PERMFILE121385

• Permit No: C1981025A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: NPDES Permits for the Mine and Loadout Facility
• Section_Exhibit Name: 4.0 Appendix 4-G
• Media Type: D
• Archive: Yes

PARTI
Permit No. CO-0029599
Page No. 15
• D. SPECIAL REQUIREMENTS
2. Stormwater Requirements (continued)
h. Termination of Stormwater Permit Covera¢e Requirement
1) Termination Criteria
a) Reclamation Permit Release: When a site has been reclaimed in accordance with the Colorado Division of
Minerals and Geology (CDMG) requirements and the site has been released from State reclamation
requirements, the permittee may request termination of the stotmwater coverage under this permit.
b) Termination in the absence of CDMG Permit: For facilities without CDMG permits, permittees wishing [o
terminate stormwater coverage under this permit through mine-waste remediatioa most amend their SWMP
to include the items listed in Part I.C.S, above, prior to implementation of the remediation work. In
addition, permittees seeking coverage under the Voluntary Cleanup Act must notify the Division of their
intent 30 days before any remediation activities commence. The notification must include certification
language and signature by the permittee. (See Part LE.2 of the permit.)
Stormwater coverage under this permit may be terminated once raw materials, intermediate products,
byproducts, fmished products and waste products (including acid generating material exposed by the mining
activity) have been removed or isolated and the site has been stabilized (with little evidence of soil erosion
or other nmoff problem) and revegetated. The following criteria must be met for the entire mine site,
including any on-site disposal areas:
• i) all raw materials, intermediate products, byproducts, finished products and waste produce (including
acid generating material exposed by the mining ac[iviry) have been removed or permanently isolated
from stormwater; and
ii) all soil disturbing activities at the site have been completed; and
iii) vegetation has been established with an average cover or density, over the previously disturbed area, of
a minimum of 40 percent vegetative cover or 70 percent of the vegetative cover of a similar undisturbed
site, whichever is higher (vegetative cover or density determinations need not be determined
scientifically by extensive measurement and statistical analyses; simple representative transects aze
adequate.); or equivalent permanent physical erosion reduction methods have been employed.
The Division may, after consultation with the permittee and upon good cause being shown, revise the
vegetative cover requirement on a case-by-case basis.
2) Request for Termination
When a site has been reclaimed in accordance with the CDMG requirements and the site has been released from
State reclamation requirements, or the above Termination Criteria have been met, the permittee may request
termination of stormwater coverage under this permit. The Division will consider termination of stormwater
coverage when:
a) the permittee has submitted a completed Inactivation Form as provided by the Division which summarizes
the work accomplished;
. b) In the case of mine-waste remediation projects, the permittee has submitted photographic documentation of
the post remediation conditions at the mine site;
c) All stormwater discharges to state waters associated with mining activities have ceased and the permittee has
demonstrated to the Division the termination criteria have been met or the CDMG performance bond has
been released;