2014-05-30_REPORT - C1992081

• Permit No: C1992081
• IBM Index Class Name: Report
• Doc Date: 5/30/2014
• Doc Name: Annual Hydrology Review
• From: DRMS
• To: Hayden Gulch Terminal, LLC
• Annual Report Year: 2013
• Permit Index Doc Type: Hydrology Report
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

24
Page of
during the 2013 water year. Based on the information
provided, the potentially dissolved form is applicable to
NPDES sites and the dissolved form is applicable to
stream sites with the total recoverable form conducted
as a quality control check. The chronic selenium
standard (4.6 ug/l) was exceeded in April (7.1 ug/l),
August (8.2 ug/l), and October (5.6 ug/l) at Site HGSD1
The acute standard (18.4 ug/l) was not exceeded during
the water year. Neither NPDES site was discharging at
the time of the exceedance.

10. Interim Narrative CWQCC regulation 41.6 It was determined that groundwater points of
Standard for Ground compliance are unwarranted at the Hayden Gulch
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.
Tab 13, p. 8 of CDRMS mining The report indicates that all frequencies were met.
11. Sampling frequency
at surface water permit C-92-081

12. Parameters to be Table 13-1 of CDRMS mining All required parameters were analyzed.
sampled at surface permit C-92-081
water sites
13. Filing frequency of CDRMS regulation 4.05.9(17) Sediment ponds associated with C-1992-081 include
pond reports Ponds 001A (Truck Loop Pond) and 002A (Rail Loop
Pond). Quarterly pond inspections were conducted
within the appropriate quarter.
14. Timely filing of CDRMS regulation 4.05.9(17) Quarterly pond inspection reports were submitted and
pond reports received by the Division within an appropriate
timeframe.
15. Content of pond CDRMS regulation 4.05.9(15) All required information was addressed on quarterly
reports sediment pond inspection in water year 2013.

16. Sampling frequency Tab 13, p. 10 of CDRMS mining Dry Creek alluvial water is monitored in two wells:
of ground water permit C-92-081 HGDAL3 (down-gradient) and HGDAL4 (up-gradient).
monitoring wells Monitored semi-annually

17. Parameters to be Table 13-2 of CDRMS mining All required parameters were analyzed.
analyzed in ground permit C-92-081
water samples

18. Basic Standards for CWQCC regulations 41.4 and The Loadout did not generate significant amount of
Ground Water 41.5 leachates in 2013. Well HGDAL3 is downgradient of the
Loadout and well HGDAL4 is the upgradient well from
the Loadout. The manganese standard (0.2 mg/l) was
exceeded at both wells in May and September.
Although 0.2 mg/l is the standard used to protect crops
grown in soils with a pH value lower than 6.0, the