COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT 
WATER QUALITY CONTROL COMMISSION 
5 CCR 1002-34
REGULATION NO. 34
CLASSIFICATIONS AND NUMERIC STANDARDS
FOR
SAN JUAN AND DOLORES RIVER BASINS
. . . .
34.6 	TABLES
. . . .
STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 9

BASIN:  ANIMAS AND FLORIDA RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS	

	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

ug/l		

Stream Segment Description							

13b.	 All tributaries to the Animas River from a point immediately below the confluence with Hermosa Creek to the Southern Ute Indian Reservation boundary except for the specific listings in Segments 12d, 13a, 14a and 14b; all tributaries to the Florida River, from a point immediately below the confluence with Mud Creek to the Southern Ute Indian Reservation boundary, except for specific listings in Segment 12d.	

Aq Life Cold 2
Recreation E
Water Supply
Agriculture	
T=TVS(CS-I) oC
D.O.= 6.0 mg/l
D.O.(sp)=7.0 mg/l
pH = 6.5-9.0
E.Coli=126/100ml	
NH3(ac/ch)=TVS
Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	
S=0.002
B=0.75
NO2=0.05
NO3=10
Cl=250
SO4=WS	
As(ac)=340
As(ch)=0.02(Trec)
Cd(ac)=TVS(tr)
Cd(ch)=TVS
CrIII(ac)=50(Trec)
CrIII(ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=WS(dis)
Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Mn(ch)=WS(dis)
Hg(ch)=0.01(tot) Mo(ch)=160(Trec)
	
Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac)=TVS
Ag(ch)=TVS(tr)
Zn(ac/ch)=TVS	
Water + Fish Standards
Temporary Modification for Coal Gulch, including all tributaries:
NH3=current condition. 
Type A
Expiration date 6/30/2015.

Temporary modification:
As(ch)=hybrid
Expiration date of 12/31/21.	
. . . .	

REGION: 9

BASIN:  LA PLATA RIVER, MANCOS RIVER, McELMO CREEK, AND SAN JUAN RIVER IN MONTEZUMA COUNTY AND DOLORES COUNTY	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS	

	
PHYSICAL
and
BIOLOGICAL	
INORGANIC
mg/l	
METALS
ug/l		

Stream Segment Description							

7a.	Mainstem of McElmo Creek from the source to the Colorado/Utah border, except for the specific listings in Segment 7b. Mainstem of Yellow Jacket Creek, including all tributaries and wetlands, from the source to the confluence with McElmo Creek. 	
	
Aq Life Warm 1
Recreation E
Agriculture	
T=TVS(WS-II) oC
D.O. = 5.0 mg/l
pH = 6.5-9.0
E.Coli=126/100ml	
NH3(ac/ch)=TVS
Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	
S=0.002
B=0.75
NO2=0.05 NO3=100
	
As(ac)=340
As(ch)=7.6(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrIII(ch)=100(Trec)
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	
Fe(ch)=2200(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS 
Hg(ch)=0.01(tot)
Mo(ch)=160(Trec)
	
Ni(ac/ch)=TVS Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	
Temporary Modifications:
NH3(ac)=old TVS, NH3(ch)=0.06(type A)
Expiration date 6/30/2015.

8c.	Unnamed tributary to Ritter Draw (confluence at 37.40216,-108.54582).	

UP	
Aq Life Warm 2
Recreation E
Agriculture	
T=TVS(WS-III) oC
D.O. = 5.0 mg/l
pH=6.5-9.0
E.Coli=126/100ml	
NH3(ac/ch)=TVS
Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	
S=0.002
B=0.75
NO2=0.05 NO3=100
	
As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrIII(ch)=100(Trec)
CrVI(ac/ch)=TVS	
Cu(ac/ch)=TVS
Fe(ch)=1000(Trec)
Mn(ac/ch)=TVS 
Pb(ac/ch)=TVS
Hg(ch)=0.01(tot) Mo(ch)=160(Trec)
	
Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	
Temporary Modifcation:
NH3=current conditions

Type A
Expiration date 6/30/2015.
	
. . . .

34.42	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE DECEMBER 9, 2013 RULEMAKING REGARDING TEMPORARY MODIFICATIONS; FINAL ACTION MARCH 11, 2014 EFFECTIVE DATE JUNE 30, 2014
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 scheduled to expire before December 31, 2015, to determine whether the temporary modification should be modified, eliminated or extended.  Temporary modifications of standards on three segments were reviewed. 
Temporary Modifications for ammonia on the following segments were reviewed: 
Animas and Florida River segment: 13b 
La Plata River, Mancos River, McElmo Creek, and San Juan River segments: 7a, 8c 
Temporary Modifications were extended for existing discharges to these segments in 2012, based upon evidence that the dischargers could not meet water quality based effluent limits for ammonia.  The uncertainty in the standard for each segment may be resolved through a site-specific standard or a discharger specific variance. The expiration dates were extended to 6/30/2015. The Division intends to have proposals ready to resolve the uncertainty with the ammonia standards for the annual Temporary Modification hearing in December 2014.
PARTIES TO THE RULEMAKING HEARING
1.	Rio Grande Silver, Inc.
2.	Black Hawk/Central City Sanitation District and City of Black Hawk
3.	Centennial Water & Sanitation District, City of Littleton, City of Englewood
4.	Colorado Parks and Wildlife
5.	Homestake Mining Company of California
6.	Metro Wastewater Reclamation District
7.	South Platte Coalition for Urban River Evaluation (SP CURE)
8.	City of Boulder
9.	Seneca Coal
10.	Tri-State Generation and Transmission Association
11.	City of Fort Collins
12.	MillerCoors, LLC
13.	Environmental Protection Agency
14.	Barr Lake and Milton Reservoir Watershed Association
15.	Plum Creek Water Reclamation Authority