_REVISION - M1988112 (4) - Laserfiche WebLink

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hydrologic gradient is established and until other down-gradient monitor wells are installed. 3. Chain of custody should begin with the commercial laboratory that prepares the sample containers for field sampling personnel. Third party samplers and vendors should supply all collection devices, sample containers, and reagents including wash solutions. 4. Free cyanide in the form of cyanide gas is, of course, a hazard to breathing, particularly in closed spaces. According to MSHA personnel, in some settings, wind may cause high concentrations of cyanide gas to be introduced to persons or animals. However, in many outdoor settings, the gas may be dispersed to a 1@vel that would be considered non-toxic. Free cyanide in solution or any of the weak acid dissociable cyanide compounds may also be hazardous if consumed. Animals, in particular, need to be protected from the hazards of drinking water containing HCN. Battle Mountain has raised the issue of the difficulty of analyzing far free cyanide, and although we have yet to receive real proof of the accuracy of thCse statements, the Division is inclined to believe that the statements bear some co~Asideration. Battle Mountain Gold (and the Division) should consider the utility dnd practicality of analyzing for free cyanide. WAD cyanide analyses should includC both the free and weak acid dissociable components of cyanide, and thus a single analysis may be more reasonable for both analytical and regulatory purposes. 5. Battle Mountain Gold (and the Division) should consider the time after which third- party sampling will be either eliminated or reduced to oversight-type frequencies. 6. The Division does not understand the utility of not measuring major cations for water quality (Table 4). At a minimum, BMG should explain why major Cations are not to be analyzed. 7. Appendix D is essentially indecipherable without a code sheet tp describe the headings. BMG should provide an explanation of the headings and ap~y abbreviated information in [his appendix. 8. Please indicate the source of Appendix D, Appendix F, and Appendfix G. 9. In this protocol as in any, the operators should recognize that analytical labs need to be checked periodically and to do so requires an established procedure. Battle Mountain should have samples with known quantities of analytes and should submit these periodically for analysis along with other analyses. In additiom, the operator should prepare samples for "Round Robin" analyses, infra-laboratory comparisons, and routine sample duplication. Except for some provision for field duplications,