Authority: IC 16-19-3-4; IC 16-19-3-5
Affected: IC 16-19-3-4
Sec. 70.
If site conditions are acceptable, subsurface trench soil absorption systems are the systems of choice.
Table IV - Soil Loading Rates for Subsurface Trench On-Site Sewage Systems (in gpd/ft2) | ||||||||
SOIL STRUCTURE CLASSES | ||||||||
SOIL TEXTURE CLASSES | Single Grain | Granular | Strong: Angular, Sub-Angular Blocky, Prismatic | Moderate: Angular, Sub-Angular Blocky, Prismatic | Weak: Angular, Sub-Angular Blocky, Prismatic; Platy1 | Fragic Characteristi cs: Very Coarse Prismatic | Structurele ss, Massive, Friable, V. Friable | Structureless, Massive, Compact, Firm, V. Firm; Platy2 |
Gravel, Coarse Sand | >1.20 | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
Loamy Coarse Sand, Medium Sand | 1.20 | 1.20 | N/A | N/A | 1.20 | N/A | N/A | N/A |
Fine Sand, Loamy Sand, Loamy Fine Sand | 0.75 | 0.60 | N/A | 0.75 | 0.75 | N/A | 0.75 | N/A |
Very Fine Sand, Loamy V. Fine Sand | 0.50 | 0.50 | N/A | 0.75 | 0.60 | N/A | 0.60 | N/A |
Sandy Loam, Coarse Sandy Loam | N/A | 0.75 | N/A | 0.60 | 0.60 | 0.00 | 0.60 | 0.00 |
Fine Sandy Loam, V. Fine Sandy Loam | N/A | 0.75 | N/A | 0.60 | 0.60 | 0.00 | 0.60 | 0.00 |
Loam | N/A | 0.75 | 0.75 | 0.50 | 0.50 | 0.00 | 0.50 | 0.00 |
Silt Loam, Silt | N/A | 0.75 | 0.75 | 0.50 | 0.30 | 0.00 | 0.30 | 0.00 |
Sandy Clay Loam | N/A | 0.60 | 0.60 | 0.50 | 0.30 | 0.00 | 0.30 | 0.00 |
Silty Clay Loam, Clay Loam, Sandy Clay | N/A | 0.60 | 0.60 | 0.30 | 0.25 | 0.00 | 0.25 | 0.00 |
Silty Clay, Clay | N/A | 0.60 | 0.50 | 0.30 | 0.25 | N/A | 0.25 | 0.00 |
Organic Soil Materials | N/A | N/A | N/A | N/A | N/A | N/A | 0.00 | N/A |
Limnic Soil Materials | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.00 |
Bedrock | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |
N/A NOT APPLICABLE | ||||||||
1Naturally occurring platy structure. | ||||||||
2Platy structure caused by mechanical compaction has a soil loading rate of 0.00 gpd/ft2 unless broken up by methods approved by the department. |
410 IAC 6-8.3-70