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Valley Motors - 5 kv) 27 January 2014 <br /> 800 E. Main St. <br /> Stockton, San Joaquin County <br /> Recommendations <br /> Based on available data, the Site meets the criteria for closure under the State Water Board's <br /> Low Threat Closure Policy. Remedial actions included soil vapor excavation and natural <br /> attenuation. Mass estimate was 831 pounds (126 gallons) remaining in soil in April 1998. <br /> Groundwater concentrations appear to be stable to declining. Staff,jestimates less than 1 Ib. of <br /> TPH remains in groundwater, and that WQO will be reached in less;than 40 years. Remaining <br /> Site wells were destroyed prior to case closure No Further Action Required. <br /> Attachments: <br /> Figure 1 — Site Location Map <br /> Figure 2 — Site Plan <br /> Figure 3 —Potentiometric Water Surface Map December 2013 <br /> Figure 4—TPH-g Isoconcentrations December 2013 <br /> Table 1 — Cumulative Analytical Results- Soil Concentrations <br /> Table 2—Cumulative Analytical Results —Groundwater Concentrations <br /> Table 3—Well And Borings Construction Details <br /> Table 4—Groundwater Depth to Water Data <br /> Table 5—Time to Reach WQOs <br /> q <br />