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Interpretive Categories Limitation Suitability Slight Good Moderate Fair Severe Poor Definition Slight soil limitations that can be readily and economically overcome.- Moderate limitations that can normally be overcome with proper planning, care- ful design, and average management. Limitations are difficullto overcome. Will be costly to everyone. if possible at all. Above average design. planning, and management are required. If the ratings are other than slight, they are warnings that problems may result unless proper precautions are taken. fined for a given use. For example, soil ratings, in terms oflimitations for septic tank absorption fields, shown in Table 1. Following is an example of one way in which interpre- tive analyses are presented. For each soil property, descriptive or quantitative guides or standards are de- From the mapping unit and soil series description one can determine the suitability of various soils as for different uses. Table 1. Soil Limitation Classes for Septic Tanks Absorption Fields Soil Properties Soil Ratings in Terms of Limitations Slight Moderate Severe Permeability class Rapid, Lower end Moderately Moderately of moder- slow and rapid, and ate slow upper end of moderate Hydraulic conductivity More than 1.0 to 0,60 inch/hr. Less than 0.60 rate 1.0 inch! inch/he. (Uhland core procedurellr. Percolation rate Faster than 45 to 60 min,/inch Slower than (Post hole procedure) 45.0 min.! 60 min.! inch inch Depth to water table Over 60 Over 60 inches Less than 60 inches Not subject inches Flooding hazard Nol subject to floodi ng 8 to 15 Subject to to flooding percent flooding Slopes 0108 Over 60 inches More than 15 percent percent Depth to hard rock. Over 60 Less than 60 bedrock. or other inches inches impervious materials 16 .....