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DGMC•, Hesperus, Colorado= Addition to 1998 Annual Repo A B C D E F G 1 2 com liance monitorin water sam le analysis results 3 4 sam ling of under round water at lower ortion of mine emlit area 5 6 base water water 7 line sam le sam le 8 water number" number" 9 analyzed for units ref standard monitorin 97111001 98103001 10 11 Aluminum ug/L E 5000 <104 <50 60 12 Antimon u /L B 6 <5 <5 17 13 Arsenic ug/L A 50 <6 3 3 14 Barium u /L B 1000 46 40 50 15 Be Ilium u /L B 4 <0.1 <0.1 0.2 16 Boron u /L A 750 <22 40 80 17 Cadmium u /L B 5 <0.3 <0.3 <0.3 18 Chromium ug/L A 50 <10 <10 <10 19 Co er u /L E 1000 <10 <70 10 20 C snide m /L B 0.200 0.005 <0.001 0.003 21 Floride m /L B 4 <0.08 <0.05 0.07 22 Gross AI ha +-precision) Ci/L B 15 1.3 +-1.5 1.2 +-1.7 0.2 +-1.5 23 Gross Beta (+-precision Ci/L D 50 0.7~+-3.1 0.0 +_2,9 0.0 +_2.8 24 Hardness as CaCO3 m /I 100 96 98 25 Iron ug/L A 1000 <46 20 10 26 Lead ug/L B 20 <1 <1 <1 27 Manganese ug/L A 1000 <10 <10 <10 28 Mercu u /L B 2 <0.1 <0.1 <0.1 29 Nickel u /L B 100 <20 20 <20 30 Nitrate+Nitrite as N m /L A 10 <0.37 0.71 1.91 31 H units A 6.5-9.0 7.87 7.86 6.78 32 Selenium ug/L A 10 <5 <5 <5 33 Silver ug/L B 50 0.3 4.6 <0.2 34 Sulfate as SO4 mg/L A 250 84 2.7 24 35 Thallium u /L B 2 <1 <1 <7 36 Uranium u /L <3 <2 <2 37 Vanadium u /L E 100 <10 10 20 38 Zinc u /L E 2000 <10 <10 <10 39 40 41 ' ref A =Numeric Standards for San Juan River Basin, a e 8 42 ' ref B =The Basic Standards for Groundwater 3.11.0, a e 22 43 ' ref C =Numeric Standards for San Juan River Basin, a e 3 44 ' ref D =Colorado Prima Drinkin Water Re ulations, a e 47 45 ' ref E =The Basic Standards for Groundwater 3.11.0, a e 23 46 47 48 49 "=water sam le number consistin of 8 di its, with 50 di its 1 8 2 indicating the ear, 51 di its 3 8 4 indicatin the month 52 digits 5 8 6 indicatin the da , 53 di its 7 & 8 indicatin sam le taken that date dmg 5 \dmg 2H1/1999 985 R