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Friday, February 16, 1996 <br />James C. Stevens <br />State of Colorado <br />Division of Minerals and Geology <br />Department of Natural Resource <br />1313 Sherman St., Rm. 215 <br />Denver, CO 80203 <br />q'cn <br />~~•sro FF9 76 /I ~~~ <br />~o,MnP ~yy6 <br />~d~6 <br />a <br />GNO°9 <br />.{' <br />Dear Mr. Stevens: <br />yl ~D <br />Thank you for taking time to meet with Mr. Faliskie and myself yesterday. To summarize Pj~ <br />some of the points which we discussed, Greystone staff will be surveying the pit and well <br />locations using an arbitrary bench mark established on site rather than a USGS bench Y~0 <br />mark. Secondly, the geophysical logs will be replaced by an enhanced method of well ~K <br />logging so that lithologic information of individual wells may be correlated. Lastly, the CGS <br />analytical testing parameters to be used include; Table 1, (less asbestos) and Table 2 ,o <br />Secondary Drinking Water Standard as identified in the Colorado Department of Health ~~Ly <br />"The Basic Standards for Ground Water" 3.11.0 March 2, 1995. <br />]n place of the organic compounds listed in "The Basic Standards for Ground Water", <br />Greystone will utilize EPA methods 624, 625, 608 and SW-846, 8150. All of the analytes <br />from Tables 1 and 2, plus organic compounds, are attached and include the method <br />reporting limits. As discussed during our conversation, the total coliform analysis has a <br />six hour holding time. Given the particular location of the site, it is quite likely that the <br />holding time for this test will be exceeded. Should this become a test of particular <br />significance, steps to over come the holding time difficulty will be addressed. <br />Greystone appreciates the assistance of the Division of Minerals and Geology with this <br />project. Should your require any additional information, please don't hesitate to contact <br />me at 850-0930. <br />Sincerely, <br />Greys tone <br />J frey Spinzig <br />Managing Director, <br />Site Assessment Group <br />CC: Robert Vasquez, Costilla County <br />5990 Greenwood Plaza Blvd. Suite 250 Englewood, CO 80111 <br />(303) 850-0930 Fax (303) 721-9298 <br />