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til <br /> B R O W N A N D <br /> i C A L D W E L L <br /> May 19 1994 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-1273-01/1 <br /> Subject Status of Groundwater Extraction System, ARCO Station 2133, <br /> Stockton, Califorirua <br /> Dear Mr Carmel <br /> This letter presents the current status of the groundwater extraction system and the results of <br /> groundwater discharge sampling at ARCO Products Company (ARCO) Station 2133, located <br /> at 2908 Benjamin Holt Drive in Stockton, California Listed below is a summary of activities <br /> and discharge of groundwater at the site from March 16, 1994, through April 12, 1994 <br /> Table 1 presents a summary of the laboratory analysis in tins reporting period (The complete <br /> laboratory report for this reporting period is included in Attachment A) <br /> 4/I2/94 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (EPA Method 8015, Modified), benzene, ethylbenzene, toluene, <br /> and xylenes (EPA Method 602), and trace metals (EPA Method 200 7) <br /> The total volume of water discharged during the period was 385,000 gallons The average <br /> flow rate during this period (27 days) was approximately 9 9 gallons per minute The average <br /> daily flow was 14,259 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 /> This report was prepared in accordance with the standards of the environmental consulting industry at the time it was <br /> prepared It should not be relied upon by parties other than those for whom it was prepared, and then only to the <br /> extent of the scope of work which was authorized This report does not guarantee that any additional environmental <br /> conditions beyond that described in this report exist at this site <br /> 1273\CORRESP�1273MAY RPr <br /> Environmental Engineering And ConsulRng Analvbcal Services <br /> 9616 11icRoti ltierui P d Box 13449 SVCR %MLNTO CA 45813 3449 <br /> (916) 444 0123 Fat 19161 856 5277 <br />