HRS Rule, Table 4-4, Page 51611
| Surface soil description | Soil group designatione |
|---|---|
| Coarse-textured soils with high infiltration rates (for example, sands, loamy sands). | A |
| Medium-textured soils with moderate infiltration rates (for example, sandy loams, loams). | B |
| Moderately fine-textured soils with low infiltration rates (for example, silty loams, silts, sandy clay loams) | C |
| Fine-textured soils with very low infiltration rates (for example, clays, sandy clays, silty clay loams, clay loams, silty clays); or impermeable surfaces (for example, pavement). | D |
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