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• • • 2) All pump islands shall be set at least thirty (30) feet back from any property line. Additionally, the setback between the pump islands curb face must be at least twenty -four (24) feet. • The pump islands are properly elevated and set back both from each other and from property lines. e. Dust Control and Drainage. The entire site other than taken up by a building, structure, or plantings shall be surfaced with asphalt, concrete, cobblestone, or paving brick. Plans for surfacing and drainage shall be subject to approval of the City Engineer. Drainage from all fueling areas shall be directed to an oil /grit separator. Minimum design standards for the oil /grit separator shall include the following: 1) A minimum of four hundred (400) cubic feet of permanent pool storage capacity per acre of drainage area. 2) A minimum pool depth of four (4) feet. 3) A minimum oil containment capacity of eight hundred (800) gallons. 4) Minimum maintenance /inspection of two (2) times per year and /or after measurable spill events. A measurable spill shall be defined by the Minnesota Pollution Control Agency (MPCA). Any measurable spill event must be reported to the MPCA. • The submitted plans include an oil /grit separator. Plans received on September 1 include a trench drain that directs runoff to the separator. • The plan includes an infiltration basin. The site currently drains directly into the road ditches. With the increase in impervious surface, it's a good idea to infiltrate some runoff. As with any new stormwater facility, the City requires an agreement that the basin be maintained. • No Rice Creek Watershed permit is required for this project. f. Landscaping. 1) At least twenty -five (25) percent of the lot, parcel or tract of land used exclusively for the gas sales facility shall remain as a grass plot, including trees, shrubbery, plantings or fencing and shall be landscaped. Required minimum green area should be emphasized in the front and side yards abutting streets or residential property. 2) At the boundaries of the lot, the following landscape area shall be required: P78