2018-11-05_PERMIT FILE - C1981044 ‎(12)‎

• Permit No: C1981044
• IBM Index Class Name: Permit File
• Doc Date: 11/5/2018
• Section_Exhibit Name: EXHIBIT 02 OTHER REQUIRED PERMITS
• Media Type: D
• Archive: No

• COLORADO DEPARTMENT OF HEALTH
Water Quality Control Division
Rationale - Page 7
Permit No. CO -0034142
APPLICABLE RULES AND REGULATIONS:
Outfall 023 (Continued)
FC: The fecal coliform limitation is determined by the same mass balance
formula. Because there are no domestic dischargers to the Williams Fork
River upstream of this facility, an instream value of zero is assumed in
the absence of actual data. Thus, the following results:
E1 a 2000 (25.9 + 0.019) - (25.9 R 0)
0.019
- 2,728,316
Division policy dictates maximum FC limitations of 6000/12000, which
apply in this case.
PH: In various letters from Empire Energy Corporation during April 1983
• through October 1983, the permittee had noted that the pH values had been
exceeding their permit limit of 6.0-9.0 s.u. Because these exceedeaces
were constantly occurring and are due to algal growth problems, the
division explored whether a higher limit was allowable while assuring
protection of the receiving water.
The following Discharge Point 023 effluent pH values were reported by
Empire Energy during 1983:
Date pH, s.u. Date pH, S.U.
4-22
9.5
6-3
9.5
4-29
9.4
7-22
9.3
5-4
9.1
7-29
9.6
5-6
9.1
8-5
9.6
5-13
9.1
8-15
9.5
5-20
9.2
8-19
9.6
5-23
9.3
8-26
9.6
5-24
9.3
9-2
9.5
5-25
9.4-9.6
9-9
9.6
5-26
9.4
9-23
9.4
5-27
9.7
9-30
9.5
The instream water quality standard for pH for the Williams Fork River is
in the range of 6.5 to 9.0 s.u.
0