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§78-1605 ORONO CITY CODE for a one-time planting of an annual e. Native prairie grasses and forbs shall nurse or cover crop such as oats or be planted by a qualified contractor. rye. f. No fertilizer shall be used in estab- b. The seed mix to be used shall consist lishing new buffer zones, except on of at least 12 pounds pure live seed highly disturbed sites when deemed (PLS)per acre of native prairie grass necessary to establish acceptable seed and five pounds PLS per acre of buffer vegetation and then limited to native forbs. Native prairie grass amounts indicated by an accredited and native forb mixes shall contain soil testing laboratory. no fewer than four and five species g. All seeded areas shall be mulched respectively. immediately with clean straw at a rate of one and one-half tons per c. The annual nurse or cover crop shall acre.Mulch shall be anchored with a be applied at a rate of 20 pounds per disk or tackifier. acre. h. Buffer areas (both natural and cre- d. Native shrubs and or trees may be ated),shall be protected by silt fence used in addition to forbs and grasses. during construction and the fence Shrubs shall be distributed so as to shall remain in place until the area provide a natural appearance and crop is established, and at that time shall not be planted in rows. the fence shall be removed. (c) Buffer area widths will be based on the wetland protection strategies established in the Orono Surface Water Management Plan(SWMP)(December 2002).A protection classification has been assigned to each wetland in Orono based on the stormwater susceptibility and functional assessment for each wetland. The four protection classifications are described as follows: Protection Susceptibility Classification Rating Description "Preserve" Highly Highly susceptible to both quantity and quality impacts from runoff; Susceptible have the highest degree of protection "Manage 1" Moderately Moderately susceptible to quantity and quality impacts;protection is less Susceptible stringent than Preserve, provides protection to maintain their charac- teristics "Manage 2" Slightly Less stringent protection than Manage 1 wetlands; maintenance of Susceptible characteristics is desirable "Manage 3" Least Wetlands are significantly degraded (e.g., cultivated or canary grass Susceptible monotype) or lack of wetland characteristics; not typically impacted by runoff;nno quantity and only limited quality treatment of runoff is ed The protection classification for each wetland will be found on the "Wetland Management Classifica- tion Map&List"which is hereby adopted by reference,a copy of which shall be kept on file in the office of the city clerk and shall be available for public review during all normal office hours. The following are the required buffer area widths for each protection classification: Width of Buffer Area from Additional Protection Requirements Protection Wetland B=Bounce =Change in water level due to runoff event) Classification Boundary (P=Phosphorus) "Preserve" 50 feet B: Maintain bounce at or below existing conditions P: Limit loadings to predevelopment loading(0.14 LbsJAc/Yr) Supp.No.3 CD78:236