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Hayward Fault, it will be essential to address the potential for ground failure, <br />ground shaking, liquefaction, and other geologic hazards. <br />The Planning Center I DC&E also will review available environmental databases to <br />describe known and potential subsurface contamination in the city and the <br />immediate vicinity, including leaking underground storage tanks. Development in <br />areas with known or potential contamination could pose a threat to human health <br />and/or the environment if the materials are not properly identified and managed. <br />Hazardous materials storage, handling, and transportation issues also will be <br />addressed. <br />The Planning Center I DC&E will discuss the extent of and likely risks associated <br />with hazardous building materials. We will identify any hazards to navigable <br />airspace associated with airports. Additionally, we will describe emergency <br />response and evacuation plans for the City and evaluate the risk of loss of life or <br />property damage associated with wildland fires and flooding. Federal, State, and <br />local plans, laws, and regulations will also be described. <br />4.9 Noise Data <br />The Planning Center I DC&E will review the existing Noise Element of the General <br />Plan, review aerial photography, and collect ambient noise level measurements to <br />document the existing noise conditions in the city. Ambient noise monitoring will <br />include a combination of short- and long-term noise measurements to be taken at <br />up to 16 locations in San Leandro. These locations, envisioned to consist of three <br />long-term (24-hour) and thirteen short-term (typically, 15 minutes) monitoring <br />sites, will be selected by the consultant in coordination with City staff to identify <br />and quantify the major roadway noise sources, including the I-580 and I-880 <br />freeways, primary City arterials, and aircraft over -flights from Oakland <br />International Airport. The focus will be on the key sites identified for housing <br />development opportunities. <br />A 2014 noise contour map will be prepared based upon the data collected during <br />the noise monitoring survey and traffic data provided by Kittelson. The existing <br />conditions summary will also discuss applicable thresholds for ground vibration. <br />4.10 Air Quality and Greenhouse Gases Data <br />The Planning Center I DC&E will describe current air quality within the San <br />Francisco Bay Area Air Basin (Air Basin) in the vicinity of San Leandro, existing <br />levels of criteria air pollutants available from the nearest air quality monitoring <br />station, and a summary of regulations adopted to reduce health -based impacts <br />