HYDRO30295

• Permit No: C1982055
• IBM Index Class Name: Hydrology
• Doc Date: 3/4/1993
• Doc Name: CERTIFICATION COAL MINING GENERAL PERMIT
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

C

COIARADO DEPARTMENT OF HEALTH, Water Quality Control Division
Rationale - Page 3. Permit No. CO-0039560
APPLICABLE RULES AND REGULATIONS:
Table 1 below, shows State Effluent Standards (SES), Federal Best Practicable
Control Technology (HPT), Federal Best Available Technology Economically
Achievable (BAT) and State Water Quality Standards (WQS) applicable to this
facility.
Table 1
Parameter
pH, s.u. a/
Oil and Grease, mg/1 a/
Total Suspended Solids, mg/1
Total Iron, mg/1
Settleable Solids, ml/1 c/
SES WQS BPT BAT
6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A
10 N/A N/A N/A
30/45 d/ N/A 35/70 b/ N/A
N/A N/A 3.5(7.0 6( 3.517.0
N/A N/A N/A 0.5
a/ This parameter applicable at all times.
b/ This limitation applicable to discharges during periods of no precipitation
c/ This parameter applicable to discharges during periods of precipitation
less than or equal to the 10-year, 24-hour event for this facility
d/ This limitation does not apply pursuant to Section 10.1.3(3) of the State
Regulations for Effluent Limitations.
EFFLUENT LIMITATIONS, RATIONALE AND MONITORING FREQUENCIES
Table 2
Parameter
pH, s.u.
Oil and Grease, mg/1
Total Suspended
Solids, mg/].
Total Iron, mg/1
Settleable Solids
Flow, MGD
Limitation Rationale
6.5 - 9.0 e/ WQS
10 e/ SES
35/70 f/ BPT
3.5/7.0 f/ BAT
ml/1 0.5 g/ BAT
Monitor Only N/A
Monitoring
Frequency
Weekly
Weekly
Monthly
Monthly
Monthly
Weekly
el This limitation shall apply at all times.
f/ This limitation shall apply to discharges during periods of no
precipitation and may apply to discharges during periods of precipitation.
g/ This limitation may apply to discharges during periods of precipitation
less than or equal to the 10-year, 24-hour event for this facility.