3_Exhibits A & C-G - Laserfiche WebLink

Bringhurst LLC at 990 Sycamore Road Initial Study and Negative Declaration off-site. The hydrology studies were peer reviewed by Engeo, Inc8. Engeo agreed with the analysis and conclusions in the hydrology studies. Therefore, this would be categorized as less than significant. d) Although the project would not substantially alter the existing drainage pattern, it would increase the amount of impervious area on the site. This increase would be mitigated through the required installation of a stormwater bioretention area on each lot that would manage, slow down, and treat runoff before it enters the storm drain system. As a result, the project would not substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site. Therefore, the potential impact would be less than significant. g,i) The Federal Emergency Management Agency (FEMA) National Flood Hazard Layer FIRMette map indicates the project site is not located in a 100-year flood zone. Therefore, this would be categorized as no impact. j) The City of Pleasanton is not at risk from seiche, tsunami, or mudflow. Therefore, this would be categorized as no impact. 5.10. LAND USE PLANNING ENVIRONMENTAL SETTING The project site is currently occupied by an existing single-family residence. Access to and from the project is directly from Sycamore Road. STANDARDS OF SIGNIFICANCE For purposes of this environmental document, an impact is considered significant if the proposed project would: • Substantially alter an approved land use plan that would result in physical change to the environment. 32 e 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