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Septic Tank Absorption Field - Mound (MN)-8herbumeCounty, Minnesota Description "Mound septic tank absorption fields" are areas inwhich effluent from useptic tank is distributed into the mui| surface through perforated pipe. In this system the drain field is placed above the soil surface in a mound, The ratings are based on the soil properties that affect absorption of the effluent, construction and maintenance of the system, and public health. Saturated hydraulic conductivity (Kamt) is evaluated from the surface to a depth of3O centimeters. Depth to saturation and depth to bedrock are evaluated from the surface to a depth of 203 centimeters. The frequency of ponding and flooding also is evaluated. Excessive slope may cause lateral seepage and surfacing ofthe effluent indowne|ope areas. The ratings are both verbal and numerical. Rating class terms indicate the extent to which the soils are limited by all of the soil features that affect the specified use. "Not limited" indicates that the soil has features that are very favorable for the specified use. Good performance and very low maintenance can be expected. "Slightly limited" indicates that the soil has features that are favorable for the specified use. "Moderately limited" indicates that the soil has features that are moderately favorable for the specified use. The limitations can be overcome or minimized by special planning, design, or installation. Good performance and moderate maintenance can be expected. "Very limited" indicates that the soil has one or more features that are unfavorable for the specified use. The limitations generally cannot be overcome without special design or expensive installation procedures. "Extremely limited" indicates that the moil has one ormore features that are very unfavorable for the specified use. The limitations generally cannot be overcome. Numerical ratings indicate the severity of individual limitations. The ratings are shown as decimal fractions ranging from 0.01 to 1.00. They indicate gradations between the point at which a soil feature has the greatest negative impact on the use (1.UO) and the point atwhich the soil feature ianot alimitation (0.0O). The components listed for each map unit inthe accompanying Summary byMap Unit table in Web Soil Survey or the Aggregation Report in Soil Data Viewer are determined bythe aggregation method chosen. Anaggregated rating class |o shown for each map unit. The components listed for each map unit are only those that have the same rating class aethe one shown for the map unit. The percent composition of each component in a particular map unit is given to help the user better understand the extent to which the rating applies to the map unit. Other components with different ratings may occur in each map unit. The ratings for all components, reQard|eoatheaggregatedrahngnfthamopunit,msnbe viewed by generating the equivalent report from the Soil Reports tab in Web Soil Survey or from the Soil Data Mart site. Onsite investigation may be needed to validate these interpretations and to confirm the identity of the soil on a given Aggregation Method: Dominant Condition usDA Natural Resources Web Soil Survey 5/18/2022 �� Conservation Service National Cooperative Soil Survey Page 4of5