2017-05-11_PERMIT FILE - C1981012 ‎(18)‎

• Permit No: C1981012
• IBM Index Class Name: Permit File
• Doc Date: 5/11/2017
• Section_Exhibit Name: Exhibit 22 NPDES Permit
• Media Type: D
• Archive: No

PART I
Page 20 of 52
Permit No.: C00000906
F. SPECIAL STUDIES AND ADDITIONAL MONITORING
1. Mixing Zone Analyses for Outfall 001
Conduct remaining threshold tests for exclusion from further analysis under Mixing Zone Regulations. The second
threshold test is the Application of the Mixing Zone Exclusion Tables (p. 20, Colorado Mixing Zone Implementation
Guidance, February 2002). Under this compliance action, the permittee will collect the necessary site-specific
data, perform the required analysis, and provide a report to the Division. The report will indicate the findings of
this threshold test and, if not excluded, provide the workplan for the next threshold test (i.e., determining of the
size of the physical and regulatory mixing zones).
Code Event Description Due Date
50008 Submit Study Collect site-specific data, perform threshold tests based on 03/31/2018
Results Mixing Zone Exclusion Tables, and submit study results.
2. Temperature Monitoring Equipment for Outfall 001
The facility is required to install continuous temperature monitoring equipment by December 31, 2015 (6
months) to comply with the temperature monitoring 'continuous' requirements listed in EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS.
G. CONTROL MEASURES (Outfalls 004, 007,008, 010, 011 and 012)
All control measures used by the permittee to meet the effluent limitations contained in this permit must be selected,
designed, installed, implemented, and maintained in accordance with good engineering hydrologic and pollution
control, and the manufacturer's specifications, when applicable.
1. Installation and implementation specifications
Installation and implementation specifications for each control measure type used by the permittee to meet the
effluent limitations contained in this permit must be retained with the SWMP (see STORMWATER MANAGEMENT
PLAN section).
2. Maintenance of Control Measures and Associated Documentation
a. The permittee must maintain all control measures used to achieve the effluent limits required by this
permit in effective operating condition. For this permit, maintenance includes preventative and routine
maintenance, modification, repair, replacement, or installation of new control measures. Observations
resulting in maintenance activities can be made during a site inspection, or during general observations of
site conditions.
b. Corrective actions associated with maintaining control measures must be conducted with due diligence, as
soon as possible after the need is discovered, to achieve the effluent limits required by this permit. The
permittee must implement interim control measures to achieve the effluent limits required by this permit
while performing maintenance of the primary control measure.
c. The permittee shall document corrective actions associated with maintaining control measures, in
accordance with the CORRECTIVE ACTIONS section of this permit, and shall revise the facility SWMP to
reflect replacement or installation of new control measures in accordance with the STORMWATER
MANAGEMENT PLAN section requirements.
H. INSPECTIONS (Outfalls 004, 007, 008, 010, 011 and 012)
1. Inspection Frequency and Personnel
The permittee shall conduct and document field inspections of all drainage areas contributing runoff to the outfalls
referred to in this Part, as follows: