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E-21 <br />• There is concern that a rU~ture of the well field pipeline could <br />cause oor alit water <br />p qu y ' ..,enter surface drainages. An <br />~._. ,. <br />auxiliary 4-inch diameter pipene is incorporated in the system <br />design which permits draining of the well field pipeline to the <br />evaporation ponds. This will t4a.nimize spills of contaminated <br />water in the event the main well field pipeline is relocated, <br />repaired or in the event of a pipeline rupture. <br />The pregnant liquor tank, barren liquor tank and crystallizers <br />are built over a bermed concrete pad such that any spills will be <br />contained and directed to the evaporation ponds. The areas <br />around the discharge end of the dryer and product <br />handling/loadout area are equipped with berms or drainage <br />• structures so that all contaminated material can be directed to <br />the evaporation ponds. Consequently, contamination to surface <br />water will be minimal. <br />E.7.2 Ground Water <br />The three major concerns involving possible effects to ground <br />water systems includes those associated with subsidence, the <br />production wells and the evaporation and retention ponds and <br />sewage leach field. The possible impacts to ground water as a <br />result of subsidence were discussed in Exhibit D.10.3 and D.10.4. <br />The impacts were believed to be minimal and localized. <br />• <br />