18004_Tremont Redevelopment_Final Grade Soil Sampling Plan_10.21.2019

ONE Environmental Group of Carolina, PLLC www.oneenv.com
September 3, 2019 Joselyn Harriger North Carolina Department of Environmental Quality Division of Waste Management Brownfields Program 610 E. Center Avenue, Suite 301 Mooresville, NC 28115
Re: Final Grade Soil Sampling and Analysis Work Plan – Revised 307 W. Tremont Ave., Charlotte, NC 28203 Brownfields Project Number: 18004-14-060 Dear Ms. Harriger: ONE Environmental Group of Carolina, PLLC (ONE) is pleased to submit this Final Grade Soil
Sampling and Analysis Work Plan (Plan) to the North Carolina Department of Environmental Quality (NCDEQ) Division of Waste Management (DWM) Brownfields Program for the above-referenced site. Included in this Plan is a brief overview of the site history, a proposed scope of work, and schedule.
Site Background The site consisted of one warehouse structure formerly occupied by Virginia-Carolina Chemical Corporation. The site is understood to contain limited arsenic and lead contaminated soils associated with its former use as a fertilizer manufacturing facility. Based on the known contamination, the site entered into a Brownfields Agreement with the NCDEQ DWM Brownfields Program on October 30, 2015. The site is recognized as “Tremont Redevelopment” (Brownfields Project Number: 18004-14-060) with the identified responsible party; Exxon Mobile Environmental Services Company (EMES). Numerous assessments and excavation activities have been completed on behalf of EMES in order to delineate and remediate affected areas of the site. Currently, the site remains under redevelopment for adaptive reuse as a multi-tenant commercial structure. An anticipated date of completion and occupancy is projected as mid-October 2019. The site landscaping plans have been revised since the submittal of the site Environmental Management Plan (EMP) dated April 2018. A re-marked landscaping plan based on ONE’s site visits, visual confirmations, and correspondence with the site general contractor throughout August 2019 is provided as Attachment A. The figure illustrates disturbed areas of the site that will remain uncapped (i.e. areas not covered by an impermeable hardscape) and topped with a 3-inch layer of mulch. These areas include planted greenery along sidewalks, curbsides, and perimeters of the site.
Ms. Joselyn Harriger, PG September 3, 2019 Page 2 of 3
Final Grade Soil Sampling and Analysis ONE proposes to conduct final grade sampling within areas of the site that remain uncapped following site construction activities. This sampling event is intended to assess soils in accordance with property land use restriction (LUR) No. 7. The confirmation analyses will be conducted in accordance with the Inactive Hazardous Sites Program (IHSB) Guidelines for Assessment and Cleanup (October 2015). Soil analytical results will be screened against the May 2019 IHSB Industrial/Commercial Health Based Preliminary Soil Remediation Goals (PSRG). Lead and arsenic will be screened against the USEPA approved site-specific action levels (SSALs) of 27 milligrams per kilogram (mg/kg) and 270 mg/kg, respectively. Soil samples will be collected utilizing a hand auger. A total of six (6) composite samples from depths of 0 to 2 feet below final grade will be collected for analysis. Each composite sample will be
composed of up to six aliquots of soil collected from demarcated sample areas presented in
Attachment B. Laboratory-supplied containers will be provided by North Carolina certified laboratory, Prism Laboratories, Inc. (Prism), to ensure the collection of sufficient sample volumes, including volume for MS/MSD analyses. The six (6) composite samples will be collected into the laboratory-supplied containers and placed in a cooler on ice. The samples will be submitted under proper chain-of-custody to Prism for analysis of the following:
• Volatile organic compounds (VOCSs) by EPA Method 8260;
• Semi-volatile organic compounds (SVOCs) by EPA Method 8270; and
• RCRA metals by EPA Method 6010. A Level II quality assurance and quality control (QA/QC) will be reported by Prism. Following the completion of the soil sampling activities, borings will be backfilled with native soil to final grade and re-topped with mulch. The final grade sampling activities and analytical results will be documented by ONE and incorporated within the submission of a Redevelopment Summary Report (due within 90 days after the completion of site redevelopment). The report shall include a summary of the site work, findings, laboratory analytical report, analytical tables and figures. The report will be signed and sealed by a Professional Engineer or Geologist prior to the submittal to NCDEQ DWM.
Schedule ONE will initiate the sampling activities described herein upon completion of site landscaping activities and upon approval of this Plan. We at ONE appreciate your consideration of this Plan. Should you have any questions, please do not hesitate to contact me at [phone].

ATTACHMENTS

ATTACHMENT A:

Site Landscaping Plan

Grass
GrassGrass
Grass

ATTACHMENT B:

Proposed Sample Locations