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Home My WebLink About25046_Harrelson Ford Final Grade WP_20240708Hanley Environmental, PLLC 323 Manning Drive Charlotte, North Carolina 28209 NC Engineering License P-2407 T: (704) 317-6970 www.hanleyenvironmental.com FINAL GRADE SOIL SAMPLING WORK PLAN Harrelson Ford Brownfields Property 6500 South Boulevard Charlotte, Mecklenburg County, North Carolina Brownfields Project No. 25046-21-060 Project Number: PJ23030 Revision 1 June 21, 2024 Prepared for: Tri Pointe Homes Holdings, Inc. Final Grade Soil Sampling Work Plan Harrelson Ford Brownfields Property i TABLE OF CONTENTS TABLE OF CONTENTS i 1.0 INTRODUCTION 1 2.0 SCOPE OF WORK 1 2.1 Final Grade Soil Sampling Procedures 2 2.2 Quality Assurance/Quality Control 3 2.3 Investigation-Derived Waste 3 2.4 Reporting 3 List of Figures Figure 1 Site Location Map Figure 2 Site Map Figure 3 Proposed Final Grade Sampling Location Map List of Tables Table 1 Proposed Final Grade Soil Sample Summary Final Grade Soil Sampling Work Plan Harrelson Ford Brownfields Property 1 1.0 INTRODUCTION This Final Grade Soil Sampling Work Plan (Work Plan) presents the procedures and methodology to conduct final grade soil sampling and analyses at the Harrelson Ford Brownfields Site located at 6500 South Boulevard, Charlotte, North Carolina (the site). The site consists of one parcel (Parcel ID 17304204) with a total area of approximately 10.58 acres. A map depicting the site vicinity is included as Figure 1, and a site map is provided as Figure 2. The site is undergoing redevelopment under the North Carolina Department of Environmental Quality (NCDEQ) Brownfields Redevelopment Section (BRS) (Brownfields Project No. 25046-21-060). Current redevelopment plans for the site include construction of 165 residential townhomes within 26 buildings and associated amenities. A Notice of Brownfields Property was filed on October 13, 2023, that included a Brownfields Agreement for the site. Land Use Restriction 12.j generally indicates representative final grade soil sampling, pursuant to a plan approved in writing by NCDEQ, of areas not covered by building foundations, sidewalks, asphaltic or concrete parking areas and driveways, or two feet of documented clean fill material must be conducted prior to use of the site. Site redevelopment activities are being conducted in accordance with the NCDEQ-approved Environmental Management Plan (EMP) dated October 20, 2023. The following sections present a scope of work for final grade soil sampling including sampling and analysis procedures, quality assurance/quality control (QA/QC) procedures, investigation-derived waste (IDW) management, and reporting requirements pursuant to the Brownfields Agreement and EMP. 2.0 SCOPE OF WORK The scope of work includes sampling of soil from areas not covered by building foundations, sidewalks, impervious parking areas and driveways or two feet of documented clean fill material to evaluate potential direct exposure risks to future occupants. Soil sampling will be conducted in general accordance with sampling procedures outlined in the most recent Final Grade Soil Sampling Work Plan Harrelson Ford Brownfields Property 2 versions of NCDEQ Inactive Hazardous Site Branch’s (HSB) Guidelines for Assessment and Cleanup of Contaminated Sites, the Environmental Protection Agency (EPA) Region IV Quality System and Technical Procedures for Laboratory Services and Applied Science Division guidance, and the NCDEQ-approved EMP dated October 20, 2023. 2.1 Final Grade Soil Sampling Procedures Final grade sampling locations were divided into sampling zones corresponding with each townhome building and unpaved common areas (FG-1 through FG-29) as shown in Figure 3. The sampling zones were selected to include one soil aliquot in the backyard of each townhome unit and representative coverage of unpaved common areas located in the northern, southern, and eastern portions of the site. Buildings containing five townhomes or fewer will be associated with one sampling zone, and buildings containing more than five townhomes will be divided into two sampling zones. Within each final grade sampling zone, up to five soil aliquots will be collected from the ground surface to approximately two feet below the ground surface (ft bgs). The soil aliquots from each zone will be homogenized to form one composite sample per zone. Soil will be collected using a stainless steel, decontaminated hand auger. Field personnel will observe the collected soil for indications of staining or unusual odors and record soil lithology. A portion of the collected soil will be screened with a calibrated photoionization detector (PID). One soil aliquot location associated with each composite sample that exhibits the highest potential for impact based on field screening will be submitted as an undisturbed grab sample for analysis of volatile organic compounds (VOCs) by EPA Method 8260. The undisturbed grab sample for VOCs will be submitted from the one to two ft bgs interval. Soil aliquots will be homogenized to form one composite soil sample per zone for analysis of semi-volatile organic compounds (SVOCs) by EPA Method 8270 and Resource Conservation and Recovery Act (RCRA) metals including hexavalent chromium by EPA Methods 6020/7471/7199. Proposed final grade soil sampling is summarized in Table 1. Samples will Final Grade Soil Sampling Work Plan Harrelson Ford Brownfields Property 3 be collected in laboratory supplied containers and placed on ice following collection. The samples will be transported to a North Carolina certified laboratory under standard chain- of-custody procedures. Following sample collection, the soil boring locations will be properly abandoned and soil boring location coordinates will be recorded using a global positioning system (GPS) handheld unit. 2.2 Quality Assurance/Quality Control For QA/QC purposes, duplicate soil samples will be collected for laboratory analyses described in Section 2.1. Duplicate soil samples will be collected on a frequency of one per 20 samples, and one duplicate per sampling event. Sufficient sample volume will be supplied for MS/MSD analyses. The analytical laboratory will be instructed to report J-flag concentrations and will be requested to report results to laboratory method detection limits below the NCDEQ DWM Residential PSRGs. The laboratory will also be requested to provide a Level II QA/QC data package. 2.3 Investigation-Derived Waste It is anticipated that soil cuttings generated during the final grade sampling activities will be thin spread on-Site. If significant impacts are encountered during sampling activities, impacted soil will be containerized in a 55-gallon drum pending analytical results and managed in accordance with the EMP. 2.4 Reporting Following receipt of analytical results, a brief letter report will be prepared documenting sampling procedures, analytical results, and conclusions. The report will include a summary table of soil lithology with field screening results, a map depicting sample locations, laboratory analytical reports, a summary table of detected constituents compared to Final Grade Soil Sampling Work Plan Harrelson Ford Brownfields Property 4 applicable screening levels, and risk calculator results. The report will be certified by a North Carolina Professional Engineer or Professional Geologist. Buildings will not be occupied until approval is provided by NCDEQ based on final grade sampling data. FIGURES 1 01/25/2024 PJ23030 NAH 0 Figure No.Date Project No. Drawn By Revision No. Title and Project Notes: 1. Topographic image obtained from United States Geological Services i(USGS) online interface managed by the USGS National Geospatial Program (NGP) on August 22, 2023. HANLEY ENVIRONMENTAL, PLLC323 MANNING DRIVECHARLOTTE, NORTH CAROLINANC LICENSE P-2407 Site Location Map Harrelson Ford Brownfields Property Brownfields Project Number 25046-21-060 6500 South Boulevard Charlotte, North Carolina Legend W E S N 1,000 2,000 FTSubject Property Boundary Cit y o f C h a r l o t t e B l u e l i n e ( L i g h t R a i l ) Old P i n e v i l l e R o a d No r f o l k - S o u t h e r n R a i l w a y So u t h B o u l e v a r d 2 01/25/2024 PJ23030 JCG 0 Figure No.Date Project No. Drawn By Revision No. Title and Project HANLEY ENVIRONMENTAL, PLLC323 MANNING DRIVECHARLOTTE, NORTH CAROLINANC LICENSE P-2407 Legend Notes: 1.Aerial image obtained from Mecklenburg County Birdseye View dated January 2, 2024.W E S N 60 ft30 ft Subject Property Boundary Site Map Harrelson Ford Brownfields Property Brownfields Project Number 25046-21-060 6500 South Boulevard Charlotte, North Carolina PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PL PLPLPLPLPL PL PL PL PL PL PL PL PL PL PL X X X X X X X XXXXXXX X XXXXXXXXXXX BLDG #21 BLDG #20 BLDG #19 BLDG #18 BLDG #17 BLDG #15 BLDG #14 BLDG #11 BLDG #10 BLDG #7 BLDG #12 BLDG #9 BLDG #8 BLDG #25 BLDG #26 BLDG #6 BLDG #5 BLDG #4 BLDG #3 BLDG #2 BLDG #1 BLDG #22 BLDG #23 BLDG #24 BLDG #16 BLDG #13 3 04/01/24 PJ23030 NAH 0 Figure No.Date Project No. Drawn By Revision No. Title and Project HANLEY ENVIRONMENTAL, PLLC323 MANNING DRIVECHARLOTTE, NORTH CAROLINANC LICENSE P-2407 Proposed Final Grade Sampling Location Map Harrelson Ford Brownfields Property Brownfields Project Number 25046-21-060 6500 South Boulevard Charlotte, North Carolina Legend Notes: 1.Plan background provided by Land Development dated May 17, 2023. W E S N 60 ft30 ft PL Subject Property Boundary Soil Aliquot Location Legend Notes 1.Plan background provided by LandDesign, Inc. dated February 9, 2024. 2.Green shading indicates pervious surface. FG-1 FG-2B FG-2A FG-3B FG-3A FG-4B FG-4A FG-5B FG-5A FG-6 FG-9A FG-10A FG-13 FG-14A FG-14B FG-10B FG-17BFG-17A FG-18B FG-15 FG-11B FG-18A FG-16 FG-20A FG-12 FG-11A FG-19BFG-19A FG-20B FG-21 FG-22B FG-22A FG-23B FG-23A FG-24B FG-24A FG-25B FG-25A FG-26 FG-8A FG-8B FG-7BFG-7A FG-28 FG-27 FG-9B Final Grade Sampling Zone FG-29 TABLE Table 1 Proposed Final Grade Soil Sample Summary Harrelson Ford Brownfields Property Brownfields Project Number 25046-21-060 Location Final Grade Sampling Zone Number of Soil Aliquots in Sampling Zone VOCs by EPA Method 8260 SVOCs by EPA Method 8270 RCRA Metals by EPA Methods 6020/7471 Hexavalent Chromium by EPA Method 7199 Building 1 FG-1 4 X X X X FG-2A 3 X X X X FG-2B 4 X X X X FG-3A 3 X X X X FG-3B 4 X X X X FG-4A 3 X X X X FG-4B 4 X X X X FG-5A 3 X X X X FG-5B 3 X X X X Building 6 FG-6 4 X X X X FG-7A 3 X X X X FG-7B 3 X X X X FG-8A 3 X X X X FG-8B 3 X X X X FG-9A 3 X X X X FG-9B 3 X X X X FG-10A 3 X X X X FG-10B 3 X X X X FG-11A 3 X X X X FG-11B 3 X X X X Building 12 FG-12 5 X X X X Building 13 FG-13 4 X X X X FG-14A 3 X X X X FG-14B 3 X X X X Building 15 FG-15 5 X X X X Building 16 FG-16 4 X X X X FG-17A 5 X X X X FG-17B 4 X X X X FG-18A 4 X X X X FG-18B 4 X X X X FG-19A 3 X X X X FG-19B 4 X X X X FG-20A 3 X X X X FG-20B 3 X X X X Building 21 FG-21 5 X X X X FG-22A 4 X X X X FG-22B 5 X X X X FG-23A 4 X X X X FG-23B 5 X X X X FG-24A 4 X X X X FG-24B 5 X X X X FG-25A 5 X X X X FG-25B 5 X X X X Building 26 FG-26 5 X X X X North Common Area FG-27 5 X X X X South Common Area FG-28 5 X X X X East Common Area FG-29 5 X X X X Building 24 Building 25 Building 11 Building 17 Building 18 Building 19 Building 20 Building 22 Building 23 Building 14 Building 10 Building 9 Building 8 Building 5 Building 7 Building 3 Building 4 Building 2 Page 1 of 1