2019-01-08_REPORT - C1994082

• Permit No: C1994082
• IBM Index Class Name: Report
• Doc Date: 1/8/2019
• Doc Name: Annual Hydrology Report Adequacy Review
• From: DRMS
• To: Peabody Energy, LLC
• Annual Report Year: 2017
• Permit Index Doc Type: Hydrology Report
• Email Name: RAR
• Media Type: D
• Archive: No

Peabody Energy, LLC
Page 4
2018

Requirement Requirement citation Comment
10. Interim Narrative
Standard for Ground Water
CWQCC regulation 41 No water quality data was located for Point of
Compliance Well SGAL70.
It was determined that bedrock groundwater points of
compliance are unwarranted at the Yoast Mine. Well
SGAL70 serves as the Yoast Mine’s Grassy Creek
Alluvial ground water point of compliance and well
YSAL3 serves as the alluvial ground water point of
compliance for Sage Creek. Ambient values for site
YSAL3 were below the Reg. 41 standards during the
2017 water year.
11. Sampling frequency at
surface water
Tab 15, Table 15-9 of
CDRMS mining permit
C-
1994-082
The report indicates that all frequencies were met.
12. Parameters to be
sampled at surface water
sites
Tab 15, Table 15-4 and
15-5 of CDRMS
mining permit C-1994-
082
Parameters to be sampled are conductivity
(umhos/cm), pH (units), temperature (C), total
recoverable iron (mg/l), dissolved manganese (mg/l),
total mercury (ug/l), dissolved nitrate (mg/l), dissolved
nitrite (mg/l), total ammonia (mg/l), dissolved selenium
(ug/l), dissolved sulfate (mg/l), total sulfide (mg/l), total
suspended solids (mg/l) and total dissolved solids
(mg/l). All required parameters were analyzed. All
parameters were met.
13. Filing frequency of pond
reports
CDRMS regulation
4.05.9(17)
The sediment ponds associated with C1994082
include 010, 011, 011A, 012, 012A, 013, and 014.
Quarterly pond inspections were conducted within the
appropriate quarter.
14. Timely filing of pond
reports
CDRMS regulation
4.05.9(17)
Quarterly pond inspection reports were submitted and
received by the Division within an appropriate
Time frame.
15. Content of pond reports CDRMS regulation
4.05.9(15)
All required information was addressed on quarterly
sediment pond inspection in water year 2017.
16. Sampling frequency of
ground water monitoring
wells
Tab 15, Table 15-8 of
CDRMS mining permit
C-
1994-082
Ground water samples are collected from YSAL1,
YSAL3, YAAL14, YGAL16, YOV30, YW30 YWU30,
YWC33, YWCU33. Note: No water quality data was
located in the report for the following sites, monitored on
an annual basis: YTM32, and SGAL70 and SFAL72.
17. Parameters to be
analyzed in ground water
samples
Tab 15, Table 15-4 of
CDRMS mining permit
C-
1994-082
Parameters to be sampled are conductivity
(umhos/cm), pH (units), temperature (C), dissolved iron
(mg/l), dissolved manganese (mg/l), dissolved
fluoride (mg/l), dissolved nitrate (mg/l), dissolved
nitrite (mg/l), dissolved selenium (ug/l), dissolved
sulfate (mg/land total dissolved solids (mg/l). At
measured sites all parameters were met. However, it
appears that not all sites were measured.