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lawn ai1i1 Ca'-11 ie-51 <br /> { <br /> august .61991 <br /> Mr. Chuck Carmel <br /> ARCO products Company <br /> 2000 Alameda de lnig Pulgas 017-5690-4111 <br /> post office Box 5811 <br /> San Mateo,California 94402 <br /> Subject: Stalus 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 systeS�ano he results of the <br /> 2133,ocated at <br /> groundwater discharge sampling at ARCO products Company(ARCO) <br /> Listed chronologically below is a summary' <br /> 2908 Benjamin Holt Drive in Stockton,Cagroz�ua 16 through August <br /> of the activities related to the discharge of groundwater at the site from July <br /> 15, a act Table l presents a summary of the detected constituents for the cxtra t=on system, <br /> for laboratory analysis of total petroleum hydrocarbons <br /> 612,6191 Conected effluent water sampleand (BE=(BEand metals. <br /> (TPH) and benzene,ethylbenzene, toluene, <br /> 7110191 Sampled extraction system for BE-TX and TPH. <br /> 71ZA191 Sampled extraction system for BM and TPH End metals. <br /> 817191 Sampled extraction System for BEIX <br /> and TpH. <br /> rind(31 days)was appro�nately 10.1 gallons per <br /> The average daily flow daring this reporting pe ailon's. <br /> minute. The total flow for this period war 451,000 g ed <br /> ch constituent discharged to the <br /> The following calculations show average po nd° per day of ea <br /> sanitary sewer. <br /> Q _ Average flow rate, gpm <br /> C _ Concentration, ugll lbs da <br /> W _ Average an=o'1nt of chemical discharged, <br /> 1 Y <br /> 0.000123 C for Q= 10.1 Urn <br /> W Q x 1,440 x 8.34 x CA1,00(,000,000) = <br />