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<br />1.0 INTRODUCTION <br />' Battle Mountain Resources Inc. (BMRI) extracted and beneficiated precious metal at the San <br />Luis Mine Project from January 1991 to November 1996 under permit M-88-112 from the <br />Colorado Division of Minerals and Geology (CDMG). Mining and beneficiation activities took <br />' place approximately four miles northeast of the town of San Luis in Costilla County, Colorado. <br />Since the termination of mining and beneficiation activities at the San Luis site, BMRI has been <br />' conducting surface land reclamation and closure-related surface and ground waiter monitoring. <br />All lands utilized by the project are privately owned. <br />Ore extracted from [he surface mine facilities were beneficiated through acarbon-in-leach (CIL) <br />circuit to recover the precious metal concentrations. The tailings material generated from the <br />' mill/CIL circuit were deposited in a composite-lined tailings disposal facility (TDF). The <br />mill/CIL circuit was designed and operated to provide containment and collection of any spills <br />within the facility operations. The TDF was designed and is managed as azero-discharge facility <br />curtaining water from the CIL circuit and stomrwater flows from the Probable Maximum <br />Precipitation (PMP) storni event. <br />IJ <br /> <br /> <br />1 <br /> <br /> <br /> <br />I <br /> <br />Since the termination of operations at these facilities in 1997, all chemical reagents and <br />beneficiation solutions associated with these facilities have been either removed fu'om the site or <br />chemically neutralized and placed in the TDF for final disposal in accordance with <br />reclamation/closurep1ans authorized and approved in the CDMG permit. <br />In July 1998, closure-related groundwater monitoring identified an exceedapce of permit <br />condition values at a West Pit monitoring well (M-11R) which resulted in the development of <br />Technical Revision (TR) 26 in accordance and compliance with the CDMG permit. Subsequent <br />to the development of TR-026 and further investigation and remediation actions associated with <br />the groundwater exceedance, BMRI has implemented measures for the constn/ction and <br />operation of an active water treatment facility to treat groundwater in the vicinity of the West Pit <br />at the San Luis Project. This revision to the 1995 Emergency Response P(rm has been prepared <br />to transition emergency planning and chemical storage and use protocols from the <br />mining/beneficiation operations detailed in the 1995 plan to that associated with the operation of <br />the active water h'eatment facility. Therefore, mill/CIL facility descriptions and operational <br />Bnnle Muuremin Resourrrs, lnr. Shcphrrd Millrr L[r. <br />p+100_6Trt~']vpp nnP~smi luizanereencv«sponse plan rn'I-JI-00: doc I OcrnGer?8,1911 <br />/Reviser! Jmuuirr 3/. 1000) <br />