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There is no agriculture to speak of in this area. Beside the fact the ground is steep, semi-arid, and barren the County <br />• does not have any Agricultural Zoning in this region. <br />r? <br />6.4.20(9)(b) <br />Baseline groundwater quality has been established by sampling the drainage from the Big 5 Tunnel. This analysis is <br />included in the appendix of Exhibit C. A current lab analysis, along with the EPA analysis done in 2005 titled <br />"Explanation of Significant Differences Big Five Tunnel Discharge, Table 1.0", shows a reasonable extrapolation of <br />baseline quality. <br />TABLE 1.0 ANALYTICAL SUMMARY TABLE BIG FIVE DISCHARGE SAMPLES <br />Metals coocentrations eVreased in micrograms/Liter <br />Sampling Event As Cd CO a Rg Ma Pb Z.n <br />1981 Ph*" I RI 10 48 1710 NAP 19,700 91 9770 <br />19&9 Pkase H RI 10 27 690 NAF 18,800 B 9100 <br />2001 CWHE NAT 24 1500 NAP 32,200 NAF 9160 <br />2WUUSO, 2 20 2960 (it 19,300 16 1610 <br />rialcin Water MC 14 5 - 2 ` <br />LAA lnldn W2ter MCL <br />Secondary MCI. <br />j <br />Life ! C W <br />East <br /> <br />5 <br /> <br />O N3 1300 <br />loo <br />517 - <br />- <br />0 01 - <br />so <br />1400/142 15 <br />- <br />dIl - <br /> <br />4T/Z00 <br />NAF - Not Analyzed For <br />MCI,- Martmnm Contaminant Level <br />MCLG -Maaiansm Contaminant Level Gaal <br />NBC - No Weet Coneentratioats ate metal concentrations st vshtek aqua& life does not suffer any toxic effects <br />(1) UOS - START contractor for EPA's Emergency Response Team <br />(2) WQCD -1?qu* standards for Clear Creek Sepoent 2 <br />6.4.20(10)(a)(i) <br />There are no Designated Chemicals to be used in this operation. Refer to Exhibit C, 6.3.3(2)(x) for a list of non- <br />designated chemicals to be used. There is also a complete collection of MSDS for these chemicals at the end of <br />Exhibit C. <br />There are no hydrometallnrgical or leaching processes proposed as part of this operation, only gravity and flotation <br />concentration methods. <br />6.4.20(10)(a)(ii) <br />The stormwater management design has been performed by a CO licensed professional engineer. See this design in <br />Exhibit C and Exhibit E. A SWMP permit has been applied for with the CO WQCD. <br />6.4.20(10)(a)(iii) <br />The stormwater management design has been performed by a CO licensed professional engineer. See this design in <br />Exhibit C and Exhibit E. A SWAP permit has been applied for with the CO WQCD. <br />• A Colorado Discharge Permit is not required because there is zero process water discharge to surface waters and the <br />process water is nearly 100% recycled back to the mill. <br />Page 25 of 31