2019-05-29_PERMIT FILE - M2019031 (7)

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1 t 1 Data* 9/16/2004 11/3/2004 6/9/2005 above below Corkscrew Corkscrew below Corkscrew Analyte Units _project project mouth mouth project mouth Aluminum(D) mg/I 8.1 5.1 9.5 21 2.7 3.3 Arsenic(D) mg/I 0.002 U U 0.0042 na na Cadmium D m /I 0.0014 U _ na 0.003 U U ( )- g Copper(D) mg/I U 0.032 0.11 0.33 0.011 0.15 Iron(D) mg/I 17 6 14 51 1.2 4 Iron(TRec) mg/I 22 6.3 14 63 1.5 5.4 Lead(D) mg/I 0.05 0.005 0.022 0.013 U 0.018 Manganese(D) mg/I 1.7 0.15 1.4 1.7 0.067 0.17 Mercury(D) mg/I U U na U na na Selenium(D) mg/I U U U U U U Silver(D) mg/I U U U U U U Uranium(D) mg/I U U U 0.001 na na Zinc(D) mg/I 1.1 0.057 0.74 0.84 0.024 0.13 pH unit 3.57 3.19 3.22 3.44 4.7 4.83 Conductivity umho/cm 840 369 759 1022 242 295 Alkalinity,total mg/I U 57 U U U Hardness,Ca, Mg mg/I 300 18 190 160 15 36 Total dissolved solids mg/I 680 220 580 740 na na Total suspended solids mg/I 72 U U 360 na na Ammonia-nitrogen mg/I 0.08 0.07 0.08 0.1 0.03 0.06 Chloride mg/I na na na 2.9 na na Dissolved oxygen(DO) mg/I 8.62 7.53 7.49 10.23 8.75 12.01 Escherichia coli #/100m1 U U na 0 0 0 Fluoride,dissolved mg/I na na na 1.1 na na Inorganic nitrogen mg/I U U U U U U Kjeldahl nitrogen mg/I U U U U U U Phosphate-phosphorus as P mg/I 0.13 0.089 0.091 0.29 0.028 0.023 Sulfate as SO4 mg/I 480 54 370 550 50 73 Temperature,air deg C 13.5 12.7 21.1 3.8 7.06 3.4 Temperature,water deg C 5.04 9.83 13.21 -0.24 na na Groundwater Resources No water discharges have been observed from the numerous historic mine workings on the east flank of Red Mountain No. 2. The nearest and most analogous mine workings are located on U.S. Forest Service land at approximately the same elevation,500 feet to the north of the proposed Von Doose drift. The similar scale,parallel historic workings consist of a series of drifts and stopes that intersect what AMR believes to be the same structure that it intends to explore. No groundwater is encountered in the historic workings, no seeps or springs occur anywhere near or above the project area,and there are no intermittent or perennial creeks in close proximity to the proposed underground operations. Based on these observations, the local water table is inferred to be approximately the equivalent elevation of Corkscrew Gulch,which is 540 feet away from and 200 feet lower in elevation than the nearest proposed underground operations. The closest well is located approximately 1.9 miles from the permit boundary. It is associated with the Red Mountain Lodge at the top of Red Mountain Pass. It is located on the far western flank of Red Mountain No.3 at the valley bottom near a small pond on the divide between Red Mountain Creek and Mineral Creek which flows into San Juan County. Depth to water is 36 feet and it yields 10 gallons per minute. Page 6 of 7