INDOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL, 2100 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO

Transcription

1 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO Prepared for Mr. Chris Potts UPPER ARLINGTON SCHOOLS 950 North Mallway Drive Upper Arlington, Ohio 4322 Prepared by HELIX ENVIRONMENTAL, INC. Elizabeth Place, Suite 60H Dayton, Ohio 4547 (937) R. A. Froehlich,CIH, CSP, QEP President Site Visits: December 9 and 20, 207 Report Date: January 5, 208 Helix 6686

2 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE OF CONTENTS EXECUTIVE SUMMARY.... BACKGROU.... SAMPLING A ANALYTICAL PROCEDURES.... APPLICABLE STAARDS.... ANALYTICAL RESULTS.... DISCUSSION A RECOMMEATIONS... APPEICES... i

3 . EXECUTIVE SUMMARY IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 In December 207, Helix Environmental, Inc. performed indoor air quality testing in the Jones Middle School at 200 Arlington Avenue, Upper Arlington, Ohio. The testing was requested to determine if significant concentrations of air contaminants were present in the building following reports of staff concerns. The results of air testing on December 9 and 20, 207 are detailed in a this report, including visual observations to identify potential indoor air quality factors associated with air quality-related disease, monitoring and analytical procedures, and analytical laboratory reports, discussion of results and recommendations for consideration. In summary, no significant concentrations of air contaminants were detected in the building. While Helix Environmental, Inc. cannot comment on air contaminants outside the scope of this report, the concentrations of measured air contaminants reported for this building are well below applicable occupational exposure limits or recommendations. On December 9 and 20, 207, realtime air monitoring documented that indoor VOC levels ranged from less than 0.00 to 0.4 ppm, while the outdoor concentration was less than 0. ppm. Total VOCs were only detected in Third Floor Music Room 34. Total VOC concentrations were well below the OSHA PEL of 500 ppm for Total VOCs as petroleum distillates. Carbon monoxide concentrations at inside locations ranged from nondetectable to 2.6 ppm while outdoor concentrations remained at nondetectable concentrations. Carbon monoxide concentrations at measurement locations were well below the OSHA PEL of 50 ppm, the ACGIH TLV of 25 ppm and the NIOSH REL of 35 ppm on both measurement days. Carbon dioxide concentrations inside of the school ranged from 570 to 354 ppm. The measured levels were greater than the average concentration of ppm measured outside of Jones Middle School, though they were well below the OSHA Permissible Exposure Limit of 5,000 ppm, the ACGIH TLV of 5,000 ppm or the NIOSH REL of 5,000 ppm. Carbon dioxide concentrations above the OSHA Indoor Air Quality recommendation of 000 ppm were measured in only ten locations. On both monitoring days, air temperature levels at inside measurement locations ranged from 5.8 to 75.0 F, with relative humidity levels from 25.4 to 6.2% RH. Air temperatures and relative humidity measurements were within the comfort zone recommended by the American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE). Outside of the building, the air temperature averaged 58.7 F, with average relative humidity levels of 38.9% RH. Several Volatile Organic Compound (VOC) vapors were found at detectable concentrations in the building using SUMMA canister testing, but at Total VOC concentrations less than 0.30 ppm. The exposure levels were well below all applicable OSHA occupational exposure limits, Other VOCs were less than the analytical limit of detection at ppm (0. ppb). In comparison, only acetone and chloromethane were detected in the outdoor sample, at a total VOC concentration of only ppm.

4 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 During the indoor air quality measurements, extensive water intrusion was observed in the basement which has apparently existed for some time. At one location mineral deposits similar to a stalagmite were visible. Water intrusions can supply the moisture that microorganisms require for growth, and visible microbial growths were apparent at several locations. Correction of water intrusions is recommended to ensure that indoor air quality is not affected by microbial growth. Although concentrations of measured air contaminants were well below OSHA Permissible Exposure Limits or other applicable recommendations, additional exposure monitoring is recommended when an investigation into air quality complaints indicates that indoor air quality issues may be present. Based on the air monitoring results, Helix Environmental, Inc. recommends that:. Make air sampling measurement results available to all sampled and affected employees. Air monitoring information can be presented verbally, in employee meetings, in writing, or by posting of notification letters, and should include all pertinent information from the analytical results tables. This air monitoring information should also be maintained in company record keeping systems, to allow its retrieval as needed. 2. Evaluate the ventilation systems serving the rooms where carbon dioxide concentrations were found to be above 000 ppm to ensure that their outdoor air supply is adequate. Properly-adjusted air handlers should be able to supply the required amounts of outdoor air to all supplied rooms. Where problems are identified, they should be corrected immediately. If improvements are identified, they should be considered as soon as possible. 3. Consider additional air monitoring when an investigation into air quality complaints indicate that indoor air quality issued may be present. Additional monitoring should be performed under the direction of a Certified Industrial Hygienist, using calibrated realtime monitors or validated sampling and analytical protocols, with laboratory analysis by a laboratory accredited by the American Industrial Hygiene Association. 4. As a preventative measure, correct water intrusion into the basement to minimize microbial growth which can affect indoor air quality. Although the basement is used only for ventilation, plumbing and storage, the extensive water intrusion supports microbial growth on basement surfaces. These growths have the potential to affect indoor air quality in the occupied portions of the building. 5. As a preventative measure, ensure that all HVAC units are inspected and cleaned every six months. This check should be added to the Preventative Maintenance cycle for the spring and fall of each year, or more frequently if needed. 2

5 2. BACKGROU IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 In December 207, Helix Environmental, Inc. performed indoor air quality testing in the Jones Middle School at 200 Arlington Avenue, Upper Arlington, Ohio. The testing was requested to determine if significant concentrations of air contaminants were present in the building following reports of staff concerns. On December 9 and 20, 207, Mr. Ralph A. Froehlich, CIH, CSP, QEP and Mr. Benjamin Froehlich, IH of Helix Environmental, Inc. visited Jones Middle School to perform indoor air quality sampling of diagnostic chemical air contaminants and physical conditions. Mr. Ralph A. Froehlich is a Certified Industrial Hygienist with more than thirty years experience in the fields of occupational and environmental health. Mr. Benjamin Froehlich has more than ten years of experience in the field of environmental health. Mr. Chris Potts of Upper Arlington Schools arranged for the sampling site visit. Weather outside of the building was partly cloudy and cool, weather conditions typical of an early winter day in central Ohio during 207. Jones Middle School is used by teachers and other employees working in classrooms, common meeting areas, offices, and includes a kitchen and cafeteria, teacher lounge, gymnasium, auditorium, administration offices, vocational rooms, and receptionist areas. Calibrated realtime monitors were used to measure Volatile Organic Compound (VOC) levels, carbon monoxide, carbon dioxide, air temperature, and relative humidity on December 9 and 20, 207. In addition, total and individual VOCs were sampled using 6-liter SUMMA evacuated canisters at two indoor locations and outside of the building. All measurements were made between 3 and 4 feet above floor level in accordance with the manufacturer s instructions. Realtime sampling for hydrogen sulfide was not performed because the distinctive odor of hydrogen sulfide was not sensed by testing personnel. 3

6 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December SAMPLING A ANALYTICAL PROCEDURES Carbon Dioxide, Carbon Monoxide, Temperature, Relative Humidity A calibrated TSI Model 9555 monitor with Model 982 probe (SN 9555P09029 with P070008, calibrated 8/24/207) was used to measure carbon monoxide, carbon dioxide, air temperature, relative humidity, and air velocity. All measurements were made between 3 and 4 feet above floor level in accordance with the manufacturer s instructions. Volatile Organic Compounds (VOCs, Hydrocarbon Solvent Vapors) Realtime total VOC concentrations were measured at representative locations using a calibrated RAE Model 3000 Mini-RAE Photo-Ionization Detector (PID) with 0.6 ev lamp (SN , calibrated 2/8/207). Total and Individual VOC air samples were also sampled using 6-L SUMMA-Polished stainless steel evacuated canisters and were hand-delivered to ALS Environmental in Cincinnati, Ohio for analysis. VOC air samples were prepared and analyzed by gas chromatography/mass spectroscopy (GC/MS), in accordance with U. S. Environmental Protection Agency TO-5 Method. ALS Environmental is accredited by the American Industrial Hygiene Association (AIHA) for the laboratory analysis of industrial hygiene samples. AIHA-accredited laboratories successfully participate in the AIHA Proficiency Analytical Testing (PAT) program, in which spiked industrial hygiene samples are analyzed on a quarterly basis by all participating laboratories for analytical accuracy and precision in accordance with acceptable statistically acceptable ranges. AIHA-accredited laboratories are scrutinized on a regular basis to ensure that personnel, equipment, facilities and data are maintained. In addition, AIHA-accredited laboratories have well-developed assurance/quality control programs to ensure that analytical results accurately reflect conditions present during the sampling periods. Analytical results are attached. 4

7 4. APPLICABLE STAARDS IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 Occupational exposure limitations have been recommended or promulgated by several organizations, including the U.S. Occupational Safety and Health Administration (OSHA), the American Conference of Governmental Industrial Hygienists (ACGIH) and the National Institute for Occupational Safety and Health (NIOSH). Of these, only OSHA Permissible Exposure Limits (PELs) are legal requirements, and are considered the maximum exposure levels to which workers can be legally exposed. ACGIH recommendations, called Threshold Limit Values (TLVs), are reviewed on a regular basis and are updated over a two-year cycle. The ACGIH TLVs represent conditions to which it is believed that most workers may repeatedly be exposed without experiencing adverse health effects. The ACGIH TLVs represent the consensus of industrial hygienists about exposure levels, given the current state of knowledge. NIOSH recommendations represent the maximum exposure levels to which workers should be exposed to avoid occurrence of any adverse health effects without regard to economic feasibility. As such, NIOSH Recommended Exposure Levels (RELs) are conservative, especially in regard to cancer-causing substances. For these, NIOSH recommends that exposures reduced to as low as reasonably achievable or the limit of detection. Employers are required to limit exposures to the OSHA PELs but should seek to achieve the ACGIH TLVs and NIOSH RELs, if those limits are more protective. All three limitations are referenced. Carbon Monoxide (CO) The OSHA PEL for carbon monoxide is 50 ppm as an 8-hour TWA (29 CFR ). ACGIH recommends a TLV of 25 ppm for carbon monoxide as an 8-hour TWA (ACGIH, 207 TLVs and BEIs). NIOSH recommends an 8-hour TWA REL of 35 ppm for carbon monoxide, with a Ceiling concentration of 200 ppm. NIOSH also identifies,200 ppm carbon monoxide as the Immediately Dangerous to Life or Health concentration (NIOSH Pocket Guide to Chemical Hazards, 2007). Carbon Dioxide (CO 2 ) OSHA limits occupational exposures to 5,000 ppm carbon dioxide on an 8-hour TWA basis (29 CFR ). OSHA also recommends that,000 ppm carbon dioxide indicates inadequate ventilation, and complaints such as headaches, fatigue and eye and throat irritation will be more widespread. This level should be used as a guideline for maximizing comfort for all occupants. (OSHA Technical Manual, Section III, Chapter 2 Indoor Air Quality Investigation). 5

8 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 ACGIH recommends an 8-hour TWA Threshold Limit Value of 5,000 ppm, with a 30,000 ppm Short-Term Exposure Limit (ACGIH, 207 TLVs and BEIs). NIOSH recommends a 0-hour TWA Recommended Exposure Limit of 5,000 ppm with a 5-minute Short-Term Exposure Limit of 30,000 ppm. NIOSH also identifies 40,000 ppm as the Immediately Dangerous to Life or Health (IDLH) level for carbon dioxide (NIOSH Pocket Guide to Chemical Hazards, 2007). Temperature and Relative Humidity OSHA has not promulgated any occupational exposure limit for heat stress or comfort criteria for temperature or humidity. ACGIH recommends the use of Wet Bulb Globe Temperature (WBGT) values as screening criteria for heat stress at different metabolic Rate Categories with adjustments for clothing ensembles (ACGIH, 207 TLVs and BEIs). NIOSH recommends that heat stress be addressed by requiring hourly rest cycles above WBGT index values of 90 F for properly acclimatizing workers, and by training workers to recognize the symptoms of heat stress (NIOSH Criteria for a Recommended Standard: Occupational Exposure to Hot Environments, 986). The American Society for Heating, Refrigeration and Air-conditioning Engineers (ASHRAE) adopted Standard ASHRAE Thermal Environmental Conditions for Human Occupancy which describes air temperature and relative humidity conditions which represent the human comfort zone in conditioned buildings. The updated ASHRAE Standard considers additional factors such as clothing level, air speed, and metabolic heat load to predict the perceived acceptability of indoor thermal comfort levels. The CBE Thermal Comfort Tool (available at comforttool.cbe.berkeley.edu) can be used to evaluate thermal comfort conditions in accordance with the ASHRAE standard using assumed air speed of 0. m/s and a metabolic rate of.2 met. For summer clothing levels (0.5 clo), the comfort envelope ranges from F at 0% relative humidity and from F at 00% relative humidity. For winter indoor clothing levels ( clo), the comfort envelope ranges from F at 0% relative humidity and from F at 00% relative humidity. Volatile Organic Compounds (VOCs, Total Hydrocarbons, Petroleum Distillates, Naphtha, Solvent Vapors) The OSHA PEL for Total VOCs as petroleum distillates is 500 ppm (2000 mg/m 3 ) as an 8-hour TWA (29 CFR ). ACGIH recommends different TLVs for different mixtures of hydrocarbon vapors, ranging from 00 ppm as an eight-hour TWA for Stoddard Solvent to 300 ppm gasoline vapors as an eight-hour TWA, with a 5-minute Short-Term Exposure Limit (STEL) of 500 ppm for gasoline(acgih, 207 TLVs and BEIs). 6

9 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 NIOSH recommends an 8-hour TWA REL of 86 ppm for petroleum distillates with a 444 ppm 5-minute STEL. NIOSH also identifies 00 ppm petroleum distillates as the Immediately Dangerous to Life or Health concentration (NIOSH Pocket Guide to Chemical Hazards, 2007). 7

10 5. ANALYTICAL RESULTS IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE : VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Time Measurement Location Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) 9:57 am Outside, at Front Entrance :05 am First Floor, Administration Offices, SW 0:08 am First Floor, Administration Offices, S Central 0:2 am First Floor, W Central Storage Room 0:4 am First Floor, Guidance Offices, East 0:6 am First Floor, Guidance Offices, 06D :7 am First Floor, W Hallway :9 am Basement, W Central :2 am Basement, Center at AH :27 am Basement, NE :29 am Basement, N Center :3 am Basement, NE Central :36 am Basement, Field House Pump Room 0:38 am Basement, Field House Boiler Room 0:42 am First Floor, Field House, Center :47 am Basement, SW Area :49 am Basement, SW at AH :5 am Basement, SE :55 am Third Floor, Attic, NW :57 am Third Floor, Music Storage Room :00 am Third Floor, Attic, SE :02 am Third Floor, Attic, E Center

11 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE (CONTINUED): VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Time Measurement Location Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) :04 am Third Floor, Attic, NE :07 am Third Floor, N Center/Roof Access : am Third Floor, Room :3 am Third Floor, Hallway at 330A and 330B :6 am Third Floor, Room :9 am Third Floor, Room :22 am Third Floor, Room 306 NE :24 am Third Floor, Room 307 SE :26 am Third Floor, Room 304 NE :28 am Third Floor, Room :30 am Third Floor, Room :32 am Third Floor, Room :33 am Second Floor, Room :35 am Second Floor, Room :37 am Second Floor, Room :39 am Second Floor, Room :40 am Second Floor, Room :42 am Second Floor, Room :44 am Second Floor, Room :47 am Second Floor, Room :49 am Second Floor, Room :50 am Second Floor, Room :52 am Second Floor, Room :54 am Second Floor, Room :56 am Second Floor, Room :58 am Second Floor, Room :59 am Second Floor, Room :00 pm Second Floor, Room :02 pm Second Floor, Room

12 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE (CONTINUED): VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Time Measurement Location Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) 2:04 pm Second Floor, Room :06 pm Second Floor, Room :08 pm Second Floor, Room :09 pm Second Floor, Room :0 pm Second Floor, Room 223B E Storeroom 2:4 pm Second Floor, Auditorium Balcony 2:6 pm Second Floor, Room 240 Learning Center :8 pm Second Floor, Room 240 W :2 pm Second Floor, Room :33 pm Second Floor, Room :35 pm Second Floor, Room 240D :37 pm Second Floor, Room :39 pm Second Floor, Room :4 pm Second Floor, Room :43 pm Second Floor, Room 240 N :45 pm Second Floor, Room :46 pm Second Floor, Room :47 pm Second Floor, Room :49 pm Second Floor, Room :53 pm Outside, Front Entrance :50 pm Outside, Front Entrance :0 pm Second Floor, Room :03 pm Second Floor, Room :06 pm Second Floor, Room 268A :07 pm Second Floor, Room 268B : pm Second Floor, Room 240A :3 pm Second Floor, Stairwell S :6 pm First Floor, Stairwell S

13 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE (CONTINUED): VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Time Measurement Location 2:9 pm First Floor, Assistant Principal s Office 2:2 pm First Floor, Principal s Office Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) :25 pm First Floor, Room :28 pm First Floor, Room :30 pm First Floor, Room 02C :33 pm First Floor, Room :36 pm First Floor, Room 05 Clinic 2:38 pm First Floor, Room 05 Clinic SE Room :4 pm First Floor, Room :43 pm First Floor, Room :45 pm First Floor, Room 7 NW Server Room :48 pm First Floor, Room :50 pm First Floor, Room :52 pm First Floor, Room 6A :54 pm First Floor, Room :56 pm First Floor, Room :58 pm First Floor, Room :0 pm First Floor, Room 23C :03 pm First Floor, Hallway at E Center Stairwell S :05 pm First Floor, Room :07 pm First Floor, Room : pm First Floor, Room 24A :4 pm First Floor, Room :6 pm First Floor, Room :9 pm First Floor, Room :2 pm First Floor, Room

14 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE (CONTINUED): VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Time Measurement Location Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) 3:23 pm First Floor, Room :25 pm First Floor, Room :28 pm First Floor, Gymnasium :30 pm First Floor, Auditorium :32 pm First Floor, Room 35 Gymnasium Equipment :34 pm First Floor, Room :36 pm First Floor, Room :38 pm First Floor, Room :40 pm First Floor, Room :42 pm First Floor, Room :44 pm First Floor, Room :46 pm First Floor, Room :48 pm First Floor, Cafeteria :5 pm Outside, Front Entrance

15 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE 2 VOLATILE ORGANIC COMPOUS, CARBON MONOXIDE, CARBON DIOXIDE, TEMPERATURE & RELATIVE HUMIDITY MEASUREMENTS AT JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 20, 207. HELIX PROJECT NO Time Measurement Location Total VOCs (ppmc) Carbon Monoxide (ppm) Carbon Dioxide (ppm) Air Temperature ( F) Relative Humidity (%) 9:49 am Outside, Front Entrance :57 am First Floor, Cafeteria S Center :00 am First Floor, Cafeteria NW :0 am First Floor, Kitchen W :03 am First Floor, Kitchen E :05 am Second Floor, Room 237C :07 am Second Floor, Room 237E :09 am Second Floor, Room 237D :3 am Outside, Front Entrance JONES MIDDLE SCHOOL SUMMARY Average (outside) Low (indoor) High (indoor)

16 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 TABLE 3: VOLATILE ORGANIC COMPOU ANALYTICAL RESULTS FROM JONES MIDDLE SCHOOL, 200 ARLINGTON AVENUE, UPPER ARLINGTON, OHIO, MEASURED BY HELIX ENVIRONMENTAL, INC., DECEMBER 9, 207. HELIX PROJECT NO Sample No. Lab No Location Time Detected VOC Outside, Flagpole, 6 Ht. Third Floor, Room 34 Music, Center, 4 Ht. First Floor, Room 54 Art, 3.5 Ht. 2:00 pm 2:0 pm 3:5 pm Concentration (ppm) OSHA PEL (ppm) Acetone Chloromethane Estimated Total VOCs ,4-Dichlorobenzene Butanone (Methyl ethyl ketone) Propanol (Isopropyl alcohol) Acetone Chloromethane Cyclohexane Ethyl acetate Ethylbenzene Heptane Hexane m,p-xylene o-xylene Methylene chloride Toluene Estimated Total VOCs ,4-Dichlorobenzene Butanone (Methyl ethyl ketone) Propanol (Isopropyl alcohol) Acetone Chloroform Ceiling Chloromethane Heptane Methylene chloride Toluene Estimated Total VOCs

17 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December DISCUSSION A RECOMMEATIONS On December 9 and 20, 207, realtime air monitoring documented that indoor Total VOC levels ranged from less than 0.00 to 0.4 ppm, while the outdoor concentration was less than 0. ppm. Total VOCs were only detected in Third Floor Music Room 34. The carbon monoxide concentrations at inside locations ranged from nondetectable to 2.6 ppm while outdoor concentrations remained at nondetectable concentrations. Carbon monoxide concentrations at measurement locations were well below the OSHA PEL of 50 ppm, the ACGIH TLV of 25 ppm and the NIOSH REL of 35 ppm on both measurement days. Carbon dioxide concentrations inside of the school ranged from 570 to 354 ppm. The measured levels were greater than the average outside concentration of ppm measured outside of Jones Middle School, though they were well below the OSHA Permissible Exposure Limit of 5,000 ppm, the ACGIH TLV of 5,000 ppm or the NIOSH REL of 5,000 ppm. Carbon dioxide concentrations above the OSHA Indoor Air Quality recommendation of 000 ppm were measured in the following locations: Basement, W Central Second Floor, Room 22 Second Floor, Room 222 Second Floor, Room 228 Second Floor, Room 248 Second Floor, Room 254 Second Floor, Room 256 Second Floor, Room 258 Second Floor, Room 259 Third Floor, Room 330 On both monitoring days, air temperature levels at inside measurement locations ranged from 5.8 to 75.0 F, with relative humidity levels from 25.4 to 6.2% RH. Air temperatures and relative humidity measurements were within the comfort zone recommended by the American Society of Heating, Refrigeration and Air-conditioning Engineers (ASHRAE). Outside of the building, the air temperature averaged 58.7 F, with average relative humidity levels of 38.9% RH. Several Volatile Organic Compound (VOC) vapors were found at detectable concentrations in the building, but at total VOC concentrations less than 0.30 ppm. Area measurements documented the presence of low but detectable concentrations of the following VOCs inside of the building:,4-dichlorobenzene 2-Butanone (also called Methyl ethyl ketone) 2-Propanol (also called Isopropyl alcohol) Acetone 5

18 Chloroform Chloromethane Cyclohexane Ethyl acetate Ethylbenzene Heptane Hexane m, p-xylene o-xylene Methylene chloride Toluene IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 The exposure levels were well below all applicable OSHA occupational exposure limits, Other VOCs were less than the analytical limit of detection at ppm (0. ppb). In comparison, only acetone and chloromethane were detected in the outdoor sample, at a total VOC concentration of only ppm. During the indoor air quality measurements, extensive water intrusion was observed in the basement which has apparently existed for some time. At one location mineral deposits similar to a stalagmite were visible. Water intrusions can supply the moisture that microorganisms require for growth, and visible microbial growths were apparent at several locations. Correction of water intrusions is recommended as a preventative measure to ensure that indoor air quality is not affected by microbial growth. Although concentrations of measured air contaminants were well below OSHA Permissible Exposure Limits or other applicable recommendations, additional exposure monitoring is recommended when an investigation into air quality complaints indicates that indoor air quality issues may be present. Based on the air monitoring results, Helix Environmental, Inc. recommends that:. Make air sampling measurement results available to all sampled and affected employees. Air monitoring information can be presented verbally, in employee meetings, in writing, or by posting of notification letters, and should include all pertinent information from the analytical results tables. This air monitoring information should also be maintained in company record keeping systems, to allow its retrieval as needed. 2. Evaluate the ventilation systems serving the rooms where carbon dioxide concentrations were found to be above 000 ppm to ensure that their outdoor air supply is adequate. Properly-adjusted air handlers should be able to supply the required amounts of outdoor air to all supplied rooms. Where problems are identified, they should be corrected immediately. If improvements are identified, they should be considered as soon as possible. 6

19 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December Consider additional air monitoring when an investigation into air quality complaints indicate that indoor air quality issued may be present. Additional monitoring should be performed under the direction of a Certified Industrial Hygienist, using calibrated realtime monitors or validated sampling and analytical protocols, with laboratory analysis by a laboratory accredited by the American Industrial Hygiene Association. 4. As a preventative measure, correct water intrusion into the basement to minimize microbial growth which can affect indoor air quality. Although the basement is used only for ventilation, plumbing and storage, the extensive water intrusion supports microbial growth on basement surfaces. These growths have the potential to affect indoor air quality in the occupied portions of the building. 5. As a preventative measure, ensure that all HVAC units are inspected and cleaned every six months. This check should be added to the Preventative Maintenance cycle for the spring and fall of each year, or more frequently if needed. 7

20 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December APPEICES 8

21 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 APPEIX A: ANALYTICAL RESULTS A

22 05-Jan-208 Ralph Froehlich Helix Environmental, Inc. Elizabeth Place Suite 60 Dayton, OH Tel: Fax: Re: 6689 / Jones Middle School Work Order: Dear Ralph, ALS Environmental received 3 samples on 2-Dec-207 :30 AM for the analyses presented in the following report. The analytical data provided relates directly to the samples received by ALS Environmental and for only the analyses requested. QC sample results for this data met laboratory specifications. Any exceptions are noted in the Case Narrative, or noted with qualifiers in the report or QC batch information. Should this laboratory report need to be reproduced, it should be reproduced in full unless written approval has been obtained from ALS Laboratory Group. Samples will be disposed in 30 days unless storage arrangements are made. The total number of pages in this report is 2. If you have any questions regarding this report, please feel free to contact me. Sincerely, Chris Gibson Electronically approved by: Chris Gibson Chris Gibson Project Manager ADDRESS 4388 Glendale Milford Rd Cincinnati, Ohio PHONE (53) FAX (53) ALS GROUP USA, CORP. Part of the ALS Group An ALS Limited Company

23 ALS Environmental Date: 05-Jan-8 Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Work Order: Work Order Sample Summary Lab Samp ID Client Sample ID Matrix Tag Number Collection Date Date Received Hold Air Air Air 2/9/207 2/2/207 :30 2/9/207 2/2/207 :30 2/9/207 2/2/207 :30 SS Page of

24 ALS Environmental Date: 05-Jan-8 Client: Project: Work Order: Helix Environmental, Inc / Jones Middle School Case Narrative The analytical data provided relates directly to the samples received by ALS Environmental and for only the analyses requested. Results relate only to the items tested and are not blank corrected unless indicated. QC sample results for this data met laboratory specifications. Any exceptions are noted in the Case Narrative, or noted with qualifiers in the report or QC batch information. Should this laboratory report need to be reproduced, it should be reproduced in full unless written approval has been obtained from ALS Environmental. Samples will be disposed in 30 days unless storage arrangements are made. CN Page of

25 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Report Analyses Result Qual Limit Units Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Dilution Factor Date Analyzed TO-5 BY GC/MS,,-Trichloroethane ETO-5 Analyst: MRJ,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene,4-Dioxane.0 ppbv 2-Butanone 2-Hexanone 2-Propanol.0 ppbv 4-Ethyltoluene 4-Methyl-2-pentanone Acetone ppbv Benzene Benzyl chloride Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chloroethane Chloroform 0.20 ppbv Chloromethane 0.63 cis-,2-dichloroethene cis-,3-dichloropropene Cumene Cyclohexane Dibromochloromethane Dichlorodifluoromethane Note: AR Page of 2

26 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Ethyl acetate Ethylbenzene Freon 3 Freon 4 Heptane Hexachlorobutadiene Hexane m,p-xylene Methylene chloride MTBE Naphthalene o-xylene Propene Styrene Tetrachloroethene Tetrahydrofuran Toluene trans-,2-dichloroethene trans-,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl acetate Vinyl chloride Surr: Bromofluorobenzene.0 ppbv 0.20 ppbv 0.20 ppbv %REC TO-5 BY GC/MS,,-Trichloroethane,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene ETO Analyst: MRJ Note: AR Page 2 of 2

27 ALS Environmental Date: 05-Jan-8 Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Work Order: Sample ID: Lab ID: Collection Date: 2/9/207 Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed,4-Dioxane Butanone.47 2-Hexanone Propanol Ethyltoluene Methyl-2-pentanone 2.05 Acetone Benzene.60 Benzyl chloride 2.59 Bromodichloromethane 3.35 Bromoform 5.7 Bromomethane.94 Carbon disulfide.56 Carbon tetrachloride 3.5 Chlorobenzene 2.30 Chloroethane.32 Chloroform Chloromethane cis-,2-dichloroethene.98 cis-,3-dichloropropene 2.27 Cumene 2.46 Cyclohexane.72 Dibromochloromethane 4.26 Dichlorodifluoromethane 2.47 Ethyl acetate.80 Ethylbenzene 2.7 Freon Freon Heptane 2.05 Hexachlorobutadiene 5.33 Hexane.76 m,p-xylene 2.7 Methylene chloride 3.47 MTBE.80 Naphthalene.05 o-xylene 2.7 Propene 0.86 Styrene 2.3 Tetrachloroethene 3.39 Tetrahydrofuran.47 Note: AR Page 3 of 2

28 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Toluene trans-,2-dichloroethene trans-,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl acetate Vinyl chloride Surr: Bromofluorobenzene %REC Note: AR Page 4 of 2

29 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Report Analyses Result Qual Limit Units Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Dilution Factor Date Analyzed TO-5 BY GC/MS,,-Trichloroethane ETO-5 Analyst: MRJ,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene.5,4-Dioxane.0 ppbv 2-Butanone Hexanone 2-Propanol ppbv 4-Ethyltoluene 4-Methyl-2-pentanone Acetone 39 0 ppbv 0 /4/208 :59 AM Benzene Benzyl chloride Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chloroethane Chloroform 0.20 ppbv Chloromethane 0.77 cis-,2-dichloroethene cis-,3-dichloropropene Cumene Cyclohexane. Dibromochloromethane Dichlorodifluoromethane Note: AR Page 5 of 2

30 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Ethyl acetate 0.50 Ethylbenzene 0.84 Freon 3 Freon 4 Heptane 54 Hexachlorobutadiene Hexane 4.8 m,p-xylene 3.2 Methylene chloride 3.7 MTBE Naphthalene o-xylene 0.83 Propene Styrene Tetrachloroethene Tetrahydrofuran Toluene 70 trans-,2-dichloroethene trans-,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl acetate Vinyl chloride Surr: Bromofluorobenzene 08 TO-5 BY GC/MS,,-Trichloroethane,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene 9.20 Note: 5.0 ppbv 0.0 ppbv 0.20 ppbv 5.0 ppbv ppbv %REC ETO /4/208 :59 AM /4/208 :59 AM Analyst: MRJ AR Page 6 of 2

31 ALS Environmental Date: 05-Jan-8 Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Work Order: Sample ID: Lab ID: Collection Date: 2/9/207 Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed,4-Dioxane Butanone Hexanone Propanol Ethyltoluene Methyl-2-pentanone 2.05 Acetone /4/208 :59 AM Benzene.60 Benzyl chloride 2.59 Bromodichloromethane 3.35 Bromoform 5.7 Bromomethane.94 Carbon disulfide.56 Carbon tetrachloride 3.5 Chlorobenzene 2.30 Chloroethane.32 Chloroform Chloromethane cis-,2-dichloroethene.98 cis-,3-dichloropropene 2.27 Cumene 2.46 Cyclohexane Dibromochloromethane 4.26 Dichlorodifluoromethane 2.47 Ethyl acetate Ethylbenzene Freon Freon Heptane /4/208 :59 AM Hexachlorobutadiene 5.33 Hexane m,p-xylene Methylene chloride MTBE.80 Naphthalene.05 o-xylene Propene 0.86 Styrene 2.3 Tetrachloroethene 3.39 Tetrahydrofuran.47 Note: AR Page 7 of 2

32 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Toluene /4/208 :59 AM trans-,2-dichloroethene.98 trans-,3-dichloropropene 2.27 Trichloroethene.07 Trichlorofluoromethane 2.8 Vinyl acetate.76 Vinyl chloride.28 Surr: Bromofluorobenzene %REC Note: AR Page 8 of 2

33 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Report Analyses Result Qual Limit Units Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Dilution Factor Date Analyzed TO-5 BY GC/MS,,-Trichloroethane ETO-5 Analyst: MRJ,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene 2.,4-Dioxane.0 ppbv 2-Butanone Hexanone 2-Propanol ppbv 4-Ethyltoluene 4-Methyl-2-pentanone Acetone 80 0 ppbv 0 /4/208 2:38 PM Benzene Benzyl chloride Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chloroethane Chloroform ppbv Chloromethane 0.78 cis-,2-dichloroethene cis-,3-dichloropropene Cumene Cyclohexane Dibromochloromethane Dichlorodifluoromethane Note: AR Page 9 of 2

34 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Ethyl acetate Ethylbenzene Freon 3 Freon 4 Heptane 0.60 Hexachlorobutadiene Hexane m,p-xylene Methylene chloride 3.7 MTBE Naphthalene o-xylene Propene Styrene Tetrachloroethene Tetrahydrofuran Toluene 45 trans-,2-dichloroethene trans-,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl acetate Vinyl chloride Surr: Bromofluorobenzene 0 TO-5 BY GC/MS,,-Trichloroethane,,2,2-Tetrachloroethane,,2-Trichloroethane,-Dichloroethane,-Dichloroethene,2,4-Trichlorobenzene,2,4-Trimethylbenzene,2-Dibromoethane,2-Dichlorobenzene,2-Dichloroethane,2-Dichloropropane,3,5-Trimethylbenzene,3-Butadiene,3-Dichlorobenzene,4-Dichlorobenzene 2.4 Note:.0 ppbv 0.20 ppbv 5.0 ppbv ppbv %REC ETO /4/208 2:38 PM Analyst: MRJ AR Page 0 of 2

35 ALS Environmental Date: 05-Jan-8 Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Work Order: Sample ID: Lab ID: Collection Date: 2/9/207 Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed,4-Dioxane Butanone Hexanone Propanol Ethyltoluene Methyl-2-pentanone 2.05 Acetone /4/208 2:38 PM Benzene.60 Benzyl chloride 2.59 Bromodichloromethane 3.35 Bromoform 5.7 Bromomethane.94 Carbon disulfide.56 Carbon tetrachloride 3.5 Chlorobenzene 2.30 Chloroethane.32 Chloroform Chloromethane.6.03 cis-,2-dichloroethene.98 cis-,3-dichloropropene 2.27 Cumene 2.46 Cyclohexane.72 Dibromochloromethane 4.26 Dichlorodifluoromethane 2.47 Ethyl acetate.80 Ethylbenzene 2.7 Freon Freon Heptane Hexachlorobutadiene 5.33 Hexane.76 m,p-xylene 2.7 Methylene chloride MTBE.80 Naphthalene.05 o-xylene 2.7 Propene 0.86 Styrene 2.3 Tetrachloroethene 3.39 Tetrahydrofuran.47 Note: AR Page of 2

36 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School Sample ID: Collection Date: 2/9/207 Date: 05-Jan-8 Work Order: Lab ID: Matrix: AIR Analyses Result Qual Report Limit Units Dilution Factor Date Analyzed Toluene /4/208 2:38 PM trans-,2-dichloroethene.98 trans-,3-dichloropropene 2.27 Trichloroethene.07 Trichlorofluoromethane 2.8 Vinyl acetate.76 Vinyl chloride.28 Surr: Bromofluorobenzene %REC Note: AR Page 2 of 2

37 ALS Environmental Client: Helix Environmental, Inc. Work Order: Project: 6689 / Jones Middle School Date: 05-Jan-8 QC BATCH REPORT Batch ID: R4899 Instrument ID VMS3 Method: ETO-5 mblk Client ID: Sample ID: mblk09988-r4899 Run ID: VMS3_8003A Units: ppbv SeqNo: Analysis Date: /3/208 04:50 PM Prep Date: DF: Analyte Result PQL SPK Val SPK Ref Value %REC Control Limit RPD Ref Value %RPD RPD Limit Qual,,-Trichloroethane 0.50,,2,2-Tetrachloroethane 0.50,,2-Trichloroethane 0.50,-Dichloroethane 0.50,-Dichloroethene 0.50,2,4-Trichlorobenzene 0.50,2,4-Trimethylbenzene 0.50,2-Dibromoethane 0.50,2-Dichlorobenzene 0.50,2-Dichloroethane 0.50,2-Dichloropropane 0.50,3,5-Trimethylbenzene 0.50,3-Butadiene 0.50,3-Dichlorobenzene 0.50,4-Dichlorobenzene 0.50,4-Dioxane.0 2-Butanone Hexanone Propanol.0 4-Ethyltoluene Methyl-2-pentanone 0.50 Acetone.0 Benzene 0.50 Benzyl chloride 0.50 Bromodichloromethane 0.50 Bromoform 0.50 Bromomethane 0.50 Carbon disulfide 0.50 Carbon tetrachloride 0.50 Chlorobenzene 0.50 Chloroethane 0.50 Chloroform 0.20 Chloromethane 0.50 cis-,2-dichloroethene 0.50 cis-,3-dichloropropene 0.50 Cumene 0.50 Cyclohexane 0.50 Dibromochloromethane 0.50 Dichlorodifluoromethane 0.50 Ethyl acetate 0.50 Ethylbenzene 0.50 Note: See Qualifiers Page for a list of Qualifiers and their explanation. QC Page: of 4

38 Client: Work Order: Project: Helix Environmental, Inc / Jones Middle School QC BATCH REPORT Batch ID: R4899 Instrument ID VMS3 Method: ETO-5 Freon Freon Heptane 0.50 Hexachlorobutadiene 0.50 Hexane 0.50 m,p-xylene 0.50 Methylene chloride.0 MTBE 0.50 Naphthalene 0.20 o-xylene 0.50 Propene 0.50 Styrene 0.50 Tetrachloroethene 0.50 Tetrahydrofuran 0.50 Toluene 0.50 trans-,2-dichloroethene 0.50 trans-,3-dichloropropene 0.50 Trichloroethene 0.20 Trichlorofluoromethane 0.50 Vinyl acetate 0.50 Vinyl chloride 0.50 Surr: Bromofluorobenzene Note: See Qualifiers Page for a list of Qualifiers and their explanation. QC Page: 2 of 4

39 Client: Helix Environmental, Inc. QC BATCH REPORT Work Order: Project: 6689 / Jones Middle School Batch ID: R4899 Instrument ID VMS3 Method: ETO-5 lcs Sample ID: lcs-r4899 Units: ppbv Analysis Date: /3/208 02:59 PM Client ID: Run ID: VMS3_8003A SeqNo: Prep Date: DF: SPK Ref Control RPD Ref RPD Analyte Result PQL SPK Val Value %REC Limit Value %RPD Limit Qual,,-Trichloroethane ,,2,2-Tetrachloroethane ,,2-Trichloroethane ,-Dichloroethane ,-Dichloroethene ,2,4-Trichlorobenzene ,2,4-Trimethylbenzene ,2-Dibromoethane ,2-Dichlorobenzene ,2-Dichloroethane ,2-Dichloropropane ,3,5-Trimethylbenzene ,3-Butadiene ,3-Dichlorobenzene ,4-Dichlorobenzene ,4-Dioxane Butanone Hexanone Propanol Ethyltoluene Methyl-2-pentanone Acetone Benzene Benzyl chloride Bromodichloromethane Bromoform Bromomethane Carbon disulfide Carbon tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-,2-dichloroethene cis-,3-dichloropropene Cumene Cyclohexane Dibromochloromethane Dichlorodifluoromethane Ethyl acetate Ethylbenzene Freon Note: See Qualifiers Page for a list of Qualifiers and their explanation. QC Page: 3 of 4

40 Client: Helix Environmental, Inc. QC BATCH REPORT Work Order: Project: 6689 / Jones Middle School Batch ID: R4899 Instrument ID VMS3 Method: ETO-5 Freon Heptane Hexachlorobutadiene Hexane m,p-xylene Methylene chloride MTBE Naphthalene o-xylene Propene Styrene Tetrachloroethene Tetrahydrofuran Toluene trans-,2-dichloroethene trans-,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl acetate Vinyl chloride Surr: Bromofluorobenzene The following samples were analyzed in this batch: A 02A 03A Note: See Qualifiers Page for a list of Qualifiers and their explanation. QC Page: 4 of 4

41 ALS Environmental Client: Helix Environmental, Inc. Project: 6689 / Jones Middle School WorkOrder: Date: 05-Jan-8 QUALIFIERS, ACRONYMS, UNITS Qualifier Description * Value exceeds Regulatory Limit a Not accredited B Analyte detected in the associated Method Blank above the Reporting Limit E Value above quantitation range H Analyzed outside of Holding Time J Analyte detected below quantitation limit n Not offered for accreditation Not Detected at the Reporting Limit O Sample amount is > 4 times amount spiked P Dual Column results percent difference > 40% R RPD above laboratory control limit S Spike Recovery outside laboratory control limits U Analyzed but not detected above the MDL Acronym Description DUP Method Duplicate E EPA Method LCS Laboratory Control Sample LCSD Laboratory Control Sample Duplicate MBLK Method Blank MDL Method Detection Limit MQL Method Quantitation Limit MS Matrix Spike MSD Matrix Spike Duplicate PDS Post Digestion Spike PQL Practical Quantitaion Limit SDL Sample Detection Limit SW SW-846 Method Units Reported Description µg/m3 ppbv QF Page of

42 ALS Environmental Sample Receipt Checklist Client Name: HELIX-DAYTON Date/Time Received: 2-Dec-7 :30 Work Order: Received by: JNW Checklist completed by Jan Wilcox esignature 22-Dec-7 Reviewed by: Chris Gibson 27-Dec-7 Date esignature Date Matrices: Carrier name: ALSHN Shipping container/cooler in good condition? Yes No Not Present Custody seals intact on shipping container/cooler? Yes No Not Present Custody seals intact on sample bottles? Yes No Not Present Chain of custody present? Yes No Chain of custody signed when relinquished and received? Yes No Chain of custody agrees with sample labels? Yes No Samples in proper container/bottle? Yes No Sample containers intact? Yes No Sufficient sample volume for indicated test? Yes No All samples received within holding time? Yes No Container/Temp Blank temperature in compliance? Yes No Temperature(s)/Thermometer(s): Cooler(s)/Kit(s): Water - VOA vials have zero headspace? Yes No No VOA vials submitted Water - ph acceptable upon receipt? Yes No N/A ph adjusted? Yes No N/A ph adjusted by: Login Notes: Client Contacted: Contacted By: Date Contacted: Regarding: Person Contacted: Comments: CorrectiveAction: SRC Page of

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44 IOOR AIR QUALITY TESTING IN JONES MIDDLE SCHOOL UPPER ARLINGTON, OHIO December 207 APPEIX B: CALIBRATION RECORDS B

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