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ACTON • <br /> MICKELSON • <br /> van DAM, INC. <br /> Consulting Scientists,Engineers,and Geologists <br /> Rp <br /> June 27 1994 � ti <br /> JUN 3 0 1994 <br /> 4 Mr. Kenneth Earnest ENVIRONMENTAL HEALTH <br /> Ultramar Inc. PERMIT/SERVICES <br /> 525 West Third Street <br /> Hanford, California 93230 19005.1017 <br /> Subject: May 1994 Self-Monitoring Report for Beacon Station #494 <br /> 2185 East Fremont Street, Stockton, California <br /> Dear Mr. Earnest: <br /> �A <br /> Acton • Mickelson • vam,.Dr, Inc. (AMV), prepared for Ultramar Inc. (Ultramar) this <br /> . Self-Monitoring Report as required by the provisions of the City of Stockton Self-Monitoring <br /> Program for discharge to the sanitary sewer. This report presents the results of all <br /> measurements and analyses during the period from April 29, 1994 through May 31, 1994. <br /> Included in this report is a summary of the ground water extraction system performance as <br /> monitored during routine operation and maintenance activities. <br /> Operation of the ground water extraction system during the reporting period resulted in no <br /> violations of the waste discharge requirements. <br /> Compliance Evaluation Summary <br /> During the reporting period, the ground water extraction system ran approximately 16 days over <br /> the 33-day period and discharged an average of 268 gallons per day. The system was down <br /> approximately 17 days due to a high-liquid shutdown in the secondary containment tank caused <br /> by an apparent leak in the pump discharge line to the receiving tank. The problem was rectified <br /> on May 16, 1994, and the system ran continuously for the remainder of the period. The <br /> cumulative volume of ground water discharged as of May 31, 1994, was 70,858 gallons. <br /> Per the requirements outlined in the Self-Monitoring Program sampling schedule, ground water <br /> extracted at the site (Figure 1) by continuously pumping monitoring well MW-3 was sampled <br /> twice during the reporting period for laboratory analysis of benzene, toluene, ethylbenzene, and <br /> Irptlos.mj <br /> 4511 Golden Foothill Parkway,Suite 1 (916) 939-7550 <br /> Fl Dorado Hills, California 95762 Fax (916) 939-7570 <br />