10/30/2002 Env Bd Packet - Laserfiche WebLink

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A Maintenance Plan should be submitted with the BMP Plan. (Attachment 11). • The landscape plan seems to have appropriate materials. All soil areas in the landscape, and surface water treatment train, should follow written and approved BMP's. There are no trees that will be saved on this site. The City native plant seed schedule (attachment 12), should be used in and around the basins and swales, unless cultured sod appearance is desired in front. All sod areas must be irrigated. • Lighting should be low- impact, downward focused, low- spill, flush mounted lens design. • Amur maple and Honeysuckle should be changed to non - invasive species. • Any changes to soils (importing or exporting soils) should be approved by City Staff. Recommendation by Donlin, Second by O'Dea to table until redesigned and the Environmental Board has a chance to review again. If the Environmental Board does not have a chance to review again, than the above listed review comments should be addressed. Analysis: Surface Water The recommendation to provide for 3 -foot separation between seasonally high water and the bottoms of infiltration basis remains the same. The applicant has not demonstrated any difference in these elevations. There are additional pervious pavement features added to the site plan. However, Guidelines from Barr Engineering /Met Council (attachment 1), recommend that infiltration not be used on commercial sites, and only used if adequate separation can be provided in the design of the basins, and only after a soil sensitivity study has been performed. Fortunately, this sensitivity study is done for Lino Lakes soils. This area is defined as highly sensitive to ground water pollution. MPCA 2000, Chapter 11 Urban Runoff (attachment 2), states that Minnesota state laws (Minn.R.ch.7060) prohibits the direct discharge of untreated stormwater to the saturated zone if the discharge threatens the ground water from potential pollutants. A minimum requirement for this site should be those of the MPCA standards for on site septic systems. This requirement calls for a 3 -foot separation between the bottom of the septic system and the seasonally high