2011-06-17_PERMIT FILE - C1981018

• Permit No: C1981018
• IBM Index Class Name: Permit File
• Doc Date: 6/17/2011
• Doc Name: Water Discharge Permit
• Section_Exhibit Name: Illustration 46
• Media Type: D
• Archive: No

0
PART
Page No. 9
Permit No.: CO- 0038024
Effluent Limitations for Outfalls MNOI, MN04, MN08, MN09, MN26, and MN29
Total Recoverable Arsenic, ug/1
Report
N/A
Report
Total Recoverable Beryllium, ug/1
Report
N/A
Report
Total Recoverable Cadmium, ug/l
Report
N/A
Report
Total RecoverableTrivalent Chromium, ug/1
Report
N/A
Report
Total Recoverable Copper, ug/1
Report
N/A
Report
Total Recoverable Lead, ug/1
Report
N/A
Report
Total Recoverable Manganese, ug/l
Report
N/A
Report
Total Recoverable Nickel, ug/l
Report
N/A
Report
Total Recoverable Selenium, ug/l
Report
N/A
Report
Total RecoverableZinc, ug/l
Report
N/A
Report
There shall be no discharge of floating solids.
2. Acute WET Testing- Outfall(s): 004, 026, and 029
a. Testing and Reporting Requirements
Tests shall be done at the frequency listed in Part I.B.I . Test results shall be reported along with the Discharge
Monitoring Report (DMR) submitted for the reporting period during which the sample was taken. (i.e., WET testing
results for the first calendar quarter ending March 31 shall be reported with the DMR due April 28.) . The results shall be
submitted on the acute Toxicity Test report form, available from the Division. Copies of these reports are to be submitted
to the Division along with the DMR.
The permittee shall conduct each acute WET test in general accordance with methods described in Short Term Methods
for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms, EPA/600 /4- 89/001 or
the most current edition, except as modified by the most current Division guidance document entitled Guidelines for
Conducting Whole Effluent Toxicity Tests. The permittee shall conduct such tests using Daphnia magna and fathead
minnows.
b. Failure of Test and Division Notification
An acute WET test is failed whenever the LC50, which represents an estimate of the effluent concentration which is
lethal to 50% of the test organisms in the time period prescribed by the test, is found to be less than 100% effluent. The
permittee must provide written notification of the failure of a WET test to the Division, along with a statement as to
whether the Preliminary Toxicity Incident ( "PTI ") /Toxicity Identification Evaluation ( "TIE ") investigation or accelerated
testing is being performed (see next section). Notification must be received by the Division within 14 calendar days of
the demonstration of acute WET in the routine required test. "Demonstration" for the purposes of Parts I.B.3(b),(c),(d)
and (f) means no later than the last day of the laboratory test. .
c. Automatic Compliance Schedule Upon Failure of Test
If a routine acute WET test is failed, regardless of whether the limit is in effect, the following automatic compliance
schedule shall apply. As part of this, ... the - permittee shall either: - -
• i. Proceed to conduct the PTI /TIE investigation as described in Part I.A.31A., or
ii. Conduct accelerated testing using the single species found to be more sensitive.
If accelerated testing is being performed, the permittee shall provide written notification of the results within 14
calendar days of completion of the Pattern of Toxicity/No Toxicity demonstration. Testing will be at least once
every two weeks for up to five tests until; 1) two consecutive tests fail or three of five tests fail, in which case a pattern of