N-6NSPI (NSEB) RIR 1 to 202 - Redacted
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Proponent's Understanding and Acceptance of the Following - i. The company shall comply with all applicable environmental legislation, regulations, standards, work practices, and provisions including, but not limited to, NSPI's Contractor...
AI summary The proponent agrees to comply with environmental regulations and standards, including NSPI's Contractor Environmental Requirements. They will ensure the disposal or destruction of all scrap treated wood at approved facilities and provide a Certificate of Disposal/Destruction to NSPI.
Environmental Regulatory Directives/Orders Dexter was issued a Regulatory Directive related to sedimentation into a stream related to heavy rainfall. See Appendix D for copy of the directive.
AI summary Dexter received a Regulatory Directive concerning sedimentation in a stream caused by heavy rainfall. The directive is referenced in Appendix D of the document.
13.0 Waste Management and Environmental Protection The Municipal Group of Companies (MGOC) has developed a comprehensive Environmental Management Plan to be used as a resource by construction operations to ensure that company activities ar...
AI summary The Municipal Group of Companies (MGOC) has created an Environmental Management Plan (EMP) and Environmental Operating Procedures (EOPs) to address environmental concerns in construction operations, covering waste management, erosion control, and spill response. These frameworks ensure compliance with legal requirements and environmental mitigation.
Response and Reporting - − In the event of a chemical spill, the Safety Data Sheet (SDS) must be consulted. Safe handling procedures, instructions in case of fire, health hazard ratings and summarized spill response procedures are listed o...
AI summary The document outlines chemical spill response procedures, including consulting Safety Data Sheets (SDS), containing spills, notifying supervisors, proper disposal in labeled drums, and incident reporting. Proactive measures to prevent spills are also emphasized.
13.3 Construction/Demolition Material and Debris - 1) Measures will be taken to prevent materials such as fresh concrete, cement, concrete debris, and construction debris from entering any watercourse. - 2) Construction material will be st...
AI summary The document outlines two measures to manage construction and demolition debris: preventing materials like concrete and debris from entering watercourses, and storing construction materials above flood water levels to mitigate environmental risks.
13.5 Work Adjacent to Waterways - 1) Do not operate construction equipment in waterways. - 2) Do not use waterway beds for borrow material. - 3) Do not dump excavated fill, waste material or debris in waterways. - 4) Design and construct t...
AI summary The document outlines seven safety and environmental guidelines for work near waterways, including restrictions on operating equipment, dumping materials, and blasting near spawning beds, alongside requirements for temporary crossings to prevent erosion.
Project Health & Safety Plan Tufts Cove Shoreline Sheet Pile Rock Revetment RFP-06/2025-545 emergency services) prior to attempting to fight any fire themselves. If the fire is too large to extinguish, Emergency Services 911 or other Emerg...
AI summary The Project Health & Safety Plan outlines protocols for emergency response, medical incidents, transportation to medical facilities, accident management, spill containment, and workplace violence prevention. It emphasizes immediate notification of emergency services, proper first aid administration, spill reporting to environmental authorities, and adherence to workplace violence policies.
Tufts Cove Shoreline Sheet Pile Rock Revetment RFP-06/2025-545 Contracto or Safety Management Program - Appen dix B – NSPI F Hazard Anal lysis Page 4 d , Boating Contractor Approval A Α Qualified Workers С Α SPI SWPs: NP 01 – Devision from...
AI summary The document outlines safety management programs and risk categories for a shoreline revetment project, including requirements for boating contractor approval, qualified workers, and various safety practices. It also identifies applicable and not applicable risk areas such as regulatory compliance, environmental impacts, and stakeholder engagement.
OVERVIEW OF INSPECTION On January 23, 2023, Environment and Climate Change (ECC)inspector Anthony Heggelin conducted an inspection at Stillwater Brook, Highway 103, near Queensland, NS. The site consists of many properties owned by the Pro...
AI summary An inspection by Environment and Climate Change (ECC) at Stillwater Brook found sediment discharge from properties managed by the Province of Nova Scotia and Municipal Enterprises Limited (MEL), with Dexter Construction as the responsible party. Sediment-laden water was observed in multiple ditches, and samples were collected. NSECC considers Dexter responsible for the site's environmental issues.
2026 ACE Plan NSEB IR-71 Attachment 1 Page 129 of 139 REDACTED (CONFIDENTIAL INFORMATION REMOVED) The small unnamed brook toward the north of the site (Municipal property) was sediment laden. This was viewed from the bridge at the quarry r...
AI summary Environmental concerns were observed at a site, including sediment-laden water from an aggregate storage pile draining into a nearby brook. Water samples showed elevated total suspended solids (TSS) levels, with background levels at 6 mg/l and silt-laden areas reaching 530–540 mg/l. Samples were refrigerated and later submitted to a lab for analysis.
COMPLIANCE ITEMS In order to ensure compliance with the Environment Act and Regulations, the following items must be addressed: Item # Environment Act 67(2) No person shall release or permit the release into the environment of a substance...
AI summary The document outlines compliance requirements under the Environment Act and Regulations, specifically Section 67(2), which prohibits unauthorized substance releases causing adverse effects. Compliance must be achieved by April 21, 2023, with guidance provided via an attached directive. The inspection report was prepared by Anthony Heggelin of the Nova Scotia Department of Environment and Climate Change.
Environment Act DIRECTIVE ISSUED TO: Dexter Construction Company Limited c/o Jamie Burns February 16, 2023 DATE ISSUED: MAILING ADDRESS: 927 ROCKY LAKE DRIVE, P.O. BOX 48100 HALIFAX, NS B4A 3Z2 SITE NAME: Stillwater Brook-The Puddle- Highw...
AI summary An Environment Act directive issued to Dexter Construction Company Limited mandates immediate measures to prevent sediment-laden water from entering Stillwater Brook and an adjacent brook. Non-compliance may result in enforcement actions, with compliance required by April 21, 2023, and ongoing until sediment issues are resolved.
2026 ACE Plan NSEB IR-71 Attachment 1 Page 131 of 139 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Supporting text where applicable: Prohibition s.67 - (1) No person shall knowingly release or permit the release into the environment of a su...
AI summary The text outlines provisions from the Environment Act 1994-95, c. 1, focusing on prohibitions against substance releases, remedial measures, inspector powers, and directives. Key themes include legal obligations for environmental compliance, enforcement mechanisms, and regulatory oversight.
COMPLIANCE ITEMS In order to ensure compliance with the Environment Act and Regulations, the following items must be addressed: Item # 14490076-001 Environment Act 122A(1) An inspector may issue a directive to a person requiring the person...
AI summary The text outlines compliance requirements under the Environment Act and Regulations, specifying that inspectors may issue directives, detain items, request documents, or require actions to ensure environmental compliance.
In order to comply with this section you must: Submit a schedule that includes a date of when each of the following issues/ solutions identified at the site will be rectified/ implemented. Most of the following should be rectified by Octob...
AI summary The text outlines compliance requirements to address environmental and infrastructure issues at a site, including immediate cessation of silt release into a watercourse, installation of a functional rain gauge, and stabilization of an access road by October 8, 2021, with justification required for delays.
2026 ACE Plan NSEB IR-71 Attachment 1 Page 133 of 139 REDACTED (CONFIDENTIAL INFORMATION REMOVED) and observation 1 in the September 19 visit) - 4) Access road to the northern pond needs better stabilization. (observation 5 of the Septembe...
AI summary The document outlines site stabilization requirements, including hydroseeding, rock lining, and silt boom inspections, to comply with environmental regulations. It references compliance with Environment Act 67(2) and includes directives for addressing exposed soil and drainage systems. Items 14490076-001, 14490076-002, and 14537598-004 are marked as complied with.
Environment Act DIRECTIVE ISSUED TO: Dexter Construction Company Limited c/o Jamie Burns October 7, 2021 DATE ISSUED: MAILING ADDRESS: 927 ROCKY LAKE DRIVE, P.O. BOX 48100 HALIFAX, NS B4A 3Z2 SITE NAME: Stillwater Brook-The Puddle- Highway...
AI summary Nova Scotia Environment issued a directive to Dexter Construction requiring compliance with environmental recommendations by October 31, 2021, based on an inspection report and emails from Kelly Hines and Jamie Burns. Non-compliance may result in enforcement actions.
2026 ACE Plan NSEB IR-71 Attachment 1 Page 136 of 139 REDACTED (CONFIDENTIAL INFORMATION REMOVED) \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \...
AI summary The text outlines legal provisions from Nova Scotia's Environment Act, including prohibitions on unauthorized substance releases, duties to remediate environmental harm, inspector powers for entry and document production, and mandatory compliance with directives. These provisions emphasize environmental protection and regulatory enforcement.
2026 ACE Plan NSEB IR-71 Attachment 2 Page 31 of 53 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Tufts Cove Shoreline Sheet Pile Rock Revetment #RFP-06/2025-545 8.10 ENVIRONMENT
AI summary The document outlines the 'Tufts Cove Shoreline Sheet Pile Rock Revetment' project under RFP-06/2025-545, with a dedicated 'ENVIRONMENT' section addressing environmental considerations for the 2026 ACE Plan. The text highlights the need for environmental analysis in the project's implementation.
ENVIRONMENTAL POLICY As a responsible company we will ensure that the proper safeguards are taken to protect our environment. All individuals will have responsibility and we will take the necessary action to protect the environment. Elliot...
AI summary Elliot Group of Companies outlines its environmental policy, emphasizing recycling, employee training, waste management compliance, spill kit availability, and incident reporting to protect the environment and adhere to provincial legislation.
Environmental Site Inspection Form ELLI EXCAVATO ENV /IRO NMENT AL CONTROLS CHECKLIST Date and Time: Weat her: Project Name: Project Su pervisor: NAME(PRI NT) SIGN ATURE POSITION DATE PREPARED BY: APPROVED BY: 10.11 The following Erosion a...
AI summary This Environmental Site Inspection Form outlines daily inspection requirements for erosion and sediment control measures, including silt fences, hay check dams, and discharge area management. It includes project details, supervisor information, and compliance verification sections.
D.COMPLIANCE Elliot Excavators Limited shall comply with all applicable environmental legislation, regulations, standards, work practices and provisions including but not limited to: - Environmental Act of Nova Scotia - Nova Scotia Power I...
AI summary Elliot Excavators Limited must comply with environmental legislation, including proper disposal of treated wood and providing a certificate to Nova Scotia Power Inc. (NSPI) confirming compliance with disposal requirements.
E. ENVIRONMETAL REGULATORY DIRECTIVES/OFFENCES/ORDERS Please also be advised that Elliot Excavators Limited has not been convicted of any regulatory offences from the Provincial Department of Environment.
AI summary The text states that Elliot Excavators Limited has no convictions for environmental regulatory offenses from the Provincial Department of Environment.
RTP Surge Residual (m) Surge Residual + HHWLT (m, CCGV2013) Total Water Level (surge + tide) (m CGVD2013) 1 0.80 1.53 1.11 5 1.00 1.73 1.28 10 1.10 1.83 1.36 25 1.23 1.96 1.46 50 1.32 2.05 1.53 100 1.42 2.15 1.61 200 1.52 2.25 1.69 Total W...
AI summary The table presents water level data for different return periods, including surge residual, surge residual plus high high water level (HHWLT), and total water level (surge + tide). These levels are measured in meters relative to the Canadian Geodetic Vertical Datum of 2013 (CGVD2013).
2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 criticality score reflects environmental sensitivity, station configuration, and potential 13 compromised, resulting in mineral oil impa...
AI summary The text discusses environmental concerns related to a transformer pad and oil containment system, including mineral oil impacts and repairs. NSP retained Strum Consulting to conduct an environmental site assessment, with ongoing work since August 2024.
- All relevant sections of this checklist must be completed and must accompany the Environmental Site Assessment for Limited Remediation Report. - The signature required on this checklist is from the managing site professional. - All regul...
AI summary This document outlines requirements for completing and submitting environmental checklists and site assessments, emphasizing the need for full compliance with regulatory protocols and separate filings for each property involved.
2a - L1 Environmental Site Assessment Requirements continued Supporting 11 Contamination has not extended to bedrock; 550 44 2.00 or enton o le so where contaminated soil has extended to bedrock on non-potable sites and no evidence of free...
AI summary The document discusses environmental site assessment requirements, focusing on contamination, groundwater assessments, and soil sampling procedures for volatile organic compounds. It outlines conditions under which groundwater assessments are not required and mentions the use of composite soil sampling procedures.
2a - L1 Environmental Site Assessment Requirements continued Supporting 3 di firm all the following information has been submitted to the Department. Indicate git report ID, section and page number where information is documented. It is no...
AI summary The text outlines requirements for an L1 Environmental Site Assessment (ESA), including submission of information to the Department, interpretation of findings, risk evaluation, and recommendations for contaminants found at a site. It also mentions excavation practices, soil sampling procedures, and QA/QC procedures.
Cor 3 d - L2 Environmental Site Assessment Requirements continued offirm all the following information has been submitted to the Department. Indicate igit report ID, section and page number where information is documented. It is not septab...
AI summary The text outlines requirements for submitting environmental site assessment information, specifically under PRO-200, and indicates that certain sections of the report have been completed or not completed, with references to specific report sections and pages.
Con 3 di - L2 Environmental Site Assessment Requirements continued firm all the following information has been submitted to the Department. Indicate git report ID, section and page number where information is documented. It is not Supporti...
AI summary The text outlines requirements for Environmental Site Assessments (ESAs) under the PRO-200 protocol, detailing submission of findings, conclusions, and supporting documentation for a Limited Phase 2 ESA. It includes sections on contaminants, risk assessments, and procedures for site investigations and sampling.
Env offessional must ensure all work has been completed in accordance with the PRO-200, vironmental Site Assessment for Limited Remediation Protocol. Yes Report Section Page Number
AI summary The text emphasizes the requirement for professionals to ensure that all work is completed in accordance with the PRO-200, which is the Environmental Site Assessment for Limited Remediation Protocol.
N-22Responses to Undertakings 1-22
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rmer substations located east and southeast of the power plant. The Phase II ESA was completed to investigate a release originating from the transformer substation immediately east of the power plant. Strum completed an initial site inspec...
AI summary A Phase II Environmental Site Assessment (ESA) was conducted to investigate a transformer oil release at a power plant site. Evidence of hydrocarbon staining and damaged containment structures was found, with a suspected slow leak leading to a significant oil loss. Soil samples showed elevated PHC levels, and temporary containment measures were deployed.
Background Civic Address 116 Ruth Falls Road, Sheet Harbour, NS PID(s) 00583732 Site Owner Nova Scotia Power Incorporated Current Land Use Industrial (active hydro-electric sub-station facility) Expected Future Land Use Industrial Adjacent...
AI summary The document outlines a site investigation conducted at an industrial hydro-electric sub-station facility in Sheet Harbour, NS, identifying contaminants such as PHCs and PCBs in soil and groundwater. The assessment found impacted areas to the north and east, with further investigation needed to the west and south. Ecological concerns were also noted due to elevated PHC levels and proximity to sensitive ecological receptors.
Recommendations - 1. A Phase III ESA should be completed at the site to further assess and delineate contamination in groundwater to the west (down-gradient) and south. The Phase III ESA should also include surface water and sediment sampl...
AI summary The recommendations include completing a Phase III ESA to assess contamination, remediation or risk-based management of contamination, continued monitoring of contamination migration, and decommissioning monitoring wells after regulatory closure. These actions aim to address environmental concerns at the site and ensure compliance with provincial regulations.
1.0 INTRODUCTION In August 2024, Strum was retained by Nova Scotia Power Incorporated (NSPI) to investigate a release originating from the transformer substation on the central portion of 116 Ruth Falls Road, Sheet Harbour, Nova Scotia. A...
AI summary In August 2024, Strum was retained by Nova Scotia Power Incorporated (NSPI) to investigate a PCB-containing transformer oil spill at a site in Sheet Harbour, Nova Scotia. The spill is suspected to have occurred over an extended period, with a larger release of approximately 300 litres suspected in the last few months. The report summarizes findings from a Phase II Environmental Site Assessment and provides recommendations for regulatory site closure.
Based on the details of the documented transformer loss, the Phase II ESA assessed the potential Contaminants of Concern (COCs) listed in Table 2.3, below: Table 2.3: Potential Contaminants of Concern Summary Media Potential COCs Soil PHCs...
AI summary The Phase II ESA evaluated potential Contaminants of Concern (COCs) based on documented transformer loss, identifying PHCs and PCBs in both soil and groundwater media.
2.4 Conceptual Site Model To select appropriate site criteria, a Conceptual Site Model (CSM) approach was used that addresses both human and ecological health along with assessing potential contaminant exposure pathways. A summary of the C...
AI summary A Conceptual Site Model (CSM) approach was used to select appropriate site criteria, addressing human and ecological health and assessing potential contaminant exposure pathways. A summary of the CSM details is provided in Table 2.4.
Conceptual Site Model Current Land Use Industrial Expected Future Land Use Industrial Adjoining Land Use Residential and agricultural (resource) Land Use for Data Comparison Industrial and Residential Predominant Soil Type Coarse-grained s...
AI summary The conceptual site model outlines the current and expected land use, soil types, water sources, and potential human and ecological risk pathways at an industrial site. The site is adjacent to residential and agricultural areas, and groundwater use is for potable purposes. Risk pathways include direct contact, soil leaching to groundwater, and groundwater discharge to surface water.
Based on the results of the CSM, the selected assessment criteria used to evaluate the sample analytical results are outlined in Table 2.5, below. Table 2.5: Assessment Criteria Summary Media Assessment Criteria • NS Tier I EQS for industr...
AI summary The document outlines the assessment criteria used to evaluate sample analytical results based on the CSM. Key criteria include NS Tier I EQS for industrial and residential land use and the Atlantic RBCA ESLs.
3.0 SCOPE AND OBJECTIVES The scope of work for the Phase II ESA consisted of the following: - Completion of an initial site inspection to document the manner of the transformer oil loss and to collect a representative surface soil source s...
AI summary The Phase II Environmental Site Assessment (ESA) aimed to evaluate subsurface environmental conditions at a site affected by a transformer hydrocarbon release. Activities included site inspections, soil and groundwater sampling, and laboratory analysis to determine contamination levels. The assessment followed Canadian and Nova Scotia environmental standards to provide recommendations for containment and regulatory site closure.
4.0 INVESTIGATION ACTIVITIES The Phase II ESA activities are described in the following sections. Additional details of the field investigation and sampling methodologies are provided in Appendix C. A photo log of the initial site inspecti...
AI summary The document outlines Phase II Environmental Site Assessment (ESA) activities, including field investigation and sampling methodologies detailed in Appendix C, with additional information provided in Appendices D and E, and results detailed in Section 5.
The borehole/monitoring well locations are shown on Drawing 2 (Appendix A). A summary of the borehole details is provided in Table 4.2, below. Table 4.2: Borehole/Monitoring Well Investigation Summary ID Total Depth (m)1 Depth to Groundwat...
AI summary The text provides a summary of borehole and monitoring well investigations, including details such as depth, evidence of contamination, and the number of soil samples analyzed for each location.
5.0 INVESTIGATION RESULTS The results of the Phase II ESA are summarized in the following sections. Further details are available in the attached Drawings (Appendix A), Photo Log (Appendix D), Borehole/Monitoring Well Logs (Appendix E), da...
AI summary The Phase II Environmental Site Assessment (ESA) results are summarized, with further details provided in various appendices including drawings, photo logs, borehole logs, data tables, and laboratory analysis certificates.
A summary of the subsurface soil/bedrock conditions, groundwater flow, and other relevant site conditions determined during the assessment is provided in Table 5.1, below. Table 5.1: Site Conditions Summary Conditions Details Soil Stratigr...
AI summary The text summarizes subsurface soil and bedrock conditions, groundwater flow, and contamination findings from an environmental assessment. Key details include soil stratigraphy, bedrock depth, groundwater levels, and the presence of a mineral oil sheen in one monitoring well.
5.2 Sample Analytical Results Following completion of the field sampling program, Strum submitted select samples to both Bureau Veritas Laboratories in Bedford, NS and ALS Environmental in Dartmouth, NS for analysis. Further details on how...
AI summary Strum submitted samples for analysis to Bureau Veritas Laboratories and ALS Environmental. The samples were analyzed against NS Tier I EQS for soil and groundwater. Exceedances of these criteria are summarized in Table 5.2, with further details provided in Appendix F and Drawings 4-5.
Media Contaminant Type No. of Samples Submitted for Lab Analysis Applicable Criteria Exceeded No. of Samples that Exceed Criteria Table Reference in Appendix F NS Tier I EQS (industrial) 1 PHC 9 NS Tier I EQS (residential) 1 1 Soil NS Tier...
AI summary The table presents data on contaminant samples submitted for lab analysis in soil and groundwater, indicating how many samples exceeded applicable environmental quality standards (EQS) in Nova Scotia. It includes details on PHC (Petroleum Hydrocarbons) and PCBs (Polychlorinated Biphenyls) in different media and tiers of EQS.
PHCs In summary, hydrocarbon contaminated soil in concentrations exceeding the applicable NS Tier I EQS was identified in one sample [S1(AU30)] collected from surface soil present within the fractures of exposed bedrock at the base of the...
AI summary Hydrocarbon-contaminated soil was found in one sample, exceeding Tier I EQS, and is inferred to be isolated to the area under the transformer infrastructure. Groundwater contamination was detected in one well, requiring further assessment. The depth of testing was limited due to infrastructure, so contamination may extend further.
PCBs All soil and groundwater samples were reported to contain PCB concentrations that comply with the Tier I EQS. The areas of identified soil and groundwater contamination are shown on Drawings 4-5 in Appendix A. Further discussion of th...
AI summary All soil and groundwater samples tested show PCB concentrations that meet Tier I EQS. Contaminated areas are depicted on Drawings 4-5 in Appendix A, with further details provided in Section 6.
5.4 Ecological Screening Assessment Strum has also completed an ecological screening of the site conditions and sample results to determine if there are any potential concerns to ecological receptors on or near the site. The ecological scr...
AI summary Strum conducted an ecological screening assessment comparing shallow soil and groundwater data to Ecological Screening Levels (ESLs) to identify potential concerns for ecological receptors. The results are summarized in Table 5.3, with further details in Appendix F and an Atlantic RBCA Ecological Screening Assessment in Appendix I.
Media Contaminant of Concern Ecological Screening Criteria No. of Samples that Exceed Criteria Table Reference in Appendix F Soil PHCs Atlantic RBCA Tier I PHC ESLs for Protection of Plants & Soil Invertebrates (Direct Soil Contact), and P...
AI summary The document presents a table showing that one soil sample collected at the site exceeded the applicable ecological screening levels (ESL) for PHCs, based on Atlantic RBCA Tier I criteria for protection of plants, soil invertebrates, wildlife, and livestock. Groundwater samples also showed PHC concentrations exceeding criteria, but no samples exceeded PCB criteria.
6.0 DISCUSSION Based on the results of the Phase II ESA, the following areas of contamination have been identified at the site: - Mineral oil staining has been observed on shallow soils and bedrock along the base of the retaining wall down...
AI summary The Phase II ESA identified mineral oil staining and elevated PHC concentrations in soil and groundwater at the site, with contamination extending to bedrock. Ecological receptors are nearby, and further assessment is required to delineate contamination and determine remediation or risk management strategies.
7.0 CONCLUSIONS & RECOMMENDATIONS As requested by NSP), Strum completed a Phase II ESA at the industrial 116 Ruth Falls Road site in Sheet Harbour, NS to investigate a transformer oil release originating from the electrical substation on t...
AI summary Strum conducted a Phase II ESA at the 116 Ruth Falls Road site in Sheet Harbour, NS, following a transformer oil release. Evidence of the release was observed by NSPI staff, and a soil sample showed elevated PHC levels. Absorbent pads were deployed to contain potential oil migration.
9.0 REFERENCES Atlantic Risk Based Corrective Action (RBCA), July 2022 Revision. User Guidance for Petroleum Impacted Sites in Atlantic Canada, Version 4. Atlantic RBCA, December 2016 with April 2019 update. Guidance for Vapour Intrusion A...
AI summary The document lists various environmental and geological references, including environmental assessments, regulations, and geological maps related to sites in Nova Scotia, particularly focusing on the Dartmouth Shopping Centre and surrounding areas.
Website References Atlantic RBCA Tier I EQS & Tier II PSS Tables https://atlanticrbca.com/wpcontent/files_mf/1627923620Atlantic_RBCA_EQS_and_PSS_Tables_July_2021.pdf?6225992 62 Nova Scotia Department of Natural Resources (NSDNR) Mineral Re...
AI summary The text provides a list of website references related to environmental regulations, mineral resources, and water management in Nova Scotia. These links include information on regulatory standards, disposal agreements, and mapping tools.
APPENDIX B SITE ASSESSMENT & TIER I/II TABLE CHECKLIST
AI summary This document outlines an appendix containing a site assessment and Tier I/II table checklist, which is likely used for environmental or regulatory compliance purposes in Nova Scotia.
SITE ASSESSMENT & TIER I/II TABLE CHECKLIST Method Used
AI summary The document outlines a checklist for conducting site assessments and Tier I/II table evaluations, focusing on environmental and safety compliance. It includes methods for assessing potential contaminants and ensuring adherence to regulatory standards.
Free Product Monitoring The monitoring wells were also inspected for any evidence of free-phase petroleum or chemical product (i.e., "free product") using an electronic oil/water interface probe. Free product in groundwater is defined as a...
AI summary The text describes the process of inspecting monitoring wells for free-phase petroleum or chemical products using an electronic oil/water interface probe. Free product is defined as a visible layer of petroleum/chemical product in groundwater greater than 1 mm thick. The method varies depending on whether the contaminants are less dense or denser than water.
Soil Sample Collection and Screening Representative soil samples were collected at continuous intervals (where possible) at all test locations by a Strum field representative. All soil samples were collected and sealed in glass containers...
AI summary Soil samples were collected and analyzed for VOCs using specific methods and equipment. The samples were submitted to accredited laboratories for further analysis, ensuring compliance with quality standards.
Groundwater Sample Collection Prior to collection of groundwater samples, each well was purged of at least three well volumes (or to dryness) using a decontaminated submersible pump in order to remove any standing water from the well, and...
AI summary Groundwater samples were collected by purging wells and using dedicated bailers. Sampling methods varied depending on the density of contaminants. Samples were stored in appropriate glassware and submitted to ALS Environmental for analysis. Metals samples were filtered in the field.
APPENDIX D PHOTOGRAPH LOG Photo 1: View of gravel driveway entry to the site and hydro-power plant building, looking north. Photo taken on September 5, 2024. Photo 2: View of hydro-power plant and transformer substation on north side of th...
AI summary Appendix D contains a photograph log of a site inspection, including images of the gravel driveway, hydro-power plant, transformer substations, and environmental assessments such as test pits and boreholes conducted in September 2024.
APPENDIX E BOREHOLE LOGS BH/MW1 $\nabla A \nabla$ PROJECT: Phase II ESA - 116 Ruth Falls Rd., Sheet Harbour, NS DRILLING DATE: September 18, 2024 DRILLER: Q-Drilling DRILL TYPE: CME-45 ELEVATION DATUM: Assumed DRILLING METHOD: Auger & Case...
AI summary This document contains borehole logs from the Phase II Environmental Site Assessment (ESA) at 116 Ruth Falls Rd., Sheet Harbour, NS, drilled on September 18, 2024 by Q-Drilling using the CME-45 drill type. The logs include details about the drilling method and project context.
BH/MW3 $\nabla A \nabla$ PROJECT: Phase II ESA - 116 Ruth Falls Rd., Sheet Harbour, NS DRILLING DATE: September 18, 2024 DRILLER: Q-Drilling DRILL TYPE: CME-45
AI summary The text provides details about a Phase II Environmental Site Assessment (ESA) project conducted at 116 Ruth Falls Rd., Sheet Harbour, NS on September 18, 2024, by Q-Drilling using a CME-45 drill type.
2026 ACE Plan U-10 Attachment 2 Page 51 of 153 Table 1A: Tier I Soil Ecological Screening for the Protection of Plants and Soil Invertebrates; Direct Soil Contact and the Protection of Wildlife and Livestock; Soil Ingestion, 116 Ruth Falls...
AI summary The text references a soil ecological screening table for the 116 Ruth Falls Road, Sheet Harbour, NS project, focusing on the protection of plants, soil invertebrates, wildlife, and livestock through direct soil contact and ingestion.
Dat De VO C Be To lue Eth len Hyd arb roc on Ran ges Did Sa le R h mp eac Sam ple ID e pth nze ne ne ylb enz ene Xy e C6- C10 (F1 ) C10 -C1 6 (F 2) C16 -C3 4 (F 3) C34 -C5 0 (F 4) Bas elin t C 32 e a (yy/ /dd ) mm (m) (pp m) (mg /kg ) (mg...
AI summary The document presents a table with data related to environmental sampling and analysis, including sample IDs, dates, depths, and concentrations of various hydrocarbons. It includes information on test pit soil samples, borehole soil samples, and environmental screening levels (ESLs) from the Atlantic Risk-Based Corrective Action (RBCA) guidelines. The data indicates whether certain thresholds are exceeded.
All screening levels are for surface soils (i.e. shallower than 1.5 m depth). CCME fractions (F1 to F4) vary from the RBCA fractions (Gas, Diesel/#2, and #6 Oil/Lube); however, direct comparison acceptable for screening purposes. Hydrocarb...
AI summary The document discusses the comparison of hydrocarbon screening levels between the RBCA and CCME fraction formats, noting that while the fractions differ, they can be combined and compared for screening purposes. Specific equivalencies between RBCA and CCME fractions are provided for comparison.
Analysis of fraction C32-C50 is not part of standard RBCA lab analysis package. VO C = Vo latil e O ic C ds i mpl e he ads rgan omp oun n sa pac e tres bel grad m = me ow e nd = not det ecte d mg/ kg = mil ligra kilog ms per ram arts mil l...
AI summary The analysis of hydrocarbon fraction C32-C50 is not included in the standard RBCA lab analysis package. The table provides data on volatile organic compounds (VOCs) and detection limits, with some values not detected or incomplete.
TABLE 2: Soil Analytical Results - Polychlorinated Biphenyls - 116 Ruth Falls Rd., Sheet Harbour, NS Project #24-10728 Crit eria Sam ple ID S1( AU 30) TP1 -S1 TP2 -S1 TP3 -S1 TP4 -S1 BH 1-S 1 BH 2-S 1 BH 3-S 1 BH 4-S 1 Par ter ame Uni ts R...
AI summary This table presents soil analytical results for polychlorinated biphenyls (PCBs) at 116 Ruth Falls Rd., Sheet Harbour, NS, Project #24-10728. The data includes sample IDs, detection limits, and PCB concentrations, with some samples showing detectable levels of specific PCB congeners and calculated total PCBs.
Underlining/bold indicates exceedance of: NS Tier I EQS - Residential, Potable, Coarse-grained (Oct. 2022) m = metres below grade mbfl = metres below floor mbf = metres below footing nd = non-detect nd( ) = non-detect at elevated detection...
AI summary The text presents environmental sampling data, including exceedances of NS Tier I EQS for residential and industrial groundwater, with specific metrics and acronyms related to environmental quality standards and risk-based corrective actions.
2026 ACE Plan U-10 Attachment 2 Page 54 of 153 Table 3A: Tier I Groundwater Ecological Screening for the Protection of Plants and Soil Invertebrates (Direct Contact with Shallow Groundwater), 116 Ruth Falls Road, Sheet Harbour, NS
AI summary This table outlines Tier I Groundwater Ecological Screening for the protection of plants and soil invertebrates at 116 Ruth Falls Road, Sheet Harbour, NS, focusing on direct contact with shallow groundwater.
Project # 24-10728 Date Benzene Toluene Ethylbenzene Xylenes Hydrocarbon Ranges Sample ID Date Sample Type Delizelle Toluelle Ettiyibelizerie Aylelles F1 (C 6 -C 10 ) F2 (C 10 -C 16 ) (yy/mm/dd) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) Gr...
AI summary The document presents groundwater sample data from Project #24-10728, showing concentrations of various hydrocarbons and benzene, toluene, ethylbenzene, and xylenes in groundwater samples (MW1 to MW4) collected on 24/09/23. The data is compared to the Atlantic RBCA ESLs for industrial and residential criteria, with some values indicated as exceeding these standards.
Fractions F1 and F2 vary slightly from the RBCA fractions of Gas, Diesel/#2, and #6 Oil/Lube; however, direct comparison acceptable for screening purposes. Hydrocarbon concentrations in RBCA fraction format can be combined to be reported a...
AI summary The text discusses hydrocarbon concentration reporting standards, noting that RBCA fractions can be combined to match CCME fractions for screening purposes. It also specifies that these screening levels are applicable only if groundwater is within 3 meters of the ground surface.
There is no screening level for F3 and F4 as these fractions are considered insufficiently soluble to migrate to groundwater from soil. mg/L = milligrams per litre nd = not detected nd ( ) = not detected at elevated detection limit n/c = a...
AI summary The text states there is no screening level for F3 and F4 fractions due to their low solubility, which prevents migration to groundwater from soil. A table provides definitions for various analytical terms and units, and a lab analysis was conducted by Bureau Veritas.
2026 ACE Plan U-10 Attachment 2 Page 55 of 153 Table 3B: Tier I Surface Water and Groundwater Ecological Screening for the Protection of Freshwater and Marine Aquatic Life, 116 Ruth Falls Road, Sheet Harbour, NS
AI summary This document presents Table 3B from the 2026 ACE Plan U-10 Attachment 2, which outlines Tier I Surface Water and Groundwater Ecological Screening for the protection of freshwater and marine aquatic life at 116 Ruth Falls Road, Sheet Harbour, NS.
Groundwater screening levels can be used for evaluating groundwater quality at locations greater than 10 meters from a freshwater or marine water body. It is recommended that surface water screening levels should be applied directly (or un...
AI summary The text discusses the application of groundwater and surface water screening levels for evaluating groundwater quality, depending on proximity to water bodies. Groundwater screening levels are used for locations more than 10 meters from a water body, while surface water screening levels are recommended for locations within 10 meters.
The screening level for mTPH (lube oil) set to RDL, actual dervied screening level = 0.06 mg/L mTPH = Modified Total Petroleum Hydrocarbons mg/L = milligrams per litre nd = not detected n/c = analysis not completed - indicates no establish...
AI summary The screening level for modified total petroleum hydrocarbons (mTPH) from lube oil is set to the reportable detection limit (RDL), with an actual derived screening level of 0.06 mg/L. Lab analysis was conducted by Bureau Veritas in Bedford, Nova Scotia.
TABLE 4: Groundwater Analytical Results - Polychlorinated Biphenyls - 116 Ruth Falls Road, Sheet Harbour, NS Project #24-10728 Cri ter ia Sa le I D mp MW 1 MW 2 MW 3 MW 4 Pa ete ram r Un its RD L NS Ti I E QS - I nd ust ria l, P ota ble er...
AI summary Table 4 presents groundwater analytical results for polychlorinated biphenyls (PCBs) at 116 Ruth Falls Road, Sheet Harbour, NS, Project #24-10728. The results show non-detect levels (nd) for all tested PCB congeners at monitoring wells MW1 to MW4, with calculated total PCB levels below the reporting detection limit (RDL).
Underlining/bold indicates exceedance of: NS Tier I EQS - Residential, Potable, Coarse-grained (Oct. 2022) Shading/bold indicates exceedance of: NS Tier I EQS - Industrial, Potable, Coarse-grained (Oct. 2022) GW = groundwater DW = drinking...
AI summary The document presents groundwater and drinking water sample results, indicating exceedances of environmental quality standards (EQS) in Nova Scotia. It includes definitions of terms such as non-detect, reportable detection limit, and risk-based corrective action. Samples were analyzed by Bureau Veritas.
ATLANTIC RBCA HYDROCARBONS (SOIL) Bureau Veritas ID ABTK93 ABTK93 Sampling Date 2024/08/30 2024/08/30 COC Number N/A N/A UNITS S1(AU30) RDL QC Batch S1(AU30) Lab-Dup RDL QC Batch Petroleum Hydrocarbons Benzene mg/kg ND 0.0050 9630429 ND 0....
AI summary The document presents soil sampling results for petroleum hydrocarbons at a site identified as ABTK93, with sampling conducted on August 30, 2024. The data includes measurements for various hydrocarbon compounds, detection limits, and laboratory batch numbers. The results show non-detect levels for several compounds, while others exceed the reportable detection limits.
General Comments The analytical methods used by ALS are developed using internationally recognized reference methods (where available), such as those published by US EPA, APHA Standard Methods, ASTM, ISO, Environment Canada, BC MOE, and On...
AI summary The text discusses the analytical methods used by ALS Environmental, referencing internationally recognized standards and noting factors that may affect reported results, such as dilution, sample quantity, and matrix interference. It also directs readers to the Quality Control Interpretive report for further details.
Analytical Results Sub-Matrix: Soil/Solid Client sample ID TP1-S1 TP2-S1 TP3-S1 TP4-S1 (Matrix: Soil/Solid) Client sampling date / time 09-Sep-2024 09:15 09-Sep-2024 09:30 09-Sep-2024 09:45 09-Sep-2024 10:00 Analyte Method/Lab CAS Number L...
AI summary The analytical results from soil sampling conducted on September 9, 2024, show varying levels of moisture and hydrocarbons across multiple test pits. The results indicate the presence of petroleum hydrocarbons in different fractions, with higher concentrations in certain samples, but all values remain below the detection limits for some compounds.
POLYCHLORINATED BIPHENYLS BY GC-ECD (SOIL) Bureau Veritas ID ABTK93 Sampling Date 2024/08/30 COC Number N/A UNITS S1(AU30) RDL QC Batch PCBs Aroclor 1016 ug/g ND 0.10 9629025 Aroclor 1221 ug/g ND 0.10 9629025 Aroclor 1232 ug/g ND 0.10 9629...
AI summary The document presents analytical results for polychlorinated biphenyls (PCBs) in soil samples, with most Aroclor congeners detected at non-detect levels, except Aroclor 1254, which was detected at 0.47 ug/g. The total PCB concentration is 0.47 ug/g, and surrogate recovery for decachlorobiphenyl is 117%.
CERTIFICATE OF ANALYSIS Work Order : HA2402307 Page : 1 of 4 Halifax NS Canada B3J 2W5 Client : Nova Scotia Power Incorporated Laboratory : ALS Environmental - Halifax Contact : Mauricio Lopez Account Manager : Abby van der Jagt Address :...
AI summary This Certificate of Analysis from ALS Environmental details the results of environmental testing conducted for Nova Scotia Power Incorporated. The report includes general comments, analytical results, and surrogate control limits, with additional information provided in attached quality control and interpretive reports.
Analytical Results Sub-Matrix: Water C lient sample ID MW1 MW2 MW3 MW4 (Matrix: Water) Client samp oling date / time 23-Sep-2024 10:05 23-Sep-2024 10:35 23-Sep-2024 10:45 23-Sep-2024 11:30 Analyte CAS Number Method/L .ab LOR Unit HA2402307...
AI summary The analytical results present hydrocarbon and volatile organic compound concentrations from multiple monitoring wells sampled on September 23, 2024. The data includes levels of various hydrocarbon fractions, benzene, toluene, and other compounds, with some samples showing elevated levels of certain hydrocarbons, such as >C16-C21 fraction of mTPH and EPH >C16-C21.
APPENDIX H GROUNDWATER STATIC MEASUREMENTS
AI summary Appendix H presents groundwater static measurements, including chemical concentrations and environmental assessments conducted in Nova Scotia. It includes data on contaminants such as petroleum hydrocarbons and polychlorinated biphenyls, along with relevant environmental standards and testing procedures.
APPENDIX I ATLANTIC RBCA ECOLOGICAL SCREENING ASSESSMENT
AI summary This document presents an ecological screening assessment under the Risk Based Corrective Action (RBCA) framework for Atlantic sites. It outlines environmental criteria, screening levels, and methods for assessing contamination levels, including petroleum hydrocarbons and other pollutants.
6800$5<7$%/( 5(68/762)(&2/2\ ,&$/6&5((1,1\ 35272&2/)253(752/(80,03$&7('6,7(6 Instructions to Practitioners: This table is intended to summarize the results of the Ecological Screening Protocol and must be completed in consultation with gui...
AI summary This table is part of an environmental assessment process and is used to summarize the results of the Ecological Screening Protocol. It must be completed in consultation with the guidance provided in the protocol and included in an Environmental Assessment or Closure Report.
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AI summary The document appears to be a regulatory proceeding related to environmental and energy matters in Nova Scotia, involving groundwater and drinking water data, environmental standards, and corrective actions for contaminated sites. It references various environmental criteria and monitoring activities.
Background Civic Address 116 Ruth Falls Road, Sheet Harbour, NS PID(s) 00583732 Site Owner Nova Scotia Power Incorporated Current Land Use Industrial (active hydro-electric sub-station facility) Expected Future Land Use Industrial Adjacent...
AI summary This background section provides details about a site investigation conducted at 116 Ruth Falls Road, Sheet Harbour, NS, owned by Nova Scotia Power Incorporated. The investigation focused on assessing contaminants such as petroleum hydrocarbons and PCBs in soil, groundwater, and surface water, with fieldwork conducted in October 2024 and December 2024.
Nova Scotia Power Inc. Project # 24-10728 Results Summary Contaminants Identified PHC impacts in soil and groundwater identified during previous assessment work at the base of the down-gradient retaining wall west of the transformer. Delin...
AI summary The project identifies PHC impacts in soil and groundwater at the base of a retaining wall near a transformer. The contaminated areas have been fully delineated, and further assessment is not warranted. An ecological screening assessment identified potential concerns but no further action is needed at this time.
- Long-term groundwater monitoring (LTM) should be completed at the site to assess the stability of the inferred area of contamination and to confirm acceptable PHC groundwater concentrations over seasonal fluctuations. - 2. It is anticipa...
AI summary The document outlines recommendations for long-term groundwater monitoring, risk-based management of contamination, and the development of a Risk Management Plan to address remaining contamination at a site. It also mentions the need for routine monitoring and eventual regulatory closure submission to NS Environment & Climate Change.
1.0 INTRODUCTION Strum was retained by Nova Scotia Power Incorporated (NSPI) to complete a Phase III Environmental Site Assessment (ESA) at the industrial power plant located at 116 Ruth Falls Road, Sheet Harbour, Nova Scotia. Strum recent...
AI summary Strum was retained by Nova Scotia Power Incorporated (NSPI) to complete a Phase III Environmental Site Assessment (ESA) at an industrial power plant in Sheet Harbour, Nova Scotia. The assessment aims to delineate PHC contamination from a transformer oil release and evaluate potential impacts on the East River, with the goal of providing recommendations for regulatory site closure.
2.3 Previous Assessments As requested by NSPI, Strum completed initial site inspection and Phase II ESA activities in the fall of 2024 to document site conditions and to assess potential impacts following a transformer oil release that occ...
AI summary Strum conducted initial site inspection and Phase II ESA activities in the fall of 2024 at the request of NSPI to assess site conditions and potential impacts from a transformer oil release in August 2024, originating from a transformer substation near a hydroelectric power plant.
2.5 Conceptual Site Model To select appropriate site criteria, a Conceptual Site Model (CSM) approach was used that addresses both human and ecological health along with assessing potential contaminant exposure pathways. A summary of the C...
AI summary A Conceptual Site Model (CSM) approach was used to select appropriate site criteria, addressing human and ecological health and assessing potential contaminant exposure pathways. A summary of the CSM details is provided in Table 2.4.
Table 2.4: Conceptual Site Model Summary Conceptual Site Model Current Land Use Industrial Expected Future Land Use Industrial Adjoining Land Use Residential, commercial and agricultural (resource) Land Use for Data Comparison Industrial a...
AI summary Table 2.4 provides a summary of the Conceptual Site Model, outlining current and future land use, adjoining land use, soil type, water sources, and potential human and ecological risk pathways associated with the site.
Table 2.5: Assessment Criteria Summary Media Assessment Criteria NS Tier I EQS for industrial and agricultural land use, potable groundwater Soil & Groundwater usage and coarse-grained soils (October 2022). Atlantic RBCA ESLs (July 2022) S...
AI summary Table 2.5 summarizes assessment criteria for different media, including soil, groundwater, and surface water, referencing specific environmental standards and guidelines applicable in Nova Scotia and the Atlantic region.
3.0 SCOPE AND OBJECTIVES The scope of work for the Phase III ESA consisted of the following: - Drilling of two boreholes at select locations on the site to inspect subsurface conditions and to collect representative soil samples. - Followi...
AI summary The Phase III Environmental Site Assessment (ESA) involved drilling boreholes, installing groundwater monitoring wells, collecting sediment and surface water samples, and analyzing samples to assess PHC contamination. The objective was to determine the extent of contamination and provide recommendations for further action or regulatory closure in accordance with Nova Scotia standards.
4.2 Initial Site Assessment As previously mentioned, NSPI and Strum completed initial site assessment activities in the fall 2024 to assess site conditions following a 300-litre transformer oil release on August 24, 2024, from the substati...
AI summary An initial site assessment was conducted following a transformer oil release in August 2024. Soil samples showed elevated PHC levels, exceeding agricultural site standards. An intrusive investigation (Phase II ESA) is recommended to assess potential soil and groundwater impacts.
Table 4.2: Borehole/Monitoring Well Investigation Summary ID Total Depth (m) 1 Depth to Groundwater (mbTOC)² Evidence of Potential Contamination Notes No. of Soil Samples Analyzed Phase I ESA Boreholes/M onitoring wells BH/MW1 4.5 1.12 No...
AI summary Table 4.2 summarizes the results of borehole and monitoring well investigations, including total depth, depth to groundwater, evidence of contamination, and the number of soil samples analyzed. One borehole (BH/MW2) showed visual evidence of contamination in groundwater.
4.6 Surface Water Sampling One surface water sample [SW1(DE17)] was collected from East River by a Strum field technician using hand-held equipment and collected directly into designated sampling supplies on December 17, 2024. The surface...
AI summary A single surface water sample was collected from East River on December 17, 2024, due to safety and accessibility restrictions. Sediment sampling for PHC analysis was also not completed for the same reasons. The sample was submitted to ALS for analysis.
Table 5.1: Site Conditions Summary Conditions Details Soil Stratigraphy Medium brown silty sand with some gravel and slate cobbles, overlying bedrock. Sand and gravel fill on developed portions of the site. Bedrock Type & Depth Halifax For...
AI summary Table 5.1 summarizes site conditions, including soil stratigraphy, bedrock type, groundwater depths, and contamination evidence. The site has no soil contamination but shows a mineral oil sheen in two groundwater monitoring wells.
5.2 Sample Analytical Results Following completion of the field sampling program, Strum submitted select samples to ALS Environmental in Dartmouth, NS for analysis of parameters listed in Table 2.3 in Section 2.4. Further details on how sa...
AI summary Strum submitted samples for analysis after field sampling, with results compared to NS Tier I EQS for soil, groundwater, and surface water. Exceedances of applicable criteria were reported in PHC and PCB analysis from initial site inspections and Phase II/III ESAs, with details in Appendix F and highlighted on Drawings 4–5.
Table 5.2: Sample Analyses & Exceedances Summary Media Contaminant Type Submitted for Lab Analysis No. of Samples Applicable Criteria Exceeded No. of Samples that Exceed Criteria Table Reference in Appendix F 0.11 DUG 40 NS Tier I EQS (ind...
AI summary Table 5.2 summarizes sample analyses and exceedances of environmental quality standards (EQS) across various media, including soil, groundwater, and surface water. The table indicates the number of samples tested, applicable criteria, and whether criteria were exceeded, referencing specific appendices for further details.
5.2.1 Hydrocarbon Analytical Results
AI summary This section presents hydrocarbon analytical results, including measurements of various contaminants such as petroleum hydrocarbons, polychlorinated biphenyls, and benzene, toluene, ethylbenzene, and xylenes. These results are used to assess environmental conditions and guide remediation efforts.
Soil In summary, PHC soil concentrations exceeding the applicable NS Tier I EQS criteria (industrial and agricultural) were identified in one sample [S1(AU30)] collected directly from the visibly impacted soils within the fractures of expo...
AI summary A sample collected from the site showed PHC soil concentrations exceeding NS Tier I EQS criteria. The highest mTPH concentration was 130,000 mg/kg, exceeding both industrial and agricultural guidelines. Contaminated soils are inferred to be isolated to the transformer area, though deeper assessment may be needed due to infrastructure limitations.
Groundwater Nova Scotia Power Incorporated PHC contaminated groundwater in concentrations exceeding the applicable NS Tier I EQS criteria (industrial and agricultural) was previously identified in MW2 during the first round of groundwater...
AI summary Nova Scotia Power Incorporated identified PHC contaminated groundwater in MW2 during initial sampling in September 2024, but subsequent monitoring in October and December 2024 showed compliance with NS Tier I EQS criteria, indicating no ongoing PHC impacts in MW2.
Surface Water The surface water sample collected from East River west (downgradient) of the transformer reported PHC concentrations that complied with the applicable NS Tier I EQS criteria. It should be noted that sampling was limited to o...
AI summary A surface water sample from East River west of the transformer showed PHC concentrations within NS Tier I EQS criteria. Due to safety and accessibility, only one sample was taken, and sediment sampling was not completed. No further assessment is deemed necessary due to lack of evidence of riverbank impact.
Hydrocarbon Analytical Results Discussion Based on the combined results of the ESAs, PHC impacted soil has been fully delineated and inferred to be isolated to soils underlying the footprint of the transformer pad, extending to the edge of...
AI summary The document discusses the delineation of PHC-impacted soil and groundwater at the site, inferred to be under the transformer pad and retaining wall. Although recent groundwater sampling did not detect PHCs, contamination is conservatively assumed to exist in the same area as the soil plume, based on suspected hydrocarbon migration from a transformer oil release.
5.2.2 Polychlorinated Biphenyls Analytical (PCB) Results All soil and groundwater samples collected at the site reported non-detectable concentrations of PCBs or otherwise in concentrations that comply with the applicable NS Tier I EQS cri...
AI summary All soil and groundwater samples collected at the site showed non-detectable or compliant concentrations of PCBs with NS Tier I EQS criteria, making further PCB assessment unnecessary.
Table 5.3: Ecological Screening Level Exceedances Summary Media Contaminant of Concern Ecological Screening Criteria No. of Samples that Exceed Criteria Table Reference in Appendix F Soil PHCs Atlantic RBCA Tier I PHC ESLs for Protection o...
AI summary Table 5.3 summarizes ecological screening level exceedances for PHCs and PCBs in various media at a site. Six soil samples exceeded the applicable ESL criteria, with three samples collected during initial site inspections by NSPI and Strum. Exceedances were found in fill material around transformer containment pads and in soils with mineral oil staining.
6.0 DISCUSSION Nova Scotia Power Incorporated Based on the results of the Phase III ESA, the following areas of contamination have been identified at the site: - Mineral oil staining and elevated PHC concentrations exceeding the applicable...
AI summary The Phase III ESA identified contamination at the site, including mineral oil staining and elevated PHC concentrations in soils and bedrock. The contamination is primarily located beneath the transformer infrastructure, with some areas exceeding Tier I EQS for industrial and agricultural land use. The adjoining property is designated for commercial use, so concentrations there do not exceed commercial Tier I EQS.
CONCLUSIONS & RECOMMENDATIONS 7.0 As requested by NSPI, Strum completed a Phase III ESA at the industrial 116 Ruth Falls Road site in Sheet Harbour, NS. The Phase III ESA was completed to further assess and to Nova Scotia Power Incorporate...
AI summary NSPI requested a Phase III Environmental Site Assessment (ESA) at the 116 Ruth Falls Road site in Sheet Harbour, NS, to assess PHC impacts from a transformer oil release. Soil and groundwater samples were collected and analyzed for PHCs and PCBs, with findings related to site geology and groundwater levels.
9.0 REFERENCES Atlantic Risk Based Corrective Action (RBCA), July 2022 Revision. User Guidance for Petroleum Impacted Sites in Atlantic Canada, Version 4. Atlantic RBCA, December 2016 with April 2019 update. Guidance for Vapour Intrusion A...
AI summary This section lists references and guidelines related to environmental site assessments and corrective actions in Nova Scotia, including standards, regulations, and mapping resources used for assessing and managing contaminated sites.
Free Product Monitoring The monitoring wells were also inspected for any evidence of free-phase petroleum or chemical product (i.e., "free product") using an electronic oil/water interface probe. Free product in groundwater is defined as a...
AI summary The text describes the process of inspecting monitoring wells for free-phase petroleum or chemical products using an electronic oil/water interface probe. Free product is defined as a visible layer of petroleum/chemical product in groundwater greater than 1 mm thick. The method varies depending on whether the contaminants are less dense or denser than water.
Determination of Groundwater Flow Conditions The groundwater flow direction was estimated at the site based on a triangulation of groundwater level elevations recorded in the monitoring wells following completion of the drilling program. T...
AI summary The document details the process used to determine groundwater flow conditions at a site, including the use of monitoring wells, elevation contours, and hydraulic gradient calculations. A drawdown test was conducted to estimate hydraulic conductivity using the Hvorslev method.
Soil Sample Collection and Screening Representative soil samples were collected at continuous intervals (where possible) at all test locations by a Strum field representative. All soil samples were collected and sealed in glass containers...
AI summary Soil samples were collected and analyzed for VOCs using specific methods and equipment. The samples were submitted to accredited laboratories for further analysis, ensuring compliance with quality standards.
Quality Assurance & Quality Control (QA/QC) To obtain representative samples and avoid potential cross-contamination, all samples were collected by Strum field staff while wearing dedicated nitrile gloves, and while using either dedicated...
AI summary The document outlines QA/QC procedures used during environmental sampling, including sample collection methods, duplicate analysis, and the use of RPD to evaluate data consistency. It describes how RPD values are calculated and interpreted to determine the reliability of sample results.
BH/MW6 VAV PROJECT: Phase III ESA - 116 Ruth Falls Rd., Sheet Harbour, NS DRILLING DATE: December 12, 2024 DRILLER: Q-Drilling DRILL TYPE: CME-45 ELEVATION DATUM: Assumed DRILLING METHOD: Auger & Case/Core
AI summary This document provides details about a Phase III Environmental Site Assessment (ESA) project at 116 Ruth Falls Rd., Sheet Harbour, NS. It includes the drilling date, driller, drill type, elevation datum, and drilling method used for the project.
APPENDIX F ANALYTICAL RESULTS D T.1 F0. 11 V 1 Petroleum Hydrocarbo n Fractions Commis ID Lab ID Date Depth voc Benzene Toluene Ethylbenzene Xylenes F1 F2 F 3 F4 Modified TPH T 0 Sample ID Lab ID В Т E Х C 6 -C 10 C 10 -C 16 C 16 -C 21 C 2...
AI summary This appendix presents analytical results from environmental site assessments, including data on soil samples collected from various locations. The data includes measurements of petroleum hydrocarbons, benzene, toluene, ethylbenzene, and xylenes, along with comments on sample types and potential contamination sources.
2026 ACE Plan U-10 Attachment 2 Page 130 of 153 Table 1A: Tier I Soil Ecological Screening for the Protection of Plants and Soil Invertebrates; Direct Soil Contact and the Protection of Wildlife and Livestock; Soil Ingestion, 116 Ruth Fall...
AI summary This page from the 2026 ACE Plan U-10 Attachment 2 presents Table 1A, which outlines Tier I Soil Ecological Screening for the protection of plants, soil invertebrates, wildlife, and livestock at 116 Ruth Falls Road, Sheet Harbour, NS. The table likely includes screening levels for contaminants such as petroleum hydrocarbons and other pollutants.
Bold/shaded values indicate exceedance of the Atlantic RBCA ESLs - Industrial/Coarse-grained Criteria Bold/underlined values indicated exceedance of the Atlantic RBCA ESLs - Agricultural/Coarse-grained Criteria Source: CCME Canadian Enviro...
AI summary The document discusses environmental screening levels for hydrocarbons in surface soils, comparing RBCA and CCME criteria. It outlines how hydrocarbon concentrations can be compared across different fraction formats and provides lab analysis details.
Project #24-10728 Crit eria Sample ID S1(AU30) TP1-S1 TP2-S1 TP3-S1 TP4-S1 BH1-S1 BH2-S1 BH3-S1 BH4-S1 Parameter Units RDL NS Tier I EQS - Industrial, Potable, NS Tier I EQS - Agricultural, Potable, - 0.8 0.8 0.9 0.8 0.3 0.4 0.3 0.3 Coarse...
AI summary The document presents a table with environmental sampling data for various parameters, including PCBs, with results showing levels below detection limits and comparisons to environmental quality standards. The data includes sample IDs, dates, and measured values.
Shading/bold indicates exceedance of: Underlining/bold indicates exceedance of: m = metres below grade mbfl = metres below floor mbf = metres below footing nd = non-detect nd() = non-detect at elevated detection limit - = no established va...
AI summary The text presents environmental site assessment data, including soil and groundwater contamination levels, with specific reference to detection limits, standards, and analysis methods. It includes laboratory results and environmental quality standards from Nova Scotia.
TABLE 3: Groundwater Analytical Results - Petroleum Hydrocarbons - 116 Ruth Falls Road, Sheet Harbour, NS _ Petroleum Hydrocarbor Fractions 0 Labella Date Sample Type Benzene Toluene Ethylbenzene Xylenes F1 F2 F 3 F4 Modified TPH T 0 Sampl...
AI summary This table presents groundwater analytical results for petroleum hydrocarbons at 116 Ruth Falls Road, Sheet Harbour, NS. The results show levels of various hydrocarbon fractions, with some samples indicating values close to or exceeding environmental quality standards. The samples are labeled as returned to baseline or indicating fuel oil and lube oil fractions.
Value Underline/bold indicates exceedance of: NS Tier I EQS - Agricultural, Potable, Coarse-grained (Oct. 2022) GW = groundwater DW = drinking water nd = non-detect nd( ) = non-detect at elevated detection limit - = no established value or...
AI summary The text discusses environmental quality standards and hydrocarbon analysis results for groundwater at a site in Sheet Harbour, Nova Scotia. It includes details on detection limits, hydrocarbon fractions, and comparisons with environmental standards. The analysis was conducted by Bureau Veritas and references the RBCA and CCME standards.
Bold/shaded values indicate exceedance of the Atlantic RBCA ESLs - Industrial/Coarse-grained Criteria Bold/underlined values indicated exceedance of the Atlantic RBCA ESLs - Agricultural/Coarse-grained Criteria Source: Alberta Environment...
AI summary The text discusses hydrocarbon concentration screening levels based on the Atlantic RBCA ESLs, noting variations in fractions F1 and F2 compared to RBCA standards. It also highlights the applicability of these levels only when groundwater is within 3 meters of the surface and mentions the absence of screening levels for F3 and F4 due to low solubility. Lab analysis was conducted by Bureau Veritas.
Groundwater screening levels can be used for evaluating groundwater quality at locations greater than 10 meters from a freshwater or marine water body. It is recommended that surface water screening levels should be applied directly (or un...
AI summary The text discusses the application of groundwater and surface water screening levels for evaluating groundwater quality, noting that surface water levels should be used unadjusted for locations within 10 meters of a water body.
GW = groundwater NS Tier I EQS - Industrial, Potable, Coarse-grained (Oct. 2022) NS Tier I EQS - Agricultural, Potable, Coarse-grained (Oct. 2022) DW = drinking water nd = non-detect nd( ) = non-detect at elevated detection limit - = no es...
AI summary The text provides groundwater and drinking water sampling data, including detection limits, standards, and analysis results. It references environmental quality standards, risk-based corrective action, and laboratory analysis conducted by Bureau Veritas. The project number and sample collection dates are also included.
TABLE 4A: Groundwater Ecological Screening for Groundwater Discharge to Surface Water - Polychlorinated Biphenyls - 116 Ruth Falls Rd., Sheet Harbour, NS Cr iteria Sample ID MW1 MW1 MW2 MW2 MW3 MW3 MW4 MW4 FD1 Parameter Units RDL Atlantic...
AI summary This table presents groundwater ecological screening results for polychlorinated biphenyls (PCBs) at 116 Ruth Falls Rd., Sheet Harbour, NS. It includes data from multiple monitoring wells and a field discharge point, with all PCB concentrations detected below the reporting limit.
Shading/bold indicates exceedance of: Underlining/bold indicates exceedance of: GW = groundwater Atlantic RBCA Ecological Tier I EQS - Groundwater Discharge to Fresh Water (<10 m from receptor) (July 2022) Atlantic RBCA Ecological Tier I E...
AI summary The text provides environmental data related to groundwater and drinking water, referencing standards such as the Atlantic RBCA Ecological Tier I EQS and PSS. It includes details on sample collection, laboratory analysis, and detection limits for various contaminants.
Table 5: Surface Water Analytical Results - Petroleum Hydrocarbons - NSPI Substation, 116 Ruth Falls Rd, Sheet Harbour, NS Benzene Toluene Ethylbenzene Xylenes Petroleum Hydrocarbor r Fractions Sample ID Lab ID Date Sample Type Delizerie T...
AI summary Table 5 presents surface water analytical results for petroleum hydrocarbons at the NSPI Substation site. The data includes sample IDs, lab IDs, dates, and concentrations of various hydrocarbon compounds. All measured values are below the detection limits, and no exceedances of NS Tier I EQS for fresh surface water are reported.
Value Underline/bold indicates exceedance of: No Guidelines SW = Surface Water PW = Pore Water nd = non-detect nd( ) = non-detect at elevated detection limit -= no established value or not analyzed mg/L = milligrams per litre TPH = Total P...
AI summary The text provides guidelines for interpreting hydrocarbon concentration data, including definitions for terms like TPH, RDL, and RBCA, and explains how different hydrocarbon fractions can be compared to environmental standards. It outlines the types of samples collected and the laboratory analysis conducted.
Table 5A: Surface Water Analytical Results - Petroleum Hydrocarbons - NSPI Substation, 116 Ruth Falls Rd, Sheet Harbour, NS Benzene Toluene Ethylbenzene Xylenes Petroleum Hydrocarboi n Fractions Sample ID Lab ID Date Sample Type Delizelle...
AI summary Table 5A presents surface water analytical results for petroleum hydrocarbons at the NSPI Substation in Sheet Harbour, NS. The data includes sample IDs, lab IDs, dates, sample types, and concentrations of various hydrocarbon compounds. Most samples show non-detection (nd) levels, but some values are noted against the Atlantic RBCA Tier I EQS for fresh surface water.
Value Underline/bold indicates exceedance of: No Guidelines SW = Surface Water PW = Pore Water nd = non-detect nd() = non-detect at elevated detection limit -= no established value or not analyzed mg/L = milligrams per litre TPH = Total Pe...
AI summary The document provides laboratory analysis results for environmental samples, including hydrocarbon concentrations and comparisons to environmental quality standards. It outlines the methodology for analyzing hydrocarbon fractions and their relevance to regulatory guidelines.
2026 ACE Plan U-10 Attachment 2 Page 151 of 153 APPENDIX I ATLANTIC RBCA ECOLOGICAL SCREENING ASSESSMENT
AI summary This section of the 2026 ACE Plan U-10 Attachment 2 presents Appendix I, which outlines an Atlantic RBCA Ecological Screening Assessment. The document provides a detailed analysis of environmental conditions and risk assessments for a specific site.