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COLORADO DEPARTMEM OF PUBLIC KEAL.TK AND ENVIRONMENT, Water Quality Con[rol Division <br />Rationale -Page 4, Permit No. CO-0000221 <br />V, PERFORMANCE H/STORY • <br />.4. bonitoring Data <br />1. Discharge Monitorin4 Renons: Tc[bles V-1 through V-7 summarise the effluen[ data reported on the quarterly <br />Discharge Monitoring Reports (DAfR's) for ourfalls 002, 003, 004, 006, 007, 008 and 009 at the Seneca Coal <br />Company facility from .lanuary 1, 1995 through December 31, 1996 (eight calendar quarters unless otherwise <br />noted). Outjalls 010 and 011 reported "no discharge" during this period. <br />Table V-I - Selj-Monitoring Results for Outjall 002 <br /> Reported 'Previous No. of . <br /> Concentrations i Permi! Limitation <br />Parameter Avg/Min/Max I Limitatiors Excursions <br />Flow, MGD <br />30day avg 0.89/0.1366/1.074 none - <br />daity max 7.32/0.1261/4.7978 none - <br />TSS, mg/P <br />30day avg 15/8/20 35 0 <br />daily max 15/8/20 70 0 <br />Total Iron, mg/f <br />30-day avg 0.11 / < 0.02/0.49 3.5 0 <br />daily max D.ll/<0.02/0.49 7.0 D <br />Oil & Grease, mg/f none visible 10 0 <br />pH, s.u. <br />Tot <br />! Dis <br />olved Solid <br />m <br />/P -/7.82/8.64 6.5-9.0 0 <br />g <br />a <br />s <br />s, <br />30-clay avg 2953/2130/3373 none - <br />daiiy max 3236/2960/3470 none - <br />Whole Effluent Toxicity, Acute <br />Ceriodaohnia so. 2 of 2 LC,,,> 100% LC<~> 100% D <br />Table V-1 -Self-Monitoring Results for Outjall 003 <br /> <br /> <br />Parameter Reported <br />Concentrations <br />Avg/Min/Max Previous <br />Permll <br />'limitation No. of <br />Limitation <br />Excursions <br />Flow, MGD <br />30-day avg 0.106/0.066/0.13/ none - <br />daih~ max 0.185/0.0977/0.2261 none - <br />TSS, mg/f <br />30-day avg 24/14/52 35 <br />daily max 24/14/52 70 0 <br />Tota! Iron, mg/f <br />30day avg 0.3210.0611.5 3.5 0 <br />dai!}~ max 0.32/0.06/7.5 7.0 0 <br />OiI & Grease, mg/f none visible ]0 0 <br />pH, s. u. -/7.55/8.64 6.5-9.0 0 <br />Total Dissolved Solids, mg/f • <br />30-day avg 2894/2167/3127 none - <br />daily mnr 3138/2820/3450 none - <br />Whole Effluent Toxicirv, Acute LC,,,> 100% 0 <br />Ceriodaohnia so. 2 0(2 LC,,,> 100% <br />