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Table 1 Monitoring Wells Water Levels, con't Well Date Well Depth to Casing Water Floating No Sampled Depth Water Elev Elev Product (ft) (ft) (MSL ft)` (MSL ft) MW-3 9/14/95 16 28 7 65 4794 4029 None M W-3 3/28/96 16 15 690 ----- 41 04 None MW-3 6/27/96 16 10 7 37 ----- 41 57 None MW-3 12/19/96 16 10 725 ----- 40 69 None MW-3 3/10197 1610 716 ----- 40 78 None M W-3 6/30/97 1610 7 64 ----- 40 32 None M W-3 8/20/97 16 10 7 90 ----- 40 04 None MW-4A 8/20197 16 45 8 21 47 60 39 39 None MW-5A 8/20/97 16 95 820 4779 39 59 None MW-6A 8/20/97 17 45 822 48 92 40 70 None MW-7A 8120197 14 95 782 48 78 40 96 None MW-8A 8120197 16 00 7 96 47 90 39 94 None MW-9A 8/20197 15 95 8 33 48 28 39 95 None Casing elevation data from Evax Technologies, Site Investigation Report, April 7, 1992 A Casing elevation data from Triple E" Engineering and Surveying, August 14, 1997 The sampler proceeded to purge well volumes of groundwater using a submersible electric purging pump (a volume calculation was done for each well following sounding measurements) Between each well volume purge, conductivity, pH, and water temperature readings were obtained and noted on the attached groundwater sampling information sheets Once these readings stabilized after two consecutive purge volumes aquifer water is assumed to be entering the well When the well recovered to about 80% of the initial water level, the sample was collected Purge water was stored on-site in drums The well sampling information sheets containing data on temperature, conductivity, pH, depth to water, and well volumes purged are attached The groundwater sample was collected with a new disposable bailer The groundwater sample was then poured with minimum cavitation into the appropriate, laboratory prepared sample containers leaving no headspace The sample container was then immediately capped, labeled and placed in a chilled ice chest for shipment to Priority Environmental Laboratory i n Milpitas, California (a State Certified Testing Lab) under chain-of-custody documentation Groundwater Contour Map and Flow Gradient A groundwater contour map was prepared for the data listed in Table 1 above (see Figure 1 ) Groundwater elevation contours were plotted to a known datum The groundwater flow direction was to the north-northeast under a calculated gradient of 0 0038 The flow direction is consistent with historic observed trends, and remains relatively flat Page 2