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Memo to David Bird 2 October 2, 2009 <br />Perimeter Drain Review Permit No. M-1983-176 <br />other forms of assurance, or must provide an alternate plan for ground water controls that will not require <br />maintenance. <br />In addition, to gain DRMS approval for installation of the perimeter drain, the Applicant must provide the <br />following commitments: <br />1. Provide engineering oversight during construction of the perimeter drain sufficient to allow for an <br />engineer's certification that the construction was completed in accordance with the design. The <br />engineer's certification must be provided for DRMS review and be accompanied by an as-built report <br />describing the construction, any problems that were encountered and how they were resolved, any <br />variances from the design that were implemented, the rationale for the variances, and a description of <br />how the variances might affect the performance of the drain. The as-built report must also include <br />and description of geotechnical testing conducted and a tabulation of the test results. Of particular <br />importance to the DRMS review of the as-built report is documentation that the construction adhered <br />to the gradation specification for the drain pipe bedding. <br />2. Continued monitoring and reporting to DRMS of the water table elevation in existing wells for two <br />years after pit backfilling and perimeter drain installation is complete. <br />enclosure(s) <br />cAacs files;\My Documents 4-19-06 duu\speer drain review.docx