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special planning, design, or installation. Fair performance and moderate <br />maintenance can be expected. "Very limited" indicates that the soil has one or more <br />features that are unfavorable for the specified system. The limitations generally <br />cannot be overcome without major soil reclamation, special design, or expensive <br />installation procedures. Poor performance and high maintenance can be expected. <br />Numerical ratings indicate the severity of individual limitations. The ratings are <br />shown as decimal fractions ranging from 0.01 to 1.00. They indicate gradations <br />between the point at which a soil feature has the greatest negative impact on the <br />specified system (1.00) and the point at which the soil feature is not a limitation <br />(0.00). <br />The accompanying Summary by Map Unit table in Web Soil Survey or the <br />Aggregation Report in Soil Data Viewer lists the map unit components. These <br />components are determined by the aggregation method chosen. An aggregated <br />rating class is shown for each map unit. The components listed for each map unit <br />are only those that have the same rating class as the one listed for the map unit. <br />The percent composition of each component in a particular map unit is shown to <br />help the user better understand the percentage of each map unit that has the rating <br />indicated. Other components with different ratings may occur in each map unit. <br />The complete ratings list for all components, regardless of the map unit aggregated <br />rating, can be viewed by generating the equivalent report from the Soil Reports tab <br />in Web Soil Survey or from the Soil Data Mart site. Onsite investigation may be <br />needed to validate these interpretations and to confirm the identity of the soil on a <br />given site. <br />Custom Soil Resource Report <br />47