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�ONCL�T�SIONS Soil contamination is present beneath the old fuel dispensing islands. This contamination consists of concentrations of TPH and BTE&X above the maximum contaminant levels. Applied Consultants has ' estimated that over 1, 000 cubic yards of contaminated soil exists in the subsurface (Figure 5 A&B) . This contamination extends from the surface down to the ground-water table and is presently an active source of ground-water contamination. ' The full limits of the soil contaminant plume has not been determined. A plot of the TPH and Benzene concentrations, figures 3 and 4 , illustrates at least two separate ground-water contaminant plumes beneath the subject site. One contaminant plume in the area of ' monitoring well MW6 and one contaminant plume centering around MWI. However, given the location of MWI, the historic ground-water gradient vector, and the location of a known source of ' contamination, Applied Consultants feels that there may be two contaminant plumes in this area. The full limits of the ground-water contaminant plumes have not ' been determined. RECONMENDATIONS In order to determine the limits of the ground-water contaminant ' plume, Applied Consultants recommends that seven additional monitoring wells be established on and adjacent to the subject site (Figure 6) . ' Applied Consultants also recommends that a ground-water recovery system and a vapor recovery system be established on the subject site. The ground water recovery system will prevent the further ' migration of the ground-water contaminants and the vapor recovery system will remediate the hydrocarbon contaminated soil. ' A cost proposal to establish seven additional monitoring wells and to install a vapor extraction system will follow under a separate cover. _ 1 1 U-HAUL%7701 N WILSON WAY NUB-93-M/U HAUL QM4 (Sb5020 2) ' 14 JUNE 1993 6