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Collection System Collaborative Benchmarking Group <br />Best Practices for Sanitary Sewer Overflow (SSO) Prevention and <br />Response Plan <br />Attachment D - Sample Templates for SSO Volume Estimation <br />TABLE 'A' <br />Height of <br />spout above <br />M/H rim <br />H in inches <br />S S O FLO <br />a <br />Min. Sewer <br />size in which <br />these flows <br />1/4 <br />1 <br />0.001 <br />1/2 <br />3 <br />0.004 <br />3/4 <br />6 <br />0.008 <br />1 <br />9 <br />0.013 <br />1 1/4 <br />12 <br />0.018 <br />1 1/2 <br />16 <br />0.024 <br />1 3/4 <br />21 <br />0.030 <br />2 <br />25 <br />0.037 <br />21/4 <br />31 <br />0.045 <br />21/2 <br />38 <br />0.054 <br />2 3/4 <br />45 <br />0.065 <br />3 <br />54 <br />0.077 <br />31/4 <br />64 <br />0.092 <br />31/2 <br />75 <br />0.107 <br />3 3/4 <br />87 <br />0.125 <br />4 <br />100 <br />0.145 <br />41/4 <br />115 <br />0.166 <br />41/2 <br />131 <br />0.189 <br />4 3/4 <br />148 <br />0.214 <br />5 <br />166 <br />0.240 <br />51/4 <br />185 <br />0.266 <br />51/2 <br />204 <br />0.294 <br />5 3/4 <br />224 <br />0.322 <br />6" <br />6 <br />244 <br />0.352 <br />61/4 <br />265 <br />0.382 <br />61/2 <br />286 <br />0.412 <br />6 3/4 <br />308 <br />0.444 <br />7 <br />331 <br />0.476 <br />71/4 <br />354 <br />0.509 <br />71/2 <br />377 <br />0.543 <br />7 3/4 <br />401 <br />0.578 <br />8" <br />8 <br />426 <br />0.613 <br />81/4 <br />451 <br />0.649 <br />81/2 <br />476 <br />0.686 <br />8 3/4 <br />502 <br />0.723 <br />9 <br />529 <br />0.761 <br />kiffaaM�7 <br />Height of <br />spout above <br />M/H rim <br />H in inehecp <br />S S O FLOW <br />a <br />Min. Sewer <br />size in which <br />these flows <br />are possible <br />1/4 <br />1 <br />0.002 <br />1/2 <br />4 <br />0.006 <br />3/4 <br />8 <br />0.012 <br />1 <br />13 <br />0.019 <br />1 1/4 <br />18 <br />0.026 <br />11/2 <br />24 <br />0.035 <br />1 3/4 <br />31 <br />0.044 <br />2 <br />37 <br />0.054 <br />21/4 <br />45 <br />0.065 <br />21/2 <br />55 <br />0.079 <br />2 3/4 <br />66 <br />0.095 <br />3 <br />78 <br />0.113 <br />31/4 <br />93 <br />0.134 <br />31/2 <br />109 <br />0.157 <br />3 3/4 <br />127 <br />0.183 <br />4 <br />147 <br />0.211 <br />41/4 <br />169 <br />0.243 <br />41/2 <br />192 <br />0.276 <br />4 3/4 <br />217 <br />0.312 <br />6" <br />5 <br />243 <br />0.350 <br />51/4 <br />270 <br />0.389 <br />51/2 <br />299 <br />0.430 <br />5 3/4 <br />327 <br />0.471 <br />6 <br />357 <br />0.514 <br />61/4 <br />387 <br />0.558 <br />8" <br />61/2 <br />419 <br />0.603 <br />6 3/4 <br />451 <br />0.649 <br />7 <br />483 <br />0.696 <br />7 1 /4 <br />517 <br />0.744 <br />71/2 <br />551 <br />0.794 <br />7 3/4 <br />587 <br />0.845 <br />10" <br />8 <br />622 <br />0.896 <br />81/4 <br />659 <br />0.949 <br />81/2 <br />697 <br />1.003 <br />8 3/4 <br />734 <br />1.057 <br />9 <br />773 <br />1.113 <br />Disclaimer: <br />This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer, P.E. No. 33955, <br />California, for County Sanitation District 1. This table is provided as an example. Other Agencies <br />may want to develop their own estimating tables. <br />19F-93 <br />