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Home My WebLink AboutWS-2805_6783_CA_RMR_20170103Active Remediation Monitoring Report Hollar’s Grocery Yadkinville, Yadkinville County, North Carolina Progress Project 1016207.001 December 30, 2016 2 B TABLE OF CONTENTS A SITE INFORMATION ................................................................................................................ 1 B TABLE OF CONTENTS ............................................................................................................. 2 C SITE HISTORY AND CHARACTERIZATION ..................................................................... 3 D FIELD ACTIVITIES .................................................................................................................... 3 E CONCLUSIONS ........................................................................................................................... 4 FIGURES Figure 1 -- Topographic Site Map Figure 2 -- Site Map Figure 3 -- Groundwater Flow Map Figure 4 -- Groundwater Analytical Results Map Figure 5 -- Benzene Isopleth Map Figure 6 -- MTBE Isopleth Map Figure 7 -- Total BTEX Isopleth Map TABLES Table B-4 -- Summary of Detected Groundwater Analytical Results Table B-7 -- Well Construction Information APPENDICES Field Data Sheets Laboratory Data Sheets and Chain-of-Custody Record Analytical History Active Remediation Monitoring Report Hollar’s Grocery Yadkinville, Yadkinville County, North Carolina Progress Project 1016207.001 December 30, 2016 3 C SITE HISTORY AND CHARACTERIZATION Progress Environmental, Inc. (Progress) was contracted by Quality Oil Company, LLC to conduct groundwater monitoring activities at the Hollar’s Grocery located at 3709 Courtney-Huntsville Road in Yadkinville, Yadkinville County, North Carolina. The site consists of an active convenience store which stores petroleum products in underground storage tanks (USTs) and an aboveground storage tank (AST) for retail sale. The site is located in a residential and agricultural area of Yadkinville. A release at the site was identified in July 1990 (approximate). The site remains a High Risk due to the presence of active water-supply wells in the vicinity. Information regarding the former on-site USTs is presented below: Table 1 Site History, UST/AST System Information Tank No. Installation Date Removal Date Capacity (gallons) Previous Contents 1 1980 1991 4,000 Gasoline 2 1977 1991 2,000 Gasoline 3 1977 1991 1,000 Kerosene 4 1977 1991 280 Diesel 5 1991 Present 6,000 Gasoline 6 1991 Present 3,000 Gasoline 7 1991 Present 3,000 Gasoline 8 Unknown Unknown 550 Gasoline Table 2 Site History, UST Owner/Operator Information Owner’s Name Address Phone Number Dates of Ownership Quality Oil Company, LLC P.O. Box 2736 Winston-Salem, NC 27102 (336) 722-3441 Unknown - 1991 Heather Whitaker 2242 Monkey Bottom Road Yadkinville, NC 27055 Unknown Unknown - Present D FIELD ACTIVITIES Progress collected groundwater samples from the monitoring and recovery wells MWA, MWB, MWN, MWQ, MWT, VERW1, VWERW2/RW3, and RW7 and water-supply well WSN on November 28, 2016. Prior to sampling the monitoring wells, the depth-to-groundwater from the top of each well casing was measured in the monitoring wells using an electric water level and oil/water interface indicator. The meter was decontaminated between uses according to the following procedure: • washed with potable water and phosphate-free detergent solution; • rinsed with potable water; and • rinsed with distilled water. Active Remediation Monitoring Report Hollar’s Grocery Yadkinville, Yadkinville County, North Carolina Progress Project 1016207.001 December 30, 2016 4 The monitoring wells were purged by bailing an equivalent of three volumes of water from the wells using a one-liter capacity disposable polypropylene bailer. The monitoring wells were then sampled using a dedicated, disposable bailer for each well. The groundwater samples were decanted into laboratory-prepared containers. The sample containers were labeled with identifying numbers and information, preserved on ice, and delivered under chain-of-custody to R&A in Kernersville, North Carolina for analysis. Laboratory Analytical Results R&A analyzed the groundwater samples for volatile organic compounds (VOCs) by Standard Method 6200B including ethanol, MTBE, and IPE. A summary of the groundwater analytical results is presented in Table B-4 and on Figure 4. Laboratory analysis of the groundwater samples collected from monitoring and recovery wells MWA and MWQ detected several petroleum-related compounds at concentrations below their respective NC2LGWQS. Laboratory analysis of the groundwater sample collected from monitoring well MWB detected benzene (1.32 µg/L), IPE (356 µg/L), and MTBE (22.7 µg/L) at concentrations that exceed their respective NC2LGWQS. Laboratory analysis of the groundwater sample collected from monitoring well MWN detected benzene (35.3 µg/L), 1,2-dichloroethane (32.6 µg/L), IPE (1,320 µg/L), and MTBE (380 µg/L) at concentrations that exceed their respective NC2LGWQS. Laboratory analysis of the groundwater sample collected from monitoring well MWT detected 1,2- dichloroethane (1.69 µg/L) at a concentration that exceeds its NC2LGWQS. Laboratory analysis of the groundwater sample collected from monitoring well VERW1 detected benzene (366 µg/L), IPE (4,050 µg/L), MTBE (2,110 µg/L), and naphthalene (65.3 µg/L) concentrations that exceed their respective NC2LGWQS. Laboratory analysis of the groundwater sample collected from monitoring well VERW2/RW3 detected 1,2-dichloroethane (0.60 µg/L) at a concentration that exceeds its NC2LGWQS. Laboratory analysis of the groundwater sample collected from recovery well RW7 detected benzene (192 µg/L), IPE (297 µg/L), and naphthalene (108 µg/L) concentrations that exceed their respective NC2LGWQS. Laboratory analysis of the groundwater samples collected from water-supply well WSN did not detect targeted compounds above the laboratory detection limit. E CONCLUSIONS Based on the results of the groundwater sampling event, Progress makes the following conclusions: Active Remediation Monitoring Report Hollar’s Grocery Yadkinville, Yadkinville County, North Carolina Progress Project 1016207.001 December 30, 2016 5 • Progress collected and analyzed groundwater samples from MWA, MWB, MWN, MWQ, MWT, VERW1, VWERW2/RW3, and RW7 and water-supply well WSN for VOCs using standard Method 6200B. • Laboratory analysis of the groundwater samples collected from monitoring and recovery wells MWA and MWQ detected several petroleum-related compounds at concentrations below their respective NC2LGWQS. • Laboratory analysis of the groundwater samples collected from monitoring and recovery wells MWB, MWN, MW-T, VERW1, VERW2/RW3, and RW7 detected targeted petroleum compounds at concentrations that exceed their respective NC2LGWQS. Based on the results of the groundwater sampling event, Progress makes the following recommendations: • Based on review of the analytical results, it appears that the detected concentrations in the groundwater samples collected from on-site monitoring wells have generally decreased at the site and targeted compounds have not been detected in the groundwater samples collected from the active, on-site water-supply well. Therefore, Progress recommends continued natural attenuation monitoring, with the utilization of remedial additives for further degradation of dissolved-phase petroleum contamination. FIGURES Figure 1 Topographic Site Map Hollar’s Grocery 3709 Courtney-Huntsville Road Yadkinville, Yadkin County, North Carolina P.O. Box 5884 Winston-Salem, NC 27113 Telephone: (336) 722-9999 Fax: (336) 722-9998 www.progressenvironmental.com United States Department of the Interior USGS 7.5 Minute Series Topographic Map Contour Interval: 10 feet Scale: 1”=2000’ Farmington, North Carolina Date: 2016 Project: Hollar’s Grocery Client: Quality Oil Co. Progress Job #: 1016207.001 Date: December 2016 SITE Site Progress Progress Progress Progress Progress Progress TABLES Well Number Sampling DateDepth to Groundwater (ft. TOC)MWA11/28/1633.95BQL BQL1.21BQL1.97BQL1.47 2.69 10.20 1.46 1.52BQL BQL42.6 19.80 1.67MWB11/28/1633.521.32BQL BQL356 0.58 22.7 0.65BQL BQL BQL3.28BQLBQL BQL BQL BQLMWN11/28/1637.6635.3 32.6BQL1,320BQL380 2.60BQL BQL BQL BQL BQL BQL BQL3.30BQLMWQ11/28/1634.40BQL BQLBQL6.00BQL0.75BQL BQL BQL BQL BQL BQL BQL BQL BQL BQLMWT11/28/1636.76BQL1.69BQL0.53BQL4.42BQL BQL BQL BQL BQL BQL BQL BQL BQL BQLVERW111/28/1633.85366BQL346 4,050 21.5 2,110 65.3BQL42.3BQL BQL BQL61.8 170 31.5 193VERW2/RW311/28/1635.220.63 0.600.84 4.73 4.22BQL5.73 0.78 1.21 0.51 7.04BQL BQL BQL BQL BQLRW7 11/28/1637.50192BQL140 297 35.6BQL108BQL18.5BQL BQL9.90 13.2BQL9.50 20.71 0.4 600 70 70 20 6 70 70 25 70 70 600 400 400 5005,000 400 84,500 70,000 25,000 20,000 6,000 6,900 30,000 11,700 8,500 70,000 260,000 28,500 25,000 85,500Notes:= Exceeds North Carolina 2L Groundwater Quality Standards (NC2LGWQS)= Exceeds Gross Contamination LevelsContaminant concentrations are reported in micrograms per liter (µg/L)NM = Not MeasuredNE = Not EstablishedNA = Not AnalyzedBQL = Below Quantitation LimitsGross Contamination LevelsContaminant of ConcernNC 2L Groundwater Quality StandardsEthylbenzeneAnalytical MethodTotal Xylenes1,2,4-Trimethylbenzene1,3,5-TrimethylbenzeneNaphthalenen-PropylbenzeneIPESM 6200BBenzeneTable B-4Summary of Detected Groundwater Analytical ResultsHollar's GroceryActive Remediation Moniotring ReportIncident Name and No.: Hollar's Grocery, 6783Styrenen-Butylbenzenesec-Butylbenzenep-Isopropyltoluene1.2-DichloroethaneMTBETolueneI-Propylbenzene Well Screened Total Depth to Relative GroundwaterMonitoring Well Installation Diameter Interval Depth to Water Elevation ElevationID Date (inches) (feet) (feet) (feet TOC) (feet TOC )* (feet)11/29/2016MWA 11/25/1991 2 20-40 40 33.95 98.79 64.84MWB 11/27/1991 2 20-40 40 33.52 97.34 63.82MWN 9/10/2003 2 25-55 55 37.66 97.16 59.50MWQ 1/16/2008 2 20-55 55 34.40 92.38 57.98MWT 1/16/2008 2 20-55 55 36.76 97.15 60.39VERW1 INP 4 INP 60 33.85 INP INPVERW2/RW3 INP 4 INP 52 35.22 INP INPRW7 12/7/2004 2 15-55 55 37.50 97.45 59.95Incident Name and No.: Hollar's Gorcery, 6783Table B-7Well Construction InformationHollar's GroceryActive Remediation Monitoring Report APPENDIX FIELD DATA SHEETS APPENDIX LABORATORY DATA SHEETS AND CHAIN-OF-CUSTODY RECORD APPENDIX ANALYTICAL HISTORY