REP42616

• Permit No: C1981008
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: NUCLA NPDES PERMINT CO-0000213
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

COLOR.4D0 DEPARTMENT OF HEALTH, Water Quality Control Division
Rationale -Page 4. Permit No. CO-0000213
EFFLUENT LIMITATIONS:
Table 2 Applicable Regulations - Active Mining <dis. pts. 001 and 006)
parameter SES WQS BPT BAT
Flow (MGD)
pH (s.u.)
031 and Crease (mg/1)
Total Suspended Solids (mg/1)
Total Iron (mg/1)
Settleable Solids (ml/1)
Total Dissolved Solids (mg/1)
--Monitoring Only
6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A
10 N/A N/A N/A
30/45 N/A 35/70 N/A
N/A 6.5/:7A a/ 3.5/7.0 3.5/7.0
N/A N/A N/A 0.5
-Monitor per Colo. Salinity Regulations---
a/ Total Recoverable Iron (mg/1)
'Fable 3 Final Limitations: Discharge Points 001 and 006
Parameter Limitation Basis
Flow (MGD) Report c/ Monitoring Oaly
pH (s.u.) 6.5-9.0 a/ WQS
031 sad Grease (mg/1) 10 b/ SES
Total Suspended Solids (mg/1) 35/70 c/d/ BPT
Total Iron (mg/1) 3.5/7.0 c~/ BAT
Settleable Solids (ml/1) 0.5 b~/ BAT
Total Dissolved Solids (mg/1) Report b~./ Monitoring Only
a/ Daily minimum - Daily maximum
b/ Daily maximum
c/ 30 day average/Daily maximum
d/ Applicab:Clity of limit may be based upon precipitation exemption, subject
to burden of proof requirements. '
e/ Monitoring for electrical conductivity (EC) may be used instead of TDS,
based on certain conditions. See footnote p/ in the permit - Part I.C.
Table 4 Applicable Regulations - Post-Mining for :reclaimed area runoff
(discharge points 002, 003, 004 and 005)
Parameter SES WQS BPT BAT NSPS
Flow (MGD) --------------Monitor:ng Only-----------
pH (s.u.) 6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A 6.0 - 9.0
011 and Grease (mg/1) 10 N/A N/A N/A N/A
Settleable Solids (ml/1) N/A N/A N/A 0.5 0.5
Total Dissolved Solids (mg/1) -----Monitor per Colo. Salinity Regulations--

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