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<br />RCWD Alternative Compliance Sequencing Report <br />City of St. Anthony Village PAGE 11 <br />WSB Project No. 1626-53 <br /> <br />4. Miscellaneous Public Works Efforts <br />In addition to the soil observations listed above, City Staff routinely observe <br />soils when constructing, maintaining and repairing City infrastructure such as <br />sanitary sewer, sidewalk panels, electric, and irrigation systems. Staff has <br />reported that throughout all of these efforts, no sandy native soils, or other soils <br />suitable for infiltration have been encountered. <br /> <br />5. Twin Cities Army Ammunition Plant Study <br />A geotechnical report was prepared for the Twin Cities Army Ammunition <br />Plant (TCAAP) site. This report indicates that clay soils are present at the <br />surface throughout the City of St. Anthony to depths ranging from 25 to 90 feet <br />deep. See Appendix D for the Figure provided in the TCAAP Study. <br /> <br />The soil information presented above thoroughly documents that no options for <br />conventional infiltration BMPs exist within the City. <br /> <br />B. Water Reuse <br />The City has also explored options for non-traditional infiltration BMPs. This led <br />to the construction of a water reuse / irrigation system that was installed at Central <br />Park. The City has investigated other potential sites for water reuse projects but <br />additional locations for this type of project within the City were not feasible due to <br />several factors including: <br /> <br /> Irrigation area too small <br /> Incompatible with land use <br /> Runoff volume too low <br /> Limited public land <br /> <br />Therefore, opportunities for water reuse BMPs have been exhausted at this time. <br /> <br />C. Biofiltration <br />The City has constructed or plans to construct biofiltration / filtration BMPs where <br />this type of BMP was identified to be potentially effective. The existing and <br />proposed BMPs of this type are discussed under Section IV of this Report. <br /> <br />Additional opportunities for biofiltration BMPs beyond those identified are limited <br />and generally not possible within the public properties. This is due to several site <br />constraints that are present on future linear improvement projects undertaken by the <br />City including the following: <br /> <br /> Space Constraints <br />Narrow right of way and limited public property are available to treat public <br />drainage. The only space even available for the depressional storage needed <br />is on boulevards adjacent to the streets. However, for many numerous