HYDRO29975

• Permit No: C1981022
• IBM Index Class Name: Hydrology
• Doc Date: 11/12/1991
• Doc Name: RATIONALE FOR PUBLIC NOTICE
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

PART I
Page le of 19
Permit No. CO-0000132
B. MONITORING REQUIREMENTS
2. Reporting of Data
Reporting of the data gathered in compliance with Part I.B.1 shall be
on a quarterly basis.
Monitoring results obtained during the previous 3 months shall be
summarized and reported on Division approved discharge monitoring
report (DMR) forms, postmarked no later than the 28th day of the month
following the completed calendar quarter. For example, for the 1st
quarter (January, February, and March) the quarterly report must be
received at this office postmarked no later than April 28. If no
discharge occurs during the reporting period, "No Discharge" shall be
reported.
Duplicate signed copies of the above report forms shall be submitted
to the following addresses:
Colorado Department of Health
Water Quality Control Di•ri sion
4210 East 11th Avenue
Denver, Colorado 80220
Attention: Permits and Enforcement
U.S. Environmental Protection Agency
Denver Place
999 18th Street, Suite 500
Denver, CO 80202-2405
Attention: Water Management Division
Compliance Branch 8WM-C
3. Storm Exemption - Discharge points 003, 004, 005, 006, 007, 009 and 010
If the permittee intends to use the 10-year, 24-hour storm exemption,
a report must be submitted within 90 days after the effective date of
this permit, documenting that the facility is designed, constructed
and will be maintained to contain or treat:
(a) The maximum volume of wastewater which would be generated by the
facility during a 24-hour period without an increase in volume
from precipitation; and
(b) The maximum volume of wastewater resulting from a 10-year,
24-hour precipitation event, including the volume which would
result from all areas contributing runoff to the individual
treatment facility (i.e., all runoff not diverted from the active
mining area or the mill area).