CORRESPONDENCE_2006-2007 - Laserfiche WebLink

Home Browse Search

San Joaquin County Environmental Checklist b. The proposed project would not substantially deplete groundwater supplies or interfere substantially with groundwater recharge,resulting in a net deficit in aquifer volume or a lowering of the local groundwater level because no operational changes are proposed as part of the project that would result in a substantial increase in the use of groundwater at the landfill facility. Therefore, this impact is considered to be less than significant. No mitigation is required. c,d. Every year,the landfill operators repair and regrade(if needed)the drainage system to ensure that infiltration is minimized and runoff is directed to the onsite retention pond. The County would revise the Closure Plan to address the final approved height increase. Increasing the height of the landfill would not affect the total storm water to be handled on site,but the increased slopes could increase the instantaneous flow rate that the drainage facilities must convey. The revised Closure Plan will include evaluation of the drainage facilities under the new conditions,and design of drainage facilities for closure at the increased height. Therefore,the project would not result in substantial erosion or siltation on or off site,nor would the project substantially increase the rate or amount of surface runoff in a manner that would result in flooding on or off site. No mitigation is required beyond the possible redesign of drainage facilities identified in the Closure Plan. g,h,i. According to FEMA's Flood Insurance Rate Maps,the proposed project is located in Zone C,defined as an area of minimal flooding, and is not located within a 100-year floodplain(Flood Insurance Rate Maps 2004). Further,the proposed project does not include the construction of any new structures at the landfill property and therefore would not result in the potential to impede or redirect flood flows up to and including a 100-year flood event. There are no levee or damns associated with the landfill property. Accordingly,there is a less-than-significant impact regarding flooding. No mitigation is required. j. The project site is unlikely to be subjected to inundation by a seiche,tsunami,or mudflow. The site is relatively distant from the Pacific Ocean and other large water bodies and has not been historically affected by tsunamis or seiches. The risk of these events is considered low. The project site is not located adjacent to steep slopes or high-gradient drainages that experience variable discharge. As a result,the risk of mudflow is also considered low. Impacts are considered less than significant.No mitigation is required. Notice of Preparation for the June 2006 North County Recycling Center and Sanitary Landfill 2-55 Permit Revision J&S 06307.06