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MUUNI KUYALt VtNiUK raiu~ V~µ/bp <br />Mr. Thomas Schreiner <br />Division of Reclamation, Miniurg and Safety <br />Adequacy Review Cornntents TR-OS <br />4nor~ao~ <br />Page 3 of 5 <br />The standards shall apply to each monitoring point. The suite of parameters for which <br />sampling is proposed are those listed in Table 1. Accordingly, MRV believes that it is not <br />necessary to monitor total dissolved solids (TDS), sulfate, and specific conductivity as <br />these parameters are not included within the Agricultural groundwater quality limits as <br />presented in CWQCC; 2005. Regulations No. 41, Table 3. <br />MRV has also proposed to monitor dissolved metal species. The rationale is as follows: <br />1. Groundwater. Groundwater passing through the Boulder Creek Granite that hosts <br />the mine provides provides excellent filtration, which wilt remove any paticutates <br />that might be sourced within the mitre void, or in any sampling well. Dissolved <br />analysis measures the mobile metal and other constituents in the water sample, <br />and is therefore the appropriate measure for this project. <br />2. Surface Water. Surface water iux the vicinity of the Cash Mine is sourced from a <br />mineralized district. Any particulates in the water must come £rom erosion of the <br />surface material, which may well be mineralized. Any water in the surface flow <br />that is sourced in the mine (which is zero discharge) must come through the <br />groundwater flow system, and will therefore not contain any particulates due to <br />the filtration effect. Accordingly, monitoring of the mine's effect on the surface <br />water downgradient should monitor the dissolved metal and other constituents. <br />Each monitoring point will have its specific baseline. The interim baseline for the MW-1 <br />monitoring well was presented in Table 2. Any parameters not specified within the <br />baseline were below detectable limits, therefore Agricultural quality limits would prevail. <br />This baseline shall be modified, following five (S) quarters of baseline data recorded <br />fzom the well post-completion (as proposed). <br />