3_Exhibits A & C-G - Laserfiche WebLink

Bringhurst LLC at 990 Sycamore Road Initial Study and Negative Declaration DISCUSSION a,e,f) Compliance with the Alameda Countywide Clean Water Program (ACCWP) National Pollutant Discharge Elimination System (NPDES) Permit, including C.3 provisions and implementation of a Construction Stormwater Prevention Pollution Plan, would regulate discharges to the municipal stormwater system and reduce potential water quality impacts. The project would be required to incorporate best management practices (BMPs) for discharges resulting from the project through the building permit and construction process. As a standard condition of approval, the project would prepare and implement a Stormwater Pollution Prevention Plan (SWPPP) during construction. These measures would include but not be limited to: erosion control measures to prevent soil, dirt, and debris from entering the storm drain system and canals; grading controls (e.g., timing, hydroseeding); traffic controls to prevent erosion from construction equipment; filters (e.g., wattles) on inlets; covered storage areas; and measures to control pollutants at wash out areas. These and similar measures in the SWPPP would filter contaminants from the stormwater before entering local arroyos and, ultimately, San Francisco Bay. The project will be required, per City standards, to collect and convey all stormwater entering and/or originating from the development to the City's storm drain systems. The geotechnical report also recommends that surface runoff be designed to drain away from building foundations and flatwork, speed up infiltration, and reduce the potential for expansive soils. Each lot, as part of the design review process, would be required to have its own bioretention area to treat. manage, and slow down runoff before it enters the storm drain system. The size of the bioretention area would be required to meet the applicable requirements at the time when the new home is proposed. Therefore, these potential impacts would be less than significant. b) The project would not use groundwater to provide water for this project. The bioretention and other landscaped portions of the project site (i.e., private yards) would allow for the groundwater aquifer to be recharged after implementation of the project. Therefore, this would be categorized as a less-than-significant impact. c) Sycamore Creek runs through the southern portion of the site. In order to determine whether the proposed project would affect the water flow in Sycamore Creek, hydrology studies were prepared by LandTech, Inc7. The studies found that the proposed development would result in slight increase in surface water flow into Sycamore Creek, but the increase is not considered to be significant and would not result in substantial erosion or siltation on- or 31 event landslides, lateral spreading, subsidence, liquefaction and collapse on the project site. The State of California provides 24 ical significance specifically designated by official action; 5.A stand of trees, the nature of which makes each dependent upon the other for survival or the area's natural beauty. 20 ive by having the additional two parcels. Excerpt Planning Commission Minutes, July 11, 2018 Page 9 of 11 , 2018 Page 3 of 11 Way, existing lots range from 15,033 sq. ft. (5769 Hanifen Way)to 20,313 sq. ft. (1008 Sycamore Creek Way). P18-0075, 990 Sycamore Road Planning Commission 11of16 'Y a 0421 0 0 �I ,�� r •u"' - 36. ,`a yy�� n2+a /'�. oM 'le' k� W, k 3S 94 '@ g 'via R T3 1:5,300 0 0.05 0.1 mi PUD-89-06-08M, Gabriela Marks, 4210 Rosewood Drive Planning Division _ January 7 2020 `( �� ""�� 0 330 660 Feet I Y I , I I