Admin Order 58-09-07-F - Laserfiche WebLink

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conditions without mitigation; and (3) post -proposal conditions after mitigation, if any. On a scale of 1 to 5, with 5 the highest and 1 the lowest score, water quality function is measured by the total score from the following three categories: 2.3.1. Water Quality Management Area. This category requires the preparer to rate the overall water quality function of the subject lot based on the open physical area within the Water Quality Management area shown on the City's Water Quality Waterways Map, taking into account any areas that are excluded from the Water Quality Management Area pursuant to EC 9.4778 and permitted uses pursuant to EC 9.4780(2). This category recognizes that a larger area dedicated to preserving water quality function is likely to lower risk to water quality. • 5 rating: 100% of the Water Quality Management Area is available for water quality function. • 4 rating: 90% - 99% of the Water Quality Management Area is available for water quality function. • 3 rating: 80% - 89% of the Water Quality Management Area is available for water quality function. • 2 rating: 60% to 79% of the Water Quality Management Area is available for water quality function. • 1 rating: less than 60% of the Water Quality Management Area is available for water quality function. 2.3.2. Pollutant Filtration, Erosion Prevention, Channel Shading. This category requires the preparer to rate the overall water quality function of the subject lot based on the extent and type of vegetation in the Water Quality Management Area shown on the City's Water Quality Waterway Map. This category recognizes that greater vegetative coverage comprised of multiple layers of trees, shrubs, and low-level vegetation (e.g. forbs, grasses, rushes and ferns) lowers risks to water quality by filtering pollutants, preventing erosion, and shading water for temperature control. • 5 rating: 90% - 100% of the Water Quality Management Area is covered by vegetation consisting of a balanced distribution of trees, shrubs, and low-level plantings that can be expected to form a multi -layered, closed canopy upon maturity. • 4 rating: 80% - 89% of the setback area is covered by vegetation consisting of a balanced distribution of trees, shrubs, and low-level plantings that can be expected to form a multi -layered, closed canopy upon maturity. • 3 rating: 70% - 79% of the setback area is covered by vegetation consisting of a balanced distribution of trees, Administrative Order - Page 9 of 12