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POLLUTANT LOAD CALCULATIONS ATTACHMENT <br /> EMCS USED IN MODEL: <br /> Table 1 : Event Mean Concentrations PC-South Relief Canal Watershed <br /> Total P Total N TSS BOD <br /> Land Use EMC mg/L EMC m L EMC mg/L EMC mg/L <br /> Agricultural 0 . 14 2002 70 13 <br /> Commercial 0 .29 1 .34 88 12 <br /> Residential 1 . 05 2 .61 39 8 <br /> Industrial 0 . 31 2006 94 10 <br /> Forest/Open 0 . 05 1 .44 11 15 <br /> Institutional 0 .31 2 .07 39 8 <br /> Wetlands 0 .05 1 . 14 5 L5 <br /> Table 2 : STEPL Load Projections for PC-South Relief Canal <br /> 1r', Total..iad b vbrter >led <br /> Watershed N Load (no P Load (no 800 Load Sediment <br /> 8MP) BMP) (no BMP) Load (no <br /> --lb/year Ib/year lb/year t/year <br /> PC-South 1451960 19 , 464 666 , 393 11994 <br /> Total 145 , 9601 19t4641 666 , 393 1 , 994 <br /> 2.. Tota1, load b ,41040zu ee r rl h :e istln SNiP :_ <br /> Sources N Load P toad BOD Load Sediment <br /> (Ibtyr) Qbtyr) (Iblyr) Lead (ttyr) <br /> Urban 34 ,489 61109 120 , 671 278 <br /> Cropland 24 , 800 11971 231 , 858 217 <br /> Pastureland 29 , 067 21243 93 , 306 45 <br /> Forest 11220 43 929 1 <br /> Feedlots 0 0 0 0 <br /> User Defined 31333 11332 91418 7 <br /> Septic 322 126 11316 0 <br /> Gully 0 0 0 0 <br /> Streambank 0 0 0 0 <br /> Groundwater 0 0 0 0 <br /> Total 93 , 2321 11 , 8251 457 , 497 547 <br /> Table 3 • Comparison of Average Concentrations PC-South Relief Canal <br /> Source TP mg/L TN mg/L TSS mg/L BOD mg/L <br /> Average Average Average Average <br /> Calculated from STEPL and USGS Flow 0 . 159 1 .25 15 6 <br /> Data <br /> Field Data USGS, IRFWCD, IRC 1 0 .240 1 1905 11 1 <2 <br /> DEP Agreement No. G0353 , Attachment A, Page 9 of 12 <br />