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B. MONITORING REQUIREMENTS <br />1. Freguency and Sample Tvpe <br />PART I <br />Page No. 8a (replaces page 8) <br />Permit No.: CO-0044776 <br />In order to obtain an indication of the probable compliance or noncompliance with the effluent limitations specified in <br />Part I.A.1, [he permittee shall monitor all effluent parameters at the following frequencies. Such monitoring will begin <br />immediately and last for the life of the permit unless otherwise noted. The results of such monitoring shall be reported <br />on the Discharge Monitoring Report form (See Part I.E.) <br />a. Outfalls 001, 002, 003, 005, 007, 008, and 009 <br />Effluent Parameter <br />Flow, MGD__ _ _ _ <br />Total Suspended Solids (TSS), mg/] <br />pH, s u. (minimum-maximum) m.. _. <br />__ ~. <br />Oil and Grease, mg/I <br />Total Dissolved Solids, me/1 <br />Total Iron, ug/I <br />Settleable Solids, m]/1 <br />Freouencv ~ .t ~~ ~ Sample~pe --_- ,. <br />Weekly _ ! Instantaneous or Continuous <br />Monthly j Grab <br />Weekly p In-situ <br />I Weekly <br />_. _Quarterly_. ........ <br />Monthly <br />Monthly ~ " - <br />Visual <br />.............-.. <br />Grab <br />Grab <br />Grab <br />b. Outfalls 006 and 010 <br />...... _ . _, _ _ 1 ........_. <br />EtlluentParame[er Frequency ~ ~ Sample~~x <br />-- <br />• Flow MGD ~ Weekly j Instantaneous or Continuous <br />Total Suspended Solids (TSS) mg/1 Monthly _ Grab <br />pH,~s u (minimum maximum) ~ Weekly In situ <br />Oil and Grease, mg/I Weekly Visual I <br />' Total Dissolved Solids, mg/] ' Quarterly Grab <br />Totallron ug/1 Monthly Grab <br />__ _.._._ . _. _.. _ l <br />Whole Effluent Toxicity, Chronic ~ Quarterly 3 Composites/Test <br />__,_.._~~_ _,._._._ ~ _...._ ..._._.__~___.~~~...~_~_._i <br />c. Outfalls MN06 and MN10 <br />Effluent Parameter Frequency Sample Tvne <br />Total Recoverable Arsenic, ug/1 Monthly Grab <br />Potentially Dissolved Cadmium, ug/1 Monthly Grab <br />Total Recoverable Trivalent Chromium, ug/I - Monthly Grab <br />Potentially Dissolved Copper, ug/1 Monthly Grab <br />Total Recoverable Iron, ug/1 Monthly Grab <br />Dissolved Iron, ug/1 Monthly Grab <br />Dissolved Manganese, ug/I Monthly Grab <br />Total Mercury, ug/1 * Monthly Grab <br />Potentially Dissolved Nickel, ug/I Monthly Grab <br />Potentially Dissolved Selenium, ug/I Monthly Grab <br />• Potentially Dissolved Silver, ug/1 Monthly Grab <br />Potentially Dissolved Zinc, ug/1 Monthly Grab <br />*Low level Mercury Monitoring Required <br />AMENDED JUNE 28, 2007 EFFECTIVE AUGUST 1, 2007 EXPIRATION AUGUST 31, 2009 <br />