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7C, Final Draft of I&I Report
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7C, Final Draft of I&I Report
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Final Draft of I&I Report
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Agenda Item
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3/31/2008
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<br />FIGURE 12 ESTIMATION OF INFilTRATION I INFLOW <br /> <br />Meter Shed <br /> <br />IM059 <br /> <br />11491 <br />142.5 In-ml <br /> <br />Estimated Residential Equivalent Connections <br />Inch Miles of Sewer pipe (w/o services) <br /> <br />Method 1 - Assume no 1/1 in January <br /> <br />Monthly Flow Data (mgd) <br /> <br /> Annual January Peak Mo. <br /> Average I <br />2004 0.317 0.313 0.371 June <br />2005 0.312 0.310 0.337 Oct <br />2006 0.286 0.321 0.380 May <br /> <br />1/1 <br />(mgd) <br />0.004 <br />0.002 <br /> <br />(MG annual) (%) <br />1.46 1.260;'; <br />0.73 0.64% <br />0.00% <br />0.63% <br /> <br />2.19 <br />1,543 <br />3,379 <br />1,126 <br /> <br />Calculated GPD per connection <br /> <br />2006 rate $ <br />Total Cost $ <br />Annual $ <br /> <br /> Annual January pejk Mo. <br /> Average <br />2004 276 272 323 <br />2005 272 270 293 <br />2006 249 279 331 <br /> <br />Method 2 - Assume early morning low flow is entirely inflitration (clear water) <br /> <br />May - September 2007 <br />8/30/2007 Daily Flow <br />Dry Day - Early Morning Flow <br />Net Wastewater <br /> <br />230,000 Igpd <br />100,800 gpd <br />129,200 gpd <br /> <br />4,200 Igph <br /> <br />Infiltration rate: <br /> <br />(EMF/in mil <br /> <br />707 gpd/in mi <br /> <br />Wastewater per connection: <br /> <br />112 gpd/connection <br /> <br />Peak Flow 9/20/07 <br /> <br />Inflow per connection <br /> <br />57,398 gph 1.378 mgd <br />10,465 gph 0.251 mgd <br />46,933 gph 1.126 mgd <br /> 0.320 <br /> 1.45 Imgd <br /> 6.30 <br />980 gpd/connection <br />7,905 gpd/in mi <br /> <br />Peak Hour Rate: 20:00 hrs <br />Dry day flow at time <br />INflOW <br /> <br />Normal Peak <br />Adjusted Peak <br />Calc. PIA Ratio <br /> <br />Inflow per in mile <br /> <br />M059 <br />
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