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Soils <br /> The Natural Resource Conservation Service Web Soil Survey notes the following soil <br /> types on the project site: <br /> Isanti fine sandy loam: hydrologic group B/D soil, hydric, moderately rapid to rapid <br /> permeability, and very poorly drained. <br /> Lino loamy fine sand: hydrologic group A, non-hydric, and somewhat poorly drained. <br /> Zimmerman fine sand: hydrologic group A soil, non-hydric, and excessively drained <br /> with rapid permeability and negligible to low surface runoff. <br /> Five soil borings to depths of 14.5 feet are planned. One of these borings will be in the <br /> location of the infiltration basin, the other four at building corners. <br /> The area of the stormwater infiltration basin appears to have rapid permeability and is not <br /> in a Drinking Water Supply Management Area (DWSMA). The site should be suitable <br /> for infiltration, but this will be reviewed further by the City Engineer and RCWD. <br /> Stormwater Management <br /> A stormwater management plan has been submitted and is being reviewed by the City <br /> Engineer. The following summary review is based upon the Stormwater Management <br /> Site Plan Review. <br /> Existing Conditions <br /> Runoff from the 12 storage buildings and paved drives on the north portion of the site is <br /> currently managed by an infiltration basin on the west portion of the site, and a wetland <br /> along the west perimeter. <br /> Proposed Conditions <br /> Under the proposed conditions, there will be an additional 57,954 sf feet (1.33 acres) of <br /> impervious surface. This will bring the total impervious surface at the site to 147,885 sf <br /> (3.39 acres). The total site area is 249,763 sf(5.73 acres). This is approximately 59% <br /> impervious surface. The L1-Light Industrial zoning district allows for 75% impervious <br /> surface,but Shoreland District allows for 60% impervious surface. The site appears meet <br /> these requirements. <br /> The runoff from the additional impervious surface will be managed with a bio-filtration <br /> basin on the west portion of the site abutting the wetland. The new basin will overflow to <br /> 3 <br />