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1 <br />K E A P A C I F I C <br />t ~_ <br />Kea Pacific Holdings Incorporoted <br />2555 Edgemont Boulevard <br />North Vancouver, B. C. <br />Canada V7R 2M9 <br />Telephone: 604-984-2524 <br />Fax: 604-984-8426 <br />Battle Mountain Gold Company <br />5670 Greenwold Plaza Boulevard <br />Suite X106 <br />Englewood, CO <br />80711 <br />Attn: Ms. Anne Bafdridoe <br />Dear Madam, <br />February 21, 1994 <br />RE: Geochemical Testing of Tailings Samples. September 1990. <br />San Luis Praiect <br />This letter provides a discussion of the results of the geochemical testing of five samples of <br />tailings taken from the San Luis tailings facility in September 1993, (Care Laboratories <br />(CORE) report ,C 931935/November 10, 19931, as requested in your letter of January 17, <br />1994. This letter is divided into three sections, as follows: <br />• data analysis of static acid generation potential results; <br />• data analysis of tailings porefluid results; and <br />• data analysis of results from USEPA Method 1312 (Synthetic Precipitation <br />Leach Procedure) leach testing. <br />Static Acid Generation Potential Tests <br />The data from the static AGP data given in the CORE data sheets are summarised in Table <br />1, attached, giving total sulphur, pyritic sulphur, AGP (both based on total sulphur and <br />pyritic sulphurs, ANP and ANP/AGP ratio values. Also included in Table 1 are some mean <br />values for each of the parameters. <br />The data from Table 1 indicate the following; <br />• there is little significant variation in the sulphur, sulphide and ANP values in <br />all the samples, with the range of values being relatively smalls; <br />10/03161 <br />