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4PON� <br />...__ <br />DuPont En <br />vimrunental services <br />June 13, 1990 <br />Job No. 1088-R-4 <br />Conoco Inc. <br />600 North Dairy Ashford <br />TR 3056 <br />Houston, Texas 77079 <br />A"ITEN'11ON: Mr. Gregory P. Fletcher r <br />Coordinator - Environmental Affairs <br />SUBJECT: Monthly Status Report - May 1990 4 <br />Forme Econo Gas Station <br />4325 East Washington Street W'/1F?Qty <br />Stockton, California J`�ffrl7l��, <br />AFFAtR5 <br />Dear Mr. Fletcher: <br />This is a monthly status report for the soil remediation system at the above -referenced site, for the month of May <br />1990. <br />A Du Pont Environmental Services' technician visited the site on a weekly basis. Typical activities <br />performed during the visit included equipment inspection, that were <br />that <br />calibration, influent and effluent <br />concentration measurements, and control system adjustments. A hand-heldorganic <br />laboratory analysis. vapor analyzer (OVA) was <br />used by field technicians to measure hydrocarbon concentrations and one tedlar air bag sample was collected for <br />Based on operating parameters listed on Table A, approximately 1,500 pounds (244 gallons) of gasoline have been <br />extracted during this reporting period. The remediation system has been operating since August 1989, and since <br />then, approximately 11,7?0 pounds (1,911 gallons) of gasoline have been extracted and properly treated. Attached <br />are two figures which show Gasoline Extracted Per Month (Figure 1) and Cumulative Gasoline Extracted (Figure <br />2). <br />Respectfully submitted, <br />DU PONT ENVIRONMENTAL SERVICES <br />Vivek M. Kini 2 <br />'- Staff Engineer Robert A. Katin, PE, REA <br />Engineering Manager <br />VMK/RAK:cb <br />-- - --- -- --- Attachments:---- —Table :4- Operating Parameters <br />Figure I - Gasoline Extracted Per Month <br />Figure 2 - Cumulative Gasoline Extracted <br />7066 Ka11 Center Parkway 5uile 301 Pleasanton, Ca[Aornra-94566 Y 1415) 462.7772 (800)468.2122 W1415)462-7944 <br />Aston. Pernspfranla Plusantcn_ Cal,tom;3 t:ork3,:, Ca�+iarn,3 ffrstpn, reyas - [soca Raton. Flori0a <br />