Appendix 75-A.8 - Conventional subsurface treatment systems | New York Codes, Rules and Regulations

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TABLE 4B APPLICATION RATES FOR NON-STANDARD DESIGN FLOWS
Percolation Rate (minutes/inch)	Application Rate (gal/day/sq. ft.)
1 - 5	1.20
6 - 7	1.0
8 - 10	0.90
11 - 15	0.80
16 - 20	0.70
21 - 30	0.60
31 - 45	0.50
46 - 60	0.45
Soil with a percolation rate of less than 1 minute/inch is unsuitable for a conventional system
Required Area (sq. ft.) = Flow Rate (GPD)/Application Rate (GPD/sq. ft.)
Required Absorption Trench Length = Required Area (GPD)/2 feet (trench width)