1204 North Road (Rt. 117) Groton, Connecticut 06340

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1 FTP Construction A nil 2014 Communications (24 hours): website: aol.com Office: (860) FAX: (860) Toll Free: 1 (800) monoxide, carbon dioxide, respirable particulates, total hydrocarbons (VOCs), temperature and humidity. Enclosure (1) contains the real time ambient summary results for the carbon respirable particulates, total hydrocarbons (VOCs), temperature and humidity were Real time measurements (data logging) for carbon monoxide, carbon dioxide, collected utilizing real time, data logging 3M EVM-7 series units. logging have been recorded and are presented in Enclosure (1). The table displays numerical numbers of the sampling results. of 167 hours (7 days) unless noted on the data summary sheet. The results of the data The data logging equipment were placed in each room and sampled for a period Consultants, Inc. conducted a limited and directed indoor air quality survey at Berlin High School. Sampling was conducted in selected classrooms and offices during on monoxide, ôarbon dioxide, respirable particulates, total hydrocarbons (VOCs), temperature and humidity. As requested, during the week (7 days) of March 24-31, 2014, Mystic Air Quality (real time measurements logged over 167 hours unless noted) were collected for carbon going construction activities inside and outside of the school building. General air data Dear Mr. Cox: Carbon Dioxide, Respirable Particulates, Total Hydrocarbons (VOCs), Temperature, Humidity End: (1) Data Log Results (Avg, Mm, and Max) Summary for Carbon Monoxide, Date of Survey: March 24-31, 2014 Areas Tested: Classrooms 202, 221, Office 236 and Classroom 248 Prep Room Location: Berlin High School, 139 Patterson Way, Berlin, CT Re: Limited and Directed Indoor Air Quality Survey Results Attn: Mr. Allan Cox Farmington, Connecticut Farmington Avenue \gst/ 1204 North Road (Rt. 117) Groton, Connecticut AiR q Mystic Air Qia1ity Conu1tantg, Inc.

2 Carbon Monoxide health and safety standards and/or recommendations. particulates. (ACGIH) recommended Threshold Limit Value (TLV) of 3 mg/rn mg/rn 3 and below the American Conference of Governmental Industrial Hygienists 3 for respirable below the Occupational Safety and Health Administration (OSHA) standard of 5 The respirable particulates for the classrooms and rooms tested where well include respiratory, eye, and skin irritation and asthma. Health effects that have been associated with various types of PM exposure The size of particles is directly linked to their potential for causing health in diameter, inhalable coarse particles, such as those found near roadways and dusty problems. The size of PM in the air ranges from approximately micrometers (rim) concern for respiratory health are: particles between 2.5 micrometers and 10 micrometers industries. to 100.Lm in diameter. The two size categories of particulates that are of particular sources of PM include cars, trucks, construction equipment, coal-fired power plants, and are exposed to PM from both naturally occurring processes and human activities. Major Particulate matter (PM) is a complex mixture of extremely small particles. People human skin flakes, fibers, building materials, tire wear, and diesel soot. wood burning. Common airborne particles in schools include pollens, dust, mold spores, Respirable Particulates per million. standard of 50 ppm and below the American Conference of Governmental Industrial Hygienists (ACGIH) recommended Threshold Limit Value (TLV) of 25 ppm for carbon monoxide. The average of carbon monoxide over the sampling period was 0 parts The real time measurements for carbon monoxide averaged none detected. These levels are well below the Occupational Safety and Health Administration (OSHA) particulates, temperature and total hydrocarbons (VOCs) were below current The data log results indicate that testing for carbon monoxide, respirable

3 within the detector as a source of energy used to remove an electron from the neutrally Photoionization detectors use high-energy ultraviolet light from a lamp housed proportional to the concentration of contaminant. the charged particles on charged plates. This produces a flow of electrical current charged target molecules. The electrically charged fragments are called ions. PIDs collect general dehydration. and the body feels colder. Can cause respiratory ailments as asthma, bronchitis, sinusitis, nosebleeds or Skin moisture evaporation can cause skin irritations and eye itching. Irritative effects such as static electricity that can cause mild shocks are common. The apparent temperature of the air is lower than what the thermometer indicates, Studies on low humidity have shown four main effects on the human body. They include the following: during the winter months. If building occupants experience dryness of the mucous systems are not recommended since they are known source for microbial growth and if not maintained meticulously can pose a serious problem. Low humidity levels will be the norm outside and inside the school building membranes it is recommended that they increase their water intake. Humidification recommended AS}{RAE criteria of 30-60%. The relative humidity measurements in the areas tested were below the Relative Humidity (VOC5) detected on the meters were <1 ppm. of vapor. At the time of the sampling the average quantity of total hydrocarbons in the concentration of diesel and other VOC vapors in the area being monitored, and PIDs provide real-time, dynamic readings that are able to capture sudden changes which can easily be used to track down hot spots or localizations in the concentration diesel. 15 ppm TLV for diesel. Most PIDs are capable of providing 0.3 ppm resolution for Photoioni.zation detectors are easily able to provide readings at or below the new characteristics of the catalytic hot bead-type combustible sensor. The amount of energy needed to remove an electron from the target molecule is called the ionization potential for that substance. The larger the molecule, or the more double or triple bonds the molecule contains, the lower the IP. Thus, in general, the larger the molecule, the easier it is to detect! This is exactly the opposite of the performance Total Hydrocarbons (VOCs)

4 Fahrenheit during the cool months and 75.0 does not pose a health issue. Temperature is based primarily on the comfort of the occupant(s). temperature outside the ASHRAE recommendation may occur in the building it 82.0 degrees during the warm months. While The temperature readings should be maintained between Outdoor fresh air ventilation is important because it can dilute contaminants that are produced in the indoor environment, such as odors released from people and contaminants released from the building, equipment, furnishings, and people s activities. Adequate ventilation can limit the buildup of these contaminants. It is these other contaminants and not usually the carbon dioxide that may lead to indoor air quality problems, such as discomfort, odors, stuffiness and possibly health symptoms. ASHRAE has developed ventilation guidelines that should maintain a comfortable environment for most occupants. Using carbon dioxide as the primary indicator of bioeffluents does not eliminate additional fresh air if available or possible. recommended level it is recommended that more fresh air be delivered to the space through the opening of windows or increasing the ventilation system to allow for the need for consideration of other contaminants. For areas that exceeded the the carbon dioxide. At the time of the sampling the carbon dioxide levels in all the Human occupants, water vapor and contaminants produce carbon dioxide. The more human occupants you have with minimal dilution ventilation typically the higher The American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. classrooms were below the Occupational Safety and Health Administration (OSHA), Permissible Exposure Limit (PEL) of 5,000 parts per million (ppm) for carbon dioxide. (ASHRAE) recommended comfort level of 700 ppm above outside air. Carbon dioxide levels no greater than 700 ppm above outside indicated comfort (odor) criteria related to human bioeffluents are likely to be satisfied. Carbon Dioxide Temperature

5 symptoms. result of insufficient ventilation. At high levels, the carbon dioxide itself can cause headache, dizziness, nausea, fatigue, eye symptoms, nasal symptoms and respiratory tract David Wiseman, MS, CIAQP, CL&QC, CIEC Compliance and Inspection Services directly. If you have any questions or concerns please do not hesitate to contact me Occupants may experience health effects in buildings where C02 is elevated, but the symptoms are usually due to the other contaminants in the air that also build up as a

6 Enclosure (1) Direct Reading Results Summary

7 Mystic Air Quality Consultants, Inc North Road, Groton, Connecticut (860) AMBIENTAIR SAMPLE RESULTS Dates: March 24-31, 2014 Location Tested/Serial # Date of Carbon Carbon Respirable VOCs Temperature Humidity Notes Testing Monoxide Dioxide Particulates ppm F % ppm ppm mg/rn Classroom 202 3/24 Miii: 0 Mm: 424 Mm: Miii: 0 Miii: 64.2 Miii: 12.5 (EMN 10025) 3/31/14 Max: 0 Max: 2024 Max: Max:2.5 Max: 76.0 Max: Avg: 0 Avg: 720 Avg: Avg: 0 Avg: 70.7 Avg: 13.7 Classroom 221 3/24 Miii: 0 Miii: 329 Miii: Miii: 0 Miii: 67.1 Miii: 7.8 (EMN 20001) 3/31/14 Max: 0 Max: 617 Max: Max: 0 Max: 78.3 Max: 34.6 Avg: 0 Avg: 525 Avg: Avg: 0 Avg: 73.7 Avg: 19.6 Classroom 248 Prep 3/24 Miii: 0 Mm: 414 Miii: Miii: 0 Miii: 62.4 Mlii: 16.5 (EMK 60018) 3/31/14 Max: 0 Max: 656 Max: Max: 0 Max: 80.6 Max: 47.0 Avg: 0 Avg: 462 Avg: Avg: 0 Avg: 70.4 Avg: 24.3 Classroom 236 3/24 Mm: 0 Mm: 420 Miii: Miii: 0 Miii: 68.8 Mm: 10.9 (EMN 10009) 3/31/14 Max: 0 Max: 786 Max: Max:1.8 Max: 76.5 Max: 33.1 Avg: 0 Avg: 492 Avg: Avg: 0 Avg: 74.9 Avg: ppm 5,000 ppm 5.0 mg/m Various % Standards! OSHA OSHA OSHA ppm Cool Season ASHRAE Recommendations OSHA ppm mg/rn Warm ACGIH outside ACGIH Season ACGIH ARHRAE 3 3 Enclosure (1) Page 1 of 1