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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />.. c, C l. oj. '7 <br />.'. . <br />'-....... ,.. <br /> <br />10 <br /> <br />CENTRAL PLANT <br />70 "'GO NITRIFIED EFFLUENT <br />115 "'GO SECONOARY EFFLUENT <br /> <br />. <br /> <br />- <br />:::::: <br />Cl <br />E <br />- <br /> <br />i s <br />Cl <br />~ <br />o <br />" <br />Cl . <br />> <br />'0 <br />CII <br />en Intrll <br />C 'ont <br />2 <br /> <br /> <br />... <br />Srlnlnet' <br />Dllch <br /> <br /> <br />STllEAM <br />STANDARD <br />AVERAGE 0.0, <br /> <br />... <br />Fulton <br />Qllc~ <br /> <br />...... ... <br /> <br />... <br /> <br />... <br /> <br />... <br /> <br />78th S&\h McKay <br /> <br />12"" <br /> <br />'601~ <br /> <br />Ft Lupton <br /> <br />o <br />o <br /> <br />5 <br /> <br />10 <br /> <br />15 <br /> <br />20 <br /> <br />25 <br /> <br />30 <br /> <br />Miles below Burlington Ditch Headgate <br /> <br />Figure ES-2 Segment 15 DO Profile (July) J South. Platte River <br /> <br />CDM <br /> <br />standard deliciencies could still occur for short river reaches near 88th A venue and just above the <br />Fulton Ditch diversion, even though river water quality would otherwise be improved. <br /> <br />Model analyses further suggest that sediment oxygen demand, in addition to natural biological' <br />conversion of ammonia to nitrate, is a significant source of oxygen demand in Segment 15,. Sedimen;. <br />oxygen demand is exerted in bottom (benthic) deposits that predominate in large slow-moving pools in <br />the river such as those found above and below 88th Avenue and above the Fulton Ditch diversion. <br />Suspended solids in the District's effluent probably contribute to these benthic depositS, <br /> <br />D-5 <br />