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February 14, 2013 <br />Gold Hill Mines, Inc. <br />P.O. Box 1523 <br />Longmont, Colorado 80502 <br />(303) 651 -2985 <br />Colorado Division of Reclamation, Mining & Safety <br />Mr. Michael A. Cunningham 0 <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 2012 <br />Cash and Who Do Mines, Permit No. M1983 -141: <br />Recl: <br />& 4 <br />Re: Technical Revision - Water Monitoring Locations and Sample Parameters <br />Dear Mr. Cunningham, <br />Numerous water monitoring parameters have been analyzed in the past several decades <br />that have been below minimum detectable limit (MDL), or are of questionable value in <br />evaluating the water quality associated with the Cash Mine. Because of this history, Gold <br />Hill Mines, Inc. is requesting a revision of the water monitoring requirements for this <br />permit. <br />For the purpose of water quality analysis and in order to detect any increases in these <br />elements in the water, I am requesting that the following elements be sampled: the <br />dissolved metals of Arsenic, Cadmium, Chromium, Copper, Iron, Lead, Manganese, <br />Selenium, and Zinc, plus pH, TDS, temperature, and conductivity at all surface and <br />groundwater sampling locations. <br />We are requesting the elimination of the following water samples: <br />(CW) Cash Well -- This well draws water from the Seventh Level in the Cash Mine <br />and it is not representative of the mine water found on the Third Level, where the <br />Cross -cut accesses the mine workings. The pump in this well is currently without <br />power and it is not operable, so no water samples can be obtained from this <br />source. This water well has been used to dewater the Cash Mine by previous <br />operators, and its use has been discontinued by the current permitted operator. <br />Before it is placed back in operation, the operator will notify the DRMS. <br />(CG) Cash Gulch -- This is an intermittent stream, and the sampling location is dry <br />most of the year. Since no water from the Cash Mine is flowing into Cash Gulch <br />from the Third Level Cross -cut, and it is not affected by any mining operations, <br />there is no reason to continue sampling this location R ECEI �re <br />rER 15 2012 <br />