Project Number:
DNR-031a
Other Project Number:
WR85R009
Funding Year:
1985
Contract Period:
Funding Source:
DNR
Investigator(s) and affiliations:
Abstract:
Introduction: The following is a phase one site assessment prepared by the Department of Natural Resources evaluating the subsurface conditions at the intersection of Superior Street and Clifton Streets in Tomah, Wisconsin (see Appendix A: site maps).
The purpose of the assessment was to verify the existence of dissolved phase and adsorbed phase hydrocarbon which were previously detected by Layne Northwest of Pewaukee, Wisconsin, using a soil gas survey. In addition to the soil gas survey, Layne Northwest also detected dissolved phase hydrocarbons in monitoring well P-4 which is located just south of Veldey’s Mobil Station. Monitoring well P-4 was drilled in an area which showed the highest values on the original soil gas survey.
During tank excavation at Veldey’s Mobil on July 11 and 12, 1988, soil samples were taken by DNR personnel to quantify the amount of adsorbed phase hydrocarbons in the station tank pad. Soil samples showed a maximum total BTEX level of 730 ppm as determined by the State Laboratory of Hygiene in Madison.