PERMFILE105530

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 44 NPDES Permit No. CO-0042161
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF PUBL/C HEALTH AND ENVIRONMENT, Water Quality Control Division
Rationale -Page 9, Permit No. CO-0042161
• a) Anew permit is issued where the discharge was not in existence at the time of the classiftcation and
standards rulemaking, or
b) In the case of a continuing discharge, additions! information or factors have emerged that were nor
anticipated or considered at the time of the classification and standards rulemaking. "
Furthermore, this is not a new discharger and na new information has been presented regarding the
classifications and standards. Therefore, the water quality standard-based e,~luenr /imitations of this permit are
determined to be reasonably related ro the economic, environmental, public health and energy impacts to the
public and affected persons and are in furtherance ojthe policies set forth in Sections 25-8-102 and l04. /jthe
perminee disagrees with this finding, pursuant to 61.11(b) the permittee should submit all pertinent information
to the Division during the public notice period.
B. Monitoring
I. Ellluent Monitoring: E,~luent monitoring will be required as shown in Tables Vim, V-5, and V-6. Refer ro the
permit for locations of monitoring poims.
Table V-4 - MonitorinX Requirements for OutfaU 007
r Parameter Monitoring Frequency . Sample "type
Flow, MGD Weekly /nsranraneous
or Continuous
Total Suspended Solids, mg/f Monthty Crab
• Oil and Grease, mg/! Weekly Wsua[ a/
pH, s.u. (Minimum-Maximum) Weekly /n-Situ
Total Dissolved Solids, mg/f Quarterly Grab
Total Ammonia as N, mg/! Monthty Grab
Total Recoverable Iron, mg/! Monthty Grab
Whole Effluem Toxicity, Chronic Lethality Quarterly 3 Composites/I'est*
• Per a previously approved agreemem, the permittee may collect 2 composite samples per test, with samples
collected on consecutive days, when the discharge is inrermittem.
a/ If a visible sheen is noted at any time, a grab sample shall be collected and anatyzed for oil and grease. The
results are to be reported on the DMR under parameter 03582.
Table V-5 -
002
Effluent Parameter Monrtoring Frequency. ~ Sample -Type: ~; 3 =- , ;
Flow, MGD Weekly Instantaneous or Cominuous
pH, s. u. (Minimum-Maximum) Weekly /n-Situ
5-Day Biochemical Oxygen Monthly Grab -
Demand (BODE, mg/!
Tonal Suspended Solids, mg/! Monthly Grab
Fecal Coliform, No./IOOm! Monthly Grab
Table V-6 -Influent Monitoring Requirements jot Dutjall 002
• 7 ent arumeter MonUOnng requenry p Type .
Flow, MGD Weekly Instantaneous or
S-Day Biochemical Oxygen Monthly Grab '
Demand (BODE, mg/!