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 l l
Permit No. CO-0038776
B. MOMTORING REQUIItEMENTS
3. Acute WET Testing - Outfalls 002. 004. 011 and 013 (continued)
Any permittee that is required to conduct a PTi/TIE investigation shall do so in conformance with procedures
identified in the following documents, or as subsequently updated: I) Methods for Aquatic Tonicity Identification
Evaluations. Phase [ ToxicitKCharac[eriza[ion Procedures, EPA/600/6-91/003 Feb. 9l and 2) Methods for Aquatic
Tozici Identification Evaluations. Phase II Tonicity Identification Procedures, EPA/600/3-88/035 Feb. 1989.
A third document in this series is Methods for Aquatic Toxicity Identification Evaluations. Phase 1[I Tonicity
Confirmation Procedures, EPA/600/3-88/036 Feb. 1989. As indicated by the title, this procedure is intended to
confirm that Ute suspected toxicant is truly [he toxicant. This investigation is optional.
Within 90 days of the determination of the toxicant or no later than 210 days aker demonstration of toxicity,
whichever is sooner, a control program is to be developed and received by the Division. The program shall set down
a method and procedure for elimination of the toxicity to acceptable levels.
(e) Request For Relief
The permittee may request relief from further investigation and testing where the toxicant has not been determined and
the Division has determined suitable treatment does not appeaz possible. In requesting such relief, the permittee shall
submit material sufficient [o establish the following:
(i) It has complied with terms and conditions of the permit compliance schedule for the PTI/TIE investigation
• and other appropriate conditions as may have been required by the Division;
(ii) During the period of the tonicity incident it has been N compliance with all other permit conditions,
including, in the case of a POTW, pretreatment requirements;
(iii) During [he period of [he toxicity incident it has properly maintained and operated all facilities and systems of
treatment and control; and
(iv) Despite the circumstances described in paragraphs (i) and (iii) above, the source and/or cause of toxicity
could not be located or resolved.
If deemed appropriate by the Division, the permit or the compliance schedule may be modified to revise the ongoing
monitoring and tonicity investigation requirements to avoid an unproductive expenditure of the permittee's resources,
provided that the underlying obligation to eliminate any continuing exceedance of the toxicity limit shall remain.
(f) Soontaneous DisaQyearance
If toxicity spontaneously disappears a[ any time aker a test failure, the permittee shall notify the Division in writing
within 14 days of a demonstration of disappearance of the toxicity. The Division may require the permittee [o develop
and submit additional information which may include, but is not limited to, the results of additional testing. If no
pattern of toxicity is identified or recurring toxicity is not identified, the toxicity incident response is considered closed
and normal WET testing shall resume.
(g) Toxicity ReQ~ener
This permit may be reopened and modified (following proper administrative procedures) to include new compliance
dates, additional or modified numerical permit limitations, a new or different compliance schedule, a change in the
whole effluent toxicity testing protocol, or any other conditions related to the control of toxicants if one or more of the
following events occur:
See Part I.C. for Definitions. Amendment No. 2 Issued FEB 7 9. 1 997 Effective APR O 7 . 7 997