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recovered to about 80% of the initial water level, the sample was collected from the well Purge <br /> water was stored on-site in drums A new disposable bailer was used to obtain the groundwater <br /> sample which was placed with minimum cavitation into the appropriate, laboratory prepared <br /> sample containers leaving no headspace The sample container was then immediately capped and <br /> placed in a chilled ice chest for shipment to Priority Environmental Laboratory in Milpitas, <br /> California (a State Certified Testing Lab) under chain-of-custody documentation <br /> Groundwater Contour Map and Flow Gradient <br /> Groundwater contour map was prepared for the data listed in Table 1 above (see Figure 1) <br /> Groundwater elevation contours were plotted to a known/project datum from the measurements <br /> Water levels declined slightly and the groundwater flow direction was to the north under a <br /> calculated gradient of 0 002 <br /> Chemical Analytical Methods and Results <br /> Three groundwater samples were analyzed using EPA Methods 5030/8015 and 602 for Total <br /> Petroleum Hydrocarbons as Gasoline (TPHG), Benzene, Toluene, Ethylbenzene and Xylene (BTEX) <br /> The chain-of-custody and a the Laboratory Analysis Results can be found in Appendix C The <br /> analytical results of the groundwater samples revealed the following (see Table 2), <br /> Table 2. Groundwater Chemical Analytical Data <br /> Well Date TPHG Benzene Toluene Ethylbenzene Xylene <br /> NoSampled ----------------------------- ug/l ------------------------------ <br /> T-1 1/7/88 NA 00907 ND ND ND <br /> T-1 3/26/92 ND ND ND ND ND <br /> T-1 2/18/93 ND ND ND ND ND <br /> T-1 6/10/93 ND ND ND ND ND <br /> T-1 10/11/93 ND ND ND ND ND <br /> T-1 3/28/96 ND ND ND ND ND <br /> T-1 6/27/96 ND ND ND ND ND <br /> T-2 1/7/88 NA ND ND ND ND <br /> T-2 3/26/92 ND ND ND ND ND <br /> T-2 2/18/93 ND ND ND ND ND <br /> T-2 6/10/93 ND ND ND ND ND <br /> T-2 10/11/93 ND ND ND ND ND <br /> T-2 3/28/96 ND ND ND ND ND <br /> T-2 6/27/96 ND ND ND ND ND <br /> • <br />