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Ms Mary Meays Page 2 <br /> August 12, 1996 <br /> records/field notes associated with the sampling event are presented in <br /> Attachment A. The ground water samples were labeled appropriately and <br /> maintained in a chilled cooler pending transport to the laboratory <br /> As noted in the field notes, well MW-4A was located inside a building that <br /> showed evidence of a fire, most of the eastern half of the inside of the building <br /> appeared to have been significantly affected ERM was subsequently informed <br /> that a fire occurred in the building 1n December 1995 The atmosphere inside the <br /> building was dusty, and residual odors were present Although ash,burnt <br /> wood, and melted plastic were on the floor surface near MW-4A, the well was <br /> not damaged Prior to sampling, the area surrounding MW-4A was swept clean <br /> with a broom <br /> GROUND WATER FLOW PATTERNS <br /> Ground water elevation data for the November 1995 (inadvertently omitted from <br /> the last monitoring report) and the March 1996 monitoring events are presented <br /> in Attachment B These data were posted and contoured on Figures 2 and 3 As <br /> observed on these figures, the ground water flow direction is generally to the <br /> south, with a slight mounding in the immediate vicinity of Former Tank#2 <br /> Ground water flow direction and water level fluctuations observed during these <br /> events are consistent with observations made during the previous sampling <br /> events <br /> ANALYTICAL RESULTS <br /> Samples from all ten wells were analyzed for TPH(gasolfne) by EPA Method <br /> 8015 modified, and for BTEX compounds using USEPA method 8020 In <br /> addition, wells MW-3, and MW-5 near Former Tank Site 1, and wells MW-1A, <br /> MW-2A, and MW-3A, near Former Tank Site 2 were analyzed for TPH(diesel) <br /> All analyses were performed by Inchcape Testing Services of San Jose, California <br /> Laboratory data sheets and Chain-of-Custody forms associated with the March <br /> 1996 sampling event are included in Attachment A of this letter Attachment C <br /> provides the November 1995 laboratory reports inadvertently omitted from the <br /> last monitoring report <br /> TPH as diesel and gasoline, and BTEX compounds were detected in ground <br /> water samples collected from Former Tank Sites#1 and #2, at concentrations <br /> similar to those associated with recent sampling rounds These detections are <br /> summarized below and in Tables 1 and 2, respectively <br />