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3.2 Logging <br /> Soil from the middle brass tube was extruded into a plastic bag and screened for organic <br /> vapors using a photo-ionization detector(PID), and the readings recorded on the boring log <br /> The soil was described in accordance with the Unified Soil Classification System (see Boring <br /> ' Logs, Appendix A) <br /> 3.3 Well Completion <br /> Borings MW1, MW2 and MW3 were completed as groundwater monitoring wells using 2- <br /> inch diameter PVC casing with 20 feet of 0 020 screen The filter pack (#3 Lonestar sand) <br /> ' was installed from total depth to 2 feet above the screen interval Bentomte pellets were <br /> used to make a 2-foot plug, and the wells were grouted to the surface with portland cement <br /> ' Borings B4 through B8 were grouted from total depth to the surface with portland cement <br /> 3.4 Well Surveying and Sampling <br /> ' On May 6, 1994, the tops of the v lI casings were surveyed relative to an arbitrary datum <br /> of 100 00 feet established on site The datum point is located at the edge of the main office <br /> building located south of all monitoring wells A Solmst water Ievel meter then was used to <br /> measure depth to water in all monitoring wells relative to the top of the casing (Table 2) <br /> The relative groundwater elevations were calculated from these data <br /> TABLE 2 <br /> RELATIVE GROUNDWATER ELEVATIONS <br /> ' May 6, 1994 <br /> Well No Relative Casing Depth to Relative <br /> ' Elevation Groundwater Groundwater <br /> EIevation <br /> ' MW1 9903 2021 7882 <br /> MW2 9931 2048 7883 <br /> ' MW3 9855 1967 7888 <br /> e"Umments m eet <br />' After water levels were measured, a clean PVC bailer was used to surge and purge each <br /> well. A 3-stage purge pump was then used to purge each well of a total of approximately 15 <br /> gallons of water to stabilize temperature, pH, and the conductivity (Appendix B) <br />' Measurements were obtained using an ICM Water Analyzer Model #52200 No floating <br /> product was observed in any of the wells However, a distinct hydrocarbon sheen was <br /> observed in the water from MW2 The purge water was stored on-site in 55-gallon DOT- <br /> approved drums After purging each well, a water sample was collected from each well <br /> 0-69.1 A-&s.m.e.[.e 6 <br /> PF-.F%m$emen QR/LP4Al3-s <br />