The URL can be used to link to this page

Home My WebLink About21031 Ideal Tool WP_Approval 20180109 State of North Carolina | Environmental Quality | Waste Management 1646 Mail Service Center | 217 West Jones Street | Raleigh, NC 27699-1646 919 707 8200 T January 9, 2018 Sent Via E-mail Ralph McGee, P.G. Hart & Hickman 2923 south Tryon Street, Suite 100 Charlotte, North Carolina 28203 Subject: Work Plan Approval Ideal Tool & Die Company Charlotte, Mecklenburg County Brownfields Project No. 21031-17-060 Dear Mr. McGee, The Department of Environmental Quality (DEQ) Brownfields Program received the Brownfield Assessment Work Plan dated November 1, 2017 (Work Plan) for the above referenced Brownfields Property. Please include a receptor survey update in your final report. DEQ Brownfields approves the Work Plan. Please be advised that this approval from DEQ Brownfields does not waive any applicable requirement to obtain any necessary permits, licenses or certifications which may be required from other state or local entities. If you have questions about this correspondence or require additional information, please feel free to contact me by phone at 704-661-0330 or by email at carolyn.minnich@ncdenr.gov. Sincerely, Carolyn Minnich Carolyn Minnich Brownfields Project Manager cc: Nikolaus Matthias Lischerong <nick@le-h.com> North Carolina Department of Environmental Quality Division of Waste Management Brownfields Program Site: Address: City: County: Brownfields Project Number: Property and Building Characteristics a. Provide occupancy and use information. c. Describe the foundation construction. Include details on type, floor construction, and depth below grade. e. Are any subslab ventilation systems or moisture barriers in place? If so, please provide details. Surface Conditions Size of Property (acres) % of property that is wooded/brush If an existing building is on-site, please respond to the following. Information can be provided on additional sheets as needed. If numerous buildings are on-site, consult with your PM as only information on specific buildings may be needed. b. Describe the construction of the builidng including materials (e.g. wood frame, block), type and size of openings (e.g. windows, bay doors), and height (number of stories). % of property that is covered by buildings NA BROWNFIELDS PROPERTY RECEPTOR SURVEY This form was created to clarify and simplify preparing a receptor survey for a brownfield site. Please provide the information requested below. Distances are measured from the site property boundary unless otherwise indicated by the DEQ Brownfield’s Project Manager (PM). Current Usage Proposed Usage d. Describe the HVAC system in the building. Include available details on type, equipment location, source of air return, and design considerations (e.g. positive pressure?). % of property that is grassed areas % of property that is agricultural crops % of property that is paved Rev. 09/2015 Page 1 of 3 North Carolina Department of Environmental Quality Division of Waste Management Brownfields Program Surrounding Property Land Use North South East West Utilities Is there a septic system on-site? (Y or N) _________ Please provide the utility providers for the subject property a. Natural Gas ___________________________ b. Sewer ___________________________ c. Electricity ___________________________ d. Other __________________________ For surrounding properties, please complete the following table with available information. * If yes, please provide a map or detailed information (distance, direction, depth) of the utility in correlation with the subject property. Is a water line main within 100 ft of Property boundary? Is a natural gas line main within 100 ft of the Property boundary? Is a buried telephone/ cable main within 100 ft of the Property boundary? Direction Is there a basement within 1,000 ft of the Property Is a septic system leach field within 500 ft of the Property boundary? Distance (ft)Address Zoning/Land Use Proposed Usage Current Use/Occupant Please provide information on the following land uses in the vicinity of the subject site, including a map of the surrounding areas. If specific receptors are present, please provide addresses of the facilities. For the subject property, please provide a map of known buried utilites. If available, include depth to top, construction material, and diameter of the utilities. In addition, please provide the following information on utilty providers. If additional assessment is required, the public utility locators should be contacted. This information can then be added to a site map. Y/N * Is a school or daycare center within 1,000 ft of the Property? Specific Land Uses of Interest Y/N * * If numerous facilities of interest are present, their locations can be placed on a map in lieu of providing specific addresses. Distance (ft)DirectionUtility/Potential Receptor Is a buried electrical cable main within 100 ft of Property boundary? Is a storm water pipe within 100 ft of the Property boundary? Is a sanitary sewer within 100 ft of the Property boundary? Is there a residence within 1,000 ft of the Property? Rev. 09/2015 Page 2 of 3 North Carolina Department of Environmental Quality Division of Waste Management Brownfields Program Water Supply What is the potable water supply for the property? Public ______ Private ______ Surface Water & Wetlands If Private, please provide details of the water supply source (i.e. well location, well construction, etc). If public, please include the water providers name. Distance (ft)Direction Address Provide Information regarding Surface Water and Wetlands Y/NWater Supply Wells Please provide the following information regarding water supply wells in the vicinity of the Property. At a minimum, a windshield survey within 1,500 ft of the property boundaries should be completed to determine if water supply or irrigation wells may be present. Information from applicable databases can and should be utilized; however, should not be utilized in lieu of the windshield survey. If multiple wells are present within the requested radius, please provide a map of the well locations. If needed, please attach a separate table to list all wells. Please note, the PM may opt for a more extensive water supply well survey if needed. The purpose of this section is to provide information on the water supply for the site and surrounding areas. a. Is the water body naturally developed or man-made? Is a public water supply well within 1 mile of the Property boundary? Is a private water supply well within 1,500 ft of the Property bd?Is an irrigation well within 1,500 ft of the Property boundary? Response/Comments The purpose of this section is to provide information on the presence of surface waters and/or wetlands on, or in the vicinity of the Property. b. List the uses of the water body. c. What is the source of the water for the water body? d. What is the nature of the bottom of the water body (e.g., rocky or concrete bottom, drainage ways or impoundments) If no on-site surface water features, what is the nearest surface water body? Are there any wetlands present on the property? If no wetlands on-site, are wetlands suspected on adjoining properties? Are there surface water features on the property? (If yes, please complete a. to d.) Rev. 09/2015 Page 3 of 3 Via Email November 1, 2017 LEH NC Bank Street, LLC 310 Arlington Avenue, Suite 402 Charlotte, North Carolina 28203 Attn: Mr. Nick Lischerong Re: Brownfields Assessment Work Plan Ideal Tool & Die Company Charlotte, North Carolina Brownfields Project ID# 21031-17-060 H&H Project No. LEH-001 Dear Nick: 1.0 Introduction Per your request, Hart & Hickman, PC (H&H) has prepared this work plan to conduct Brownfields assessment activities at the former Ideal Tool & Die Brownfields property located at 3021 and 3029 Bank Street in Charlotte, Mecklenburg County, North Carolina (Site or subject Site). A Site location map is provided as Figure 1. The property is comprised of two contiguous parcels totaling approximately 0.5 acres of land developed with two light industrial warehouse buildings. Between 1957 and 1974, the Site buildings were utilized for fabric and rug manufacturing, heating and air conditioning sales and repair, metal finishing, and warehousing. In 1974, Ideal Tool & Die Company began operations in the facility which included machining, tooling, die casting, and molding activities. Ideal Tool & Die Company operations ceased in 2017 and the building is currently unoccupied. Mr. Nick Lischerong November 1, 2017 Page 2 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc The Site received a letter of eligibility for entry into the North Carolina Department of Environmental Quality (DEQ) Brownfields Program on July 13, 2017 (Brownfields Project No. 21031-17-060). Preliminary Site redevelopment plans indicate that the exiting Site buildings will be renovated to include multi-tenant commercial businesses. On September 19, 2017, a kick-off meeting was held with DEQ Brownfields personnel to discuss historical uses at the Site, previous assessment activities, and data gaps associated with current conditions at the Site in preparation for the proposed redevelopment. This work plan describes proposed assessment activities to address data gaps identified during the September 2017 kick-off meeting. A summary of previous assessment activities completed at the Site is provided in Section 2.0, and the proposed Brownfields soil assessment and vapor intrusion assessment activities are provided in Section 3.0. 2.0 Background In April 2017 HRP Associates, Inc (HRP) completed a Phase I Environmental Site Assessment (ESA) report for the Site, and in May 2017 HRP completed Phase II ESA activities at the Site. A brief summary of the Phase I and II ESA findings is provided below. Based on review of the April 2017 HRP Phase I ESA, the following Recognized Environmental Conditions (RECs) were identified in connection with the Site:  historical use of oils and coolants associated with tooling and die fabrication and metal finishing at the Site  the potential for impact from the Piedmont Heat Treating facility located adjacent and topographically upgradient of the Site  the potential for impact from the Soft Touch Auto Appearance Center located adjacent and topographically upgradient of the Site Mr. Nick Lischerong November 1, 2017 Page 3 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc In May 2017, HRP conducted Phase II ESA soil and groundwater assessment activities at the Site to evaluate subsurface conditions for potential impacts associated with the identified RECs. The assessment activities included collection of five (5) soil samples from seven (7) soil boring locations and three (3) groundwater samples in areas of potential concern at the Site. The soil and groundwater samples were submitted for laboratory analysis of volatile organic compounds (VOCs) by EPA Method 8260, semi-VOCs (SVOCs) by EPA Method 8270, polychlorinated biphenyls (PCBs) by EPA Method 8082, and Priority Pollutant List (PPL) metals by EPA Method 6010/7471. Laboratory analytical results for the soil samples indicated that trace levels of the VOCs acetone (up to 0.409 J mg/kg) and toluene (up to 0.0078 mg/kg) were detected in all five soil samples. Additionally, trace levels of methylene chloride (up to 0.0067 J mg/kg) were detected in two of the five soil samples at concentrations well below the DEQ Inactive Hazardous Site Branch (IHSB) Preliminary Soil Remediation Goals (PSRGs). HRP inaccurately reports a toluene detection in soil sample SB-4 as 7.8 milligrams per kilogram (mg/kg) which exceeds the DEQ IHSB PSRG for the Protection of Groundwater of 5.5 mg/kg. However, the toluene concentration in the laboratory analytical report is reported as 7.8 micrograms per kilogram (µg/kg) or 0.0078 mg/kg. A conversion from micrograms per kilogram to milligrams per kilogram is needed for comparison to the IHSB PSRG of 5.5 mg/kg. No VOC concentrations detected in soil samples collected during HRP Phase II ESA activities exceed the IHSB PSRGs. No SVOCs or PCBs were detected above the laboratory reporting limits in any of the soil samples. Several metals were detected above the laboratory reporting limits in all five soil samples. However, the metals concentrations appear to be consistent with naturally occurring levels in North Carolina soil. Based on results of the HRP soil assessment, no potential soil impacts at the Site have been identified. Mr. Nick Lischerong November 1, 2017 Page 4 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc Laboratory analytical results for the three groundwater samples collected during Phase II ESA activities indicate that several VOCs were detected above the laboratory reporting limits in all three samples. Of the compounds detected, low levels of tetrachloroethene (PCE) (up to 8.5 µg/L) and trichloroethene (TCE) (up to 13.0 µg/L) were detected above the North Carolina (NC) 2L Groundwater Standard of 0.7 µg/L and 3 µg/L, respectively in all three samples. The TCE concentrations also exceed the DEQ Division of Waste Management (DWM) Non-Residential Groundwater Vapor Intrusion Screening Level (GWSL) of 4.35 µg/L in all three groundwater samples. 1,2-Dichloropropane (up to 1.3 µg/L) was detected at concentrations exceeding the NC 2L Groundwater Standard of 0.6 µg/L in two of the three groundwater samples (TMW-4 and TWM-7) and carbon tetrachloride (12.0 µg/L) was detected above the NC 2L Groundwater Standard of 0.3 µg/L and the DWM Residential GWSL of 4.15 µg/L in one of the three groundwater samples (TMW-7). HRP inaccurately reports that no SVOC concentrations were detected in the groundwater samples. However, several SVOCs were detected above the laboratory method detection limit, but below the laboratory reporting limit and are estimated “J-flag” concentrations. Of the SVOCs detected in the groundwater samples, benzo(a)anthracene (0.86 J µg/L) was detected at a concentration exceeding the NC 2L Groundwater Standard of 0.05 µg/L in one of the three groundwater samples (TMW-4). No other SVOC concentrations exceeded groundwater screening levels. No PCBs were detected above laboratory reporting limits in any groundwater sample. Several metals were detected in all three groundwater samples at concentrations above laboratory reporting limits. Of the metals detected, iron (up to 5,450 µg/L) was detected at concentrations exceeding the NC 2L Groundwater Standard of 300 µg/L in all three samples. Chromium (12.8 µg/L) was detected in TWM-4 at a concentration slightly exceeding the 2L Standard of 10 µg/L. According to information provided on the HRP groundwater sampling forms, turbidity was not measured during the sampling process. Visual observations of the water recorded by the HRP sampling personnel indicate that turbidity ranged from “heavy” to “low”. Mr. Nick Lischerong November 1, 2017 Page 5 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc Turbidity measurements exceeding 10 nephelometric turbidity units (NTUs) can significantly increase metals concentrations in groundwater samples. Because turbidity was not measured during the sampling process, it is difficult to definitively determine whether metal impacts reported in groundwater by HRP are a significant concern at the Site. Based on review of the preliminary Site redevelopment plan, soft-scape landscaping is proposed near the western Site boundary along Bank Street. As previously noted, no soil impacts were identified in this portion of the Site during the HRP Phase II ESA activities. However, the HRP Phase II ESA soil samples were collected from deeper depths and surficial soil conditions where landscaping is proposed is unknown. In addition, VOCs were detected in Site groundwater at concentrations exceeding the DEQ DWM GWSLs, but no vapor intrusion assessments have been completed at the Site. This work plan describes proposed shallow soil assessment activities at the Site in areas where proposed landscaping will be installed as part of the proposed redevelopment, and proposed vapor intrusion assessment activities inside the Site buildings to evaluate the potential for structural vapor intrusion from low level chlorinated solvent impacts identified in Site groundwater. The proposed scope of work for Brownfields assessment activities is summarized in Section 3.0 below. 3.0 Brownfields Assessment Scope of Work The proposed Brownfields assessment activities will be performed in general accordance with DEQ’s IHSB Guidelines for Assessment and Cleanup (Guidelines) dated October 2015, DEQ’s DMW Vapor Intrusion Guidance dated April 2014, and most recent versions of the U.S. Environmental Protection Agency (EPA) Region IV Science and Ecosystem Support (SESD) Field Branches Quality System and Technical Procedures guidance. Prior to conducting the field activities, H&H will contact North Carolina 811, the public utility Mr. Nick Lischerong November 1, 2017 Page 6 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc locator, to mark subsurface utilities located on the Site. H&H will also team with a private utility contractor to screen for utilities at the Site and inside the Site buildings which may not be identified by the public utility locator. Additionally, each soil boring will be hand cleared to approximately 5 feet (ft) below the ground surface (bgs) to further screen for the presence of subsurface utilities. 3.1 Soil Assessment Activities H&H proposes to conduct soil assessment activities in the locations of planned curb-side landscaping areas along Bank Street and in the grassy area along Foster Avenue. Previous soil samples collected at the Site by others were from deeper depth intervals than would not be representative of soil disturbed during installation of the proposed green areas along Bank Street and the proposed paved areas on Foster Avenue. The proposed soil sample locations (denoted by SB nomenclature) are depicted on Figure 2, and will be collected in the following locations:  Soil samples SB-1 through SB-3 will be collected from shallow soil near the Site boundary along Bank Street; and  Soil sample SB-4 will be collected from shallow soil in the grassy area located southwest of the Site buildings along Foster Avenue. Soil sample locations on the northwestern side of the Site building (Bank Street side) are located in asphalt or concrete covered parking areas. Prior to advancing the soil borings in these locations, H&H will utilize a concrete coring machine, hammer drill, or similar tool to penetrate the impervious cover to access underlying soil. Each proposed soil boring will be advanced to a depth of approximately 5 ft bgs utilizing a decontaminated stainless steel hand auger. During boring advancement, continuous soil samples will be collected from the center of the hand auger bucket. Soil samples will be inspected for the presence of visual and olfactory indication of impact, and screened for the presence of volatile organic vapors with a calibrated photoionization detector (PID). Based upon results of field screening, one soil sample will be Mr. Nick Lischerong November 1, 2017 Page 7 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc collected from each soil boring for laboratory analysis from shallow soil (1-2 ft or 2-3 ft bgs). Following sample collection, the soil samples will be placed directly into dedicated laboratory- supplied sample containers, labeled with the sample identification, date, and requested analysis, and placed in a laboratory supplied cooler with ice. The samples will be delivered to a North Carolina certified laboratory under standard chain of custody protocols for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, PCBs by EPA Method 8082, and Resource Conservation and Recovery Act (RCRA) metals plus hexavalent chromium by EPA Methods 6020/7471/7196. In addition, H&H will collect soil samples for PCB Congeners by EPA Method 1668, and request that the laboratory hold the samples pending analytical results for samples analyzed for PCBs by EPA Method 8082. If PCBs are detected at concentrations exceeding the high risk PSRG in soil samples using EPA Method 8082, H&H will contact DEQ to discuss analyzing that sample for congener-specific analysis. To evaluate the reproducibility of the sample results, H&H will collect one duplicate soil sample from the proposed samples that will be submitted for analysis of VOCs by EPA Method 8260, SVOCs by EPA Method 8270, PCBs by EPA Method 8082, and RCRA metals plus hexavalent chromium by EPA Method 6020/7471/7196. Please refer to Section 3.4 below for additional laboratory quality assurance/quality control procedures and reporting limit information. Following sampling activities, the soil sample borings will be properly abandoned and the surfaces will be repaired similar to pre-drilling conditions. Additionally, the soil sample locations will be estimated using a sub-meter global positioning system (GPS) unit. 3.2 Vapor Intrusion Assessment Activities Results of analysis of previous groundwater samples collected at the Site by others indicate that trichloroethene (TCE) concentrations were detected above the DEQ DWM Non-Residential GWSLs. To evaluate the potential for structural vapor intrusion into the existing Site buildings, Mr. Nick Lischerong November 1, 2017 Page 8 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc H&H proposes to collect five concurrent and co-located sub-slab vapor and indoor air samples inside the Ideal Tool & Die Site buildings. The proposed co-located sub-slab and indoor air sample locations (denoted by SSV and IAQ nomenclature, respectively) are depicted on Figure 2, and include the following areas:  Building 1 - northwestern portion of the northern Site building (SSV-1/IAQ-1)  Building 1 - eastern portion of the northern Site building (SSV-2/IAQ-2)  Building 1 - southern portion of the northern Site building (SSV-3/IAQ-3)  Building 2 - northern portion of the southern Site building (SSV-4/IAQ-4)  Building 2 - southern portion of the southern Site building (SSV-5/IAQ-5) In addition, one exterior background air sample will be collected from an upwind location outside of the Site buildings during the indoor air sampling event. The location of the outdoor background sample will be determined on the day of the sampling based upon the prevailing wind direction on that day. One duplicate sub-slab vapor sample and one duplicate indoor air sample will also be collected from one of the proposed interior locations. 3.2.1 Sub-Slab Vapor Point Installation H&H will drill through the concrete floor at each sample location using a rotary hammer drill and 1-inch diameter drill bit to advance a bore hole through the concrete slab. The borings will be advanced to approximately 4 inches beneath the slab into the underlying soil to penetrate potential vapor barriers beneath the concrete slab. A dedicated AMS gas vapor tip connected to Teflon tubing that extends to the surface will be seated in the base of the boring. A sand filter pack will then be placed from the base of boring to base of the concrete slab to cover the gas vapor tip. The sample points will be completed by placing a hydrated bentonite seal from the top of the sand filter pack to the surface. Mr. Nick Lischerong November 1, 2017 Page 9 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc Following installation and prior to collection of the sub-slab vapor samples, a leak check will be conducted at each sample location by constructing a shroud around the sampling point and flooding the air within the shroud with helium gas. Helium concentrations inside the shroud will be measured using a helium gas detector. Using a syringe and three-way valve, the Teflon tubing and surrounding sand pack will be purged of approximately three volumes. Following purging, a sample will be collected from the sample tubing outside the shroud and analyzed using the helium gas detector to ensure that helium concentrations are less than 10% of the helium concentrations in the shroud. Following a successful leak check, a laboratory-supplied 6-liter stainless steel Summa sample canister connected to in-line flow controllers with a vacuum gauge. The flow controller will be connected to the sample tubing at each sampling point using a brass nut and ferrule assembly to form an air-tight seal. The flow regulator will be pre-set by the laboratory to regulate the vapor intake rate to 6-liters per hour. Once the sample train is assembled, the intake valve on the canister will be fully opened to begin collection of the SSV sample. Vacuum readings on the Summa canister will be recorded prior to and following the one-hour sampling period to ensure adequate sample volume was collected. A vacuum will be maintained within the canisters at the conclusion of the sampling event. After sample collection, the Summa canister’s valve will be closed, and the regulator will be disconnected from the canister. The canisters will be placed in laboratory supplied shipping containers, properly labeled and shipped under standard chain-of-custody protocols to a qualified laboratory for analysis of VOCs by EPA Method TO-15. The laboratory will be requested to use reporting limits that are below DEQ DWM Non-Residential Vapor Intrusion Sub-slab and Exterior Soil Gas Screening Levels (SGSLs). Upon completion of sampling activities, each SSV boring will be abandoned and the surfaces were repaired similar to pre-drilling conditions. Each SSV location will be estimated by measuring from known benchmarks (e.g. doorways, walls, etc.). Mr. Nick Lischerong November 1, 2017 Page 10 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc 3.2.2 Indoor Air Sampling Methodology In order to collect the indoor air samples under conservative conditions, the samples will be collected with the windows of the buildings closed and ingress and egress activities minimized. Because the Site buildings are unoccupied, it is anticipated that the samples will be collected while the HVAC systems are off. The background and indoor air samples will be collected using 6-liter stainless steel Summa sample canisters connected to in-line flow controllers with a vacuum gauge. The flow controllers will be set so that the samples are collected over an 8-hour period. A 3-foot long sampling cane will be connected to the flow controller so that the sample intake point is positioned approximately 5 ft above grade (typical breathing zone height) when the sample canister is set on its base. During the sampling activities, indoor/outdoor air pressure differential will be measured near the start, middle, and end of the 8-hour sampling period using a manometer sensitive to 0.001 inches of water. In addition, exterior wind speed, exterior wind direction, indoor/outdoor temperature, and precipitation (if any) will be recorded near the start, middle, and end of the sampling period. For quality assurance purposes, H&H personnel will be on-Site monitoring the sample canisters to prevent tampering or damages for the duration of the sampling event. A vacuum will be maintained within the canisters at the conclusion of the sampling event. Prior to and after the indoor and background air samples are collected, vacuum in the canisters will be measured using a laboratory-supplied vacuum gauge and recorded by sampling personnel. The starting and ending vacuum in each canister will be recorded on the sample chain-of-custody. The sample canisters will then be labeled and shipped under standard chain- of-custody procedures to a qualified laboratory for analysis of VOCs by EPA Method TO-15. The laboratory will be requested to use reporting limits that are below DEQ DWM Non- Residential Vapor Intrusion Indoor Air Screening Levels (IASLs). Mr. Nick Lischerong November 1, 2017 Page 11 S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\BF Assessment Work Plan\Ideal Tool & Die Co (BPN 21031-17-060)_Brownfields Assessment Work Plan_20171101.doc Prior to issuance of the laboratory analytical report documenting results of the proposed vapor intrusion assessment activities, the laboratory will be instructed to review laboratory analytical results for the sub-slab vapor samples and identify compounds detected above the laboratory reporting limits. To evaluate the potential for a completed vapor intrusion pathway into the Site buildings, only those compounds detected above laboratory reporting limits in sub-slab vapor will be reported for the indoor air samples. 3.3 Quality Assurance – Quality Control Non-dedicated equipment and tools will be decontaminated prior to use at each boring or sampling location, or following exposure to soil or groundwater. Laboratory QA/QC procedures will be employed to ensure appropriate sample handling and analysis and to aid in the review and validation of the analytical data. QA/QC procedures will be conducted in accordance with the method protocols and will include regular equipment maintenance, equipment calibrations, and adherence to specific sample custody and data management procedures. Samples will be analyzed in conjunction with appropriate blanks, laboratory duplicates, continuing calibration standards, surrogate standards, and matrix spiking standards in accordance with approved methodologies to monitor both instrument and analyst performance. Laboratory reporting limits for each analyte will be at or below appropriate screening criteria, where possible. Additionally, H&H will request that the laboratory include estimated concentrations for compounds that are detected at levels above the laboratory method detection limit but below the laboratory reporting limit. A hard-copy of the laboratory analytical data report and QA package for each group of samples submitted to and analyzed by the subcontracted laboratory will be provided in an appendix to the final report. Laboratory QA data consistent with Level II documentation will be requested for this project. A copy of the completed chain-of-custody record and shipping receipt will be appended to the corresponding laboratory analytical report included with the final report. 0 2000 4000 APPROXIMATE SCALE IN FEET N U.S.G.S. QUADRANGLE MAP QUADRANGLE 7.5 MINUTE SERIES (TOPOGRAPHIC) CHARLOTTE WEST, NORTH CAROLINA 1996 TITLE PROJECT SITE LOCATION MAP FORMER IDEAL TOOL & DIE 3021 & 3029 BANK STREET CHARLOTTE, NORTH CAROLINA DATE: JOB NO: REVISION NO: FIGURE: 10-13-17 0 1LEH-001 SITE REVISION NO. 0 JOB NO. LEH-001 DATE: 10-13-17 FIGURE NO. 1 FORMER IDEAL TOOL & DIE 3021 & 3029 BANK STREET CHARLOTTE, NORTH CAROLINA PROPOSED SOIL & VAPOR SAMPLE LOCATION MAP LEGEND SITE PROPERTY BOUNDARY ADJACENT PARCEL BOUNDARY PROPOSED SOIL BORING LOCATION PROPOSED SUB-SLAB VAPOR/ INDOOR AIR SAMPLE LOCATION 2923 South Tryon Street-Suite 100 Charlotte, North Carolina 28203 704-586-0007(p) 704-586-0373(f) License # C-1269 / #C-245 Geology F O S T E R A V E N U E BUILDING 1 (3021 BANK STREET)BANK STREETSB-1 SB-2 SB-3 SB-4 SSV-1/ IAQ-1 SSV-2/ IAQ-2 SSV-3/ IAQ-3 SSV-5/ IAQ-5 SSV-4/ IAQ-4 BUILDING 2 (3029 BANK STREET)S:\AAA-Master Projects\Lischerong Enterprises and Holdings (LEH)\Ideal Tool & Dyeing - Banks Street\Figures\Proposed Sample Location Map.dwg, FIG 1, 10/26/2017 5:58:06 PM