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J <br /> B R 0 W N A N D `{' ;.'t <br /> V <br /> C A L D W E L L PH ! <br /> December 6, 1993 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-7453-01/1 <br /> Subject Third 1993 Quarterly Report for ARCO Station 2133, <br /> 2908 Benjamin Holt Drive, Stockton, California <br /> Dear Mr Carmel <br /> This report presents water level measurements, results of groundwater sampling, and <br /> summarizes the status of the groundwater extraction system (GWES) This work was <br /> performed during the third quarter of 1993 at ARCO Products Company (ARCO)Station 2133 <br /> located at 2908 Benjamin Holt Drive in Stockton, California The field work for the quarterly <br /> groundwater sampling was performed on August 5, 1993, by Emcon and Associates (Emcon) <br /> Field work for the operation and maintenance of the GWES was conducted by Brown and <br /> Caldwell This report was prepared under Task Order 2133-93-5 <br /> There is one groundwater extraction well (R) on-site There are nine on-site groundwater <br /> monitoring wells (E-2 through E-6 and E-9 through E-12), and six off-site groundwater <br /> monitoring wells (E-7, E-8, PR-1, PR-2, BHD-1, and BHD-2) (Figure 1) All groundwater <br /> monitoring wells were sampled for the quarterly sampling event <br /> Quarterly Sampling Field and Analytical Methods <br /> Emcon personnel measured depth-to-water, supervised purging of each well, and collected <br /> groundwater samples at the site A copy of Emcon's field notes is included in Exhibit A <br /> The purge water generated during this sampling event was temporarily stored on site in <br /> 55-gallon barrels then transported off site by Balch Petroleum Company <br /> All groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-G) <br /> and benzene, toluene, ethylbenzene, and xylenes (BTEX) by U S Environmental Protection <br /> Agency Methods 5030/8020/DHS LUPT <br /> 1=A)4V_rev45rR9MR7S\3RD93QrT1t k� <br /> Environmental Engineering And Consulting Anal tical Se-1CeS <br /> 9616 MICRON A% L N U E P 0 Bor 13449 S NCRI\IEITO CA 9)813 3449 <br /> 19161444 0 12 3 F,ti (9161856 X277 Ctg$ <br />