Laserfiche WebLink
lgmwn ann Caidweil <br /> c . ,. . ._, <br /> �41t • �, .miix ��y ,ryR <br /> December 16, 1991 DEC 2 0 ?nn f <br /> cNVlfTOJlM 1FNTA1_HEALTH <br /> PERN,NT/SER'ViCES <br /> Mr. Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San:Mateo,California 9440" 00-5690-03/1 <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 the <br /> groundwater discharge sampling at ARCO Products Company(ARCO)Station 2133,Iocated at <br /> 2908 Benjamin Holt Drive in Stockton, California. listed chronologically is a summary of the <br /> activities related to the discharoa of groundwater at the site from October 16 through November 4 <br /> 15, 1991. Table 1 presents a summary of the detected constituents for the extraction system,and <br /> the laboratory reports are'presented in Exhibit A. <br /> 10/23/91 Collected effluent water sample for laboratory analysis of total petroleum hydrocarbons <br /> (TPH) and benzene, ethylbe,-tzene, toluene, and xylenes (BEM and metals. <br /> 11/06/91 Sampled extraction system for BErX and TPH. <br /> The average daily flow during this reporting period(31 days)was approximately 5.0 gallons per <br /> minute (gpm). The total flow for this period was 224,000 gallons. The zone of capture of this <br /> extraction system with a 10.5 gpm flow rate on the extraction well was larger than needed, so <br /> the flow rate was reduced to 5.5 gpm during November 4 to November 15, 1991. The average <br /> flaw rate is lower than 5.5 gpm because the system was shut down for maintenance. <br /> The following calculations show average pounds per day of each constituent discharged to the <br /> sanitary sewer. <br /> SG90sC0l21tFSW36'N7032 <br />