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f <br /> f r HE rf 1 <br /> B R O W N A ` D - <br /> C A L D W E L L '' °Q <br /> September 22, 1995 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> 2155 South Bascom Avenue, Suite 202 <br /> Campbell, California 95008 017-2060-0111 <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 July 11 through August 22, 1995 Table 1 presents a summary of the laboratory <br /> analysis in this reporting period (The complete laboratory report for this reporting period is <br /> • included in Attachment A) <br /> 8122195 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (EPA Method 418 1), benzene, ethylbenzene, toluene, and xylenes <br /> (EPA Methods 5030/8015 Modified/8020), and total lead (EPA Method 200 7) <br /> The total volume of water discharged during the period was 117,357 gallons The average flow <br /> rate during this period (42 days) was approximately 1 9 gallons per minute The average daily <br /> flow was 2,794 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 /> g lb 3781 Q gal <br /> W = C µg/ L x x 1,000,000 µg 454 g x gal x day <br /> where <br /> • W = Average amount of chemical discharged, lbs/day <br /> Q = Average daily flow <br /> C = Concentration µg/L <br /> Environmental Engineer ng rind Corsulting AnalybCa1 Sery+Ces <br /> 206"0RRFSPAUG95DOC 9616 MICRO` AkEN E SCBE 600 S7CKOIENLU Ca 9?327 2627 <br /> (9161 444 0 12 3 F 9 16} 8)6 )2 7 7 <br />