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Attachment A <br />RWMWD Policy (for reference) <br />Land Disturbance. Any activity on property that results in a change or alteration in the existing ground <br />cover (both vegetative and non -vegetative) and/or the existing soil topography. Land disturbing <br />activities include, but are not limited to, development, redevelopment, demolition, construction, <br />reconstruction, clearing, grading, filling, stockpiling, excavation and borrow pits. Routine vegetation <br />management and road milling/overlay activities that do not alter the soil material beneath the road <br />base shall not be considered land disturbance. In addition, in-kind catch basin and pipe <br />repair/replacement done in conjunction with a mill/overlay project shall not be considered land <br />disturbance. <br />Existing Policy (for reference) <br />Projects conducting mill and overlay or other surface pavement treatments, where aggregate base is left <br />undisturbed, on existing impervious areas are exempt from the City's water quality treatment and rate <br />control requirements. However, requirements must be met if the project impacts the base and/or sub- <br />base materials for 21,780 square feet or more of disturbed area. <br />New - Option 1 (less restrictive) <br />Projects conducting mill and overlay or other surface pavement treatments on existing impervious areas <br />are exempt from the City's water quality treatment and rate control requirements. The City's <br />Stormwater Management Standards are required when 5,000 square -feet or more of soil material below <br />the base is impacted, or if drainage patterns are altered. Base is considered to be the layer directly <br />below the pavement, consisting of aggregate material, typically Class V aggregate or similar variations <br />such as recycled aggregate, reclaim material, etc. <br />New - Option 2 (more restrictive) <br />Projects conducting mill and overlay on existing impervious areas are exempt from the City's water <br />quality treatment and rate control requirements. The City's Stormwater Management Standards are <br />required when 5,000 square -feet or more of base material is disturbed, or if drainage patterns are <br />altered. Disturbance of the base includes, but not limited to, grading, shaping, filling, and removals. <br />Base is considered to be the layer directly below the pavement, consisting of aggregate material, <br />typically Class V aggregate or similar variations such as recycled aggregate, reclaim material, etc. <br />R:\Pu bl icWo rks\Pu bl ic_Works_Commission\Age nda ltemCoverSheets\2017\02_February\17_0225 6a—Stormwater <br />Management Standards Policy Options.doc <br />