My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
HYDRO31270
DRMS
>
Back File Migration
>
Hydrology
>
HYDRO31270
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 8:55:02 PM
Creation date
11/21/2007 1:27:15 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Hydrology
Doc Date
6/3/1994
Doc Name
RATIONALE FOR PUBLIC NOTICE
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
16
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
<br />• Part <br />Page le of 19 <br />Permit No. CO-0042562 <br />B. MONITORING REQUIREMENTS <br />4. Chronic WET Testing - Outfalls 001 and 002 (continued) <br />(a) Testinf and Reporting Repuirements cont'd <br />The permittee shall conduct each chronic WET test in general accordance <br />with methods described Short Term Methods for Estimating the Chronic <br />Toxicity of Effluents and Receiving Waters to Freshwater Organisms, <br />EPA/600/4-89/001 or the most current edition, except as modified by the <br />most current Division guidance document entitled Guidelines for Conductine <br />Whole Effluent Toxicity Tests. The permittee shall conduct such tests <br />using Ceriodaphnia dubia and fathead minnows. <br />(b) Failure of Test and Division Notification [Prior to Effective Date of <br />Limitation) <br />Prior to the effective date of Che limitation, a chronic WET test is failed <br />whenever 1) there is a statistically significant difference in lethality <br />between the control and any effluent concentration less than or equal to <br />the instream waste concentration ("IWC") and, 2) the IC25, which represents <br />an estimate of the effluent concentration at which 25X of the test <br />organisms demonstrate inhibition as reflected by lethality, is at any <br />effluent concentration less than or equal to the IWC. The IWC for this <br />permit has been determined to be 37X for outfall 001, and 46.9X for outfall <br />002. The permittee must provide written notification of the failure of a <br />WET test to the Division, along with a statement as to whether a <br />Preliminary Toxicity Investigation ("PTI")/Toxicity Identification <br />Evaluation ("TIE") or accelerated testing is being performed (see Part <br />I.B.4.(d)). Notification must be received by the Division within 21 <br />calendar days of the demonstration of chronic WET in the routine required <br />test. "Demonstration" for the purposes of Parts I.B.4(b),(c),(d) and (f) <br />means no later than the last day of the laboratory test. <br />(c) Failure of Test and Division Notification (Beginnine on Effective Date of <br />Limitation) <br />Beginning on the effective date of the limitation, a chronic WET test is <br />failed whenever there is a statistically significant difference in <br />lethality between the control and any effluent concentration less than or <br />equal to the instream waste concentration ("IWC"). The IWC for this permit <br />has been determined to be 37X for outfall 001, and 46:9X for outfall 002. <br />The permittee must provide written notification of the failure of a WET <br />test to the Division, along with a statement as to whether a Preliminary <br />Toxicity Investigation ("PTI")/Toxicity Identification Evaluation ("TIE") <br />or accelerated testing is being performed. Notification must be received <br />by the Division within 21 calendar days of the demonstration of chronic WET <br />in the routine required test. "Demonstration" for the purposes of Parts <br />I.B.4(b),(c),(d), (e) and (g) means no later than the last day of the <br />laboratory test. <br />amended effective <br />
The URL can be used to link to this page
Your browser does not support the video tag.