A Illustrations and Exhibits

Section 905.APPENDIX A   Illustrations and Exhibits Section 905.ILLUSTRATION M   Soil Suitability for On-Site Sewage Design Section 905.EXHIBIT A   Loading Rates in Square Feet Per Bedroom and Gallons/Square Feet/Day Design Group Soil Group (Most Limiting Layer) Minimum Separation To Limiting Layer 1 Permeability Range Size of System Residential Reg. Absorption (ft 2 /bedroom) Institutional/Commercial Allowable Application Rate (GPD/ft 2 ) I 1A NR 3 Very Rapid NR 3 NR 3 II 2A; 2B; 2K 3 feet Rapid 200 1.0 III 3B; 3K 3 feet High Moderately Rapid 220 0.91 IV 3A; 3L; 4D; 4K 3 feet Low Moderately Rapid 240 0.84 V 4A;; 4B; 4H; 4L; 5D 3 feet Very High Moderate 265 0.75 VI 4F; 4M; 5B 3 feet High Moderate 290 0.69 VII 4N; 5A; 5C; 5H; 5K; 6D 2 feet Moderate 325 0.62 VIII 4O; 5E; 5I; 5L; 6A; 6B; 6E; 6H; 6K 2 feet Low Moderate 385 0.52 IX 2 5F; 5M; 6C; 6L; 7D; 7F 2 feet High Moderately Slow 445 0.45 X 2 5G; 6F; 6I; 7E; 7C; 7H 2 feet Low Moderately Slow 500 0.40 XI 2 5N; 6G; 6J; 6M; 7F; 7I 2 feet Slow 740 0.27 XII 2 7G; 7J; 7L; 8E; 8I 2 feet Very Slow 1000 0.20 XII 2 5O; 6N; 6O; 7M; 7N; 7O; 8J; 8M; 8O NR 3 NR 3 NR 3 0.00 XIII 9 SUBSURFACE DISPOSAL NOT RECOMMENDED NOTES: 1 Limiting layers include fragipans; bedrock; compact glacial tills; seasonal high water table or other soil profile features that will materially affect the absorption of liquid from the disposal field. 2 Soils in this group are less than the minimum percolation rate established in Appendix A, Illustration H as suitable for subsurface seepage systems. 3 NR = Subsurface disposal system not recommended.