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Brown and Caldwell <br /> Consu itants Pt E V E <br /> 723 S Street S E P 2 4 1992 <br /> Sacrame <br /> to <br /> • CaVoman95814 7092 ENVIRONMENTAL. HEALTH <br /> (915)444-0123 PERMIT/SERVICCS <br /> FAX(916}44 8437 <br /> September 21, 1992 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Puigas <br /> Post Office Box 5811 <br /> San Mateo, California 34402 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 Drive in Stockton, California Listed chronologically is a <br /> summary of the activities related to the discharge of groundwater at the site from June 16 <br /> through July 15, 1992 Table 1 presents a summary of the detected constituents for the <br /> extraction system to date (The complete laboratory reports for this reporting penod are <br /> included in Attachment A) <br /> 6/24/92 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (TPH), and benzene, ethylbenzene, toluene and xylenes (BETX) <br /> 7/8/92 Collected effluent water sample for laboratory analysis of TPH, BETX, and metals <br /> The average flow rate during this period (31 days) was approximately 3 1 gallons per minute <br /> (gpm) The average daily flow was 4,464 gallons The total volume of water discharged <br /> during the period was 137,000 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 /> • <br /> 66MCORRES Pv6673-04 1-2 <br />