2009-03-06_PERMIT FILE - C1981012A (6)

Home Browse Search

PARTI Page No. 12 Permit No.: CO-0000906 • Sediment Control Plan Plan for 008A) the P By August 1, 2009, the permittee mustdevelop 43482 the fac lity must identify whi?h outfalls (pe.r 0oval 04A, 007Aeand/orrmi Part Section. In accordance with 40 CFR receive runoff from areas that are se n the average annual sediment yield from pre-mined, Coconditionsntrol must be designed to prevent an increase g from the following areas: reclamation areas; brushing and grubbing areas; topsoil s oionsling areas and; regraded areas. Documentation must include the sediment yield from pre-mining, undisturbed cond. . The Sediment Control Plan must identify best management practices (BMPs) and also must describe design expected specifications, construction specifications, maintenance schedules, criteria for inspections opwell as erator must demonstrate performance and longevity of the best management practices. Using watershed models, that will not ter sesthe same wate shedamodel that implementation the Sediment Control undisturbedlconditions. The operator yield than the sediment yield levels p that was, or will be, used to acquire the SMCRA permit. The operator must design, implement, and maintain BMPs in the manner specified in the Sediment Control Plan. Ultimately, the Sediment Control Plan must be approved by the Permits Section and will be incorporated into the permit as an effluent limitation e, the pe sha No later than 14 calendar days fossof specific hdate ract ors being required bye identified datelsaacwritten no ce of compliance either a report of progress or, in the case or noncompliance, any remedial actions taken, and the probability of meeting the next scheduled requirement. • 4. Chronic WET Testine Outfall(s)• 001A 001B and 001C a. Testing and Reporting Requirements Tests shall be done at the frequency listed in Part I.B.1. 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 Chronic 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 chronic WET test in general accordance with methods described in Short Ep?600/4- Methods for Estimating the Chronic Toxicity of Effluents and Receivin Waters to Freshwater Or anisms, 89/001 or the most current edition, except as modified by the most current Division guidance document entitled Guidelines for Conductine, Whole Effluent Toxicity Tests. The permittee shall conduct such tests using Ceriodaphnia dubia and fathead minnows. b. Failure of Test and Division Notification Beginning on the effective date of the limitation, 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 Outfall 001A has been determined to be 57% for Outfa11001B it is 271/6 and for Outfa11001C it _6 9.5%. 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.4.b., c., d., e. and g. means no later than the last day of the laboratory test. c. Automatic Compliance Schedule Upon Failure of Test If a routine chronic WET test is failed, the following automatic compliance schedule shall apply. As part of this, the permittee shall either: