2014-01-09_REPORT - C1981010

• Permit No: C1981010
• IBM Index Class Name: REPORT
• Doc Date: 1/9/2014
• Doc Name: 2012 Annual Hydrology Report Review
• From: DRMS
• To: Trapper Mining, Inc
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JLE
• Email Name: SB1
• Media Type: D
• Archive: No

Requirement
Regulation
Reviewed
Comment
N. Timely filing of
CDRMS
pond reports
regulation
Yes
4.05. 9(17)
O. Content of pond
CDRMS
regulation
Yes
reports
4.05. 9(17)
Several issues were identified with the monitoring
frequency:
• For well J -1, water elevations table was not
submitted, Figure A -11 of Appendix A of the 2012
P. Sampling
Table 4.8 -13a
AHR indicates this well is dry. However water
frequency of
of CDRMS
quality sampling data was submitted for this well.
groundwater
mining
Comment
It is unclear how a water sample could be taken if
monitoring wells
permit C -81-
the well was dry.
010
• Ground water quality data was not submitted for
wells P -3 or P -5 for 2012. Data through June 2005
and June 2011 was submitted for wells P -3 and P -5
respectively.
Several issues were identified with the parameters
analyzed:
Table 4.8 -13
• Manganese, aluminum and chromium were not
Q. Parameters to be
of CDRMS
reported for the 2nd quarter in accordance with the
analyzed in
mining
Comment
approved monitoring schedule for well GF -4.
groundwater
er
permit C -81-
p per
• Aluminum and chromium were not reported for
samples
the 2nd quarter in accordance with the approved
monitoring schedule for wells GF -5, GF -7 and
GMP -1.
Based on previous analysis by DRMS staff, the Third White
Sandstone aquifer is the only bedrock stratigraphic unit
having significant permeability that is in the groundwater
flow path of any coal spoil leachate; therefore, the Third
White Sandstone is the only bedrock stratigraphic unit whose
ground water quality may be negatively impacted by mining
at Trapper. Well GP -9 monitors the Third White Sandstone
immediately downgradient from Trapper's pits at a location
where a leachate plume can be expected to form, as
explained in the PHC (Section 4.83 of the permit). Well GP-
CWQCC
9 is Trapper's ground water point of compliance for the Third
R. Basic Standards
regulations
Comment
White Sandstone as explained on permit page 4 -242. In
for Ground Water
41.4 and 41.5
general, the 2012 data from well GP -9 does not exceed Basic
Standards for Ground Water for a domestic use
classification. (This classification is for the Third White
Sandstone in a Specified Area that extends outward from
Trapper's northern permit boundary on the east half of the
mine to the axis of the Big Bottom Syncline, a distance
ranging between 1/2 and 314 mile from the boundary.) There
are exceedances of drinking water standards for Fe and Mn;
however, Fe and Mn exceedances also occurred in GP -9
prior to mining in the area upgradient of this well.
Furthermore, other hydrogeologic and water quality factors
(e.g., concentrations of TDS and sulfate) indicate that coal
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