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- • ~ i <br />~ ROCKY MOUNTAIN CONSULTANTS, INC. ~~~ <br />Premiere Building <br />825 Delaware Avenue, Suite 500 <br />Longmont, Colorado 80501 <br />Metro (303) 665-6283 <br />October 10, 1999 <br />E-mail bmarsh811@long.rmcco.com <br />Ms. Lori Potter <br />Kelly/Haglund/Garnsey & Kahn <br />1441 18th Street, Suite 300 <br />Denver, Colorado 80202-1255 <br />RE: Review of August 1999 Battle Mountain Resources, Inc. "Technical Review Cpmment Response, <br />TR-26 Water Management Plan in the West Pit Area, San Luis Pr%ect, Cosfill~ Counfy, <br />Colorado" and the DMG's September 15, 1999 Review of BMRI's Response <br />Dear Lori: <br />Rocky Mountain Consultants, Inc. (RMC) has reviewed the August 1999 Ba[tle Mountaln Resources, Inc. <br />(BMRp document entitled "Technical Review Comment Response, TR-26 Water Management Plan in the <br />West Pit Area, San Luis Project, Costilla County, Colorado." Our comments on this document are <br />provided below. <br />PROPOSED EVAPORATION SYSTEM <br />Paze 2, Response to Comment No. 5 <br />Please provide a map illustrating the location of the proposed discharge point. <br />PASSIVE TREATMENT SYSTEM <br />Paae 5, Response to Comment No. 5 <br />This response states that one or two piezometers will be installed in the Pink Gneiss Pid for the Pilot Test. <br />However, Attachment B is not as definitive on the piezometer installation, stating that the decision to <br />install additional monitoring wells won't be made until after the test has begun (see paf~e 5 of the Pilot <br />Test Work Plan). RMC believes that more than one or two wells are required to provide sufficient <br />transport data to evaluate the performance of the pilot test program. We recommend installing eight <br />monitoring wells in the Pink Gneiss Pit. Two sets of three nested wells should be installed down gradient <br />of the injection point. The nests should have a shallow well, an intermediate well, andl a deep well, each <br />well having afive-foot screen. The second well nest should be located at a distance of twice that from <br />CIVIL AND ENVIRONMENTAL ENGINEERING • PLANNING <br />