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Soil Assessment Report <br /> 324 East 11th Street <br /> Tracy, California <br /> October 12,2017 <br /> LTCP EVALUATION <br /> Pangea offers this evaluation of general and media-specific criteria of the State Water Resources Control <br /> Board's Low-Threat Closure Policy (LTCP). Our evaluation of general LTCP criteria is presented below <br /> in Table A. <br /> Table A - General LTCP Case Criteria Evaluation <br /> Satisfy Criteria Discussion <br /> Criteria? <br /> L <br /> ✓ Located in service area of a The site is located in an area serviced by the City of Tracy. <br /> public water system <br /> V/ Release consists only of Only petroleum hydrocarbons have been identified at this site. <br /> petroleum. <br /> ✓ Release has been stopped A truck/auto station was present at the site from the 1950s until 1973. In <br /> 1973, a permit was obtained to demolish the station and remove six <br /> USTs.While no documents were found to confirming the removal of the <br /> USTs, geophysical survey utilizing ground penetrating radar (GPR), <br /> electromagnetic utility locating techniques, and a metal detector did not <br /> identify any USTs but did identify a potential 20-ft long underground <br /> pipe anomaly near the potential former tank location. <br /> ✓ Free product has been There is no history of free product encountered at this site. <br /> removed <br /> ✓ A conceptual site model Key components of a Conceptual Site Model(CSM) are included in this <br /> has been developed report and past reports. This report includes a water well survey based <br /> on Geotracker GAMA data. The hydrocarbon extent in soil and <br /> groundwater has been adequately characterized by soil and groundwater <br /> sampling from borings. <br /> ✓ Secondary Source has been No significant secondary source has been identified. <br /> removed <br /> ✓ Soil or groundwater has No MTBE has been detected in site soil or groundwater. <br /> been tested for MTBE <br /> ✓ Nuisance does not exist at The site is currently used as an office building. Pangea is not aware of <br /> the site nuisance conditions pertaining to the subsurface residual hydrocarbon <br /> impact. <br /> 6 <br />