PERMFILE53319

• Permit No: M1995012
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT G OTHER PERMITS
• Media Type: D
• Archive: No

APPENDDC A - STORMWATER MANAGEMENT PLAN (SWMP) 7/93/cg
In this doctunent, the text in hold italics is quoted directly from the Sand and Gravel general permit. The text in straight
type is provided as guidance in the preparation of your SWMP.
The requirement to develop a Stormwater Management Plan (SW7vIP) prior to application for the general permit applies
to all facilities. The applicant shall develop a SWMP for their facility, and certify in Item 8 of the application that it has
been completed. The SWMP shall be prepared in accordance with good engineering practices. (The plan need not be
completed by a registered engittcer.)
The plan shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the
quality of stormwater discharges associated with the mining activity. In addition, the plan shall describe and ensure the
implementation of Best Management Practices (BMPs) which will be used to reduce the pollutants in stormwater
discharges associated with mining activity. BMPs are defined as physical, structural, and/or managerial practices that,
when used singly or in combination, prevent or reduce pollution of water.
1\tining operations must certify the completion of their SWMP, as described in this document. Implementation of
the plan will be required at the time that coverage under the general permit begins. The Division reserves the right to
request and review the plans, and to require additional measures to prevent and control pollution, as needed.
When preparing your plan, make sure to address each item. If it is not applicable to your site, briefly explain why. A
simple "Not Applicable" is not enough. Also note that the SWMP should include any existing stormwater controls at
your site, not just new or proposed ones. Take full credit for what you are already doing.
The SWMP shall include the following items, at a minimum:
1. Sane Slap
The plan shall provide a site map or maps which indicate at a minimum:
- Mining sue boundaries
- Access and haul roads ' '
- Stormwaur ou((aUs and an outline of the drainage area ojeach stormwater outfall
- An estimate ojthe direction ojjlow
- Materials handling areas
- Each existing structural control measure to reduce pollutants in stormwater runoff
- Areas used for storage or disposal of overburden, materials, soils or wastes
- Areas used for mines! milling and processing
- Sprirsgs, streams, wetlands and other surface waters
- Location of mine drainage or any other process water
- Boundary ojtributary area that is subject m effluent limitations
- Date the map was prepared
The drainage areas shown should include the portions of the site where industrial activities occur, as well as those
portions contributing stormwater that mixes with runoff from the industrial area. Therefore, the entire drainage area
where industrial activities occur must ttsually be included.
Aside from mining, industrial activities can include equipment washing, materials storage, vehicle maintenance or
fueling, incineration, waste treatment, storage or disposal, shipping loading/unloading, etc. You do not need m include
industrial activities which only take place indoors, unless there is some part or aspect of dte activity with which
stormwater could come in contact. For example, if all vehicle maintenance is done indoors, but vehicle storage or
fueling is outside, the vehicle storage or fueling area must be addressed.
It is a good idea tQ 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; they show a lazge amount of information for very little effort.