Ordinance No. 20224 - Laserfiche WebLink

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hazardous chemicals to the maximum extent practicable prior to discharge. The e of treatment and degree of water quality improvement shall be � � q ty p approved by the city manager or decision- maker. (c) To the maximum extent practicable, new development shall utilize measures to limit post - construction runoff rate, timing and volume for 2, 5, and 10 year storm events to pre -- development levels for discharges into areas with the IWB or /WP overlay zone, or protected wetlands or waterways, which includes , those designated for protection in a locally adopted plan. These measures may include on -site detention or retention ponds, infiltration areas or other measures approved by the city manager or d ecision-maker. (d) Porous paving treatments or other infiltration devices approved by the planning director or decision -maker shall be used where practicable. As used herein, the term "porous paving" refers to recognized systems utilizing paving blocks (e.g., "grasscrete "). For the purposes of this provision, gravel surfaces are not acceptable. (5) Impervious Surfaces: (a) Impervious surfaces are prohibited unless they are part of a permitted use or approved conditional use. (b) Impervious surfaces that are part of a permitted use or approved conditional use shall be no larger than the minimum necessary for the proposed use and shall be located as far from wetlands and water features as practicable. (6) Construction Practices: (a) Within the NR zone and areas with the1WB overlay zone, construction or other use of heavy machinery is prohibited or restricted as described in this subsection. Use of heavy machinery is prohibited: 1. Between February 20 andJune 34 of the same year Within 300 feet of any significant waterfowl nesting areas identified in adopted plans or policies or by the Oregon Department of Fish and Wildlife. 2. Between May 1 and August 30 of the same year within 304 feet of any significant shorebird and wading bird nesting areas identified in adopted plans or policies or by the Oregon Department of Fish and Wildlife. For purposes of this subsection, heavy machinery is defined as motorized or mechanized machinery or equipment capable of deliberately or inadvertently damaging vegetation, compacting soil, moving earth or causing excessive noise or heavy vibrations through its use. (b) Stockpiles or storage of wood or building materials or machinery are prohibited within wetland boundaries, areas with the /WB and /WP overlay zones. (c) Petroleum products, chemicals, sediment, eroded soil or other deleterious materials used in the construction process shall not be allowed to enter the Ordinance - 85