REP00919

• Permit No: C1980006
• IBM Index Class Name: Report
• Doc Date: 1/12/1999
• Doc Name: 1998 ANNUAL HYDROLOGY REPORT 1 OF 2 PN C-80-006
• Annual Report Year: 1998
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

' fanuarv 1999 h'err Coal Company " 1998 .inmw(Hvdro(o¢v Report "CO Permit IVo. G80~006 ~ Pa¢e 17
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TABLE 7
HISTORIC LOADOUT AREA ALLUVIAL WATER QUALITY DATA
SITE AP-2
Parameters 1994 1995"' 1996 1997 1998
Temp 1°CI 10 7.3 10.0 10.6 12.5
pH Isul 7.7 7.7 7.6 7.9 7.8
E.C. lµmhos/cml @ 20°C 457 567 517 571 517
TDS 332 589 467 373 333
SAR lin water) 1.07 3.58 1.72 1.01 0.82
Calcium Idissolvedl 53 44 57.6 54.6 53.8
Sodium Idissolvedl 41 121 68.8 38.9 31.7
Ma nesium Idissolvedl 36 34 40.5 36.8 36.7
Potassium Idissolvedl 2 3 2.2 1.8 2.8
Sulfate 34 92 50.7 40 30
Chloride 5 10 10 7 9
Carbonate las CaC031 0 4 <2 <2 <2
Bicarbonate las CaC031 328 438 431.5 320 294
Fluoride 0.4 0.3 0.45 0.4 0.37
Nitrate-Nitro en Idissolvedl 0.03 0.08 0.2 0.03 0.02
Iron Idissolvedl 0.03 0.59 0.30 0.10 0.13
Man anese Idissolvedl 0.55 0.31 0.79 0.56 0.29
Aluminum Idissolvedl <0.05 0.22 <0.02 <0.03 <0.03
Barium (dissolved) 0.12 0.20 0.1 5 0.12 0.13
Boron Idissolvedl 0.06 0.08 0.06 0.05 0.05
Cadmium Idissolvedl <0.005 <0.005 <0.003 <0.003 <0.003
Chromium Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01
Copper Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01
Lead Idissolvedl <0.02 <0.02 <0.02 <0.2 <0.04
Mercury Idissolvedl <0.0002 <0.0002 <0.0002 <0.0002 <0.0002
Molybdenum Idissolvedl <0.01 <0.01 <0.01 <0.01 <0.01
Nickel )dissolved) <0.02 <0.02 <0.01 <0.01 <0.01
Phosphorus lortho dissolved) 0.03 0.05 0.47• 0.01 <0.005
Vanadium Idissolvedl <0.01 0.02 0.005 <0.005 <0.005
Notes: All values in mg/I unless otherwise noted.
All values represent mean annual values.
'Indicates the mean includes a result from the sample collected 10/17/95 which is
anomalous based on comparison with prior and subsequent samples.
"'The means include data from a sample collected on 5/3/95 which contains anomalous
values for many parameters based on com arison with prior and subse uent samples.
Montgomery Wauors • P.O. Box 774018 ' Steamboat Sprirsgt, Colorado 80477 • (970f 879-6260
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