Publication Summary

This progress report is one in a series describing the results of ground water sampling at Restover Truck Stop. This report describes the results of samples collected in January and July 1999 for benzene, toluene, ethylbenzene, and total xylenes (BTEX), as well as total petroleum hydrocarbons as gasoline (TPH-G). Ecology has conducted ground water sampling at this site from 1987 to the present.

This progress report is one in a series describing the results of ground water sampling at Restover Truck Stop. This report describes the results of samples collected in January and July 1999 for benzene, toluene, ethylbenzene, and total xylenes (BTEX), as well as total petroleum hydrocarbons as gasoline (TPH-G). Ecology has conducted ground water sampling at this site from 1987 to the present.

To remediate soil and ground water contamination, an Interim Action consisting of an air sparge/vapor extraction system (VES) was initiated in the summer of 1993. Operation of the VES was terminated in the fall of 1997, since BTEX concentrations had substantially decreased and continued operation of the system was no longer cost efficient. In the fall of 1998 and early 1999 the VES and most of the remaining monitoring wells were decommissioned.

Since monitoring began in 1987, BTEX concentrations have decreased substantially. Well WDOE-6A is the only well in which BTEX concentrations continue to be elevated. In January, Model Toxic Control Act (MTCA) cleanup levels were exceeded in WDOE-6A for benzene, ethylbenzene and total xylene, as well as for TPH. In July, MTCA cleanup levels were exceeded in WDOE-6A for total xylene and TPH. Benzene and toluene were not detected in well WDOE-6A in July due to high quantitation limits.

Link to EIM data for User Study ID RESTOVER