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45 INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS 7080.2150 <br />USDA soil texture <br />Sand, coarse <br />sand, loamy sand, <br />loamy coarse sand, <br />fine sand, very <br />fine sand, loamy <br />fine sand, loamy <br />very fine sand, <br />35 to 50% rock <br />fragments <br />Sand, coarse sand, <br />loamy sand, loamy <br />coarse sand, <35% <br />rock fragments <br />Fine sand, very fine <br />sand, loamy fine <br />sand, loamy very <br />fine sand, <35% <br />rock fragments <br />Sandy loam, coarse <br />sandy loam, fine <br />sandy loam, very <br />fine sandy loam <br />Sandy loam, coarse <br />sandy loam, fine <br />sandy loam, very <br />fine sandy loam <br />Loam <br />Loam <br />Soil structure and <br />grade <br />Single grain, <br />granular, blocky, or <br />prismatic structure; <br />weak grade <br />Single grain, <br />granular, blocky, or <br />prismatic structure; <br />weak grade <br />Single grain, <br />granular, blocky, or <br />prismatic structure; <br />weak grade <br />Granular, blocky, <br />or prismatic <br />structure; weak <br />to strong grade <br />Platy with weak <br />grade or massive <br />Granular, blocky, <br />or prismatic <br />structure; weak <br />to strong grade <br />Platy with weak <br />grade or massive <br />Treatment <br />Level C <br />Absorption <br />area loadin <br />rate (gpd/ft ) <br />** <br />1.2 <br />0.6 <br />0.78 <br />0.68 <br />0.6 <br />0.52 <br />Treatment <br />Level C <br />Mound <br />absorption <br />ratio <br />1.0 <br />1.0 <br />2.0 <br />1.5 <br />1.8 <br />2.0 <br />2.3 <br />Treatment <br />Level A, A-2, <br />B, B-2 <br />Absorption <br />area loadin <br />rate (gpd/ft ) <br />** <br />1.6 <br />1.0 <br />1.0 <br />0.87 <br />0.78 <br />0.68 <br />Treatment <br />Level A, A-2, <br />B, B-2 <br />Mound <br />absorption <br />ratio * * * <br />1.0 <br />1.0 <br />1.6 <br />1.6 <br />1.8 <br />2.1 <br />2.4 <br />Copyright ©2014 by the Rev <br />so <br />of Statutes, State of Minnesota. All Rights Reserved. <br />