HYDRO31380

• Permit No: M1974004
• IBM Index Class Name: Hydrology
• Doc Date: 10/31/1992
• Doc Name: CERTIFICATION CDPS GENERAL PERMIT STORMWATER DISCHARGES ASSOCIATED WITH SAND AND GRAVEL
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF HEALTH • •
Wmcr Quality Comrol Division
4210 East ll:h ;:srnue
Denver, Colorado 80220
RATIONALE
SAND AND GRAVEL PRODUCTTON OPERA77ONS
(AND OTHER NONMETALL/C MINERALS EXCEPT FUEL)
GENERAL PERMIT IN COLORADO
COLORADO D/SCHARCE PERM/T NUMBER COC-50010100
SECOND RENEWAL
CONTENTS
1. UPDATE
!/. INTRODUC77ON - STORMWATER PROGRAM
1/1. COVERAGE UNDER 7HIS PERMIT
IV APPL/CA77ON AND CERTIF/CATTON
V. TERMS AND COND/77ONS OF PERMIT
UPDATE
PAGE
This is jor the renewal of the general sand and gravy! permit first issued on October 28, 1982, atd reusued on June 10,
1987.
The General Permit system for regulating sand and grasrl production operations has worked we!! jor the State of
Colorado. However, there are numerous changes which have been made in the permit that will be highlighted in this
rationale. Most of the conditions of the previous rationales are alto still applirobk unless otherwise tuned.
A. ReaWhoriration
Part LA.6 of the permit specifies that authorization to discharge under this general permit will expire on September
30, 1997. Any permiaee desiring cominurd roverage must re-apply by March 31, 1997.
I/. /NIRODUCTTON - STORMWATER PROGRAM
As required under the Clean Water Act amendments of 1987, the Environmental Protection Agency (EPA) has established a
framework jor regulating municipal and industrial stormwmer discharges. This framework rs under the National Pollutant
Discharge Elimination System (NPDES) program. The regulations (40 CFR 122.26) require specific tylxs of industrial
facilities which discharge stormwmer associated with industrial activity (industrial atorntwaterJ, to obtain coinage far this
discharge under an NPDES permit. Facilities which discharge industrial stormwater either directly ro .rurfatt waters or
indirectly, through municipal separate storm sewers, must be cot,ered by a permit.
The federal effluent guidelines that govern discharges from sand and grave! mining jacilities (40 CFR 436J control most
surface runoff from mining jacilities. However, there are some sources of stormwater from these sites which are nut
addressed, such err roads and railroad lines, pond omslopes, inactive loadotas, sites used for storage and maimenance of
material handling equipmem, etc.
For sand and gravel operations, other mining and quarrying of nonmetallic minerals excrpt fuels, and,ror asphalt and
ronnete batch plums located err such facilities, this genera! permit will rover both the process water discharges and