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,~ WATER <br />' i% WASTE <br />& LAND <br />INC. <br />' November 29, 1993 <br />VIA FACSIMILE <br />WWL JJ390 <br />' State of Colorado <br />Division of Minerals and Geology <br />' 1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />' Attention: Larry Oehler <br />Environmental Protection Specialist <br />' Subject: Battle Mountain Resources Inc. -San Luis Mine <br />Weekly Construction Activity UF.~ate - 11/20/93 through 11/24/:33 <br />Dear Larry, <br />Contained in this letter is information concerning WWL's observations of r_onstruction <br />activities and our review of current and past construction quality assurance testinl3 procedures <br />and results. This information was collected over the period from November 20 to November <br />24, 1993. Weather conditions have been conducive to the construction of the embankment <br />and placement of the drainage blanket material. Due to some precipitation, liner patching has <br />' been slow. All snow, for all practical purposes, has melted off the VLDPE liner. <br />' CONSTRUCTION ACTIVITIES <br />During this period, the following activities were conducted: <br />' o Holes and failed seams in the VLDPE were patched and tested, <br />o Construction on the main embankment continued, and <br />' o Placement of Type 2 material continued. <br />These activities are outlined below. <br />' • VLDPE Liner Repair <br />' Holes created in the liner during removal of snow and from other miscellaneous construction <br />activities were identified, patched, and vacuum tested. Serrot Corporation pferformed the <br />patching. At week's end (11/24) Serrot was in the process of patching several seams in the <br />far east portion of the impoundment which had failed during destructive testing. Weather <br />conditions were making patching operations somewhat difficult. <br /> <br />2629 Redwing Rd. Suite 200, Fort Collins, Colorado 80526 <br />(303)226-3535 <br />fax (303) 226-6475 <br />' Consulting Enginerrs and Scientists <br />