PERMFILE122659

• Permit No: M2003091
• IBM Index Class Name: Permit File
• Doc Date: 8/25/2003
• Doc Name: General Permit Certification
• From: CDPS
• To: LaFarge West Inc
• Media Type: D
• Archive: No

Page 7
Pemtit No. COG-500000
C. EFFLliENT LIMITATIONS AND CONDITIONS - STORMWATER DISCHARGE (continued}
2. Stotmuater Management Plan (SWMPI
A Stormwater Management Plan (S WMP) shall be developed for each facility covered by this section (Part I.C). The S WMP shall
be prepared in accordance with good engineering practices. (A registered engineer need not complete the plan.)
The plan shall identify potential sources ofpollution (including sedimett), which may reasonably be expected to affect the qualityo}
stotmwater dischazges associated with the muting activity. In addition, the plan shall descnbe and ensure the implementation ofbest
management practices (BMPs), which will be used to reduce the pollutants in stormwater dischazges, associated with mining acti~zty.
SWMPs that were prepazed in accordance with requirements in the previous version of the perarit need not be amended to conform
to the SWMP format in this permit.
The pemtinee must implement the provisions of SWMP required under this part as a condition of this permit
The SWIVB shall include the following items, at a minimum:
a. Site Map
The plan shall provide a site map or maps, which indicate at a minimum:
- Mining site boundaries
- Access and haul roads
- Stormwater outfalLs and an outline of the drainage azea of each stormwater outfall
- An estimate of the direction of flow
- Materials handling azeas
- Each existing structural control measure to reduce pollutants in stotmwater runoff
- Areas used for storage or disposal of overburden, materials, soils or wastes
- Areas used for mineral milling and processing
- Springs, streams, wetlands and other surface waters
- Location of thine drainage or any other process water
- Boundary of tributary azea that is subject to effiuent limitations
- Date the trap was prepazed
b. Description of Potential Pollutant Sources/Matetial Inventory
The plan shall provide a description of all potential sources (activities and materials) which may reasonably be expected
add pollutants to stotmwater discharges. Such sources tray include haul roads, equipment storage and maintenance aze:
fuel storage azeas, etc.
In each case where stormwater pollution potential exists, appropriate preventive meazures tmtst be taken and
c. Stotmwater Quality Controls
Each mining site covered by this permit shall develop a description of stormwater quality controls appropriate for that s
and implement such controls. The appropriateness and priorities of controls in the plan sha21 reflect identified poten
sources of pollutants at the site. The descripflon of stotmwarer quality controls shall address the following minim
components, including a schedule for implementing such controls:
I) S WMP Administrator - The S WMP shaIl identify a specific individual or individuals within the mining organize
who is responsible for developing the S WMP and assisting the mine operator in its implementation, raaiatenance,
revision.
2) Materials Handlin¢ and Shill Prevention -Where materials can impact stotmwater runoff, BMPs that reduce
potrntia] for contamination shall be described, For example, materials should be stored and handled in covered a
whenever possible to prevent contact with stormwater; fuels and other chemicals should be stored within bertz
secondary containment devices to prevent leaks and spills from entering stormwater runoff.
3) Erosion and Sediment Controls - Descnbe BMPs that will be used to reduce erosion and prevent sediment
State waters. These should include structural {such as silt fences, sediment ponds, drop structures, check
non-structural (such az mulching and revegetation) methods.