RES 99074 - Laserfiche WebLink

Mitigation Measure 4.4-4: Wetland and Other Jurisdictional Waters of the United States. All grading plans shall include a minimum 100-foot setback from intermittent drainages and other seasonal wetlands that are not identified for development in the Specific Plan. The wetlands identified for development in the Specific Plan include the northern portion of the western-most drainage from approximately 300 feet south of the existing alignment of Vineyard Avenue to Arroyo del Valle to accommodate road crossings and residential development on Lots 18 and 22. the northern portion of the central drainage from the existing alignment of Vineyard Avenue to Arroyo del Valle to accommodate the proposed school on Lots 18 and 19, a 300-foot section of the eastern drainage south of the existing alignment of Vineyard Avenue to accommodate residential development on Lot 27, a 60-foot section of the eastern drainage near the Plan Area' s northern boundary to accommodate the realigned Vineyard Avenue crossing, and the majority of the eastern-most drainage that ends in a seep south of the existing alignment of Vineyard Avenue on Lot 28 to accommodate residential development. Measures to minimize erosion and rimoff into seasonal drainages shall also be included in all grading plans. Appropriate runoff controls such as berms, storm gates, detention basins, overflow collection areas, filtration systems, and sediment traps shall be implemented to control siltation and the potential discharge ofpollutants into preserved drainages. Prior to issuance of grading permits for Lots 18, 19, 21, 22, 24, 26, 27, 28, 32, and 33, a qualified biologist shall determine, through the formal Section 404 wetlands delineation process, the extent of jurisdictional wetlands on each lot. Authorization of a Section 404 permit shall be secured from USACE and a Section 1603 agreement shall be secured from CDFG, if applicable. As part of the permitting process, mitigation of impacts to jurisdictional wetlands shall be identified and implemented. The acreage shall be replaced or rehabilitated on a "no-net-loss" basis in accordance with USACE regulations. Habitat restoration, rehabilitation, and/or replacement shall be at a location and by methods agreeable to USACE. SIGNIFICANT EFFECT Impact 4.4-5: California Red-legged Frog. Implementation of the proposed project could result in loss of suitable California red-legged frog habitat. This impact would be considered potentially significant. Changes or alterations have been required in, or incorporated into, the project which mitigate or avoid the significant effects on the environment. Facts in Support of Finding The City of Pleasanton has adopted the following measures which will reduce potential biological resource impacts to a less-than-significant level: Mitigation Measure 4.4-5: California Red-legged Frog. All grading plans will include a minimum 100-foot setback from seasonal ponds that are not identified for development in the Specific Plan. (Mitigation Measure 4.4-4 identifies all wetlands that would be disturbed with site development and Exhibit 4.4-1 identifies the seasonal ponds on the project site.) Construction activity occurring within 100 feet of an intermittent drainage, may occur only if the drainage is completely dry. Vineyard Avenue Corridor Specific Plan Draft EIR -16- Findings