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J r ne ooutniana t or oration ai i u i nornton Hoar Stockton CA April 4 1995 <br /> RECOMMENDATIONS <br /> Groundwater Technology recommends site closure for the referenced site based on <br /> Q Separate-phase hydrocarbons have been removed from the on-site groundwater <br /> monitoring wells in the source area <br /> 0 Sod confirmation samples did not contain detectable levels of TPH and benzene Soil <br /> vapor samples contain no detectable benzene The highest TPHg concentrations in <br /> air sample are under 74 pgA <br /> 11 Analytical results from groundwater sampling indicate levels of hydrocarbon <br /> constituents have been at or below California action levels for drinking water since <br /> 1989 <br /> o The surface at the site is capped by uninterrupted asphalt paving, limiting percolation <br /> from precipitation into the underlying sod <br /> Groundwater Technology requests that the SJCPHS approve closure, and recommend closure to the <br /> CRWQCB-CVR <br /> Upon approval of site closure, Groundwater Technology will proceed with the abandonment of the on- <br /> site and off-site monitoring wells in accordance with SJCPHS requirements <br /> ATTACHMENTS <br /> 1 Figures <br /> 2 Tables <br /> 3 Bibliography <br />