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Home My WebLink About22004-Witherspoon Nursery-Final Grade Soil Assessment Work Plan_Witherspoon Nursery Westhart hickman SMARTER ENVIRONMENTAL SOLUTIONS Via Email February 3, 2024 NCDEQ — Division of Waste Management Brownfields Redevelopment Section 1646 Mail Service Center Raleigh, NC 27699-1646 Attn: Ms. Joselyn Harriger Re: Final Grade Soil Assessment Work Plan — Witherspoon Nursery West Witherspoon Nursery 3312 Watkins Road Durham, North Carolina Brownfields Project No. 22004-18-032 H&H Job No. CRP-003 Dear Joselyn: On behalf of Crowne at 501, Limited Partnership, please find the enclosed Final Grade Soil Assessment Work Plan prepared for the Witherspoon Nursery Brownfields property located in Durham, Durham County, North Carolina. Should you have questions or need additional information prior to providing approval, please do not hesitate to contact us at (919) 847-4241. Sincerely, Hart & Hickman, PC Justin Ballard, PG Project Manager Enclosure Colin Carraway, PG Assistant Project Geologist cc: Ms. Tracy Fowlkes, Crowne Partners, Inc. (via email) Ms. Andrea Haines, Crowne Partners, Inc. (via email) 2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301 Charlotte, NC 28203 Raleigh, NC 27607 704.586.0007 main 919.847.4241 main www.harthickman.com Final Grade Soil Assessment - Witherspoon Nursery West Work Plan Witherspoon Nursery 3312 Watkins Road Durham, Durham County, North Carolina Brownfields Project No. 22004-18-032 t mop '"� zlkwl wl 2/3/2024 February 3, 2024 H&H Job No. CRP-003 Ll hart � hickman SMARTER ENVIRONMENTAL SOLUTIONS #C-1269 Engineering #C-245 Geology 2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301 CharlmerNC 28203 Raleigh, NC 27607 www.harthirkman.com 704.586.0007 main 919_847A241 main Final Grade Soil Assessment Work Plan — Witherspoon Nursery West Witherspoon Nursery 3312 Watkins Road Durham, North Carolina Brownfields Project No. 22004-18-032 H&H Job No. CRP-003 Table of Contents 1.0 Introduction............................................................................................................................1 2.0 Site Background Information............................................................................................... 2 3.0 Final Grade Soil Assessment Activities................................................................................ 3 3.1 Final Grade Soil Sampling................................................................................................... 3 3.2 Quality Assurance / Quality Control.................................................................................... 4 3.3 Investigation Derived Waste................................................................................................ 5 3.4 Reporting.............................................................................................................................. 5 List of Tables Table 1 Final Grade Soil Sample Summary List of Figures Figure 1 Site Location Map Figure 2 Proposed Final Grade Soil Sample Location Map I https:Hharthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners inc - crp/crp- 003 brownfields assistance/final grade/work plan/final/final grade soil assessment work plan_witherspoon nursery west.docx 41 hart hickman SMARTER ENVIRONMENTAL 50LUFIOM Final Grade Soil Assessment Work Plan — Witherspoon Nursery West Witherspoon Nursery 3312 Watkins Road Durham, North Carolina Brownfields Project No. 22004-18-032 H&H Job No. CRP-003 1.0 Introduction On behalf of Crowne at 501, Limited Partnership (Crowne at 501), Hart & Hickman, PC (H&H) has prepared this Final Grade Soil Assessment Work Plan (Work Plan) for the Witherspoon Nursery Brownfields property (Brownfields Project No. 22004-18-032). The Brownfields property totals approximately 8.0 acres on two parcels of land and is located at 3312 and 3330 Watkins Road in Durham, Durham County, North Carolina (Site or subject Site). The Prospective Developer (PD) sold 3.7 acres of the Brownfields Site (i.e., the western parcel, Durham County Parcel ID No. [PIN] 0800216336) to Crowne at 501 (hereinafter referred to as the Witherspoon Nursery West property at 3312 Watkins Road), and the PD retained the eastern 4.3 acres of the Brownfields Site (Durham County PIN 0800218361, hereinafter referred to as the Witherspoon Nursery East property at 3330 Watkins Road). A Site location map is provided as Figure 1. In accordance with the North Carolina Department of Environmental Quality (DEQ) approved Environmental Management Plan (EMP) dated April 24, 2019 and revised May 27, 2020, final grade soil sampling is required to be conducted at the Site upon the completion of soil disturbance activities (i.e., following completion of utility installations and final grading). Therefore, in accordance with the DEQ-approved EMP, H&H will collect final grade soil samples from areas at the Witherspoon Nursery West parcel that are not covered by building foundations, sidewalks, driveways, parking areas, or other impervious materials. A brief summary of background information of the Witherspoon Nursery Site is presented in Section 2.0, and the final grade soil assessment scope of work is described in Section 3.0. https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Crowne Partners Inc - CRP/CRP-003 1 1 a rt 1 1 iL ma 1 1 Brownfields Assistance/Final Grade/Work Plan/Final/Final Grade Soil Assessment Work Plan_ Witherspoon Nursery West.docx P. wA6rm £NVIRDN MENTAL SOLUTIONS 2.0 Site Background Information From the mid-1970s until the mid-2010s, Witherspoon Rose Culture Inc. conducted plant nursery operations at the Site. Former Site operations included selling gardening supplies, cultivation of plants, and storage of agricultural products that contained pesticides and herbicides. From 2015 through 2018, environmental investigations were conducted by ATC Associates of North Carolina, P.C. (ATC) and Terracon Consultants, Inc. (Terracon) to assess areas of potential environmental concerns related to these operations. Areas of potential environmental concern included septic systems and associated drain fields, an irrigation pond, three aboveground storage tanks (ASTs) previously utilized for diesel fuel and heating oil, and the historic usage of pesticides and herbicides on the Site. In 2019, H&H completed soil (Witherspoon Nursery West property) and surface water and sediment (from the irrigation pond on the Witherspoon Nursery East property) assessment activities at the Site under the purview of the DEQ Brownfields Redevelopment Section. Laboratory analytical results indicated arsenic (up to 3.02 mg/kg) was detected at a concentration slightly above the DEQ Industrial/Commercial Preliminary Soil Remediation Goal (PSRG) in the soil sample collected in the west -central portion of the Witherspoon Nursery West property. The arsenic is attributed to naturally occurring arsenic in the soil. No other compounds were detected above Residential or Industrial/Commercial PSRGs in the soil samples collected from the Witherspoon Nursery West property. As previously mentioned, requirements of the DEQ-approved EMP include the collection of final grade soil samples upon completion of soil disturbance activities. These activities have been completed at the Witherspoon Nursery West parcel and as such, this Work Plan has been prepared to fulfill the requirements of the EMP. The following sections describe the proposed final grade sampling activities. 2 https://harthick.shmepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners me - crp/crp- 003 brownfields assistance/final grade/work plan/final/final grade soil assessment work plan_witherspoon nursery west.docx 40 hart hickman 5mA6fER ENVIRONMENTAL SOLUTIOM 3.0 Final Grade Soil Assessment Activities 3.1 Final Grade Soil Sampling Final grade soil sampling activities will be completed at the Witherspoon Nursery West parcel to evaluate the potential for impacts in shallow soil within landscaped areas that may pose unacceptable exposure risks to current and future residential occupants. The soil sampling activities will be performed in general accordance with the DEQ Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup of Contaminated Sites (Guidelines) dated September 2023, and the most recent versions of the U.S. Environmental Protection Agency (EPA) Region IV Laboratory Services and Applied Science Division (LSASD) Field Branches Quality System and Technical Procedures guidance. Based on review of the Site Plan and Site reconnaissance with Crowne at 501, landscaped areas at the Site have been divided into six (6) final grade evaluation areas (EA-1 through EA-6). Up to five (5) shallow soil borings will be advanced within each final grade evaluation area for the collection of aliquot soil samples. The proposed final grade evaluation areas and aliquot soil boring locations are shown in Figure 2. Each aliquot soil boring will be advanced from the surface to approximately 2 feet below ground surface (ft bgs) using a decontaminated stainless steel hand auger. Continuous soil samples will be collected from the center of the hand auger bucket at each boring. Soil samples will be described for lithologic purposes, observed for obvious evidence of staining and unusual odors, and field screened for the presence of volatile organic vapors using a calibrated photoionization detector (PID). The aliquot soil samples from each evaluation area will be homogenized to form a composite soil sample representative of each evaluation area for a total of six (6) composite final grade soil samples. Soil samples selected for laboratory analysis will be collected directly into laboratory supplied glassware, 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 the analyses outlined below. 3 https://harthick.shmepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners me - crp/crp- hart 'Nish ick ma 1 1 003 brownfields assistance/final grade/work plan/final/final grade soil assessment work plan_witherspoon nursery west.docx SMARTER ENVIRONMENTAL SOLU71OW Composite soil samples will be submitted for laboratory analysis of semi -volatile organic compounds (SVOCs) by EPA Method 8270, Resource Conservation and Recovery Act (RCRA) metals by EPA Methods 6020/7471, and organochlorine pesticides (OCPs) by EPA method 8081. In addition, one grab sample will be collected from an undisturbed portion of the aliquot soil sample exhibiting the highest likelihood for impact from each of the final grade evaluation areas for a total of six (6) grab soil samples. If field screening results do not identify the obvious presence of impacts in an aliquot soil sample, the grab samples will be collected from the 1 to 2 ft bgs sample interval from a randomly selected aliquot soil boring in each evaluation area. The grab soil samples will be submitted for analysis of volatile organic compounds (VOCs) by EPA Method 8260. A final grade soil sample summary is provided as Table 1. Following sampling activities, the soil 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 hand-held global positioning system (GPS) unit. 3.2 Quality Assurance / Quality Control Non -dedicated equipment and tools will be decontaminated prior to use at each boring location. To evaluate the reproducibility of the sample results, H&H will collect one duplicate final grade soil sample that will be submitted for the same analyses as the parent soil sample. Laboratory Quality Assurance / Quality Control (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. H&H will request that laboratory method detection limits for each analyte be at or below appropriate screening criteria, where possible. Additionally, H&H will request that the laboratory 4 https://harthick.shmepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners me - crp/crp- hart 'Nish ick ma 1 1 003 brownfields assistance/final grade/work plan/final/final grade soil assessment work plan_witherspoon nursery west.docx SMARTER ENVIRONMENTAL SCUMOM include estimated concentrations for compounds that are detected at levels above the laboratory method detection limit, but below the laboratory reporting limit (J flags). The laboratory analytical data report and QA package for the final grade soil 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. 3.3 Investigation Derived Waste Investigation derived waste (IDW) generated during the assessment activities will be thin spread on - Site. However, if significant impacts are suspected (i.e., elevated PID readings, presence of free - product, etc.) the soil cuttings will be containerized in 55-gallon drums and staged on -Site pending analytical results of a composite IDW sample. Based on laboratory analytical results of IDW samples, the drums will be transported off -Site to a suitable facility for disposal. IDW generated during the proposed assessment activities will be managed in accordance with DEQ IHSB Guidelines. 3.4 Reporting Following completion of the assessment activities and receipt of the analytical data, H&H will document the findings in a Final Grade Soil Assessment Report. The report will include a description of the sampling activities, a figure depicting sample locations, soil boring logs, a discussion of the data in comparison to regulatory screening levels, laboratory analytical data reports, and conclusions and recommendations concerning our activities. 5 https://harthick.shmepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners me - crp/crp- 003 brownfields assistance/final grade/work plan/final/final grade soil assessment work plan_witherspoon nursery west.docx 40 hart hickman 5mA6fER ENVIRONMENTAL SOLU71OM Table 1 Final Grade Soil Sample Summary — Witherspoon Nursery West Witherspoon Nursery Durham, North Carolina Brownfields Project No. 22004-18-032 H&H Job No. CRP-003 Sample Objective Sample ID Aliquot Soil Borings Sample Depth (ft bgs) VOCs (8260) SVOCS (8270) RCRA Metals (6020/7471) Organochlorine Pesticides 8081 Shallow Soil EA-1 through Exposure Risk EA-6 5 0-2 X (Grab) X X X Evaluation QA/QC EA-DUP-1 5 0-2 X (Grab) X X X Notes: U.S. Environmental Protection Agency analytical method is shown in parentheses. VOCs = Volatile Organic Compounds; SVOCs = Semi-VOCs; RCRA = Resource Conservation and Recovery Act ft bgs = feet below the ground surface; QA/QC = Quality Assurance / Quality Control https://harthick.shmepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/crowne partners inc - crp/crp-003 brownfields assistance/final grade/work plan/table 1 - sample summary.docx 40 hart hickman wmrm ENVIRONMENTAL SOLUFIOM � f � � � �� : � �� '■ \ - �� ■ ~ . . _ � j \@ p, � Y .1 • _2� _ _ �� , ��?{ - ! - - \` .� � � ■ _ -- ( �0 _ URN ..Smas — MY APPROXIMATE o mm Gm SCALE IN FED U.S.G.S.QUADRANGLE MAP SOUTHWEST DURHAM, NORTH CAROLNA 2002 QUADRANGLE 7.5 MINUTE SERIES (TOPOGRAPHIC) • '01111(lip 114% At CHIPOTLE MEXICAN GRILL140p �! (3219 WATKINS ROAD) . ! f 1 . ;•. AOIL i �"now, 1 "e _I 3a 4=4W UM s--Zp _ � e 4 C nit ! ► A 3 A - - D B ti 6 1 MEDICAL OFFICES (5324 MCFARLAND DRIVE) B C E �a � D t A c \i" SPRING HILL 41* SUITES � (6310 E WITHERSPOON MCFARLAND 1- NURSERY WES4E k DRIVE) U t z O r = A FA� A " �E- ^ ", E ; _n 4 *,& wh "m em *ft *% �1 0 ow- #, HOME 2 SUITES (3305 WATKINS ROAD) im�.mft, INTREX COMPUTERS (3604 WITHERSPOON BLVD) ,l 1 DNEMAIN FINANCIAL [1 WITHERSPOON BL LEGEND SITE PROPERTY BOUNDARY BROWNFIELDS SITE INTERNAL PARCEL LINE PARCEL LINE PAD -MOUNTED TRANSFORMER 0 LANDSCAPED AREA O COMPOSITE SAMPLE IDENTIFICATION NUMBER • SOIL SAMPLE ALIQUOT COMPOSITE SAMPLE AREA BIFURCATION LINE NOTES: '� - -� 1. AERIAL OBTAINED FROM BING IMAGE SERVICES. AVAIL VAPOR 2. TEMPORARY MONITORING WELL, SOIL BORING, AND SAMPLE (3515 WITHERSPOON BLVD) LOCATIONS WERE OBTAINED BY H&H VIA GPS ON 1/3/19. 11 1 t PEONY ASIAN BISTRO lei (3515 WITHERSPOON BLVD) l APPROXIMATE 0 100 200 SALONCENTRIC ! • (3519 WITHERSPOON BLVD) SCALE IN FEET PROPOSED FINAL GRADE SOIL SAMPLE z " T LOCATION MAP PROJECT WITHERSPOON NURSERY BROWNFIELDS PROJECT NO. 22004-18-032 3312 AND 3330 WATKINS ROAD DURHAM, DURHAM COUNTY, NORTH CAROLINA ® 3921 Sunset Ridge Road, Suite 301 hart ^• h i c k m a n Raleigh, North Carolina 27607 . 919-847-4241(p) 919-847-4261(1} SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geology 1 NAILS AND SPA DATE: 12-18-23 REVISION NO. 0 (3603 WITHERSPOON BLVD) MJOB NO. CRP-003 FIGURE NO. 2