colorado department of public health and environment
WATER QUALITY CONTROL COMMISSION
5 CCR 1002-38
regulation no. 38
classifications and numeric standards
for
south platte river basin, laramie river basin
republican river basin, smoky hill river basin
. . . . 

REGION: 3 and 4
               
BASIN: Upper South Platte River	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
5c.	Mainstem of Gooseberry Gulch and all tributaries from source to Sunset Trail.	
	Aq Life Cold 2
Recreation U
Water Supply
Agriculture	T=TVS(CS-II) oC
D.O.=6.0 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
S04=WS 	As(ac)=340
As(ch)=0.02-10(Trec)
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
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)	Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		
10a.	Mainstems of East Plum Creek, West Plum Creek, and Plum Creek from the boundary of National Forest lands to Chatfield Reservoir, mainstems of Stark Creek and Gove Creek from the boundary of National Forest lands to their confluence.	
	Aq Life Warm 1
Recreation E
Water Supply
Agriculture	T=TVS(WS-I) 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=0.5
NO3=10
Cl=250
S04=WS	As(ac)=340
As(ch)=0.02(Trec)
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
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)
Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modifications:
Cu (ac/ch) = TVSx2.4 on East Plum Creek and Plum Creek below the Plum Creek Wastewater Authority Discharge. (Type iii). Expiration date of 12/31/2015.
	
11b.	All tributaries to the West Plum Creek system, including all wetlands, which are not on national forest lands, except for specific listings in Segments 9 and 12.	
UP	Aq Life Warm 2
Recreation E
Agriculture	T=TVS(WS-I) 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=0.5
NO3=100
	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		

16a.	Mainstem of Sand Creek from the confluence of Murphy and Coal Creek in Arapahoe County to the confluence with the South Platte River.	
	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac)=TVS
Se(ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modifications: 
Se(ch)= current condition
(Type iii)
Expiration date of 12/31/2015.

Cu (ac/ch) = TVSx2.6 below the Sand Creek Water Reuse Facility outfall. 
(Type iii). Expiration date of 12/31/2015.	

REGION: 3 and 4
               
BASIN: CHERRY CREEK	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
4.	All tributaries to Cherry Creek, including all wetlands, from the source of East and West Cherry Creeks to the confluence with the South Platte River.	
UP	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		

REGION: 3 and 4
               
BASIN: BIG DRY CREEK	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
5.	North Walnut Creek from the western edge of the Central Operable Unit and South Walnut Creek from its source, including all tributaries, lakes, reservoirs and wetlands, to the eastern boundary of the Central Operable Unit and Pond C-2 on Woman Creek.  	
UP	Aq Life Warm 2
Recreation N
Water Supply
Agriculture	T=TVS(WS-II/WL)ºC
D.O.=5.0 mg/l
pH=6.5-9.0
E.Coli=630/100ml	Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	S=0.002
B=0.75
NO2=0.5
NO3=10	As(ac)=340
As(ch)=0.02-10(Trec)
Be(ch)=4
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)	Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	See attached Tables 2 for additional standards.	

REGION: 3 and 4
               
BASIN: Boulder CREEK	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
7b.	Mainstem of Coal Creek from Highway 36 to the confluence with Boulder Creek.	
	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		
9.	Mainstem of Boulder Creek from a point immediately above the confluence with South Boulder Creek to the confluence with Coal Creek.		Aq Life Warm 1
Recreation E
Water Supply
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=0.5
NO3=10
Cl=250
SO4=WS	As(ac)=340
As(ch)=0.02(Trec)
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
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)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification:
Cu (ac/ch)=Current Condition.  (Type iii).
Expiration date of 12/31/2015.
	
10.	Mainstem of Boulder Creek from the confluence with Coal Creek to the confluence with St. Vrain Creek.	
	Aq Life Warm 1
Recreation E
Water Supply
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=0.5
NO3=10
Cl=250
SO4=WS	As(ac)=340
As(ch)=0.02(Trec)
Cd(ac/ch)=TVS
CrIII(ac)=50(Trec)
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)	Ni(ac/ch)=TVS 
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		

REGION: 3 and 4
               
BASIN: ST. VRAIN CREEK	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
3.	Mainstem of St. Vrain Creek from Hygiene Road to the confluence with the South Platte River.	

	Aq Life Warm 1
Recreation E
Agriculture	T=TVS(WS-I) 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=0.5
NO3=100	As(ac)=340
As(ch)=7.6(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)	Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		
6.	All tributaries to St. Vrain Creek, including wetlands from Hygiene Road to the confluence with the South Platte River, except for specific listings in the Boulder Creek subbasin and in Segments 4a, 4b, 4c and 5.	
UP	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Mn(ch)=WS(dis)
Hg(ch)=0.01(Tot)	Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification:
Se(ch)=6.6g/l (dis). 
(Type iii).  Expiration date of 12/31/2015.  

REGION: 3 and 4
               
BASIN: MIDDLE SOUTH PLATTE RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
3a.	All tributaries to the South Platte River, including all wetlands, from a point immediately below the confluence with Big Dry Creek to the Weld/Morgan County line, except for specific listings in the subbasins of the South Platte River, and in Segments 3b, 5a, 5b, 5c, and 6. 	
UP 	Aq Life Warm 2 
Recreation E 
Agriculture 	T=TVS(WS-I) 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=0.5
NO3=100	As(ac)=340
As(ch)=7.6(Trec)
Cd(ac/ch)=TVS 
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS 
Cu(ac/ch)=TVS 	Fe(ch)=1000(Trec) 
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS 
Hg(ch)=0.01(Tot) 
Ni(ac/ch)=TVS 	Se(ac/ch)=TVS 
Ag(ac/ch)=TVS 
Zn(ac/ch)=TVS 	Fish Ingestion Standards

REGION: 3 and 4
               
BASIN: BIG THOMPSON RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
5.	Mainstem of The Big Thompson River from I-25 to the confluence with the South Platte River.	
	Aq Life Warm 2
Agriculture

5/1 – 10/15
Recreation P

10/16 – 4/30
Recreation N	T=TVS(WS-I) oC
D.O. = 5.0 mg/l
pH = 6.5-9.0

5/1 – 10/15
E.Coli=205/100ml

10/16 – 4/30
E.Coli=630/100ml	NH3(ac/ch)=TVS
Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	S=0.002
B=0.75
NO2=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification:
Se(ch)=5.7 g/l (dis). 
(Type iii).  
Expiration date of 12/31/2015.
	
9.	Mainstem of the Little Thompson River from the Culver Ditch diversion to the confluence with the Big Thompson River.	
	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification:
Se(ch)=13.1 g/l (dis). (Type iii).  Expiration date of 12/31/2015.

REGION: 3 and 4
               
BASIN: CACHE LA POUDRE RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
12.	Mainstem of the Cache La Poudre River from a point immediately above the confluence with Boxelder Creek to the confluence with the South Platte River.	
	Aq Life Warm 2
Recreation E
Agriculture	T=TVS(WS-I) 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=2.7
NO3=100	As(ac)=340
As(ch)=7.6(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Nitrite as a 30 day average.  
Fish Ingestion Standards

Temporary modification:
Se(ch)=7.1 g/l (dis). (Type iii). Expiration date of 12/31/2015.
	
13a.	All tributaries to the Cache La Poudre River, including all wetlands, from the Monroe Gravity Canal/North Poudre Supply canal diversion to the confluence with the South Platte River, except for specific listings in Segments 6, 7, 8, 13b and 13c.	
UP	Aq Life Warm 2
Recreation E
Agriculture
Water Supply	T=TVS(WS-I) 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=0.5
NO3=10
Cl=250
SO4=WS	As(ac)=340
As(ch)=0.02-10(Trec)
Cd(ac/ch)=TVS
CrIII(ch)=TVS
CrIII(ac)=50(Trec)
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)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		
22.      Fossil Creek Reservoir.	UP	Aq Life Warm 2
Recreation E
Agriculture	T=TVS(WL) 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=0.5
NO3=100
	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		

REGION: 3 and 4
               
BASIN: LOWER SOUTH PLATTE RIVER	
Desig	
Classifications	
NUMERIC STANDARDS	
TEMPORARY
MODIFICATIONS
AND
QUALIFIERS

	
	
PHYSICAL
and
BIOLOGICAL	
INORGANIC

mg/l	
METALS

g/l

Stream Segment Description							
1.	Mainstem of the South Platte River from the Weld/Morgan County line to the Colorado/Nebraska border.	
	Aq Life Warm 2
Recreation E
Water Supply
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=0.5
NO3=10
Cl=250
SO4=WS	As(ac)=340
As(ch)=0.02-10(Trec)
Cd(ac/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)	Ni(ac/ch)=TVS
Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification:
Se(ch)=12.3 g/l (dis). (Type iii).  Expiration date of 12/31/2015.
	
2b.	All tributaries to the South Platte River, including all wetlands, north of the South Platte River and below 4,500 feet in elevation in Morgan County, north of the South Platte River in Washington County, north of the South Platte River and below 4,200 feet in elevation in Logan County, north of the South Platte River and below 3,700 feet in elevation in Sedgwick County, and the mainstems of Beaver Creek, Bijou Creek and Kiowa Creek from their sources to the confluence with the South Platte River, except for the portion of Beaver Creek from its source to the Fort Morgan Canal.	
UP	Aq Life Warm 2
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=0.5
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Fe(ch)=1000(Trec)
Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(Tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS		

. . . .

[All of Table 3 is deleted.]

. . . .

38.79	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE JUNE 13, 2011 RULEMAKING REGARDING TEMPORARY MODIFICATIONS; EFFECTIVE DATE JANUARY 1, 2012
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
The Commission’s decision to delay consideration of nutrient criteria until March 2012, resulted in cancelation of the December 2011 review of temporary modifications.  Accordingly, the Commission considered the expiration dates of temporary modifications expiring on or before December 31, 2012 in a written comment rulemaking.  The following temporary modifications were deleted because they will have expired as of the effective date of this revision:
Upper So Platte segments 5c, 10a, 11b, and 16a (NH3)
Cherry Creek segment 4 (NH3)
Boulder Creek segments 7b, 9, and 10 (NH3)
St Vrain Creek segments 3 and 6 (NH3)
Middle So Platte segment 3a (NH3)
Big Thompson River segments 5 and 9 (NH3)
Cache la Poudre River segment 12, 13a, and 22 (NH3)
Lower So Platte River segments 1 and 2b (NH3)
Big Dry Creek segment 5:  The Commission deleted Table 3 because the temporary modifications expired on January 1, 2010.  The temporary modification for nitrate and nitrite had been applied to the Walnut Creek portion of segment 5.  The temporary modifications for benzene, carbon tetrachloride, 1,2-dichloroethane, 1,1-dichloroethene, tetrachloroethylene, and trichloroethylene were applied to all of segment 5.  All other organic and radiologic parameters are covered by the Basic Standards. 
The Commission also modified the standards table to remove reference to Table 3 and to remove the words “Goal qualifier for all use classifications, expires 12/31/09”.