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I <br /> locking stovepipe well monument Well construction details are depicted on the boring log <br /> included in Appendix I <br /> 4.4 Well Development and Groundwater Sampling <br /> Wellhead elevations of all site monitoring wells were surveyed, water levels were monitored, and <br /> I the newly installed monitoring wells were developed and sampled between October 23 and 25, <br /> 2000 <br /> IPrior to well development, the depth to groundwater was measured in each well and subtracted <br /> Ifrom the surveyed wellhead elevations to determine groundwater elevation Depth to water in <br /> the A Zone wells ranged from 59 02 feet In well MW 1 to 59 79 feet in well MW5 The presence <br /> of drilling mud in B Zone well MW9(B) prevented an accurate depth to water measurement <br /> Wells were developed by surging and pumping to remove suspended fines from the filter pack <br /> Temperature, pH, and electrical conductivity were measured during well development <br /> Groundwater monitoring data sheets and purge logs are included In Appendix III Groundwater <br /> elevation data are presented in Table 7 <br /> Each well was again purged and physical parameters (pH, conductivity, temperature) were <br /> measured a minimum of 24 hours after development Groundwater samples were collected after <br /> physical parameters had stabilized and groundwater levels recovered to at least 80 percent of the <br /> pre-purged levels Samples were submitted to Argon under chain of custody protocol for <br /> analysis Analysts consisted of total petroleum hydrocarbons as gasoline (TPHg) by EPA <br /> method 8015M, benzene, toluene, ethylbenzene, and xylenes (BTEX) by EPA method 8020, and <br /> oxygenated gasoline additives and the lead scavengers 1,2-dichloroethane (DCA) and ethylene <br /> dibromide (EDB) by EPA method 8260B At the request of Jeff Wong of PHS/EHD, an <br /> additional water sample was collected from well MW9(B) and submitted to A&L under chain <br /> of custody protocol for analysis of nitrate using EPA method 353 2 <br /> Water generated during well development was placed into labeled DOT approved 55-gallon <br /> drums, which are currently stored on site pending disposal Groundwater monitoring data sheets <br /> and purge logs are included in Appendix III <br /> I9 <br /> data/gmundze/tulehurg/reports/mud has_wellreportdoe <br />