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• <br />• <br /> <br />Sanitary Sewer Line. The plant sanitary sewer line is buried below grade. The line is located between <br />the administration building and wastewater treatment plant at the lower tce of the slide. The line will be <br />inspected and any leaks will be repatred to prevent infiltration into [he slide. Conswction of additional <br />corrective measures will be based upon the Observational Approach, with measures undertaken only if <br />dictated by the observed conditions. <br />Horizontal Dewatering Trenches, Micropiles and Retaining Wall Repairs. Further corrective <br />measures could include other horizontal dewatering trenches, micro piles and retaining wall repairs at the <br />portal and along the access roads. The nature of these repairs is discussed in detail in the 1999 Addendum. <br />The observational approach will continue to be used to determine if these types of repairs are required in <br />the future. <br />Barr Engineering Company <br />PCDOCS~230503ICAK <br />December 15, 2000 <br />Appendl: J <br />2001 Addendum to <br />7997/98 Landslide Corrective Measures Report <br />