Appendix 75-A.3 - Sewage flows
Effective Date
Section 75-A.3 Sewage flows.
(a) Roof, footing, garage, cellar and surface water drainage must be excluded from the system. Water softener, water recharge and backwash wastes normally are not to be discharged to the system unless a separate subsurface discharge to an area 250 feet from wells or water courses is unavailable.
(b) Designs for new construction shall be based upon a minimum daily flow of 110 gallons per day per bedroom. Other design flows listed in Table 1 may be applicable for systems receiving wastewater from dwellings equipped with older plumbing fixtures or waterless toilets.
|
TABLE 1 DAILY DESIGN FLOWS |
|
|
Plumbing Fixtures (based on manufactured date) |
Minimum Design Flow (gallons per day per bedroom) |
|
Post-1994 Fixtures 1.6 gallons/flush toilets 2.5 gallons/minute faucets & showerheads |
110 |
|
Pre-1994 Fixtures 3.5 gallons/flush toilets 3.0 gallons/minute faucets & showerheads |
130 |
|
Pre-1980 Fixtures 3.5+ gallons/flush toilets 3.0+ gallons/minute faucets & showerheads |
150 |
|
Waterless Toilets (e.g. composter) (graywater discharge only) |
75 |