Phase II Environmental Site Assessment – East End of Chenail Boulevard, Hawkesbury, Ontario
Total Page:16
File Type:pdf, Size:1020Kb
DRAFT REPORT Phase II Environmental Site Assessment – East End of Chenail Boulevard, Hawkesbury, Ontario Presented to: Guillaume Boudrias Project Coordinator Town of Hawkesbury Hawkesbury, ON Project Number: 190441800 August 28, 2020 \\MH.LOCAL\DATA\PROJ\2019\190441800-PHASE II ESA BLVD DU CHENAIL\08. WORKING\2. SUPPLEMENTAL INVESTIGATION\CHENAIL BLVD PHASE II ESA_REV0.DOCX Morrison Hershfield | 2932 Baseline Road, Ottawa, ON K2H 1B1, Canada | Tel 613 739 2910 Fax 613 739 4926 | morrisonhershfield.com i EXECUTIVE SUMMARY Morrison Hershfield Ltd. (MH) was retained by the Town of Hawkesbury (the Client), to perform a Phase II Environmental Site Assessment (ESA) for three (3) property parcels at the eastern end of the Chenail Boulevard (“the site”). A Phase I ESA was not completed for the site prior to this Phase II ESA, but environmental information was obtained from four (4) background reports supplied by the client. Key findings from these reports included the presence of a former railway line that ran across the site, significant infilling activities with suspected material from an industrial site, and use of the site and surrounding area for bulk fuel storage from the 1930’s to 1992. Based on this review, the contaminants of concern (COCs) were identified as metals, Polycyclic Aromatic Hydrocarbons (PAH), Petroleum Hydrocarbons (PHC), and Volatile Organic Compounds (VOC). The environmental field program was performed in three (3) stages, building on the results from the prior stage. A total of fourteen (14) boreholes were drilled, all of which were completed as monitoring wells. Soil and groundwater samples were collected and analyzed for the COCs. Based on the site setting, MECP Table 3 standards for Residential/Parkland/Institutional Property Use were selected to assess the soil and groundwater quality at the site. Fill on the site contains various debris including coal and slag, and contained metals and PAHs at concentrations above the applicable standards. Various petroleum-related contaminants were detected in soil, both at the northern edge of the Chenail Boulevard right-of-way, and south of the right-of-way, at the location of a former fuel oil depot. The petroleum-related contaminants at the northern edge of the Chenail Boulevard right-of- way are thought to be the source of a plume of PHC F3/F4 and PAH in groundwater. This plume appears to extend slightly onto adjacent private properties. The petroleum-related contaminants to the south of Chenail Boulevard, at the former fuel depot, are thought to be the source of a plume of PHC F2 in groundwater that appears fully contained on Town of Hawkesbury property. A preliminary risk evaluation of the groundwater plumes suggests that, in their current state, these plumes are not resulting in any unacceptable risk to on-site receptors. Immediate remedial action is not required. An additional round of groundwater sampling is recommended, along with a targeted additional investigation of shallow fill. The fact that the groundwater contamination appears to extend to adjacent private properties should be disclosed to the MECP. Phase II ESA – East End of Chenail Blvd, Hawkesbury, ON August 2020 ii TABLE OF CONTENTS 1. INTRODUCTION 1 1.1 Site Description 1 1.2 Background Environmental Information 2 1.3 Potentially Contaminating Activities 4 1.4 Scope of Work 5 2. METHODS 6 2.1 Borehole Drilling 6 2.2 Soil Sampling 6 2.3 Field Screening Measurements 7 2.4 Monitoring Well Installation 7 2.5 Groundwater Monitoring and Sampling 7 2.6 Laboratory Analysis of Soil and Groundwater 8 2.7 Residue Management 8 2.8 Elevation Surveying 8 2.9 Quality Assurance/Quality Control 8 3. RESULTS 10 3.1 Site Background 10 3.1.1 Topography and Drainage 10 3.1.2 Geology 10 3.1.3 Hydrogeology 10 3.2 Environmental Field Investigation 10 3.3 Soil Conditions 11 3.4 Groundwater Conditions and Hydrogeology 12 3.5 Applicable Standards 13 3.6 Soil Analytical Results 14 3.7 Groundwater Analytical Results 14 3.8 Quality Assurance/Quality Control 14 4. EVALUATION OF RESULTS 16 4.1 Soil Contamination 16 4.1.1 Metals 16 4.1.2 PAH 16 Phase II ESA – East End of Chenail Blvd, Hawkesbury, ON August 2020 iii 4.1.3 PHC and BTEX 17 4.1.4 VOC 18 4.1.5 TCLP 18 4.2 Groundwater Contamination 18 4.2.1 Metals 18 4.2.2 VOC 18 4.2.3 PAH, PHC and BTEX 19 4.3 Plume 1 Details and Delineation 19 4.4 Plume 2 Details and Delineation 20 4.5 Preliminary Groundwater Risk Evaluation 20 5. CONCLUSIONS 22 6. RECOMMENDATIONS 24 6.1 Additional Groundwater Sampling 24 6.2 Shallow Soil Sampling Program and Remediation 24 7. CLOSURE 25 8. LIMITATIONS AND USE 26 9. REFERENCES 27 LIST OF TABLES Table 1: Property Parcel Details 1 Table 2: Potentially Contaminating Activities 5 Table 3: Summary of Borehole Drilling 6 Table 4: Acceptable RPD Values for Field Duplicates 9 Table 5: Static Water Levels and Groundwater Elevations 12 LIST OF APPENDICES APPENDIX A: Land Registration Map APPENDIX B: Figures APPENDIX C: Borehole Logs APPENDIX D: Analytical Tables APPENDIX E: Laboratory Certificates of Analysis Phase II ESA – East End of Chenail Blvd, Hawkesbury, ON August 2020 1 1. INTRODUCTION Morrison Hershfield Ltd. (MH) was retained by the Town of Hawkesbury (the Client), to perform a Phase II Environmental Site Assessment (ESA) for three (3) property parcels at the eastern end of the Chenail Boulevard. This Phase II ESA was initiated in response to a Phase II ESA completed by Lascelles Engineering & Associates for the adjacent property to the northeast, described as Lots 1 and 17 – Registered Plan M-20, Part of Block 21 – Registered Plan 46M-67, Belle Rive Crescent, Hawkesbury, Ontario. The objective of this Phase II ESA was to investigate the soil and groundwater conditions, to determine if the fuel oil depot that was historically present at these properties has impacted the subsurface and, to attempt to delineate the plume, if groundwater contamination is encountered. This report has been prepared following the principles of the Canadian Standards Association Z769-00 – Phase II Environmental Site Assessment standard and in accordance with generally accepted professional practices. This Phase II ESA is not intended to support the filing of a Record of Site Condition (RSC) under Part XV.1 of the Environmental Protection Act. 1.1 Site Description Four (4) distinct property parcels (labeled Parcel 1, 2, 3 and 4 for convenience) were included in this Phase II ESA investigation. This includes the three (3) parcels that form the eastern end of the Chenail Blvd. An additional parcel, which makes up Belle Rive Street, was also included for potential delineation purposes. These parcels are all owned by the Town of Hawkesbury and additional property details are summarized in Table 1 below. Table 1: Property Parcel Details Distance from Property Area PIN Land Use closest Description ID (m2) Waterbody (m) 0; (northern Irregularly shaped; 54169- 1 2,458 Community boundary abuts the Consists of eastern portion of 0157 Ottawa River) Chenail Blvd right-of-way (ROW) Irregularly shaped; 54169- 90 2 2,460 Community Consists of portions of the Chenail 0153 (Ottawa River) Blvd ROW Irregularly shaped; Parkland 0; (western 54169- Consists of portions of the Chenail 3 18,201 and boundary abuts the 0167 Blvd ROW and the Place des Community Ottawa River) Pionners Municipal Park 54169- 35 Irregularly shaped; 4 3,283 Community 0123 (Ottawa River) Consists of Belle Rive Street ROW Property details are taken from the Ontario Land Registration System. Property information from this source may have some inaccuracies and may not reflect recent property Phase II ESA – East End of Chenail Blvd, Hawkesbury, ON August 2020 2 registrations. Title records or an updated plan of survey are required to confirm the accuracy of property information. The property index map downloaded from the Ontario Land Registration System is shown in Appendix A This map shows all four (4) property parcels, with parcel 2 (PIN 54169-0153) and parcel 3 (PIN 54169-0167) highlighted on the map. The property parcels are also shown on the site plan on Figure 1 in Appendix B. Collectively, these property parcels will be referred to as “the site” throughout this report. 1.2 Background Environmental Information A Phase I ESA was not completed for the site prior to this Phase II ESA. That said, environmental information was obtained from the following reports: Conestoga-Rovers & Associates, 1992. Phase I and II Environmental Audit, Town of Hawkesbury, Ontario. (Report 1) Conestoga-Rovers & Associates Limited, 1992. Remediation of Parts 4 and 8, Town of Hawkesbury, Ontario. (Report 2) Lascelles Engineering & Associates, 2017. Phase I – Environmental Site Assessment Lots 1 and 17 – Registered Plan M-20, Part of Block 21 – Registered Plan 46M-67, Belle Rive Street, Hawkesbury, Ontario. (Report 3) Lascelles Engineering & Associates, 2017. Phase II – Environmental Site Assessment Lots 1 and 17 – Registered Plan M-20, Part of Block 21 – Registered Plan 46M-67, Belle Rive Crescent, Hawkesbury, Ontario. (Report 4) Key findings from these reports are summarized below and presented on Figure 2 in Appendix B: Report 1 A Phase I and II environmental audit was performed for eight (8) parcels of land, adjacent to the Ottawa River (identified as parts 2 to 10 of Registered Plan 46R-4909). This audit was performed to support a land exchange between the Town of Hawkesbury and a developer. As part of this exchange, the Town of Hawkesbury received six (6) parcels, two (2) of which are located within the site and became the present day Chenail Boulevard. The Phase I portion of this audit indicated that a spur line of the former Grand Trunk Railway was located in the vicinity of the site, as early as 1923.