2001-12-11_PERMIT FILE - C1980007A ‎(4)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Old Permits
• Section_Exhibit Name: Exhibit 07 NPDES Permits
• Media Type: D
• Archive: Yes

PART I
Page l9
Permit No. CO.003877G
•
E. SPECIAL REQUJREAtENTS
2. Stnrmwater Requirements fcontinuedl
i) An inventory and narrative description of significant materials that have been treated, stored or disposed of
in a manner to allow exposure to stormwater from January 1, 1990 to the present; method of on-sits
storage or disposal; and materials management practices employed to minimize contact of these materials
with stotmwater runoff between January 1, 1990 and the present.
ii) A list of significa'ntspills and significant leaks of toxic or hazardous pollutants that occurred at the facility
from January 1, 1990 to the present.
iii) For each mining site area that generates stormwater discharges with a reasonable potential for containing
pollutants, ideatifcatioo of the potential pollutants which are likely to be present in the stormwater '
discharges, r`
iv) A summary of any existing discharge sampling data describing pollutants in the stormwater discharges.
5) Stormwater Oualitv Controls. The SWMP shall include a description of stormwater quality controls to be
implemented at the West Elk Mine. The control measures shall reflect identified potential sources of pollutants
at the site. The description of stormwater quality controls shall address the following minimum components,
including a schedule for implementing such controls:
• i) SWMP Administrator -The SWMP shall identify a specific individual or individuals within the minin_
organisation who is responsible for developing the SWMP and assisting the mine operator in its
implementation, maintenance, and revision.
ii) Risk identification and Assessment -The SWMP shall assess the potential of pollutant sources at the mina
to contribute pollutants to stormwater discharges associated with mining activity. Each of the following
shall be evaluated for the reasonable potential of contributing pollutants to runoff:
- loading and unloading operations;
- outdoor storage of chemicals or equipment;
- outdoor milling or processing activities;
- historic mine drainage;
- tailings ponds;
- crushing facilities or significant Just and particulate __eneraling activities;
- nn-site waste disposal practices::md
- stockpiles of overburden, raw material, intermediate products, byproducts, finished products or waltz
products.
Factors to consider include: the toxicity of the material: quantity of chemicals used; amount of material
processed; the likelihood of contact with stormwater; and history of significant drainage, leaks or spills of
tonic or hazardous pollutants. In each case where stormwater pollution potential exists, appropriate
preventive measures must be identified and implemented.
iii) Preventive i\lainlenance - A preventive maintenance pro_ram shall be included. The program shall
involve maintenance of stormwater management devices (e.g., maintenance of dikes separating mine
drainage from stormwater, cleaning od /water separators and catch basins, ate.), as well as maintenance of
. equipment :md ..+ystams to prevent conditions that could awse breakdowns or failures resultin__ m dischargc+
of pollutants to surface waters.