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r <br /> FILE <br /> F� ._ P 0NT <br /> Du Pont En-dronmental Services March 15, 1990 <br /> Job No. 1088-R-5 <br /> Conoco Inc. <br /> 600 North Dairy Ashford <br /> TR 3038 <br /> Houston, Texas 77079 R E - <br /> V .E D <br /> l ATTENTION: Mr. Gregory P. Fletcher <br /> Coordinator - Environmental Affairs <br /> SUBJECT: Monthly Report - February 1990 =NV11PONWEN i AL <br /> Jet Gas Station AFFAIRS <br /> Soil Remediation System <br /> 800 E. Highway 12 <br /> Lodi, California <br /> Dear Mr. Fletcher: <br /> This monthly report is for the soil remediation system at the Jet Gas Station, 800 E. Highway 12, Lodi, <br /> California, for the month of February. The soil remediation system consists of a blower for gasoline- <br /> contaminated soil vapor extraction and a thermal oxidation unit for soil vapor treatment. <br /> The system operated as per the requirements of San Joaquin County Air Pollution Control District, Permit No. <br /> AP 88-242 during the reporting period. A Du Pont Environmental Services (Du Pont) technician visited the site <br /> once a week during the reporting period. Typical activities during site visits include equipment inspection, <br /> instrument calibration, influent and effluent concentration measurements and control system adjustments. A <br /> hand-held organic vapor analyzer (OVA) was used by field technicians to measure hydrocarbon concentrations <br /> and one Tedlar bag air sample was collected for laboratoryanalysis. <br /> A summary of influent concentrations and extraction rates is shown on Table A. Based on these data and an <br /> average volumetric flow rate,the system has extracted approximately 1,307 pounds of hydrocarbons(212 gallons) <br /> during the reporting period. The remediation system has been operating since December 28, 1989, and since <br /> then approximately 3,215 pounds (522 gallons) of hydrocarbons have been removed from the soil and properly <br /> treated. Attached are two figures which show cumulative gasoline extracted and gasoline extracted per month. <br /> Respectfully submitted, <br /> a <br /> DU PONT ENVIRONMENTAL SERVICES <br /> f, Vivek M. Kini Robert A. Katin, PE, REA <br /> Staff Engineer Engineering Manager <br /> t <br /> VMK/RAK:cb <br /> Attachments: Table A - Operations Summary <br /> Figure 1 - Gasoline Extracted per Month <br /> Figure 2 - Cumulative Gasoline Extracted <br /> cc: Mr. Jogi Khanna, San Joaquin County Air Pollution Control District <br /> 7068 Kali Center Parkway Suite 401 Pleasanton,California 94566 (415)462-7772 (800)468-2122 FAX(415)462-7944 <br /> Aston,Pennsylvania Pleasanton,California Norwalk,California Houston,Texas Boca Ratan,Florida <br /> —-L__ <br />