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`Ton Vorster • -2- 00 March 1988 <br /> detectable contaminants in these wells. <br /> Additional monitoring well (s) are not warranted at this time. <br /> Because of the shift in the local ground water gradient and the <br /> possibility of an undetected plume escaping detection I recommend <br /> that the BDC continue with a modified monitoring program. This <br /> program should consist of monthly water level measurements and <br /> quarterly sampling for TPH and BTX. After six months of water level <br /> measurements we should assess if an additional monitoring well (s) <br /> is/hre necessary to monitor the actual downgradient conditions. <br />