2008-09-19_PERMIT FILE - C1981018A ‎(2)‎

• Permit No: C1981018A
• IBM Index Class Name: Permit File
• Doc Date: 9/19/2008
• Doc Name: Water Discharge Permit
• Section_Exhibit Name: Illustration 46
• Media Type: D
• Archive: Yes

PART II
Page No. 8
Permit No.: CO-0038024
Effluent Limitations for Outfalls MNOl, MN04, MN08, MN09 and MN26
• Effluent Limitations
Parameter
30-Day Avg. 7-Day Avg. Daily Max.
Total Recoverable Arsenic, ug/1 Report N/A Report
Total Recoverable Beryllium, ug/1 Report N/A Report
Total Recoverable Cadmium, ug/1 Report N/A Report
Total RecoverableTrivalent Report N/A Report
Chromium, ug/1
Total Recoverable Copper, ug/1 Report N/A Report
Total Recoverable Lead, ug/1 Report NIA Report
Total Recoverable Manganese, ug/1 Report N/A Report
Total Recoverable Nickel, ug/1 Report N/A Report
Total Recoverable Selenium, ug/1 Report N/A Report
Total RecoverableZinc, ug/1 Report N/A Report
There shall be no discharge of floating solids.
2. Acute WET Testine-Outfall(s): 004 and 026
a. Testing and Reporting Requirements
Tests shall be done at the frequency listed in Part I.B.1. Test results shall be reported a long 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 both the Division and EPA 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 Or ap nisms, 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 Toxici _ Tests. The permittee shall conduct such tests using Ceriodaphnia magna and
fathead minnows.
b. Failure of Test and Division Notification
Once the limitation is effective, a chronic WET test is failed whenever there is a statistically significant difference in
lethality between the control and any effluent concentration less than or equal to the instream waste concentration (IWC).
The IWC for this permit has been determined to be 100%. The permittee must provide written notification of the failure
of a WET test to the Division, along with a statement as to whether a Preliminary Toxicity Investigation (PTI)/Toxicity
Identification Evaluation (TIE) or accelerated testing is being performed. Notification must be received by the
Division within 21 calendar days of the demonstration of chronic WET in the routine required test. Demonstration
for the purposes of Parts I.A.3.b., c., d., e. and g. means no later than the last day of the laboratory test. Prior to the
effective date of the limitation, a PTUTIE is not required.
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 PTUTIE investigation as described in Part I.A.3.d., or
ii. Conduct accelerated testing using the single species found to be more sensitive.