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Ultramar <br /> Ultramar,Inc. Telecopy: 209-585-5685 Credit <br /> P.O.Box 466 209-583-3330 Administfative. <br /> 525 W.Third Street 209-583-3302.Information Services <br /> Hanford,CA 93232-0466 209-583-3358 Accounting <br /> i (209)582-0241 <br /> v, �a���xx,qua;<�Z;�,`z •�. r,.,,, <br /> DATE REPORT SUBMITTED: February 9, 1999 <br /> QUARTER ENDING: December 31, 1-998 <br /> SERVICE STATION NO.: 641 <br /> ADDRESS: 1210 East Hammer Lane, Stockton, California <br /> COUNTY: San Joaquin <br /> ULTRAMAR CONTACT: Joseph A. Aldridge TEL. NO: 559-583-3231 <br /> BACKGROUND: <br /> In June 1996, the underground storage tanks were removed and replaced with double-wall <br /> tank systems. Soil samples collected from beneath the former tank locations contained <br /> -K, petroleum hydrocarbons. <br /> Five groundwater monitoring wells; one air-sparge well; and eight vapor extraction wells were <br /> installed in 1996 and 1997. The monitoring wells have been sampled quarterly since October <br /> 1997: <br /> SUMMARY.OF THIS_QUARTER'S ACTIVITIES: <br /> .Groundwater monitoring was conducted by Doulos Environmental on December 30, 1998. <br /> RESULT OF QUARTERLY MONITORING: <br /> Benzene and MTBE,were Bete t d .in groundwater samples collected from the UST area and <br /> rte y.i <br /> the off-site monitor ng well. <br /> PROPOSED,ACTIVITY FOR NEXT QUARTER: ESTIMATED COMPLETION DATE <br /> _ March 1999 <br /> Perform quarterly groundwater monitoring <br /> Submit a Workplan for,Further GrOundwater:ASSessment:­­� `� March 1999 <br /> BEACON <br /> #1 Quality and Service <br /> A Member-of the Ultramar Group:of Companies <br /> Ultramar <br />