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| Title | Restover Truck Stop Ground Water Monitoring, August and October 1995 | |||
| Month-Year Published | March 1996 | |||
| Online Availability |
1229 kilobytes, requires version 4.0 or later of Adobe Acrobat Reader Software get Acrobat Reader
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| Short Description |
This document is one in a series describing the results of ground water sampling at Restover Truck Stop. Ecology has conducted ground water sampling at the site from 1987 to the present. To remediate soil and ground water contamination a vapor extraction system (VES) was constructed in the summer of 1993. The VES has been operating since February 1994. To help determine the effectiveness of the cleanup, ground water monitoring was expanded from semiannual to quarterly sampling in the fall of 1993. This technical document describes the results of samples collected in August and October 1995. (Also see abstract below) | |||
| Publication Number | 96-312 | |||
| Author(s) | Marti, P. | |||
| Print Availability | ||||
| Number of pages | 62 pp. | |||
| Keywords | ammonia, best management practice, creek, Ground Water, ground water monitoring, groundwater, hydrocarbons, laboratory, model, Model Toxic Control Act, monitoring, nitrogen, nonpoint, petroleum, point source, soil, toxic, vapor, water, water quality, watershed, wells | |||
| Subject Waterbodies |
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| Abstract | Long Description |
This document is one in a series describing the results of ground water sampling at Restover Truck Stop. Ecology has conducted ground water sampling at the site from 1987 to the present. To remediate soil and ground water contamination a vapor extraction system (VES) was constructed in the summer of 1993. The VES has been operating since February 1994. To help determine the effectiveness of the cleanup, ground water monitoring was expanded from semiannual to quarterly sampling in the fall of 1993. This technical document describes the results of samples collected in August and October 1995. In August, samples were collected from eight monitoring wells and the Restover water supply well. In October, three monitoring wells were sampled. All collected samples were analyzed for benzene, toluene, ethylbenzene, and total xylenes (BTEX), and total petroleum hydrocarbons as gasoline (TPH-G). Overall, BTEX concentrations in the upper aquifer have decreased substantially since 1989. Concentration decreases are probably due to a combination of plume spreading, dispersion, biodegradation and reduction of source loading. From August 1991 to November 1994, concentrations were relatively stable. Since November 1994, concentrations appear to have decreased. BTEX concentrations continue to be elevated in well WDOE-6A. BTEX has not been detected in MW-8A in the last four sample rounds. In August, Model Toxic Control Act (MTCA) cleanup levels were exceeded in MW-20A for benzene. In both August and October, cleanup levels were exceeded for benzene, ethylbenzene, and total xylene in WDOE-6A and for TPH in both WDOE-6A and MW-8A. Data review and laboratory reporting sheets are presented in Appendix A. |
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