PERMFILE64153

• Permit No: C1980005A
• IBM Index Class Name: Permit File
• Doc Date: 6/29/2007
• Doc Name: pg 7-300 to 7-388
• Section_Exhibit Name: Tab 7 Hydrology Part 3
• Media Type: D
• Archive: Yes

state Rea.
while average Z9.S values at wells 46-A arri 69-A were 2365 aryl 3395 •
mg/1, respectively. Z9.S concentrations have been increasing since
well 68-A was first sampled in 1988.
Sboils Aquifer. Peabody currently monitors spoils aquifer water
chc-~istsy at five wells: 25-5, 26-5, 27-5, 61-5, and 62-5. Water
samples Collected frc~ the spoils aquifer have historically, as well
as during water year 1991, displayed a CaMg-504 or MyCa-S04 water
type.
Wells 25-5, 26-5 and 27-5 monitor the spoils upgradient fran the
Wadge T~~~*+t. Well 25-S has had insufficient water for sampling
in recent years. Water samples fry well 26-5 have the highest TDS
concentrations of all the spoils wells monitored, and 'IDS levels have
been increasing since this well was first sampled in 1981. Although
well 27-5 is dodngradient of 26-5, lower TDS concentrations are seen
at this site, possibly due to the dilution effects of water from the
Wadge 7i~cxurLmnt. •
~?, Well 61-5 monitors the spoils aquifer in the Spring Creek area, south
of the Wadge Impourr3tnent. 7.D6 levels at this site declined slightly
during water year 1991 with an average 7.D5 of 3658 mg/1. Water
quality at well 62-S, which monitors the spoils aquifer near PorYl
004, is similar to 61-5, although 'iAR concentrations have been
increasing at this site since it was first sampled in 1988.
Leru~ox-Wadae Interburden Aquifer. 7.Wo wells are currently used to
monitor the Lezu~ox-Wadge Interburden aquifer, wells 21 IWI and
42-P1-LWI, although 42P1-LWI did not have sufficient water to sample
during water year 1991.
Water samples collected at 2~IWI have a CaMg-SO4H~3 water type.
7.US concentrations have declined at this site since a peak value of
2960 mg/1 was measiu~ed in 1984. •
Wadge Coal Aquifer. Water quality of the Wadge Coal aquifer is
7-315 Revised 12/10/92