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

CaNgHC03504. The trilinear and Schoeller plots show minimal cation and measurable anion
scatter with no overall trends. A majority of the cation scatter is due to Mg and Ca •
variability. A review of the plots and the meq/l table in Appendix 7-7 suggests the
8/10/92 C03 value, the 4/21/93 Cl value, end the 10/14/92 S04 ere all suspiciously high in
comparison to the remaining concentrations. The remaining anion scatter appears to be
mostly a function of HC03 variability and to a lesser extent, S04 variability. TDS does
not appear to show any overall trend.
The seasonal trilinear end Schoeller plots show the mean spring Ca, Mg, end Na levels ere
lower than the summer end fell levels, which are fairly comparable. Mean spring 504 end
HC03 concentrations ere lower than summer and fall concentrations. There is measurable
difference in the mean 504 levels for each season, whereas summer end fall HC03 levels are
comparable. Mean TDS Levels ere lowest in the spring and increase through the summer and
fall.
The pH levels for ell the samples range from neutral to moderately alkaline. The pN
trends towards more alkaline conditons from spring to fell. The mean TDS is 40 pe re ent
higher than that measured et upstream Site YSS1 in the early 1980s. Excepting Al, Ba, B,

M
F
d 2
f
h
l
h
i
f
h
l
d •
e,
n, en
n, a major
ty o
ues
t
e va
or t
e ot
er s are censor
ten trace meta e
. As
and Se are uncensored in the spring and summer, but not in the fall. Pb, Hg, and Mo ere
only uncensored in the cpring. How much these seasonal values are effected by suspended
solids (55) differences is difficult to say. The spring SS range is the highest. The
value of 110 ug/l for Cu on 5/14/92 appears to be a laboratory error.
Site Y552 (see Exhibit 7-1) has been monitored from 1/28/81 through 10/4/93 by the USGS
and from 5/1/91 through 10/14/93 by Peabody. Five water types ere exhibited at Site Y552,
CaNBHC03504, which is the principal water type, CawgHC03, MyCaHC03 SO4, CeMBSO4XC03, end
MBCa504HC03. The principal water type accounts for 76 percent of all the water quality
analyses. The trilinear end Schoeller plots show some cation scatter and considerable
anion scatter with no overall trends. A majority of the ration statter is due [o Mg and
Ce variability end a majority of the en(on scatter is due to HC03 and S04 variability.
The 8/10/92 C03 value end the 10/14/92 S04 value ere suspiciously high in comparison to
the rest of the values for the two respective enalytes. TDS does not show any overall
trend. Mean TDS levels have inereesed approximately 100 mg/t es compered to the nearest
upatreem Site TSSF3. •
The seasonal trilinear end Schoeller plots show mean spring Ca levels ere slightly higher
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