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CAMBRIA Cambria issued a Sensitive Receptor Survey in November 1999 for the subject site Well records obtained from the California Department of Water Resources identified ten water wells within 2,000 feet of the site During August 2002 Cambria video-logged an abandoned water-supply well located at the subject site The location of this well (RW) is shown on Figure 2 The well was constructed of six inch diameter steel well casing and was screened from 107 to 115 fbg On February 14, 2003, with permission from SJCEHD, the former water supply well was properly destroyed The destruction activities are documented in Cambria's April 29, 2003 Well Destruction Report I Periodic groundwater extraction has been performed at the subject site since February 2000 Groundwater is currently extracted from well MW-1A and a UST complex backfill well (BF-1) Groundwater extracted during these events is transported via vacuum truck to the Martinez Refining Complex where it is recycled As of April 22, 2003, approximately 194,231 gallons of groundwater has been extracted through this program Calculations based on this volume and groundwater analytical data from the monitoring wells suggest approximately 5 45 pounds of TPHg, 0 102 pounds of benzene, and 515 pounds of MTBE have been recovered from beneath . the site Wells MW-1A, MW-2A, and MW-3A have been sampled on a quarterly basis since they were installed Depth to groundwater at this site has ranged from approximately 7 4 to 112 fbg The predominant groundwater flow direction is to the northeast INVESTIGATION RESULTS Personnel Present Geologist Geno Mammim directed the field activities, working under the supervision of California Registered Geologist Joe Neely Permits Cambria obtained monitoring well installation permit from SJCEHD nCalifornia License Drilling Compa y. GreggG gg In Situ of Martinez, om CS C ( 7 Li nse No 656407) Drilling Dates December 17, 2001 Drilling Method: Cone penetration test (CPT) 0813 3