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Quick-N-Save #2 -3- September 16, 2010 <br /> Claim No. 15567 <br /> General Site Conditions <br /> • Geology and Hydrogeology The Site is underlain by interbedded and intermixed sand, <br /> silt and clay. The depth to groundwater varies seasonally between 24 to 33 feet bgs and <br /> the groundwater gradient is southeast at approximately 0.007. No water wells have <br /> been identified within 2000 feet of the site. <br /> • Groundwater Trends: There are more than six years of groundwater monitoring data for <br /> this Site. The extent of the groundwater plume has not been defined. The trend for <br /> Benzene in the source area is shown below. <br /> BENZENE Results for MWS <br /> 140000, <br /> 120000J -- —...--• - r -— - <br /> I <br /> 100000 — ----- --- <br /> J <br /> 80000 . <br /> (=A 6000 ___- _._. _ _.-. <br /> � I <br /> 400ooi <br /> 20000+-- <br /> 0 <br /> 00001-- • -___ -- _ _._-__ <br /> 1 <br /> . BENZENE <br /> Sensitive Receptor Survey <br /> A Sensitive Receptor Survey (SRS) has not been conducted. <br /> Risk Evaluation <br /> A Human Health Risk Assessment (HHRA) has not been conducted. <br /> Recommendation <br /> The Fund concurs with the San Joaquin County LOP that active remediation should commence <br /> without delay and that the extent of contamination should be defined concurrently with active <br /> remediation. <br /> Kirk Larson, PG Date Robert Trommer, CHg Date <br /> Engineering Geologist Senior Engineering Geologist <br /> Technical Review Unit Chief, Technical Review Unit <br /> (916) 341-5816 (916) 341-5684 <br /> CaWbrnia En vironmentai Protection Agency <br /> .n <br /> �.*Xec sled Paper <br />