Reviewed by: Approved by: N/A N/A. Security Classification: N/A

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2 Revision History Rev N/A Description: N/A (First Issue). Issue Date: Prepared by: Reviewed by: Confirmed by: Approved by: N/A N/A N/A N/A N/A Document Classification: N/A Security Classification: N/A DISCLAIMER Kinectrics prepared this report as a work of authorship sponsored by their client. This report has been prepared solely for the benefit of the Client and may not be used or relied upon in whole or in part by any other person or entity without Client permission or without Kinectrics permission if required by the Contract between Client and Kinectrics Inc. Neither Kinectrics, their client nor any person acting on behalf of them: (a) makes any warranty or representation whatsoever, express or implied, or assumes any legal liability of responsibility for any third party s use, or the results of such use, with respect to (i) the use of any information, apparatus, method, process, or similar item disclosed in this report including the merchantability or fitness for any particular purpose of any information contained in this report or the respective works or services supplied or performed or (ii) that such use does not infringe on or interfere with privately owned rights, including any party s intellectual property; or (b) assumes responsibility for any damages or other liability whatsoever (including any consequential damages resulting from a third party's selection or use of this report or any information, apparatus, method, process, or similar item disclosed. Copyright Kinectrics Inc. & Hydro One Networks Inc All rights reserved. Page 2 of 21

3 Table of Contents 1 Introduction Magnetic Field Measurements Survey procedure Test locations and measurement results Measurement data analysis Assessment of Exposure Line loading data Magnetic field contribution from land use considering the existing conditions Magnetic field contribution from land use considering the future conditions Conclusions References...21 List of Figures Figure 2-1 Runnymede TS planned station expansion area to the west of existing yard... 5 Figure 2-2 Conductor restringing project on 115kV circuits K1W/K3W/K11W/K12W... 6 Figure 2-3 EMF study area... 6 Figure 2-4 GPS location of the magnetic field measurements: overall view...14 Figure 2-5 GPS location of the magnetic field measurements: detailed view of the study area 15 Figure 2-6 Reference levels for exposure to time varying magnetic fields (taken from [2] Fig. 2)...16 Figure 2-7 Magnetic field profiles along the measured traverses/paths in the area of interest..17 List of Tables Table Hz Magnetic field measurement results... 8 Table 3-1 Circuit loading data...18 Page 3 of 21

4 1 Introduction Toronto Runnymede TS is located north east of Jane St. and St. Clair Ave., and sits under the 115 kv circuits K1W/K3W/K11W/K12W. To accommodate load growth in the west Toronto area, a new DESN is planned at Runnymede TS. The existing station will be expanded to the West. The planned station expansion area is shown in Figure 2-1. Under normal operating conditions, 115kV circuits K1W/K3W/K11W/K12W (Manby TS x Wiltshire TS) supply Runnymede TS, Fairebank TS and Wiltshire TS in the west Toronto area. These circuits also supply the area further east including Dufferin TS and Bridgman TS under system contingencies, particularly contingencies at Leaside TS. The load increase at Runnymede TS, projected to be about 42MW, effectively reduces the load transfer capacity to Dufferin TS and Bridgman TS. Therefore the circuit conductors will be upgraded to avoid compromising existing load transfer capability. The conductor restringing project on this circuit corridor is shown in Figure 2-2. Under these circuits, in the Woolner Park, there are 4 basketball courts and a playground with a few play structures (see Figure 2-3). To better address public questions regarding exposure to electromagnetic fields (EMFs), Hydro One asked Kinectrics to conduct a EMF study in this area with reference to the EMF Management Plan for the city of Toronto adopted in 2008 [1]. The study takes into consideration the current situation and assesses the impact of the Hydro One upgrades described above. Circuits K1W/K3W/K11W/K12W are strung on four-circuit towers (see Figure 2-3). In the area of interest, from tower structure #26 located west of Jane St., circuits K1W/K3W diverge from K11W/K12W on two separate tower structures #27 and #27A, to rejoin the four-circuit tower arrangement at structure #28 east of Runnymede TS switchyard. It is worth mentioning that an EMF Management Plan for this location may already exist in the Toronto Public Health records as the City Council adopted this EMF Management Plan almost ten years ago. However, no information was transmitted to Kinectrics about an existing plan. 2 Magnetic Field Measurements 2.1 Survey procedure A calibrated Dexsil Field Star 4000 meter was used to measure 60 Hz magnetic flux density on all three axes. The device displays the maximum resultant vector rms magnitude at 60 Hz. The calibration certificate is attached to this report. The measured results are reported in milligauss [mg]. Page 4 of 21

5 Figure 2-1 Runnymede TS planned station expansion area to the west of existing yard [ The remainder of this page intentionally left blank. ] Page 5 of 21

6 Figure 2-2 Conductor restringing project on 115kV circuits K1W/K3W/K11W/K12W Figure 2-3 EMF study area Page 6 of 21

7 2.2 Test locations and measurement results The measurements were performed on May 29th, 2017, between 9:59 am and 11:15 am EST. Mean temperature for the day was 19.9 degree Celsius. The assignment was carried out by Mr. Shawn Moore and Mr. Emanuel Petrache from Kinectrics. A total of 235 measurements were performed covering the entire area of interest and beyond. The measurement results are presented in Table 2-1. Each measurement point was gps marked and the points are presented Figure 2-4 and Figure 2-5. All the measurements were performed at approximately one meter above ground level. A set of measurements were performed along station fence, approximately 1 m outside (see gps points 1 to 77) Several measurement traverses/paths perpendicular to the transmission line were performed as follows: - One traverse by the TL structure #27A (see gps points 78 to 94) - One traverse along the city park fence (see gps 95 to 116) - One traverse crossing the park first basketball court (see gps 117 to 127) - One traverse crossing the park and second basketball court (see gps 128 to 138) - One traverse crossing the playground and the park up to the back alley (see gps 139 to 153) - One traverse crossing the other two basketball courts (see gps 154 to 167) - One traverse east of Runnymede TS by TL structure #28 (see gps points 205 to 213) Two traverses/paths parallel to the transmission line were performed as follows: - One path south of ROW along the back alley (see gps points 168 to 204) - One path north of ROW along the Woolner Ave. north sidewalk (see gps points 214 to 235) The measurement points along the station fence and for each traverse perpendicular to the transmission line were taken at approximately 3 to 4 m intervals. The measurement points parallel to the transmission line were taken at approximately 8 to 10 m intervals. Page 7 of 21

8 Table Hz Magnetic field measurement results # time [UTC/GMT] latitude longitude gps_point Magnetic field [mg] Notes 1 29/05/ : by station fence corner 2 29/05/ : by station fence 3 29/05/ : by station fence 4 29/05/ : by station fence 5 29/05/ : by station fence 6 29/05/ : by station fence 7 29/05/ : by station fence 8 29/05/ : by station fence 9 29/05/ : by station fence 10 29/05/ : by station fence 11 29/05/ : by station fence 12 29/05/ : by station fence 13 29/05/ : by station fence 14 29/05/ : by station fence 15 29/05/ : by station fence 16 29/05/ : by station fence 17 29/05/ : by station fence 18 29/05/ : by station fence 19 29/05/ : by station fence 20 29/05/ : by station fence 21 29/05/ : by station fence 22 29/05/ : by station fence 23 29/05/ : by station fence corner 24 29/05/ : by station fence 25 29/05/ : by station fence 26 29/05/ : by station fence 27 29/05/ : by station fence 28 29/05/ : by station fence 29 29/05/ : by station fence 30 29/05/ : by station fence 31 29/05/ : by station fence 32 29/05/ : by station fence 33 29/05/ : by station fence 34 29/05/ : by station fence 35 29/05/ : by station fence (under distrib line) 36 29/05/ : by station fence Page 8 of 21

9 37 29/05/ : by station fence 38 29/05/ : by station fence 39 29/05/ : by station fence 40 29/05/ : by station fence 41 29/05/ : by station fence 42 29/05/ : by station fence 43 29/05/ : by station fence 44 29/05/ : by station fence 45 29/05/ : by station fence corner 46 29/05/ : by station fence (46=47) 47 29/05/ : by station fence (46=47) 48 29/05/ : by station fence 49 29/05/ : by station fence 50 29/05/ : by station fence 51 29/05/ : by station fence 52 29/05/ : by station fence 53 29/05/ : by station fence 54 29/05/ : by station fence 55 29/05/ : by station fence 56 29/05/ : by station fence 57 29/05/ : by station fence 58 29/05/ : by station fence 59 29/05/ : by station fence 60 29/05/ : by station fence 61 29/05/ : by station fence 62 29/05/ : by station fence 63 29/05/ : by station fence 64 29/05/ : by station fence corner 65 29/05/ : by station fence 66 29/05/ : by station fence 67 29/05/ : by station fence 68 29/05/ : by station fence 69 29/05/ : by station fence 70 29/05/ : by station fence 71 29/05/ : by station fence 72 29/05/ : by station fence 73 29/05/ : by station fence 74 29/05/ : by station fence 75 29/05/ : by station fence Page 9 of 21

10 76 29/05/ : by station fence 77 29/05/ : by station fence 78 29/05/ : traverse by str 27A 79 29/05/ : traverse by str 27A 80 29/05/ : traverse by str 27A 81 29/05/ : traverse by str 27A 82 29/05/ : traverse by str 27A 83 29/05/ : traverse by str 27A 84 29/05/ : traverse by str 27A 85 29/05/ : traverse by str 27A 86 29/05/ : traverse by str 27A 87 29/05/ : traverse by str 27A 88 29/05/ : traverse by str 27A 89 29/05/ : traverse by str 27A 90 29/05/ : traverse by str 27A 91 29/05/ : traverse by str 27A 92 29/05/ : traverse by str 27A 93 29/05/ : traverse by str 27A 94 29/05/ : traverse by str 27A 95 29/05/ : along city park fence 96 29/05/ : along city park fence 97 29/05/ : along city park fence 98 29/05/ : along city park fence 99 29/05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence /05/ : along city park fence Page 10 of 21

11 115 29/05/ : along city park fence /05/ : along city park fence /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : park and 2nd basketball court /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : playground and the park /05/ : by house fence Page 11 of 21

12 154 29/05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : basketball courts by Jane St /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW Page 12 of 21

13 193 29/05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : middle of back alley south or ROW /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : travese by str /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side Page 13 of 21

14 232 29/05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side /05/ : Woolner Ave sidewalk north side Notes: 1) Time recorded is in UTC/GMT: Eastern Daylight Time (EDT) UTC 2) Magnetic field recorded is in milligauss[mg]: 1 milligauss [mg] = millitesla [mt] Figure 2-4 GPS location of the magnetic field measurements: overall view Page 14 of 21

15 Figure 2-5 GPS location of the magnetic field measurements: detailed view of the study area The International Commission on Non-Ionizing Radiation Protection (ICNIRP) has recently published Guidelines for limiting exposure to time-varying electric and magnetic fields (1 Hz to 100 khz) [2]. The guidelines replace previous recommendation given by ICNIRP for this frequency range. They are derived from the current scientific knowledge as described in extensive reviews especially those of the World Health Organization (WHO) and ICNIRP [3]. At power frequency (60Hz) the reference level for the magnetic field is mg for occupational exposure, and mg for general public exposure (see Table 3 and 4 in ICNIRP Guidelines [2]). The reference levels for exposure to time varying magnetic fields (1 Hz to 100 khz) are illustrated in Figure 2-6. Additional information on electric and magnetic fields from power lines and electrical appliances is published by Health Canada [4] Page 15 of 21

16 Figure 2-6 Reference levels for exposure to time varying magnetic fields (taken from [2] Fig. 2) All the 60 Hz magnetic field values recorded at this location were well below the mg ICNIRP reference level for general public exposure. 2.3 Measurement data analysis The magnetic field profiles along the measured traverses/paths in the area of interest are given in Figure 2-7. Obviously, the dominant source of magnetic fields in the Woolner Park area is the transmission line. Other sources of magnetic fields, less significant but noticeable when in close proximity, are the existing distribution lines. The station equipment has a negligible contribution to the magnetic field profiles outside the station fence. Therefore, the Runnymede TS expansion will have a negligible influence on the magnetic field profile in the Woolner Park area. The measured magnetic field values recorded in the Woolner Park area encompassing the basketball courts and the playground varies from 10 mg up to 39.2 mg. The average value recorded in the playground area only is 33.4 mg. The average value recorded taken into account the expanded area encompassing the basketball courts and the playground is 28.4 mg. Page 16 of 21

17 a) b) c) d) e) f) g) h) i) Figure 2-7 Magnetic field profiles along the measured traverses/paths in the area of interest Page 17 of 21

18 3 Assessment of Exposure 3.1 Line loading data The magnetic field density depends on the line geometry and line currents. The amount of current or power transmitted depends on energy consumption and it changes hourly, daily and seasonally. The existing and future circuit loading data is presented in Table 3-1. For each circuit the data is provided for average loading, 85 percentile loading, and 99 percentile loading. Moreover, the loading data at the time of the measurements is also presented. This information was provided by Hydro One. Table 3-1 Circuit loading data Existing Future Circuit name K1W K3W K11W K12W K1W K3W K11W K12W Average over percentile percentile /29/ :25:00s Magnetic field contribution from land use considering the existing conditions As mentioned in Section 2.3, the average magnetic field measured value in the playground area is 33.4 mg. The average magnetic field measured value taken into account the expanded area encompassing the basketball courts and the playground is 28.4 mg. Based on these measurements, the estimated average value at 85 percentile loading reaches 39.7 mg in the playground area, and 33.8 mg considering the expanded area encompassing all the basketball courts and the children playground. The 85 percentile loading value means that currents (and magnetic fields) will be lower than this value 85% of the time. Children playing in the basketball courts and the playground areas 2 hours per day, 5 days a week, 30 weeks a year, resulting in a total estimated exposure duration of 300 hours/year, will increase their yearly average exposure by: 2 hours day 5 days weeks 30 week year 8760 hours 33.8mG = 1.16 mg year Page 18 of 21

19 Assuming children playing only in the small playground where the play structures are located (here the average magnetic field is slightly more elevated) 2 hours per day, 5 days a week, 30 weeks a year, resulting in a total estimated exposure duration of 300 hours/year, their yearly average exposure will increase by: 2 hours day 5 days weeks 30 week year 8760 hours 39.7mG = 1.36 mg year In all scenarios considered for existing conditions the contribution to the child annual average exposure is less than 2 mg. 3.3 Magnetic field contribution from land use considering the future conditions Assumption: As per the information provided by Hydro One to date, it is assumed that the line geometry in the area of interest (i.e. the line spans at Woolner Park) will not change after the conductor restringing. In other words, the conductor positions at the tower and midspan will remain the same. Hydro One should verify this assumption as a different conductor sag will have a noticeable impact the magnetic field levels at the ground level. Based on the measurements results, the estimated magnetic field average value at 85 percentile future loading reaches 43.1 mg in the playground area, and 36.7 mg considering the expanded area encompassing all the basketball courts and the playground. The 85 percentile loading value means that currents (and magnetic fields) will be lower than this value 85% of the time. Children playing in the basketball courts and the playground areas 2 hours per day, 5 days a week, 30 weeks a year, resulting in a total estimated exposure duration of 300 hours/year, will increase their yearly average exposure by: 2 hours day 5 days weeks 30 week year 8760 hours 36.7mG = 1.26 mg year Assuming children playing only in the small playground where the play structures are located (here the average magnetic field is slightly more elevated) 2 hours per day, 5 days a week, 30 weeks a year, resulting in a total estimated exposure duration of 300 hours/year, their yearly average exposure will increase by: Page 19 of 21

20 2 hours day 5 days weeks 30 week year 8760 hours 43.1mG = 1.47 mg year Compared with the existing conditions the future loading will increase the yearly average exposure by 8.4%. The circuit loading at the time when the measurements were performed is very similar to the average loading for future condition. Therefore, the measurement magnetic field values can be used directly without any scaling in the formulas that take the yearly average into account. When the facilities are used year round, the magnetic field values at yearly average loading are more appropriate to be used for the calculation of yearly average exposure. Children playing in the basketball courts and the playground areas 2 hours per day, 5 days a week, year round (52 weeks a year), resulting in a total estimated exposure duration of 520 hours/year, will increase their yearly average exposure by: 2 hours day 5 days weeks 52 week year 8760 hours 28.4mG = 1.69 mg year Assuming children playing only in the small playground where the play structures are located (here the average magnetic field is slightly more elevated) 2 hours per day, 5 days a week, year round (52 weeks a year), resulting in a total estimated exposure duration of 520 hours/year, their yearly average exposure will increase by: 2 hours day 5 days weeks 52 week year 8760 hours 33.4mG = 1.98 mg year In all scenarios considered for future conditions the contribution to the child annual average exposure is less than 2 mg. 4 Conclusions Considering the fact that in all the scenarios considered that take into account the existing and future conditions the contribution to the child annual average exposure is less than 2 mg, and the facilities under study are existent, no action for the reduction of the field exposure is recommended at this location. Page 20 of 21

21 5 References [1] "Guidance Manual for the Preparation of an EMF Management Plan for The City of Toronto," [Online]. Available: mp pdf. [2] "ICNIRP GUIDELINES FOR LIMITING EXPOSURE TO TIME-VARYING ELECTRIC AND MAGNETIC FIELDS (1 Hz TO 100 khz) PUBLISHED IN HEALTH PHYS 99(6): ; 2010". [3] "FACT SHEET ON THE ICNIRP GUIDELINES FOR LIMITING EXPOSURE TO TIME- VARYING ELECTRIC AND MAGNETIC FIELDS (1 Hz TO 100 khz) PUBLISHED IN HEALTH PHYS 99(6): ; 2010," [Online]. Available: [4] [Online]. Available: [ The remainder of this page intentionally left blank. ] Page 21 of 21

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