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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 />ESTIMATED SSO FLOW OUT OF M/H WITH COVER IN PLACE <br />24" COVER36" COVER <br />Height ofMin. SewerHeight ofMin. Sewer <br />spout aboveS S O FLOWsize in whichspout aboveS S O FLOWsize in which <br />M/H rimthese flowsM/H rimthese flows <br />QQ <br />in gpmin MGDin gpmin MGD <br /> in inchesare possiblein inchesare possible <br />HH <br /> 1/410.001 1/410.002 <br /> 1/230.004 1/240.006 <br /> 3/460.008 3/480.012 <br />190.0131130.019 <br />1 1/4120.0181 1/4180.026 <br />1 1/2160.0241 1/2240.035 <br />1 3/4210.0301 3/4310.044 <br />2250.0372370.054 <br />2 1/4310.0452 1/4450.065 <br />2 1/2380.0542 1/2550.079 <br />2 3/4450.0652 3/4660.095 <br />3540.0773780.113 <br />3 1/4640.0923 1/4930.134 <br />3 1/2750.1073 1/21090.157 <br />3 3/4870.1253 3/41270.183 <br />41000.14541470.211 <br />4 1/41150.1664 1/41690.243 <br />4 1/21310.1894 1/21920.276 <br />4 3/41480.2144 3/42170.3126" <br />51660.24052430.350 <br />5 1/41850.2665 1/42700.389 <br />5 1/22040.2945 1/22990.430 <br />5 3/42240.3226"5 3/43270.471 <br />62440.35263570.514 <br />6 1/42650.3826 1/43870.5588" <br />6 1/22860.4126 1/24190.603 <br />6 3/43080.4446 3/44510.649 <br />73310.47674830.696 <br />7 1/43540.5097 1/45170.744 <br />7 1/23770.5437 1/25510.794 <br />7 3/44010.5788"7 3/45870.84510" <br />84260.61386220.896 <br />8 1/44510.6498 1/46590.949 <br />8 1/24760.6868 1/26971.003 <br />8 3/45020.7238 3/47341.057 <br />95290.76197731.113 <br /> <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 /> <br />