Laserfiche WebLink
~~~ ~ ~ <br />~,~ <br />H. MONITORING REQUIREMENTS <br />8. Control Program (Cont.) <br /> <br />Part I <br />Page lg of 19 <br />Permit No. CO-0042161 <br />Such cost benefit analysis shall be used in accordance with Section <br />25-8-503(8) and (9), C.R.S. The control program, as submitted to or <br />revised by the Division, may be incorporated into the permit. <br />A control program may include, but shall not be limited to: additional <br />pretreatment requirements imposed on specific indirect permittees by <br />POTW's, modification of internal source control programs by industries, <br />modifications of treatment plants, and/or best management practices for <br />spills, leaks, etc. <br />9. Toxicity Incident Closure <br />If WET is controlled through implementation of numeric limits For <br />specific toxicants, through a control program eliminating toxicants from <br />the waste stream, or through the implementation of treatment processes, <br />or if WET disappears and Division required accelerated testing <br />demonstrate the continued absence of toxicity, the toxicity incident • <br />shall be considered closed. <br />If the permlttee completes all required phases of the toxicity incident <br />response specified in compliance schedules, and is unable either to <br />identify the causative toxicants and their sources or to identify <br />feasible treatment options, the permittee may petition the Division for <br />relief from further investigation and testing, consistent with the <br />permit regulations. <br />10. Frequency and Sample Type - Chronic WET Testing <br />The monitoring frequency for chronic toxicity tests shall be once every <br />six months on a January - June, July - December sequence, and cannot <br />coincide with acute testing. The first such test must be completed and <br />reported on the December DMR due January 28, 1990. Chronic tests will <br />be static replacement tests using three composite effluent samples, each <br />of which is to be composited for a minimum of eight hours. Chronic <br />testing will be conducted with both Ceriodaphnia sp. and fathead minnows <br />during the first year. During years two and three, if requested in <br />writing by the permittee, the Divsion may grant relief from continued <br />two species testing. Such relief shall be for continued testing with <br />only that species which has demonstrated the greatest sensitivity during <br />the first year of testing. The results shall be submitted on the <br />Chronic Toxicity Test report form, available from the Division. Copies <br />of these reports are to be submitted to both the Division and EPA. <br />C J <br />Revised 5/2/89 <br />Doc 1003M <br />