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P <br /> i} B R a W N A N D �' . " ' _ <br /> r A`( P/1 F1 F� 11 Y I <br /> C A L D W E L L <br /> February 29, 1996 <br /> i <br /> Mr. Brian Cobb <br /> E-Z Serve Petroleum Marketing Company of California <br /> 2550 N Loop West, Suite 600 <br /> Houston, Texas 77292--2021. 11-3003-03 <br /> Subject. Fourth Quarter 1995, Groundwater Monitoring Report <br /> Former E-Z Serve Station #100878 <br /> 1012 West Yosemite Avenue, Manteca, California <br /> Dear Mr. Cobb: <br /> This letter report summanzes the fourth quarter groundwater monitoring activities conducted by <br /> Brown and Caldwell at 1012 West Yosemite Avenue, Manteca, California (Site), on December <br /> 12, 1995 The work performed at the Site included collecting depth-to-water measurements, <br /> purging, and sampling eight wells, and submitting the groundwater samples to an analytical <br /> laboratory for analysis. Field work was performed following the procedures outlined in <br /> Attachment A <br /> Field and Analytical Methods <br /> Initially, depth-to-water and free product measurements were collected from the eight wells by <br /> a Brown and Caldwell field technician using an oil-water interface probe. The wells were then <br /> purged of a minimum.of three well volumes, or until evacuated, using a centrifugal pump. After <br /> purging, each monitoring well was sampled by the Brown and Caldwell field technician using <br /> a disposable bailer Samples were then transferred to appropriate laboratory-supplied containers, <br /> placed in a cooler containing crushed ice, and submitted under appropriate chain of custody to <br /> CKY Incorporated (CKY) for analysis of total petroleum hydrocarbons as gasoline (TPHg) and <br /> benzene, toluene, ethylbenzene, and total xylenes (BTEX) following EPA Methods 8015 <br /> Modified and 8020, respectively CKY is located in Torrance, California and is certified by the <br /> State of California Department of Health Services for analysis of hazardous materials <br /> Groundwater sample collection records and chain-of-custody,documentation for this quarterly <br /> sampling event are included in Attachment A <br /> I <br /> , <br /> 1 1 1 ti l <br /> ti } <br /> I I ! <br /> it 11.REZ1SG51A'i'R1.1'RY111fl087.H4t!'H 1995 W345 <br /> �I 4� <br /> Environ mental,1:000eenngAnn Ca�su)vng AnaIyvcaf5eroces <br /> 4 I ` P 0 So` 844) WkC i T CREFk CA 94, 96 i23p <br /> 3480 BLSkIR& AtiEVIE PLFASINT HiLL CA�94 23 4342 <br /> 0, 141 937 90 9 Fal f5l9} 937 9426 11 iii � 441. a �lns <br />