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t ja <br /> ACTON <br /> MICKELSON - <br /> van DAM, INC. <br /> Consulting Scientists,Engineers,and Geologists <br /> January 16, 1995 <br /> � EC � � yEL9 <br /> Mr Kenneth Earnest JAN L 3 10 <br /> Ultramar Inc <br /> 525 West Third Street <br /> Hanford, California 93230 19005 1317 <br /> Subject. Fourth Quarter 1994 Remediation Status Report--Former Beacon Station #494 <br /> Located at 2185 East Fremont Street, Stockton, California <br /> Dear Mr Earnest. <br /> Acton • Mickelson • van Dam, Inc (AMV), prepared this letter to document remediation <br /> activity at the referenced site during the fourth quarter of 1994, specifically, the period from <br /> September 22 to December 16, 1994 Table 1 summarizes the performance of the vapor <br /> • extraction system Figure 1 graphically presents hydrocarbon extraction rates versus time for <br /> the vapor extraction system. <br /> The vapor extraction system ran a total of 18 days in the 85-day reporting period. Following <br /> is a month-by-month summary of activity for both the vapor extraction system and ground water <br /> extraction system <br /> September 22 to October 27, 1994 <br /> The vapor extraction system ran continuously from September 22 to October 10, 1994 The <br /> Thermtech oxidation unit was shut down on October 10, 1994, for transportation to another site <br /> The vapor extraction system extracted an estimated 278 pounds of hydrocarbons (based on field <br /> readings) Laboratory analysis for the influent air bag sample collected on September 22, 1994, <br /> was nondetectable for benzene The resulting estimated benzene extraction was 0.0 pound. As <br /> of October 27, 1994, the cumulative totals for extraction amounts since start-up of the system <br /> were 12,752 pounds of hydrocarbons and 211 pounds of benzene <br /> During this reporting period, the ground water extraction system pumped continuously and <br /> extracted 11,366 gallons of water from monitoring well MW-3 As of October 27, 1994, the <br /> ground water extraction system extracted a cumulative total of 119,396 gallons from monitoring <br /> well MW-3 <br /> • <br /> irpus2 mj <br /> 4511 Golden Foothill Parkway,Suite 1 (916)939-7550 <br /> EI Dorado Hills,California 95762 Fax (916)939-7570 <br />