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4 <br /> containing data on t erature, conductivity, pH, depth to water, and well volumes urged are <br />• attached <br /> The groundwater sample was collected with a new disposable bailer The groundwater sample <br /> was then poured with minimum cavitation into the appropriate, laboratory prepared sample <br /> containers leaving no headspace The sample container was then immediately capped, labeled and <br /> placed in a chilled ice chest for shipment to Chromalab, Inc in Pleasanton, California (a State <br /> Certified Testing Lab) under chain-of-custody documentation <br /> Groundwater Contour Map and Flow Gradient <br /> A groundwater contour map to a known datum was prepared for the data listed in Table i above <br /> (see Figure 1) The groundwater flow direction was to the north-northwesterly under a <br /> calculated gradient of 0 0036 The flow direction is consistent with historic observed trends, <br /> and remains relatively flat Overall groundwater levels appear to have fallen slightly from the <br /> previous quarter <br /> Chemical Analytical Methods and Results <br /> Nine groundwater samples were analyzed using EPA Methods 5030/8015, 602 and 8260 for <br /> Total Petroleum Hydrocarbons as Gasoline (TPHG), Benzene, Toluene, Ethylbenzene and Xylene <br /> (BTEX) and fuel oxygenates including Methyl-tert-butyl-ether (MTBE) and Volatile Organic <br /> Compounds The analytical results of the groundwater samples are attached and listed with <br />. historic data below (see Table 2), <br /> Table 2 Groundwater Chemical Data <br /> Well Date TPHG Benzene Toluene Ethylbenzene Xylene Fuel Ox <br /> NoSampled ----------------------------- ug/l ------------------------------- <br /> MW-1 3/28/96 NO ND ND NO ND NA <br /> MW-11 6/27/96 280 0 7 0 6 2 4 9 1 NA <br /> MW-1 12/19/96 NO NO ND NO ND ND <br /> MW-1 3/10/97 ND NO NO NO ND ND <br /> MW-1 6/30/97 ND NO ND ND NO ND <br /> MW-1 8/20/97 NO NO NO ND NO NO <br /> MW-1 12/12/97 ND NO ND ND NO NO <br /> MW-1 3/31/98 150 16 9 5 5 3 36 NO <br /> MW-1 6/30/98 NO ND ND ND ND NO <br /> MW-1 9/29/98 NO ND ND NO ND NO <br /> MW-1 1114/99 NO NO NO ND ND NO <br /> MW-1 4129199 NO NO 11 ND 16 ND <br /> MW-1 6/30/99 _ ND NO NO NO ND ND <br />• <br /> Page 4 <br />