Laserfiche WebLink
0-IR 1Y SILVER MIAVES <br /> chemicals maybe stored in multiple locations;the Reagent Room currently under <br /> review and the existingReagent Room area within the mill building. The focus of <br /> TR-14 is on the Reagent Buildingto be constructed,while the reagent room of the <br /> mill building was certified under the MillCertification submitted on November 17, <br /> 2015, that certification as a whole has been nullified. If the reagent room of the <br /> mill building is to be used for storage address the following: <br /> a. Clarify the maximum amount of reagents to be stored within the mill <br /> building reagent room. Rule 6.4.21(5) and 6.4.21(6)(b)(i), <br /> b. Their location within mill building reagent room, <br /> c. Provide supporting documentation to ensure the secondary containment <br /> capacity is sufficient for the room as a whole and details regarding any <br /> individual secondary containment structures that prevent possible mixing. <br /> Response: <br /> a. OSMI anticipates that there could be a small amount of chemicals stored in the <br /> old reagent room in the mill filter building. This would be done on an as needed <br /> basis if the chemicals need to be removed from the reagent room for maintenance <br /> or similar activity. The old reagent room would be used as a staging area rather <br /> than storage area. As noted in response to 5.c below, there is sufficient secondary <br /> containment volume in the old reagent room to accommodate chemical storage. <br /> b. The chemicals will be placed just inside of the garage doors that access the old <br /> reagent room. <br /> c. The old reagent room of the mill filter building is roughly 60 z25'and has an 8" <br /> curb for containment,plus a 50-gallon sump. This room has approximately 8,500 <br /> gallons of secondary containment. As noted above, the old reagent room will be <br /> used for temporary staging of chemicals as needed. The chemicals will be placed <br /> on spill pallets to prevent mixing. <br /> 6. Please provide a more detailed explanation of Table 6. <br /> Response: Table 6 was included in response to 2c of the Preliminary Adequacy Review (PAR). <br /> The mine was asked to explicitly state the day use rate of each chemical. The chemicals are <br /> consumed by the amount of ore that is processed in the mill, which fluctuates on a daily basis. <br /> The mine inadvertently did not elaborate on the table in the PAR response. Table 6 was provided <br /> to show the amount of reagent used per short ton of ore processed and the size of the packaging <br /> containers in which the reagents are shipped. <br /> 7. Several of the chemicals are toxic to aquatic life,even the 10%tailings of the 10% <br /> 51Pa � z <br />