Laserfiche WebLink
aUPONT <br />DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br />7068 Koll Center Parkway, Suite 401 <br />Pleasanton, CA 94566 <br />(415) 462-7772 RECEIVED <br />Fax: (415) 462-7944 Septemher 12, 1990 <br />Job_ No. 1088-R4 <br />Conoco Inc. <br />600 North Dairy Ashford <br />TR 3056 NIVIfi:�i�IMEN fAl <br />Houston, Texas 77079 !'.E= F A1 �S <br />ATTENTION: Mr. Gregory P. Fletcher <br />Coordinator - EnvironmentaI Affairs <br />SUBJECT. Monthly Status Report -Aural. 1990 <br />Former Econo Gas Station <br />4325 East Washington Street <br />Stockton, California <br />Dear Mr. Fletcher: <br />This is a monthly status report for the soil remediation system at the above -referenced site, for the <br />month of August 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 />influent and effluent concentration measurements, and control system adjustments. A hand-held <br />orlanic vapor analyzer (OVA) was used by Geld technicians to measure hydrocarbon concentrations <br />aboratory analysis. On August 15, 1990 the flow rate <br />and one tedlar air bag sample was collected for l <br />was increased to. 100 standard cubic feet per minute, where it remained throughout the reporting <br />period. <br />Based on operating parameters listed on Table A, approximately 1,298 pounds (211 gallons) of gasoline <br />have been extracted during this reporting period. The remediation system has been operating since <br />August 1989, and since then, approximately 15,745 pounds (2,556 gallons) of gasoline have bee. <br />extracted and properly treated. Attached are two figures which show Gasoline Extracted Per Month <br />(Figure 1) and Cumulative Gasoline Extracted (Figure 2). <br />Have a safe day, <br />DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br />Joseph A. De Biaso, Jr. Robert A. Katin, PE, RFA <br />Staff Engineer Engineering Manager <br />JAD/RAK:va- ----- -- - - -= -- - --- <br />Attachments: Table A - Operating Parameters <br />Figure I - Gasolinc Extracted Per Month <br />Figure 2 - Cumulative Gasoline Extracted <br />Better Things For Bette. Living <br />