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. Mr. Mike Galloway <br />June 17, 1991 <br />Page 3 <br />In order to accommodate equipment traffic for placement and removal of the <br />refuse, the low-permeability layer should be covered with a layer of gravel. <br />A two-foot thick layer is shown in Figure 1. Refuse could be used for this <br />gravel layer, if it is relatively clean and durable. <br />The facility layout shows a perimeter berm, using the same low-permeability <br />materials as the base. This will isolate waters collected inside the facility <br />from areas outside of the facility. <br />The facility design described above has been prepared to a level of detail for <br />Permit Stipulation No. 20. Additional detail for construction of the facility <br />may be added based an actual grades of the terraced site area and the <br />availability low-permeability soils and gravel. <br />If you have questions concerning the information in this letter, please call me. <br />Yours sincerely, <br />WATER, WASTE 8 LAND, INC. <br />~~~ <br />Clint Strachan, P.E. <br />Manager, Geotechnical/Mining Division <br />Attachment * `s~ 1 y:~UL we <br />N~ <br />q <br />%4,'i;~ OF <br />