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Table 17.6. Average Annual Total Phosphorus in runoff leaving RTC site <br />lbs TP/yr <br />lbs TP/ac-yr <br />With storage in <br />the central <br />corridor <br />With additional on -site storage <br />19.6 <br />0.053 <br />10.3 <br />0.028 <br />The modeled phosphorus removals are contained in Table 17.7. These results are <br />presented to show the reductions that the water quality treatment system used on the RTC <br />site can achieve. <br />Table 17.7. Total phosphorus load (lbs/yr) entering and exiting several of the major <br />proposed detention basins and infiltration basins. <br />BMP and Sub - <br />watershed (see <br />Figure 12.1) <br />With central corridor <br />facilities only <br />lbs TP/yr <br />With additional on -site storage <br />Detention basin in In <br />sub -watershed 7 <br />27.3 15.6 <br />Out 10.2 <br />Infiltration basin in In 31.5 <br />sub -watershed 8 <br />Out 0 <br />Detention basin in In 35.2 <br />sub -watershed 18 <br />Out 9.5 <br />Infiltration basin in In 32.1 <br />sub -watershed 19 <br />4.3 <br />16.0 <br />0 <br />20.4 <br />3.7 <br />16.9 <br />Out 0 0 <br />Detention basin in In 64.6 34.6 <br />sub -watershed 25 <br />Out 38.4 20.2 <br />Detention basin in In 38.4 20.2 <br />sub -watershed 26 <br />(south of TH 10) <br />Out 24.0 12.6 <br />Infiltration basin in In 24.0 12.6 <br />sub -watershed 26 <br />(south of TH 10) <br />Out 18.9 9.5 <br />17-13 <br />