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GROUND WATER MONITORING /•~ SOMERS!•:T COAL MINl•: EC - 1 Samule Uate• 4-15-81 5-19-81 7-15-81 1-19-82 4-20-82 Aluminum as Al mg/1 .790 .200 .003 , 150 .035 Anununia ae NH3-N mg/1 c . 01 < , O1 . 12 . 19 . 36 Arsenic as Aa ~-~g/1 ,001 <.001 .001 <,001 <,001 Barium as Ba tng/1 .030 .030 .035 , 060 .060 Bicarbonate au HC03 mg/1 73, 20 341.60 353, BO 522. 00 412,40 Boron as B mg/1 , 010 .040 .010 .050 .030 (:admium as C:d ir~g/1 <, 001 < .001 <. 001 <, 001 <.001 Calcium as Ca mg/1 5, 60 28.00 20.00 55.0 3T, 50 Carbonate ae C03 mg/1 60.00 36.00 19.20 29.0 <.Ol Chloride as Cl mg/1 20.00 20.00 15.30 3.00 4.80 Chromium ae Cr my/1 <, 001 <. 001 <. 001 <.001 .002 Conductivity umhos/cm 255 800 710 980 810 Copper as C:u Ong/1 <,001 .010 .002 <.001 <,001 Flouride. as N' ing/1 . 35 , 44 , 43 , 47 , 39 Hardness as CaC03 rnl;/1 30.0 150 120 170 160 Iron as Fe (Total) mg/1 1.800 , 240 .250 , 260 1.420 Lead as Pb rrib/1 .001 <. 001 .003 , 010 .002 ~.lYtagneaiuin as 1vt6 mgll ` 5, 76 19. 20 16, 80 18.00 17. 50 anganese as Mn mg/1 .060 .010 .012 .010 .040 rcury as Hg mg/1 .00530 <.00020 <.00020 <.00020 <.00020 ~~.ulybdenum as Mu m~/1 <.001 <,001 <.001 <,001 <.001 Nickel as Ni nag/1 <.001 !.001 <.001 <.001 <.001 Nitrate as N03-N nib/1 .04 <.O1 .28 , 14 . 18 Nitrite as NC2-N mg/1 .03 <.OI <.O1 ,OS ,04 Phosphate ae P04-I' Tut:.l ~~~g/1 .150 .160 .410 , 140 .560 Potassium as 1C nag/1 2, 50 5.80 4, 70 6, 10 2, 90 Sodium as Na mg/1 84.00 142.00 136.00 160.00 140 Sulfate as SU4 mg/L 37, 5 102 78.0 84.0 120 Sulfide ae S Ong/1 . 15 <, O1 . 62 1.65 <. O1 Suspended Solids rtig/1 18.0 5.0 29.0 22.0 252 Selenium C. 001 <.001 <.001 <.001 <,001 Total Combnstabl~ Suticls mt;/1 16.0 1.8 33, 0 233 28.0 Total Dissolved Solids Ong/1 163 • 526 475 635 530 ''/.inc as Gn nig/1 .012 .005 .016 , 008 .005 pH Units 9.60 8.30 8.60 7.90 7.20 2, 04-29i Rev. 3: 9-22-82