2013-12-31_REPORT - C1982057

• Permit No: C1982057
• IBM Index Class Name: REPORT
• Doc Date: 12/31/2013
• Doc Name: 2012 Annual Hydrology Report Review
• From: DRMS
• To: Roy Karo
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

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14. Timely filing of pond
CDRMS regulation
Quarterly pond inspection reports were submitted and
reports
4.05.9(17)
received by the Division within an appropriate timeframe.
15. Content of pond reports
CDRMS regulation
All required information was addressed on quarterly
4.05.9(15)
sediment pond inspection in water year 2012.
16. Sampling frequency of
Appendix 15 -3a, Table 1
Ground water samples are collected from WHAL7 -2, WOV14,
ground water monitoring
of CDRMS mining permit
WW14, WO17, WW17, WWC17, WOV25, WW25, WSOV25,
wells
C- 1982 -057
WSC25, WWCOV25, WWC25, WWCU25 and DCAL -02 on an
annual basis.
17. Parameters to be
Appendix 15 -3a, Table 3
Parameters to be sampled are conductivity (umhos /cm), pH
analyzed in ground water
of CDRMS mining permit
(units), temperature (C), dissolved iron (mg /1), dissolved
samples
C- 1982 -057
manganese (mg /1), dissolved fluoride (mg /1), dissolved nitrate
(mg /1), dissolved nitrite (mg /1), dissolved selenium (ug /1),
dissolved sulfate (mg /1), total suspended solids (mg /1), and
total dissolved solids (mg /1). All parameters were met.
18. Basic Standards for
CWQCC regulations 41.4
The Seneca II -W Mine did not generate significant amount of
Ground Water
and 41.5
Ieachates in 2012. Four groundwater wells exceeded the
manganese standard (0.2 mg /1) in 2012. As mentioned in the
above item number 8 above, in soils with a high pH a
standard of 10 mg /I would be more appropriate than the .2
mg /1. In 2012 none the Seneca II -W wells displayed a value
higher than 2.02 mg /1. Three groundwater wells excceded
the iron standard (5.0 mg /1) in 2012, including well DCAL -02.
The pH standard (6.5 — 8.5) was excceded at three sites.
19. Restoration of ground
CDRMS regulation
For the 2012 water year, water levels at all wells fell within
water recharge to
4.05.12(3)
their historic ranges, with the following exceptions. Wadge
approximate pre- mining rate
overburden well WOV25 displayed the highest water level on
record with Wadge coal well WW25 having its lowest water
level on record. All alluvial wells displayed seasonal water
level fluctuations in response to periods of precipitation
recharge.
20. Prevention of adverse
CDRMS regulation
Compliance with the Basic Standards for ground water, as in
impacts to ground water
4.05.11(1)
item 10, indicates the permittee is preventing adverse
systems outside permit area
impacts to ground water quality outside the permit area.
Monitoring data indicate the permittee is preventing impacts
to water quantity outside the permit area. Hydrology reports
indicate that a water level at all wells fell within their historic
ranges with the exceptions identified in item 19. All alluvial
wells showed seasonal water level fluctuations in response to
periods of precipitation or lack thereof. Overburden and coal
well water levels are fluctuating in response to the
precipitation recharge and ground water flow from the
reclaimed mine pits.
21. Prevention of impacts to
CDRMS regulation
No material damage has occurred, as discussed in item 20,
ground water that adversely
4.05.11(2)
above.
impact post- mining land use