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COLORADO DEPARTMENT OF PUBL/C HEALTH AND ENVIRONMENT, Water Quality Control Division <br />Rationale -Page 23, Permit No. CO-0027154 <br />Table V-5 -- Monitoring Requirements Jor Outfalls 001, 003, 005, 007 and 020 <br />Parameter Monitoring Frequency Sample Type <br />Flow, MGD Weekly Instantaneous <br /> or Cattinuous <br />Total Suspended Solids, mg/2 Twice Monthly Grab <br />Settleable Solids, m7/f* Monthly Grab <br />Oi[ and Grease, mg/Q Weekly Visual <br />pH, s.u. (Minimum-Maximum) Weekly /n-Situ <br />Electrical Conductivity, urnho/cm Monthly Grab <br />WET, Chronic Lethality <br />Outfalls 001, 005, 007, 020 only Quanerly 3 Grabs?est <br />Cadmium (PD), mg/e Twice Monthly Grab <br />Copper (PD), mg/Q Twice Monthly Grnb <br />Iron (TR), mg/C Twice Monthly Grab <br />Manganese (PD), mg/2 Monthly Crab <br />Silver (PD), mR/2 Twice Monthly Grab <br />* Tlris parameter does not apply to outfnl! 020 <br />Tabte V-6 -- Monitoring Requirements Jor Outfall 009 <br />Parameter Monitoring Frequency Sample Type <br />Flow, MGD Weekly Instantaneous <br /> or Continuous <br />Settleable Solids, nt7/2 Monthly Grab <br />Oil and Grease, rag/Q Weekly Visual <br />pH, s. u. (Minimum-Maximum) Weekly /n-Situ <br />Electrical Conductivity, umho/cm Monthly Grab <br />Cadntiunt (PD), mg/2 Monthly Grab <br />Copper (PD), mg/E Monthly Grab <br />Iron (TR), mgle Monthly Grab <br />Manganese (PD), mg/2 Mondtly Grab <br />Silver (PD), rnR/2 Monthly Grab <br />Table V-7 -- Monitoring Requirements Jor Outjalls 002, 004, 006, and 008 <br />Parameter Monitoring Frequency Sample Type <br />Flow, MGD Weekly Instantaneous <br />or Continuous <br />Total Suspended Solids, mg/P Monthly Grab <br />Settleable Solids, mf/~ Monthly Grab <br />Oil and Grease, mgle Weekly Visuat <br />pH, s. u. (Minirnurn-Maximum) Weekly In-Situ <br />Electrical Conductivity, umho/cm Quanerly Grab <br />Total Iron, mA/e Monthly Grab <br />PD memos the potentially dissolved fraction, as defr«ed in the Basic Standards nttd Methodologies (or Surface Wmer (31.0). <br />TR means the torn/ recoverable fractimt, ns defined in the Basic Smndards and Merl+odologies (or Srrr(ace Wnrer (3l.0). <br />a/ If a visible st+een is noted, n grab sample slra[[ be collected and mra[yzed for oil and grease. The resu6s are m be reported on <br />the DMR corder parameter 03582. <br />Corrected JANUARY 24, 2001 <br />