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ti <br /> 'Lenna'Shockley - 4 - August 15,`2011 <br /> TOr�nETftOLEVM Nv6RO-0N91TPN1 A3 OIEeEL FUEL ITPN97 R—s 11rMWB <br /> 33 - <br /> 41 011 <br /> eoaoo r <br /> _ 1 <br /> –�rarw �r�evw n.o.ocv.enr+s tr+rs or¢acrvei[rP+�e.-,r...w <br /> Risk Evaluation <br /> No human health risk assessment is noted in Geotracker. There are no water supply wells or <br /> -surface water receptors present within 2,000 feet of the Site. <br /> Recommendation - <br /> June 2008, free product is likely present in the vicinity of MW-1 and MW-4. The Fund <br /> recommends that the San Joaquin County LOP direct the Responsible Party to assess remedial <br /> techniques that will identify remaining sources of free phase petroleum and recover it to the <br /> extent feasible. The Fund will review this site next year to track progress. <br /> UPDATED, June 2009, the Responsible Party has proposed several remedial technologies to <br /> achieve Water Quality Objectives. The Fund recommends that a remedial plan be selected and <br /> active remediation should begin without delay. The Fund will review this site next year to track <br /> progress. <br /> UPDATED, July 2010, the Responsible Party submitted a Soil Vapor Extraction Feasibility <br /> Testing Work Plan on 12 July 2010. Since the principal contaminant of concern at this site is <br /> diesel,fuel, which has relatively low volatility, the Fund questions the viability of soil vapor <br /> extraction and recommends that the San Joaquin County LOP direct the Responsible Party to <br /> select+an alternate remedial technology. The Fund will review this site next year to track <br /> progress. <br /> UPDATED, August 2011, the Fund recommends that the San Joaquin County LOP direct the <br /> Respd"nsible Party to begin active remediation by a technology proven to reduce the mass of <br /> heavy hydrocarbons (TPHd). <br /> Kirk Larson, P.G. Date Robert Trommer, C.H.G. Date <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5663 (916) 341-5684 <br />