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concentrations Table 1 includes the summarized results of TOC analyses. Hard copies of the <br /> laboratory data are presented in Appendix C. <br /> 3.2 Water-Level Measurements <br /> ' Water-level elevations of all the wells MW-1 MW-2 MW-3 and MW-5 were <br /> measured on October 18, 1994 Water-level measurements were recorded using an electric <br /> water-level probe graduated in 4 02-foot increments. On October 31, 1994, the elevations of <br /> ' the newly constructed monitor well MW-5 and existing monitor wells MW-1, MW-2, and <br /> MW-3 were surveyed with respect to an arbitrary datum An arbitrary datum of 30 feet msl <br /> ' was assigned to the southwest corner of the ammonia cooler foundation stab and was marked <br /> with white paint. This datum was later set at 16 2 feet msl based on the verification of the <br /> previous well survey performed by WHF, which more closely represent actual msI elevations <br />' of the wells. The elevations of the wells (lowest point on open well casing, marked) were <br /> made with respect to the arbitrary datum. The well elevation data and depth to groundwater <br />' data is presented on Table 3. The gradient appears to be flowing in a northeast direction at <br /> an approximate slope of 0 002 ft/ft The approximate groundwater elevations (msl) of each <br /> IPwell and the approximate contours of the October 18, 1994 measurement are shown on <br /> Figure 3 <br /> 3.3 Groundwater Monitoring Well Development, Purging and Sampling <br /> The newly installed groundwater monitor well MW-5 was developed October 17, 1994, <br /> about 2 weeks after its completion A teflon bailer was used to surge the sand pack and to <br /> remove fines and groundwater from the well. Approximately 50-gallons of water were <br />' removed from the well during the development process The development water was <br /> containerized in a labeled DOT approved 55-gallon storage drum that is presently stored on- <br /> site. <br />' On October 18, 1994, monitoring wells MW-1, MW-2, MW-3, and MW-5 were purged <br /> by bailing approximately 3 well-casing volumes of water out of each well using a cleaned <br /> Teflon bailer Measurements of the evacuated water's cumulative volume purged, pH, specific <br /> conductance, and temperature were recorded during purging Table 4 summarizes these <br /> parameters, which were monitored at each of the wells during purging. The purge water <br /> rtlunwn�oewmsc,pi 7 <br />