REV92047

• Permit No: M1985043
• IBM Index Class Name: Revision
• Doc Date: 3/19/2001
• To: DMG
• Type & Sequence: AM2
• Media Type: D
• Archive: No

03/20/2001 10:16
7195760f~9
MOUNTAINDALE ~GRD.
Summary of Findings and Corrective Actions
Red Canyon Quarry
COG500809
PAGE 91
9ECEIVED
WIAR 2 02001
a~vision of Nlinerel6 ii QOdOgy
Findings ~ Corrective Action
CDPS permit ('~~G500809 was issued for
storm water dist;harges only. The discharge
that occurred in late April and eazly May 1949
was composed of stormwater which had been
in comact wRh the quarry azea, and was
therefore proce<_s water. This discharge
occtrted in violation ofthe CDPS permit.
The facility did not notify the Colorado
Department of Public Health and F,nvirotuncnt
or EPA of the d scharge of storm water and
process water ttat occurred in late April and
early May 1999. This failure to notify is a
violation of Cbl'S permit COG500809.
The Storm Wafer Management Plan (S WMP)
required by Part i.C.2 of permit COG50(1809
indicates that any dischazges which occur
from the sedimc a basin will be sampled or
evaluated for nun-storm water components.
No sampling or:valuation records were
available for the discharge that occurred in
late April and early May 1999.
The SWMP has not been updated since it was
developed in 19')4. Changes have occurtcd at
this site includin; increased area vfimpact
from mining operetions and changes to BMPs
within the quazr~.
Section I.C.9 of CAPS permit COG500809
requires an employee education program
relating to storrc water management- The
SWMP does rmf address any educational
requirettlents.
:~
Rocky Mountain Materials and Asphah must
ensure that any discharge that occurs from its
facility is composed of storm water only.
Rvcky Mountain Materials and Asphalt roust
give CDPHE a 24-hour verbal notification of
any violation of its perrttit, as well as a five (5)
day written notification as described in Part
II.A.3 of permit COG500809.
Once the permittee develops its SWMP, it
tx:cvmes part ofthe enforceable requirements
of the storm water permit. Failure to meet the
requirements of the SWMP becomes a
violation of the permit.
As stated in Part i.C.4(b) of permit
COG500809, the SWMP should be
periodically updated to reflect changes in the
operatioru at the quarry. Rocky Mountain
Materials and Asphah must update the SWMP
and submit the updated SWMP to both
CDPHE and EPA at the addresses listed in the
inspection letter.
Rocky Mountain Materials and Asphah should
develop an education program and outline the
program in the updated S WMP.
Post-It" brantl fax transmittal memo 7671 ~~ora•9ro

-S S