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1 <br /> BROWN ANo <br /> C A L D W E L L 31> <br /> Jo -2 <br /> February 27, 1995 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> 2155 South Bascom Avenue, Suite 202 <br /> Campbell, California 95008 017-1273-01/1 <br /> Subject Fourth 1994 Quarterly Report for ARCO Facility 2133, <br /> 2908 Benjamin Holt Drive, Stockton, California, Site Code 1021 <br /> Dear Mr Christie <br /> This report presents water-level measurements and results of groundwater sampling performed <br /> during the fourth quarter of 1994 at ARCO Products Company (ARCO) Facility 2133 located <br /> at 2908 Benjamin Holt Drive in Stockton, California Fieldwork was performed by <br /> Groundwater Technology, Inc (GTI) on December 8, 1994 This report was prepared under <br /> Task Order 2133-945 <br /> There are eleven on-site groundwater monitoring wells (E-2 through E-6, E-9 through E-12, <br /> and MW-1 and MW-2), six off-site groundwater monitoring wells (E-7, E-8, PR-1, PR-2, <br /> BHD-1, and BHD-2) and one on-site groundwater extraction well (R) as shown on Figure 1 <br /> In addition, there are 12 soil vapor extraction wells (V-1 through V-12) and nine air sparging <br /> wells (S-1 through S-9) on-site Wells V-9/S-7 and V-10/S-8 are constructed as dual <br /> completion wells <br /> Field and Analytical Methods <br /> GTI personnel measured depth-to-water and product thickness (when present), purged each <br /> well to be sampled, and collected groundwater samples at the site Depth-to-water <br /> measurements and a check for free product were made prior to purging <br /> Before sampling, the wells were purged of a minimum of three well casing volumes or until <br /> evacuated using a submersible pump or bailer After purging, each well was sampled using <br /> a disposable bailer All groundwater samples were analyzed for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) and total petroleum hydrocarbons as gasoline (TPH-G) by <br /> U S Environmental Protection Agency (EPA) Method 503018020, and 8015 Modified <br /> Field data sheets and chain-of-custody documentation are included in Exhibit A <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 no additional environmental <br /> contamination beyond that described in this report exists at the site <br /> Envrronmenral Engineering And Consulting Ana)yt cal 5erwces <br /> 9616 MICRo,, Al F`LF SATE 600 S �CRN%II ',T0 CA 9) 8 2 7 2627]273\REP0RTS\4TH94QTRRPT <br /> 19161 434 0123 Far 19161 8)6 )2 7 7 <br />