_GENERAL DOCUMENTS - C1981017 ‎(301)‎

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Name: Bid Documents ‎(IMP)‎
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

Metal Mining SWMP Guidance Document
Page 3
It is a good idea to start with a portion of the USGS (U.S. Geological Survey) quadrangle map showing the site.
These are available and easily obtainable for the entire state (call USGS, [phone]); they show a large
amount of information for very little effort. You can then use the USGS map as a guide for preparing your site
map, which will be more detailed.
Counties may also have maps suitable as bases to begin mapping procedures. If no other suitable base maps are
available, one must be developed. Regardless of the source of the base map, the site map needs to be of
suitable scale to show the industrial portion of the facility and the features within it.
The map should show, at a minimum:
Locations of stormwater outfalls:
If the site has a stormwater drainage system, the location of outfalls is a simple task. Indicate on the map
where pipeline outfalls are, as well as the general layout of the drainage system such as inlets, grates,
pipelines, etc. If stormwater is conveyed over land without a developed storm drainage system, the points
where runoff collects and runs off must be located.
Drainage basins for each outfall:
Field inspection can usually accomplish this task with acceptable accuracy. Look for high areas such as
crests of parking lots, roads, etc. which would form the division between drainages. Gullies and swales are
indicators of stormwater flow direction. Obviously, if runoff is observed during a storm, most uncertainties
can be eliminated.
Surface water bodies (including dry water courses):
Mark on the site map any surface water bodies, including lakes, streams, springs, wetlands, detention ponds,
roadside or irrigation ditches, etc. These do not necessarily need to be within the facility, but may be
adjacent to it or impacted by stormwater runoff.
Existing structural control measures to reduce stormwater pollution:
Show on the map the location of any structural stormwater pollution control measures, such as detention
ponds, diversion ditches, covered material storage areas, fuel farm secondary containment structures, etc.
4. Stormwater Management Controls
Each mining operation certified under by this permit shall develop a description of stormwater
quality controls appropriate for that site, and implement such controls. The appropriateness and
priorities of controls in the plan shall reflect identified potential sources of pollutants at the mining
site. The description of stormwater quality controls shall address the following minimum
components, including a schedule for implementing such controls:
a. SWMP Administrator- The SWMP shall identify a specific individual or individuals within the
mining organization who is responsible for developing the SWMP and assisting the mine
operator in its implementation, maintenance, and revision. The activities and responsibilities of
the administrator should address all aspects of the facility's SWMP.
The SWMP Administrator becomes the contact for all SWMP-related issues and is the person responsible for its
accuracy, completeness, and implementation. Therefore, the SWMP Administrator should be a person in an
authoritative position. Larger facilities may want to develop a "SWMP team" in order to share the
responsibilities and generate greater awareness and participation.
b. Identification of Potential Pollutant Sources and Best Management Practices - The SWMP
shall identify potential sources of pollutants at the site, and assess the potential of these
sources to contribute pollutants to stormwater discharges associated with mining activities.
The SWMP must also describe appropriate Best Management Practices (BMPs) to reduce
the potential of these sources to contribute pollutants to stormwater discharges. At a