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DAYNE L. FR.ARY, GEOLOGIST Consulting in Geology and Environmental Science 2713 Silver Drive Bakersfield, California 93306 (805) 872-1919 Fax (805) 872-8306 August 29, 1997 San Joaquin County Environmental Health Division 304 East Weber Avenue, Third Floor Stockton, California 95202 Request for Closure for: Village West Marina @ 6649 Embarcadero Drive, Stockton (see Figure 1). Claimant: Pegasus Group, Inc., Dwight Davis, President. UST Cleanup Fund Claim No. 06962. Site Work Completed Village West Marina is a condominium complex and small craft marina property which includes the containment levee on the east side of Fourteen-Mile Slough in west Stockton. Two 10K gasoline USTs (T-1 & T-2) and one 5K diesel UST (T-3) were removed from the property by Evax Technologies, Inc. on April 21, 1992. Sail samples collected from beneath the ends of gasoline UST T-1 indicated the following analytical results in mg/Kg: • TPH-g 600, 1200 • Benzene 7.5, 11 • Toluene 63, 18 • Ethylbenzene 7.7, 17 • Xylenes 48, 170 Based on these data, further work including piping removal was directed by the SJCEHD. Samples were not collected from beneath gasoline UST T-2 or diesel UST T- 3 because the tank inverts were in contact with groundwater. Diesel UST T-3 apparently did not leak, as no significant TEH-d was ever subsequently detected. W.W. Irwin, Inc., retained by Mr. Dwight Davis in 1993, drilled hydropunches and ultimately completed five monitoring wells which are depicted on the Site Plan, Figure 2. Hydropunch sampling (HP-1 through HP-3) on April 8, 1994 yielded a groundwater sample from HP-3 containing 160 µg/L of benzene. Complying with a directive of the SJCEHS, W.W. Irwin, Inc. completed monitoring wells MW-4, MW-5, and MW-6 on June 6, 1994. Wells MW-7 and MW-8 were selected for completion following additional hydropunch sampling of HP-7 through HP-10 on July 3, 1995. The well numbers for MW-4, MW-5, and MW-6 were selected so as not to confuse data initially obtained from hydropunches HP-1, HP-2, and HP-3. MW-7 and MW-8 were initially drilled as hydropunches HP-7 and HP-8, then were completed as unimpacted definition wells.