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of the filter pack. The sand should extend to at least 6inches, but no more than 12 inches, <br /> above the top of the well screen. <br /> 5. Typically a minimum one to two foot thick layer of bentonite pellets is placed above the sand <br /> filter and then a bentonite/cement grout used to the surface. <br /> 6. The stickup and protective casing requirements for each well will be provided per the owner's <br /> specification. <br /> 7. A representative of Buckhorn Geotech, Inc. must be present during well installation to <br /> document as-built conditions, and to provide recommendations for variations that may be <br /> required due to unforeseen subsurface conditions, etc. <br /> Revenue Mine TR-03 Appendix 15 Page 4 <br />