MO 2014-008 - Laserfiche WebLink

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• Potentially Significant Potentially Unless Less than Significant Mitigation Significant • Impact incorporated Impact No Impact Comments: c-f: The site is currently flat and covered by vegetation consisting mostly of grasses. Light rainfall is absorbed by the ground and heavy or sustained rainfall flows over the surface to the adjacent street where it enters an existing storm drain system with an ultimate discharge into the San Francisco Bay. The proposed project includes impervious surfaces that will increase the rate and amount of runoff from the site. Mitigation Measure#13 will ensure that the project will not exceed the capacity of the storm drain system or result In flooding. Mitigation Measure#14 will ensure that run off from the site is not a substantial source of pollution or silt. Mitigation Measure #13: Applicant shall be required to demonstrate adequacy of the existing storm drain system to handle existing run=off from the drainage basin as well as run-off from the project, upgrade the storm drain system to handle existing run-off from the drainage basin as well as run-off from the project, or meter run-off from the site so that It leaves the site at the same rate as It currently does. Mitigation Measure#14: Applicant shall remove pollutants from storm water prior to discharging the water from the site per the current NPDES permit. • Implementation of Mitigation Measure#13 and 14 will reduce potential impacts to a less than significant level. g-i: The property is not identified as being located within a Federal Emergency management Agency (FEMA) 100-year floodplain. Therefore,there would be no impacts of or to the 100-year floodplain. j-k: Tsunamis are large sea waves generated by submarine earthquakes or similar large-scale,. short-duration phenomena, such as volcanic eruptions, that can cause considerable damage to low-lying coastal areas. Because the project is located approximately 47 feet above mean sea level, not along an exterior coast, and over one mile inland from San Francisco East Bay, it would not be subject to tsunami inundation. Therefore, no impact would result, and no further analysis is required. Seiches are waves caused by large-scale, short-duration oscillation of confined bodies of water(such as reservoirs and lakes) during earthquakes that may damage low-lying adjacent areas, although not as severely as a tsunami. The closest enclosed body of water that could result in earthquake-induced seiche is Lake Chabot, over 2.5 miles upstream of the project site. Furthermore, there have never been any documented impacts from seiches at Lake Chabot.Therefore,the project site is not subject to seiche risk. There would be no impact, and no further analysis is required. X. LAND USE PLANNING. Would the project: • • • a. Physically divide an established community? X • b. Conflict with any applicable land use plan,policy,or regulation of an agency with jurisdiction over the project(including, but not limited to the X general plan,specific plan,local coastal program,or zoning ordinances) adopted for the purpose of avoiding or mitigating an•environmental effect? c. Conflict with any applicable habitat conservation plan or natural community X conservation plan? • 19 • •