Remedial Action Plan - orillia.ca · plan showing surrounding land use is provided on Figure 2. A Site plan and detailed Site plan are provided on Figure 3.1 and Figure 3.2, respectively

Remedial Action Plan City of Orillia Waterfront Property Centennial Drive, Orillia, Ontario

The Corporation of the City of Orillia

© 2018, Corporation of the City of Orillia. All Rights Reserved. The preparation of this feasibility study was carried out with assistance from the Green Municipal Fund, a Fund financed by the Government of Canada and administered by the Federation of Canadian Municipalities. Notwithstanding this support, the views expressed are the personal views of the authors, and the Federation of Canadian Municipalities and the Government of Canada accept no responsibility for them.

GHD | 111 Brunel Road Suite 200 Mississauga Ontario L4Z 1X3 Canada 11155917| Report No 4 | April 26, 2018

GHD | Remedial Action Plan | 11155917 (4) | Page i

Table of Contents

1. Introduction ................................................................................................................................... 1

2. Site Description ............................................................................................................................ 1

2.1 Site Description .................................................................................................................. 1

2.2 Summary of Environmental Due Diligence Activities ......................................................... 3

2.2.1 Phase One Environmental Site Assessment .................................................... 3 2.2.2 Phase Two Environmental Site Assessment .................................................... 4

3. Physical Conditions ...................................................................................................................... 4

3.1 Stratigraphy ........................................................................................................................ 4

3.2 Hydrogeology ..................................................................................................................... 5

4. Nature and Extent of Impact ........................................................................................................ 6

4.1 Soil Quality ......................................................................................................................... 6

4.2 Groundwater Quality .......................................................................................................... 6

5. Evaluation of Remedial Options ................................................................................................... 7

6. Evaluation of Viable Options ........................................................................................................ 9

6.1 Viable Options .................................................................................................................... 9

6.2 Next Steps ....................................................................................................................... 14

Figure Index Figure 1 Site Location Map

Figure 2 Site Plan & Surrounding Land Use

Figure 3.1 Detailed Site Plan and Investigative Locations

Figure 3.2 Detailed Site Plan and Investigative Locations

Figure 4 Proposed Development Concept

Figure 5.1 Geological Cross Section Locations

Figure 5.2a Geological Cross Section – A-A’ (0 to 225)

Figure 5.2b Geological Cross Section – A-A’ (225 to 450)

Figure 5.3 Geological Cross Section – B-B’

Figure 6.1 Groundwater Elevation Contours – Fill/Silt Deposit (March 22, 2018)

Figure 6.2 Groundwater Elevation Contours – Sand Deposit (March 22, 2018)

Figure 7.1 Summary of Soil Analytical Results

GHD | Remedial Action Plan | 11155917 (4) | Page ii

Figure 7.2 Horizontal Extent of Soil Impacts (PAHs)

Figure 7.3 Horizontal Extent of Soil Impacts (PHCs)

Figure 8.1 Summary of Groundwater Analytical Results

Figure 8.2 Horizontal Extent of Groundwater Impacts (VOCs)

Figure 8.3 Horizontal Extent of Groundwater Impacts (Metals/Inorganics)

Figure 9 Summary of Impacts (Soil/Groundwater)

Table Index Table 1 Evaluation of Remedial Options

Appendix Index

Appendix A Proposed Development Concept

Appendix B Qualitative RA Approach Screening

GHD | Remedial Action Plan | 11155917 (4) | Page 1

1. Introduction

GHD was retained by The Corporation of the City of Orillia (City) to prepare a Remedial Action Plan (RAP) for the City-owned waterfront property located on Centennial Drive in Orillia, Ontario (hereinafter referred to as the Site or Property). A Site Location Map is provided on Figure 1. A Site plan showing surrounding land use is provided on Figure 2. A Site plan and detailed Site plan are provided on Figure 3.1 and Figure 3.2, respectively.

The Site is currently owned by the City. The RAP was undertaken to review and identify feasible remedial solutions to manage the impacts to soil and/or groundwater present on Site in support of the City’s planning, design, and divestment strategy related to the redevelopment of the Site. The proposed development concept for the City’s waterfront is presented on Figure 4 and in Appendix A. As a flow through contamination condition is likely existing at the Site, the environmental condition on the upgradient adjacent property 70 Front Street North was considered during the development of the RAP for the Site. The environmental site assessments were undertaken in support of a larger initiative being undertaken by the City to revitalize the downtown area and improve access to the existing waterfront.

This RAP has been prepared for the City and may not be relied upon by others without written concurrence from the City and GHD.

2. Site Description

2.1 Site Description

The Site is a City-owned waterfront property that is comprised of several parcels of land between the eastern boundary of 70 Front Street North and Centennial Drive, and between Mississaga Street East and Tecumseth Street including 139 Tecumseh Street and 210 Mississaga Street East (hereinafter referred to as the Site or Property).

The Site is irregular in shape, approximately 2.14 hectares (5.3 acres) in size and is located in an area of Orillia that was first developed for residential, commercial and industrial purposes in the late 1890s/early 1900s. The Site is bounded to the north by Tecumseth Street and further to the north by residential dwellings. The Site is bounded to the west by residential and commercial buildings (including 88/92 and 91 Laclie Street), Laclie Street, and a commercial plaza (70 Front Street North) and further to the west by Front Street North and residential and commercial buildings beyond. The Site is bounded to the south by Centennial Drive, Mississaga Street East, commercial buildings and the Royal Canadian Legion Branch 34. Further to the south is vacant land, residential and commercial buildings. The Site is bounded to the east by Centennial Drive, parkland and the Port of Orillia and further to the east by Lake Couchiching.

The Site is located in the heart of the City’s downtown waterfront (Lake Couchiching) and has a history of industrial and commercial uses dating back to at least the late 1890s/early 1900s. Infilling of Lake Couchiching (including portions of the Site) was undertaken in the late 19th and early 20th century. An interconnected series of railway tracks formerly traversed the Site and serviced the


various lumber mills, grain mills, and associated warehouses that were located on and in close proximity to the Site.

The eastern portion of the Site, in the area of the former railway tracks, is currently comprised of a raised gravel trail, which is utilized as an unofficial trail by the public. Gravel covered areas are also located on the eastern portion of the Site and are utilized for vehicle and boat trailer parking for Centennial Park. The western portion of the Site, in the area of the former railway tracks is predominantly grass-covered, with some trees and shrubs along the central and western portions of the Site. Two small portable snack concessions (Stingers Fry Hive and Sweet Dreams Ice Cream) are located on the central portion of the Site, on the gravel-covered portion of the Site. A dirt and gravel roadway, oriented in a north to south direction, bisects the northwestern portion of the Site, connecting Neywash Street to Tecumseth Street. A gravel parking area, used by the residential houses fronting onto Laclie Street, is located west of the roadway on the northern portion of the Site.

Electricity for the Site is supplied underground by Orillia Power Corporation to the street lighting on the southeastern portion of the Site. A pad-mounted transformer is located on the southern portion of the Site. Electricity is also supplied overhead to one of the snack concessions (Sweet Dreams Ice Cream) located on the central portion of the Site. This concession is also serviced with potable water through the municipal water distribution system. A fire hydrant, located on the eastern boundary of the central portion of the Site, is also connected to the municipal water distribution system. Potable water for the City of Orillia is obtained from Lake Couchiching and groundwater supply wells. The Site is located in an area designated by the City as an “intake protection zone” (IPZ) to protect the source water for the municipal system. As such, a potable groundwater situation would apply to the Site.

Underground municipal storm and sanitary sewer services traverse the Site. A municipal sanitary sewer bisects the Site, in a north to south direction. There are also multiple municipal storm and sanitary sewers that traverse across the Site in a west to east direction directly east of Neywash Street and Coldwater Street East, respectively.

Based on historical information provided, a stormwater treatment system (Vortechs System) was installed on Site directly east of Neywash Street in 2010. Prior to the installation of the system, stormwater from the municipal system servicing Neywash Street was discharged to an open drainage swale on the Site. Stormwater runoff on the site flows overland toward the east and west Property boundaries. Stormwater runoff also flows toward the centre of the Site at some locations, between the east and west former railway lines, where it infiltrates to the underlying soils. Storm water runoff that flow to catchbasins, located at the south and central portions of the Site, convey stormwater to storm sewers that discharge to Lake Couchiching.

The soils underlying the Site consist predominantly of sand, gravelly sand and gravel; nearshore and beach deposits0 F

1. According to the Bedrock Geology of Ontario, Map 2544, the bedrock

1 MNR NRVIS, 2018. Surficial Geology. Ontario Ministry of Natural Resources and Forestry; Ontario Geological

Survey 2003. Surficial geology of southern Ontario; Ontario Geological Survey, Miscellaneous Release - Data 128.


underlying Site soils is composed of shale, limestone, dolostone, arkose, and sandstone bedrock of the Simcoe Group1F

2.

The Site topography is relatively flat with gentle slopes towards the eastern and western property boundaries. The elevation on the Site is approximately 221 metres above sea level (mAMSL)2F

3. Regional topography slopes to the southeast. The nearest surface water body to the Site is Lake Couchiching, located approximately 35 to 50 metres to the east of the Site. There is no natural surface water body located on the Property. However, as previously discussed, portions of the Site were historically part of Lake Couchiching. Regional groundwater flow is in a south to southeasterly direction.

The Site is not be considered an area of natural significance as defined in Ontario Regulation 153/04.

2.2 Summary of Environmental Due Diligence Activities

2.2.1 Phase One Environmental Site Assessment

A Phase One ESA3F

4 was completed in 2018 by GHD. Based on the results of the Phase One ESA, several PCAs were identified to be associated with the Site and historical operations on adjacent and surrounding properties to the north, west and south as follows:

• Infilling of Lake Couchiching (identified in this report as APEC #1).

• Former Use of Coal & Demolition Wastes (identified in this report as APEC #2).

• Former Railway and Spur Lines (identified in this report as APEC #3).

• Former Service Station/Autobody Shop (88/92 Laclie Street) (identified in this report as APEC #4a and b).

• USTs (Former Boat Livery) (identified in this report as APEC #5).

• Historical Off-Site Operations (identified in this report as APEC #6).

• Groundwater Impacts (70 Front Street North) (identified in this report as APEC #7).

• Utility Corridor (Neywash Street) (identified in this report as APEC #8).

• Train Derailment/Fuel Spill (identified in this report as APEC #9).

• Former Use of Fuel Oil (identified in this report as APEC #10).

• Transformer Use (identified in this report as APEC #11).

The locations of the APECs are presented on Figures 3.1 and 3.2.

2 Ontario Geological Survey (1991), Bedrock Geology of Ontario, Southern Sheet – Map 2544, Scale 1:1,000,000. 3 Natural Resources Canada [map]. "The Atlas of Canada - Toporama", governed by version 2.3 of the Open

Government License - Canada. June 14, 2016. < http://atlas.nrcan.gc.ca/toporama/en/index.html>. 4 GHD – Phase One Environmental Site Assessment, City of Orillia Waterfront Property, Centennial Drive, Orillia,

Ontario, dated April 27, 2018.


2.2.2 Phase Two Environmental Site Assessment

In March 2018, GHD completed a Phase Two ESA4F

5 to investigate soil and groundwater quality in the vicinity of APECs #1 to #10. The Phase Two ESA included the advancement of boreholes, installation of monitoring wells, field screening, and the collection and laboratory analysis of soil and groundwater samples as follows:

• Advancement of thirty-two (32) boreholes to depths between 3.05 and 10.05 mBGS.

• Instrumentation of twenty-two (22) of the boreholes as groundwater monitoring wells in the overburden to depths between 4.3 and 10.06 mBGS. Field screening of soil and groundwater samples.

• Collection of groundwater levels from on-Site monitoring wells to determine depth to the groundwater table and groundwater flow direction.

• Laboratory analysis of soil and groundwater samples. Soil samples were submitted for laboratory analysis of one or more of the following: O. Reg. 153/04 metals and inorganics, petroleum hydrocarbons (PHC) fractions F1 to F4, volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), Electrical Conductivity (EC), Sodium Adsorption Ratio (SAR), moisture content, pH, and/or grain size. Groundwater samples were submitted for laboratory analysis of one or more of the following: O. Reg. 153/04 metals and inorganics, PHC fractions F1 to F4, VOCs, PAHs and/or chloride.

• Laboratory analysis of one (1) composite sample for ignitability and toxicity characteristic leaching procedure (TCLP) VOCs, benzo(a)pyrene, and metals and inorganics parameters.

The investigative locations are presented on Figures 3.1 to 3.2. The findings are presented in the following sections.

3. Physical Conditions

3.1 Stratigraphy

The regional topography consists of generally flat surfaces. The Site is located in the broad physiographic region known as the Simcoe Lowlands5F

6. A review of Quaternary geology for the Site indicates glaciolacustrine deposits, which consist predominantly of sand, gravelly sand and gravel; nearshore and beach deposits6F

7. The overburden is underlain by shale, limestone, dolostone, arkose and sandstone bedrock of the Simcoe Group7F

8.

The following subsurface materials and soils were encountered:

5 GHD – Phase Two Environmental Site Assessment, City of Orillia Waterfront Property, Centennial Drive, Orillia,

Ontario, dated April 27, 2018. 6 Chapman, L. J., and D. F., Putnam (1984), "The Physiography of Southern Ontario", Ontario Geological Survey. 7 Ontario Geological Survey (1980), Map P. 2204, Quaternary Geology, Toronto and Surrounding Area,

Scale 1:100,000. 8 Ontario Geological Survey (1991), Bedrock Geology of Ontario, Southern Sheet – Map 2544, Scale 1:1,000,000.


• Silt/Sand & Gravel (Fill) – Earth fill was generally encountered across the entire Site from below ground surface to up to 3.81 mBGS. The average thickness of the fill was approximately 2.75 metres. The fill was generally sand, gravel or silt, and contained varying quantities of brick and wood. SPT ‘N’ values obtained within the earth fill layer varied between 0 blows per 300 mm of penetration to greater than 50 blows per 75 mm of penetration, indicating a variable degree of compaction. The moisture content of the fill samples collected ranged from 6 to 38 percent by weight.

• Silt Deposits – A silt deposit was generally encountered beneath the fill and extended to depths ranging from 3.6 to 8.5 mBGS. The silt had varying amounts of sand and ranged in composition from sandy silt to silty sand. The deposit was generally grey in colour and the grain size increased with depth.

• Sand Deposits – A sand deposit was encountered beneath the silt deposit or beneath the fill (in locations where the silt deposit was not present) and continued to the maximum depth of investigation (10.05 mBGS). The deposit was well-graded and generally brown in colour.

Geological cross sections are presented on Figures 5.1 to 5.3.

3.2 Hydrogeology

The Site is primarily underlain by fill and silt/sand deposits as follows.

• Fill (marginal perched Aquifer) – Based on the field observations during drilling the fill is typically moist to wet. The fill may form local, marginal perched aquifer conditions.

• Silt Deposit (Aquitard) – The silt deposit generally forms a low permeability aquitard, which limits groundwater flow and recharge.

• Sand Deposit (Aquifer) –The sand deposit forms a semi-confined aquifer as heaving sands were encountered in this deposit during borehole advancement.

The water table is primarily in the fill. Groundwater elevation contours are presented on Figure 6.1 (shallow (fill/silt deposit) – March 22, 2018) and Figure 6.2 (intermediate (sand deposit) – March 22, 2018).

Based on the March 22, 2018 monitoring event, the water table in the fill/ ranged in elevation from approximately 219.06 to 219.42 mAMSL and ranged in depth from approximately 1.09 to 2.33 mBGS. On March 22, 2018, groundwater flow was generally in a southeasterly direction, with an eastward component within the vicinity of the Neywash Street utility services, which bisect the Site in a west to east direction. Groundwater flow in the confined sand deposit was found to be in a southerly direction.

The average horizontal groundwater gradient of the water table is approximately 0.004 metres per metre (m/m), based on the difference in groundwater level elevations perpendicular to groundwater flow across the Site (219.41 – 219.28 mAMSL/ 32 m = 0.004) for MW8-18 and MW9A-18 on March 22, 2018. The vertical groundwater gradient for the five nested monitoring wells (MW6A/B-18, MW9A/B-18, MW10A/B-18, MW16A/B-18, and MW17A/B-18) varies between approximately 0.007 m/m upwards and 0.031 m/m downwards.


4. Nature and Extent of Impact

The investigative locations are shown on Figures 3.1 and 3.2. The analytical data was assessed to the 2011 MOECC Table 6 Generic Site Condition Standards for Shallow Soils in a Potable Ground Water Condition for coarse textured soils. For comparative purposes, the results were also compared to the 2011 MOECC Table 2 Full Depth Generic Site Condition Standards in a Potable Ground Water Condition for coarse textured soils. The findings are presented below.

4.1 Soil Quality

Based on the findings of the Phase Two ESA, concentrations of PHC fraction F3 and PAHs (including 1+2-Methylnaphthalene, acenaphthene, anthracene, benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo(g,h,i)perylene, benzo(k)fluoranthene, chrysene, dibenz(a,h)anthracene, fluoranthene, indeno(1,2,3-cd)pyrene, naphthalene, phenanthrene) were detected at concentrations above the 2011 MOECC Table 6 and Table 2 Standards for residential/parkland/institutional (RPI) property use for coarse textured soils. The soil impacts were primarily limited to the fill.

PAH concentrations above the MOECC Standards were found in the fill encountered on the northwestern portion of the Site in the area of the former western railway line (MW02-18, BH03-18, BH04-18, and MW07-18) and at MW14-18 on the southeastern portion of the Site in the area of the former eastern railway line. The highest PAH concentrations in soil were detected at MW02-18, in the northwest corner of the Site (refer to Figures 7.1 and 7.2).

The PAH concentrations above the MOECC Table 6 and 2 Standards were found at depths ranging from ground surface up to 1.22 mBGS. The PAH impacts to soil are likely associated with APEC #2 (Former Use of Coal & Demolition Wastes) and APEC # 3 (Former Railway & Spur Lines).

PHC F3 was detected at a concentration of 470 µg/g, above the MOECC Table 6 and 2 Standard of 300 µg/g in the fill at one location (MW02-18) advanced on the northwest portion of the Site at a depth of 0.6 to 1.2 mBGS. The PHC impacts to soil were interpreted to be associated with APEC #2 and APEC #3.

The concentrations of all parameters analyzed were below the MOECC Table 6 and Table 2 Standards within the silt and sand deposits underlying the fill indicating that the PAH and PHC impacts are limited to the fill. No other soil impacts were identified which were interpreted to be associated with the other APECs investigated on the Site.

The soil concentrations above the 2011 MOECC Table 2 and 6 Standards are summarized on Figures 7.1 to 7.3.

4.2 Groundwater Quality

Based on the findings of the Phase Two ESA, barium, toluene, and chlorinated VOCs were detected at concentrations above the 2011 MOECC Table 6 and Table 2 Standards. On the southern portion of the Site, chlorinated VOC impacts to groundwater were detected in both the


shallow overburden (fill/silt deposit) and deeper overburden (sand deposit). The groundwater analytical results for the Site are summarized on Figures 8.1 to 8.3.

In the fill/silt deposit, barium was detected at a concentration of 1,290 µ/L, above the MOECC Table 6 and Table 2 Standards (1,000 µg/L) at one location (MW12-18), located on the southwestern portion of the Site. The source and vertical extent of the barium impacts to groundwater on Site is not fully known. Although, barium impacts to groundwater are also present on the adjacent property to the west (70 Front Street North) (APEC #7).

Toluene was detected at a concentration of 26.2 µg/L at MW15-18 in the fill/silt deposit, marginally above the MOECC Table 2 and Table 6 standard of 24 µg/L. The source and vertical extent of the toluene impacts to groundwater on Site is also not fully known and may potentially be attributable to APEC #6 (Historical Off-Site Operations).

Chlorinated VOCs (tetrachloroethene, trichloroethene and breakdown products cis-1,2-Dichloroethene and/or vinyl chloride) were detected at concentrations above the MOECC Table 6 and Table 2 Standards in the fill/silt deposit at MW12-18 and MW16A-18 and in the deeper sand deposit at MW16B-18, MW10B-18, and MW17B-18, located on the southwest portion of the Site, adjacent to the 70 Front Street North property to the west.

MW12-18 and MW16A-18 are screened over the fill and sand/silt interface between 219.07 and 216.02 mAMSL (1.27 to 4.27 mBGS). MW10B-18, MW16B-18, and MW17B-18 are screened in the sand deposit between 214.77 and 211.29 mAMSL (5.94 and 8.99 mBGS). The vertical and horizontal extent of the groundwater impacts on Site have not been fully defined and may extend beyond 8.99 mBGS. However, the impacts appear to be limited to the southern portion of the Site.

VOC impacts to groundwater are present on the adjacent property to the west of the Site (70 Front Street North) in both the fill, silt and sand deposits. The groundwater analytical results for 70 Front Street North have also been presented on Figures 8.1 to 8.3 for reference.

Based on the March 2018 sampling results for 70 Front Street North, metals, inorganic, and VOC impacts to groundwater were identified on the northeastern portion and southern portion of the 70 Front Street North property. The chlorinated VOC impacts to groundwater are likely related to APEC #7 (70 Front Street North). The chlorinated VOC groundwater impacts on the Site appear to have migrated from the 70 Front Street North property on to the Site via groundwater flow. The VOC impacts on the Site are likely a flow through condition from a VOC release on the 70 Front Street North property.

Based on the groundwater analytical results, there was no evidence of groundwater impacts associated with the other APECs investigated on the Site.

5. Evaluation of Remedial Options

The Site and a portion of the adjacent property to the west of the Site (70 Front Street North) are proposed to be redeveloped for residential land use. The proposed development concept is presented on Figure 4 and Figure 9. The proposed development concept for the Site includes town houses, live work town homes, and cottage homes with associated garages, laneways and a road


network. It is GHD’s understanding that City’s timeline for tendering the development of the Site is mid-2019 to late 2020.

Based on a review of all available information (summarized herein), potential remedial options were screened to identify viable options to address the soil and groundwater impacts on Site that considered the following:

• Future land-use.

• Nature, extent, and location of contaminants of concern.

• Volume of soil requiring remediation.

• Clean-up standards required.

• Timing required to remediate the contaminants to meet the clean-up standards.

• Timing to obtain approvals (regulatory approval delays).

• Physical constraints (e.g., buildings, utilities, property ownership/access, surface water use, and receptor use).

• Environmental risks/liabilities associated with any residual contamination left-in-place.

• Costs, both capital and long term operation and maintenance costs.

• Likely Risk Management Measures (RMM) and Certificate of Property Use (CPU) restrictions for various media/impacts/property uses.

• Funding availability.

The current development concept and RSC strategy options (i.e., single versus multiple) were also considered. To support the redevelopment of the Site for residential land use, an RSC or multiple RSCs will be required to be filed on the Environmental Site Registry in accordance with Ontario Regulation 153/04. To support filing of an RSC(s), the soil and groundwater on Site must either meet the applicable MOECC generic standards or property-specific standards (PSSs) developed through a MOECC approved RA. The vertical and horizontal extent of impact will also need to be fully defined in support of the RA and/or RSC. To maximize the development opportunities for the Site, the decision to divide the Site into several RSC parcels is largely driven by the limitations of the risk management measures (RMMs) requirements determined through the RA process. If an RA is prepared for the Site, then there may be some requirements or conditions that will be associated with future development that will be stipulated on a Certificate of Property Use (CPU) issued for the Site.

Based on the data currently available, the estimated areas and volumes of impacted soil are as follows and are presented on Figure 7.1:


Area Thickness of Impact

Estimated Area (m2)

Estimated Volume (m3)

Estimated Tonnage

Contaminants of Concern

Northwestern portion of the

Site 1.5 7,900 11,900 23,800(1) PAHs & PHC

F3

Southeastern Portion of the

Site 1.5 1,900 2,900 5,800(1) PAHs

Total 29,600 Notes (1) –Assuming soil density of 2.0 tonnes/m3

The area of groundwater impact on Site is presented on Figure 8.1 and the VOC impacts in groundwater on Site extend up to a depth of 8.99 mBGS and may extend beyond. The source and horizontal and vertical extent of impact have not been fully defined.

The remedial options/risk management measures evaluated included the following:

• Risk Assessment.

• Excavation and off Site disposal.

• In-situ and ex-situ treatments.

• Combination of multiple options.

The viability of each of the options is presented below.

6. Evaluation of Viable Options

6.1 Viable Options

The following options were evaluated for the Site:

Option 1: Risk Assessment (Entire Site).

Option 2: Excavation /Off-site Disposal of Soil and Risk Assessment (Entire Site).

Option 3: Focused Excavation/Off-site Disposal of Soil and Risk Assessment (Southern Portion of Site).

Remediation/ Management Options

Viability

Soil Contamination Groundwater Contamination

Risk Assessment Approach Yes Yes

Excavation & Off-Site Disposal Yes No

In-Situ Remediation Techniques NA Yes (but not as a standalone option)

Ex-Situ Remediation Techniques NA Yes (but not as a standalone option)


Option 4: Focused Excavation/Off-site Disposal of Soil and Focussed Groundwater Remediation and Risk Assessment (Southern Portion of Site).

For all of the above options, further investigative activities would be required to investigate the source of the VOC groundwater impacts, delineate the extent of the impacts both vertically and horizontally in accordance with O. Reg. 153/04 to support the filing of an RSC or RSC(s), and to refine the volume of the soil that may require off Site excavation and disposal.

In addition, if the Site is managed on its own, some form of boundary control either on the Site or off Site on the upgradient 70 Front Street North property, will be required for all options to prevent the migration and/or reduce the concentrations of VOCs as groundwater flows onto the Site. This may include monitoring or the installation of a permeable reactive barrier wall (PRB), where feasible.

An overview of each option is presented below. The advantages and disadvantages of each option and ball park cost estimates and anticipated timelines are presented in detail in Table 1.

Option 1: Risk Assessment

Through the RA process, both the soil and groundwater impacts on Site could be managed and risk management measures (RMMs) and property specific standards (PSS) would be developed. There are two primary approaches for RAs – a Tier 2 (“Modified Generic”) RA and a Tier 3 RA. The Tier 2 RA is a streamlined process that relies on an Approved Model spreadsheet established by the MOECC. Under the Tier 2 RA model, several assumptions underlying the assessments of human and ecological risks, as well as the RMMs (i.e., engineering and administrative controls), have been standardized by the MOECC and are not adjustable. The Tier 3 RA is more Site specific than a Tier 2 RA and allows greater technical flexibility in assessment and in the development of the RMMs. The Tier 2 RA approach has a shorter MOECC review time (typically a one year process) and has lower capital costs to complete in comparison to the Tier 3 RA approach (typically a multi-year process).

GHD assessed the viability of completing a Tier 2 RA approach for the Site based on the Site specific characteristics and the nature and contaminants of concern, in both soil and groundwater. Based on GHD’s evaluation (presented in Appendix B), a Tier 2 RA approach for the Site would not be acceptable to MOECC given the following:

• The Site is located within an area designated by the City as an “intake protection zone” (IPZ) to protect the source water for the municipal system. As such, the generic RMM that prohibits groundwater use on-Site as drinking water in the MOECC’s Approved Model is not considered sufficient to manage potential drinking water ingestion risks due to barium, cis-1,2-DCE, PCE, TCE, and VC in groundwater, and benzo(a)pyrene, chrysene, fluoranthene, and phenanthrene in soil.

• The RMMs for indoor air inhalation in MOECC’s Approved Model only allow for a maximum improvement of 200 times over generic values protective of residential indoor air inhalation exposures. Maximum and Reasonable Estimated Maximum (REM) concentrations of cis-1,2-DCE, PCE, TCE, and VC exceeded 200 times these component values, and the Tier 2 RMMs to protect indoor air are therefore considered insufficiently protective.


• The maximum and REM concentrations of anthracene in soil exceed the applicable Site-specific value that is protective of leaching from soil to groundwater, followed by exposure of aquatic life in Lake Couchiching, such as fish and aquatic invertebrates, to that groundwater. No RMMs are available in the Tier 2 model to mitigate the potential risks due to this type of exposure.

Based on the above, a Tier 3 RA approach would apply to the Site. Under the Tier 3 RA, a Risk Management Plan (RMP), which outlines the RMMs and monitoring requirements, would be required. Without addressing the source of and the VOC impacts on 70 Front Street North, there would be a risk that concentrations of VOCs in groundwater may increase over time. As such, based on the results of the Tier 3 RA, some form of boundary control/contingency plan may be required for the Site as part of the RMP to confirm the concentrations are not increasing over time and the acceptable limits. At a minimum this RMM may require a groundwater monitoring program and indoor air monitoring.

GHD completed a preliminary qualitative risk evaluation of the current data available for the Site to determine further likely RMM requirements in addition to the boundary control program outlined above. As a flow through contamination condition is likely existing at the Site, the maximum concentrations of the contaminants in the groundwater on the upgradient adjacent property 70 Front Street North were also considered for the Site. The salient findings are presented below:

• The Site is located in an IPZ designated area. Drinking water ingestion risks are not expected for the contaminants of concern (COCs), with the possible exception of TCE in groundwater and certain PAHs in soil. A more detailed hydrogeological and/or hydrological model in the context of a Tier 3 RA would be required to demonstrate whether the TCE and PAH impacts on Site would affect the drinking water intake in Lake Couchiching.

• Due to the presence of naphthalene and acenaphthene impacts in the soil and VOC impacts in the groundwater, it was determined that any buildings that are constructed on the Site will require risk management measures to protect building inhabitants from inhalation vapours originating from the subsurface, including basement restrictions, underground parking (if feasible) or potentially a level of parking at grade, a vapour barrier, and/or a Subsurface Vapour Intrusion Mitigation System (SVIMS), among other RMMs.

• A cap or barrier to soil exposure is expected to be required to prevent exposures to humans as well as plants and animals. This cap may take the form of a hard material such as asphalt or paving stones, clean soil, a building slab, or any other suitable barrier material. A Health and Safety Plan (HASP) for subsurface workers is also expected to be required to protect against direct contact with potentially contaminated soils beneath the soil barrier. The HASP would additionally protect subsurface workers from direct contact with potentially contaminated groundwater.

Where RMMs are required, the RMMs apply to the entire RSC/RA property, not just the area of the Site where the impacts are present. Long term monitoring and maintenance requirements would also apply. Future buildings would be restricted to condominium style and/or single family townhomes with property management oversight to ensure implementation and on-going monitoring of RMMs.


The RA/RSC timeline is anticipated to be approximately 2 to 3 years. While the RA approach is an effective relatively low-cost option, if one RA is completed for the entire Site to the support a RSC, the likely RMM requirements to manage the soil and groundwater impacts would limit the development opportunities for the entire Site.

Option 2: Excavation/Off-site Disposal of Soil Site-Wide and Risk Assessment

For this option, soil excavation and off-Site disposal activities would be undertaken Site-wide to address the impacted soils present on Site. The clean-up standard would be the applicable MOECC generic standards. The groundwater impacts on the Site would be managed through the RA process outlined above in Option 1.

This option has a very high capital cost associated with it and there is currently a fair amount of uncertainty on the volume of soil that would require excavation and off Site disposal to meet the generic MOECC standards. This option would only be favorable if the costs associated with the excavation and off Site disposal of impacted soils could be reduced and/or minimized by completing the soil excavation activities in conjunction with Site preparation activities. These activities would likely involve the removal of geotechnically unsuitable materials (which would include the impacted soils) during the excavation of soils for the construction of foundations and other below grade structures for redevelopment of the Site. As groundwater impacts would still remain on Site, the RMMs and development restrictions outlined above for Option 1 would still apply to the entire Site.

The RA/RSC timeline for this option is anticipated to be 2 to 3 years and would be dependent on the timing for the Site preparation works if the soil excavation and disposal costs are to be offset by undertaking the soil excavation in conjunction with the Site preparation works.

Option 3: Focussed Excavation/Off-site Disposal of Soil and Risk Assessment

For this option, soil remediation activities would be focussed on the northern portion of the Site. The impacted soils on the northern portion of the Site would be excavated and disposed of off Site at an approved MOECC facility. The clean-up standard would be the applicable MOECC generic standard. Based on the Phase Two ESA findings, groundwater impacts are not present on the northern portion of the Site. Undertaking focussed soil excavation activities on this portion of the Site would remove the requirement for RMMs. A separate RSC could be filed for the northern portion of the Site following the completion of the soil excavation activities.

The advantage of this option is that it would limit the restrictions for the proposed development to the southern portion of the Site. Free-hold townhomes or single-family dwellings could be constructed on the northern portion of the Site without restriction and the requirement for property management oversight under a condominium corporation. The RSC could be filed for the northern portion of the Property following the completion of the soil remediation activities permitting the initial development on this portion of the property to proceed, independently from the southern portion of the Site.

Similar to Option 2, there are high capital costs associated with the soil excavation and off-Site disposal activities and there is uncertainty on the volume of soil that would require excavation and off Site disposal to meet the generic MOECC standards. The costs associated with the excavation and off Site disposal of impacted soils could be reduced and/or minimized by completing the soil


excavation activities in conjunction with Site preparation activities which may include the removal of geotechnically unsuitable materials (which would include the impacted soils) and excavation of soils for construction of foundations, basements, and other below grade structures during the redevelopment of the northern portion of the Site.

For the remaining portion of the Site (i.e., southern portion), the soil and groundwater impacts could be managed using the RA process outlined above in Option 1 and a separate RSC would be filed for the southern portion of the Site.

The RA/RSC timeline for the southern portion of the Site is anticipated to be 2 to 3 years. The RSC timeline for the northern portion of the Site could be completed within a year. If the soil excavation and disposal costs are to be offset by undertaking the soil excavation activities in conjunction with the Site preparation works, the timing for the RSC filing for the northern portion of the Site would be dependent on the Site preparation works

Option 4: Focused Excavation/Off-site Disposal of Soil and Focussed Groundwater Remediation and Risk Assessment (Southern Portion of Site)

Option 4 is the same as Option 3, with the exception that focussed groundwater remediation activities would be undertaken on the southern of the Site to reduce VOC concentrations in groundwater to levels that would allow the removal of some of the RMMs. Ex-situ remediation technologies such as high vacuum dual phase extraction (HVDPE) could be used to reduce the soil vapour and groundwater concentrations on the southern portion of the Site.

The advantage of this option is that from a development perspective the concentrations could be lowered to levels such that the RMMs would not include building restrictions for the proposed development. While this option would improve the marketability of the Site, it has a high capital cost and long term monitoring costs associated with it. There are also timing considerations related to pilot studies, approvals for on-Site treatment, treatment period, and long-term monitoring to ensure there is no rebound in the concentrations and a risk that the treatment may draw contamination from the 70 Front Street North property onto the Site.

The RA/RSC timeline for the southern portion of the Site for this option would be a minimum of 3 to 4 years.

The selection of the preferred option will be ultimately depend on the marketability of the Property to a developer and the City’s funding and timing considerations. If the Site is managed on its own, all of the remedial options for the Site will require some form of boundary control. The 70 Front Street North lands are also owned by the City and the southern portion of the 70 Front Street North lands are proposed for future residential development as part of the City’s waterfront redevelopment project (refer to Figure 4 and Figure 9). Managing the properties as one would ultimately result in cost savings and remove the requirement for some form of boundary control along the western boundary of the Site.


6.2 Next Steps

The source of the VOC impacts to groundwater on the Site is not fully known. Further investigative activities on the Site (and on the 70 Front Street North property) are required to investigate the source and delineate the extent of impacts. Further investigative activities are also required to support the completion of an RA and filing of RSC(s).

The investigative activities should be completed in a staged approach. Stage 1 should focus on investigating the source of the VOC impacts to groundwater, gathering information to support RA/RSC boundary delineation (i.e., limits of the northern and southern Site parcels described in Options 3 and 4) and to refine the volume of soil that may potentially require off Site disposal.

Based on the results of Stage 1, the viable remedial options should be reviewed to select the preferred remedial strategy. The delineation and investigative activities required in support of the completion of the RA and/or filing of RSC should then be undertaken.


All of Which is Respectfully Submitted,

GHD

Nick Bauer, B. Eng.

Julia Serink, P. Eng., QP(ESA)

Thomas Guoth, P. Eng.

GHD | Remedial Action Plan | 11155917 (4)

Figures

Hwy 12

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St

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Barrie Rd

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Peter St N

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Atherley Rd

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Old Muskoka Rd

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Lakeview Cres

William St

Rosslyn Rd

Emily St

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Cedar Island

Heward Point

Leacock Point

Lake Couchiching

Lake Simcoe

FIGURE 1

11155917 Apr 16, 2018

GIS File: Q:\GIS\PROJECTS\11155000s\11155917\Layouts\004\11155917-00(004)GIS-OT001.mxd

SITE LOCATION MAP

Source: MNRF NRVIS, 2018. Produced by GHD under licence from Ontario Ministry of Natural Resources and Forestry, © Queen's Printer 2018. Coordinate System: NAD 1983 UTM Zone 17N

THE CORPORATION OF THE CITY OF ORILLIAREMEDIAL ACTION PLANCENTENNIAL DRIVE, ORRILIA, ONTARIO

SITE

0 200 400 600Meters

MISSISSAGA STREET EAST

COLDWATER STREET EAST

FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

MATCHEDASH STREET NORTH

TECUMSETH STREET

88/92 LACLIE STREET(FORMER GARAGE SERVICE STATION/USTs)

91 LACLIE STREET(FORMER SERVICE STATION/USTs)

64 FRONT STREET NORTH(FORMER SERVICE STATION/USTs)


70 FRONT STREET NORTH(FORMER CANADA WOOD SPECIALTY)


FORMER BOAT LIVERY USTs

18 FRONT STREET NORTH(FORMER AUTOBODY SHOP)

FORMER BOAT BUILDERS(HUNTER BOATS)

130 COLBORNE STREET EAST(FORMER IMPERIAL OIL LIMITEDSTORAGE YARD - ASTs)


20 FRONT STREET SOUTH(FORMER SALVAGE YARD/UST)

2 FRONT STREET SOUTH(FORMER CHAMPLAIN CLEANERS)

188 MISSISSAGA STREET EAST(FORMER SERVICE STATION/USTs)

21 MATCHDASH STREET SOUTH(FORMER SERVICE STATION/USTs)

181 MISSISSAGA STREET EAST(FORMER LAUNDRY FACILITY)

189 MISSISSAGA STREET EAST(FORMER USTs)

9 FRONT STREET SOUTH(FORMER SERVICE STATION/UST)

36 FRONT STREET SOUTH(LINDSAY CLEANERS)

CAD File: I:\DRAWINGS\11150000s\11155000\11155917\11155917-REPORT\11155917-00(004)\11155917-00(004)GN\11155917-00(004)GN-SC001.DWG

Apr 16, 2018

11155917-00

FIGURE 2

THE CORPORATION OF THE CITY OF ORILLIAREMEDIAL ACTION PLANCENTENNIAL DRIVE, ORILLIA, ONTARIO

SITE PLAN AND SUROUNDING LAND USE

0 30 60 90m 3000.0000 0.3333

LEGENDAPPROXIMATE SITE BOUNDARY250 METRE PHASE ONE ESA STUDY AREA

Source: Microsoft Product Screen Shot(s) Reprinted with permission from Microsoft Corporation, Acquisition Date [unknown], Accessed: 2018

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

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STM

STM

STM

PCA #30PCA #46

PCA #30PCA #46

PCA #30PCA #46

PCA #28

PCA #30PCA #46

PCA #10PCA #28

PCA #28PCA #10

PCA #46

PCA #46

PCA #10PCA #28

PCA #28

PCA #10PCA #28

PCA #46

PCA #10PCA #28

FORMER BATH HOUSE

FORMER CN RAIL LINES

FORMER CP RAIL LINES

FORMER GRAINSTORAGE/GENERAL

MILL

FORMER BATH HOUSE

FORMER PRIVATEBOAT HOUSE

FORMER LUMBERSTORAGE


FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET

FORMER BOATLIVERY USTs

MISSISSAGA

STREET EAST

FORMER SAWMILL(FORMER CANADAWOOD SPECIALTY)

TRANSFORMER

88/92 LACLIE STREET(FORMER GARAGE

SERVICESTATION/USTs)








BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW09A-18MW09B-18

MW10A-18

MW10B-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

0 12.5 25 37.5m 1250.0002 0.8

LEGENDAPPROXIMATE SITE BOUNDARY

APPROXIMATE FORMER SHORELINE (1928 FIP)


APPROXIMATE FORMER BUILDING FOOTPRINT(1928 FIP)

AREAS OF POTENTIAL ENVIRONMENTAL CONCERN (APEC)

APEC #1 - Infilling of Lake Couchiching (PCA #30) (Site Wide)APEC #2 - Former Use of Coal & Demolition Wastes (PCA #58) (Site Wide)APEC #3 - Former Railway and Spur LInes (PCA #46) (Site Wide)APEC #4a & 4b - Former Service Station (88 Laclie Street) (PCA #10 & PCA #28)APEC #5 - USTs (Former Boat Livery) (PCA #28)APEC #6 - Historical Off-Site Operations (PCA #10, PCA #28, PCA #37, PCA #46, PCA #49)APEC #7 - Groundwater Impacts (70 Front Street North) (PCA NA)APEC #8 - Utility Corridor (Neywash Street) (PCA NA)APEC #9 - Train Derailment/Fuel Spill (PCA #28)APEC #10 - Use of Fuel Oil (PCA #28)APEC #11 - Transformer Use (PCA #55)

POTENTIALLY CONTAMINATING ACTIVITIES (AS DEFINED UNDER O. REG. 153/04)(PCA)

PCA #10 - Commercial Autobody ShopsPCA #28 - Gasoline and Associated Products Storage in Fixed TanksPCA #30 - Importation of Fill Material of Unknown QualityPCA #37 - Operation of Dry Cleaning EquipmentPCA #46 - Rail Yards, Tracks, and SpursPCA #49 - Salvage Yard, Including Automobile WreckingPCA #55 - Transformer Manufacturing, Processing, and UsePCA #58 - Waste Disposal and Waste ManagementNA Not applicable


Apr 16, 2018

11155917-00

FIGURE 3.1


DETAILED SITE PLAN AND INVESTIGATIVE LOCATIONS

CURRENT SHORELINE

BOREHOLE

SHALLOW MONITORING WELL

INTERMEDIATE MONITORING WELL

SAN

SAN

SAN

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STM

STM

STM

STM

STM

STM

PCA #30PCA #46

PCA #30PCA #46

PCA #30PCA #46

PCA #28

PCA #30PCA #46

PCA #10PCA #28

PCA #28PCA #10

PCA #46

PCA #46

PCA #10PCA #28

PCA #28

PCA #10PCA #28

PCA #46

PCA #10PCA #28

FORMER BATH HOUSE




MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

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MW10A-18

MW10B-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

0 12.5 25 37.5m 1250.0002 0.8





AREAS OF POTENTIAL ENVIRONMENTAL CONCERN (APEC)

APEC #1 - Infilling of Lake Couchiching (PCA #30) (Site Wide)APEC #2 - Former Use of Coal & Demolition Wastes (PCA #58) (Site Wide)APEC #3 - Former Railway and Spur LInes (PCA #46) (Site Wide)APEC #4a & 4b - Former Service Station (88 Laclie Street) (PCA #10 & PCA #28)APEC #5 - USTs (Former Boat Livery) (PCA #28)APEC #6 - Historical Off-Site Operations (PCA #10, PCA #28, PCA #37, PCA #46, PCA #49)APEC #7 - Groundwater Impacts (70 Front Street North) (PCA NA)APEC #8 - Utility Corridor (Neywash Street) (PCA NA)APEC #9 - Train Derailment/Fuel Spill (PCA #28)APEC #10 - Use of Fuel Oil (PCA #28)APEC #11 - Transformer Use (PCA #55)

POTENTIALLY CONTAMINATING ACTIVITIES (AS DEFINED UNDER O. REG. 153/04)(PCA)

PCA #10 - Commercial Autobody ShopsPCA #28 - Gasoline and Associated Products Storage in Fixed TanksPCA #30 - Importation of Fill Material of Unknown QualityPCA #37 - Operation of Dry Cleaning EquipmentPCA #46 - Rail Yards, Tracks, and SpursPCA #49 - Salvage Yard, Including Automobile WreckingPCA #55 - Transformer Manufacturing, Processing, and UsePCA #58 - Waste Disposal and Waste ManagementNA Not applicable


Apr 16, 2018

11155917-00

FIGURE 3.2


DETAILED SITE PLAN AND INVESTIGATIVE LOCATIONS

CURRENT SHORELINE

BOREHOLE




Apr 16, 2018

11155917-00

FIGURE 4


PROPOSED DEVELOPMENT CONCEPT

0 12.5 25 37.5m 1250.0002 0.8


Source: Preferred Development Concept November 17, 2017, Waterfront - Development section of City of Orillia website Accessed: 2018

GARAGE

TOWN HOUSE

LIVE WORK TOWN HOUSE

COTTAGE HOME GARAGE

COTTAGE HOME

G

TH

L/W

CG

C

SAN

SAN

SAN

SAN

SAN

SAN

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SAN

SAN

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SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










A

A'

B'

B

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH09-18

BH10-18

MW01-18

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MW03-18

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MW05-18MW06A-18MW06AB-18

MW07-18

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MW10B-18

MW11-18

MW12-18

MW13-18

MW17A-18

MW17B-18

MW14-18

MW15-18

BH08-18MW16A-18MW16B-18

0 12.5 25 37.5m 1250.0002 0.8






Apr 16, 2018

11155917-00

FIGURE 5.1


GEOLOGICAL CROSS SECTION LOCATIONS

CURRENT SHORELINE

BOREHOLE



CROSS-SECTION LOCATION

BH

01-1

8 (O

/S 1

6.1)

BH

02-1

8 (O

/S -1

9.1)

BH

03-1

8 (O

/S -1

4.9)

BH

04-1

8 (O

/S -1

2.7)

BH

05-1

8 (O

/S 7

.2)

BH

06-1

8 (O

/S -0

.5)

BH

07-1

8 (O

/S -5

.4)

MW

01-1

8 (O

/S 2

.5)

MW

02-1

8 (O

/S -2

8.3)

MW

11-1

8 (O

/S -2

8.9)

MW

03-1

8 (O

/S 5

.3)

MW

04-1

8 (O

/S 1

6.6)

MW

05-1

8 (O

/S -1

3.0)

MW

06A

-18

(O/S

7.8

)

MW

07-1

8 (O

/S -1

8.4)

MW

08-1

8 (O

/S -2

4.4)

MW

09A

-18

(O/S

-0.8

)

MW

09B

-18

(O/S

-0.8

)

0

ELE

VA

TIO

N (m

AM

SL)

ANORTH

210

220

50 100 150 200 250

215

TEC

UM

SE

TH S

TRE

ET

FORMER GRAIN STORAGE/GENERAL MILL

NEYWASH STREET MA

TCH

LIN

E

219.42 219.25 219.29219.14 219.20 219.31 219.28 219.24 219.41 219.17

SA

NIT

AR

Y S

EW

ER

SA

NIT

AR

Y S

EW

ER

MW

06B

-18

(O/S

7.8

)

219.08 219.11



Apr 16, 2018

11155917-00

FIGURE 5.2a


CROSS-SECTION A-A' ( 0 to 225)

GROUND SURFACE

FILL STRATIGRAPHY LAYER

WELL

WELL SCREEN

DESIGNATION

LEGEND

SHALLOW GROUNDWATER ELEVATION(m AMSL) (DATED MARCH 22, 2018)

292.54

BH

01-1

8 (O

/S 1

6.1)

DISTANCE ALONG BASELINE (m)SCALE: H: 1:800

V: 1:200

m AMSL METRE ABOVE MEAN SEA LEVEL

SILT

SAND

TOPSOIL

GROUNDWATER ELEVATION (m AMSL)

FILL

APPROXIMATE GROUNDWATER FLOW DIRECTION

APPROXIMATE STORM SEWER

APPROXIMATE SANITARY SEWER

INTERMEDIATE GROUNDWATER ELEVATION(m AMSL) (DATED MARCH 22, 2018)

219.24

BH

05-1

8 (O

/S 7

.2)

BH

06-1

8 (O

/S -0

.5)

BH

07-1

8 (O

/S -5

.4)

BH

08-1

8 (O

/S -2

7.4)

BH

09-1

8 (O

/S 0

.8)

BH

10-1

8 (O

/S -1

7.5)

MW

11-1

8 (O

/S -2

8.9)

MW

07-1

8 (O

/S -1

8.4)

MW

08-1

8 (O

/S -2

4.4)

MW

09A

-18

(O/S

-0.8

)

MW

09B

-18

(O/S

-0.8

)

MW

10A

-18

(O/S

-1.3

)

MW

10B

-18

(O/S

-1.1

)

MW

12-1

8 (O

/S -2

2.8)

MW

13-1

8 (O

/S 5

.1)

MW

14-1

8 (O

/S 1

2.3)

MW

15-1

8 (O

/S -9

.3)

MW

16A

-18

(O/S

-27.

1)

MW

16B

-18

(O/S

-27.

2)

MW

17A

-18

(O/S

1.5

)M

W17

B-1

8 (O

/S 1

.9)

200 250 300 350 400 450

210

220

215

MIS

SIS

SA

GA

STR

EE

T

A'SOUTHM

ATC

H L

INE

219.31 219.28 219.24 219.41 219.20

219.19 219.19

219.20

219.19

219.22 219.13 219.13 219.06219.18

219.17

SA

NIT

AR

Y S

EW

ER

SA

NIT

AR

Y S

EW

ER

STO

RM

SE

WE

R

STO

RM

SE

WE

R

COLDWATER STREETEAST EXTENSION



Apr 16, 2018

11155917-00

FIGURE 5.2b


CROSS-SECTION A-A' ( 225 - 450)

GROUND SURFACE


WELL

WELL SCREEN

DESIGNATION

LEGEND


292.54


BH

01-1

8 (O

/S 1

6.1)



V: 1:200

APPROXIMATE GROUNDWATER FLOW DIRECTION

APPROXIMATE STORM SEWER



219.24

SILT

SAND

TOPSOIL

FILL

BH

08-1

8 (O

/S 4

.0)

MW

16A

-18

(O/S

3.3

)M

W16

B-1

8 (O

/S 2

.3)

MW

17A

-18

(O/S

-5.8

)M

W17

B-1

8 (O

/S -7

.4)

0

ELE

VA

TIO

N (m

AM

SL)

210


V: 1:100

220

50

B'EAST

BWEST

210

220

215 215

219.19

SIT

E B

OU

ND

AR

Y

MW

10A

-18

(O/S

14.

09)

MW

10B

-18

(O/S

15.

83)

219.18

SA

NIT

AR

Y S

EW

ER

219.19 219.20219.20 219.18

SANITARY SEWER LATERAL



Apr 16, 2018

11155917-00

FIGURE 5.3


CROSS-SECTION B-B'

GROUND SURFACE


WELL

WELL SCREEN

DESIGNATION

LEGEND


292.54

BH

08-1

8 (O

/S 4

.0)





219.24

SILT

SAND

FILL

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










219.4

219.4

219.3

219.3

219.2

219.

2

219.2

219.1

219.1

219.1

219.0

AMW101

AMW102(219.48) AMW103

(219.18)

AMW104(219.20)

EMW201(219.17)

EMW202(218.89)

EMW301

EMW302

EMW303(218.93)

EMW306(219.19)

EMW307(219.17)

EMW402

MW01-18

MW02-18(219.25)

MW03-18(219.29)

MW04-18(219.14)

MW05-18(219.20)

MW06A-18(219.08)

MW06AB-18

MW07-18(219.31)

MW09A-18(219.41)

MW09B-18

MW10B-18

MW11-18(219.17)

MW12-18(219.13)

MW13-18(219.22)

MW14-18(219.13)

MW15-18(219.06)

MW16B-18

MW17A-18(219.20)MW17B-18

MW08-18(219.28)

219.2

MW16A-18(219.19)

MW10A-18(219.20)

219.0

0 12.5 25 37.5m 1250.0002 0.8






Apr 16, 2018

11155917-00

FIGURE 6.1


SHALLOW GROUNDWATER ELEVATION CONTOURSMARCH 22, 2018

CURRENT SHORELINE



(219.42)

(219.18)

mAMSL METRES ABOVE MEAN SEA LEVEL

GROUNDWATER ELEVATION CONTOUR (mAMSL)219.2GROUNDWATER ELEVATION

GROUNDWATER FLOW DIRECTION

GROUNDWATER ELEVATION NOT INCLUDED INCONTOUR GENERATION

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










219.2

3

219.23

219.22

219.22219.21

219.21 219.20

219.20 219.19

219.19

AMW101

AMW102AMW103

AMW104

EMW201

EMW202

EMW301

EMW302(219.19)

EMW303

EMW306

EMW307

EMW402

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18

MW06AB-18(219.11)

MW07-18

MW08-18

MW09A-18

MW09B-18(219.24)

MW10A-18

MW10B-18(219.18)

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18

MW16B-18(219.19)

MW17A-18

MW17B-18(219.18)

0 12.5 25 37.5m 1250.0002 0.8






Apr 16, 2018

11155917-00

FIGURE 6.2


INTERMEDIATE GROUNDWATER ELEVATION CONTOURSMARCH 22, 2018

CURRENT SHORELINE



(219.24)

(219.11)

mAMSL METRES ABOVE MEAN SEA LEVEL

GROUNDWATER ELEVATION CONTOUR (mAMSL)219.2GROUNDWATER ELEVATION

GROUNDWATER FLOW DIRECTION

GROUNDWATER ELEVATION NOT INCLUDED INCONTOUR GENERATION

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMERBATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH09-18

BH10-18

MW01-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW09A-18MW09B-18

MW10A-18

MW10B-18

MW11-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

MW12-18

BH08-18

BH03-18

Fluoranthene

3/15/20180.61-1.22

1.04

BH04-18

1+2-MethylnaphthaleneNaphthalene

3/15/20180.61-1.22

2.131.10

MW02-18

AcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(g,h,i)peryleneBenzo(k)fluorantheneChryseneDibenz(a,h)anthraceneFluorantheneIndeno(1,2,3-cd)pyrenePHC F3 (C16-C34)Phenanthrene

3/19/20180.61-1.22

8.0315.228.820.926.010.67.6822.82.7358.710.947047.9

MW07-18

1+2-Methylnaphthalene

3/19/20180.00-0.61

1.25

MW14-18

1+2-MethylnaphthaleneNaphthalene

3/16/20180.61-1.22

1.310.647

AREA 2

AREA 1

MW02-18

0 12.5 25 37.5m 1250.0002 0.8




APPROXIMATE FORMER BUILDING FOOTPRINT (1928 FIP)


Apr 16, 2018

11155917-00

FIGURE 7.1


SUMMARY OF SOIL ANALYTICAL RESULTS

CURRENT SHORELINE

BOREHOLE



LOCATIONSAMPLE DATE

SAMPLE DEPTH (m BGS)RESULT (ug/g)PARAMETER

MOECC SOIL STANDARDS

PAH CONCENTRATION ABOVE MOECCTABLE 2 AND TABLE 6 STANDARDS

MW03-18

PHC F3 (C16-C34)

3/16/20180.61-1.22ND(50)

NOTE:(1) Ontario MOECC “Soil, Ground Water and Sediment Standards for use Under Part XV.1

of the Environmental Protection Act”, Dated April 15, 2011. Table 2 Full Depth GenericSite Condition Standards in a Potable Ground Water Condition forResidential/Parkland/Institutional Property Use and Coarse Textured Soils.

(2) Ontario MOECC “Soil, Ground Water and Sediment Standards for use Under Part XV.1of the Environmental Protection Act”, Dated April 15, 2011. Table 6 Generic SiteCondition Standards for Shallow Soils in a Potable Ground Water Condition forResidential/Parkland/Institutional Property Use and Coarse Textured Soils.

PARAMETER TABLE 2 (1) TABLE 6(2)

1+2-Methylnaphthalene 0.99 0.99Acenaphthene 7.9 7.9Anthracene 0.67 0.67Benzo(a)anthracene 0.5 0.5Benzo(a)pyrene 0.3 0.3Benzo(b)fluoranthene 0.78 0.78Benzo(g,h,i)perylene 6.6 6.6Benzo(k)fluoranthene 0.78 0.78Chrysene 7 7Dibenz(a,h)anthracene 0.1 0.1Fluoranthene 0.69 0.69Indeno(1,2,3-cd)pyrene 0.38 0.38Naphthalene 0.6 0.6Phenanthrene 6.2 6.2PHC F3 (C16-C34) 300 300

ESTIMATED AREA OF SOIL IMPACT

SAN

SAN

SAN

SAN

SAN

SAN SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










BH01-18

BH02-18

BH03-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18

MW07-18

MW08-18

MW09A-18

MW10A-18

MW11-18

MW12-18

MW13-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

BH04-18MW06AB-18

MW09B-18

MW14-18

MW10B-18

BH01-18

1+2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(g,h,i)peryleneBenzo(k)fluorantheneChryseneDibenz(a,h)anthraceneFluorantheneIndeno(1,2,3-cd)pyreneNaphthalenePhenanthrene

3/15/20180.61-1.22

0.942ND(0.050)ND(0.050)

0.054ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.099ND(0.050)

0.055ND(0.050)

0.3710.295

BH02-18


3/15/20181.22-1.83

ND(0.042)/ND(0.042)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.013)/ND(0.013)ND(0.046)/ND(0.046)

BH03-18


3/15/20180.61-1.22

0.067/0.109ND(0.050)/ND(0.050)

ND(0.050)/0.0870.120 J/0.306 J0.123 J/0.294 J0.190 J/0.401 J

0.233/0.2390.053/0.126

0.167 J/0.440 JND(0.050)/ND(0.050)

0.247 J/1.04 J0.171/0.214

0.041 J/0.076 J0.134 J/0.894 J

BH04-18


3/15/20180.61-1.22

2.13ND(0.050)ND(0.050)

0.056ND(0.050)

0.056ND(0.050)ND(0.050)

0.103ND(0.050)

0.065ND(0.050)

1.100.371

3/15/20181.22-1.83ND(0.042)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.013)ND(0.046)

BH05-18



BH06-18



BH07-18



BH08-18


3/15/20180.61-1.22

ND(0.042)/ND(0.042)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)

0.019/ND(0.013)ND(0.046)/ND(0.046)

BH09-18


3/15/20180.61-1.22

0.112ND(0.050)ND(0.050)

0.051ND(0.050)

0.087ND(0.050)ND(0.050)

0.079ND(0.050)

0.070ND(0.050)

0.052ND(0.046)

BH10-18




MW01-18


3/19/20180.61-1.22ND(0.042)ND(0.050)ND(0.050)

0.0570.0540.076

ND(0.050)ND(0.050)

0.084ND(0.050)

0.160ND(0.050)ND(0.013)

0.141


MW02-18


3/19/20180.61-1.22

0.3398.0315.228.820.926.010.67.6822.82.7358.710.90.10347.9



MW03-18


3/16/20180.61-1.22

0.312ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.1300.106

MW04-18


3/15/20180.61-1.22

0.973ND(0.050)ND(0.050)

0.1860.1670.3140.1430.0890.250

ND(0.050)0.2740.1430.4350.237


MW05-18


3/16/20180.61-1.22


0.0600.077


MW06A-18




MW07-18


3/19/20180.00-0.61

1.25ND(0.050)ND(0.050)

0.0920.0670.1280.058

ND(0.050)0.131

ND(0.050)0.128

ND(0.050)0.5610.295


MW08-18


3/13/20180.61-1.22ND(0.042)ND(0.050)ND(0.050)

0.0670.0940.1350.1080.0900.088

ND(0.050)0.0700.0840.028

ND(0.046)

3/13/20183.05-3.66ND(0.042)ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.051ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.013)ND(0.046)

MW09B-18



3/12/20187.92-8.53

ND(0.042)/ND(0.042)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.050)/ND(0.050)ND(0.013)/ND(0.013)ND(0.046)/ND(0.046)

MW10B-18




MW11-18


3/13/20180.61-1.22

0.148ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.055ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.075ND(0.046)


MW12-18



MW13-18




MW14-18


3/16/20180.61-1.22

1.31ND(0.050)ND(0.050)ND(0.050)ND(0.050)

0.061ND(0.050)ND(0.050)

0.073ND(0.050)

0.065ND(0.050)

0.6470.224


MW15-18




0 7 14 21m 700.0000 1.4286

Plot Date: CAD File: 16 April 2018 - 2:52 PM I:\DRAWINGS\11150000s\11155000\11155917\11155917-REPORT\11155917-00(004)\11155917-00(004)GN\11155917-00(004)GN-SC009.DWGPlotted By: Coralie Jacobi

Project No.

Source:

Date:

Report No.11155917-00 004

FIGURE 7.2

THE COROPORATION OF THE CITY OF ORILLIAREMEDIAL ACTION PLAN

CENTENNIAL DRIVE, ORILLIA, ONTARIO

HORIZONTAL EXTENT OF SOIL IMPACTSPAHs

April 16, 2018




CURRENT SHORELINE

BOREHOLE




CONCENTRATION ABOVE MOECCTABLE 2 AND TABLE 6 STANDARDS

CONCENTRATION BELOW MOECCTABLE 2 AND TABLE 6 STANDARDS


1+2-Methylnaphthalene 0.99 0.99Acenaphthene 7.9 7.9Anthracene 0.67 0.67Benzo(a)anthracene 0.5 0.5Benzo(a)pyrene 0.3 0.3Benzo(b)fluoranthene 0.78 0.78Benzo(g,h,i)perylene 6.6 6.6Benzo(k)fluoranthene 0.78 0.78Chrysene 7 7Dibenz(a,h)anthracene 0.1 0.1Fluoranthene 0.69 0.69Indeno(1,2,3-cd)pyrene 0.38 0.38Naphthalene 0.6 0.6Phenanthrene 6.2 6.2

MW03-18

1+2-MethylnaphthaleneAcenaphtheneAnthraceneBenzo(a)anthraceneBenzo(a)pyreneBenzo(b)fluorantheneBenzo(g,h,i)peryleneBenzo(k)fluorantheneChryseneDibenz(a,h)anthraceneFluorantheneIndeno(1,2,3-cd)pyrenePhenanthrene

3/16/20180.61-1.22


0.106

LOCATION

SAMPLE DATESAMPLE DEPTH (m BGS)

RESULT (ug/g)

PARAMETER




FIELD DUPLICATE-/-

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

SAN

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

STM

FORMER BATH HOUSE




MILL

FORMERBATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER










BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH09-18

BH10-18

MW01-18

MW03-18

MW04-18

MW05-18MW06A-18

MW06AB-18

MW07-18

MW09A-18

MW10A-18

MW11-18

MW13-18MW16A-18MW16B-18

MW17A-18

MW17B-18

MW12-18

BH08-18

MW02-18

MW15-18

MW14-18

MW08-18MW09B-18

MW10B-18

BH01-18

PHC F3 (C16-C34)

3/15/20180.61-1.22

71

BH02-18

PHC F3 (C16-C34)

3/15/20181.22-1.83

ND(50)/ND(50)

BH03-18

PHC F3 (C16-C34)

3/15/20180.61-1.22

89/66

BH04-18

PHC F3 (C16-C34)

3/15/20180.61-1.22

86

BH05-18

PHC F3 (C16-C34)

3/15/20180.61-1.22ND(50)

BH08-18

PHC F3 (C16-C34)

3/15/20180.61-1.22

ND(50)/ND(50)

BH09-18

PHC F3 (C16-C34)

3/15/20180.61-1.22ND(50)

BH10-18

PHC F3 (C16-C34)

3/15/20180.61-1.22ND(50)

MW01-18

PHC F3 (C16-C34)

3/19/20180.61-1.22ND(50)

MW02-18

PHC F3 (C16-C34)

3/19/20180.61-1.22

470

3/19/20181.22-1.83ND(50)

MW03-18

PHC F3 (C16-C34)

3/16/20180.61-1.22ND(50)

MW04-18

PHC F3 (C16-C34)

3/15/20180.61-1.22ND(50)

MW05-18

PHC F3 (C16-C34)

3/16/20180.61-1.22

61

MW06A-18

PHC F3 (C16-C34)

3/14/20180.61-1.22ND(50)

MW07-18

PHC F3 (C16-C34)

3/19/20180.00-0.61

139

MW08-18

PHC F3 (C16-C34)

3/13/20180.61-1.22ND(50)

MW09B-18

PHC F3 (C16-C34)

3/12/20180.61-1.22ND(50)

MW10B-18

PHC F3 (C16-C34)

3/13/20180.61-1.22ND(50)

MW11-18

PHC F3 (C16-C34)

3/13/20180.61-1.22ND(50)

MW12-18

PHC F3 (C16-C34)

3/15/20180.61-1.22ND(50)

MW13-18

PHC F3 (C16-C34)

3/16/20180.61-1.22ND(50)

MW14-18

PHC F3 (C16-C34)

3/16/20180.61-1.22ND(50)

MW15-18

PHC F3 (C16-C34)

3/14/20180.61-1.22ND(50)

0 12.5 25 37.5m 1250.0002 0.8






Apr 16, 2018

11155917-00

FIGURE 7.3


HORIZONTAL EXTENT OF SOIL IMPACTS (PHCs)

CURRENT SHORELINE

BOREHOLE



LOCATIONSAMPLE DATE

SAMPLE DEPTH (m BGS)RESULT (ug/g)PARAMETER


PHC F3 (C16-C34) 300 300



MW03-18

PHC F3 (C16-C34)

3/16/20180.61-1.22ND(50)

CONCENTRATION BELOW MOECCTABLE 2 AND TABLE 6 STANDARDS




FIELD DUPLICATE-/-

SAN

SAN

SAN

SAN

SAN

SAN

FORMER BATH HOUSE

FORMER CN RAIL LINESFORMER CP RAIL LINES


MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER









130 COLBORNE STREET EAST(FORMER IMPERIAL OIL LIMITED STORAGE YARD - ASTs)




AMW101

AMW102 AMW103

AMW104

EMW201

EMW301

EMW302

EMW306

EMW307

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

EMW303

MW09A-18

MW09B-18

MW10B-18

MW10A-18

EMW402EMW202

EBH305/EMW305

EBH304/EMW304

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

AMW101

BariumChlorideCobaltSodiumVanadium

2/10/2011

120-

5.4380000

5

7/8/2015

119955000ND(3.0)447000ND(5.0)

AMW102


2/10/20112.70-6.10

2000-

305400000

36

7/8/20152.70-6.10

11104950000ND(3.0)3700000ND(5.0)

AMW103

1,1-DichloroetheneBariumChlorideChloroformcis-1,2-DichloroetheneCobaltSodiumTetrachloroetheneTolueneTrichloroetheneVanadiumVinyl chloride

2/10/20113.00-6.10ND(0.2)

3300--

0.36.5

21000000.5-

2.310

ND(0.4)

2/28/20113.00-6.10ND(0.2)

---

ND(0.2)--

ND(0.2)-

ND(0.2)-

ND(0.4)

7/8/20153.00-6.10ND(0.50)

12205260000

-ND(0.50)

4.22780000ND(0.50)

-ND(0.50)ND(5.0)

ND(0.50)

3/20/20183.00-6.10ND(0.50)

--

ND(1.0)3.95

--

0.98ND(0.50)

3.75-

0.58

AMW104


2/10/20112.80-5.80ND(0.2)

1600--

ND(0.2)32

2100001.7-

1.69

ND(0.4)

2/28/20112.80-5.80ND(0.1)

---

ND(0.1)--

0.2-

0.1-

ND(0.2)

7/8/20152.80-5.80ND(0.50)

2330592000

-ND(0.50)

7.39322000

ND(0.50)-

ND(0.50)2.6

ND(0.50)

3/20/20182.80-5.80ND(0.50)

--

ND(1.0)ND(0.50)

--

ND(0.50)ND(0.50)ND(0.50)

-ND(0.50)

EMW201


7/8/20152.05-5.05ND(0.50)

999808000

-23.51.97

383000ND(0.50)

-2.95

ND(0.50)0.85

3/20/20182.05-5.05

0.57--

ND(1.0)62.4

--

ND(0.50)ND(0.50)ND(0.50)

-2.56

EMW202


7/8/20152.15-5.250.66/0.611410/1430

2810000/2830000-

22.7/27.4ND(3.0)/ND(3.0)

1730000/1680000ND(0.50)/ND(0.50)

-26.6/23.4ND(5.0)

0.87/0.96

9/27/20162.15-5.25ND(0.50)

---

8.92--

ND(0.50)-

2.16-

1.55

3/20/20182.15-5.25

0.77--

ND(1.0)59.2

--

3.33ND(0.50)

12.1-

8.23

EMW301


8/31/20151.40-4.60

18303290000

3.21940000ND(5.0)

EMW302

1,1-DichloroetheneChloroformcis-1,2-DichloroetheneTetrachloroetheneTolueneTrichloroetheneVinyl chloride

8/31/20157.70-9.20

0.50-

22.068.2

-273

ND(0.50)

9/27/20167.70-9.20ND(0.50)

-11.959.2

-140

ND(0.50)

3/20/20187.70-9.20ND(0.50)ND(1.0)

6.7150.3

ND(0.50)87.5

ND(0.50)

EMW303


8/31/20151.50-4.60

ND(0.50)/ND(0.50)1050/1070

1300000/1310000-

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)973000/981000

ND(0.50)/ND(0.50)-

ND(0.50)/ND(0.50)ND(5.0)

ND(0.50)/ND(0.50)

3/20/20181.50-4.60ND(0.50)

--

ND(1.0)8.44

--

ND(0.50)ND(0.50)

1.20-

4.63

EMW306


8/31/20151.50-4.60ND(0.50)

-1.0812-

10.2ND(0.50)

3/21/20181.50-4.60

ND(0.50)/ND(0.50)2.4/2.5

0.91/0.887.07/7.09

ND(0.50)/ND(0.50)6.52/6.36

ND(0.50)/ND(0.50)

EMW307


8/31/20151.50-4.60ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)

1.59

3/20/20181.50-4.60ND(0.50)ND(1.0)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

1.12

EMW402


9/27/201612.20-13.70

ND(0.50)-

6.2427.1

-76

ND(0.50)

3/20/201812.20-13.70

ND(0.50)ND(1.0)

7.9146.6

ND(0.50)122

ND(0.50)

MW10B-18


3/14/20185.94-8.99ND(0.50)ND(1.0)

4.2119.60.7626.8

ND(0.50)

MW12-18

1,1-DichloroetheneBariumChloroformcis-1,2-DichloroetheneTetrachloroetheneTolueneTrichloroetheneVinyl chloride

3/21/20181.22-4.27ND(0.50)

1290ND(1.0)

16.215.6

ND(0.50)69.40.86

MW15-18


3/22/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)

26.2ND(0.50)ND(0.50)

MW16A-18


3/22/20181.22-4.27

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)

1.49/1.4920.6/20.2

ND(0.50)/ND(0.50)19.3/18.9

ND(0.50)/ND(0.50)

MW16B-18


3/22/20187.47-8.99ND(0.50)

1.46.5122.9

ND(0.50)67.0

ND(0.50)

MW17B-18


3/22/20185.94-8.99ND(0.50)

1.121.431.20.601020.56


Apr 16, 2018

11155917-00

FIGURE 8.1


SUMMARY OF GROUNDWATER ANALYTICAL RESULTS

0 20 40 60m 2000.0000 0.5

LEGENDAPPROXIMATE SITE BOUNDARYAPPROXIMATE FORMER SHORELINE (1928 FIP)


APPROXIMATE FORMER BUILDING FOOTPRINT (1928 FIP)CURRENT SHORELINE

BOREHOLE




1,1-Dichloroethene 1.6 0.5Barium 1000 1000Chloride 790,000 790,000Chloroform 2.4 2cis-1,2-Dichloroethene 1.6 1.6Cobalt 3.8 3.8Sodium 490,000 490,000Tetrachloroethene 1.6 0.5Toluene 24 24Trichloroethene 1.6 0.5Vanadium 6.2 6.2Vinyl chloride 0.5 0.5

MOECC GROUNDWATER STANDARDS


of the Environmental Protection Act”, Dated April 15, 2011. Table 2 Full Depth GenericSite Condition Standards in a Potable Ground Water Condition for All Types of PropertyUse and Coarse Textured Soils.

(2) Ontario MOECC “Soil, Ground Water and Sediment Standards for use Under Part XV.1of the Environmental Protection Act”, Dated April 15, 2011. Table 6 Generic SiteCondition Standards for Shallow Soils in a Potable Ground Water Condition for All Typesof Property Use and All Soil Textures.


CONCENTRATION ABOVE MOECCTABLE 6 STANDARDS

MONITORING WELL DESTROYED OR NOT FOUND

PARAMETER NOT ANALYZED-

AMW102


2/10/20112.70-6.10

2000-

305400000

36

7/8/20152.70-6.10

11104950000ND(3.0)3700000ND(5.0)

LOCATIONSAMPLE DATE

RESULT (ug/L)

PARAMETER

SCREEN DEPTH INTERVAL

SAN

SAN

SAN

SAN

SAN

SAN

FORMER BATH HOUSE



MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER













AMW101

AMW102 AMW103

AMW104

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

EMW201

EMW301

EMW302

EMW306

EMW307

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

EMW303

MW09A-18

MW09B-18

MW10B-18

MW10A-18

EMW402EMW202

EBH305/EMW305

EBH304/EMW304

AMW101

1,1-Dichloroethenecis-1,2-DichloroetheneTetrachloroetheneTrichloroetheneVinyl chloride

2/10/2011

ND(0.1)ND(0.1)ND(0.1)ND(0.1)ND(0.2)

7/8/2015

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

AMW102


2/10/20112.70-6.10ND(0.2)

-ND(0.2)ND(0.2)

-0.3

ND(0.4)

7/8/20152.70-6.10ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)ND(0.50)

3/20/20182.70-6.10

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)

ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)

AMW103


2/10/20113.00-6.10ND(0.2)

-0.30.5-

2.3ND(0.4)

2/28/20113.00-6.10ND(0.2)

-ND(0.2)ND(0.2)

-ND(0.2)ND(0.4)

7/8/20153.00-6.10ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)ND(0.50)

3/20/20183.00-6.10ND(0.50)ND(1.0)

3.950.98

ND(0.50)3.750.58

AMW104


2/10/20112.80-5.80ND(0.2)

-ND(0.2)

1.7-

1.6ND(0.4)

2/28/20112.80-5.80ND(0.1)

-ND(0.1)

0.2-

0.1ND(0.2)

7/8/20152.80-5.80ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)ND(0.50)

3/20/20182.80-5.80ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

EMW201


7/8/20152.05-5.05ND(0.50)

-23.5

ND(0.50)-

2.950.85

3/20/20182.05-5.05

0.57ND(1.0)

62.4ND(0.50)ND(0.50)ND(0.50)

2.56

EMW202


7/8/20152.15-5.250.66/0.61

-27.4/22.7

ND(0.50)/ND(0.50)-

26.6/23.40.96/0.87

9/27/20162.15-5.25ND(0.50)

-8.92

ND(0.50)-

2.161.55

3/20/20182.15-5.25

0.77ND(1.0)

59.23.33

ND(0.50)12.18.23

EMW301


8/31/20151.40-4.60ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)ND(0.50)

3/20/20181.40-4.60ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

EMW302


8/31/20157.70-9.20

0.50-

22.068.2

-273

ND(0.50)

9/27/20167.70-9.20ND(0.50)

-11.959.2

-140

ND(0.50)

3/20/20187.70-9.20ND(0.50)ND(1.0)

6.7150.3

ND(0.50)87.5

ND(0.50)

EMW303


8/31/20151.50-4.60

ND(0.50)/ND(0.50)-

ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)

-ND(0.50)/ND(0.50)ND(0.50)/ND(0.50)

3/20/20181.50-4.60ND(0.50)ND(1.0)

8.44ND(0.50)ND(0.50)

1.204.63

EMW304


8/31/2015

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

EMW305


8/31/2015

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

EMW306


8/31/20151.50-4.60ND(0.50)

-1.0812-

10.2ND(0.50)

3/21/20181.50-4.60

ND(0.50)/ND(0.50)2.4/2.5

0.88/0.917.09/7.07

ND(0.50)/ND(0.50)6.52/6.36

ND(0.50)/ND(0.50)

EMW307


8/31/20151.50-4.60ND(0.50)

-ND(0.50)ND(0.50)

-ND(0.50)

1.59

3/20/20181.50-4.60ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)

1.12

EMW402


9/27/201612.20-13.70

ND(0.50)-

6.2427.1

-76

ND(0.50)

3/20/201812.20-13.70

ND(0.50)ND(1.0)

7.9146.6

ND(0.50)122

ND(0.50)

MW01-18


3/21/20181.22-4.27

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)


MW02-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW03-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW04-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW05-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW06A-18


3/21/20181.22-4.27ND(0.50)ND(1.0)ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW06B-18


3/21/20186.10-7.62ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW07-18


3/22/20181.22-4.27ND(0.50)ND(1.0)ND(0.50)ND(0.50)

14.3ND(0.50)ND(0.50)

MW08-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW09A-18


3/14/20181.52-4.57ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW09B-18


3/14/20187.01-10.06ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW10A-18


3/14/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW10B-18


3/14/20185.94-8.99ND(0.50)ND(1.0)

4.2119.60.7626.8

ND(0.50)

MW11-18


3/14/20181.22-4.27ND(0.50)ND(1.0)ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW12-18


3/21/20181.22-4.27ND(0.50)ND(1.0)

16.215.6

ND(0.50)69.40.86

MW13-18


3/22/20181.22-4.27ND(0.50)ND(1.0)ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW14-18


3/22/20181.22-4.27

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)


MW15-18


3/22/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)

26.2ND(0.50)ND(0.50)

MW16A-18


3/22/20181.22-4.27

ND(0.50)/ND(0.50)ND(1.0)/ND(1.0)

1.49/1.4920.6/20.2

ND(0.50)/ND(0.50)18.9/19.3

ND(0.50)/ND(0.50)

MW16B-18


3/22/20187.47-8.99ND(0.50)

1.46.5122.9

ND(0.50)67.0

ND(0.50)

MW17A-18


3/22/20181.22-4.27ND(0.50)ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

MW17B-18


3/22/20185.94-8.99ND(0.50)

1.121.431.20.601020.56


Apr 16, 2018

11155917-00

FIGURE 8.2


HORIZONTAL EXTENT OF GROUNDWATER IMPACTS (VOCs)

0 20 40 60m 2000.0000 0.5




BOREHOLE




1,1-Dichloroethene 1.6 0.5Chloroform 2.4 2cis-1,2-Dichloroethene 1.6 1.6Tetrachloroethene 1.6 0.5Toluene 24 24Trichloroethene 1.6 0.5Vinyl chloride 0.5 0.5








MW03-18

1,1-DichloroetheneBariumChloroformcis-1,2-DichloroetheneTetrachloroetheneTolueneTrichloroetheneVinyl chloride

3/21/20181.22-4.27ND(0.50)

84.6ND(1.0)

ND(0.50)ND(0.50)ND(0.50)ND(0.50)ND(0.50)

LOCATIONSAMPLE DATE

RESULT (ug/L)

PARAMETER



SAN

SAN

SAN

SAN

SAN

SAN

FORMER BATH HOUSE



MILL

FORMER BATH HOUSE




FRONT STREET

NEYWASH STREET

PORT OF ORILLIA

CEN

TENN

IAL DR

IVE

CENTENNIAL PARK

LACLIE STREET

LAKE COUCHICHING

TECUMSETH STREET


MISSISSAGA

STREET EAST


TRANSFORMER













AMW101


2/10/2011

120-

5.4380000

5

7/8/2015

119955000ND(3.0)447000ND(5.0)

AMW102


2/10/20112.70-6.10

2000-

305400000

36

7/8/20152.70-6.10

11104950000ND(3.0)3700000ND(5.0)

AMW103


2/10/20113.00-6.10

3300-

6.52100000

10

7/8/20153.00-6.10

12205260000

4.22780000ND(5.0)

AMW104


2/10/20112.80-5.80

1600-

32210000

9

7/8/20152.80-5.80

2330592000

7.39322000

2.6

EMW201


7/8/20152.05-5.05

999808000

1.97383000

ND(0.50)

EMW202


7/8/20152.15-5.251430/1410

2830000/2810000ND(3.0)/ND(3.0)

1730000/1680000ND(5.0)/ND(5.0)

EMW301


8/31/20151.40-4.60

18303290000

3.21940000ND(5.0)

EMW303


8/31/20151.50-4.601050/1070

1310000/1300000ND(1.0)/ND(1.0)973000/981000ND(5.0)/ND(5.0)

MW01-18

Barium

3/21/20181.22-4.27230/226

MW02-18

Barium

3/21/20181.22-4.27

161

MW03-18

Barium

3/21/20181.22-4.27

84.6MW04-18

Barium

3/21/20181.22-4.27

778

MW05-18

Barium

3/21/20181.22-4.27

277

MW06A-18

Barium

3/21/20181.22-4.27

394

MW07-18

Barium

3/22/20181.22-4.27

235

MW08-18

Barium

3/21/20181.22-4.27

290

MW09A-18

Barium

3/14/20181.52-4.57

122

MW10A-18

Barium

3/14/20181.22-4.27

84.1

MW11-18

Barium

3/14/20181.22-4.27

340

MW12-18

Barium

3/21/20181.22-4.27

1290

MW13-18

Barium

3/22/20181.22-4.27

87.0

MW14-18

Barium

3/22/20181.22-4.27137/130

MW15-18

Barium

3/22/20181.22-4.27

291

AMW101

AMW102 AMW103

AMW104

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

EMW201

EMW301

EMW302

EMW306

EMW307

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

EMW303

MW09A-18

MW09B-18

MW10B-18

MW10A-18

EMW402EMW202

EBH305/EMW305

EBH304/EMW304


Apr 16, 2018

11155917-00

FIGURE 8.3


HORIZONTAL EXTENT OF GROUNDWATER IMPACTSMETALS/INORGANICS

0 20 40 60m 2000.0000 0.5




BOREHOLE












Barium 1000 1000Chloride 790,000 790,000Cobalt 3.8 3.8Sodium 490,000 490,000Vanadium 6.2 6.2

AMW103


2/10/20113.00-6.10

3300-

6.52100000

10

7/8/20153.00-6.10

12205260000

4.22780000ND(5.0)

LOCATIONSAMPLE DATE

RESULT (ug/L)

PARAMETER


AMW103

AMW104

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

EMW201

EMW301

EMW302

EMW306

EMW307

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

EMW303

MW09A-18MW09B-18

MW10B-18

MW10A-18

EMW402EMW202

AMW103

AMW104

BH01-18

BH02-18

BH03-18

BH04-18

BH05-18

BH06-18

BH07-18

BH08-18

BH09-18

BH10-18

EMW201

EMW301

EMW302

EMW306

EMW307

MW01-18

MW02-18

MW03-18

MW04-18

MW05-18MW06A-18MW06AB-18

MW07-18

MW08-18

MW11-18

MW12-18

MW13-18

MW14-18

MW15-18

MW16A-18MW16B-18

MW17A-18

MW17B-18

EMW303

MW09A-18MW09B-18

MW10B-18

MW10A-18

EMW402EMW202

AREA 2

AREA 1

AMW102


Apr 18, 2018

11155917-00

FIGURE 9


PROPOSED DEVELOPMENT CONCEPT - AERIAL PHOTOGRAPH

0 12.5 25 37.5m 1250.0002 0.8

Sources:· Microsoft Product Screen Shot(s) Reprinted with permission from Microsoft Corporation, Acquisition Date [unknown], Accessed: 2018· Preferred Development Concept November 17, 2017, Waterfront - Development section of City of Orillia website Accessed: 2018


BOREHOLE



ESTIMATED AREA OF SOIL IMPACT

GROUNDWATER CONCENTRATION ABOVEMOECC TABLE 2 AND TABLE 6 STANDARDS

GARAGE

TOWN HOUSE

LIVE WORK TOWN HOUSE

COTTAGE HOME GARAGE

COTTAGE HOME

G

TH

L/W

CG

C


Tables

Page 1 of 2

GHD 11155917RPT4-T1

Table 1

Evaluation of Remedial OptionsOrillia Waterfront Property

Centennial Drive, OrilliaCity of Orillia

Capital Cost

Annual Operating

Cost

Net Present Value

(10 Year)(1)

NPV with 20% Contingency

1 Risk Assessment (Entire Site) Through the RA process, both the soil and groundwater impacts on Site could be addressed with risk management measures (RMMs) and property specific standards (PSS) developed for the Site. The RA would be completed in accordance with the requirements of Ontario Regulation 153/04 and reviewed by the MOECC. One RA/RSC would be completed for the entire Site to support the redevelopment of the Site for residential land use. A Certificate of Property Use (CPU) outlining the RMMs and other requirements would be registered on title.

2-3 years 1 • Lowest capital cost• Shortest time frame to implement

• Requirement for a Tier 3 RA (longer MOECC review time)• Requirement for Risk Management Measures (RMMs) and Certificate of Property Use (CPU)• Likely RMMs would include basement restrictions, potentially a level of parking at grade or underground parking (if feasible), a vapour barrier, and/or a Subsurface Vapour Intrusion Mitigation System (SVIMS), among other RMMs• The RMMs would apply to the entire RA/RSC property• Long term monitoring and maintenance/inspection requirements related to RMMs and CPU requirements required• Future buildings would be restricted to condominium style and/or single family townhomes with property management oversight• Boundary control requirement along the upgradient Property boundary as source not fully known• Source of VOC impacts to groundwater is not fully known

• Further Investigative Activities/Source Investigation/Reporting on Site - $95,000• Completion of a Tier 3 RA (including hydrogeological modeling to demonstrate impacts would not affect drinking water quality at intake in Lake Couchiching) - $120,000• Allowance for Investigative Activities to address MOECC Comments - $60,000• Long-term monitoring and maintenance/inspection costs (10 years) $20,000/year• Costs for boundary control not included.

$275,000 $15,000 $470,000 $560,000

2 Excavation /Off-site Disposal of Soil and Risk Assessment (Entire Site)

Soil excavation and off-Site disposal activities would be undertaken to address the impacted soils present on Site. The clean-up standard would be the applicable MOECC generic standards. The soil excavation and off Site disposal activities could be undertaken as a stand alone or in conjunction with the Site preparation works associated with the development. An RA (described in Option 1 above) would be undertaken to address the groundwater impacts on the Site.

2-3 years 1 • Some RMMs associated with the impacted soil on Site (i.e., capping requirements, etc.) may not be required• Shorter time frame to implement

• High capital cost for soil excavation/off Site disposal. Costs could be reduced and/or minimized by completing the soil excavation activities in conjunction with Site preparation activities. • Requirement for a Tier 3 RA (longer MOECC review time)• Requirement for Risk Management Measures (RMMs) and Certificate of Property Use (CPU)• Likely RMMs would include basement restrictions, potentially a level of parking at grade or underground parking (if feasible), a vapour barrier, and/or a Subsurface Vapour Intrusion Mitigation System (SVIMS), among other RMMs• The RMMs would apply to the entire RA/RSC property• Long term monitoring and maintenance/inspection requirements related to RMMs and CPU requirements required• Future buildings would be restricted to condominium style and/or single family townhomes with property management oversight• Boundary control requirement along the upgradient Property boundary as source not fully known• Source of VOC impacts to groundwater is not fully known

• Further Investigative Activities/Source Investigation/Reporting on Site - $95,000• Excavation and off-Site disposal of approximately of 29,600 tonnes (38,500 tonnes with a 30% contingency) and $75/tonne for excavation/off Site disposal• Completion of a Tier 3 RA (including hydrogeological modeling to demonstrate impacts would not affect drinking water quality at intake in Lake Couchiching) - $110,000• Allowance for Investigative Activities to address MOECC Comments - $60,000• Long-term monitoring and maintenance/inspection costs (10 years) - $20,000/year• Costs for boundary control not included.

$3,152,500 $15,000 $3,340,000 $4,010,000

3 Focused Excavation/Off-site Disposal of Soil and Risk Assessment (Southern Portion of Site)

Soil remediation activities would be focussed on the northern portion of the Site. The impacted soils on the northern portion of the Site would be excavated and disposed of off Site at an approved MOECC facility. The clean-up standard would be the applicable MOECC generic standard. Based on the Phase Two ESA findings, groundwater impacts are not present on the northern portion of the Site. Undertaking focussed soil excavation activities on this portion of the Site would remove the requirement for RMMs. A separate RSC would be filed for the northern portion of the Site following the completion of the soil excavation activities. For the remaining portion of the Site (i.e., southern portion), the soil and groundwater impacts could be managed using the RA process outlined above in Option 1 and a separate RSC would be filed for the southern portion of the Site.

Northern portion of the Site - 1 year*Southern portion of the Site - 2 -3 years*

2 • RSC can be filed for north portion of property first permitting initial development of this portion of the property• Free-hold townhomes or single-family dwellings could be constructed on the northern portion of the Site without restriction• The requirement for property management oversight under a condominium corporation would not be required for the northern portion of the Site• Limits the restrictions for the proposed development to the southern portion of the Site

• High capital cost for soil excavation/off Site disposal. Costs could be reduced and/or minimized by completing the soil excavation activities in conjunction with Site preparation activities.• Timeline for RSC for the northern portion of the Site would be dependent on timing of soil excavation. RSC cannot be filed for the northern portion of the Site until remediation complete to the generic standards• Requirement for a Tier 3 RA for southern portion of the Site (longer MOECC review time)• RMM & CPU requirements would apply to the southern portion of the Site• Long term monitoring and maintenance/inspection requirements related to RMMs and CPU requirements• Future buildings on the southern portion of the Site would be restricted to condominium style and/or single family townhomes with property management oversight• Boundary control requirement along the upgradient Property boundary as source not fully known• Source of VOC impacts to groundwater is not fully known

• Further Investigative Activities/Source Investigation/Reporting on Site - $95,000• Excavation and off-Site disposal of approximately of 23,800 tonnes (31,000 tonnes with a 30% contingency) and $75/tonne for excavation/off Site disposal• Completion of a Tier 3 RA (including hydrogeological modeling to demonstrate impacts would not affect drinking water quality at intake in Lake Couchiching) - $110,000• Allowance for Investigative Activities to address MOECC Comments - $60,000• Long-term monitoring and maintenance/inspection costs (10 years) - $20,000/year• Costs for boundary control not included.

$2,590,000 $15,000 $2,780,000 $3,340,000

Anticipated Timeline Number of RSCs

Ballpark CostsOption

No. Assumptions in Developing CostsDisadvantagesAdvantagesDescription

Page 2 of 2

GHD 11155917RPT4-T1

Table 1

Evaluation of Remedial OptionsOrillia Waterfront Property

Centennial Drive, OrilliaCity of Orillia

Capital Cost

Annual Operating

Cost

Net Present Value

(10 Year)(1)

NPV with 20% Contingency

Anticipated Timeline Number of RSCs

Ballpark CostsOption

No. Assumptions in Developing CostsDisadvantagesAdvantagesDescription

4 Focused Excavation/Off-site Disposal of Soil and Focussed Groundwater Remediation and Risk Assessment (Southern Portion of Site)

Option 4 is the same as Option 3, with the exception that focussed groundwater remediation activities would be undertaken on the southern portion of the Site to reduce VOC concentrations in groundwater to levels that would allow the removal of some of the RMMs. Ex-situ remediation technologies such as mobile high vacuum dual phase extraction (HVDPE) could be used to reduce the soil vapour and groundwater concentrations on the southern portion of the Site.

Northern portion of the Site - 1 year*Southern portion of the Site - 3-4 years*

2 • Some RMMs associated with the impacted soil and reduced groundwater concentrations (i.e., capping requirements, etc.) may not be required • May reduce the RMMs/ building restrictions for the proposed development on the southern portion of the Site • RSC can be filed for north portion of property first permitting initial development of this portion of the property• Free-hold townhomes or single-family dwellings could be constructed on the northern portion of the Site without restriction• The requirement for property management oversight under a condominium corporation would not be required for the northern portion of the Site

• High capital cost for soil excavation/off Site disposal. Costs could be reduced and/or minimized by completing the soil excavation activities in conjunction with Site preparation activities• Timeline for RSC for the northern portion of the Site would be dependent on timing of soil excavation. RSC cannot be filed for the northern portion of the Site until remediation complete to the generic standards • Requirement for a Tier 3 RA for southern portion of the Site (longer MOECC review time)• RMM & CPU requirements would apply to the southern portion of the Site• Long term monitoring and maintenance/inspection requirements related to RMMs and CPU requirements• High capital costs for focussed groundwater treatment• Longer duration to complete - pilot studies, approvals for on-Site treatment, treatment period, and long-term monitoring to ensure there is no rebound in the concentrations • Source of VOC impacts to groundwater is not fully known - potential for groundwater remedial activities to mobilize VOCs from 70 Front Street onto the Site that may result in higher VOC concentrations • Boundary control required along upgradient property boundary

• Further Investigative Activities/Source Investigation/Reporting on Site - $95,000• Excavation and off-Site disposal of approximately of 23,800 tonnes (31,000 tonnes with a 30% contingency) and $75/tonne for excavation/off Site disposal• Focussed groundwater treatment, including pilot study, approvals, treatment, and monitoring on the southern portion of the Site - $1,000,000• Completion of a Tier 3 RA for the southern portion of the Site (including hydrogeological modeling to demonstrate impacts would not affect drinking water quality at intake in Lake Couchiching)• Allowance for Investigative Activities to address MOECC Comments - $60,000• Long-term monitoring and maintenance/inspection costs (10 years) - $15,000/year• Costs for boundary control not included

$3,590,000 $15,000 $3,730,000 $4,480,000

Notes:* If soil excavation and disposal costs are to be off Site by undertaking the soil excavation activities in conjunction with the Site preparation works, the timing would be dependent on the Site preparation works.(1) Calculation of Net Present Value = PV = PMT [(1 - (1 / (1 + i)n)) / i], where PV = Present Value; PMT = Amount of Annual Payment; i = interest rate (5 %); n = number of years (10 years).


Appendices


Appendix A Proposed Development Concept

Preferred Development Option

This scenario is based on a plan that would maximize short term revenue generation for the City.

Yield – 111 Units

Waterfront Towns: 50 units

Interior Towns: 8 units

Live Work Towns: 8 units

Cottage Homes: 17 units

Condo Mid Rise: 28 units


Appendix B Qualitative RA Approach Screening

Page 1 of 1

GHD 11155917-RPT4-Appendix B.1

Appendix B.1 Preliminary Qualitative Risk Assessment Screening – Soil

Orillia Waterfront Property Centennial Drive, Orillia

City of Orillia

COC

Concentrations Direct Contact, Human & Ecological: Hard/Fill Cap RMM in Place

Indoor Air Inhalation: Parking Garage RMM in Place

Leaching to Drinking Water: No RMM Possible in Tier 2

(DW Intake in Lake Couchiching, not on-Site)

Leaching to Off-Site Aquatic VECs: No RMM Possible in Tier 2

Maximum (µg/g)

Reasonable Estimate of Maximum

(REM; µg/g)

Resident (S1; µg/g)

Plants & Soil Organisms

(µg/g)

Mammals & Birds (µg/g)

Manageable under Tier 2?

Residential Indoor Air

(S-IA; µg/g)


Leaching to DW (S-GW1; µg/g)


Leaching to Aquatic VECs (S-GW3; µg/g)


Petroleum Hydrocarbons F3 470 564 260,000 1,700,000 No Value Yes No Value Yes 20000 Yes No Value Yes Boron (Hot Water Soluble)* 1.51 1.812 No Value 2000 No Value Yes No Value Yes No Value Yes No Value Yes Acenaphthene 8.03 9.636 3600 No Value 6,600,000 Yes 1600 Yes 21 Yes 560 Yes Anthracene 15.2 18.24 420,000 32,000 38,000,000 Yes No Value Yes 15000 Yes 0.67 No Benz[a]anthracene 28.8 34.56 36 1000 No Value Yes 13,000 Yes 190 Yes 5.1E+11 Yes

Benzo[a]pyrene 20.9 25.08 3.6

(3600 with HASP)

72,000 1,600,000 Yes (with HASP) 160,000 Yes 6.6 No 3.8E+13 Yes

Total Carcinogenic PAH as B[a]P 31.9 38.28 3.6

(3600 with HASP)

72,000 1,600,000 Yes (with HASP) 160,000 Yes 6.6 No 3.8E+13 Yes

Benzo[b]fluoranthene 26 31.2 36 No Value No Value Yes 1,100,000 Yes 67 Yes 7.7E+13 Yes Benzo[ghi]perylene 10.6 12.72 360 13,000 No Value Yes No Value Yes 2200 Yes 1.2E+13 Yes Benzo[k]fluoranthene 7.68 9.216 36 15,000 No Value Yes 1,300,000 Yes 66 Yes 2.5E+13 Yes Chrysene 22.8 27.36 360 14,000 No Value Yes 370,000 Yes 20 No 3.6E+11 Yes Dibenz[a h]anthracene 2.73 3.276 3.6 No Value No Value Yes 6,600,000 Yes 22 Yes 2.4E+13 Yes Fluoranthene 58.7 70.44 360 180,000 690 Yes 49,000 Yes 24 No 40000 Yes Indeno[1 2 3-cd]pyrene 10.9 13.08 36 760 No Value Yes 9,200,000 Yes 220 Yes 8.6E+13 Yes Methlynaphthalene, 2-(1-) *** 2.13 2.556 560 No Value No Value Yes No Value Yes 30 Yes 76 Yes Naphthalene 1.1 1.32 28,000 22,000 380,000 Yes 130 Yes 93 Yes 200 Yes Phenanthrene 47.9 57.48 420,000 12,000 2,700,000 Yes No Value Yes 17 No 270 Yes

GHD 11155917-RPT4-Appendix B.2

Appendix B.2 Preliminary Qualitative Risk Assessment Screening – Groundwater

Orillia Waterfront Property Centennial Drive, Orillia

City of Orillia

COC

Concentrations Drinking Water Residential Indoor Air Offsite Aquatic VECs

Maximum (µg/L)

Reasonable Estimate of Maximum

(REM; µg/L)

Generic GW1 (µg/L)

Manageable Under Tier 2?

Transport of GW1

Under Tier 3 (µg/L)


Generic Table 6 GW2-Res

(µg/L)

Maximum Site-Specific Table 6 GW2-Res

Under Tier 2 (µg/L)


Generic Table 6/8 GW3

(µg/L) Manageable

Under Tier 2?

Barium 1,290 1,548 1,000 No 12,625 Yes None (Not Volatile) None Yes

(Not Volatile) 23,000 Yes

Chloroform 0.77 0.92 25 Yes 316 Yes 10 2,100 Yes 12,000 Yes Dichloroethylene, 1,1- 2.5 3.0 14 Yes 177 Yes 0.5 14 Yes 12,000 Yes Dichloroethylene, 1,2-cis- 62.4 74.9 20 No 253 Yes 1.6 14 No 140,000 Yes

Tetrachloroethylene 50.3 60.4 20 No 253 Yes 0.5 14 No 8,400 Yes Toluene 26.2 31.4 24 Yes 303 Yes 320 63,000 Yes 14,000 Yes Trichloroethylene 122 146 5 No 63 Potentially 0.5 11 No 220,000 Yes Vinyl Chloride (current) 8.23 9.88 2 No 25 Yes 0.5 1.4 No 360,000 Yes Vinyl Chloride (est. future) 23.8 23.8 2 No 25 Yes 0.5 1.4 No 360,000 Yes

Documents

Remedial Action Plan - orillia.ca · plan showing surrounding land use is provided on Figure 2. A Site plan and detailed Site plan are provided on Figure 3.1 and Figure 3.2, respectively