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ACTON • <br /> RECEIVED <br /> MICKELSON • APR 2 7 1995 <br /> van DAM, INC. <br /> Consulting Scientists, Engineers,and Geologists <br /> April 24 199 0 <br /> p S <br /> Mq y� <br /> 01 TP <br /> Ig <br /> r~N�„� 95 <br /> Mr Kenneth Earnest P��M1T S RTi(yt'1( <br /> Ty <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 19005.13/7 <br /> Subject First Quarter 1995 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 Ietter to document remediation <br /> activity at the referenced site during the first quarter of 1995, specifically, the period from <br /> December 16, 1994 to March 13, 1995. 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 22 days in the 87-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 /> December 16, 1994 to January 26, 1995 <br /> The vapor extraction system (with carbon adsorption) was started but only ran for about 7 days <br /> before shutdown was necessary because of carbon breakthrough. The vapor extraction system <br /> extracted an estimated 29 pounds of hydrocarbons (based on field readings) Laboratory analysis <br /> for the influent air bag sample collected on January 12, 1995, was nondetect for benzene. The <br /> resulting estimated benzene extraction was 0 0 pound. As of January 26, 1995, the cumulative <br /> totals for extraction amounts since start-up of the system were 12,781 pounds of hydrocarbons <br /> and 211 pounds of benzene <br /> lrpt182 nj <br /> 4511 Golden Foothill Parkway,Suite 1 (916)939-7550 <br /> EI Dorado Hills, California 95762 Fax(916)939-7570 <br />