2008-09-15_PERMIT FILE - C1992081

• Permit No: C1992081
• IBM Index Class Name: Permit File
• Doc Date: 9/15/2008
• Doc Name: CDPS Permit
• Section_Exhibit Name: Tab 13 Appendix 13-1
• Media Type: D
• Archive: No

PART II
Page No. 12
Permit No. COG-850000
2. PTI/TIE
The results of the PTI/TIE investigation are to be received by the Division within 120 days of the demonstration of
chronic WET in the routine test, as defined above, or if accelerated testing is performed, the date the pattern of
toxicity is demonstrated. A status report is to be provided to the Division at the 30, 60 and 90 day points of the
PTUTIE investigation. The Division may extend the time frame for investigation where reasonable justification
exists. A request for an extension must be made in writing and received prior to the 120 day deadline. Such
request must include a justification and supporting data for such an extension.
The permittee may use the time for investigation to conduct a PTI or move directly into the TIE. A PTI consists of
a brief search for possible sources of WET, which might reveal causes of such toxicity and appropriate corrective
actions more simply and cost effectively than a formal TIE. If the PTI allows resolution of the WET incident, the
TIE need not necessarily be conducted. If, however, WET is not identified or resolved during the PTI, the TIE
must be conducted within the allowed 120 day time frame.
Any permittee that is required to conduct aPTI/TIE investigation shall do so in conformance with procedures
identified in the following documents, or as subsequently updated: 1) Toxicity Identification Evaluation:
Characterization of Chronically Toxic Effluents, Phase I, EPA/600/b-91/OOSF May 92, 2) Methods for Aquatic
Toxicity Identification Evaluations, Phase I Toxicity Characterization Procedures, EPA/600/6-91/003 Feb. 91 and
3) Methods for Aquatic Toxicity Identification Evaluations, Phase II Toxicity Identification Procedures,
EPA/600/3-88/035 Feb. 1989.
A fourth document in this series is Methods for Aquatic Toxicity Identification Evaluations, Phase III Toxicity
Confirmation Procedures, EPA/600/3-88/03b Feb. 1989. As indicated by the title, this procedure is intended to
confirm that the suspected toxicant is truly the toxicant. This investigation is optional.
Within 90 days of the determination of the toxicant or no later than 210 days after 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.
3. Re uest For Relief
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The permittee may request relief from further investigation and testing where the toxicant has not been determined
and suitable treatment does not appear possible. In requesting such relief, the permittee shall submit material
sufficient to establish the following:
i. It has complied with terms and conditions of the permit compliance schedule for the PTUTIE investigation
and other appropriate conditions as may have been required by the WQCD;
ii. During the period of the toxicity incident it has been in compliance with all other permit conditions,
including, in the case of a POTW, pretreatment requirements;
iii. During the period of the 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 maybe modified to revise the
ongoing monitoring and toxicity investigation requirements to avoid an unproductive expenditure of the pernuttee's
resources, provided that the underlying obligation to eliminate any continuing exceedance of the toxicity limit shall
remain.
4. Spontaneous Disappearance
If toxicity spontaneously disappears at any time after 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 to
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.