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Brown and Caldwell <br /> Consultants <br /> 723 SStreet <br /> r 'C <br /> Sacramentoento <br /> CaWomia 95814 7092 r. <br /> (916)444 0123 q E <br /> FAX(9 16)424 6437 A V O 1996 <br /> ENVIRONMENtAL- �4tkf�j <br /> August 12, 1992 PERM I TlIgtr4 V1, <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-6746-04/1 <br /> Subject. 1992 Second Quarterly Report for ARCO Station 2133, <br /> 2908 Benjamin Holt Drive, Stockton, California <br /> Dear Mr Carmel <br /> i <br /> This report presents the second quarterly water levels and analytical results of groundwater <br /> sampling performed at ARCO Products Company (ARCO) Station 2133 located at 2908 <br /> Benjamm Holt Drive in Stockton, California. The sampling was performed on April 22, 1992, <br /> by Emcon and Associates (Emcon) This report was prepared under Task Order 2133-92-5 <br /> There are fifteen on-site wells E-2 through E-12, PR-1, PR-2, BHD-1, and BHD-2 <br /> (Figure 1) A total of 13 wells were sampled Two of the fifteen wells (E-3 and E-6) were <br /> dry or dad not recharge enough for sampling after purging The most likely cause of these <br /> wells going dry is the operation of the groundwater extraction system <br /> Field and Analytical Methods <br /> Emcon personnel measured depth-to-water levels, supervised purging of each well, and <br /> collected groundwater samples at the site. A copy of Emcon's field notes contauung the pH, <br /> electrical conductivity, and temperature readings from well purging is included as 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, ethylbenzene, toluene, and xylenes (BETX) by Modified U S Environmental <br /> Protection Agency Method 8015/5030/8020 In addition, groundwater samples from wells <br /> E-8, BHD-1, and BHD-2 were analyzed for fecal coliform <br /> a <br /> 6740 REPORTS1APR9ZQ7RS.pT <br />