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Memo to GreQ~ Sguire -2- May 24, 2002 <br />3. Since the Applicant is a municipality, no Financial Warranty will be required for the issuance of <br />this reclamation permit hence no risk of under bonding will occur if the bazrier wall as constructed <br />fails to meet performance standazds established by the OSB. <br />However, the DMG does suggest that the Applicant consider additional evaluation of the permeability <br />of the Soil-Cement-Bentonite backfill prior to full scale backfill mix preparation and placement. The <br />use of slag cement and attapulgite in the backfill mix may result in lower permeability than the mix <br />containing just Portland cement described in the Applicant's submittal. <br />Finally, the Applicant must commit or the DMG must stipulate that any substantive changes to the <br />designs, specifications, or quality control plan presented in the May 13, 2002 submittal must be <br />reviewed and approved by the DMG prior to implementation. <br />cc: Carl Mount, DMG (via facsimile transmission) <br />c:1My Documentsl2S°i Avenue Pi[ 2.doc <br />