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BRTTLE MTN. GOLD SL ID~719-672-3363 <br />RATTLE MOUNTAIN RESOURCES, INC. <br />MRR 29'93 1~~36 No .007 P.02 <br />March 29, 1993 <br />Mr. Larry Oehler <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Battle Mountain Resources, Inc. <br />DMG Permit No. M-88-112, TR-010 <br />Weekly Pond Compliance Report - <br />Dear Mr. Oehler: <br />6~OlD C0 <br />- San Luis Project <br />March 21-27, 1993 <br />Attached is a summary of the daily on-site Cyanide apalysis <br />performed on samples from the active pond and the collection <br />pond during the week of March 21-27, 1993 as required by the <br />approved TR-010. This letter also serves as a follow-up <br />discussion to the March 29 message that I recorded on yj!our <br />voice mail. tG/ J'r off ~:^1l~. a ,..«.f1 ~ ~~ ((~' 'x <br />uFy'r/-- ni / rParh,a+r~j c.. t IL(t "f•~f K~-~'f~ arrY /~if'.7 <br />During the week of March 21-27, the active (lower) pond <br />averaged 2.94 ppm CN-wad and 5.06 ppm CN-total. The <br />collection pond averaged 1.08 ppm CN-wad and 1.55 ppm CN- <br />total. The weekly sample of the inactive (upper) pond, <br />collected on March 24, showed 2.96 ppm CN-wad and <br />3.87 ppm CN-total. <br />on March ze, a concern on the routing of overflow material <br />from the cyanide mix tank was identified. The overflopw from <br />the mix tank was directed to the grinding area sump, then to <br />tailings pump box, and finally to the tailings disposal area. <br />The control valve on the make-up water line into the cyanide <br />mix tank malfunctioned. An estimated 3 tank volumes x(8600 J, / (~j/, <br />gallons) containing a maximum of 6,000 pounds of sodium - , <br />cyanide overflowed from the mix tank and reported to the , <br />tailings disposal area. The control valve on the water line <br />to the cyanide mix tank has bean repaired. Overflow inateriall•-~~ <br />from the cyanide mix tank has been re-plumbed and is pow ~e~~<~/ <br />directed to the leach circuit sumps where the material will bef~,,, r <br />placed back into the milling process rather than sent to the ~` <br />tailings disposal area. f~~~r~ <br />~'~ ~.a~..~, <br />with the overflow material entering the tailings disposal ~ <br />area, the cyanide concentrations in the active pond increased ~<yyf,~~~ <br />The highest concentration was reported on March 27 with <br />values of 6.97 ppm CN-wad and 9.49 ppm CN-total. Sy March 283 <br />the cyanide levels had decreased to 4.33 ppm CN-wad ai9d 8.G7 <br />ppm CN-total. The levels appear to be decreasing. As ''~"~ <br /> <br />A SI/RS((1/ART 11F' RA7il,(i MOUNTAIN GOL[~ CONYANY <br />1'.(]. H(1X .11U SAN I.III$,COIAHAW 111172-0JIU (714)672.376'_ 1'AX 171Y)672-7367 <br />~u <br />i <br />