monoxide concentrations were not a factor during the monitoring period. Low levels of carbon monoxide were detected but not a significant factor during the sampling period. Airborne Microbial Parameters Given the time of year in which the sampling was conducted, (i.e. January) strict comparison between indoor and outdoor levels may not be applicable. During such periods comparison between interior locations (and in particular concern vs. control locations) may offer a better evaluation of conditions. Interior control sample indicate similar species at low concentrations (only a few individual species identified). At the time of the testing, no visible mould, water stained areas or moisture was observed. Therefore, based on test results and observations, there is no immediate concern regarding a potential indoor mould amplifier. The interpretation of results provided, is a general summary of current knowledge and industry practice regarding mould assessment and interpretation of air sampling results. Airborne Particulates (not otherwise specified) Particulates levels recorded in the test areas ranged from mg/m 3. Based on sample results at the time of monitoring, these values are considered below the acceptable Health Canada guidelines of 0.15 mg/m 3 for non industrial settings for a 24 hour period. TVOC s All areas tested were found to have normal background levels of TVOC s and were reported as < 100 ppb in each location which should be considered acceptable. This summary should not be used alone. The report must be read in its entirety. Larry G. Koughan, CET, CRSP Branch Manager / Senior Project Consultant ALL-TECH Environmental Services Ltd.

4 TABLE OF CONTENTS 1.0 INTRODUCTION Indoor Air Quality Assessment EXPOSURE CRITERIA Indoor Air Quality Parameters (IAQ) Airborne Microbial Guidelines Airborne Particulates (not otherwise specified) Total Volatile Organic Compounds (TVOC s) ASSESSMENT METHODOLOGY IAQ Assessment Thermal Comfort Parameters - Air Quality Parameters 3.2 Airborne Microbial Testing Airborne Particulates (not otherwise specified) Total Volatile Organic Compounds (TVOC s) ASSESSMENT FINDINGS Air Monitoring Results Thermal Comfort Parameters - Air Quality Parameters 4.2 Airborne Microbial Testing CONCLUSIONS AND RECOMMENDATIONS IAQ Assessment Thermal Comfort Parameters - Air Quality Parameters 5.2 Airborne Microbial Testing Airborne Particulates (not otherwise specified) Total Volatile Organic Compounds (TVOC s) LIMITATIONS CLOSURE APPENDIX 1 - APPENDIX 2 - Laboratory Analysis Report Airborne Viable Mould Sampling Site Drawing with sample locations ALL-TECH Environmental Services Ltd.

5 1.0 INTRODUCTION ALL-TECH Environmental Services Limited was contracted by PEI Department of Transportation & Infrastructure Renewal (TIR) to conduct an Indoor Air Quality (IAQ) assessment at the Morell Consolidated School located in Morell, Prince Edward Island. The purpose of the Indoor Air Quality monitoring was to identify any general issues associated with indoor air quality and compare to the industry standards and guidelines. The test parameters for this assessment included the following: Thermal Comfort (Temperature & Relative Humidity) Air Freshness (Carbon Dioxide & Carbon Monoxide) Airborne Microbials Airborne Particulates (not otherwise specified) TVOC s The IAQ monitoring was carried out on January 12 th, Indoor Air Quality Assessment Major problems identified in indoor air quality investigations can be placed into three general categories listed with generally decreasing frequency: inadequate ventilation, chemical contamination, and microbiological contamination. Inadequate ventilation is the single most common contributing cause for IAQ complaints. Generally, ventilation problems allow contaminant build-up in occupied spaces to a level that is considered annoying or uncomfortable for some building occupants. Adverse health effects may result for the more sensitive occupants. An indoor air quality (IAQ) assessment is a qualitative and quantitative study of a building s structure, function and occupancy that affect the nature of the air within the building. The goal of an indoor air quality assessment is to identify any source of indoor air quality complaints. Recommendations are then made to rectify the problem so that it does not reoccur or create other building related problems. General IAQ parameters, which are commonly tested and assess during an Indoor Air Quality assessments are: 1

6 Carbon dioxide: CO 2 is an odourless and colourless gas. It is a normal constituent of the atmosphere at ppm. Some sources of CO 2 in an indoor environment are human respiration and combustion of fossil fuels (e.g. gas & oil furnaces, automobile exhaust, etc). CO 2 generally indicates air freshness during an IAQ assessment. In ventilated buildings CO 2 measurements assess the effectiveness of the HVAC system (are proper air exchanges occurring). Increased carbon dioxide levels in an indoor environment may cause headaches, tiredness, and stuffiness, thus decreasing the employees productivity. Carbon monoxide: CO is an odourless, colourless, and toxic gas which is produced by the incomplete combustion of fossil fuels. Sources of CO in an indoor environment are vehicle exhaust from parking lots/garages and loading docks. Also, tobacco smoke can be another source of CO in an indoor environment. CO is an extremely toxic gas, it combines with haemoglobin in the blood which reduces the blood s ability to carry oxygen. Some common complaints of elevated CO levels are headaches, nausea, dizziness, and tiredness. It can be fatal at very high concentrations. Temperature/RH%: Temperature and relative humidity (RH%) are two of several factors affecting thermal comfort gradients. The present guidelines are intended to achieve thermal conditions that at least 80% of the occupants would find acceptable or comfortable. Low relative humidity can cause dry, chapped skin, and affect mucous membranes in the nose and throat. High humidity may result in condensation forming walls and surfaces within a building causing a potential increase in mould and fungi growth, which is detrimental to IAQ within the building. Volatile organic compounds (VOCs): Sources include photocopy machines, computer printers, computers, new carpets and furnishings, cleaning materials, paints, adhesives, etc. 2

7 Moulds and Fungus: Contamination of indoor air quality by micro-organisms is a concern due to the fact that certain mould/fungi and their mycotoxins in a building can cause discomfort and produce health related symptoms for building occupants. These health effects can be non-allergenic complaints such as headaches, sore throats, fatigue, coughing, and flu-like symptoms. Most of these symptoms can be amplified in young children, the elderly, and immunocompromised persons. Toxins released by moulds can affect a person s respiratory system, particularly the lungs. The lungs have defence cells, which act like a lung surfactant. These cells attack foreign micro-organism which enter the lungs through breathing. Toxins produce by moulds affect these defence cells thus make a person susceptible to other airborne micro-organisms. Fungi/mould need damp, moist conditions to survive. Moisture inside buildings can readily accumulate from water leaks, flooding. Condensation build up on windows, exterior walls, uninsulated pipes, and humidification/dehumidification systems is another source of moisture inside buildings. Persistent incidents of these problems or a one time occurrence (i.e. flooding, condensation, major water leaks) can lead to the establishment of a microbial amplifier inside the building. 2.0 EXPOSURE CRITERIA Indoor air pollutants in commercial buildings and non-industrial workplaces at the present time in Prince Edward Island are regulated under Part 11 Ventilation, section Regulations are adopted from the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLV s). These TLV s are used as standards to ensure overall employee health and safety. Should TLV s be exceeded, employers are required to ensure suitable ventilation is provided to reduce contamination in the workplace. 2.1 Indoor Air Quality Parameters Table 1 presents the values from the CSA International's Standard CAN/CSA Z "Office Ergonomics" which gives temperature and relative humidity requirements for 3

8 offices in Canada. These values are based on the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) Standard "Thermal Environmental Conditions for Human Occupancy". These values are designed to meet the needs of 80% of individuals, which means a few people will feel uncomfortable even if these values are met. Additional measures may be required. ASHRAE Standard 55 recommends a range of temperature and humidity values for thermal comfort in office work. Table 1 Temperature and Humidity of an Office Environment CSA Z Heating Season Cooling Season Temperature C 68-75F 23-26C 73-79F % Relative Humidity 50% 50% ASHRAE recommends that relative humidity be maintained below 60%. There is no recommended lower level of humidity for achieving thermal comfort, but very low humidity can lead to increased static electricity and health problems, such as skin irritation. The relative humidity should be greater than 30%. Table 2 shows ASHRAE's acceptable ranges of operative temperature (a combination of air and radiant temperatures) for relative humidity levels of 30% and 60%. Table 2 Examples of acceptable operative temperature ranges based on comfort zone diagrams in ASHRAE Standard Conditions Acceptable operative temperatures C F Summer Relative humidity 30% Relative humidity 60% Winter Relative humidity 30% Relative humidity 60%

9 Air Freshness: The generally accepted measurement for air freshness is carbon dioxide (CO 2 ). Carbon dioxide is a natural component of people s breathing. The content of non-polluted outside air is ppm (parts per million). In indoor air, the CO 2 concentration can be much higher depending on the number of people, level of activity within an area and whether the building is mechanically ventilated. Carbon monoxide is a colourless, odourless gas that arises from incomplete combustion. It is produced primarily through natural sources. Sources from human activity account for about 10% of total worldwide CO production. Important sources of CO emissions are industrial, such as burning fuel to generate electricity or heat. Some typical sources within public buildings are: tobacco smoke, automobile emissions, and back drafting of fossil fuel combustion i.e.: furnaces or space heaters. The current ASHRAE, Ventilation for Acceptable Indoor Air Quality (Standard ) sets a maximum of 1000 ppm for CO 2. ASHRAE ventilation rates were derived to maintain the level of carbon dioxide below 1,000 ppm and to control contaminants. This guideline is not based on health risk, but on human comfort. The comfort level is considered the acceptable level for an average person, which ASHRAE defines as the point at which 80% of the population is comfortable. The ASHRAE Standard for carbon monoxide sets an upper limit of 9 ppm for CO, but current recommendations set levels at less than 4 ppm. Most office areas and facilities operate within the latter guidelines. Table 3 ASHRAE S Indoor Air Quality Guidelines Parameter ASHRAE Guideline (ppm) Carbon Dioxide 1000 Carbon Monoxide Airborne Microbial Guidelines Air sampling for mould spores can be useful in determining whether there are hidden mould amplification sites within a building. Air sampling can also assist in evaluating the degree to which the presence of hidden or known mould amplification sites are 5

10 impacting on the quality of air within the locations sampled. However, air sampling for mould spores should not be used as a sole assessment tool to determine health risks to building occupants. This is due to the numerous limitations associated with air sampling for mould, the lack of a clear dose-response relationship for airborne spore exposure and the wide range of susceptibility for exposed persons. No scientifically validated airborne spore concentrations have been established that would indicate a health risk to building occupants and therefore no regulated exposure limits for airborne mould exposure currently exist. Given the lack of adequate scientific data to establish airborne spore exposure limits, currently recommended practice for proper interpretation of air sampling results is to perform comparison analysis. If air sampling is performed due to concern regarding potential exposure in a particular room or area of a building, samples should generally be taken in the area of concern, in an area of no concern (i.e., a non-complaint or nonaffected area) and outside the building as a minimum. Analytical results are then compared to one another with respect to indoor and outdoor biodiversity. Generally, in an area not affected by mould contamination, one would expect to see the same type of mould spores present inside at a similar rank order but lower concentration (especially for mechanically ventilated buildings) as detected in outdoor air. Mould types that dominate samples retrieved from the area of concern but are not dominant or not detected in indoor and/or outdoor control samples provides indication that an interior mould amplification site likely exists and that air quality is degraded. Under these conditions, further assessment of the areas of concern would be recommended in order to determine if an indoor mould contamination site exists and the appropriate remedial measures required, if necessary. 2.3 Airborne Particulates (not otherwise specified) Health Canada has developed guidelines for airborne particulate in their publication Indoor Air Quality in Office Buildings: A Technical Guide. Section in this guide describes particulates as: Solid or liquid matter with aerodynamic diameters ranging from to 100 µm (micrometers). Dusts, fumes, smoke, and organisms such as viruses, pollen grains, bacteria, and fungal spores are solid particulate matter, whereas mists and fog are liquid particulate matter. The size range of concern to human health and IAQ is µm. The nose will filter particles smaller than 0.1 µm are generally exhaled, and most particles above 10 µm. Particulates are classified as total suspended particulates (TSP) or respirable suspended particulates (RSP), which consist of those with particle, size less than 10 6

11 µm. Small particles that reach the thoracic or lower regions of the respiratory track are responsible for most of the adverse health effects, and guidelines have been developed for those particles 10 µm or smaller (PM 10 ). ASHRAE Standard has adopted the U.S. Environmental Protection Agency PM 10 standard of 50 µg/m 3 for annual exposure and 150 µg/m 3 for 24-hour exposure. In office buildings, the average particulate concentration found in a non-smoking environment is 10 µg/m 3. The Occupational Environment Its Evaluation and Control, a publication of the American Industrial Hygiene Association (AIHA) states the following: In non-industrial occupational environments, the principal sources of fine particle aerosols are cigarette smoke and possibly aerosols from spray air fresheners or cleaning materials. Larger particle aerosols include carpet fragments, dirt carried in from outdoors, and most of the biological particle fraction of the air. Outdoor air could also be a significant source for fine particles in naturally ventilated buildings. Table 4 Health Canada Guidelines - Airborne Particulates Parameter Units (mg/m 3 ) Airborne Particulates (Indoor non industrial) 0.05 mg/m 3 annual exposure 0.15 mg/m 3 for 24-hour exposure 2.4 Total Volatile Organic Compounds The ACGIH does not have guidelines for TVOC s, nor are there any present Canadian or US standards for TVOC. However, global consensus has resulted in the emergence of preliminary guidelines for TVOC standards for Indoor Air Quality (IAQ). Depending on the location (home, school, hospital, etc), recommended levels range from 100 to 650 parts per billion (ppb). By all accounts, the IAQ TVOC threshold for normal environments should not exceed 1000 ppb. Field experience suggests the following guide for the use of Photoionization Detectors (PIDs) to assess indoor environments: < 100 ppb normal outdoor air ppb normal indoor air > 500 ppb indicates potential of IAQ contaminants > 1000 ppb further investigation 7

12 Due to the complexity of TVOC s in the workplace, TVOC s have been evaluated as a screening measure and investigation tool. 3.0 ASSESSMENT METHODOLOGY The scope of work for the IAQ assessment included testing for the following air quality contaminants: a) Thermal Comfort (Temperature & Relative Humidity) b) Air Freshness (Carbon Dioxide - CO 2 & Carbon Monoxide CO) c) Airborne Microbials d) Airborne Particulates (not otherwise specified) e) TVOC s Methodology for each parameter tested is addressed under their respective headings in this section. 3.1 IAQ Monitoring Short term grab samples for approximately 10 minutes were collected from a central area of each noted area of the building. IAQ measurements were collected using TSI Q- Trak monitor and results downloaded to compare interior IAQ parameters with the acceptable IAQ guidelines established by ASHRAE and CSA Standards. Thermal Comfort Parameters Relative humidity measurements were taken using TSI Q-Trak Monitor with datalogging capabilities. The instrument uses a thermistor sensor to measure temperature with an operating range of 0 to 50 0 C (32 to F) and ±0.6 0 C (1 0 F) accuracy. Relative humidity was measured using a thin-film capacitive sensor with an operating range of 5 to 95% and ±3% accuracy. Air Quality Parameters CO 2 concentrations were also obtained with the TSI Q-Trak Monitor with data-logging capabilities. CO 2 levels were determined using a non-dispersive infrared sensor which measures CO 2 gas from 0 to 4,000 ppm at an accuracy of ±5% of reading ±50 ppm at 25 0 C (77 0 F). CO concentrations were determined using an on board sensor which measures CO gas from 0-50 ppm at an accuracy of %. 8

13 3.2 Airborne Microbial Testing A total of six (6) samples were collected for identification of viable airborne mould throughout randomly selected locations within the school. A portable Biotest RCS (Reuter Centrifugal Sampler) air sampler was used to collect 4 minute (160L) samples. The RCS sampler was sterilized before each test using isopropyl alcohol swabs. The technician wore latex gloves when handling the agar strips. Once the samples were collected, the strips were sealed into their original packages. The RCS works on impaction. Airborne microorganisms are collected onto agar (culture medium) strips. After the samples were taken, the agar strips were placed in a cooler and shipped to an independent laboratory. Once at the laboratory, the agar strips were incubated for 10 days and colonies and species were identified. The agar strips used were Agar Strips YM (Art.-No ) with Rosa Bengal and Streptomycin. 3.3 Airborne Particulates (not otherwise specified) Sample measurements of airborne particle concentrations were made using a TSI Model 8520 Dust Trak aerosol Monitor with data logging capabilities. The monitor measures concentrations of particles between 0.1 and 10 µm in diameter, within a range of 10 µg/m 3 to 100 mg/m 3. The logging interval for the TSI Q-Trak Monitor was set at one (1) minute intervals. This means the monitor is logging an average of the airborne particulate concentrations measured over each 1 minute sampling period. Long term sampling (approx 24 hr) within locations # 1, 3, 8 and 12 at the Morell Consolidated School was recorded at an average of mg/m 3. (as per site drawing Appendix 3). Measurements from the monitor were down loaded and summary report generated the equipment data software package (Trak Pro). 3.4 TVOC s Measurements of TVOC s were made using an ION Science Pho Check+ Photoionization Detector (PID). The sample flow rate with the probe attached is 220 cc/ minute. For the purpose of the testing, the detection range was set at ppb. The accuracy of the unit is listed as +/- 5% of the displayed reading. 9

14 Measurements performed using this sampling methodology is non-specific in nature and was only used as a screening tool to evaluate the potential for different work stations/activities to generate airborne concentrations of TVOCs. TVOC measurements were taken from the Morell Consolidated School. Short term grab samples were collected in each of the noted areas over approximately a ten minute period and average concentrations were recorded based on conditions from January 12 th ASSESSMENT FINDINGS 4.1 Air Monitoring Results Short term grab samples were collected for approximately 10 minutes in fifteen (15) locations throughout the school for general indoor air quality parameters including: Relative Humidity; Temperature; Carbon Dioxide; Carbon Monoxide and TVOC s. All sample locations were documented and test results recorded for each location upon completion of the testing. Trak pro data summary report for long term airborne particulate results can be found in Appendix 2. A summary of results for all noted parameters are listed below in Table 5. Table 5 IAQ Sample Results Room No. / Description CO 2 (ppm) CO (ppm) R.H. (%) Temp C Particulates (mg/m 3 ) TVOC s (ppb) 2 nd Level < 100 Location #1 2 nd Level < 100 Location #2 2 nd Level < 100 Location #3 2 nd Level < 100 Location #4 2 nd Level < 100 Location #5 2 nd Level <

15 Location #6 2 nd Level Location #7 2 nd Level Location #8 2 nd Level Location #9 1 st Level Location# 10 1 st Level Location# 11 1 st Level Location# 12 1 st Level Location# 13 1 st Level Location# 14 1 st Level Location# < < < < < < < < < Airborne Microbial Results A total of six (6) samples were collected for identification of viable airborne mould throughout randomly selected locations within the school. A portable Biotest RCS (Reuter Centrifugal Sampler) air sampler was used to collect 4 minute (160L) samples. The RCS sampler was sterilized before each test using isopropyl alcohol swabs. The technician wore latex gloves when handling the agar strips. Once the samples were collected, the strips were sealed into their original packages. The RCS works on impaction. Airborne microorganisms are collected onto agar (culture medium) strips. After the samples were taken, the agar strips were placed in a cooler and shipped to an independent laboratory. Once at the laboratory, the agar strips were incubated for 10 days and colonies and species were identified. The agar strips used were Agar Strips YM (Art.-No ) with Rosa Bengal and Streptomycin. 11

16 It should be noted that generally an outdoor sample is collected for comparison of species and total concentrations. However, outdoor concentrations during the wintertime are often significantly reduced and therefore may not serve as a valid comparison to evaluate conditions during snow cover. Therefore, indoor comparisons are taken to assist in evaluating conditions. Sample results for non viable mould concentrations have been summarized below in Table 6. Table 6 Summary of Viable Airborne Mould Results Sample ID Sample Date Sample Location Sample Results (Total CFU/m 3 ) V-1 Jan. 12/12 Location #1 2 nd level 19 (as per drawing Appendix 3) V-2 Jan. 12/12 Location #5 2 nd level 0 (as per drawing Appendix 3) V-3 Jan. 12/12 Location #7 2 nd level 6 (as per drawing Appendix 3) V-4 Jan. 12/12 Location #16 1 st level corridor 56 (as per drawing Appendix 3) V-5 Jan. 12/12 Location #13 1 st level 0 (as per drawing Appendix 3) V-6 Jan. 12/12 Location #15 1 st level (as per drawing Appendix 3) 6 CFU Colony Forming Unit 5.0 CONCLUSIONS AND RECOMMENDATIONS 5.1 IAQ Assessment Thermal Comfort Parameters Optimum levels for Relative Humidity thermal comfort during the heating season is 50%. It is suggested that Relative Humidity should be greater than 30%. Relative humidity readings recorded for the test areas ranged from %. Based on relative humidity readings in the test areas, worker comfort range is considered to be below acceptable guidelines for winter heating months. It should be noted that at the time of testing temperatures were higher as well to allow for faster drying of floor waxing. Follow up testing should be conducted during normal operating conditions and after occupancy to ensure comfort levels are achieved. 12

17 Temperature readings recorded for the test areas ranged from C. Based on temperature readings in the test areas, comfort range would be considered acceptable for winter heating months based on current guidelines. Air Quality Parameters Carbon Dioxide Levels Average carbon dioxide concentrations recorded during the monitoring period ranged from ppm. The overall average for all test locations was 465 ppm. ASHRAE guidelines are established for ventilated buildings to evaluate comfort levels. The present ASHRAE comfort guideline is set at 1000 ppm. During the time of testing the classroom spaces were not occupied. It is recommended to conduct follow up testing during normal operating conditions and after occupancy to ensure comfort levels are achieved. Carbon Monoxide Levels Carbon monoxide concentrations were not a factor during the monitoring period. Low levels of carbon monoxide were detected but not a significant factor during the sampling period. 5.2 Airborne Microbial Parameters Given the time of year in which the sampling was conducted, (i.e. January) strict comparison between indoor and outdoor levels may not be applicable. During such periods comparison between interior locations (and in particular concern vs. control locations) may offer a better evaluation of conditions. Interior control sample indicate similar species at low concentrations (only a few individual species identified). At the time of the testing, no visible mould, water stained areas or moisture was observed. Therefore, based on test results and observations, there is no immediate concern regarding a potential indoor mould amplifier. The interpretation of results provided, is a general summary of current knowledge and industry practice regarding mould assessment and interpretation of air sampling results. 13

18 5.3 Airborne Particulates (not otherwise specified) Particulates levels recorded in the test areas ranged from mg/m 3. Based on sample results at the time of monitoring, these values are considered below the acceptable Health Canada guidelines of 0.15 mg/m 3 for non industrial settings for a 24 hour period. 5.4 TVOC s All areas tested were found to have normal background levels of TVOC s and were reported as < 100 ppb in each location which should be considered acceptable. 6.0 LIMITATIONS The findings contained in this report are based upon conditions as they were observed at the time of the survey. No assurance is made regarding changes in conditions subsequent to the time of the survey. A change in process operations such as materials used, work procedures and engineering controls can have a major impact on the type and concentration of airborne contaminants present. The American Conference of Governmental Industrial Hygienists (ACGIH) values listed in this report are intended for use in the practice of industrial hygiene as guidelines or recommendations to assist in the control of potential workplace health hazards and for no other use (ACGIH, 2011 TLVs and BEIs ). This report was prepared by ALL-TECH Environmental Services Limited for the sole benefit of our client PEI Department of Transportation & Infrastructure Renewal. The documentation in the report is based on information provided or obtained by ALL-TECH. The report is based on ALL-TECH s best judgment of the information provided at the time of the assessment. Any use of this report by a third party, is the responsibility of that third party. ALL-TECH accepts no liability and/or damages occurred by any third party which uses information obtained in this report. 14

19 7.0 CLOSURE We trust this assessment and report meet your industrial hygiene requirements Should you have any questions or concerns please contact the undersigned directly. Thank you, Larry Koughan, CET, CRSP Branch Manager / Senior Environmental Consultant ALL-TECH Environmental Services Limited 15

20 APPENDIX 1 Laboratory Analysis Report Airborne Viable Mould Sampling

21 Laboratory Analysis Report To: Larry Koughan EMC LAB REPORT NUMBER: ALL-TECH Environmental Job/Project Name: Morell Consolidated School 92 Queen Street, Suite 201 Job/Project No: No. of Samples: 6 Charlottetown, Prince Edward Island Sample Type: RCS Date Received: Jan 13/12 C1A 4B1 Analysis Method(s): Quantification and Identification to Species Date Analyzed: Jan 26/12 Date Reported: Jan 26/12 Analyst: Fajun Chen, Ph.D., Principal Mycologist Client's Sample ID V-01 V-02 V-03 V-04 V-05 EMC Lab Sample No Sampling Date Jan 12/12 Jan 12/12 Jan 12/12 Jan 12/12 Jan 12/12 Description/Location 2nd level 2nd level 2nd level 1st level corridor 1st level location #1 location #5 location #7 location #16 location #13 Air Volume (m 3 ) Fungal Name Cladosporium cladosporioides Penicillium chrysogenum Penicillium corylophilum Penicilium sp CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 Yeasts Non-sporulating isolates Number of CFU/sample Detection Limit (CFU/M 3 ) TOTAL CFU/M Note: 1. CFU = Colony Forming Unit 2. Non-sporulating isolates are those failing to produce spores when identification is performed. 3. These results are only related to the sample(s) analyzed. 6 <6 EMC Scientific Inc Ambler Drive, Suite 100, Mississauga, ON L4W 4J4 Tel , Fax AIHA EMPAT Participant (Lab ID# ) Page 1 of 2

22 Laboratory Analysis Report EMC LAB REPORT NUMBER: Client's Job/Project No.: Analyst: Fajun Chen, Ph.D., Principal Mycologist Client's Sample ID V-06 EMC Lab Sample No Sampling Date Jan 12/12 Description/Location 1st level location #15 Air Volume (m 3 ) Fungal Name Cladosporium cladosporioides Penicillium chrysogenum Penicillium corylophilum Penicilium sp CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 CFU % CFU/m 3 Yeasts Non-sporulating isolates Number of CFU/sample 1 Detection Limit (CFU/M 3 ) 6 TOTAL CFU/M 3 6 Note: 1. CFU = Colony Forming Unit 2. Non-sporulating isolates are those failing to produce spores when identification is performed. 3. These results are only related to the sample(s) analyzed. EMC Scientific Inc Ambler Drive, Suite 100, Mississauga, ON L4W 4J4 Tel , Fax AIHA EMPAT Participant (Lab ID# ) Page 2 of 2

23 APPENDIX 2 Site Drawing with sample locations

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