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Brown and Caldweil <br /> Consultants <br /> 723 5 Street <br /> Sacramento <br /> California 95814 7092 <br /> (916)444 0123 FED J �h g <br /> FAX(916)444 8437 �3 J <br /> ENVIRONMENTAL HEALTH <br /> February 16 1C393 PrE MIV,bEh'J <br /> Mr Chuck Carmel <br /> ARCO Products Companv <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, Califomia 94402 017-6673-04/1 <br /> Subject Status of Groundwater Extraction System. ARCO Station 2133, <br /> Stockton. California <br /> Dear Mr Carmel <br /> Tlus 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 below is a chronological <br /> summary of activities related to the discharge of groundwater at the site from October 16 <br /> through November 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 period are <br /> included in Attachment A) <br /> 10/31/92 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (TPH), and benzene, ethylbenzene, toluene and xylenes (B ETX) <br /> 11/11/92 Collected effluent water sample for laboratory analysis of TPH, BETX, and metals <br /> The average flow rate during this period (31 days) was approximately 2 1 gallons per minute <br /> (gpm) The average daily flow was 3,000 gallons The total volume of water discharged <br /> during the period was 63 500 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 /> l9ti` <br /> 6673%rot:Rst,6673-04 i-6 <br />