2009-03-06_PERMIT FILE - C1981012A ‎(6)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 3/6/2009
• Section_Exhibit Name: Exhibit 22 NPDES Permit
• Media Type: D
• Archive: Yes

ENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division
COLORADO DEPARTM
Rationale - Page 20, Permit No. CO-0000906

in
it
•
will be required as shown in Tables VI-I I and VI-17. Refer to the permit for
g
or
1. Effluent Monitoring - Effluent mon
locations of monitoring points.
Table VI-11-Monitorin Requirements or Out alts O01A, 001B, DOIC, 009A, 0098 and 009C
Sample Type°.
Measurement Frequency
Parameter
Continuous*
Recorder*
Flow, MGD
2 Days/Month
Grab
TSS, mg11 2 Days/Month /n-situ
s.u.
pH,
2 Days/Month **
Visual
Oil and Grease, mg/1
2 Days/Month Grab
Iron, Total, ,ug/1
2 Days/Month Grab
Total Ammonia (as N), mg11
2 Days/Month ]n-situ
Electrical Conductivity, dS/m 2 Days/Month Calculated***
SA R 2 Days•/Month Grab
Calcium, mg/1
2 Days•/Month
Grab
Magenesium, mg/I
2 Days/Month Grab
Sodium, mg/l 2 Days/Month Grab
Bicarbonate, mg/I
Quarterly Grab
WET, Acute (009A, B. C)
Quarterly 3 Grabs/Test
WET, Chronic (001A, B, C)
* Flow may be measured on an instantaneous weekly basis until such time that mine dewatering begins.
d and analyzed for oil and grease. The results are to be reported
t
ll
* * If a visible sheen is noted, a grab sample sha
• ec
e
ll be co
on the DMR under parameter 03582.
* * * SAR is calculated based on the equations set forth in the permit
Table VI-12 - Monitoring Re uirements or Out alts 00", 007A & 008A
Parameter ' -Measurement Frequency Sample Type
Flow, MGD Weekly Instantaneous
Two Days/Month Grab
TSS, mg/1
pH, s.u. Two Days/Month In-Situ
Two Days/Month Visual
Oil and Grease, mg11
Total,ug/1 Two Days/Month Grab
Iron,
Settleable Solids, ml/1 Two Days/Month Grab
* If a visible sheen is noted, a grab sample shall be collected and analyzed for oil and grease. The results are to be reported
on the DMR under parameter 03582.
Table VI-13 - Monitoring Requirements for Outfall MONI