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lap. Brown and Caldwell <br /> Consultants <br /> 723SStreet ' r`" +1 � A �lr7 AI T1 <br /> Sacramento uLr 'r+(, <br /> CaWomia 95814 7492 ? Stit" <br /> (916)444 0123 SEP 2 f Pt f 3ry 9 <br /> FAX(916)444 8437 G 7 <br /> September 23, 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 ystem, ARCO Station 2X33,, <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, Wcated < <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 July 15, 1993, through August 26, 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 penod'ts included in Attachment A). <br /> 8126193 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (EPA Method 8015, Modified), benzene, ethylbenzene, toluene, - <br /> and xylenes (EPA Method 8020), and metals (EPA Method 2003). , <br /> The total volume of water discharged during the period was 196,212 gallons The average <br /> flow rate during this period {41 days) was approximately 3 3 gallons per minute) The <br /> average daily flow was 4,786 gallons <br /> Table 2 presents the average pounds per day of each constituent discharged'to the,sanrtary <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 /> 7452\CORRESPN7452-U4 AUG <br />