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HomeMy WebLinkAbout26033_Depot Street_Brownfields Assessment Work Plan_Revision 2_20230620Eg ECS SOUTHEAST, LLP `Setting the Standard for Service" Geotechnical • Construction Materials • Environmental • Facilities NC Registered Engineering Firm F-1078 NC Registered Geologists Firm C-553 SC Registered Engineering Firm 3239 TM REVISION NUMBER: 2.0 BROWNFIELDS ENVIRONMENTAL ASSESSMENT WORK PLAN 59 DEPOT STREET PROPERTY 59 DEPOT STREET WAYENESVILLE, HAYWOOD COUNTY, NORTH CAROLINA BROWNFIELDS PROJECT ID. 26033-22-044 IZC&IU:Zommmr1![6 - 611Wmwll= PREPARED FOR PHG WAYNESVILLE, LLC June 20, 2023 Work Plan Certification I, Don R. Marlor, P.G., a Licensed Geologist for ECS Southeast, LLP (North Carolina Licensed Geologist Firm C-553), do certify that the information contained herein is correct and accurate to the best of my knowledge. REM Don R. Marlor, P.G. NC License No. 2645 0. SEAL 6_-33 2645 r - ,'''�rr,trrrr�,�e��``, ECS Capitol Services, PLLC • ECS Florida, LLC • ECS Mid -Atlantic, LLC • ECS Midwest, LLC • ECS Southeast, LLP - ECS Southwest, LLP ECS SOUTHEAST, LLP "Setting the Standard for Service" Geotechnical - Construction Materials - Environmental - Facilities NC Registered Engineering Firm F-1078 NC Registered Geologists Firm C-553 SC Registered Engineering Firm 3239 Ms. Carolyn Minnich June 20, 2023 North Carolina Department of Environmental Quality Division of Waste Management Brownfields Redevelopment Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Reference: Brownfields Environmental Assessment Work Plan Rev. 2.0 59 Depot Street Property 59 Depot Street Brownfields Project No. 26033-22-044 ECS Project No. 49-16550-A Dear Ms. Minnich: ECS Southeast, LLP (ECS) has prepared this work plan to collect soil, groundwater, and soil gas samples at the above referenced site. This plan has been developed at the request of the North Carolina Department of Environmental Quality (NCDEQ) Brownfields Redevelopment Section (BRS). Also included with the submittal is a completed Minimum Requirements Checklist and Assessment Work Plan Approval Signature Page. ECS appreciates the opportunity to work with your Program. If you have any questions concerning this work plan or this project, please contact us. Sincerely, ECS SOUTHEAST, LLP "% x Al'/' Don R. Marlor, P.G. Environmental Staff Project Manager 828-785-4183 dmarlor(a)-ecslimited.com P.A4(V-- Joseph P. Nestor, P.G., P.E. Environmental Principal 919-861-9846 swerleyt@-ecslimited.com Enclosures: Brownfields Environmental Assessment Work Plan Assessment Work Plan Approval Signature Page. ECS Capitol Services, PLLC • ECS Florida, LLC • ECS Mid -Atlantic, LLC • ECS Midwest, LLC • ECS Southeast, LLP • ECS Southwest, LLP www.ecslimited.com SD ROY COOPER :'P'►� Governor ELIZABETH S. BISER sr Secretary MICHAEL SCOTT NORTH CAROLINA Director Environmental Quality ATTACHMENT 1 DEQ Brownfields Redevelopment Section Assessment Work Plan Approval Signature Page To be completed by Development Team and returned to DEQ Brownfields for review & signature. Brownfields Project Name: 59 Depot Street Property Brownfields Project Number: 26033-22-044 Work Plan Title.- Brownfields Environmental Assessment Work Plan Date: June 20, 2023 Revision Number: 2.0 Be advised that this approval from DEQ Brownfields does not waive any applicable requirement to obtain any necessary permits, licenses, or certifications for the above listed activities nor does it waive any requirement to comply with applicable law for such activities. Prospective Developer (PD): PHG Waynesville, LLC Contact Person: Mr. Shaunak Patel Phone Numbers: Office: 919-854-2797 Mobile: Cl icl; or tap here to enter text. Email: Shaunak.patel@parksliotels.coin Property Owner (if different from above): C'licl< or Lap here to enter'Lcx(. Contact Person: Click or tell) hcrc to enter test. Plione Numbers: Office: Click or tap hcrc to enter text. Mobile: Click or tap hcrc to enter text. Email: Glick or tap here to enter text. Environmental Consultant: ECS Southeast, LLP Contact Person: Don R. Marlor, P.G. Phone Numbers: Office: 828-785-4183 Email: dmarlor@ecslimited.com Signature.• A 4 114 K 1, �e� � Consultant: ECS Southeast, LLP Printed Name/Title/Company: Don R. Marlor, P.G./Project Manager/ECS Southeast, LLP Brownfields Project Manager: Carolyn Minnich Phone Numbers: Office: Click or tap here to enter text Email: Click or tap here to enter text. Signature: Mobile: Clicl; or tap here to enter text. 1,1111111►Itt/1/1/11/ A O step �J SEAL. 7 OJ W OLOG�.� 00 I't�r�rlll/t/Ill/►,`'' Mobile: Click or rap here to carer text. 06/20/2023 Brownfields Project Manager: Clicl: or tap here to enter text. Date Clicl< or tap to enter a (late. e North Carolina Department of Environmental Quality I Division o` Waste Management �� 217 West Jones Street 1 1646 Mail Service Center I Raleigh. North Carolina 27699-16,16 o-i� 919.70t.8200 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B TABLE OF CONTENTS 1.0 INTRODUCTION.....................................................................................................................1 2.0 SCOPE OF WORK.................................................................................................................3 3.0 SAMPLING METHODOLOGY..............................................................................................5 4.0 LABORATORY ANALYSIS...................................................................................................9 5.0 QUALITY ASSURANCE/QUALITY CONTROL...............................................................10 6.0 INVESTIGATION DERIVED WASTE MANAGEMENT...................................................10 7.0 REPORTING.........................................................................................................................10 FIGURES Figure 1 Site Topographic Location Map Figure 2 Site Location and Historical Sample Location Map Figure 3 Proposed Soil Sample Location Map Figure 4 Proposed Groundwater and Soil Gas Sample Location Map TABLE Table 1 Brownfields Program Checklist for Proposed Sample Locations APPENDIX Appendix A Historical Sample Location Figures and Laboratory Analytical Data Tables 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B 1.0 INTRODUCTION The 59 Depot Street Property site (the Subject Site) consists of a single parcel and a total of 0.378 acres of land (see Figures 1 and 2). It is in a commercial area of Waynesville south of Depot Street and west of Montgomery Street. The Subject Site is currently vacant with paved areas. The Subject Site is identified by the Wake County Online GIS Database with the following Parcel Identification Numbers (PINs) and street address: Street Addresses PINs Parcel Size (Acres) 59 Depot St. 8615-37-2937 0.378 The prospective developer (PD), PHG Waynesville, LLC, submitted a Brownfields Property (BP) Application on May 17, 2022. Subsequently, on August 27, 2022, a Letter of Eligibility (LOE) for the Subject Site was issued by the Brownfields Redevelopment Section (BRS) to the PD to pursue a brownfields agreement. The proposed redevelopment plan will include a mixed -use structure consisting of multifamily retail space, associated structured parking, and hotel. ECS Southeast, LLP (ECS) previously completed a Phase I Environmental Site Assessment, Environmental Assessment, and one subsurface exploration and geotechnical evaluation, which included historical environmental data research and soil, soil gas, and groundwater quality sampling and analyses. The scope and findings of the prior assessment work includes the following: ECS completed a Phase I Environmental Site Assessment (Phase I ESA) at the site dated March 17, 2022 (ECS Project No. 49-16550). Based on the information included in the Phase I ESA, the Subject Site was vacant land from 1896 through 1924, when a residence was constructed on the property. The subject property was developed with a residence until the mid-1950s, when a building was constructed on the property. The building was reportedly operated by a restaurant. City directories indicated that the subject property was occupied by The Pancake House in the 1990s and Mitchell's Country Kitchen in the early 2000s. A carpet cleaning business was in operation at the subject property in 1995. The commercial building on the subject property appeared to be vacant from 2005 until it was demolished in July 2021. Additionally, adjoining properties were historically occupied by printing and dry-cleaning facilities. The Phase I ESA identified the following Recognized Environmental Conditions (RECs): o A groundwater sample was collected by the Dry -Cleaning Solvent Act (DSCA) program at the Subject Site as part of assessment associated with the Central Cleaners facility located at 44 Church Street. Laboratory analysis of this groundwater sample indicated tetrachloroethene above North Carolina 15A NCACO2L.0202 Groundwater Standards and the North Carolina Groundwater Screening Level for Vapor Intrusion for both residential and non-residential use. ECS considers the documented groundwater contamination at the subject property to represent a REC for the subject property. o The subject property was occupied by a carpet cleaning business in 1995. Based on the potential for solvent use at this facility and an undocumented release to have occurred at the subject property, ECS considers this to represent a REC for the subject property. 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B o Adjoining properties were historically occupied by dry cleaning facilities and printing facilities. Based on the potential of undocumented releases to have impacted the subject property, ECS considers the historic use of the adjoining properties to represent a REC for the subject property. • In an effort to identify potential contamination associated with the RECs identified during the Phase I ESA, ECS performed an Environmental Assessment at the site in April 2022 (ECS Project No. 49:16550-A, report dated May 3, 2022) which included collection of four soil and soil gas samples (SB-1/SG-1 through SB-1/SG-4) and three groundwater samples (MW-1 through MW-3). Below is a summary of the findings: o Soil samples were analyzed for Volatile Organic Compounds (VOCs) and Semi -Volatile Organic Compounds (SVOCs). Soil sample SB-1 detected tetrachloroethene above its Protection of Groundwater Preliminary Soil Remediation Goal (PSRG) and toluene above its laboratory reporting limit. Other targeted compounds were not detections above laboratory reporting limits. o Groundwater samples were also analyzed for VOCs and SVOCs. Laboratory analysis of the groundwater sample collected from MW-1 detected tetrachloroethene at a concentration above its respective NC2LGWQS. Cis- 1,2-dichloroethene, tetrachloroethene, and trichloroethene were detected in groundwater sample MW-2 at concentrations above their respective NC2LGWQS. Concentrations of tetrachloroethene, and trichloroethene in MW- 2 also exceeded their respective Residential and Non -Residential Groundwater Screening Levels (GWSL) for Vapor Intrusion (VI). Groundwater sample MW-3 detected tetrachloroethene and trichloroethene above their respective Residential GWSL for VI. The concentration of tetrachloroethene detected in MW-3 was also above its respective Non -Residential GWSL for VI. o Soil gas samples were analyzed for VOCs. Laboratory analysis of soil gas sample SG-1 detected benzene and 2-propanol above their respect Residential Vapor Intrusion Screening Level (VISLs). Soil gas sample SG-2 detected benzene and Tetrachloroethene above their respective Residential VISLs. Soil gas sample SG-3 detected benzene and 2-propanol above their respective Residential VISLs. Soil gas sample SG-4 detected benzene, chlorobenzene, 2-propanol, tetrachloroethene, 1,2,4-trimethyl benzene, 1,3,5- tri methyl benzene, and o-xylene above their respective Residential VISLs. Additionally, the concentration of tetrachloroethene identified in soil gas sample SG-4 was above its respective Non -Residential VISL. A kickoff meeting was subsequently conducted with the Brownfields Redevelopment Section (BRS) of the Division of Waste Management (DWM) of the North Carolina Department of Environmental Quality (NCDEQ) on March 1, 2023 to review the earlier assessment findings, and to discuss additional work needed to fill data gaps for BRS. Historical sample location figures and laboratory analytical data tables are included in Appendix A. This Work Plan is intended to fill those data gaps. The identified data gaps, which are the focus of this work plan, included the following: • Further assess soil and/or groundwater quality across the site. • Collect additional soil gas data at the site. The data obtained from executing this work plan is intended for use by the BRS and not other regulatory programs. 2 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B Brownfields Project Contact Information The contact information for the property owner, environmental consultant, and BRS is as follows: Developer's Representative: Mr. Shaunak Patel PHG Waynesville, LLC 4242 Six Forks Road Suite 1600 Raleigh, NC 27609 919-854-2797 Shaunak.patelC@parkshotels.com Site Environmental Representative: Mr. Don R. Marlor ECS Southeast, LLP 1900 Hendersonville Road Suite 10, Asheville, NC 28803 828-785-4183 dmarlor(@ecslimited.com BRS Contact: Brownfields Redevelopment Section NCDEQ Division of Waste Management BRS Cc: Ms. Carolyn Minnich Project Manager, BRS Carolyn. min nich(a)ncdenr.gov 2.0 SCOPE OF WORK The objective of this work plan is to provide a description of proposed soil, groundwater, and soil gas assessment activities requested by BRS in the March 1, 2023 kick off meeting. During the kick off meeting with BRS indicated they it reviewed the following reports: Phase I Environmental Site Assessment, ECS, March 17, 2022 • Report of Environmental Assessment Services, ECS, April 28, 2012 Based upon the review by BRS of the referenced reports, data gaps were identified which the BRS has requested to be assessed. Proposed additional soil sample locations are shown Figure 3. Proposed additional groundwater and soil gas sample locations are shown on Figure 4. In order to meet the requests of the BRS and address data it identified, the following subsections describe the scope of work is to be conducted under this work plan. The scope of work is to be performed in general accordance with the Minimum Requirements Checklist for Site Assessment Work Plans and Reports issued by the BRS in March 2023. 3 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B 2.1 Pre -Assessment Tasks Prior to assessment activities, ECS will contact North Carolina One Call (NC811) to identify public underground utilities at the site. This notification requires 72-hour response time exclusive of weekends and holidays. Our experience indicates that 811 normally does not locate private utilities. As such, ECS will provide a private utility locator to locate subsurface utilities in proposed soil boring, temporary monitoring well, and soil gas sample locations both interior and exterior to subject site buildings to clear utilities at the proposed boring locations. 2.2 Receptor Survey ECS will complete a Brownfields Property Receptor Survey for the Subject Site and submit with the Brownfields Assessment Report. 2.3 Soil Assessment ECS will contract with a drilling firm that employs a North Carolina Certified Well Contractor (NCCWC) to advance six (6) soil borings for the collection of soil quality samples in the area of proposed soil removal. The borings will be advanced using a direct push technology (DPT) track - mounted drill rig. Figure 3 has been included as a proposed in -situ sample boring location map and illustrate the approximate locations of the proposed soil borings identified as B-1 through 13- 6. Information from the cut and fill map has been superimposed onto Figure 3. Borings will be completed with a Direct Push Technology (DPT) drill rig provided by the drilling firm. The depth of the borings will range from five (5) to approximately fifteen (15) feet below ground surface (bgs) and are dependent upon the existing grade and cut plans associated with the site's redevelopment. Additionally, ECS proposes to advance one (1) boring in the vicinity of former soil sample SB-1 to further evaluate the previous Tetrachloroethene detection above its Protection of Groundwater Preliminary Soil Remediation Goal (PSRG). The boring (B-7) will be advanced to approximately 10 feet bgs. The exact locations of the soil borings will be determined in the field to avoid buried utilities, although will be placed in the approximate locations illustrated on Figure 3 and advanced to the approximate depths as summarized in Table 1. Soil borings will be abandoned by the drilling firm upon completion of the sampling event. 2.4 Groundwater Assessment ECS will contract with a drilling firm that employs a NCCWC to install three (3) permanent monitoring wells for groundwater sample collection. The borings will be advanced using hollow stem augers with a track -mounted DPT drill rig. Proposed monitoring wells are to be identified as MW-4 through MW-6 and their approximate proposed locations are illustrated on Figure 4. The exact locations of the wells will be determined in the field in order to avoid buried utilities. The wells are proposed to be drilled to approximately 35 feet to 45 feet below bgs (approximately 10 feet into the shallow groundwater table based upon prior assessment data available for the site). The monitoring wells will be constructed per North Carolina Administrative Code (NCAC) 2C well construction standards utilizing 2-inch diameter PVC well screen (0.010-inch slot size) and riser pipe with its screen straddling the water table. 2.5 Exterior Soil Gas Assessment Four (4) soil gas samples will be collected. There will be two (2) soil gas samples (SG-5 and SG- 6) collected from the locations of proposed stairwells. One (1) soil gas sample (SG-7) will be collected from the eastern portion of the building footprint and one (1) additional soil gas sample 4 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B (SG-8) will be collected from the location of the proposed elevator shaft. Figure 4 shows the proposed exterior soil gas sample locations superimposed over proposed construction details proved by the PD. The exact locations of the soil gas vapor points will be determined in the field in order to avoid buried utilities. SG-5, SG-6, SG-7 and SG-8 will be collected at an approximate depth of 15 feet (bg) as requested by BRS. The borings for the exterior soil gas sample points will the excavated by advancing a macrocore soil sampler with a DPT drill rig. Proposed exterior soil gas sample depths with additional descriptions are included in Table 1. 2.6 Additional Tasks The top of casing for each of the proposed permanent monitoring wells will be surveyed by a North Carolina Licensed Surveyor upon completion of the wells. This data along with dept to groundwater data will be used to calculate the groundwater elevation at each monitoring well which in turn will be used to estimate the groundwater flow direction. The surveyor will also determine the horizontal location of each to the proposed soil borings, exterior soil gas monitoring points, and monitoring wells as well as the elevation of the ground surface at each of these sample points. The data collected by the surveyor will be tabulated and included in the Brownfields Assessment Report. Following receipt of laboratory results and approval by BRS, the permanent monitoring wells will be abandoned by the drilling firm prior to construction activities. Well construction completion and abandonment forms will be provided in the Brownfields Assessment Report. Borings logs for the proposed soil and groundwater sample locations will be completed in the Brownfields Assessment Report. 2.7 Reporting A Brownfields Assessment Report summarizing the methods utilized and results of the sampling outlined in this work plan will be submitted to the BRS. If unidentified and unexpected conditions are encountered during the assessment, ECS will consult with the BRS. The BRS will be notified 5 days prior to starting the field work. 3.0 SAMPLING METHODOLOGY 3.1 Soil Sample Collection Soil sampling will be conducted in general accordance with the NCDEQ, Inactive Hazardous Sites Program Guidelines for Assessment and Cleanup (September 2022). The DPT drill rig will advance borings from ground surface to termination depths ranging from approximately 5 feet bgs to a maximum of 15 feet bgs. Two discreet VOC soil samples will be selected from borings B-1 through B-6 under the supervision of ECS' field environmental professional. One composite soil sample will be collected for SVOCs, the eight metals regulated under the Resource Conservation and Recovery Act (RCRA 8 Metals), and hexavalent chromium from each of the three cut intervals within Cell-1 as indicated on Figure 3. ECS will remove and cut the disposable PVC liners produced by the DPT drill rig to expose the soil core and place an aliquot of soil from each approximate interval of cut 0 feet to 2 feet bgs, 2 feet to 4 feet bgs, and 4 feet to the termination depth directly into laboratory supplied sample containers using a terra core sampler. A second aliquot of soil from each cut depth and boring will be placed directly into resealable plastic bag to screen the soil samples for relative levels of volatile organic vapors using a photoionization detector (PID) or similar device and for composite sampling purposes. Samples collected from two intervals from each boring (0 feet to 2 feet bgs, 2 feet to 4 feet bgs, or 4 feet to the termination depth) with the highest PID reading will be submitted for VOC analysis. If elevated volatile organic vapor concentrations or visual/olfactory observations indicate evidence of soil impacts, ECS will denote these observations on the soil boring log. Borings will be abandoned by the drilling firm upon completion in general accordance with NCAC 2C standards. The soil borings 5 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B will be advanced using a macro core soil sampler driven by a DPT drill rig. The borings may be limited by refusal from buried material from the prior development. If groundwater is encountered prior to reaching the proposed depths, the apparent groundwater depth will be noted, and the soil sample selected for laboratory analysis will be collected from soils above the apparent soil - groundwater interface. The discrete soil samples are to be analyzed by EPA Method 8260 for VOCs. The composite soil samples are to be analyzed by EPA Method 8270 for SVOCs, EPA Method 6020/7471 for RCRA 8-Metals, and hexavalent chromium by EPA Method 7199 in accordance with the attached Table 1. VOC samples will be taken as described above; soil that has been screened with the PID will be ineligible for sampling and will not be submitted to the laboratory for analysis. Soil samples will be delivered to the laboratory within 48 hours of collection as reasonably practical. If circumstances do not allow the samples to be delivered within 48 hours, sample coolers will be restocked with ice and stored under chain of custody (COC) until delivered to the laboratory. If samples are not delivered to laboratory within 48 hours, ECS will provide documentation that samples were kept on ice and were secure until received by laboratory. Following the collection of representative soil samples from each boring within each cell, SVOCs, RCRA 8-Metals, and hexavalent chromium samples will be composited by gently mixing three representative samples collected from each boring within each cell which will result in a single composite sample for each the three cells. Samples will be collected into laboratory supplied/preserved containers. Following collection, they will be placed in an ice -chilled cooler for transportation to the laboratory. VOCs grab samples, and SVOCs and RCRA 8-metals composite samples will be taken as follows: Cell 1 will have one (1) will have three composite samples and twelve (12) discrete VOC samples. • CELL-1 (0-2) Composite, representative of approximately 532 cubic yards. • CELL-1 (2-4) Composite, representative of approximately 532 cubic yards. • CELL-1 (4-T) Composite, representative of approximately 345 cubic yards. • 131, B2, B3, B4, B5, B6 (Grab), two samples from each boring. Soil boring B-7, located in the vicinity of former soil sample SB-1, will be collected from a depth of approximately 5 feet bgs at a similar depth to former sample SB-1. Soil sample B-7 will be analyzed by EPA Method 8260 for VOCs, EPA Method 8270 for SVOCs, EPA Method 6020/7471 for RCRA 8-Metals, and hexavalent chromium by EPA Method 7199 in accordance with the attached Table 1. Following collection, the sample will be placed in an ice -chilled cooler for transportation to the laboratory. Duplicate soil samples will be collected at a rate of one duplicate sample per container type, per field day during the soil assessment for Quality Assurance/Quality Control (QA/QC) purposes. The duplicates (DUP-1, DUP-2, etc.) will be submitted to the laboratory for the same soil analyses as the sample they are duplicating (See Table 1). Assuming that unexpected soil conditions are not encountered, at the completion of the soil boring and sampling activities, soil cuttings generated will either be placed back into the various soil borings or spread onsite in the vicinity of the boring locations. Should groundwater be encountered within a boring, bentonite will be added prior to topping the boring with soil cuttings. 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B 3.2 Groundwater Sample Collection The monitoring wells will be developed immediately after installation by overpupmping and surging with a surge block. Following a minimum of 24 hours after the monitoring well development activities are complete, the wells will be gauged for depth to groundwater and sampled by low -flow sampling techniques. The groundwater samples will be collected with the use of a bladder pump and new clean disposable polyethylene tubing in permanent well locations. The balder pump will be decontaminated prior to use at each well. Water level measurements will be collected during low -flow sampling and ECS will attempt to limit the drawdown in each ell to less than one foot. ECS will keep track of the volume of water removed from each well. Groundwater geochemistry measurements including pH, temperature, conductivity, and turbidity will be collected at intervals of approximately 3 to 5 minutes with the use of a flow through cell and water quality meter. Samples will be collected when geochemical parameters have stabilized or after 90 minutes of low flow pumping. Stabilization will be considered to have occurred when three consecutive reading indicate: • pH remains constant within 0.1 Standard Units (SU) • Specific Conductance varies no more than 5 percent • Turbidity varies no more than 10 percent or is less than 10 Nephelometric Turbidity Units (NTUs) Three groundwater samples (MW-4 through MW-6) will be collected into laboratory supplied/preserved sample containers once geochemistry parameter measurements. The groundwater samples will be submitted for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA 8-Metals by EPA Method 6020/7470 in accordance with the attached Table 1. Groundwater samples will be delivered to the laboratory within 48 hours of collection. If circumstances do not allow the samples to be delivered within 48 hours, sample coolers will be restocked with ice and stored under chain of custody (COC) until delivered to the laboratory. If samples are not delivered to laboratory within 48 hours, ECS will provide documentation that samples were kept on ice and were secure until receipt by laboratory. In addition to these groundwater samples, the BRS typically require additional samples submitted for laboratory analysis consisting of a minimum of one duplicate sample per analysis per day and a trip blank (for VOC analysis only) per each sample shipment. Therefore, ECS proposes one (1) additional duplicate groundwater sample for analysis for each day of sampling and one (1) trip blank for VOC analysis. In addition, will collect one (1) equipment blank by pumping distilled water through the bladder pump after it has been decontaminated. See the attached Table 1 for a summary of the groundwater sampling and analysis. 3.3 Exterior Soil Gas Sample Collection Four (4) soil gas samples will be collected. Soil gas samples (SG-5 through SG-8) will be exterior soil gas samples collected at depth approximately 20 feet bgs. The soil gas sampling will be conducted in general accordance with the NCDEQ Vapor Intrusion Guidance (March 2018, Version 2). The borings for the exterior soil gas sample points will the excavated by advancing a macrocore soil sampler with a DPT drill rig. Samples will be analyzed by EPA Method TO-15 for VOCs, including naphthalene. Refer to Table 1 for proposed sample depths. Once each external boring has reached termination depth, dedicated Nylafow tubing and a stainless -steel expendable implant will be lowered into the boring. Coarse filter sand will placed around and approximately 1 foot above the implant. The remaining space above the sand will consist of bentonite which will be hydrated with distilled water. An air -tight cap will be attached to the above -ground end of the Nylaflow tubing and will remain in place until sampling is performed. 7 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B The DPT installed exterior soil gas points will be allowed to stabilize for a minimum of 24 hours before soil gas sample collection. The soil gas points will be purged at time of installation. Prior to collecting the soil gas samples in Summa canisters, a shut-in test will be conducted to assess for leaks. Additionally, the seal of each sampling point will be leak tested using helium gas. A shroud, and a helium detector as recommended in NCDEQ- DWM Vapor Intrusion Guidance. A shroud will be placed and sealed over each sampling point, sample train, and Summa canister. The shroud will be flooded with laboratory grade helium via the hose placed through the shroud wall. The concentration of helium inside the shroud will be measured with a helium detector (Model MGD 2002 Multi -Gas Leak detector or similar device). The sample train and interstitial space of each sampling point will be purged of at least 3 volumes via tubing routed through the wall of the shroud to a syringe. The flow rate during purging will be at a rate of approximately 200 milliliters per minute or less. Following purging, a soil gas sample will be withdrawn and extracted soil gas will be directed to a Tedlar bag and monitored with a helium detector. If the concentration measured in the Tedlar bag is less than 10 percent of the helium concentration inside the shroud, the seal on the sampling point and sampling train will be considered to be tight and not leaking. If a leak is noted, ECS will make adjustments and repeat the testing process. ECS will obtain either one -liter or similar Summa canisters from a commercial laboratory that follows National Environmental Laboratory Accreditation Program (NELAC) standards and participates in the National Environmental Laboratory Accreditation Program (NELAP). Each canister will be pre -cleaned and pre -evacuated so that it is under negative pressure (i.e., under vacuum). The canisters will be individually or batch certified by the laboratory. Each Summa canister will be outfitted with a flow regulator set to 200 milliliters per minute and a vacuum gauge. ECS will check and note the vacuum on each Summa canister before initiating the sampling procedure. If the initial vacuum prior to sample collection is less than 10 percent of the vacuum documented by the laboratory at shipment, the Summa canister will not be used. ECS will open the valve on each Summa cannister to initiate sampling. Flow will be regulated at a rate of approximately 200 mL/min. ECS will terminate the sampling procedure at each sampling point while a vacuum of at least 5 inches of mercury is still present in the canister. ECS will note the vacuum for each canister at the end of the sampling procedure. The vacuum in the canister will be recorded before and after sample collection. Sample collection will terminate when the vacuum reaches approximately 5 inches of mercury (in-Hg). Other parameters that will be measured include ambient temperature before and after sample collection and weather conditions at the time of sample collection. The Summa canisters will be submitted to a NELAP certified laboratory for analyses of VOCs by EPA Method TO-15. ECS will request that the laboratory analyze vapor samples for the most current and applicable standards from NELAP. The laboratory will be instructed to use reporting limits below the applicable NCDEQ screening levels to the extent technically feasible and to report the vacuum measurement for each sample canister at receipt by the laboratory. Additionally, the laboratory will report method detection limits and J-Flags in the laboratory analytical report. One (1) duplicate soil gas samples, collected with a sample "T", will to be collected from the approximate proposed soil gas sample location identified as SG-1. The sample, identified as DUP-3, will be submitted for the same air analysis as the samples they are duplicating (See Table 1). E:3 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B 3.4 Deviation from Approved Plan This work plan is intended to be dynamic and to be adapted to specific and actual site conditions. Accordingly, should such conditions warrant a change either by addition, deletion, or modification of a procedure, such may be accomplished with agreement between a PHG Waynesville, LLC representative and ECS after consultation with, and subject to approval by the Program. Such changes will comply with applicable local, State, and Federal rules and regulations. A written amendment shall be prepared and submitted to the BRS for approval (the use of e-mail correspondence shall suffice for approval, followed by a hard copy or electronic copy provided on Disk or similar media) prior to implementation. Amendments must have the approval of the BRS prior to implementation. 4.0 LABORATORY ANALYSIS 4.1 Soil Analytical Following sample collection, the sample containers will be labeled and maintained under chain - of -custody until delivered to Pace a North Carolina certified laboratory located in Asheville, North Carolina. Pace currently holds NC Lab Certification #40. A COC document will be utilized throughout the collection and transportation of the samples. The soil quality samples collected from the proposed boring locations will be analyzed for VOCs by EPA Method 8260 or SVOCs by EPA Method 8270, RCRA 8-metals by EPA Methods 6020/7471 and hexavalent chromium by EPA Method 7199 as indicated in Table 1. One duplicate per day or per 20 soil samples collected will also be collected into laboratory supplied/preserved containers. The duplicate(s) will be submitted for analysis of VOCs by EPA Method 8260. Additionally, the duplicate(s)sample will be submitted for analysis of SVOCs by EPA Method 8270, EPA Method 6020/7471 for RCRA 8-Metals, and Cr VI by EPA Method 7199. The laboratory's Reporting Limits (RLs) and/or Method Detection Limits (MDLs) will be reported at or below Residential and Industrial/Commercial Preliminary Soil Remediation Goals (PSRGs) (to the extent feasible), and J-Flags (laboratory estimated concentrations) will be reported. A Level II QA/QC package will be reported by the laboratory. 4.2 Groundwater Analytical Following sample collection, the sample containers will be labeled and maintained under chain - of -custody until delivered to Pace. The groundwater samples will be analyzed for VOCs using EPA Method 8260, SVOCs using EPA Method 8270, and RCRA 8-metals by EPA Methods 6020/7470. The laboratory's RLs and/or MDLs will be reported at or below NC2LGWQS and the Residential and Non -Residential Vapor Intrusion Screening Levels (VISLs) (to the extent feasible), and J-Flags will be reported. A Level II QA/QC package will be reported by the laboratory. One duplicate groundwater sample and one equipment blank sample will also be collected into laboratory supplied/preserved containers. These samples will be submitted for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA 8-Metals by EPA Method 6020/7470. 4.3 Soil Gas Analytical Individually certified 1-Liter Summa canisters utilized for soil gas sampling will be labeled and shipped to Pace, to be analyzed for VOCs using EPA Method TO-15, including naphthalene. The laboratory will be instructed to analyze the samples and report MDLs. The laboratory's MDLs will be reported at or below the Residential and Non -Residential VISLs (to the extent feasible), and J-Flags will be reported. A Level II QA/QC package will be reported by the laboratory. 9 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B 5.0 QUALITY ASSURANCE/QUALITY CONTROL 5.1 Soil Samples The two duplicate (non -background) soil samples will also be collected into laboratory supplied/preserved containers. One sample will be submitted for analysis of VOCs by EPA Method 8260. Additionally, one soil sample will be submitted for analysis of SVOCs by EPA Method 8270, EPA Method 6020/7471 for RCRA 8-Metals, and hexavalent chromium by EPA Method 7199. Following sample collection, the sample containers will be labeled, placed in a cooler with ice, and delivered to Pace in Asheville, North Carolina. A COC document will be utilized throughout the collection and transportation of the samples. 5.2 Groundwater Samples One duplicate groundwater sample and one equipment blank sample will also be collected into laboratory supplied/preserved containers. The sample will be submitted for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, and RCRA 8-Metals by EPA Method 6020/7470. One trip blank per cooler will also be analyzed for VOCs using EPA Method 8260. Following sample collection, the sample containers will be labeled, placed in a cooler with ice, and delivered to Pace in Asheville, North Carolina. A COC document will be utilized throughout the collection and transportation of the samples. 5.3 Interior and Exterior Soil Gas Samples Each Summa canister will be individually certified for the exterior soil gas samples. One duplicate soil gas sample will be collected for laboratory analysis by EPA Method TO-15 utilizing a sampling "T. Following sample collection, the sample containers will be labeled, and delivered to Pace in Asheville, North Carolina or applicable delivery company. A COC document will be utilized throughout the collection and transportation of the samples. 6.0 INVESTIGATION DERIVED WASTE MANAGEMENT The investigative derived waste (IDW) expected to be generated includes soil from the soil borings and temporary monitoring well installations, and groundwater from the temporary well development and groundwater sampling activities. Soil cuttings generated will either be placed back into the various soil borings or spread onsite in the vicinity of the boring locations. Groundwater will be containerized onsite pending receipt of laboratory analytical results and will be subsequently managed in accordance with Section 8.5 Investigation -Derived Waste of the NCDEQ, Inactive Hazardous Sites Program Guidelines for Assessment and Cleanup of Contaminated Sites (July 2021). 7.0 REPORTING ECS will prepare a written report documenting the field activities, sampling procedures, laboratory analytical results, conclusions, and recommendations for submission to the Program. The report will include sample location figures, including a shallow groundwater surface map with graphic scale and north arrow, soil and groundwater sample result summary tables, and copies of the North Carolina certified laboratory analytical reports. Results will also be input into the Division of Waste Management risk calculator and comparted to Residential and Non -Residential risk 10 59 Depot Street Property - Brownfields Environmental Assessment Work Plan Brownfields Project #26033-22-044 ECS Project No. 49-16550-B scenarios. Soil boring logs, monitoring well installation/abandonment records, and field screening calibration documentation will also be included as additional information located in Appendices to the report. The final report will include ECS' Licensed Geologist/Engineering Firm number and bear the seal of the certifying North Carolina Licensed Geologist or Professional Engineer. 11 FIGURES 3aaa � �M pU nre•y FIA�TOP p ' 76 23 Bus � � 74 23 ,--�.I� ���_ �y 51 ��. � %�, a �O S BRADLEY .:} ,c, .. Cep <\ y�P NESVILLE A ,, MONTE R V WAYISTA DR 3600 WAYNESVILLE Garrett Hillcrest 00�\ 9�F Memorial Park P� A \\ m 0 Q23\,. NO v J -\ 74 �� ? co RRACE DR,r TE 3000 S� 2800 ' ��o N1�LSlDE 5 h 1 TI, 9 (e C O V G 0 /WALNUT ST Bus PSN\ \ \ , 23 i 2 HF <�AN 51 S6 j0 Sie �� oVP {. �rL �6` f a 4TN ST sT ST WAL ,you 9�r� � FpS SUNNYSID£ ST S� � F ST S SMP TH �� T SST c" Rc 2800 ST 4, a. p K�CCIP� BOYD AVE O � D41 S a 23 z 74 j OFOI £ 'a00 BURMA RD 08 RD S� SCtob ESVILLE WAYN Green .. Hill Cem THOMAS PARK DR HODGES z O ti i � �. 76 ?f< W000 a�- )Hazelwood _ E W SL ' C J AS _: Y �&" / Q 3 m ROLLING DR ���C Y E R6cai 'Source: USGS Topographic Quadrangle Maps: ® Clyde, NC. 2019-08-16 (NE) I G V o CRY ME�CO )100 o fARLfY ST r Waynesville, NC. 2019-07-23 (SE) Hazelwood, NC. 2019-07-29 (SW) D=1llwood,NC.2019-07-29(NW) 1 inch=2000�ft." RIDGEp \n 2810- q -- �� f PROJECT#: 49-16550-B 59 Depot Street Property DRAWN BY: TL 59 Depot Street ASSIGN TO: DM Waynesville, Haywood County, NC 28786 PE: JN DATE: June 8, 2023 Figure REVISED: ---- Site Topographic Location Map 1 SCALE: 1"=2000' PRINTED: 6/8/20236:00 PM C:\,nellrive- ECSCorporate Services\DWG\Projects\49\16550 Depot Street\B\49-16550-B Figures-Rl 1 Former American Cleaners 1 (REC) i p0 - s t Street a P Aerial Photo Source: Google Earth April 2022 OSE L� ko Scale 0 15 30 1 inch =30 ft. PROJECT#: 49-16550-B 59 Depot Street Property DRAWN BY: TL 59 Depot Street ASSIGN TO: DM Waynesville, Haywood County, NC 28786 Ef%m PE: JN DATE: June 8, 2023 CSite Location and SCALE: 1"=30' Figure REVISED: ---- Historical Sample Location Map PRINTED: 6/8/20236:00 PM I C:\OneDrive- ECS Corporate Services\DWG\Projects\49\16550 Depot Street\B\49-16550-B Figures -RI Oe00t Scree t WW Source of Cut and Fill Plan: WSP USA Environment 5 Infrastructure Inc.; Dated March 23, 2022 LEGEND O - Proposed Soil Sample 5' bgs - Proposed Depth (below ground surface) NOTE: ECS Proposes 3 Cut Intervals in CELL 1 0-2' (Approx. 532 Cu. Yds.) 2'-4' (Approx. 532 Cu. Yds.) 4'-Termination (Approx. 345 Cu. Yds.) Scale 0 15 30 1 inch =30 ft. Erm PROJECT#: 49-16550-B 59 Depot Street Property 59 Depot Street Waynesville, Haywood County, NC 28786 DRAWN BY: TL ASSIGN TO: DM PE: JN Proposed Soil Sample Location Map Figure 3 DATE: June 8, 2023 REVISED: ---- SCALE: 1"=30' PRINTED: 6/8/20236:00 PM C:\OneDrive- ECS Corporate Services\DWG\Projects\49\16550 Depot Street\B\49-16550-B Figures-Rl 1. LEGEND ■ - Proposed Soil Gas Sample Proposed Monitoring Well /- Groundwater Sample Location (April 11, 2022) N / O - Soil and Soil Gas Sample Location (April 11, 2022) 35' bgs - Proposed Depth (below ground surface) r ti o , 1 M 6 35' bgs SB 1/SG 1�. / 0S1371/,SG- . r1 /Alk 15' bgs �45' bgs; �yiW-1/SB-5 - SG-6 r' SB 2/SGz2-e gs SG-8 J1 r► / 15' bgs - SG- �� BMW-SNrW-2 W I ��L i c i , ' ' ,, 40' bgs yo SG-5 : " 0 a� 15' bgs ( 1 / 416 I- j Scale t 0 15 30 ~ Source of Garage Level Plan: rba architecture interiors; dated August 30, 2022 '- � 1h =30 ft. PROJECT #: 49-16550-B 59 Depot Street Property DRAWN BY: TL 59 Depot Street ASSIGN TO: DM Waynesville, Haywood County, NC 28786 PE: JN DATE: June 8, 2023 Proposed Groundwater and Figure REVISED: ---- Soil Gas Sample Location Map SCALE: 1"=30' /� PRINTED: 6/8/20236:OOPM C:\DneDrive-ECSCorporateServices\DWG\Projects\49\16550DepotStreet\B\49-16550-BFigures-Rl �} TABLE TABLE 1 - PROPOSED SAMPLE LOCATIONS & ANALYSIS 59 DEPOT STREET PROPERTY BROWNFIELDS PROJECT ID.: 26033-22-044 ECS PROJECT NO. 49-16550-B Sample Media Laboratory Analysis & Analytical Method Proposed Boring Depth VOCS7­7 sVOCs RCRA Metals Cr VI Composite Soil Samples CELL 1 0-2 NA 8270E 6020C/7471 7199A NA CELL 2 24 NA 8270E 6020C/7471 7199A NA CELL 3 4-T NA 8270E 6020C/7471 7199A NA Grab Soil Samples B-1 8260D NA NA NA 15 Feet B-2 8260D NA NA NA 7 Feet B-3 8260D NA NA NA 5 Feet B-4 8260D NA NA NA 8 Feet B-5 8260D NA NA NA 7 Feet B-6 8260D NA NA NA 4 Feet B-7 8260D NA NA NA 7 Feet *Please note that two grab soil samples for VOC analysis will be collected from each boring. Groundwater Samples MW4 8260D 8270E 6020C/7471 NA 45 Feet MW-5 8260D 8270E 6020C/7471 NA 40 Feet MW-6 8260D 8270E 6020C/7471 NA 35 Feet Soil Gas Samples SG-5 TO-15 NA NA NA 15 Feet SG-6 TO-15 NA NA NA 15 Feet SG-7 TO-15 NA NA NA 15 Feet SG-8 TO-15 NA NA NA 15 Feet Quality Assurance Samples DUP-1 soil NA 8270E 6010C/7471 7199A NA DUP-2 soil 8260D NA NA NA NA DUP-3(groundwater) 8260D 8270E 6020C/7471 NA NA DUP-4 soil as TO-15 NA NA NA NA EQR (equipment rinse rondwater 8260D 8270E 6010C/7471 7199A NA TB(trip blankgroundwater) 8260D NA NA NA NA Notes: VOCs = Volatile Organic Compounds SVOCs = Semi -Volatile Organic Compounds RCRA = Resource Conservation & Recovery Act Cr VI = Hexavalent Chromium NA = Not Analyzed for the analysis APPENDIX A Historical Sample Location Figures and Laboratory Analytical Data Tables SITE 2+0-r1; �1' Iil"m D 25 Lake Ls a lunaluska� 0 e6W" Lake Junaluska ri v ..'?�k�-Me°rs Y Y Yuutw"� / MEEK olJpen,Gup .:,_V�eryhYt FIGURE 1 w SOURCE: SITE LOCATION MAP USGS TOPOGRAPHIC MAP 59 DEPOT STEET ASSESM ENT SERVICIES WAYNESVILLE, HAZELWOOD, CLYDE, AND 59 DEPOT STREET DELLWOOD, NORTH CAROLINA QUADRANGLE WAYNESVILLE, HAYWOOD COUNTY, DATED 2019 NORTH CAROLINA Ai ECS PROJECT NO. 49:16550-A SCALE: 1:24,000 rM LEGEND 4� ® GROUNDWATER SAMPLE LOCATION f ASOIL AND SOIL GAS SAMPLE LOCATION t • r i r ti LL /r., 6L..' ZL'I MW-3 SB-1 /SG-1 IPA- r -6 SB-4/SG-4 AK SB-2/SG-2 J r MW-1 ti MW-2 � r ALP r FIGURE 2 SOURCE: SAMPLE LOCATION MAP GOOGLE EARTH AERIAL IMAGERYE 59 DEPOT STEET ASSESMENT SERVICIES YEAR : 2017 59 DEPOT STREET WAYNESVILLE, HAYWOOD COUNTY, APPROXIMATE SCALE: NORTH CAROLINA = 60 feet TM ECS PROJECT NO. 49:16550-A Table 1 Summary of PID Readings 59 Depot Street Environmental Assessment Services 59 Depot Street Waynesville, Haywood County, North Carolina ECS Project No.: 49:16550-A Sample ID Sample Depth (ft bgs) PID Reading (ppm) S B-1 0.0-1.0 0.1 1.0-2.0 0.3 2.0-3.0 0.3 3.0-4.0 0.6 4.0-5.0 1.1 S B-2 0.0-1.0 0.0 1.0-2.0 0.1 2.0-3.0 0.7 3.0-4.0 0.2 4.0-5.0 0.9 S B-3 0.0-1.0 0.0 1.0-2.0 0.3 2.0-3.0 0.1 3.0-4.0 0.7 4.0-5.0 1.1 S B-4 0.0-1.0 1.3 1.0-2.0 7.1 2.0-3.0 7.4 3.0-4.0 12.1 4.0-5.0 9.8 SB-S 0.0-1.0 0.7 1.0-2.0 1.1 2.0-3.0 0.9 3.0-4.0 3.2 4.0-5.0 6.7 5.0-7.5 3.4 7.5-10 2.5 10-12.5 1.7 12.5-15 3.3 15-17.5 2.1 17.5-20 0.9 20.0-22.5 0.8 22.5-25.0 1.2 Notes PID = photoionization detector ppm = parts per million ft bgs = feet below the ground surface Bold intervals were selected for analysis Table 2 Summary of Soil Analytical Results 59 Depot Street Environmental Assessment Services 59 Depot Street Waynesville, Haywood County, North Carolina ECS Project No.: 49:16550-A SVOCs by EPA VOCs by EPA Method 8260 Method 8270 U O > Sample ID Sample Depth Sample Date i °��' N o v v c o ago cn 2 N (6 0 U a C N SB-1 4' to 5' 04/11/22 <0.0064 0.0083 0.24 BRL BRL S13-2 4' to 5' 0.013 <0.010 <0.0023 BRL BRL SB-3 4' to 5' <0.0052 <0.0028 <0.0026 BRL BRL S13-4 3' to 4' <0.010 <0.010 <0.0017 BRL BRL SB-5 4' to 5' <0.0038 <0.0021 <0.0019 BRL BRL Protection of Groundwater PSRGs 0.39 8.3 0.0063 -- -- Residential PSRGs 2.1 990 17 -- -- Industrial/Commercial PRSGs 8.8 9,700 82 -- -- Notes: Results presented in milligrams per kilograms (mg/kg) Targeted Compounds not shown were not detected above laboratory reporting limits PSRGs = Preliminary Soil Remediation Goals - North Carolina Department of Environmental Quality, June 2021 VOCs = Volatile Organic Compounds SVOCs = Semi -Volatile Organic Compounds Bold = Concentration exceeds Protection of Groundwater PSRG Table 3 Summary of Groundwater Analytical Results 59 Depot Street Environmental Assessment Services 59 Depot Street Waynesville, Haywood County, North Carolina ECS Project No.: 49:16550-A SVOCs by EPA VOCs by EPA Method 8260 Method 8270 U v Sample ID Sample Date o `o v U o 0 0 "� V) CU u t cn C N u E ca N ~ E: c� v MW-1 04/11/22 1.2 6.0 <1.0 BMDL BMDL MW-2 980 2030 146 BMDL BMDL MW-3 42.0 62.4 3.7 BMDL BMDL NC2LGWQS 70 0.7 3 Various Residential Groundwater VISL NS 12 1 Various Non -Residential Groundwater VISL NS 48 4.4 Various Notes: Results presented in micrograms per liter (ug/L) BMDL = Below Method Detection Limit Targeted Compounds not shown were not detected above laboratory method detection limits VOCs = Volatile Organic Compounds SVOCs = Semi -Volatile Organic Compounds NC2LGWQS = North Carolina 2L Groundwater Quality Standards Residential Groundwater VISL = NCDEQ Residential Groundwater Vapor Intrusion Screening Level (January 2022) Non -Residential Groundwater VISL = NCDEQ Non -Residential Groundwater Vapor Intrusion Screening Level (January 2022) Bold = Concentration exceeeds NC2LGWQS Light Shaded Cell = Concentration Exceeds Residential Groundwater VISL Dark Shaded Cell = Concentration Exceeds both Residential and Non -Residential Groundwater VISLs NS = No Standard TABLE 4 SUMMARY OF LEAK TESTING RESULTS 59 Depot Street Environmental Assessment Services 59 Depot Street Waynesville, Haywood County, North Carolina ECS Project No.: 49:16550-A Sample ID Helium Concentration in Shroud (%) Helium Concentration in Shroud (ppm) Helium Readings from Sample Train (ppm) 1 2 3 SG-1 3.5% 35,000 0 0 0 SG-2 3.0% 30,000 0 0 0 SG-3 3.6% 36,000 25 25 25 SG-4 4.5% 45,000 0 0 0 Notes: ppm = parts per million Tabla 5 Summary of Soil Gas Analytical Results 59 Depot Street Environmental Assessment Services 59 Depot Street Waynesville, Haywood County, North Carolina ECS Project No.: 49:16550-A llSali ali.�c aav arsy�aaas r.�yS;a� a. r.�y:�� ar.aro r. r.EFy��' ar.11S:�� �S7l�aro r.EZ.L-M� mm mjj mr,o— per ruenmeKrl­11 vel Ms4lna vei lion ozn M rvon aesieennai vapor lnnrusonxreemnr Level m14lneoorrxreriorana sub slabxreenmrLevei Dune zozn �coricamra�on anonad above ---derma vlSLnlMOLle limn