2012-09-19_REPORT - C1992081

• Permit No: C1992081
• IBM Index Class Name: Report
• Doc Date: 9/19/2012
• Doc Name: 2011 AHR DRMS Review
• From: DRMS
• To: Dennis Jones Hayden Gulch Terminal, Inc. Peabody Energy
• Annual Report Year: 2011
• Permit Index Doc Type: Hydrology Report
• Email Name: JLE
• Email Name: SB1
• Media Type: D
• Archive: No

the coal silos. The exceedances reported for both
mercury and especially selenium appears to be
elevated and should be monitored closely in the future
to determine if there are additional contributing
factors to the elevated levels.
10. Interim
CWQCC regulation
Yes
It was determined that groundwater points of
Narrative Standard
41.5.C.6
compliance are unwarranted at the Hayden Gulch
for Ground Water
Loadout. It was determined that any leachate
originating at the loadout would likely be of better
quality than native groundwater in the Lewis Shale
which has high concentrations of dissolved solids.
11. Sampling
Tab 13, p. 8 of CDRMS
Yes
The report indicates that all frequencies were met.
frequency at
mining permit C -92-
surface water
081
12. Parameters to
Table 13 -1 of CDRMS
Yes
be sampled at
mining permit C -92-
surface water sites
081
13. Filing frequency
CDRMS regulation
Yes
of pond reports
4.05.9(17)
14. Timely filing of
CDRMS regulation
Yes
pond reports
4.05.9(17)
15. Content of pond
CDRMS regulation
Yes
reports
4.05.9(15)
16. Sampling
Tab 13, p. 10 of
Yes
Dry Creek alluvial water is monitored in two wells:
frequency of ground
CDRMS mining permit
HGDAL3 (down - gradient) and HGDAL4 (up- gradient).
water monitoring
C -92 -081
Monitored semi - annually.
wells
17. Parameters to
Table 13 -2 of CDRMS
Yes
All required parameters were analyzed.
be analyzed in
mining permit C -92-
ground water
081
samples
18. Basic Standards
CWQCC regulations
Yes
The Loadout did not generate significant amount of
for Ground Water
41.4 and 41.5
leachates in 2011. Both groundwater wells exceeded
the manganese standard (0.2 mg /1) in May and
September of 2011. Groundwater well HGDAL3
exceeded the boron standard (750 ug /1) in September
2011. Groundwater well HGDAL3 exceeded the
cadmium standard (10 ug /1) in May and September
2011. CDRMS has previously determined groundwater
points of compliance are not necessary, based on the
Loadouts lack of potential impacts to ground water
quality (memo dated 6/5/08). TDS of alluvial ground
water consistently exceeds 10,000 mg /1, indicating
"Limited Use and Quality ". Leachate originating from
the Loadout would lack sufficient head to migrate into