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d. Native shrubs and or trees may be used in addition to forbs and grasses. Shrubs <br /> shall be distributed so as to provide a natural appearance and shall not be <br /> planted in rows. <br /> e. Native prairie grasses and forbs shall be planted by a qualified contractor. <br /> f. No fertilizer shall be used in establishing new buffer zones, except on highly <br /> disturbed sites when deemed necessary to establish acceptable buffer <br /> vegetation and then limited to amounts indicated by an accredited soil testing <br /> ' laboratory. <br /> g. All seeded areas shall be mulched immediately with clean straw at a rate of one <br /> and one-half tons per acre. Mulch shall be anchored with a disk or tackifier. <br /> h. Buffer areas (both natural and created), shall be protected by silt fence during <br /> . construction and the fence shall remain in place until the area crop is <br /> established, and at that time the fence shall be removed. <br /> (c) Buffer area widths will be based on the wetland protection strategies established in the <br /> Orono Surface Water Management Plan (SWMP) (December 2002). A protection classification has been � <br /> assigned to each wetland in Orono based on the stormwater susceptibility and functional assessment for � <br /> each wetland. The four protection classifications are described as follows: � <br /> Protection Susceptibility Rating Description � <br /> Classification <br /> "Preserve" Highly Susceptible Highly susceptible to <br /> both quantity and <br /> quality impacts from <br /> runoff; have the <br /> . highest degree of <br /> rotection <br /> "Manage 1" Moderately Moderately <br /> Susceptible susceptible to quantity <br /> and quality impacts; <br /> protection is less <br /> � stringent than <br /> Preserve, provides <br /> protection to maintain <br /> their characteristics <br /> "Manage 2" . Slightly Susceptible Less stringent <br /> protection than <br /> Manage 1 wetlands; <br /> maintenance of <br /> � characteristics is <br /> desirable <br />