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TABLE 4 <br />'0 ANALYTICAL RESULTS FOR BORINGS B-1, B-2 & B-3 (MW-1, MW-2 & MW-3) <br /> March 9 and 10, 1993 <br /> (mg/kg) <br /> Ethyl- <br /> Sample ID TPH as Gas Benzene Toluene benzene Xylene <br /> B1-40 ND ND ND ND M ND <br /> B1-50 ND ND ND ND ND <br /> 1 B2-35 ND ND ND ND ND <br /> I B2-45 ND 00079 ND ND ND <br /> B2-50 ND ND ND ND ND <br />' B3-40 ND ND ND ND ND - <br /> LI B3-50 ND ND ND ND ND <br /> L&kg=pam per m1mon m <br /> ND=Not detected <br /> 3.4.1 Groundwater Sampling, June 1993 <br /> 10 A second sampling event occurred on June 24, 1993 Between March 1993 and June 1993 <br /> water levels rose approximately 2 to 2 112 feet in all wells (see Table 5) The gradient <br /> direction for the June sampling event was determined to be 0 0025 ft/ft directed S 70° E <br /> No petroleum hydrocarbons were detected in any of the samples <br /> 3.4.2 Groundwater Sampling, October 1993 _ <br /> On October 14, 1993, personnel from GeoAudit attempted to purge standing water from the <br /> monitoring wells using a submersible pump However, because of heavy equipment <br /> operation at the site during excavation and soil disposal, the wells contained too much silt <br />' and could not be purged Personnel returned to the site on October 18, 1993 to redevelop <br /> the wells and perform the monitoring <br /> In October 1993, the hydraulic gradient was calculated to be 0 0050 ft/ft directed S 72° E <br />' This gradient is steeper than the previous gradient of 0 0025 ft/ft, but the direction is nearly <br /> identical to the June 1993 direction of S 70° E No petroleum hydrocarbons were detected <br />' in any of the samples <br /> 3.43 Groundwater Sampling, January 1994 <br />' On January 14, 1994 each well was monitored and sampled for the fourth time Between <br /> a.olopol A.&Servs.I- <br /> 7 <br /> tra al Qwcu�w <br /> 1 <br />