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BROWN AND <br /> C A L D W E L L <br /> October 24, 1995 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> 2155 South Bascom Avenue, Suite 202 <br /> Campbell, California 95008 017-2060-01/1 <br /> Subject Status of Groundwater Extraction System, ARCO Facility 2133, <br /> Stockton, California <br /> Dear Mr Christie <br /> This letter presents the current status of the groundwater extraction system and the results of the <br /> monthly groundwater discharge sampling event for all constituents listed in the permit for <br /> ARCO Products Company (ARCO) Facility 2133, located at 2908 Benjamin Holt Drive in <br /> Stockton, California Listed below is a summary of activities and discharge of groundwater at <br /> the site from August 23 through September 19, 1995 Table l presents a summary of the <br /> • laboratory analysis in this reporting period (The complete laboratory report for this reporting <br /> period is included in Attachment A) <br /> 9119195 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons, benzene, ethylbenzene, toluene, and xylenes (EPA Methods <br /> 5030/8015 Modified/8020) <br /> The total volume of water discharged during the period was 48,384 gallons The average flow <br /> rate during this period (28 days) was approximately 1 2 gallons per minute The average daily <br /> flow was 1,728 gallons <br /> Table 2 presents the average pounds per day of each constituent discharged to the sanitary sewer <br /> The quantity of hydrocarbons being discharged is in compliance with the City of Stockton <br /> Wastewater Discharge Permit issued for this site The constituent quantities were calculated <br /> using the following formula <br /> W — C99 x g x lb X 378L x Qgal <br /> L 1,000,000 µg 454 g gal day <br /> where <br /> W = Average amount of chemical discharged, lbs/day <br /> Q = Average daily flow <br /> C = Concentration pg/L <br /> Environmental Engineering And Consulting Anafyvcaf Services <br /> 206PCORRESP�AUG95DOC 9616 %11CR0AtiELE $LITE 600 S-\CRkNiENT0 C -1 9 527 2627 <br /> (9 16 444 0 12 3 FAQ (916) 8 6 )2 7 7 <br />