REP42616

• Permit No: C1981008
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: NUCLA NPDES PERMINT CO-0000213
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division
Rationale - Page 3. Permit No. CO-0000213
•
FACILITY DESCRIPTION:
Figure 3 is a site sketch which shows clearly the location of all ponds,
discharge points, active mining and reclaimed areas, the receiving streams,
and the location of the spoils spring and other pertinent facilities. This
sketch also shows the location of a landfill to the north of the site. This
landfill is covered by a certificate of designation from the Hazardous
Materials and Waste Management Division of the Colorado Department of Health.
San Miguel and Montrose county are working with Peabody Coal Company and the
Waste Management Division of the health department to address landfill issues.
MONITORING SUMMARY AND OPERATING HISTORY:
This facility has had a discharge permit since April, 1976. The discharge
monitoring report (DMR) data indicate no significant compliance problems. The
DMR's are available for review in the permit files for this facility.
Additional analyses were submitted with the permit application. The data
indicates that the effluent will meet stream standards and effluent
limitations. No state sampling data has been collected at this facility. An
inspection was performed on May 10, 1989 pursuant to this permit renewal and
no specific problems were noted, although the permittee was informed at that
time that they would be required to perform biomonitoring on the effluent.
This requirement is discussed is further detail in this rationale.
• EFFLUENT LIMITATIONS:
Effluent limitations are based on State Effluent Standards (SES), State Water
Quality Standards (WQS), Federal Best Practicable Control Technology (BPT),
Federal Best Available Technology Economically Achievable (BAT), or Federal
New Source Performance Standards (NSPS). The federal limitations are,
respectively, per 40 CFR Parts 434.42, 434.43, and 434.45 for active mining
areas, Part 434.63 for precipitation events, and Parts 434.52, 434.53, and
434.55 for post-mining areas. Briefly, a new source is a facility which was
constructed, or a ma,)or alteration was made to a facility, after May 4, 1984.
Since the facility was constructed prior to this date and no major alterations
have occurred, the NSPS are not applicable. However, the permlttee must
notify the Division of any event which could or does result in "new, altered
or increased discharge of pollutants" from the site.
State Effluent Standards (SES) (10.1.0) apply to all discharges in the state
for parameters not superseded by Federal Effluent Guidelines or Stream
Standards. The SES apply to the more conventional pollutants. The SES-based
limitation for this permit is for oil and grease. Refer to the Discussion
Section, Paragraph D for a discussion of water quality standard-based
parameters.
Table 2 shows a comparison of the applicable limitations for discharge points
001 and 006, which are those which could contain effluent from active mining
and/or unreclaimed areas at this facility. Table 3 shows the limitations
• which will be applied to these discharge points. Tables 4 shows a compariso^
of the applicable limitations for discharge points 002, 003, 004 and 005,
which are those from "poat~ining" areas (i.e. those areas reclaimed but for
which the SMCRA bond issued by the !II.RD has not yet been released). Table 5
shows the limitations which will be applied to these discharge points.