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\ 1 <br /> C A L D W E L L 12 3 <br /> December 28, 1995 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> Post Office Box 612530 <br /> San Jose, California 95161 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 <br /> the monthly groundwater discharge sampling event for all constituents listed to 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 <br /> at the site from October 23, 1995 through November 15, 1995 Table 1 presents a summary <br /> • of the laboratory analysis to this reporting period (The complete laboratory report for this <br /> reporting period is included in Attachment A) <br /> 11/15/95 Collected effluent water sample for laboratory analysis of total <br /> petroleum hydrocarbons, benzene, ethylbenzene, toluene, and xylenes <br /> (EPA Methods 5030/8015 Modified/8020 and 418 1) The sample was <br /> also analyzed for total lead <br /> The total volume of water discharged during the period was 95,038 gallons The average flow <br /> rate during this period (23 days) was approximately 2.9 gallons per minute. The average daily <br /> flow was 4,132 gallons <br /> Table 2 presents the average pounds per day of each constituent discharged to the sanitary <br /> sewer The quantity of hydrocarbons being discharged is in compliance with the City of <br /> Stockton Wastewater Discharge Permit issued for this site. The constituent quantities were <br /> calculated using the following formula <br /> W = Cug x g x 1b x 3.78 l x Q gal <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 P <br /> vrronmen[dlEngrneenngAndCorxsultrng Analybca!$ervrc25 <br /> 9616 MICRON AtiE -LE SHITE 600 SACR04ENTO CA 95827 2627 <br /> (9 16) 444 0123 FAx (9 16) 8)6 5277 <br />