COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT
WATER QUALITY CONTROL COMMISSION
5 CCR 1002-36
REGULATION NO. 36
CLASSIFICATIONS AND NUMERIC STANDARDS
FOR
RIO GRANDE BASIN 
. . . .
36.28	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE DECEMBER 2009 RULEMAKING REGARDING TEMPORARY MODIFICATIONS; FINAL ACTION FEBRUARY 8, 2010; EFFECTIVE DATE JUNE 30, 2010
The provisions of C.R S. 25-8-202(1)(a), (b) and (2); 25-8-203; 25-8-204; and 25-8-402; provide the specific statutory authority for adoption of these regulatory amendments.  The Commission also adopted in compliance with 24-4-103(4) C.R.S. the following statement of basis and purpose.
BASIS AND PURPOSE
Pursuant to the requirements in the Basic Standards (at 31.7(3)), the Commission reviewed the status of temporary modifications to determine whether the temporary modification should be modified, eliminated or extended.
Ammonia:  Temporary modifications of ammonia standards on five segments were reviewed.  
Deleted:  Ammonia temporary modifications were deleted on the following segments because in most cases permits had recently been reissued for dischargers on the segments.  Compliance schedules in the permits are adequate to address any necessary treatment plant upgrade issues.  In other cases, no permits now discharge to this segment.
Rio Grande segment 12
Alamosa River segment 18
Closed Basin segments 13b and 14
Detail added: The chronic ammonia temporary modification for Closed Basin segment 3 was modified to clarify that the chronic standard’s value is 0.06 mg/l, rather than just “TVS old.” 
This temporary modification will expire 12/31/2011 and will be reviewed again in the December 2010 Temporary Modification hearing.
PARTIES TO THE RULEMAKING
1.	City of Grand Junction
2.	City of Colorado Springs and Colorado Springs Utilities
3.	Tri-Lakes, Upper Monument, Security and Fountain Wastewater Treatment Facilities
4.	Paint Brush Hills Metropolitan District
5.	Pueblo West Metropolitan District
6.	City of La Junta
7.	Seneca Coal Company
8.	Tri-State Generation and Transmission Association
9.	Plum Creek Wastewater Authority
10.	Centennial Water and Sanitation District
11.	City and County of Broomfield
12.	City of Fort Collins
13.	Metro Wastewater Reclamation District
14.	City of Black Hawk and the Black Hawk/Central City Sanitation District
15.	Colorado Division of Wildlife
16.	U.S. Environmental Protection Agency