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.r <br /> B R J W N A N D F,VIR0��''EI, AL Inti AI_TII <br /> Cr 7; I <br /> C A L D W E L L 913 NOV 16 FPS !. 54 <br /> November 12, 1993 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-7452-0411 <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 /> 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 September 14, 1993, through October 13, 1993 <br /> Table 1 presents a summary of the detected constituents for the extraction system to date <br /> (The complete laboratory report for this reporting period is included in Attachment A) <br /> 10/13/93 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 organic lead (EPA Method 200 7) <br /> The total volume of water discharged dunng the period was 278,632 gallons The average <br /> flow rate during this period (29 days) was approximately 6 7 gallons per minute The average <br /> daily flow was 9,608 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 IT parties other than those for whom it was prepared, and then only to the <br /> extent of the scope of worn which was authorized This report does not guarantee that any additional environmental <br /> conditions beyond that described in this report evist at this site <br /> 74521CORRCSP17452 bl NOV <br /> Environmental Engineering And ConSuMng AnalytlCa1 Services <br /> 9616 NhcRov A%LNLE P 0 Boy 13449 SACRAMENTO CA 95813 3449 /r _ <br /> (916) 444 0123 F�x (916) 836 5277 �l(I <br />