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Home My WebLink AboutCenco_Annual Monitoring Report (Dec 2000)-OCRANNUAL GROUNDWATER MONITORING REPORT HONBARRIER INC. FACILITY CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA GROUNDWATER INCIDENT NO. 8440 Prepared For: Honbarrier, Inc. Post Office Box 7072 High Point, North Carolina 27263 Prepared by: Mid-Atlantic Associates, P.A. Post Office Box 669004 Charlotte, North Carolina 28266-9004 January 10, 2001 ANNUAL GROUNDWATER MONITORING REPORT HONBARRIER, INC. FACILITY CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA GROUNDWATER INCIDENT NO. 8440 January 10, 2001 Mid-Atlantic Job No. OOC0227 .00 Prepared For: Prepared By: Honbarrier, Inc. MID-ATLANTIC ASSOCIATES, P.A. Post Office Box 7027 High Point, North Carolina 27263 John D. Reuscher, P.G. Senior Environmental Geologist Thomas A. Proctor, P.G. Principal Environmental Geologist TABLE Of CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 FIELD ACTIVITIES................................................................................... 1 3.0 GROUNDWATER FLOW (DECEMBER 2000) ............................................... 1 4.0 ANALYTICAL RESULTS........................................................................... 2 5.0 CONCLUSIONS AND RECOMMENDATIONS ................................................. 2 DRAWINGS Drawing 1.1 Site Topographic Map Drawing 2. 1 Estimated Water Table Contour Map, December 2000 Drawing 4.1 Water Table VOC Plume Map, December 2000 TABLES Table 2.1 Table 2.2 Table 4.1 APPENDICES Physical Characteristics of Monitoring Wells Summary of Groundwater fjefd Parameters Summary of Chemical Constituents Detected in Groundwater Appendix A Laboratory Report and Chain of Custody, June 2000 Appendix B Laboratory Report and Chain of Custody, December 2000 1.0 INTRODUCTION Mid-Atlantic Associates, P.A. (Mid-Atlantic) is pleased to present this report summarizing the semi-annual groundwater sampling activities conducted at the Honbarrier, Inc. (Honbarrier) facility located at 600 Melynda Road in Charlotte, North Carolina (Drawing 1 .1). Groundwater .sampling was conducted according to the requirements of the North Carolina Department of Environment and Natural Resources (NCDENR), Division of Water Quality (DWQ) in correspondence dated May 3, 1999 and entitled, Recommended Site Activities. The sampling events were conducted in June and December 2000. 2.0 FIELD ACTIVITIES Mid-Atlantic mobilized to the site on June 27, 2000 and December 11, 2000 to conduct the groundwater sampling activities. The seven monitoring weJJs sampJed during these semi-annual events included MW-2, MW-6, MW-7, MW-13, MW-16, MW-18, and MW-19 (Drawing 2.1). Prior to purging the wells of at least three volumes of water using new disposable bailers, Mid-Atlantic measured the depth to water in each well using a decontaminated electric water JeveJ indicator. A new pair of protective, non-reactive gloves was donned at each well prior to collecting water level measurements. The measured depths were subtracted from the casing elevations to determine the groundwater elevation relative to Mean Sea Level. The physical characteristics of the site monitoring weJls and December 2000 groundwater elevation data are summarized in Table 2.1. After purging the wells, water samples were collected from the same bailers used to purge each well and decanted into laboratory- supplied containers. The containers were placed into an ice-filled cooler and transported .under proper chain-of-custody to Pace Analytical Services, Inc. of Huntersville, North Carolina. At the laboratory, the seven groundwater samples were analyzed for volatile organic compounds (VOCs) in accordance with SW-846 Method 8260. Jn addition, groundwater field measurements were collected for pH, electrical conductivity, temperature, and dissolved oxygen. The December 2000 measured field parameters are summarized in Table 2.2. 3.0 GROUNDWATER FLOW (DECEMBER 2000} Groundwater flow direction in the surficial aquifer was estimated based on water level data obtained from the monitoring weJls on December 11, 2000 (Drawing 2. l). Interpretation of the relative water table elevations suggests that groundwater flows generally to the south across the site. This flow direction is consistent with previously interpr-eted flow determinations. Annual Groundwater Monitoring Report Honbarrier, Inc. Facility Charlotte, North Carolina 4.0 ANALYTICAL RESULTS January 10, 2001 Page 2 The laboratory analytical results for the groundwater samples collected in June 2000 and December 2000 are contained in Appendix A and Appendix 84 respectively, and summarized in Table 4.1. As summarized, groundwater samples collected from monitoring wells MW-6 and MW-18 in June and December did not exhibit VOCs in concentrations at or above the laboratory Practical Ouantitation Limits (POLs). No VOCs were detected in the groundwater samples coHected from MW-16 in concentrations which exceeded established North Carolina Groundwater Quality Standards (NCGQS). In addition, no VOCs were detected in the water sample collected from MW-19 in December in concentrations above NCGOS. Several VOCs were detected during June and December in the groundwater samples collected from monitoring wells MW-2, MW-7, MW-13, and MW-19 (June only) in concentrations which exceeded their respective NCGWS (Table 4.1 ). These VOCs included cis-1,2-dichloroethene (cis-1,2-DCEJ, trichloroethene (TCEL vinyl chloride, benzene, chlorobenzene, tetrachloroethene (PCE), 1 ,4-dichlorobenzene, and 1 , 1- dichloroethene (1, 1-DCE). A water table VOC plume map, showing total detectable VOCs, is provided as Drawing 4. 1 5.0 CONCLUSIONS AND RECOMMENDATIONS Based on measurements made in the field and laboratory analytical results Mid- Atlantic offers the following conclusions and recommendations. • Shallow groundwater flow is directed toward the south across the site. • The water samples collected from monitoring wells MW-6 and MW-18 did not exhibit concentrations of VOCs at or above the POLs. No VOCs were detected in the groundwater samples collected from MW-16 and MW-19 {December only) in concentrations which exceeded established NCGOS. • Groundwater samples collected from monitoring wells MW-2, MW-7, MW- 13J and MW-19 {June only) exhibited concentrations of VOCs which exceeded established NCGQS. Benzene, chlorobenzene, 1 ,4- dichlorobenzene, 1, 1-DCE, cis-1,2-DCE, TCE, PCE, and vinyl chloride were detected at concentrations above their respective NCGOS. • Based on the information presented above, Mid-Atlantic recommends collecting groundwater samples from off-site monitoring well MW-19 on a semi-annual basis. Additionally, we recommend collecting groundwater samples from the six remaining on-site wells on an annual basis. The next groundwater sampling event should be conducted in June 2001. DRAWINGS TABLES APPENDIX A LABORATORY REPORT AND CHAIN Of CUSTODY JUNE 2000 APPENDIX B LABORATORY REPORT AND CHAIN OF CUSTODY DECEMBER 2000