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• <br />B <br />PART I <br />Page le of 19 <br />Permit No. CO-0000221 <br />MONITORING REQUIREMENTS <br />1. Fre_quencv and Sample Tyoe <br />In order to obtain an indication of the probable compliance or non- compliance <br />with the effluent limitations specified in Part 1.A, the permittee shall monitor <br />all effluent parameters at the following frequencies: <br />a) Discharge Points 002, 003, 005, 006, 010, 011 <br />Effluent Parameter Measurement Frecuencv d/ Sample Tvoe e/ <br />Flow, MGD Weekly Instantaneous <br /> or Continuous <br />Total Suspended Solids, mg/1 Monthly Grab <br />Total Iron, mg/1 Monthly Grab <br />Oil and Grease, mg/1 f/ weekly Visual <br />pH, a.u. Weekly In-Situ <br />Total Dissolved Solids, mg/1 g/ Quarterly Grab <br />Whole Effluent Toxicity, Acute (002,003) Annually - See Part I.B.S Grab <br />Whole Effluent Toxicity, Acute <br />(005, 010, 011) Quarterly - See Part I.B.S crab <br />Whole Effluent Toxicity, Acute (006) Semiannually - See Part I.B.S Grab <br />Sampling by the permittee for compliance with the monitoring requirements specified <br />above shall be performed at the following locations: discharge points 002, 003, <br />• 005, 006, 010 and 011. <br />b) Discharge Points Ooa, ooe <br />Effluent Parameter Measurement Freauencv d/ Sample Tvoe e/ <br />Flow, MGD Weekly+ Instantaneous <br />or Continuous <br />Total Suspended Solids, mg/1 Monthly Grab <br />Total Recoverable Iron, mg/1 Monthly Grab <br />Oil and Grease, mg/1 f/ Weekly* Visual <br />pH, s.u. Weekly+ in-Situ <br />Total Dissolved Solids, mg/1 g/ Quarterly Grab <br />Whole Effluent Toxicity, <br />Chronic (004,008) Quarterly++ - See Part I.B.4 3 Grabs/Test <br />Sampling by the permittee for compliance with the monitoring requirements specified <br />above shall be performed at the following locations: discharge points 004 and 008. <br />+ Monitoring for these parameters are required on a monthly basis only from November <br />through February of each year for discharge points 004 and 008. <br />++ The quarterly monitoring for Chronic WET testing for outfalls 004 and 008 is <br />exempted for the first calendar quarter (January, February, March) of each year due <br />to problems with site inaccessibility. Quarterly monitoring may be exempted during <br />the fourth quarter of each year, if the permittee can adequately demonstrate that <br />local conditions are inaccessible for collecting a chronic WET testing sample during <br />this period. <br />• Amended 07 OB 94 Effective 09/O1/9a <br />Amended 1 1~~_ Effective ,~~~~4~ <br />