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Given that the spoil unit is both unconsolidated and relatively <br />continuous, spoil water levels and quality should generally be <br />consistent within the unit. In order to monitor the rate of spoil <br />re-saturation and spoil water levels and water quality, Kerr proposes <br />to establish a spoil well in the central portion of the backfilled <br />720 Pit area. This location is slightly south of the center of the <br />spoil unit and should be adequate for monitoring spoil ground water <br />conditions while avoiding potential secondary ground water effects <br />from the nearby reclaimed Canadian Strip Mine. Installation of the <br />proposed spoil monitoring well will be deferred to allow reasonable <br />settlement and consolidation of the 720 Pit backfill, with <br />installation anticipated by fall of the year 2000. <br />2. Reduction .in the number of ground water sites to be monitored. <br />Water quality information collected since the 1979/80-baseline <br />period, Rerr submitted that further data collection from un- <br />disturbed, non-impacted or peripheral areas was unwarranted. The <br />following changes were made to the monitoring schedule. <br />Wells eliminated permanently included AP-3 and AP-4 located at the <br />Loadout. Monitoring in groundwater wells 79-1, 79-2, 79-3 and 79-61 <br />was temporarily halted until the last Z years before possible bond <br />release 12005 and 2006). <br />3. In TR-19, Kerr requested elimination of unnecessary water <br />quality analysis parameters including those not required by the DMG <br />or parameters which have consistently shown very low levels or not- <br />detect values. The monitoring program has included the following <br />parameters: <br />Field Parameters <br />• Water Level <br />• Temperature <br />• pH <br />• Electrical Conductivity 1E. C.) <br />TR-23 780-108 Revised June 2007 <br />