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r <br /> ` � Brown and Caidweif <br /> Consultants RECEIVED <br /> Sacramento <br /> 723 S Sireet <br /> Cal�fom a 95814 7092 0 CT 2 $ 1902 <br /> (916)444 0123 <br /> FAX(916)4444PA37 ENVIRONMENTAL+. HEAJH <br /> PERM IT/SERVICES <br /> October 22, 1992 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-6673-04/1 <br /> Subject: Status of Groundwater Extraction System, ARCO Station 2133, <br /> Stockton, California <br /> Dear Mr Carmel. <br /> This letter presents the current status of the groundwater extraction system and the results of <br /> the groundwater discharge sampling at ARCO Products Company (ARCO) Station 2133, <br /> located at 2908 Benjamin Holt Dnve in Stockton, California. Listed below is a chronological <br /> summary of acuvities related to the discharge of groundwater at the site from July lb through <br /> August 15, 1992. Table i presents a summary of the detected constituents for the extraction <br /> system to date. (The complete laboratory reports for this reporting period are included in <br /> Attachment A). <br /> 7/22/92 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (TPH), and benzene, ethylbenzene, toluene and xylenes (BEM <br /> 8/12/92 Collected effluent water sample for laboratory analysis of TPH,BETX, and metals. <br /> The average flow rate during thus period (31 days) was approximately 2 8 gallons per minute <br /> (gpm) The average daily flow was 4,032 gallons The total volume of water discharged <br /> during the period was 126,000 gallons. <br /> Table 2 presents the average pounds per day of each constituent discharged to the sanitary <br /> sewer The constituent quantities were calculated using the formula below The quantity of <br /> hydrocarbons being discharged is in compliance with the City of Stockton Wastewater <br /> Discharge Permit issued for this site. <br /> 667.V4D=tHSP6M-0a i.s <br />