APPENDIX 15 OCF Meteorological Data and Process Data (8 pages)

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3 APPENDIX 15 OCF Meteorological Data and Process Data (8 pages) AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Summer, 2015, Report # Appendix 15

4 OCF Meteorological Data Receptor Tested Date and Time Wind Direction from North Wind Speed (m/s) R Aug-04 15:40: Aug-04 15:41: Aug-04 15:42: Aug-04 15:43: Aug-04 15:44: Aug-04 15:45: Aug-04 15:46: Aug-04 15:47: Aug-04 15:48: Aug-04 15:49: Aug-04 15:50: Aug-04 15:51: Aug-04 15:52: Aug-04 15:53: Aug-04 15:54: Aug-04 15:55: R Aug-06 13:45: Aug-06 13:46: Aug-06 13:47: Aug-06 13:48: Aug-06 13:49: Aug-06 13:50: Aug-06 13:51: Aug-06 13:52: Aug-06 13:53: Aug-06 13:54: Aug-06 13:55: Aug-06 13:56: Aug-06 13:57: Aug-06 13:58: Aug-06 13:59: Aug-06 14:00: R Aug-17 14:20: Aug-17 14:21: Aug-17 14:22: Aug-17 14:23: Aug-17 14:24: Aug-17 14:25: Aug-17 14:26: Aug-17 14:27: Aug-17 14:28: Aug-17 14:29: Aug-17 14:30: Aug-17 14:31: Aug-17 14:32: Aug-17 14:33: Aug-17 14:34: Aug-17 14:35:

5 OCF Meteorological Data Receptor Tested Date and Time Wind Direction from North Wind Speed (m/s) R Aug-19 13:25: Aug-19 13:26: Aug-19 13:27: Aug-19 13:28: Aug-19 13:29: Aug-19 13:30: Aug-19 13:31: Aug-19 13:32: Aug-19 13:33: Aug-19 13:34: Aug-19 13:35: Aug-19 13:36: Aug-19 13:37: Aug-19 13:38: Aug-19 13:39: Aug-19 13:40: R35 Sub Sep-01 14:05: Sep-01 14:06: Sep-01 14:07: Sep-01 14:08: Sep-01 14:09: Sep-01 14:10: Sep-01 14:11: Sep-01 14:12: Sep-01 14:13: Sep-01 14:14: Sep-01 14:15: Sep-01 14:16: Sep-01 14:17: Sep-01 14:18: Sep-01 14:19: Sep-01 14:20: R79 Sub Sep-02 13:40: Sep-02 13:41: Sep-02 13:42: Sep-02 13:43: Sep-02 13:44: Sep-02 13:45: Sep-02 13:46: Sep-02 13:47: Sep-02 13:48: Sep-02 13:49: Sep-02 13:50: Sep-02 13:51: Sep-02 13:52: Sep-02 13:53: Sep-02 13:54: Sep-02 13:55:

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12 APPENDIX 16 Receptor Meteorological Data (12 pages) AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Summer, 2015, Report # Appendix 16

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25 APPENDIX 17 Pitot Tube and Dry Gas Meter Calibration Data (5 pages) AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Summer, 2015, Report # Appendix 17

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31 APPENDIX 18 Odour Panelist Screening Data and Olfactometer Calibration Data (4 pages) AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Summer, 2015, Report # Appendix 18

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36 Report No Report: AECOM Canada Odour Testing Program at the York Region Southeast Collector (SeC) Trunk Sewer Odour Control Facility (OCF) Phase 1b, Autumn, 2015 Date: January 29, 2016

37 Report: AECOM Canada Odour Testing Program at the York Region Southeast Collector (SeC) Trunk Sewer Odour Control Facility (OCF) Phase 1b, Autumn, 2015 Submitted to: Prepared by: Alex Carciumaru, P.Eng. Manager, Air Quality Engineering Environment AECOM 105 Commerce Valley Dr. W., Markham, Ontario L3T 7W3 Direct: (905) Cell: (416) Stephen Thorndyke Principal, Odour Assessment/Analytical Services ORTECH Consulting Inc. 804 Southdown Rd., Mississauga, Ontario L5J 2Y4 Tel: (905) , Ext Report No.: pages, 18 Appendices Revision History Version Date Summary Changes/Purpose of Revision 1 December 22, 2015 Draft 2 January 29, 2016 Administrative edits NOTICE: This Report was prepared by ORTECH Consulting Inc. (ORTECH) solely for the Client identified above and is to be used exclusively for the purposes set out in the Pre-Test Plan. The material in this Pre-Test Plan reflects the judgment of ORTECH based on information available to them at the time of preparation. Unless manifestly incorrect, ORTECH assumes information provided by others is accurate. Changed conditions or information occurring or becoming known after the date of this Pre-Test Plan could affect the results and conclusions presented. Unless otherwise required by law or regulation, this Pre-Test Plan shall not be shared with any Third Party without the express written consent of ORTECH. ORTECH accepts no responsibility for damages, if any, suffered by any Third Party which makes use of the results and conclusions presented in this Pre-Test Plan. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 2

38 Table of Contents 1. INTRODUCTION TEST PROGRAM SAMPLING AND MEASUREMENT LOCATIONS TEST METHODOLOGY Odour Sampling Odour Panel Evaluation Total Reduced Sulphur Compound Sampling Total Reduced Sulphur Compound Analysis Ammonia Sampling Ammonia Analysis Moisture Measurements Volumetric Flow Rate Measurements Hydrogen Sulphide Measurements TEST SCHEDULE TEST RESULTS Odour Detection Threshold Values and Odour Complaint Threshold Values Odour Sensory Properties OCF Stack Moisture Content OCF Stack Volumetric Flow Rate OCF Stack Odour Emission Rates Hydrogen Sulphide Concentrations Total Reduced Sulphur Compound Concentrations and OCF Stack Emission Rates Ammonia Concentrations and OCF Stack Emission Rates METEOROLOGICAL DATA QUALITY CONTROL CONCLUSIONS Page Figure 1 Odour Dilution Sampler Figure 2 Odour Lung Sampler Figure 3 ORTECH Olfactometer Figure 4 Ammonia Sampler AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 3

39 Table of Contents Table 1 OCF Stack Gas ODTV Table 2 OCF Stack Gas OCTV Table 3 Ambient Air Odour Intensity, Hedonic Tone and Character Table 4 OCF Stack Gas Moisture Content Table 5 OCF Stack Gas Volumetric Flow Rates Table 6 OCF Stack Gas Odour Emission Rates Table 7 OCF Stack Gas Total Reduced Sulphur Compound Concentrations Table 8 OCF Gas Stack Total Reduced Sulphur Compound Concentrations Table 9 Receptor Total Reduced Sulphur Compound Concentrations Table 10 Receptor Total Reduced Sulphur Compound Concentrations Table 11 Upwind Location Total Reduced Sulphur Compound Concentrations Table 12 Upwind Location Total Reduced Sulphur Compound Concentrations Table 13 OCF Stack Gas Total Reduced Sulphur Compound Emission Rates Table 14 OCF Stack Gas Ammonia Test Gas Volume Sampled Table 15 Receptor Ammonia Test Gas Volume Sampled Table 16 Upwind Location Ammonia Test Gas Volume Sampled Table 17 OCF Stack Gas Ammonia Concentrations and Emission Rates Table 18 Receptor Ammonia Concentrations Table 19 Upwind Location Ammonia Concentrations APPENDIX 1 Approved Final Pre-Test Plan APPENDIX 2 York Region Summary of the Sampling Program APPENDIX 3 OCF Stack Diagram APPENDIX 4 OCF Photographs APPENDIX 5 Sensitive Receptor and Upwind Locations APPENDIX 6 MOECC Approval for Modified Odour Sampling and Ammonia Analysis Procedures APPENDIX 7 Odour, Ammonia and Reduced Sulphur Compound Sampling Field Data APPENDIX 8 OCF Stack Olfactometer Calculations APPENDIX 9 Ambient Air Odour Intensity, Hedonic Tone and Character Data APPENDIX 10 OCF Stack Gas Moisture Content Field Data APPENDIX 11 OCF Stack Gas Moisture Content Calculations APPENDIX 12 OCF Stack Volumetric Flow Rate Field Data APPENDIX 13 OCF Stack Volumetric Flow Rate Calculations APPENDIX 14 Buttonville Municipal Airport Meteorological Data APPENDIX 15 OCF Meteorological Data APPENDIX 16 Receptor Meteorological Data APPENDIX 17 Pitot Tube and Dry Gas Meter Calibration Data APPENDIX 18 Odour Panelist Screening Data and Olfactometer Calibration Data Page AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 4

40 1. INTRODUCTION ORTECH Environmental (ORTECH) was retained by AECOM Canada to conduct odour emission testing at the new York Region Southeast Collector (SeC) Trunk Sewer Odour Control Facility (OCF) stack, together with a concurrent ambient odour testing program at six selected off-site sensitive receptors near the facility and at the corresponding upwind locations for these receptors. In addition, testing was to be conducted for total reduced sulphur compounds and ammonia at the OCF stack, the six receptors and the six upwind locations. The purpose of the emission testing and the ambient testing programs is to assess the effectiveness of the new OCF. The OCF treats emissions of odorous substances from the new SeC Trunk Sewer. Construction of the OCF was recently completed. The purpose of the OCF is to remove odours from the SeC by a three-stage treatment system installation consisting of a bioscrubber, a biofilter and a carbon scrubber, and to reduce the potential for fugitive odour emissions from the trunk sewer by maintaining a negative pressure inside the trunk sewer headspace. The odorous air is extracted from the trunk sewer via fans from the Air Handling Facilities (AHF) under negative pressure to the OCF for treatment. The treated air from the OCF is released to the atmosphere through the new OCF stack. Using dispersion modelling, off-site odour concentrations will be predicted at the six identified sensitive receptors based on the odour emission data measured at the SeC OCF stack and compared with the odour concentrations measured at the same six sensitive receptors and their respective upwind locations during the ambient odour testing program. The total program is divided into three phases, Phase 1a, Phase 1b and Phase 2: Phase 1a which was completed in 2012 and 2013 during the pre-construction period for the OCF. Phase 1b which was completed in Spring, Summer and Autumn, 2015 during start-up operations for the OCF Phase 2 which will be completed between 2016 and 2020 during normal operations for the OCF. This report describes the program and test results for Phase 1b during Autumn, A final Pre-Test Plan, dated February 2, 2012, was prepared by ORTECH for the Ontario Ministry of the Environment and Climate Change (MOECC) to address the Phase 1a, Phase 1b and Phase 2 testing programs. A copy of this approved final Pre-Test Plan is provided in Appendix 1. A letter from York Region to the MOECC which summarizes their understanding of the sampling schedules for the programs, including Phase 1b, is shown in Appendix 2. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 5

41 2. TEST PROGRAM The Autumn 2015 odour testing program for Phase 1b lasted for six sessions over five non-consecutive days. For each session, odour samples were collected simultaneously at the OCF stack, at or near a downwind sensitive receptor and at a corresponding upwind location from the OCF stack or an AHF. Three odour samples, three total reduced sulphur compound and three ammonia samples were collected at each of these sources per session, for a total of nine samples per contaminant per session. Each sampling session was completed in one day with the exception of the last two sessions which were both completed on the same day. The odour samples were collected in Tedlar bags and an odour panel was used to determine odour concentrations of all samples collected. The odour panel also evaluated the sensitive receptor and upwind location samples to determine the odour intensity, hedonic tone and the character of the odour. The total reduced sulphur compound samples were collected in Tedlar bags and analyzed by gas chromatography/flame photometric detection. The ammonia samples were collected in impinger solutions which were analyzed for ammonium ion by an ion specific electrode method. For each day, the stack gas volumetric flow rate and moisture content were measured once at the new OCF stack. On the last day one moisture content and two volumetric flow rates were measured (one for each session). Meteorological data were measured and recorded on site at the sensitive receptors each time that samples were collected at these receptors. These meteorological data were supplemented by on-site data from the OCF and by data from a local Environment Canada weather station. 3. SAMPLING AND MEASUREMENT LOCATIONS Diagrams of the OCF stack are shown in Appendix 3 and photographs of the OCF, including the OCF stack, are shown in Appendix 4. Two sampling ports which were suitable for contaminant sample collection, moisture content sampling and volumetric flow rate measurements were located near the top of the stack at the same vertical height and offset by 90. The stack internal diameter at the height of the sampling ports was m. The port diameters were 10 cm, and the distances from the centre of these ports to the top of the stack and to the breeching below the ports were 0.88 m and 2.37 m, respectively. Therefore, the sampling ports were at a non-ideal location with respect to the top of the stack and the top of the breeching. The six sensitive receptors were identified as R35, R60, R65, R66, R78 and R79. Receptor R35 could not be sampled at its intended locations during a reasonable time period because of unsuitable meteorological conditions and, therefore, it was sampled at a substitute location. In this report, this location is referred to as Receptor R35 Substitute (R35 Sub.). The locations of these receptors and substitute receptors relative to the OCF and the AHFs are shown on the map in Appendix 5. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 6

42 UTM Coordinates of the actual sampling locations for the six receptors and substitute receptors are as follows: UTM Easting (m) UTM Northing (m) R R R R R R35 Sub These actual sampling locations were selected with regard to suitable access to the locations and avoiding private property where possible. Receptor R35 Sub. coordinates were similar to those for Receptor R60. UTM Coordinates of the actual upwind sampling locations for the six corresponding receptors and substitute receptors are as follows: UTM Easting (m) UTM Northing (m) R R R R R R35 Sub These upwind sampling locations, shown in Appendix 5, were selected on the basis of wind direction and accessibility to the locations. Receptor R35 Sub. upwind location coordinates were the same as those for Receptor R60. Receptor R65 and receptor R66 are located near the actual OCF and Shaft 9 AHF. Receptor R35 and Receptor R60 are located near the Shafts 6/7 AHF. Receptor R78 and Receptor R79 are located near the Shaft 4 AHF. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 7

43 4. TEST METHODOLOGY 4.1 Odour Sampling It was expected that odour samples would be collected at the OCF stack using a predilution method with a dilution sampler, shown in Figure 1. With the dilution sampler, odour samples are accurately diluted with high purity odourless nitrogen as the samples are extracted from the emission source into a Tedlar bag. The dilution sampler is normally used at emission sources which have a relatively high odour or moisture concentration. The procedure is designed to minimize the loss of odourants in the Tedlar bag by condensation of either moisture or odorous compounds and other mechanisms such as adsorption of odorous compounds in moisture droplets or on the Tedlar surface. It also minimizes the oxidation of odorous compounds by reducing the oxygen concentration in the Tedlar bag. However, on the first day of testing at the OCF stack it was perceived by ORTECH staff that the odour concentration in the OCF stack gases was too low for the odour samples to be collected using a predilution method. Therefore, for the entire 2015 program the OCF stack odour samples were collected without predilution. A memorandum from the MOECC which approves the use of odour sampling without predilution in situations when odour concentrations are too low for predilution sampling is shown in Appendix 6. Thus, odour samples were collected at the OCF stack, the receptors and the upwind locations for each session of testing using a non-predilution method with a lung sampler. With the lung sampler, odour samples are not diluted with high purity nitrogen as the samples are extracted directly from the ambient air or emission source into a Tedlar bag. The lung sampler is normally used at ambient air locations or at emission sources which have a relatively low odour and moisture concentration. A lung sampling system is shown in Figure 2. The lung sampler was a sealed container with a Tedlar bag inside and was connected to a Teflon sampling line which was inserted through a sampling port into the OCF stack for collecting the stack gas samples or secured about 1.5 m above ground for collecting the ambient samples. The container was connected to a variable speed pump. During sample collection, the pump created a vacuum in the container which drew odour sample into the Tedlar bag through the sampling line. The pump speed was adjusted so that samples were collected over a 10-minute period. Three odour samples were collected with the lung sampler at the OCF stack and each ambient sampling location per session in 40 L new Tedlar bags at a sampling rate of 3 L/min for 10 min to give a sample volume of about 30 L. Prior to collecting a test sample, the Tedlar bag was filled twice with sample to purge the bag. This sample was expelled from the Tedlar bag by squeezing the bag which, after purging, was then filled with test odour sample. The Tedlar bag samples were covered in dark garbage bags in order to prevent any photochemical reactions prior to odour panel evaluation. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 8

44 The procedures described above are based on Method ON-6: Determination of Odour Emissions from Stationary Sources of the Ontario Source Testing Code. This method is used in Ontario to measure odour emissions for compliance purposes. 4.2 Odour Panel Evaluation Odour samples were evaluated on the same day that they were collected by the dynamic dilution olfactometer at the ORTECH odour test facility. This facility is a specialized room, designed to provide an odour-free environment for accurate odour evaluations. The olfactometer is shown schematically in Figure 3. The olfactometer is a binary port system which was operated in a non-forced choice mode. The Tedlar bag sample was pressurized in a pressure vessel, and the resulting flow metered through an electronic mass flow controller at a predetermined rate. The sample was diluted with flow-controlled odourless air, and passed to the panel members through one of two sample ports. A three-way valve allowed the operator to direct the sample through either of the two ports. Each evaluation began at a high dilution level, which was lowered in a step-wise sequence by a factor of 1.41 at each step. At each dilution level, the panelists registered their responses by identifying the port at which they reliably detected the odour, if any. The range of dilution ratios for the ORTECH odour test facility is from 5,793 times to 2 times. At the initial high dilution, which was selected by the panel operator based on their assessment of the odour concentration in the Tedlar bag sample, none of the panelists could detect an odour and registered this response. As the dilution of the sample was decreased with each step, prior to presentation to the panel (equivalent to increasing the odour concentration), an odour was eventually detected by one or more of the panelists at one of the steps. With further dilution over several additional steps, all of the panelists detected an odour and registered their response. The combined responses of the panelists over these dilution steps were used to calculate the odour detection threshold value (ODTV) for the sample. The panelist responses were processed to determine the ODTV for the sample. This is done by a regression analysis of the log of the dilution level versus the probit value of the percentage of the panel members responding. The point at which statistically 50% of the panel can just detect the odour is recorded as the ODTV. The ODTV is a dilution factor and therefore has no units. For convenience, however, the ODTV may be expressed in odour units (ou). The ODTV is the primary odour parameter which is determined by the odour panel. It was also intended that the OCF stack samples would be evaluated to determine the odour complaint threshold value (OCTV) and the odour offensiveness threshold value (OFTV) which is determined in the same manner as the ODTV except that the panelists are instructed to indicate if they would complain about an odour or find it offensive at each dilution step, in addition to indicating that they could detect an odour. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 9

45 Before any evaluation began for a sample, dilution air was introduced to the panelists through the olfactometer in order to determine if there was any residual odour in the system. If there was residual odour, the olfactometer was purged until the residual odour was depleted. Eight panel members were used for all evaluations. They are drawn from a pool of people who routinely participate in this type of work. They have all been tested at least annually for odour sensitivity and are considered to be within the normal range. The procedures above were developed by ORTECH and are similar to the procedures described in European Standard EN 13725:2003: Air Quality Determination of Odour Concentration by Dynamic Olfactometry. In addition to the olfactometer evaluations, the eight panelists were requested to determine the odour intensity, hedonic tone and character directly on the ambient air Tedlar bag samples. These sensory property evaluations were done by each panelist in turn through sniffing the contents of the Tedlar bag as the bag was squeezed to expel the contents. Odour intensity was based on the following scale: 0...no odour 1...slight odour 2...moderate odour 3...strong odour 4...extreme odour Hedonic tone was based on the following scale: -3...very unpleasant -2...unpleasant -1...slightly unpleasant 0...neutral +1...slightly pleasant +2...pleasant +3...very pleasant AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 10

46 The following descriptors were provided to the panelist for them to determine which descriptor most aptly described the odour in the Tedlar bag: Rotten eggs Sewage Compost Musty Bleach Chemical Ammonia Fishy Other-specify These sensory properties were determined in turn by the panelists for each ambient air sample and the test results were aggregated for each group of triplicate samples per panelist and then for the combined panelists. 4.3 Total Reduced Sulphur Compound Sampling The total reduced sulphur compound samples were collected at the OCF stack, the receptors and the upwind locations each session of testing using a non-predilution method with a lung sampler. The sampling procedures were the same as those described above for the collection of odour samples. 4.4 Total Reduced Sulphur Compound Analysis The Tedlar bag samples were analyzed for total reduced sulphur compounds by gas chromatography (GC)/flame photometric detection (FPD) using a Chromatotec Model Chroma-S gas chromatograph with an all Teflon sample pathway consisting of a MXT5 4m column and a MXT624 30m column, a gas sampling valve (GSV) fitted with a Teflon loop and a flame photometric detector with a double flame. The resulting data were processed using VistaCHROM Model 1.47a software. All reported concentrations are in units of parts per million by volume (ppmv) at wet conditions and on a mass basis as mg/m³ at wet reference conditions. The method reference is ASTM Method D : Standard Test Method for Determination of Sulphur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatography and Flame Photometric Detection. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 11

47 The standard reference gases used to calibrate the analyzer were: Air Liquide Gas Mix Cert. Std. four components at 10 ppm (mole) respectively; hydrogen sulphide, dimethyl sulphide, dimethyl disulphide and methyl mercaptan balance nitrogen, lot LGM Air Liquide Gas Mix Cert. Std. three components at 10 ppm (mole) respectively; carbonyl sulphide, carbon disulphide and thiophene, balance nitrogen, lot PLU Air Liquide Gas Mix Cert. Std. four components at 10 ppm (mole); ethyl mercaptan, isopropyl mercaptan, n-propyl mercaptan and t-butyl mercaptan, balance nitrogen, lot PLU Ammonia Sampling The ammonia samples were collected at the OCF stack, the sensitive receptors and the upwind locations for each session of testing using an impinger method. An impinger sampling system is shown in Figure 4. The impinger sampler consisted of two midget impingers in series which were connected to a Teflon sampling line. The line was inserted through a sampling port into the OCF stack for collecting the stack gas samples or secured about 1.5 m above ground for collecting the ambient air samples. The impingers were also connected to a variable speed pump. During sample collection, the pump created a vacuum which drew gaseous sample into the impingers through the sampling line. Each impinger contained 15 ml of 0.1N sulphuric acid solution as the collection medium for ammonia in the gas sample. Three ammonia samples were collected with the impinger sampler at the OCF stack and each ambient air sampling location per session at a sampling rate of approximately 1 L/min for 60 min to give a sample volume of about 60 L. This volume was much higher during sampling at two upwind locations but this would not adversely affect the test results. Prior to collecting a test sample the impinger sampling train was checked to ensure that there were no leakages. The sampling train was leak checked again after sampling was completed. DryCal monitors were used to measure the sampling rate in triplicate at the start and finish of each ammonia test. These data were used to calculate the average sampling rate during each test. The procedures described above are based on the principles of the midget impinger method described in the method reference United States Environmental Protection Agency CTM Determination of Ammonia Emissions in Stationary Sources, except that this method was modified for the current ammonia testing program. After sampling was completed the contents of each impinger were transferred to separate amber glass bottles. The two impingers were each rinsed separately with 5 ml of 0.1N sulphuric acid solution which was added to the respective bottles so that each bottle contained 20 ml of impinger solution sample including the rinses. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 12

48 4.6 Ammonia Analysis Ammonia analyses were carried out on the first impinger solution samples. It was intended that the second impinger solution samples would be combined with the first impinger solution samples prior to analysis only if substantial amounts of ammonia were detected in the initial first impinger solution samples analyzed and, therefore, carry-over of ammonia to the second impinger solution during sampling may have occurred. The initial test results showed that there was very little ammonia detected in the first impinger solution samples so the second impinger solutions were not combined with the first impinger solutions prior to analysis for any of the samples. Ammonia analyses (as ammonium ion) were carried out using a Thermo Scientific Orion Star ph/ise benchtop meter with a ROSS Ultra ph Electrode Model 8120BNUWP and an Orion high performance ammonium ion selective electrode (ISE) Model 9512HPBNWP. MOECC approval to use this method is shown in Appendix 6. Reference Standards used for the analyses were: 1000ppm ammonium ion standard as N (Orion Part ) 0.1M ammonium ion standard (Orion Part ) Low level ammonia ph adjusting ISA solution (Orion Part ) The electrode was calibrated using a five-point direct calibration serial dilution technique. An initial standard was diluted to prepare a second standard and so forth. The standard concentrations were a factor of ten apart in concentration. ISE solution was added to all samples to adjust the ph (between ph 11 to ph 14). This ensures that all samples and standards had similar ionic strength. The ammonium ion concentration of the samples was determined by comparison to the standards. Duplicate analyses and an analysis of the 0.1N sulphuric acid solution were included in the analytical program. A reasonable detection limit for this method is 0.07 ppm by mass (70 µg/l) in the impinger solution, expressed as ammonia. Ammonia absorption from the laboratory air becomes a source of error below this value. Some of the test results were below this detection limit but they are provided in this report on the understanding that for these results there will be a significant loss of accuracy compared with the results which are above the detection limit. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 13

49 4.7 Moisture Measurements The OCF stack gas moisture content was determined based on the chilled impinger method described in Method ON-4: Determination of Moisture Content of Stack Gas of the Ontario Source Testing Code. The composition of the OCF stack gas was assumed to be moist air with other minor components. The impinger sampler consisted of four large impingers in series connected to a Teflon sampling line which was inserted through a sampling port into the OCF stack for collecting the stack gas samples. The impingers were also connected to a variable speed pump. During sample collection, the pump created a vacuum which drew stack gas sample into the impingers through the sampling line. Each of the first two impingers initially contained 100 ml of water, the third impinger was empty and the fourth impinger contained approximately 250 g of silica gel desiccant. The impingers and their contents were pre-weighed before a test commenced. The sampling rate was approximately 28 L/min and each test lasted for approximately 30 min. A calibrated dry gas meter was used to record the volume of OCF stack gas sampled during a test. At the conclusion of a test the impingers were dried on the outside and reweighed to determine the combined weight gain of the four impingers. This weight gain and the volume of gas sampled were used to determine the moisture content of the OCF stack gas. Single determinations were made for each of the five test days at the OCF stack. 4.8 Volumetric Flow Rate Measurements The volumetric flow rate at the OCF stack was measured during each test day using the pitot tube method described in Method ON-2: Determination of Stack Gas Velocity and Volumetric Flow Rate of the Ontario Source Testing Code. Pitot tube readings were obtained at 10 points along stack traverses at 90 through each of the two sampling ports, for a total of 20 points. The number of points was doubled to 20 points because of the non-ideal location of the sampling ports. These measurements included the determination of the stack gas temperature. 4.9 Hydrogen Sulphide Measurements Hydrogen sulphide concentrations were measured in each Tedlar bag odour sample collected. A portable Jerome Model 631-X hydrogen sulphide analyzer was used for this purpose. Triplicate measurements were made and the results averaged for each Tedlar bag. Measurements were also made in the ambient air at the receptors. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 14

50 5. TEST SCHEDULE Schedules for collecting samples at the OCF stack, the six sensitive receptors and the six corresponding upwind locations are shown in Appendix 7. The program lasted from November 16 to December 8, There was one test session per day for four days and two test sessions on the fifth day when the weather conditions, including the wind direction, were appropriate, except for the last day (December 8) when testing was conducted at a substitute receptor due to an inappropriate wind direction. Each combined odour and total reduced sulphur compound Tedlar bag sample was collected over a period of 10 minutes. These samples were collected at the OCF stack at the same time that the equivalent samples were collected at the sensitive receptors and upwind locations. Each impinger ammonia sample was collected over a period of 60 minutes. Radio communications were used to coordinate the sampling schedules at the receptors, upwind locations and OCF stack. On the first day of testing (April 30) for Phase 1b in Spring, 2015, it was apparent from a preliminary test at the OCF stack that the odour concentration was very low. Therefore, on all successive days of testing for Spring, Summer and Autumn, 2015, the Tedlar bag samples for odour and total reduced sulphur compound analyses were collected at the OCF stack without any predilution. The moisture sampling and volumetric flow rate measurements at the OCF stack were conducted just before or after collection of the Tedlar bag and impinger solution samples over a period of approximately 30 min for the moisture sampling and 15 min for the volumetric flow rate measurements. 6. TEST RESULTS 6.1 Odour Detection Threshold Values and Odour Complaint Threshold Values Odour detection threshold values for the odour testing at the OCF stack are shown in Table 1. Odour sampling field data are shown in Appendix 7 and detailed odour panel results are provided in Appendix 8 for the OCF stack only for the six test sessions. Similar results are not available for any of the ambient air samples since the odour concentrations for these samples were too low for them to be evaluated by the olfactometer. The results show that the geometric mean ODTV varied from ou to ou and averaged ou for the six test sessions at the OCF stack. Odour concentrations in all of the samples collected at the sensitive receptors and the upwind locations were too low for the samples to be evaluated by the odour panel using the olfactometer. However, the panelists evaluated the Tedlar bag samples directly and, for some of the Tedlar bag samples, slight odours were detected by some of the panelists which allowed determinations of the sensory odour properties by these panelists. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 15

51 Because of the low ODTV for all of the samples, the OCTV OFTV could not be determined since the determination of the OCTV and OFTV generally requires a higher odour concentration in a sample than the determination of the ODTV. However, it was possible to partially determine the OCTV for the samples and these partial results were used to project the estimated OCTV, as shown in Appendix 8 and Table 2. The results show that the estimated geometric mean OCTV varied from 24.1 ou to 48.0 ou and averaged 31.8 ou for the six test sessions at the OCF stack. 6.2 Odour Sensory Properties Odour sensory properties recorded by the eight odour panelists for direct evaluation of the ambient air samples are shown in Appendix 9 and summarized in Table 3. For the odour intensity, there was little difference between the average sensitive receptor recordings and the average upwind location recordings, as follows: Odour Intensity for the new OCF Receptor Identification Receptor Upwind Location R R R R R R35 Sub Average For the hedonic tone, there was also little difference between the average receptor recordings and the average upwind location recordings, as follows: Odour Hedonic Tone for the new OCF Receptor Identification Receptor Upwind Location R R R R R R35 Sub Average These average values for the intensity and hedonic tone include the results for panelists who could not detect an odour in one or more of the samples. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 16

52 The odour panelists, when they could detect an odour, generally described the odour character as chemical, musty and sewage, along with several other descriptors. Similar descriptors were given for both the receptor and upwind location samples, indicating that the odours did not originate from the OCF Stack or the AHF Shafts but were probably background odours in the ambient air. 6.3 OCF Stack Moisture Content OCF stack moisture contents were measured for the five test days using a chilled impinger method. Field data sheets are shown in Appendix 10 and the moisture content calculations for each day are shown in Appendix 11. The results are summarized in Table 4. The average OCF stack gas moisture content was 1.75% by volume for the five test days. The dew point temperature averaged 15.6C and varied from 14.3C to 17.0C. On December 2 and December 8, the OCF stack gases were supersaturated with moisture, as shown in Table 4 where the relative humidity exceeded 100%. After the Tedlar bag odour samples had been collected at the OCF stack, they were stored in the heated OCF building to ensure that the gas sample temperature did not decrease below the dew point temperature and, for the same reason, the samples were transported in a heated van between the OCF and the ORTECH laboratories where the samples were also kept in a heated building until they were evaluated by the odour panel. By taking these precautions to keep the Tedlar bag samples warm, no condensed moisture was observed in the samples during the period between sample collection and evaluation. 6.4 OCF Stack Volumetric Flow Rate Volumetric flow rate field data sheets and calculations are provided in Appendix 12 and Appendix 13, respectively. The results are summarized in Table 5. Results were consistent for the six test sessions. The flow rate averaged 13.6 m³/s at actual conditions and 13.8 Rm³/s at wet reference conditions (25C and 1 atmosphere). The stack gas temperature averaged 16.8C and the gas velocity averaged 11.4 m/s. 6.5 OCF Stack Odour Emission Rates Odour emission rates for the OCF stack were calculated as the product of the geometric mean ODTV and the wet reference volumetric flow rate. These calculations are shown in Table 6. The average odour emission rate for the six test sessions was 1945 ou/s. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 17

53 6.6 Hydrogen Sulphide Concentrations Analyses with the portable Jerome Model 631-X hydrogen sulphide analyzer did not detect any hydrogen sulphide in any of the Tedlar bag samples collected at the OCF stack, sensitive receptors, upwind locations or ambient air at the receptors. The detection limit was ppmv (parts per million by volume on a wet basis), although the analyzer measurements are probably imprecise below about ppmv. 6.7 Total Reduced Sulphur Compound Concentrations and OCF Stack Emission Rates Total reduced sulphur compound concentrations determined in the Tedlar bag odour samples are shown in Table 7 and Table 8 for the OCF stack, Table 9 and Table 10 for the sensitive receptors and Table 11 and Table 12 for the upwind location. Results are given for hydrogen sulphide, methyl mercaptan, dimethyl sulphide and dimethyl disulphide as ppmv and mg/rm³ (at reference conditions) on a wet basis, although six other compounds were included in the analyses. None of the ten compounds were detected in any of the samples at a detection limit of 0.01 ppmv on a wet basis. Total reduced sulphur compound emission rates are shown in Table 13 for the OCF stack only. 6.8 Ammonia Concentrations and OCF Stack Emission Rates The wet reference volumes of gas sampled during the ammonia tests at the OCF stack receptors and upwind locations are calculated in Table 14 to Table 16, respectively. The raw gas volumetric flow rates measured with the gas meters are given at 21.1C (70F). For the purpose of this report these flow rates were corrected to the reference temperature of 25C during calculation of the volumes of gas sampled. Amounts of ammonium ion detected in the impinger solutions are shown in Table 17 to Table 19, respectively. These amounts were divided by the corrected volume of gas sampled and converted into the equivalent ammonia concentrations in the gas samples. For the OCF stack only, the ammonia concentrations were multiplied by the wet reference flow rates to give the ammonia emission rates, as shown in Table 17. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 18

54 7. METEOROLOGICAL DATA Meteorological data from three separate sources are available for the OCF area while the testing program was underway, as follows: Environment Canada meteorological data for Buttonville Municipal Airport, Markham OCF meteorological data from an on-site weather station Field meteorological data collected at the sensitive receptors during the odour sampling The Buttonville Municipal Airport meteorological data for the testing days are shown in Appendix 14 and the OCF meteorological data are shown in Appendix 15. The field meteorological data were collected by ORTECH at approximately 5-minute intervals during the sample collection period at each sensitive receptor. The data, shown in Appendix 16, included ambient air temperature (C), relative humidity (%), instantaneous wind speed (km/h) and 1-minute range (km/h), wind direction and cloud cover (%). A combined air temperature and relative humidity monitor was used, together with an anemometer to measure the wind speed. The wind direction and cloud cover were estimated by the ORTECH staff. For numerous readings, the anemometer registered no wind speed but there was usually a very slight wind which enabled the wind direction to be estimated. The anemometer used reads in 1 km/h increments. 8. QUALITY CONTROL As part of the quality control for the testing program, ORTECH included the following tasks: Odour Sampling Preparation of new Tedlar bags by baking at a high temperature. The Tedlar bags were given a unique tracking number. Leak checks and the determination of background odours for the Tedlar bags. New fittings and clean Teflon tubing were used for each odour sampling source. Teflon sampling probes were secured about 1.5 m above ground for the ambient air samples. Tedlar bags were purged twice with OCF stack gases or ambient air at the sampling source before the test samples were collected. Inspections of all equipment were carried out for defects and damage before use. Detailed field log sheets were used to record the test results. The Tedlar bags were placed in black garbage bags after sample collection. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 19

55 Total Reduced Sulphur Compound Sampling The same Tedlar bag samples and sampling procedures were used for the collection of both odour and total reduced sulphur compound samples. Ammonia Sampling High purity reagent (0.1N sulphuric acid) was used for ammonia sampling. The impinger sampling trains were leak checked before and after sampling. Calibrated Drycal monitors were used to measure the sampling rates in triplicate at the start and finish of each test. At the conclusion of sampling the samples were collected in amber glass bottles. Rinsings of the impingers and connecting glassware were added to the same bottles. The sample bottles were refrigerated at the ORTECH laboratories prior to analysis. Odour Panel Analysis Odour samples were evaluated by the odour panel within 8 hours after collection, which is well within the allowed 24 hours after sample collection. The ORTECH olfactometer is calibrated regularly for the test port volumetric flow rates. The olfactometer is calibrated regularly for the dilution ratios at each evaluation step. ORTECH uses a constant ratio of between successive evaluation steps. The olfactometer is a two port system which is operated in a non-forced choice (Yes/No) mode. All panelists were screened regularly with n-butanol. New panelists are trained for olfactometry evaluations Blank air was introduced to the panel members before evaluation of any odour samples to ensure that the olfactometer had no residual background odours. The test procedures followed standard methods, including the Ontario MOECC Method ON-6 for odour sampling and European Standard EN 13725:3003 for odour panel evaluations, with some modifications. Calibration data are available on request. Total Reduced Sulphur Compound Analysis Standard certified calibration gases from Air Liquide were used. Duplicate analyses were performed. Calibration data are available on request Samples were analyzed as soon as possible after collection AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 20

56 Ammonia Analysis A calibration solution from the analyzer manufacturer (Thermo Scientific) was used. A five point calibration curve was prepared for the analyses. An impinger solution blank sample was analyzed. Several duplicate analyses were performed. Calibration data are available on request Samples were analyzed within the required holding time Moisture and Volumetric Flow Rate Measurements The dry gas meter used for determining the OCF stack gas moisture content was calibrated. Leak checks were made on the moisture train at the start and finish of each test. The pitot tube, manometer and thermocouple used to measure the OCF stack gas velocity pressures and temperature were calibrated. Local Environment Canada barometric pressure data were used in the volumetric flow rate calculations. The OCF stack gas was assumed to have the composition of air. Calibration data for the dry gas meter, pitot tube and manometer are provided in Appendix 17. Panelist screening data and olfactometer calibration data are provided in Appendix CONCLUSIONS For the Phase 1b Autumn sampling season in 2015, emission rates for odour, total reduced sulphur compounds and ammonia were measured at the new OCF stack on six sessions over five separate days. For each of those sessions ambient air odour, total reduced sulphur compound and ammonia concentrations were measured downwind at one of six selected off-site sensitive receptors near the OCF or an AHF and at a corresponding upwind location. Odour detection concentrations (expressed as ODTV) at the OCF stack, measured with an odour panel and an olfactometer, averaged ou for the six sessions. Based on partial eveluations only, the estimated odour complaint concentration (expressed as OCTV) at the OCF stack, also measured with an odour panel and an olfactometer, averaged 31.8 ou for the six sessions. The average measured wet reference volumetric flow rate at the OCF stack was 13.8 Rm 3 /s and the calculated odour emission rate, based on the ODTV, averaged 1945 ou/s. Odour concentrations in the ambient air samples collected at the receptors and upwind locations were too low for these samples to be evaluated using the olfactometer. Instead, odour sensory properties were recorded by the eight odour panelists, using direct evaluation of these samples, for odour intensity, hedonic tone and character. AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 21

57 For the odour intensity, there was very little difference between the recordings, with average intensities of 0.4 for the receptor samples and 0.4 for the upwind location samples, on a scale of 0 (no odour) to 4 (extreme odour). The hedonic tone averaged 0.0 for the receptors and 0.0 for the upwind locations on a scale of -3 (very unpleasant odour) to +3 (very pleasant odour), with 0 being a neutral odour. The character of the odours which could be detected in the ambient air samples were generally described as chemical, musty and sewage, along with several other descriptors. Similar descriptors were given for both the receptor and upwind location samples, indicating the odours did not originate from the OCF stack but were probably background odours in the ambient air. It is concluded that the results obtained during the current program demonstrate that the new SeC OCF stack had a very low odour emission rate during the six test sessions and that any odours detected at the sensitive receptors more than likely did not originate at the OCF or at the AHFs. Concentrations of total reduced sulphur compounds and ammonia in the OCF stack samples and ambient air samples collected at the receptors and upwind locations were either not detectable (total reduced sulphur compounds) or very low (ammonia). Stephen Thorndyke Principal, Odour Assessment/Analytical Services AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 22

58 Figure 1 Odour Dilution Sampler Differential Pressure Diluted Sample to Gas Bag Split Line Sample Probe Capillary Valve Eductor (Aspirator) Heated Zone Regulator Nitrogen Carbon Filter AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 23

59 Figure 2 Odour Lung Sampler Flowmeter Sample Probe Valve Pump Tedlar Bag Lung Sampler AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 24

60 Figure 3 ORTECH Olfactometer EIGHT PANELIST EVALUATION CUBICLES WITH RESPONSE BUTTONS A 2-WAY VALVE B CONTROL STATION 3-WAY VALVE }MASS FLOW CONTROLLERS FILTERED COMPRESSED AIR COMPRESSED AIR PRESSURE VESSEL TEDLAR BAG AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 25

61 Figure 4 Ammonia Sampler AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 26

62 Table 1: OCF Stack Gas ODTV Sampling Receptor Sampling Sampling Time Test Raw Field Net Coefficient Geometric Source Tested Date Start Finish No. ODTV Predilution ODTV of Mean Ratio Variation ODTV ou ou % ou OCF Stack R79 November R78 November R66 November R65 December R60 December R35 Sub. December Average ou = odour units AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 27

63 Table 2: OCF Stack Gas OCTV Sampling Receptor Sampling Sampling Time Test Raw Field Net Coefficient Geometric Source Tested Date Start Finish No. OCTV Predilution OCTV of Mean Ratio Variation OCTV ou ou % ou OCF Stack R79 November R78 November R66 November R65 December R60 December R35 Sub. December Average 31.8 ou = odour units The OCTV are all estimated since there was insufficient sample to complete the analyses AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 28

64 Table 3: Ambient Air Odour Intensity, Hedonic Tone and Character Sampling Sampling Odour Panelist No. Odour Character Source Date Property Average R79 November 16 Intensity musty Hedonic Tone bleach, chemical Upwind Intensity musty Hedonic Tone R78 November 24 Intensity chemical, sewage Hedonic Tone plastic Upwind Intensity chemical, sewage Hedonic Tone plastic R66 November 25 Intensity sewage, compost Hedonic Tone plastic Upwind Intensity sewage, compost Hedonic Tone plastic R65 December 2 Intensity chemical, sewage Hedonic Tone Upwind Intensity musty, bleach Hedonic Tone plastic R60 December 8 Intensity chemical, sewage Hedonic Tone Upwind Intensity musty, sewage Hedonic Tone chemical R35 Sub. December 8 Intensity Hedonic Tone Upwind Intensity chemical, sewage Hedonic Tone musty, compost Receptors Average Intensity 0.4 Hedonic Tone 0.0 Upwind Average Intensity 0.4 Hedonic Tone 0.0 Intensity on a scale of 0.0 to 5.0 Hedonic tone on a scale of +3.0 to -3.0 AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 29

65 Table 4: OCF Stack Gas Moisture Content Sampling Receptor Test Measurement Time Barometric Gas Temperature Molecular Moisture Content Dew Point Relative Source Tested Date Start Finish Pressure Actual Dew Point Weight Volume Mass Mass Humidity kpa C C kg/kg.mol % g/m³ g/m³ % OCF Stack R79 November 16 12:30 13: R78 November 24 11:17 11: R66 November 25 10:40 11: R65 December 2 11:12 11: R60 December 8 11:10 11: R35 Sub. December 8 11:10 11: Average AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 30

66 Table 5: OCF Stack Gas Volumetric Flow Rates Sampling Receptor Test Measurement Time Stack Gas Static Moisture Gas Actual Reference Source Tested Date Start Finish Diameter Temperature Pressure Content Velocity Flow Rate Flow Rate m C kpa % vol. m/s m³/s Rm³/s OCF Stack R79 November 16 16:15 16: R78 Novemebr 24 15:00 15: R66 Novemebr 25 14:99 14: R65 December 2 14:00 14: R60 December 8 13:25 13: R35 Sub. December 8 17:20 17: Average Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 31

67 Table 6: OCF Stack Gas Odour Emission Rates Sampling Receptor Test Geometric Reference Odour Source Tested Date Mean Flow Rate Emission ODTV Rate ou Rm³/s ou/s OCF Stack R79 November R78 November R66 November R65 December R60 December R35 Sub. December Average ou = odour units Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 32

68 Table 7: OCF Stack Gas Total Reduced Sulphur Compound Concentrations Sampling Receptor Sampling Test Sampling Period Concentration by Volume Source Tested Date No. Start Finish Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide ppmv ppmv ppmv ppmv OCF Stack R79 November :55 11:05 <0.01 <0.01 <0.01 < :15 12:25 <0.01 <0.01 <0.01 < :05 14:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R78 November :05 10:15 <0.01 <0.01 <0.01 < :10 11:20 <0.01 <0.01 <0.01 < :20 12:30 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R66 November :20 11:30 <0.01 <0.01 <0.01 < :45 12:55 <0.01 <0.01 <0.01 < :50 14:00 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R65 December :55 11:05 <0.01 <0.01 <0.01 < :00 12:10 <0.01 <0.01 <0.01 < :05 13:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R60 December :22 10:32 <0.01 <0.01 <0.01 < :27 11:37 <0.01 <0.01 <0.01 < :32 12:42 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R35 Sub. December 8 1 9:55 10:05 <0.01 <0.01 <0.01 < :00 11:10 <0.01 <0.01 <0.01 < :05 12:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 ppmv = parts per million by volume AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 33

69 Table 8: OCF Gas Stack Total Reduced Sulphur Compound Concentrations Sampling Receptor Test Reference Concentration by Mass Source Tested No. Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide mg/rm³ mg/rm³ mg/rm³ mg/rm³ OCF Stack R79 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R78 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R66 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R65 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R60 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R35 Sub. 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 34

70 Table 9: Receptor Total Reduced Sulphur Compound Concentrations Sampling Receptor Sampling Test Sampling Period Concentration by Volume Source Tested Date No. Start Finish Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide ppmv ppmv ppmv ppmv Receptors R79 November :55 11:05 <0.01 <0.01 <0.01 < :15 12:25 <0.01 <0.01 <0.01 < :05 14:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R78 November :05 10:15 <0.01 <0.01 <0.01 < :10 11:20 <0.01 <0.01 <0.01 < :20 12:30 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R66 November :20 11:30 <0.01 <0.01 <0.01 < :45 12:55 <0.01 <0.01 <0.01 < :50 14:00 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R65 December :55 11:05 <0.01 <0.01 <0.01 < :00 12:10 <0.01 <0.01 <0.01 < :05 13:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R60 December :22 10:32 <0.01 <0.01 <0.01 < :27 11:37 <0.01 <0.01 <0.01 < :32 12:42 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R35 Sub. December 8 1 9:55 10:05 <0.01 <0.01 <0.01 < :00 11:10 <0.01 <0.01 <0.01 < :05 12:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 ppmv = parts per million by volume AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 35

71 Table 10: Receptor Total Reduced Sulphur Compound Concentrations Sampling Receptor Test Reference Concentration by Mass Source Tested No. Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide mg/rm³ mg/rm³ mg/rm³ mg/rm³ Receptors R79 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R78 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R66 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R65 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R60 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R35 Sub. 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 36

72 Table 11: Upwind Location Total Reduced Sulphur Compound Concentrations Sampling Receptor Sampling Test Sampling Period Concentration by Volume Source Tested Date No. Start Finish Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide ppmv ppmv ppmv ppmv Upwind R79 November :55 11:05 <0.01 <0.01 <0.01 < :15 12:25 <0.01 <0.01 <0.01 < :05 14:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R78 November :05 10:15 <0.01 <0.01 <0.01 < :10 11:20 <0.01 <0.01 <0.01 < :20 12:30 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R66 November :20 11:30 <0.01 <0.01 <0.01 < :45 12:55 <0.01 <0.01 <0.01 < :50 14:00 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R65 December :55 11:05 <0.01 <0.01 <0.01 < :00 12:10 <0.01 <0.01 <0.01 < :05 13:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R60 December :22 10:32 <0.01 <0.01 <0.01 < :27 11:37 <0.01 <0.01 <0.01 < :32 12:42 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 R35 Sub. December 8 1 9:55 10:05 <0.01 <0.01 <0.01 < :00 11:10 <0.01 <0.01 <0.01 < :05 12:15 <0.01 <0.01 <0.01 <0.01 Average <0.01 <0.01 <0.01 <0.01 ppmv = parts per million by volume AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 37

73 Table 12: Upwind Location Total Reduced Sulphur Compound Concentrations Sampling Receptor Test Reference Concentration by Mass Source Tested No. Hydrogen Methyl Dimethyl Dimethyl Sulphide Mercaptan Sulphide Disulphide mg/rm³ mg/rm³ mg/rm³ mg/rm³ Upwind R79 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R78 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R66 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R65 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R60 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 R35 Sub. 1 <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 < <0.01 <0.02 <0.03 <0.04 Average <0.01 <0.02 <0.03 <0.04 Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 38

74 Table 13: OCF Stack Gas Total Reduced Sulphur Compound Emission Rates Sampling Receptor Test Reference Emission Rate Source Tested No. Flow Hydrogen Methyl Dimethyl Dimethyl Rate Sulphide Mercaptan Sulphide Disulphide Rm³/s mg/s mg/s mg/s mg/s OCF Stack R <0.24 <0.34 <0.44 < <0.24 <0.34 <0.44 < <0.24 <0.34 <0.44 <0.67 Average <0.24 <0.34 <0.44 <0.67 R <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 <0.54 Average <0.20 <0.28 <0.36 <0.54 R <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 <0.54 Average <0.20 <0.28 <0.36 <0.54 R <0.19 <0.27 <0.34 < <0.19 <0.27 <0.34 < <0.19 <0.27 <0.34 <0.52 Average <0.19 <0.27 <0.34 <0.52 R <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 < <0.20 <0.28 <0.36 <0.54 Average <0.20 <0.28 <0.36 <0.54 R35 Sub <0.18 <0.25 <0.33 < <0.18 <0.25 <0.33 < <0.18 <0.25 <0.33 <0.49 Average <0.18 <0.25 <0.33 <0.49 Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 39

75 Table 14: OCF Stack Gas Ammonia Test Gas Volume Sampled Sampling Receptor Sampling Test Sampling Period Sampling Sampling Rate Gas Source Tested Date No. Start Finish Time Raw Corrected Volume (21.1 C) (25.0 C) Sampled min L/min L/min L OCF Stack R79 November :25 13: :35 14: :45 15: R78 November :15 12: :25 13: :35 14: R66 November :40 11: :50 12: :00 14: R65 December :10 12: :15 13: :20 14: R60 December :00 11: :05 12: :10 13: R35 Sub. December :00 15: :05 16: :10 17: AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 40

76 Table 15: Receptor Ammonia Test Gas Volume Sampled Sampling Receptor Sampling Test Sampling Period Sampling Sampling Rate Gas Source Tested Date No. Start Finish Time Raw Corrected Volume (21.1 C) (25.0 C) Sampled min L/min L/min L Receptors R79 August :25 13: :35 14: :45 15: R78 August :15 12: :25 13: :35 14: R66 August :40 11: :50 12: :00 14: R65 August :10 12: :15 13: :20 14: R60 September :00 11: :05 12: :10 13: R35 Sub. September :00 15: :05 16: :10 17: AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 41

77 Table 16: Upwind Location Ammonia Test Gas Volume Sampled Sampling Receptor Sampling Test Sampling Period Sampling Sampling Rate Gas Source Tested Date No. Start Finish Time Raw Corrected Volume (21.1 C) (25.0 C) Sampled min L/min L/min L Upwind R79 August :25 13: :35 14: :45 15: R78 August :15 12: :25 13: :35 14: R66 August :40 11: :50 12: :00 14: R65 August :10 12: :15 13: :20 14: R60 September :00 11: :05 12: :10 13: R35 Sub. September :00 15: :05 16: :10 17: AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 42

78 Table 17: OCF Stack Gas Ammonia Concentrations and Emission Rates Sampling Receptor Test Impinger Impinger Ammonia Reference Reference Ammonia Source Tested No. Sample Ammonium Ion Detected Ammonia Volumetric Emission Volume Concentration Concentration Flow Rate Rate ml µg/l µg mg/rm³ Rm³/s mg/s OCF Stack R Average R Average R Average R Average R Average R35 Sub Average Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 43

79 Table 18: Receptor Ammonia Concentrations Sampling Receptor Test Impinger Impinger Ammonia Ammonia Reference Source Tested No. Sample Ammonium Ion Detected Concentration Ammonia Volume Concentration by Volune Concentration ml µg/l µg ppm mg/rm³ Receptors R Average R Average R Average R Average R Average R35 Sub Average Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 44

80 Table 19: Upwind Location Ammonia Concentrations Sampling Receptor Test Impinger Impinger Ammonia Ammonia Reference Source Tested No. Sample Ammonium Ion Detected Concentration Ammonia Volume Concentration by Volune Concentration ml µg/l µg ppm mg/rm³ Upwind R Average R Average R Average R Average R Average R35 Sub Average Reference conditions are 1 atmosphere and 25 C on a wet basis AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Page 45

81 APPENDIX 1 Approved Final Pre Test Plan (51 pages) AECOM Canada, Odour Testing Program at the York Region SeC Trunk Sewer OCF Phase 1b, Autumn, 2015, Report # Appendix 1

82

83 Pre-Test Plan Southeast Collector Trunk Sewer Air Emission Testing and Ambient Air Monitoring Program A Pre-Test Plan: Submission to: Attention: Ontario Ministry of the Environment Standards Development Branch 40 St. Clair Avenue West, 6 th Floor Toronto, Ontario M4V 1M2 Mr. Guillermo Azocar Source Assessment Officer Technology Standards Section Tel: (416) Guillermo.Azocar@ontario.ca Work to be Performed at: Southeast Collector Trunk Sewer Attention: Alex Carciumaru, P.Eng. Manager, Air Quality Engineering AECOM Canada 105 Commerce Valley Drive West Floor 7 Markham, Ontario L3T 7W3 Tel: alexandru.carciumaru@aecom.com Submitted by: Anna H. Bokowa, M.Sc. Senior Project Manager Tel: (905) , Ext. 669 Fax: (905) abokowa@ortech.ca Pre-Test Plan No.: (Revision 1) 25 pages, 1 Appendix Date: February 2, Mississauga Sarnia Windsor 804 Southdown Road, Mississauga, ON Canada L5J 2Y4 Tel Fax

84 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program for AECOM Canada Pre-Test Plan #25829 (Revision 1) TABLE OF CONTENTS Page 1. INTRODUCTION SAMPLING PROGRAM PROJECT METHODOLOGY Ambient Air Odour Sampling Odour Sampling at the Stack Odour Evaluation Volumetric Flowrate Determination Sulphur Compound Sampling and Analysis Hydrogen Sampling and Analysis Ammonia Sampling and Analysis PROCESS CONDITIONS AND PROCESS PARAMETERS QUALITY ASSURANCE PROGRAM TESTING SCHEDULE METEOROLOGICAL DATA COMMUNICATION PROTOCOL REPORTING SITE REQUIREMENTS EMERGENCY CONTACTS AND PROCEDURES...21 Figure 1 Sensitive Receptors...22 Figure 2 Sampling System for Ambient Odours...23 Figure 3 Odour Sampler...24 Figure 4 Odour Panel...25 APPENDIX A Pre-Test Plan Responses

85 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 1 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 1. INTRODUCTION ORTECH Environmental (ORTECH) was requested to prepare this Pre-Test Plan for an air emission testing and ambient air monitoring program at the new Southeast Collector (SEC) Trunk Sewer. The required program is part of Certificate of Approval (CofA) No QJJQ dated February 8, 2011 and IEA Condition 9 and Condition 11 Plans. The odour control system for the SEC Trunk Sewer will operate for the area between the Connection Chamber in Durham Region and the Diversion Facility in York Region. It will be designed to reduce odours inside the Trunk Sewer and will collect any odour emissions that are generated for treatment before being released to the environment. The purpose of the sampling program is to determine the pre and post construction odour and other air emissions in the area of the new SEC Trunk Sewer. The original Pre-Test Plan was prepared by ORTECH on April 28, 2011 for the Ontario Ministry of the Environment (MOE) review and approval. The program scope of work is based on AECOM Request for Proposal (RFP) No , issued in March, This revised Pre-Test Plan was prepared in response to the comments received from MOE which were summarized in several documents listed below, which are included in Appendix A. MOE letter to AECOM dated October 7, 2011 with internal two MOE memoranda: the first memorandum dated May 24,2011 and the second memorandum dated August 8, 2011 AECOM and ORTECH response letter dated November 15, 2011 MOE letter dated December 22, 2011 AECOM response letter dated February 2, 2012 The program will take approximately seven (7) years and will be divided into two phases, Phase 1 and Phase 2. Phase 1 will be divided into two sub phases: Phase 1a and Phase 1b. Phase 1a will include ambient air odour and other air emission monitoring before construction of the odour control system (OCS) facilities and Phase 1b will include ambient air monitoring and source air emissions testing during start-up operations of the OCS.

86 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 2 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Phase 2 will include long term (5 year) ambient air monitoring and source air emissions testing after construction of the OCS facilities. The table below provides a summary of the proposed testing schedule for both Phase 1 and Phase 2. Summary of the Proposed Program Schedule Phase Description Year 1a 1b 2 Pre-operation-Ambient Air Monitoring Start-up Operations- Ambient Air Monitoring and Air Emissions Testing Post Operation-Ambient Air Monitoring and Air Emissions Testing Total Number of Sampling Season Campaigns Spring, Summer, Fall Winter, Spring, Summer one 3 To be determined based on the time of start-up one 3 Spring, Summer, Fall two 3 Spring, Summer, Fall three 2 Early Spring, Summer four 1 Summer five 1 Summer During each phase (Phase 1 and Phase 2) and each campaign of testing (winter, spring, summer or fall), odour samples and samples for other air emission including ammonia, hydrogen sulphide and total reduced sulphur compounds will be taken at sensitive receptor locations as determined by the Ambient Air Monitoring and Reporting Plan, as well as at the corresponding upwind locations. The selected sensitive receptors are R65, R66, R35, R60, R78 and R79. Figure 1 shows a map of these sensitive receptors. Only two pair of the selected sensitive receptors are in line with one wind direction (Receptors R60, R66, R35 and R79). Therefore, they can be sampled during one day. All remaining sensitive receptors will be assessed during separate days. Phase 1a will involve only ambient air monitoring for odour and other air emission at the six sensitive receptors and the corresponding upwind locations. For Phase 1b and Phase 2 additional odour and other contaminant air emissions testing will be scheduled at the stack of the OCS facility at the same time as the ambient air monitoring for odour and other contaminants. Ambient air monitoring will be also conducted downwind and upwind at Shaft 6 and Shaft 4 during three campaigns for the first year of Phase 2 of the program.

87 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 3 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) During each phase and each campaign of testing, the following air emission will be measured: odour hydrogen sulphide, total reduced sulphur compounds (TRS) including hydrogen sulphide, methyl mercaptan, dimethyl sulphide and dimethyl disulphide ammonia During each sampling campaign when ambient air monitoring is performed at the sensitive receptors, one upwind location will be chosen for each wind direction corresponding to the downwind monitoring. Odour and other air emission will be monitored at that upwind location. Therefore, there will be four upwind locations representing a different wind direction (N, S, NE, W) corresponding to the six downwind receptors. 2. SAMPLING PROGRAM The program will be divided into two phases, Phase 1 and Phase 2. Phase 1 will be again divided into two sub phases: Phase 1a and Phase 1b. Phase 1a will be based on ambient air odour and other air emission monitoring at the six sensitive receptors and corresponding upwind locations. Eighteen months of ambient monitoring is scheduled for this phase with three campaigns per year. The first ambient monitoring campaign will be scheduled in 2012 during the early spring season. During each campaign at each sampling location, three samples will be collected for odour evaluations and TRS and ammonia analysis The table below shows the number of samples to be collected during each campaign of testing for Phase 1a. Sensitive Receptor/Corresponding Upwind Location Odour Downwind/ Upwind TRS Downwind/ Upwind H 2 S* Downwind/ Upwind Ammonia Downwind/ Upwind R65/1 3/3 3/3 3/3 3/3 R66/2 3/3 3/3 3/3 33 R35/3 3/3 3/3 3/3 3/3 R60/2 3/3 3/3 3/3 3/3 R78/4 3/3 3/3 3/3 3/3 R79/3 3/3 3/3 3/3 3/3 * H 2 S readings during collection of each Tedlar bag sample

88 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 4 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) H 2 S concentrations will be measured in each Tedlar bag sample, and in the ambient air. Phase 1b will be based on ambient air odour and other air emission monitoring together with air emissions testing at the stack. An ambient air monitoring will be performed at the same six sensitive receptors and corresponding upwind locations. Phase 1b will take place after completing Phase 1a but the exact season of the first campaign is not known yet and will be determined later based on the time of startup for the OCS. For each campaign, at each ambient sampling location (sensitive receptor and corresponding upwind location), three samples will be collected for odour evaluations and TRS and ammonia analysis At the stack, during the first day of testing, twelve odour samples will be collected for odour evaluations in order to determine the optimum predilution to be used for the remaining days of testing at the stack. For these remaining days of the testing, three samples for odour evaluations will be collected at the stack. Three samples for TRS analysis will be collected at the stack as well as three samples for ammonia analysis. The table below shows the number of samples to be collected during testing for Phase 1b. Sensitive Receptor/ Corresponding Upwind Location Odour Downwind/ Upwind TRS Downwind/ Upwind H 2 S* Downwind/ Upwind Ammonia Downwind/ Upwind Stack-odour Stack-Other Air Emission*,** R65/1 3/3 3/3 3/3 3/3 12 (predilution) 3 R66/2 3/3 3/3 3/3 3/3 3 3 R35/3 3/3 3/3 3/3 3/3 3 3 R60/2 3/3 3/3 3/3 3/3 3 3 R78/4 3/3 3/3 3/3 3/3 3 3 R79/3 3/3 3/3 3/3 3/3 3 3 * H 2 S readings during collection of each Tedlar bag sample (ambient air and stack) ** triplicate samples for TRS and ammonia analysis Phase 2 will be based on ambient air odour and other air emission monitoring together with air emission testing at the stack. Again, air monitoring will be performed at the same sensitive receptors as for Phase 1a and Phase 1b and corresponding upwind locations.

89 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 5 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) At each ambient sampling location (sensitive receptor and corresponding upwind location), three samples will be collected for odour evaluations, TRS and ammonia analysis. At the stack, during the first day of the testing, twelve odour samples will be collected for odour evaluations in order to determine the optimum predilution to be used for the remaining days of testing at the stack. For these remaining days of the testing, three samples for odour evaluations will be collected at the stack. Three samples for TRS and ammonia analysis will be collected at the stack. The table below shows the number of samples to be collected during testing for Phase 2. Sensitive Receptor/ Corresponding Upwind Location Odour Downwind/ Upwind TRS Downwind/ Upwind H 2 S* Downwind/ Upwind Ammonia Downwind/ Upwind Stack-odour Stack Air Emission*,** R65/1 3/3 3/3 3/3 3/3 12 (predilution) 3 R66/2 3/3 3/3 3/3 3/3 3 3 R35/3 3/3 3/3 3/3 3/3 3 3 R60/2 3/3 3/3 3/3 3/3 3 3 R78/4 3/3 3/3 3/3 3/3 3 3 R79/3 3/3 3/3 3/3 3/3 3 3 * H 2 S readings during collection of each Tedlar bag sample ** triplicate samples for TRS and ammonia analysis The ambient air monitoring will be also conducted downwind and upwind at Shaft 6 and Shaft 4 during three campaigns for the first year of Phase 2 of the program. At each sampling locations ( one upwind and one downwind), three (3) samples will be collected for odour evaluations, TRS and ammonia analysis. For each campaign and during each phase of the program, meteorological conditions will be monitored during collection of the ambient air samples including temperature, humidity, wind direction, wind speed and cloud cover. An on-site portable anemometer will be used for determining a wind speed. However, the wind speed will be measured approximately 2 m from the ground level. A portable thermometer will be used on-site to record the actual air ambient temperature during collection of the samples. Cloud cover will be determined visually based on the observations of the ORTECH crew.

90 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 6 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) All ambient air sampling during the summer season will be performed when temperatures are above 25 C. All ambient air sampling will be performed at the sensitive receptor locations as determined by the Ambient Air Monitoring and Reporting Plan at the same time as sampling at the corresponding upwind location. However, if the wind direction is not towards a specific sensitive receptor after a prolonged waiting time, ORTECH, in consultation with AECOM and MOE, will select a substitute location at approximately the same distance as the selected sensitive receptor from the OCS facility upon careful investigation of the surrounding topography and possible other odour sources in the area around the substitute location. For Phase 1b and Phase 2, three samples for each type of air emission (odour, TRS, and ammonia) will be collected at the stack for analysis. Only two (2) pairs of the selected sensitive receptors are in line with one wind direction (Receptors R60, R66 R35 and R79). Therefore, they can be sampled during one day. All remaining sensitive receptors will be assessed during separate days. It is estimated that each campaign of testing (spring, summer, fall or winter) will take a minimum of four (4) days. However, if it is not possible to obtain a certain wind direction during the sampling, ORTECH proposes to perform ambient sampling at the selected locations with the distances similar to the distances of the sensitive receptors from the potential odour source. The assumption will be made that the odour concentration at the measured substitute location will be similar to the concentration at the required sensitive receptor. This methodology requires investigation of any potential odour sources in the area, which would take place before any ambient sampling. ORTECH proposes the following field work: Phase 1a Three campaigns are scheduled each year (18 months) for this phase of the program: the first campaign will start during the spring season, the second campaign will be performed during the summer season and the third campaign will start during the fall season. For each campaign a minimum four days of ambient sampling is scheduled. At each sensitive receptor and one corresponding upwind location, three samples will be collected for odour evaluations TRS and ammonia analysis. H 2 S concentrations will be measured in each Tedlar bag sample.

91 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 7 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) The schedule for each campaign will be: Day 1 - collect three (3) samples for odour and total reduced sulphur compound analysis at location R65 (or substitute location) and three (3) samples for odour and total reduced sulphur compound analysis at one upwind location. Collect three (3) samples per location for ammonia analysis Day 2 - collect three (3) samples for odour and total reduced sulphur compound analysis at locations R66 and R60 (or substitute locations) and three (3) samples for odour and total reduced sulphur compound analysis at one upwind location. Collect three (3) samples per location for ammonia analysis. Day 3 - collect three (3) samples for odour and total reduced sulphur compound analysis at locations R35 and R79 (or substitute locations) and three (3) samples for odour and total reduced sulphur compound analysis at one upwind location. Collect three (3) samples per location for ammonia analysis. Day 4 - collect three (3) samples for odour and total reduced sulphur compound analysis at location R78 (or substitute location) and three samples for odour and total reduced sulphur compound analysis at one upwind location. Collect three (3 samples per location for ammonia analysis. Phase 1b Phase 1b of the program will be based on ambient air odour and other air emission monitoring as well as the stack emission testing. Three campaigns are scheduled for this phase. The schedule for each campaign will be: Day 1 - collect twelve (12) odour samples at the stack using a full predilution technique. An optimum dilution will be chosen for the sampling at that source for the remaining days of sampling. ORTECH will also collect three (3) ambient samples at location R65 (or substitute location) and three samples at one upwind location. A total of eighteen (18) odour samples will be collected for odour analysis. A volumetric flow rate will be measured at the stack and odour emission rates will be calculated for that source. Three samples will also be collected for TRS analysis at the stack as well as these two ambient locations (sensitive Receptor R65 and the corresponding upwind location). Three ammonia samples will be collected at each ambient sampling location and at the stack.

92 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 8 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Day 2 - collect three (3) samples for odour and total reduced sulphur compound analysis at R66 and R60 locations (or substitute locations) and three (3) odour and total reduced sulphur compound samples at one upwind location. Three samples will be collected at the stack for odour, TRS and ammonia analysis. The odour samples will be collected at the optimum dilution chosen during the full predilution sampling at this source. A volumetric flow rate will be measured at the stack and the emission rates will be calculated for the stack for that day. In addition three samples will be collected at each ambient location and the stack for ammonia analysis. Day 3 - collect 3 samples for odour and for total reduced sulphur compound analysis at R35 and R79 locations (or substitute location) and three samples for odour and total reduced sulphur compounds analysis at one upwind location. Collect three (3) samples for ammonia analysis at these two ambient locations. Also, three (3) samples will be collected at the stack for odour, TRS analysis. The odour samples will be collected at the optimum dilution chosen during the first day of the testing. A volumetric flow rate will be measured at the stack and the emission rates will be calculated for the stack for that day. Three (3) ammonia samples will be also collected at the stack. Day 4 - collect three (3) samples for odour and total reduced sulphur compound analysis at location R78 (or substitute location) and three (3) samples for odour and total reduced sulphur compound analysis at one upwind location. Collect three (3) samples for ammonia analysis at these two locations. At the same time as ambient monitoring, three (3) samples will be collected at the stack using a dilution technique. The samples will collected at the dilution chosen as an optimum dilution during the first day of the sampling. A volumetric flow rate will be measured at the stack and the emission rates will be calculated for the stack for that day Three (3) samples will be collected for TRS compound and ammonia analysis. For each collected Tedlar sample bag, the hydrogen sulphide concentration will be determined using a Jerome analyzer. The hydrogen sulphide concentration will also be determined at the stack before any samples are collected.

93 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 9 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Phase 2 Phase 2 of the program will be based on ambient air odour and other air emission monitoring as well as stack emission testing. Five years of ambient air monitoring and air emissions testing at the stack is scheduled for this phase. During the first year of testing, three campaigns are scheduled representing monitoring during spring, summer and fall seasons. The second year of the monitoring will include air emissions testing at the stack and ambient air monitoring during three campaigns representing spring, summer and fall seasons. During the third year of the monitoring two campaigns are scheduled for air emission monitoring and emission testing during early spring and summer seasons. The last two years of the program will be performed only during the summer season. All sampling will be performed in same way as during the Phase 1b of the program. It will include ambient air monitoring at the six sensitive receptors and corresponding upwind locations as well as the air emissions testing at the stack. The number of days scheduled for monitoring during each campaign will be the same as for Phase 1b. The number of samples collected for each measured compound will follow the same pattern as for Phase 1b. Ambient air monitoring at the two shafts will be performed during three campaigns for the first year of Phase 2 and will include the collection of three (3) samples for odour evaluation and TRS and ammonia analysis at one location downwind from the shafts and one location upwind from the shafts. It is expected that two (2) days are required to perform ambient monitoring at these two shafts.

94 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 10 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 3. PROJECT METHODOLOGY 3.1 Ambient Air Odour Sampling During ambient air sampling at either each selected sensitive receptor or upwind location, three samples will be collected in 45L Tedlar bags for odour evaluation by an odour panel using a lung sampling technique. A picture of the lung sampler is provided in Figure 2. Samples will be collected through a Teflon probe at a height of 1.5 m to approximate the breathing height and all Tedlar bags will be purged for 5 minutes prior to sampling. All the odour Tedlar bags will be covered with dark colour garbage bags immediately after sampling in order to minimize potential photochemical reactions. All ambient air samples will be collected over 10 minute time periods. In addition, during each downwind odour assessment, one upwind location will be chosen to determine any background odours. New sample bags will be used for all ambient air sampling. The ORTECH procedures for cleaning the new Tedlar bags ensure that there are no detectable residual odours. All new Tedlar bags will be placed in the specially designed oven with constant filtered heated air. The temperature of the oven will be kept high enough to remove all volatile compounds from the Tedlar material during the heating process. All Tedlar bags will be checked for any residue odour or any leakage before use. One sample from a batch of cleaned bags will be evaluated for odour detection threshold value (ODTV) by the full odour panel using dynamic olfactometry. Only new cleaned Tedlar bags with no residual odour will be used for the program. 3.2 Odour Sampling at the Stack Odour samples will be collected using a predilution sampling method, whereby emission gases are diluted with odourless nitrogen as the gases are extracted from the emission source. The procedure is designed to minimize the loss of odorants by adsorption, condensation and oxidation. An eductor pre-dilution sampling system will be used for the odour sampling in this test program. Figure 3 shows a schematic of the eductor pre-dilution sampling system. A venturi eductor, powered by pre-purified nitrogen, creates a suction and draws a low flow of sample into the stream. The nitrogen flow is maintained at a constant rate, and the sample flow rate is measured using a Magnehelic differential pressure gauge to obtain the pressure drop across a calibrated capillary tube. The entire dilution sampler will be maintained at the approximate stack gas temperature.

95 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 11 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) All odour samples will be collected in new, cleaned, 40 litre Tedlar (polyvinyl fluoride) gas sample bags, which have been evaluated to ensure they have no residual odour. After sampling the bags will be covered with dark colour garbage bags immediately in order to minimize potential photochemical reactions. Each sample bag will be purged with diluted gas sample and then refilled with test sample. Each sample bag will be collected over a 10 minutes time period. During each campaign for each day of the odour air emission testing, an odour sampler blank will be collected on site. All blanks will be treated the same way as actual collected samples. For each campaign of testing during the first day of sampling at the stack for Phase 1b and Phase 2, full pre-dilution will be used on site. Twelve odour sample bags will be collected representing three samples at four different dilutions. The optimum dilution will be chosen for the odour testing at the stack during the remaining days of the odour testing for each campaign. During the remaining days only three odour samples will be collected at the optimum dilution determined during the first day of odour sampling. Before each sample is collected, the hydrogen sulphide concentration will be measured in the stack gas using a Jerome analyzer. Also each sample bag will be checked for hydrogen sulphide concentration using the Jerome analyzer. Air emission testing at the stack will be performed at the same time as the ambient air monitoring at the sensitive receptors and corresponding upwind locations. Stack emission testing will be performed at two sample ports located 90 o apart from one another. The sample ports are accessible from within the OCF building as the stack is hidden from view outside of the facility. The ports are located 4 m from the top of the exhaust stack. The total height of the OCF stack is 12 m with an internal stack diameter of 1200 mm, and a stack exit diameter of 1050 mm.

96 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 12 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) The figure below illustrates the exhaust stack and sample port locations. 3.3 Odour Evaluation All samples at the stack will be collected in 40 L Tedlar bags. Samples at the ambient locations will be collected in 45 L Tedlar bags. Larger volume Tedlar bags will be used for the ambient sampling due to the expected low odour concentrations that may be present in the ambient air. All samples will be evaluated for odour detection threshold value (ODTV), offensiveness threshold value (OFTV) and complaint threshold value (OCTV). The hedonic tone and character of any detected odour will also be determined on collected ambient air samples.

97 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 13 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) The odour samples will be evaluated within 8 hours after collection by the dynamic dilution olfactometer at ORTECH s odour test facility (Figure 4). It is very important to keep the time period between sampling and evaluation very short due to the possible odour losses with time especially when hydrogen sulphide is expected to be present. The ORTECH facility is a specialized room, designed to provide an odour-free environment for accurate evaluations. The ORTECH olfactometer is a binary port system operated in a non-forced choice mode. The sample bag is pressurized in a pressure vessel, and the resulting flow metered through an electronic mass flow controller at a predetermined rate. The sample is diluted with flow-controlled odorless air, and is passed to the panel members through one of two sample ports. A three-way valve allows the operator to direct the sample through either of the two ports. Each evaluation begins at a high dilution level, which is lowered in a step-wise sequence by a factor of 1.41 at each step. At each dilution level, the panelists register their responses by entering the letter of the port at which they detect the odour. The range of dilution ratios of the ORTECH olfactometer is from 5,793 times to 1 times. The ORTECH olfactometer is capable of having a dilution as low as 1 times. The panelists responses are processed to determine the ODTV, OFTV and OCTV for the sample. This is done by a regression analysis of the log of the dilution level versus the probit value of the percent of the panel responding. The point at which statistically 50% of the panel can just detect the odour is recorded the ODTV. The point at which statistically 50% of the panel can determine that the odour is offensive is recorded the OFTV. OCTV is the point at which statistically 50% of the panel may complaint about the odour. The odour detection threshold value or odour offensiveness or complaint threshold value is a dilution factor and therefore has no units. For convenience, however, the ODTV as well as OFTV and OCTV may be expressed in odour units (ou). Hedonic tone and character of the odour will be determined on the ambient air samples before they are evaluated for ODTV, OFTV and OCTV. However, samples collected at the source will not be evaluated for hedonic tone and character due to the potential hazard to the panel members. Hedonic tone and characterization of odour requires direct sniffing from the bags, and therefore, it is not recommended by ORTECH for samples to be evaluated at the high odour levels due to the potential hazard of the panel members.

98 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 14 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Eight panel members will be used for all evaluations. They are drawn from a pool of people who routinely participate in this type of work. They have all been tested at least annually for odour sensitivity and are considered to be within the normal range. All panelists responses for ODTV will be provided in the report. Before any evaluation begins, dilution air will be introduced to the panelists through the olfactometer in order to determine if there is any residue odour in the system. Dilution air will be introduced several times, if necessary, until the panelists cannot detect any residual odours. 3.4 Volumetric Flowrate Determination At the stack, gas volumetric flowrate measurements will be taken during each campaign following Method 2 of the MOE Source Testing Code. Velocity pressure readings will be taken using a standard type pitot tube and an electronic micromanometer. The gas temperature will be measured using a digital meter with type K thermocouple. Volumetric flowrate measurements will be taken at the same stack sampling ports used for the stack emission testing. The sampling ports are at non-ideal locations. The port location will not significantly affect the odour threshold value determinations because the stack emissions are well mixed. Prior to collecting odour samples, ORTECH will check for any flow disturbances (cyclonic, turbulence, stratification, flow skewed) that may significantly impact flow measurements. Further, to compensate for any non-laminar flow the number of measurements for determining the stack emission flowrate will be doubled. 3.5 Sulphur Compound Sampling and Analysis Samples for reduced sulphur compound analysis will be acquired using Tedlar bags. Three samples will be collected at each location (stack, ambient air downwind locations, ambient air upwind locations). All samples will be analyzed for hydrogen sulphide, methyl mercaptan, ethyl mercaptan, dimethyl sulphide and dimethyl disulphide. Analysis will be carried out as soon after sample acquisition as possible to maintain sample integrity but within a maximum time of six (6) hours, using an HP 5890SII gas chromotograph (GC) with an all Teflon sample pathway consisting of a 6 x 1/8 Teflon Chromosil /100 mesh, a gas sampling valve (GSV) fitted with a Teflon loop and a Sievers Model 350B Sulphur Chemiluminescence Detector (SCD).

99 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 15 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) The Sievers SCD (unlike the Flame Photometric Detector) is very specific to sulphur compounds (no false positives) and is linear over a wide range of concentrations. The samples will be analyzed as soon after sample acquisition as possible to maintain sample integrity. The Method Reference is Environment Canada Report EPS 1/RM/6, Reference Method for Source Testing: Measurement of Releases of Total Reduced Sulphur (TRS) Compounds from Pulp and Paper Operations. A spike sample will be analyzed to determine the percentage recovery. A travel blank will be collected and analyzed for each batch of collected samples. All analyses for reduced sulphur compounds will be conducted by ORTECH. 3.6 Hydrogen Sulphide Testing Concentrations of hydrogen sulphide in each Tedlar bag odour samples as well as at the stack and ambient locations directly will be measured using a Jerome Model 631-X hand-held analyzer. 3.7 Ammonia Sampling and Analysis The procedures for ammonia sampling and analysis will follow standard test methods which are approved for MOE compliance testing. Ammonia will be sampled using midget impingers containing dilute sulphuric acid solution. Each test will last for one hour followed by ammonia analysis of the impinger samples using a colorimetric technique. Three tests will be performed at each location for each testing campaign. A travel blank and a laboratory blank will be analyzed for each batch of collected samples. For the proposed method, quality assurance measures will be followed which include the following items: Calibration of sampling equipment Preparation of analytical curves using calibration standards Duplicate analyses Analyses of blank samples Analyses of spike samples Ammonia analyses will be performed by ALS Group laboratory located in Burlington, Ontario. The laboratory is a certified laboratory for this type of analysis. The name of the person responsible for the analysis is provided in Section 10.

100 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 16 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 4. PROCESS CONDITIONS AND PROCESS PARAMETERS The process conditions and parameters are as follows: Process Conditions and Parameters Maximum Air Flow rate, m 3 /h 58,300 Average Inlet Relative Humidity, % 75 Air Inlet Temperature, C Average Odour and Odour Contaminant Loadings Average H 2 S Loading, ppm 2 Average MM Loading, ppm 0.1 Average DMS Loading, ppm Trace Average DMDS Loading, ppm Trace Average NH 3 Loading, ppm 0.1 Average Odour Loading, ou 5,000 Maximum Odour and Odour Contaminant Loadings Maximum H 2 S Loading, ppm 40 Maximum MM Loading, ppm 1.0 Maximum DMS Loading, ppm Trace Maximum DMDS Loading, ppm Trace Maximum NH 3 Loading, ppm 0.5 Maximum Odour Loading, ou 50,000 The maximum airflow through the OCF may not be the maximum value as stated above during testing. The water flowrate within the SeC trunk sewer dictates the amount of airflow required through the trunk sewer ventilation system. Monitoring equipment for airflow measurement and H 2 S concentration are to be installed as part of the overall system process. York Region will be constantly monitoring the airflow and odour compound concentrations through the system for operation and maintenance. The current measured airflow volume and H 2 S levels should be referred to prior to commencing testing to determine the actual process conditions at the time of testing.

101 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 17 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 5. QUALITY ASSURANCE PROGRAM For this program, ORTECH will include an extensive quality assurance/quality control (QA/QC) component within the current program. Some of tasks to be undertaken with the QA/QC program are: Preparation of Tedlar bags including leak checks and determination of background odours. The bags will be cleaned with heated air for a period of time until background odours from the Tedlar are not detectable. One sample from each batch of cleaned bags will be checked by the full odour panel. All records of the cleaning process will be recorded. Cleaning of all odour sampling equipment with checks for background odours. Collecting blanks for all odour samplers used on-site and the blanks will be collected every time the odour sampler is used. Replacement with new fittings and Teflon tubing, as appropriate. Calibration of dilution odour samplers at different sample gas temperatures using a propane gas calibration standard and a calibrated total hydrocarbon analyzer. Calibration of pitot tubes, temperature measuring devices and manometers, following the MOE Source Testing Code. Inspection of all equipment for defects and damage. Sampling and measurements will be conducted only when it is known that process conditions are acceptable. A detailed log book and standard data sheets will be used to record test details (time, weather conditions, test procedures, process observations). The field crew will record personnel observations regarding the sampling and measurement periods, such as the apparent strength and character of the odour. Odour samples will be evaluated by the odour panel within 8 hours of sample collection. All panelists will be screened using the European Method EN:13725 with n- butanol. Blank air will be introduced to the panel members before evaluations of any odour samples. Travel blanks for TRS and ammonia analysis will be taken for each trip. All raw data will be recorded using the forms and log books which are considered to be acceptable by the MOE for compliance purposes.

102 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 18 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 6. TESTING SCHEDULE The program is divided into two phases: Phase 1 and Phase 2. Phase 1 will be divided into two sub phases: Phase 1a and Phase 1b. It is estimated that the Phase 1a of the program will start in early spring of Two years of the monitoring is scheduled for Phase 1a with three campaigns each year. Phase 1 b will start up after completion of the Phase 1a, however the season is not known yet and it will depend on the start-up of the OCS. Phase 1b schedule will be provided later and it will be based on the time of startup for the OCS. Each campaign of the program (Phase 1a and Phase 1b) requires approximately four days to finish sampling including ambient sampling but these may not be consecutive days depending on the weather and process conditions. All ambient sampling at the sensitive receptors will depend on the wind directions. If it is not possible to measure an ambient odour level exactly at a sensitive receptors a substitute location will be chosen for ambient sampling, which will be located at approximately the same distance from the stack and upon a careful investigation of the terrain. For Phase 1b and Phase 2, ambient monitoring at the selected sensitive receptors and corresponding upwind locations will be performed at the same time as the air emission testing at the stack. Phase 2 will take place five years from the start of that phase. It is estimated that during the first two years of the Phase 2 of the program, three campaigns are scheduled for each year. During the third year of the Phase 2 of the program, only two (2) campaigns will be scheduled. In the years four and five, only summer campaigns are scheduled for this program. During the first year of Phase 2, ambient air monitoring at one downwind location and one upwind location from each of the two shafts will be performed. All odour evaluations will be performed within 8 hours of sample collection. After completion of each campaign of the program, a report will be issued to AECOM summarizing the sampling program and results. For Phase 1b and Phase 2, ORTECH needs to set-up equipment at the tested stack, therefore, ORTECH requires assistance in opening gate (if any) as well as requires a safe access to the stack including platform to safety reach the sampling ports.

103 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 19 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 7. METEOROLOGICAL DATA During each day of the sampling for each collected ambient sample, ORTECH will record data for temperature, humidity, wind speed, wind direction and cloud cover. An on-site portable thermometer and anemometer will be used for this purpose. In addition, all meteorological conditions for the day of the sampling will be recorded from the closest meteorological station (available from the website). However based on the previous experience, the observed meteorological conditions may be different from those recorded by the closest meteorological station. 8. COMMUNICATION PROTOCOL ORTECH will use cell phones for communication on-site and between the ORTECH crew and the project manager. However, ORTECH needs to have at least one phone number of a person from Durham/York Region in case of emergency. The MOE will be notified about the source and ambient testing schedule. However, due to the fact that ambient sampling depends on the meteorological conditions, it is expected that notification will be provided just one day before the actual sampling, or it may be cancelled due to the weather conditions on the scheduled day. 9. REPORTING At the conclusion of each phase of the project for each round of testing ORTECH will submit draft data for odour panel evaluation work within 24-hours from the date of finishing the odour panel sessions. ORTECH will prepare a draft report within four weeks from the completion of each campaign of testing which will detail the test methodology and results. For each phase of the testing, a final report will be issued within seven days from the date when AECOM or MOE comments are received. The report will be available in electronic pdf and hard copy (3 copies).

104 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 20 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Each report will include the following items: executive summary program description sampling methodology raw field data air emission data for odour and other contaminants ambient air data for odour and other contaminants calibration data panelists responses 10. SITE REQUIREMENTS Safety boots and safety glasses would be used on-site during sampling at the OCS during Phase 1b and Phase 2. However, these are not required during the ambient sampling. The following is a list of personnel involved with the compliance testing program: MOE Guillermo Azocar Tel: (416) Source Assessment Officer Fax: (416) Technology Standards Section York Ilangkumaran Ratnasamy Tel: (905) , Ext Capital Project Specialist Fax: (905) AECOM Alexandru Carciumaru, P.Eng. Tel: (905) Manager Fax: (905) AQ Engineering Environment ORTECH Anna Bokowa, M.Sc. Tel: (905) , Ext. 669 Senior Project Manager Fax: (905) Odour Assessment ALS Ron Mc.Leod Tel: (905) (ammonia analysis) ORTECH Eugene Shereshevsky Tel: (905) , Ext. 399 (TRS analysis)

105 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 21 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) 11. EMERGENCY CONTACTS AND PROCEDURES In case of any emergency, ORTECH will call an emergency number- 911 and/or notify the supervisor of that project. The following is the list of contacts: Emergency...Tel: 911 Anna Bokowa, ORTECH...Cell: (647) Stephen Thorndyke, ORTECH...Cell: (647) Eugene Shereshevsky, ORTECH...Cell: (905) Alexandru Carciumaru, AECOM...Cell: (416)

106 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Page 22 of 25 Ambient Air Monitoring Program for AECOM Canada Pre-Test Plan #25829 (Revision 1) Figure 1 Sensitive Receptors Sensitive Receptors R65 Sensitive Receptors R60 and R35 Sensitive Receptors R78 and R79

107 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 23 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Figure 2 Sampling System for Ambient Odours

108 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 24 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Figure 3 Odour Sampler Differential Pressure Diluted Tedlar Bag Sample Flux Chamber Tedlar Bag Sample Capillary Valve Eductor (Aspirator) Heated Zone Nitrogen Regulator

109 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Page 25 of 25 for AECOM Canada Pre-Test Plan #25829 (Revision 1) Figure 4 Odour Panel EIGHT EVALUATION CUBICLES WITH RESPONSE BUTTONS A 2-WAY VALVE B }MASS FLOW CONTROLLERS 3-WAY VALVE FILTERED COMPRESSED AIR CONTROL STATION COMPRESSED AIR PRESSURE VESSEL TEDLAR BAG

110 ORTECH Environmental Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program Appendix A for AECOM Canada Pre-Test Plan #25829 (Revision 1) APPENDIX A Pre-Test Plan Responses (22 pages)

111 AECOM Town Centre Boulevard tel Markham, ON, Canada L3R 5Z fax February 2, 2012 Mr. Dan Orr Manager, Technical Support Section Ministry of the Environment Central Region Office 5775 Yonge Street, 8 th Floor North York, ON M2M 4J1 Dear Mr. Orr: Project No: Regarding: Southeast Collector Trunk Sewer EA Air Emission Testing and Ambient Air Sampling Pre-Test Plan Responses Please find attached AECOM response to the letter submitted on December 22, 2011 by the Ministry of the Environment in regard to Southeast Collector Trunk Sewer Air Emissions Testing and Ambient Air Monitoring Program. The following represents the responses to the letter: Comments Comment 2: York Region has clarified that two campaigns and not three campaigns at Shaft 6 and 4 during Phase 2 will be taken. The Ministry recommends a total of three campaigns at shaft 6 and 4 since this is a potential odour source. This coincides with Condition 9 and 11 where it stipulates three ambient monitoring samples will be collected at the sensitive receptor and at dispersion stack (not just the Odour Control Facility). Response: As per Condition 9 and 11 plans, ORTECH will perform three campaigns sampling at Shaft 6 and Shaft 4 during Phase 2 Year 1. These will include ambient odour and contaminant assessment downwind and upwind. Copy Of New Sec Ambient Air Sampling Program Pre Test Plan MOE Letter Response (2).Docx

112 Page 2 February 2, 2012 Comment 3: The response provided by the Region has clarified that the blanks will be evaluated by the odour panel; this is acceptable so long as the odour panel responses are provided as supporting documentation in the report. Response: All raw data and the panelists responses on the odour detection threshold value evaluations for all evaluated samples including blank samples will be provided as supporting documentation in the report. Comment 6: The response provided has stated that the hedonic tone and odour characterization will only be conducted for ambient monitoring and will not be performed for source testing samples, due to the potential hazard to the panel members. It is recommended this explanation is added to the Plan. Response: The revision of the Pre-Test Plan will include an explanation of why the hedonic tone and odour characterization will not be provided for source testing samples collected at the stack that are analyzed by the odour panel. Comment 8: The response provided needs to be integrated into the Plan. The Plan should also stipulate how the meteorological parameters will be recorded. It is not clear if a portable anemometer will be on site. Response: On- site meteorological conditions will be monitored. A portable anemometer will be used for recording a wind speed. The wind speed will be recorded at approximately 2 meters above ground. The cloud cover, temperature (using a portable thermometer) and wind direction will be also recorded during ambient sampling. This explanation will be incorporated into the Pre-Test Plan. Comment 11: Based on Condition 9 and 11, AERMOD will be used for the dispersion modelling for the Odour Control Facility; however the version of this model has not been specified. Please note that the use of AERMOD model Version requires approval from the Ministry s Emission Monitoring and Reporting Branch (EMRB). If the previous version of AERMOD (Version 09292) is used, then approval is not required. However this must be clarified and integrated in the pre-test plan. Response: AERMOD Version will be used for the dispersion modelling for the Odour Control Facility. Approval from the MOE EMRB will be sought to use this model for this work. Copy Of New Sec Ambient Air Sampling Program Pre Test Plan MOE Letter Response (2).Docx

113 Page 3 February 2, 2012 Observations Observation 1: Observation 2: Location of the sampling ports: Based on the diagram provided by AECOM, the sampling ports are located non-ideal, as 2.9 equivalent stack diameters upstream from the stack duct contraction, and 2.8 equivalent stack diameters downstream from a disturbance. This is a highly non-ideal location that requires documentation indicating that there are non flow disturbances (cyclonic, turbulence, flow skewed) that may significantly impact flow measurements and sample representativeness of the source. Response: The port location will not significantly affect the odour threshold value determinations because the stack emissions are well mixed. Prior to collecting odour samples, ORTECH will check for any flow disturbances (cyclonic, turbulence, stratification, flow skewed) that may significantly impact flow measurements and sample representativeness of the source. Further, to compensate for any non- laminar flow the number of measurements for determining the stack emission flowrate will be doubled Flow measurements (for odour emission determination) are required to be standardized and wet basis. Yes, samples are required standard wet basis. If ORTECH believes that by not using the stack gas temperature the dilution ratio used will be compromised; ORTECH can provide a technical assessment based on the temperature of the dilutent, temperature of the stack, and the proportions of the stack gas versus dilutent used. I have gone through those calculations, and the wet standardized flow resembles better the odour transport and impact that is being mimicked. Response: As requested by the MOE odour emission rates will be calculated based on the wet standardized basis. Observation 4: Two samples for the ammonia will be collected as part of the ambient air sampling and source testing program. Two samples are not statistically representative to document a snapshot of a process. There is not emissions tendency that can be drawn from these two samples. Response: Three samples for ammonia analysis will be collected at each selected location. This will be incorporated to the revised pre-test plan. Observation 5: The response states the samples will be analyzed as soon after sample acquisition as possible to maintain sample integrity with a maximum time of 6 hours. Depending on the sulphur constituents, and physical/chemical characteristics of the sample; the integrity of the sample can be compromised if analyzed beyond the within 1-hour of collection. Response: Analysis will be carried out as soon after sample acquisition as possible to maintain sample integrity but within a maximum time of six (6) hours. If necessary to compensate for a time delay a spike sample will be analyzed to determine the percentage recovery. Copy Of New Sec Ambient Air Sampling Program Pre Test Plan MOE Letter Response (2).Docx

114 Page 4 February 2, 2012 Observation 6: Maybe theree is confusionn with regardss to the generation of the odour. The OCS does not generate the odour, it treats it. The monitoring, collection and reporting on the trunk sewer raw sludge processing, raw sludge s stream origin, and quality of the sludge is what defines the odour generation; not the guesstimate that the OCS will handle 50,000 ou. Response: The volume of airflow through the OCF for treatment is a function of the sewage liquid flow volume within the YDSS trunk sewer. Equipment for monitoringg the sewage liquid flow and the H 2 S concentration in the trunkk sewer headspace will be installed as part of the overall system process controls. York Region will continually monitor the airflow and H 2 S compound concentrations upstream and downstream of OCF to ensure system performance, operation, maintenance and reporting requirements. We hope the clarifications and responses provided in response to MOE comments related to the New SeC Ambient Air Sampling Program Pre-Test plan will meet the requirements for the plan approval and the start of 2012 spring sampling campaign. If you have any additional questions, please do not hesitate to contact us. Sincerely, AECOM Alex Carciumaru, P.Eng. alexandru.carciumaru@aecom. com Manager, Air Quality Engineering Copy Of New Sec Ambient Air Sampling Program Pre Test Plan MOE Letter Response (2).Docx

115 Ministry of the Environment Central Region Technical Support Section 5775 Yonge Street, 8 th Floor North York, Ontario M2M 4J1 Tel.: (416) Fax: (416) Ministère de l Environnment Région du Centre Section d'appui technique 5775, rue Yonge, 8 ième étage North York, Ontario M2M 4J1 Tél. : (416) Téléc. : (416) December 22, 2011 Alex Carciumaru, P.Eng. Manager, Air Quality Engineering AECOM Environment 300 Town Centre Blvd Markham, ON, L3R 5Z6 TSS Comments: Pre-Test Plan New YDSS Southeast Collector Trunk Sewer Air Emission Testing and Ambient Air Monitoring Program York Region Response November 15, 2011 Dear Mr. Carciumaru, The response to our comments on the proposed Ambient Odour & Source Testing Sampling Program for the New York Durham Sewage System (YDSS) Pre-Test Plan (Plan), submitted by AECOM on November 15, 2011 has been reviewed and the following additional comments are offered: Comment 2 York Region has clarified that two campaigns and not three campaigns at the selective sensitive receptors during Phase 2 will be taken. The Ministry recommends a total of three campaigns at Shaft 6 and 4 since this is a potential odour source. This coincides with Condition 9 and 11 where it stipulates three ambient monitoring samples will be collected at the sensitive receptor and at the dispersion stack (not just the Odour Control Facility). Comment 3 The response provided by the Region has clarified that the blanks will be evaluated by the odour panel; this is acceptable so long as the odour panel responses are provided as supporting documentation in the report. Comment 6 The response provided has stated that the hedonic tone and odour characterization will only be conducted for ambient monitoring and will not be performed for source testing samples, due to the potential hazard to the panel members. It is recommended this explanation is added to the Plan. 1