06/09/2010 P&Z Packet - Laserfiche WebLink

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Attachment 1: Site Layout Performance Standards Page 6 property owner will correct erosion, maintain and replace vegetation, and remove invasive species to establish permanent vegetation according to the re- vegetation plan. vi. Disturbance is not likely to result in erosion, slope failure or a failure to establish vegetation due to existing or proposed slope, soil type, root structure or proposed construction methods. f) No above- or below- ground structure or impervious surface may be placed within the buffer or upland habitat area permanently or temporarily, except as follows: i. A public utility, or a structure associated with a public utility, may be located within a buffer or upland habitat area on a demonstration that there is no reasonable alternative that avoids or reduces the proposed buffer intrusion. The utility or structure shall minimize the area of permanent vegetative disturbance. ii. Stormwater features that are vegetated consistent with E.2.b.3.d may be located within buffer on site - specific approval. iii. Buffer or upland habitat area may enclose a linear surface no more than 10 feet in width and, for buffer, no less than 25 feet from the delineated wetland edge for non - motorized travel if wetland habitat will not be measurably reduced. Trail edge mowing is not permitted. 3. Disconnect and Distribute Stormwater. The guidelines established in this section are for the purposes of maximizing the use of pervious areas at the site to help filter and infiltrate runoff generated from impervious areas and to spread excess runoff over pervious areas. a. Compost and Amended Soils. To recover soil porosity lost due to compaction, soils should be amended to allow for adequate water holding capacity for plant growth and infiltration of runoff. b. Disconnect Impervious Surfaces. Runoff from impervious surfaces such as parking Tots, driveways, and sidewalks should be routed to adjacent pervious areas to be filtered or infiltrated into the soil. c. Rooftop Disconnection. Runoff from rooftops should be spread over lawns and other pervious areas. 4. Reduce Impervious Cover. Less impervious cover directly results in Tess stormwater runoff and pollutant loads generated at the site. Impervious surface should be reduced to the extent practical. • •