Design sewers for the ultimate future population that may be served.
- (1) Consider the maximum hourly domestic flow, industrial flow, inflow and infiltration and the topography regarding the slope and pumping needs.
- (2) Design for an average daily per capita flow of 100 gpd, which includes normal infiltration. Peak design flow must be based on an acceptable infiltration/inflow (I/I) study or, for new sewer extensions, the ratio of peak to average daily flow from a widely recognized engineering standard.
- (3) Exclude storm water from roof drains, streets and other areas.
Added at 17 Ok Reg 1140, eff 6-1-00
Amended at 23 Ok Reg 937, eff 6-15-06