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...' - I -, r"') f -y- ,h (-, " 'i.>.j{--;'L " L COMPREHENSIVE EMERGENCY MANAGEMENT PLAN In addition to the hazards of stored chemicals, there are hazards of transporting chemicals into and through the area. Most hazardous materials are regularly carried on railroads and the freeways and major roads designated as explosive routes by CAL TRANS and the Highway Patrol. The proximity of some of these routes to large numbers of people suggests that an accident involving hazardous materials transportation could reach disaster proportions. The extreme toxicity of some chemicals used in the area and the specialized handling and cleanup procedures required during an accident can close major thoroughfares and necessitate evacuation. The Union Pacific/Southem Pacific Railroads conduct rail operations in the Pleasanton area. Cargoes of electronics, fabricated metals, plastics, precision machinery, agricultural chemicals, construction materials, rock/sand/gravel aggregates and other hazardous materials are also shipped over the rail lines. A spill of bulk hazardous materials could result in fire, explosion, toxic cloud or direct contamination of people and property. The effects may involve a local s~e or many square miles. Health problems may be immediate, such as corrosive effects on skin and lungs, or may be eventual, such as the development of cancer from a carcinogen. Damage to property could range from immediate destruction by explosion to permanent contamination by a persistent hazardous substance. The 1-580 corridor affords a large amount of truck movement from the Bay Area to the Central Valley. At its eastern end, it connects to Interstate 5, the major north-south route through California, and at its west end, Interstate 80, the major east-west route through Northern California. The weigh station operated by the California Highway Patrol at Vasco Road reports that, on a month-by-month basis, an average of 25,000 trucks pass through that facility. Approximately 8% of those trucks, or 2,000 trucks per month, display hazardous materials placards. Assuming each vehicle had an average load weight of 35,000 pounds... that would convert to approximately 35,000 tons of placarded material a month moving through the 1-580 corridor. Because of its proximity to large U. S. Department of Energy facilities, the Livermore/Pleasanton area has a unique risk to public safety by the transportation of quantities of various radioactive materials. In case of an accident, small amounts of radioactive materials can be dislodged from their protective containers and become extremely difficult to locate necessitating evacuation of large areas. The Livermore-Pleasanton Fire Department Hazardous Materials Area Plan contains additional specific details regarding Hazardous Materials Incident potential. Additional Local Flood Infonnation The following details on flooding from Pleasanton's All Hazard Vulnerability Assessment and the Safety Element from Pleasanton's General Plan were not mentioned in the ABAG plan. Historically, the Amador Valley has experienced relatively frequent and substantial flooding because many streams which drain large areas of impermeable soils converge in the area. During periods of intense rainfall, runoff rapidly causes stream flows to exceed floodway capacities and inundate adjacent areas of the flat valley floor. Extensive flood ANNEX G - Local Hazard Mitigation Annex Updated 12112J05 7