PERMFILE46234

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: TAB 07 HYDROLOGIC DESCRIPTION
• Media Type: D
• Archive: No

• fell). 4ell YOV9 exhibits a MpCaXC03 during the fall end Vinter, shifting to e
MpCe504HL03 type during the spring, and a MBCeHC03504 water type during the summer season.
Contrasted with Wedge overburden Yells YOV25 end YOV28, Yells YOV1 end YOV9 typically
feature magnesium instead of calcium es the most influential cation. Yell YOV30
consistently and without seasonal variability exhibits a Na504 water type, which is
anomalous compared to the other four Yedpe overburden wells.
At Yells YOVS and YOY28, total dissolved solids range between 549 and 1262 mg/l, lowest in
the spring end generally increasing slightly in concentration as summer progresses toward
fall. TDS ranges from 702 to 1802 mg/l et Yells YOV1 and YOV9, and generally is highest
in spring, lowering slightly as summer progresses to fall. TDS et YOV30 ranges between
2496 end 3052 mg/l, end has increased since sampling began in December of 1990. Sulfate
concentrations et each of the five overburden wells follow the same seasonal pattern (if
any) es TDS in each, ranging overall from 99 mB/l (YOV25) up to 1737 mg/l at YOV30.
Field pX measurements collected in all five Yadge overburden wells have ranged
considerably from 6.5 to 8.8 S.U. Yells YOV28 and YOV30 have exhibited field pX values
• from 7.1 to 8.5 and from 7.3 to 8.8, respectively. Vedge overburden ground water in both
wells is slightly alkaline. Yell YOV1 pH values have commonly been measured less than 7.0
S.U., and pX values et both YOV9 and YOV25 have ranged from 6.8 up to 7.7 S.U. (YOV9).
xardness as CaC03 has also ranged considerably among the five Wedge overburden wells, es
low es 383 mg/l et YeLI YOV30 up to 1900 mg/l et Yell YOV9. Seasonal variability of
hardness in the Yadge overburden is low, evident in date collected at Vells YOV28 and
YOV30, generally lowering slightly during the spring, end remaining consistent during the
summer through winter. Nardness values greeter then 1000 mg/l at Yell YOV9 (6/B2, b-8/83,
6/93) suggest en opposite seasonal pattern compared to Wells YOV28 and YOV30. Madge
overburden ground water is classified as very hard.
Several trace elements were measured et detectable concentrations in the Vadge overburden,
including Be, 8, F, Fe, Ni, Si, and Zn. Iron has been measured greater then 1.0 mg/l only
at Well TOV1, ranging from 2.11 to 8.69 mg/l since 1991 (two previous USGS measurements of
24 and 39 mg/ l considered unrepresentative). Of the remaining trace constituents, only
silica (USGS monitoring, 198D to 1983) end fluoride in Yell YOV30 have measured at
. concentrations greater than 1 mg/l.
Wedge Coel. Vells YY1B, YY2, YY23, YY28, YY29, YY30, and YY7 ell monitor ground Yater
49 Revised 03/07/95