REP01568

• Permit No: C1981018
• IBM Index Class Name: Report
• Doc Name: AHR REQUIREMENTS & INFORMATION PERMIT # C-81-018
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

PART 1
Page viii
Permit No. CO-0000396
B. h1ONITORING REQUIREMENTS
2. Rye online oC Data (continued)
The fast duplicate signed copy of each discturge monitoring report (DMR) shall be submitted [o the following agency:
U.S. Eavironmwtal Protection Agwcy
Water Meaagemwl Division
NPDES Brwch SWM~
999 18th Street, Suite 500
Drover. CO 80202-2466
The third and fourth copies aro for the permittee records. The Discharge Moaitotittg Report forms shall be filled out
accurately and completely in acoordaace with nxluiremeats of this permit and the instructiooa on the forms. They shall
be signed by as authorized person ae identified in Part I.D.
3. Acute VVEI' Testine-0utfalls 004. 023. 024 and 026
(a) Testine and Reoortine Requiremwts
Tests shall be done at the froquwcy listed in Part LB.1. Test readts chap be reported along with the Discharge
Monitoring Report (DMR) submitted for the reporting period during which the sample was tekom. (i.e., WET testing
results for the first calwdar quarter wdiag March 31 shall be reported with the DMR due April 28.) The results
shall be submitted oa the Acute Toxicity Test report form, available from the Division. Copies of these reports are
to be submitted to both the Division end EPA along wish the DMR.
The permittee shall conduct each acute WET test in gweral accordance with methods described in
90/027 or the most currwt edition, eztxpt as modified by the most current Division guidance documwt wtitled
Guidelines for l'onductine Whole Eflluwt Tonicity Tests. The petmittee shall coad[rct an acute 48-hour WET test
using Daphnia Maene sp., and as awls 96-hour WET test using fathead minnows. Acute tests will be replacement
static tests of a single effiuwt grab sample.
(b) Failure of Test and Division Notification
Aa acute WET test is failed whomever the LCD, which represwts an estimate of the effiuwt coacomtratioa which is
lethal to 50:6 of the test orgmisms is the time period prescnbed by the test, is found to be less than or equal to
10056 effluent. The pemtittee must provide writtw notification of the failure of a WET test to the Division, along
with a atatemomt as b whether the Preliminary Toxicity Incidomt ('PTI')/I'oxicity Idomtification Evaluation ('TIE')
investigation or acceleratod testing is being performed (see nett section). Nolitimtion must be received by the
Division within 14 calendar days of the demonstration oC acute WET in the routine required lest.
'Demonstration' for the purposes of Parts I.B.4(b),(c),(d) and (f) means no later thaw We lest day of the laboratory
test.
(c) Automatic Compliance Schedule Ump Failure of Test
if a routine acute WET test is failed, the following automatic compliance schedule shall apply. As part of this the
permittee shall either:
(i) proceed to conduct the PTI/fIE investigation as described in Part I.B.4.(d), or
(ii) conduct accelerated testing using the single species found to be more sensitive.
If accelerated testing is being performed, the permitlee 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) trop consecutive tests fail or three of five tests fail,=in which
case a pauem of tonicity has beom demonstrated or, 2) two consecutive tests pass or three of five tests pass, in
which case no pattern of toxicity has been found.
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