481756/900/901/02/028i 100 Wellington Square T9.07 Brantford, ON, N3T 2M3

Transcription

1 CH2M HILL Canada Limited 72 Victoria Street Suite 300 Kitchener, ON N2G 4Y9 O F Tara Tran, MCIP, RPP Policy Planner The Corporation of the City of Brantford /0/1/02/028i 100 Wellington Square T9.07 Brantford, ON, N3T 2M3 October 14, 2015 Subject: Results of Ambient Air Sampling Activities for VOCs, PM 10, and PAHs July 23 September 25, 2015 Greenwich Mohawk Brownfield, Brantford Dear Ms. Tran, 1. Introduction The Corporation of the City of Brantford (City) retained CH2M HILL Canada Limited (CH2M) to provide environmental services for three properties 347 Greenwich Street, and 22 and 66 Mohawk Street collectively known as the Greenwich Mohawk Brownfield (Site), located within Brantford, Ontario. Remediation activities occurring on Site are expected to cause emissions to the air, including off gassing of volatile organic compounds (VOCs) from soil during excavation and handling, combustion products from on Site mobile equipment and dust from soil handling and transport. To provide information regarding the emissions of VOC and particulate matter and lead, discrete ambient air monitoring has been conducted as previously reported in letters dated June 26 and July 9, Additional ambient air monitoring is planned over eight separate events from July 23 and extending into September The purpose of this letter is to provide the ongoing results of the sampling activities for these additional sampling events. VOC monitoring was being performed at six station locations using Summa Canisters. At four of the six stations there was a monitor for the discrete collection of samples for analysis for Particulate Matter less than 10 micrometres in diameter (PM 10 ) and lead. The VOC and PM 10 samples were collected over a 24 hour period on days when normal activities were occurring on Site and on days when there was no precipitation. Two sets of polycyclic aromatic hydrocarbons (PAHs) samples were taken on September 17 and on September 24, Sampling Activities VOCs VOC samples were collected, handled, and analyzed in accordance with USEPA Method TO 15 Determination of Volatile Organic Compounds (VOCs) In Air Collected in Specially Prepared Canister and Analyzed by Gas Chromatography/Mass Spectrometry (GC/MS) (US EPA, January 1999). The method is based on the measured intake of VOC containing air into a specially prepared canister over a known period of time. Since several of the expected VOCs have 24 hour point of impingement (POI) O. Reg. 419/05 standards and ambient air criteria associated with them, the sampling duration was also 24 hours. Sampler inlet height was initially set at approximately 2 metres above ground; however, subsequent sampling events, beginning on September 2, utilized sampler inlet heights of approximately _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

2 Tara Tran, MCIP, RPP Page 2 October 14, metres above the ground. VOCs were quantified consistent with Table 1 of US EPA Compendium Method TO 15 EPA/625/R 96/010b (USEPA, January 1999). The lab analysis was performed by ALS Environmental (ALS). ALS maintains accreditation from the Standards Council of Canada for VOC analysis by High Resolution gas chromatography mass spectrometry (GC/MS) (HRMS). PM 10 /Lead Samples were obtained under a typical flow rate of approximately 16.7 litres/minute (24 cubic metres per day (m 3 /day)) onto a pre weighed 47 millimetre (mm) quartz filter. As with the previous sampling, BGI Incorporated PQ 100s will be used for the sample collections using a PM 10 cyclonic separation head. Collection started on midnight and ended on midnight the next day at all four locations. Weighing of the filter after sample collection determines the mass of PM 10 over the course of the day and 24 hour average concentrations are determined by dividing by the total volume of air sampled (typically 24 m 3 ). Lead was measured on the filter particulate using EPA Method 6010C, Inductively Coupled Plasma Atomic Emission Spectroscopy. Analyses for PM 10 and lead was completed by Maxxam Laboratories. PAH Samples were collected using the hi volume (approximately 300 m 3 per day) Tisch TE1000 PUF Samplers using polyurethane foam (PUF) cartridges and 4 inch filters. The equipment flow rates were calibrated using a slack tube manometers calibrated by Tisch Environmental on September 16, Samples were collected over a 24 hour period. Speciated PAHs will be measured according to EPA Method TO 13A, Determination of Polycyclic Aromatic Hydrocarbons (PAHs) in Ambient Air Using Gas Chromatography/Mass Spectrometry (GC/MS). Analyses for PAHs were done by Maxxam Laboratories. The sampling locations for both VOC, PAH, and PM 10 are shown in Attachment 1. PAH samplers are located in close proximity to the PM 10 samplers. The sampling schedule and wind information during the sampling time periods are provided in Table 1. Grey highlights indicate new information provided in this report. Table 1. VOC Sampling Schedule and Wind Condition Contaminants Sampling Event # Start VOC #1 07/23/2015, Approx. 10:00 am #2 07/30/2015, Approx. 08:00 am #3 08/05/2015 Approx. 14:30 pm #4 08/11/2015 Approx. 11:00 am #5 08/20/2015 Approx. 12:00 noon #6 09/02/2015 Approx. 16:00 pm #7 09/10/2015 Approx. 11:30 am Sampling Period End 07/24/2015, Approx. 10:00 am 07/31/2015, Approx. 08:00 am 08/06/2015 Approx. 14:30 pm 08/12/2015 Approx. 11:00 am 08/21/2015 Approx. 12:00 noon 09/03/2015 Approx. 16:00 pm 09/11/2015 Approx. 11:30 am Predominant Wind at the Site Wind Direction (blow from) Average Wind Speed (m/s) West northwest 1.03 West and west northwest 2.14 West northwest 1.37 West northwest 1.86 West southwest and West West on Sep 02 and east southeast on Sep 03 North northeast and East northeast (EC) (EC) _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

3 Tara Tran, MCIP, RPP Page 3 October 14, 2015 Table 1. VOC Sampling Schedule and Wind Condition Contaminants Sampling Event # Start #8 09/17/2015 Approx. 10:30 am PM 10 #1 07/27/ :00 (midnight) #2 08/06/ :00 (midnight) #3 08/13/ :00 (midnight) #4 08/21/ :00 (midnight) #5 09/02/ :00 (midnight) #6 09/10/ :00 (midnight) #7 09/18/ :00 (midnight) PAHs #1 09/17/2015 Approx. 10:40 am #2 09/24/2015 Approx. 13:00 pm Sampling Period End 09/18/2015 Approx. 10:30 am 07/28/ :00 (midnight) 08/07/ :00 (midnight) 08/14/ :00 (midnight) 08/22/ :00 (midnight) 09/03/ :00 (midnight) 09/11/ :00 (midnight) 09/19/ :00 (midnight) 09/18/2015 Approx. 10:40 am 09/18/2015 Approx. 13:00 pm Notes: EC = Environment Canada Brantford Airport meteorological data Predominant Wind at the Site Wind Direction (blow from) Average Wind Speed (m/s) Southwest 0.83 South and east southeast 0.38 West northwest and southeast 0.49 Southwest 1.21 West 1.62 West and southwest 0.77 North northwest and East northeast in the morning (EC) 1.74 (EC) Southwest 0.71 Southwest 0.83 West northwest and west 1.96 The wind data were collected from the on Site meteorological station located near Station 22 AR04 shown in Attachment 1 except where otherwise noted. A wind rose for a time period from one hour before sampling start to one hour after sampling end was generated for each sampling event and provided in Attachment Results ALS Certificate of Analysis (COA) for VOCs, and Maxxam COA for particulate matter and lead are included in Attachment 3. A summary of the results of the eight VOC sampling events, and the six PM 10 and lead sampling events are provided below. This following list only shows the VOCs that had at least one measured concentration above the method detection limit at any one or more of the six sampling locations, but all lab results for PM 10 and lead are listed. The results indicate none of the VOCs scanned by Method TO 15 exceeded the Schedule 3 standards or applicable guideline values, and lead did not exceed the applicable Schedule 3 standards. In Table 2, all VOCs except toluene and ethyl acetate have health based limiting effects within O. Reg. 419/05, while toluene and ethyl acetate have an odour based limiting effect. Benzene does not have a Schedule 3 standard, so the 24 hr Ontario Ambient Air Quality Criteria for benzene was used. The MOECC has not established a standard or guideline for 1,1,2 trichloroethane or 4 ethyl toluene, therefore the result was compared to the Texas Commission on Environmental Quality Effects Screening Level (TCEQ ESL). The results indicate that lead and VOC property line concentrations were less than applicable standards and guidelines at all sampling locations during the sampling events _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

4 Tara Tran, MCIP, RPP Page 4 October 14, 2015 There were a total of five occurrences of property line PM 10 concentrations being greater than the Ontario interim ambient air quality criterion of 50 µg/m 3 on July 27 (one station), Aust 21 (one station), and on September 2 (three stations). No exceedances were measured on the subsequent September 11 sampling day. It should be stressed that the PM 10 interim standard is not a health based standard and is used for decision making purposes only. PM 10 readings are used by the project team to refine and implement additional dust control strategies, as necessary. It should be stressed that the identifier ND in the table below means that the contaminant was not detectable by the laboratory, meaning that within the uncertainties in the analysis method, the concentration is not statistically greater than zero. A summary of the September 17/18 and September 24/25 PAH sampling results are presented in Table 3. In Table 3, naphthalene and benzo(a)pyrene have health based limiting effects within O. Reg. 419/05, while biphenyl has 1 hour odour based limiting effect guideline concentration. The MOECC has not established a standard or guideline for several of the speciated PAHs, therefore the results were compared to the Texas Commission on Environmental Quality Effects Screening Level (TCEQ ESL) where available. Only those PAHs that were lab detected at least one monitoring location and have either an MOECC or Texas ESL are shown in Table 3. The results indicate that PAH property line concentrations were less than applicable standards and guidelines at all sampling locations during the sampling events. Table 2. Comparison of 24 hour Average VOCs, PM 10 and Lead Concentrations against O. Reg. 419/03 Schedule 3 Standards or Guideline Values 2015 Contaminants MOE Standard Air Monitoring Results (µg/m 3 ) Schedule 3 1 Guideline 1 Sampling Period 8 Off Mohawk St. Off Greenwich St (µg/m 3 ) (µg/m 3 ) AR02 AR01 AR04 AR08 AR05 AR07 Acetone 11,880 (health) 07/23 07/ /30 07/ /05 08/ /11 08/ /20 08/ /02 09/ /10 09/ /17 09/ N/A Benzene 2.3 (health) 2 07/23 07/ ND ND ND ND ND 09/02 09/ ND ND ND 09/10 09/11 ND ND ND ND 09/17 09/ N/A ND ND ND Bromomethane 1,350 (health) 07/30 07/ ND ND ND ND ND Chloromethane 320 (health) 07/23 07/ /30 07/ /05 08/ /11 08/ /20 08/ /02 09/ /10 09/ /17 09/ N/A Cyclohexane 6100 (health) 09/02 09/03 ND ND ND ND /17 09/18 ND ND N/A ND 1.3 ND _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

5 Tara Tran, MCIP, RPP Page 5 October 14, 2015 Table 2. Comparison of 24 hour Average VOCs, PM 10 and Lead Concentrations against O. Reg. 419/03 Schedule 3 Standards or Guideline Values 2015 Contaminants MOE Standard Air Monitoring Results (µg/m 3 ) Schedule 3 1 Guideline 1 Sampling Period 8 Off Mohawk St. Off Greenwich St (µg/m 3 ) (µg/m 3 ) AR02 AR01 AR04 AR08 AR05 AR07 Dichlorodifluoromethane 500,000 (health) 07/23 07/ /30 07/ /05 08/ /11 08/ /20 08/ /02 09/ /10 09/ /17 09/ N/A Dichloromethane 220 (health) 08/20 08/ /02 09/03 ND ND 0.7 ND ND ND 09/10 09/ Ethyl acetate 19,000 (Odour) 3 07/23 07/ /05 08/06 ND ND 0.74 ND ND ND 09/17 09/ N/A Ethylbenzene 1,000 (health) 08/05 08/ ND ND ND ND ND 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND ND ND 1.14 ND 09/10 09/11 ND ND ND 09/17 09/18 ND ND N/A ND 4 Ethyltoluene 500 (JSL) 7 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND ND ND 1.78 ND n Heptane 11,000 (health) 07/23 07/ ND 07/30 07/31 ND ND ND ND /05 08/ ND ND ND ND ND 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND ND ND 0.91 ND 09/10 09/11 ND ND 0.82 ND 0.91 ND n Hexane 2,500 (health) 08/05 08/ ND ND ND ND ND 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND ND 0.92 ND /10 09/ /17 09/ N/A Isopropyl alcohol 7,300 (health) 07/23 07/ ND ND ND ND 08/20 08/21 ND ND ND ND 2.9 ND 09/02 09/03 ND ND ND /10 09/ ND 09/17 09/18 ND 3.3 N/A 4 ND ND Methyl ethyl ketone 1,000 (health) 07/23 07/ /30 07/ /05 08/ _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

6 Tara Tran, MCIP, RPP Page 6 October 14, 2015 Table 2. Comparison of 24 hour Average VOCs, PM 10 and Lead Concentrations against O. Reg. 419/03 Schedule 3 Standards or Guideline Values 2015 Contaminants MOE Standard Air Monitoring Results (µg/m 3 ) Schedule 3 1 Guideline 1 Sampling Period 8 Off Mohawk St. Off Greenwich St (µg/m 3 ) (µg/m 3 ) AR02 AR01 AR04 AR08 AR05 AR07 09/02 09/ /10 09/ /17 09/ N/A Tetrachloroethylene 360 (health) 08/20 08/ ND ND ND ND Toluene 2,000 (odour) 07/23 07/ /30 07/ /05 08/ /11 08/ /20 08/ ND ND /02 09/ /10 09/ /17 09/ N/A ,1,2 Trichloroethane 55 (health) 4 07/23 07/ ND ND ND ND ND Trichlorofluoromethane 6,000 (health) 07/23 07/ /30 07/ /05 08/ /11 08/ /20 08/ ND /02 09/ /10 09/ /17 09/ N/A ,2,4 Trimethylbenzene 220 (health) 08/05 08/ ND ND ND ND ND 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND ND /17 09/18 ND 0.98 N/A o Xylene 730 (health) 5 07/23 07/ ND ND ND ND 09/02 09/03 ND ND ND ND /10 09/11 ND /17 09/ N/A m&p Xylene 07/23 07/ ND ND ND 08/05 08/ ND ND ND ND ND 08/20 08/21 ND ND ND ND ND /02 09/03 ND ND /10 09/ /17 09/ N/A PM ,6 07/27 0:00 24: N/A /06 0:00 24: /13 0:00 24: /21 0:00 24: /02 0:00 24:00 N/A _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

7 Tara Tran, MCIP, RPP Page 7 October 14, 2015 Table 2. Comparison of 24 hour Average VOCs, PM 10 and Lead Concentrations against O. Reg. 419/03 Schedule 3 Standards or Guideline Values 2015 Contaminants MOE Standard Air Monitoring Results (µg/m 3 ) Schedule 3 1 Guideline 1 Sampling Period 8 Off Mohawk St. Off Greenwich St (µg/m 3 ) (µg/m 3 ) AR02 AR01 AR04 AR08 AR05 AR07 09/10 0:00 24: /18 0:00 24: ND Total lead 0.5 (health) 07/27 0:00 24:00 ND N/A ND ND 08/06 0:00 24:00 ND ND ND ND 08/13 0:00 24:00 ND ND ND ND 08/21 0:00 24:00 ND ND ND ND 09/02 0:00 24:00 N/A /10 0:00 24:00 ND ND ND ND 09/18 0:00 24:00 ND ND ND Notes: ND Not detected N/A not available due to equipment malfunction The grey shaded area indicates the latest sampling results appended for this report. 1 Summary of Standards and Guidelines, to support Ontario Regulation 419/05 Air Pollution Local Air Quality, April Ontario Ambient Air Quality Criteria, April Ontario Regulation 419/05 Air Pollution Local Air Quality, Schedule 2 Standards with Half Hour Averaging Periods. 4 Texas Commission on Environmental Quality, Effects Screening Level (TCEQ_ESL), Long Term ESL, March Total Xylenes. 6 Ontario Interim Ambient Air Quality Criterion 7 Jurisdictional Screening Level (JSL) List A Screening Tool for Ontario Regulation 419: Air Pollution Local Air Quality, February Sampling Period shown as Month/day Month/day, or Month/day Hours Start Hours Finish. Data from most recent sampling event(s) shown with shaded cells. Table 3. Comparison of 24 hour Average PAHs Concentrations Against Reg. 419/03 Guideline Values Air Monitoring Results (µg/m3) Contaminants MOE Guideline :40 am :40 am :00 pm :00 pm Off Mohawk St. Off Greenwich St Off Mohawk St. Off Greenwich St (µg/m 3 ) 66 AR01 22 AR AR AR07 66 AR01 22 AR AR AR07 1 Methylnaphthalene 20 (health) Chloronaphthalene 5 (PM10)(health) 2 ND ND ND ND ND ND 2 Methylanthracene 0.05 (PM10)(health) 2 ND ND ND ND ND ND 2 Methylnaphthalene 20 (health) 2 ND Acenaphthene 10 (health) 2 ND ND Acenaphthylene 10 (health) 2 ND ND ND ND Anthracene Benzo(a)anthracene 0.05 (PM10)(health) (PM10)(health) ND ND _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

8 Tara Tran, MCIP, RPP Page 8 October 14, 2015 Table 3. Comparison of 24 hour Average PAHs Concentrations Against Reg. 419/03 Guideline Values Air Monitoring Results (µg/m3) Contaminants MOE Guideline :40 am :40 am :00 pm :00 pm Off Mohawk St. Off Greenwich St Off Mohawk St. Off Greenwich St (µg/m 3 ) 66 AR01 22 AR AR AR07 66 AR01 22 AR AR AR07 Benzo(a)pyrene (health) 1 ND ND Benzo(b)fluoranthene Benzo(e)pyrene Benzo(g,h,i)perylene Benzo(k)fluoranthene 0.05 (PM10)(health) (PM10)(health) (PM10)(health) (PM10)(health) 2 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND Biphenyl 60 (Odour)(1 hr) ND ND ND ND ND Chrysene Fluoranthene 0.05 (PM10)(health) (PM10)(health) 2 ND Fluorene 1 (PM10)(health) Indeno(1,2,3 cd)pyrene 0.05 (PM10)(health) 2 ND ND Naphthalene 22.5 (health) Phenanthrene 0.8 (health) Pyrene 0.05 (PM10)(health) Tetralin 303 (health) 2 ND ND ND ND ND ND Notes: ND Not detected Not Available 1 Summary of Standards and Guidelines, to support Ontario Regulation 419/05 Air Pollution Local Air Quality, April Texas Commission on Environmental Quality, Effects Screening Level (TCEQ_ESL), Long Term ESL, March Closure We trust the information included with this letter to be complete and in order. If the City of Brantford or MOECC have any outstanding concerns further to the work completed and the results obtained, please do not hesitate to contact the undersigned. 5. References Ministry of the Environment (MOE), Operations Manual for Air Quality Monitoring in Ontario. March. USEPA, Method 6010C Revision 3, Inductively Coupled Plasma Atomic Emission Spectroscopy. February _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

9 Tara Tran, MCIP, RPP Page 9 October 14, 2015 Ministry of the Environment (MOE) Summary of Standards and Guidelines to support Ontario Regulation 419: Air Pollution Local Air Quality. April. Ministry of the Environment (MOE) Ontario s Ambient Air Quality Criteria, April. Regards, CH2M HILL Canada Limited Ed Taves, M.Sc. Project Manager Darryl Chartrand, Ph.D. Principal Technologist Attachments: Copy: 1, Site Plan Monitoring Locations 2, Windrose Data for Most Recent Sampling Events Only (September 10 (PM10), 17(PM10), 17/18 (PAH), and 24/25 (PAH), 2015) 3, Certificates of Analyses Data for Most Recent Sampling Events Only Jennifer Volpato, MOECC, Guelph Stacey Tormey, MOECC, Guelph _EN KWO CH2M HILL Canada Limited COMPANY PROPRIETARY

10 Attachment 1 Site Plan

11 Brantford Site, VOC/PM 10 Monitoring Station Locations

12 Attachment 2 Windrose

13 WIND ROSE PLOT: Wind Rose - September 10-11, 2015 GMB Site - Brantford DISPLAY: Wind Speed Direction (blowing from) NORTH WEST EAST WIND SPEED (m/s) >= SOUTH Calms: 3.45 COMMENTS: DATA PERIOD: Start Date: 9/10/ :00 End Date: 9/11/ :00 COMPANY NAME: Ch2M HILL MODELER: Channy Shen CALM WINDS: 3.45 TOTAL COUNT: 28 hrs. AVG. WIND SPEED: 1.84 m/s DATE: 9/21/2015 PROJECT NO.: WRPLOT View - Lakes Environmental Software

14 WIND ROSE PLOT: Wind Rose - September 17-18, 2015 GMB Site - Brantford DISPLAY: Wind Speed Direction (blowing from) NORTH WEST EAST WIND SPEED (m/s) >= SOUTH Calms: 6.74 COMMENTS: DATA PERIOD: Start Date: 9/17/ :00 End Date: 9/18/ :00 COMPANY NAME: Ch2M HILL MODELER: Channy Shen CALM WINDS: 6.74 TOTAL COUNT: 28 hrs. AVG. WIND SPEED: 0.83 m/s DATE: 9/24/2015 PROJECT NO.: WRPLOT View - Lakes Environmental Software

15 WIND ROSE PLOT: Wind Rose - September 17-18, 2015 GMB Site - Brantford DISPLAY: Wind Speed Direction (blowing from) NORTH WEST EAST WIND SPEED (m/s) >= SOUTH Calms: 6.74 COMMENTS: DATA PERIOD: Start Date: 9/17/ :00 End Date: 9/18/ :00 COMPANY NAME: Ch2M HILL MODELER: Channy Shen CALM WINDS: 6.74 TOTAL COUNT: 28 hrs. AVG. WIND SPEED: 0.83 m/s DATE: 9/24/2015 PROJECT NO.: WRPLOT View - Lakes Environmental Software

16 WIND ROSE PLOT: Wind Rose - September 24-25, 2015 GMB Site - Brantford DISPLAY: Wind Speed Direction (blowing from) NORTH WEST EAST WIND SPEED (m/s) >= SOUTH Calms: 0.00 COMMENTS: DATA PERIOD: Start Date: 9/24/ :00 End Date: 9/25/ :00 COMPANY NAME: Ch2M HILL MODELER: Channy Shen CALM WINDS: 0.00 TOTAL COUNT: 27 hrs. AVG. WIND SPEED: 1.96 m/s DATE: 10/8/2015 PROJECT NO.: WRPLOT View - Lakes Environmental Software

17 Attachment 3 Certificate of Analyses

18 Your Project #: Site Location: GREENWICH MOHAWK Your C.O.C. #: Attention: Greenwich Mohawk Report Dist CH2M Hill Canada Ltd North York - Bedford Client 245 Consumers Rd Suite 401 Toronto, ON M2J 5B6 Report Date: 2015/10/05 Report #: R Version: 1 CERTIFICATE OF ANALYSIS MAXXAM JOB #: B5J0792 Received: 2015/09/21, 12:45 Sample Matrix: PUF AND FILTER # Samples Received: 4 Date Date Method Analyses Quantity Extracted Analyzed Laboratory Method Reference PAH's in Air (CARB429mod) /09/ /10/01 BRL SOP CARB429/ARBM1/M2 m Reference Method suffix m indicates test methods incorporate validated modifications from specific reference methods to improve performance. * RPDs calculated using raw data. The rounding of final results may result in the apparent difference. Encryption Key Please direct all questions regarding this Certificate of Analysis to your Project Manager. Theresa Stephenson, Project Manager TStephenson@maxxam.ca Phone# (5) ==================================================================== Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page. Total cover pages: 1 Page 1 of 7

19 CH2M Hill Canada Ltd Maxxam Job #: B5J0792 Client Project #: Report Date: 2015/10/05 Site Location: GREENWICH MOHAWK Sampler Initials: CK SEMI-VOLATILE ORGANICS BY GC-MS (PUF AND FILTER) Maxxam ID BAD729 BAD730 BAD731 BAD732 Sampling Date 2015/09/ /09/ /09/ /09/17 10:30 10:40 10:55 10:45 COC Number Units 66-AR AR AR AR RDL QC Batch Semivolatile Organics 1-Methylnaphthalene Methylphenanthrene Chloronaphthalene ND ND Methylanthracene ND ND ND Methylnaphthalene ND Methylcholanthrene ND ND ND ND ,12-Dimethylbenzo(a)anthracene ND ND ND ND ,10-Dimethylanthracene ND ND ND ND Acenaphthene ND ND Acenaphthylene ND ND Anthracene Benzo(a)anthracene ND ND Benzo(a)fluorene ND ND 0.18 ND Benzo(a)pyrene ND ND Benzo(b)Anthracene ND ND ND ND Benzo(b)fluoranthene ND Benzo(b)fluorene ND ND ND ND Benzo(e)pyrene ND ND Benzo(g,h,i)perylene ND Benzo(k)fluoranthene ND ND ND Biphenyl ND ND Chrysene ND Coronene ND ND ND ND Dibenz(a,h)anthracene ND ND ND ND Dibenzo(a,c) anthracene + Picene ND ND ND ND Dibenzo(a,e)pyrene ND ND ND ND Fluoranthene Fluorene Indeno(1,2,3-cd)pyrene ND ND m-terphenyl ND ND ND ND Naphthalene ND = Not detected RDL = Reportable Detection Limit QC Batch = Quality Control Batch Page 2 of 7

20 CH2M Hill Canada Ltd Maxxam Job #: B5J0792 Client Project #: Report Date: 2015/10/05 Site Location: GREENWICH MOHAWK Sampler Initials: CK SEMI-VOLATILE ORGANICS BY GC-MS (PUF AND FILTER) Maxxam ID BAD729 BAD730 BAD731 BAD732 Sampling Date 2015/09/ /09/ /09/ /09/17 10:30 10:40 10:55 10:45 COC Number Units 66-AR AR AR AR RDL QC Batch o-terphenyl ND ND ND ND Perylene ND ND ND ND Phenanthrene p-terphenyl ND ND ND ND Pyrene Quinoline ND ND ND ND Tetralin ND ND ND Triphenylene ND ND ND ND Surrogate Recovery () D10-2-Methylnaphthalene D10-Fluoranthene D10-Fluorene (FS) 6.6 (1) 6.2 (1) 47 (1) 31 (1) D10-Phenanthrene D12-Benzo(a)anthracene D12-Benzo(a)pyrene D12-Benzo(b)fluoranthene D12-Benzo(ghi)perylene D12-Benzo(k)fluoranthene D12-Chrysene D12-Indeno(1,2,3-cd)pyrene D12-Perylene D14-Dibenzo(a,h)anthracene D14-Terphenyl (FS) D8-Acenaphthylene D8-Naphthalene 48 (1) ND = Not detected RDL = Reportable Detection Limit QC Batch = Quality Control Batch ( 1 ) Recovery or RPD for this parameter is outside control limits. The overall quality control for this analysis meets acceptability criteria. Page 3 of 7

21 CH2M Hill Canada Ltd Maxxam Job #: B5J0792 Client Project #: Report Date: 2015/10/05 Site Location: GREENWICH MOHAWK Sampler Initials: CK GENERAL COMMENTS Sample BAD729-01: Low d10-fluorene field spike recovery. Suspect sample matrix as cause due to acceptable recovery of d14-terphenyl field spike. Low recovery for D8-Naphthalene Sample spike. Sample spike. Sample spike. BAD730-01: Low d10-fluorene field spike recovery. Suspect sample matrix as cause due to acceptable recovery of d14-terphenyl field BAD731-01: Low d10-fluorene field spike recovery. Suspect sample matrix as cause due to acceptable recovery of d14-terphenyl field BAD732-01: Low d10-fluorene field spike recovery. Suspect sample matrix as cause due to acceptable recovery of d14-terphenyl field Results relate only to the items tested. Page 4 of 7

22 Quality Assurance Report Maxxam Job Number: GB5J0792 CH2M Hill Canada Ltd Attention: Greenwich Mohawk Report Dist Client Project #: P.O. #: Site Location: GREENWICH MOHAWK QA/QC Date Batch Analyzed Num Init QC Type Parameter yyyy/mm/dd Value Recovery Units QC Limits LTO Spiked Blank D10-2-Methylnaphthalene 2015/10/ D10-Fluoranthene 2015/10/ D10-Phenanthrene 2015/10/ D12-Benzo(a)anthracene 2015/10/ D12-Benzo(a)pyrene 2015/10/ D12-Benzo(b)fluoranthene 2015/10/ D12-Benzo(ghi)perylene 2015/10/ D12-Benzo(k)fluoranthene 2015/10/ D12-Chrysene 2015/10/ D12-Indeno(1,2,3-cd)pyrene 2015/10/ D12-Perylene 2015/10/ D14-Dibenzo(a,h)anthracene 2015/10/ D8-Acenaphthylene 2015/10/ D8-Naphthalene 2015/10/ Acenaphthene 2015/10/ RPD Acenaphthene 2015/10/ Spiked Blank Acenaphthylene 2015/10/ RPD Acenaphthylene 2015/10/ Spiked Blank Anthracene 2015/10/ RPD Anthracene 2015/10/ Spiked Blank Benzo(a)anthracene 2015/10/ RPD Benzo(a)anthracene 2015/10/ Spiked Blank Benzo(a)pyrene 2015/10/ RPD Benzo(a)pyrene 2015/10/ Spiked Blank Benzo(b)fluoranthene 2015/10/ RPD Benzo(b)fluoranthene 2015/10/ Spiked Blank Benzo(g,h,i)perylene 2015/10/ RPD Benzo(g,h,i)perylene 2015/10/ Spiked Blank Benzo(k)fluoranthene 2015/10/ RPD Benzo(k)fluoranthene 2015/10/ Spiked Blank Chrysene 2015/10/ RPD Chrysene 2015/10/ Spiked Blank Dibenz(a,h)anthracene 2015/10/ RPD Dibenz(a,h)anthracene 2015/10/ Spiked Blank Fluoranthene 2015/10/ RPD Fluoranthene 2015/10/ Spiked Blank Fluorene 2015/10/ RPD Fluorene 2015/10/ Spiked Blank Indeno(1,2,3-cd)pyrene 2015/10/ RPD Indeno(1,2,3-cd)pyrene 2015/10/ Spiked Blank Naphthalene 2015/10/ RPD Naphthalene 2015/10/ Spiked Blank Phenanthrene 2015/10/ RPD Phenanthrene 2015/10/ Spiked Blank Pyrene 2015/10/ RPD Pyrene 2015/10/ Method Blank D10-2-Methylnaphthalene 2015/10/ D10-Fluoranthene 2015/10/ D10-Phenanthrene 2015/10/ D12-Benzo(a)anthracene 2015/10/ D12-Benzo(a)pyrene 2015/10/ D12-Benzo(b)fluoranthene 2015/10/ D12-Benzo(ghi)perylene 2015/10/ D12-Benzo(k)fluoranthene 2015/10/ D12-Chrysene 2015/10/ Page 5 of 7

23 Quality Assurance Report (Continued) Maxxam Job Number: GB5J0792 CH2M Hill Canada Ltd Attention: Greenwich Mohawk Report Dist Client Project #: P.O. #: Site Location: GREENWICH MOHAWK QA/QC Date Batch Analyzed Num Init QC Type Parameter yyyy/mm/dd Value Recovery Units QC Limits LTO Method Blank D12-Indeno(1,2,3-cd)pyrene 2015/10/ D12-Perylene 2015/10/ D14-Dibenzo(a,h)anthracene 2015/10/ D8-Acenaphthylene 2015/10/ D8-Naphthalene 2015/10/ Methylnaphthalene 2015/10/01 ND, RDL= 1-Methylphenanthrene 2015/10/01 ND, RDL= 2-Chloronaphthalene 2015/10/01 ND, RDL= 2-Methylanthracene 2015/10/01 ND, RDL= 2-Methylnaphthalene 2015/10/01 ND, RDL= 3-Methylcholanthrene 2015/10/01 ND, RDL=2.0 7,12-Dimethylbenzo(a)anthracene 2015/10/01 ND, RDL= 9,10-Dimethylanthracene 2015/10/01 ND, RDL=0.40 Acenaphthene 2015/10/01 ND, RDL=0.050 Acenaphthylene 2015/10/01 ND, RDL=0.050 Anthracene 2015/10/01 ND, RDL=0.050 Benzo(a)anthracene 2015/10/01 ND, RDL=0.050 Benzo(a)fluorene 2015/10/01 ND, RDL= Benzo(a)pyrene 2015/10/01 ND, RDL=0.050 Benzo(b)Anthracene 2015/10/01 ND, RDL= Benzo(b)fluoranthene 2015/10/01 ND, RDL=0.050 Benzo(b)fluorene 2015/10/01 ND, RDL= Benzo(e)pyrene 2015/10/01 ND, RDL= Benzo(g,h,i)perylene 2015/10/01 ND, RDL=0.050 Benzo(k)fluoranthene 2015/10/01 ND, RDL=0.050 Biphenyl 2015/10/01 ND, RDL= Chrysene 2015/10/01 ND, RDL=0.050 Coronene 2015/10/01 ND, RDL= Dibenz(a,h)anthracene 2015/10/01 ND, RDL=0.050 Dibenzo(a,c) anthracene + Picene 2015/10/01 ND, RDL= Dibenzo(a,e)pyrene 2015/10/01 ND, RDL=0.20 Fluoranthene 2015/10/01 ND, RDL=0.050 Fluorene 2015/10/01 ND, RDL=0.050 Indeno(1,2,3-cd)pyrene 2015/10/01 ND, RDL=0.050 m-terphenyl 2015/10/01 ND, RDL= Naphthalene 2015/10/01 ND, RDL=0.072 o-terphenyl 2015/10/01 ND, RDL= Perylene 2015/10/01 ND, RDL= Phenanthrene 2015/10/01 ND, RDL=0.050 p-terphenyl 2015/10/01 ND, RDL= Pyrene 2015/10/01 ND, RDL=0.050 Quinoline 2015/10/01 ND, RDL=0.40 Tetralin 2015/10/01 ND, RDL= Triphenylene 2015/10/01 ND, RDL= Duplicate: Paired analysis of a separate portion of the same sample. Used to evaluate the variance in the measurement. Spiked Blank: A blank matrix sample to which a known amount of the analyte, usually from a second source, has been added. Used to evaluate method accuracy. Method Blank: A blank matrix containing all reagents used in the analytical procedure. Used to identify laboratory contamination. Surrogate: A pure or isotopically labeled compound whose behavior mirrors the analytes of interest. Used to evaluate extraction efficiency. Page 6 of 7

24 Validation Signature Page Maxxam Job #: B5J0792 The analytical data and all QC contained in this report were reviewed and validated by the following individual(s). Karen Nicol, Supervisor, Semi-Volatiles ==================================================================== Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page. Page 7 of 7

25 Attention:Greenwich Mohawk Report Dist CH2M Hill Canada Limited 72 Victoria St Suite 300 Kitchener, ON N2G 4Y9 Your Project #: Site Location: GREENWICH MOHAWK Your C.O.C. #: Report Date: 2015/10/05 Report #: R Version: 1 - Final MAXXAM JOB #: B5J6374 Received: 2015/09/28, 09:04 Sample Matrix: PUF AND FILTER # Samples Received: 4 Analyses PAH's in Air (CARB429mod) CERTIFICATE OF ANALYSIS Date Quantity Extracted 4 Date Analyzed Laboratory Method 2015/09/30 BRL SOP Reference CARB429/ARBM1/M2 m Reference Method suffix m indicates test methods incorporate validated modifications from specific reference methods to improve performance. * RPDs calculated using raw data. The rounding of final results may result in the apparent difference. Encryption Key Please direct all questions regarding this Certificate of Analysis to your Project Manager. Theresa Stephenson, Project Manager TStephenson@maxxam.ca Phone# (5) ==================================================================== Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page. Total Cover Pages : 1 Page 1 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

26 Maxxam Job #: B5J6374 Report Date: 2015/10/05 CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK SEMI-VOLATILE ORGANICS BY GC-MS (PUF AND FILTER) Maxxam ID Sampling Date COC Number UNITS BBG /09/24 13: AR BBG /09/24 13: AR BBG6 2015/09/24 13: AR BBG /09/24 13: AR RDL QC Batch Semivolatile Organics 1-Methylnaphthalene 1-Methylphenanthrene 2-Chloronaphthalene 2-Methylanthracene 2-Methylnaphthalene 3-Methylcholanthrene 7,12-Dimethylbenzo(a)anthracene 9,10-Dimethylanthracene Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)fluorene Benzo(a)pyrene Benzo(b)Anthracene Benzo(b)fluoranthene Benzo(b)fluorene Benzo(e)pyrene Benzo(g,h,i)perylene Benzo(k)fluoranthene Biphenyl Chrysene Coronene Dibenz(a,h)anthracene Dibenzo(a,c) anthracene + Picene Dibenzo(a,e)pyrene Fluoranthene Fluorene Indeno(1,2,3-cd)pyrene m-terphenyl Naphthalene o-terphenyl Perylene RDL = Reportable Detection Limit QC Batch = Quality Control Batch <2.0 < < <2.0 < < <2.0 < < <2.0 < < Page 2 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

27 Maxxam Job #: B5J6374 Report Date: 2015/10/05 CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK SEMI-VOLATILE ORGANICS BY GC-MS (PUF AND FILTER) Maxxam ID Sampling Date COC Number Phenanthrene p-terphenyl Pyrene Quinoline Tetralin Triphenylene Surrogate Recovery () D10-2-Methylnaphthalene D10-Fluoranthene D10-Fluorene (FS) D10-Phenanthrene D12-Benzo(a)anthracene D12-Benzo(a)pyrene D12-Benzo(b)fluoranthene D12-Benzo(ghi)perylene D12-Benzo(k)fluoranthene D12-Chrysene D12-Indeno(1,2,3-cd)pyrene D12-Perylene D14-Dibenzo(a,h)anthracene D14-Terphenyl (FS) D8-Acenaphthylene D8-Naphthalene UNITS BBG /09/24 13: AR < (1) BBG /09/24 13:19 RDL = Reportable Detection Limit QC Batch = Quality Control Batch N/A = Not Applicable (1) Recovery or RPD for this parameter is outside control limits. The overall quality control for this analysis meets acceptability criteria AR < (1) BBG6 2015/09/24 13: AR < (1) BBG /09/24 13: AR < (1) RDL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A QC Batch Page 3 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

28 Maxxam Job #: B5J6374 Report Date: 2015/10/05 CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK GENERAL COMMENTS Results relate only to the items tested. Page 4 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

29 Maxxam Job #: B5J6374 Report Date: 2015/10/05 QUALITY ASSURANCE REPORT CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK QC Batch Parameter Date SPIKED BLANK Recovery QC Limits Method Blank Value UNITS RPD Value () QC Limits D10-2-Methylnaphthalene D10-Fluoranthene D10-Phenanthrene D12-Benzo(a)anthracene D12-Benzo(a)pyrene D12-Benzo(b)fluoranthene D12-Benzo(ghi)perylene D12-Benzo(k)fluoranthene D12-Chrysene D12-Indeno(1,2,3-cd)pyrene D12-Perylene D14-Dibenzo(a,h)anthracene D8-Acenaphthylene D8-Naphthalene 1-Methylnaphthalene 1-Methylphenanthrene 2-Chloronaphthalene 2-Methylanthracene 2-Methylnaphthalene 3-Methylcholanthrene 7,12-Dimethylbenzo(a)anthracene 9,10-Dimethylanthracene Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)fluorene Benzo(a)pyrene Benzo(b)Anthracene Benzo(b)fluoranthene Benzo(b)fluorene <2.0 < Page 5 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

30 Maxxam Job #: B5J6374 Report Date: 2015/10/05 QUALITY ASSURANCE REPORT(CONT'D) CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK SPIKED BLANK Method Blank QC Batch Parameter Date Recovery QC Limits Value UNITS Benzo(e)pyrene Benzo(g,h,i)perylene Benzo(k)fluoranthene Biphenyl Chrysene Coronene Dibenz(a,h)anthracene Dibenzo(a,c) anthracene + Picene Dibenzo(a,e)pyrene <0.20 Fluoranthene Fluorene Indeno(1,2,3-cd)pyrene m-terphenyl Naphthalene <0.072 o-terphenyl Perylene Phenanthrene p-terphenyl Pyrene Quinoline <0.40 Tetralin Triphenylene Duplicate: Paired analysis of a separate portion of the same sample. Used to evaluate the variance in the measurement. Spiked Blank: A blank matrix sample to which a known amount of the analyte, usually from a second source, has been added. Used to evaluate method accuracy. Method Blank: A blank matrix containing all reagents used in the analytical procedure. Used to identify laboratory contamination. Surrogate: A pure or isotopically labeled compound whose behavior mirrors the analytes of interest. Used to evaluate extraction efficiency. RPD Value () QC Limits Page 6 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

31 Maxxam Job #: B5J6374 Report Date: 2015/10/05 CH2M Hill Canada Limited Client Project #: Site Location: GREENWICH MOHAWK Sampler Initials: CK VALIDATION SIGNATURE PAGE The analytical data and all QC contained in this report were reviewed and validated by the following individual(s). Karen Nicol, Supervisor, Semi-Volatiles Maxxam has procedures in place to guard against improper use of the electronic signature and have the required "signatories", as per section of ISO/IEC 17025:2005(E), signing the reports. For Service Group specific validation please refer to the Validation Signature Page. Page 7 of 8 Maxxam Analytics International Corporation o/a Maxxam Analytics 6740 Campobello Road, Mississaa, Ontario, L5N 2L8 Tel: (5) Toll-Free: Fax: (5)

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