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DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br /> 7068 Koll Center Parkway, Suite 401 <br /> Pleasanton, CA 94566 December 14, 1990 <br /> (415) 462-7772 Job No. 90-E-134 <br /> Fax: (415) 462-7944 <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> ATTENTION: Mr. Glenn R. Dembroff RECEIVED <br /> Manager, Marketing Environmental <br /> DEC 1 7 <br /> SUBJECT: Monthly Status Report - November 1990 <br /> Beac,nn Station 696 <br /> 800 East Highway 12 <br /> Lodi, California <br /> Dear Mr. Dembroff: <br /> This is a monthly status report for the soil remediation system at the above-referenced site, for the <br /> month of November 1990. <br /> A Du Pont Environmental Remediation Services technician visited the site on a weekly basis. Typical <br /> activities that were performed during the visit included equipment inspection, instrument calibration, <br /> and influent and effluent concentration measurements. A hand-held organic vapor analyzer(OVA)was <br /> used by our technician to measure influent hydrocarbon concentrations. <br /> Based on operating parameters listed on Table A, approximately 640 pounds (104 gallons) of gasoline <br /> have been extracted during.the reporting period. The remediation system has been operating on the <br /> on-site vacuum wells since December 1989, and off-site vacuum wells since May 16, 1990. Since then, <br /> approximately 10,000 pounds (1,620 gallons) of gasoline have been extracted and properly treated. <br /> Attached are two figures which show gasoline extracted per month (Figure 1) and cumulative gasoline <br /> k extracted (Figure 2). Vacuum wells that were in service this month are listed in Table B. <br /> This monthly report is not required by the regulatory agencies, and therefore need not be forwarded. <br /> However,should Ultramar desire to forward this to show remediation progress,the agencies that would <br /> be most interested would be: <br /> - SAN JOAQUIN COUNTY AIR POLLUTION CO ROL DISTRICT <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> ATTENTION: Mr. Darrell Singleton, Air Pollution Engineer <br /> SAN JOAQUIN COUNTY LOCAL HEALTH DISTRICT <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> ATTENTION: Ms. Laurie Cotulla <br /> Better Things For Better Living <br />