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► create hazardous emissions or require handling of hazardous or acutely hazardous materials, substances, or <br /> waste within one-quarter mile of an existing or proposed school; or <br /> ► impair implementation of, or physically interfere with, an adopted emergency response plan or emergency <br /> evacuation plan. <br /> IMPACT ANALYSIS <br /> IMPACT Hazards and Hazardous Materials—Creation of a Significant Hazard to the Public or the Environment. <br /> 4.6-1 Existing safety practices and health and safety programs currently in effect would continue to be <br /> implemented with expansion of the Manteca WQCF and construction of new pipelines for the wastewater <br /> collection system and recycled-water distribution. In addition, use of hazardous materials during project <br /> construction and operation would be in compliance with federal, state, and local regulations. Because <br /> adequate safety procedures and precautions are in place and would continue with implementation of the <br /> Manteca WQCF and Collection System Master Plan Updates, and the project would implement and comply <br /> with existing hazardous materials regulations, the potential for accidental releases of hazardous materials or <br /> other significant hazards to the public or the environment would be less than significant. <br /> Hazardous materials are transported, handled, and used daily at the Manteca WQCF. Use of some of these <br /> hazardous materials would increase as plant capacity increases. However,use of acutely hazardous materials <br /> under the Manteca WQCF and Collection System Master Plan Updates would be significantly reduced with <br /> conversion from chlorine disinfection to an ultraviolet light(UV) disinfection process. Chlorine would still be <br /> used in the event of a process upset in the secondary treatment facility or for algae control. Chlorine would also be <br /> used to maintain a residual in the recycled water distribution system. Sulfur dioxide would be used only in the <br /> event that a chlorine residual is measured in the treated effluent. <br /> The chemicals stored and handled in greatest quantity at the WQCF following expansion would be used for fuel, <br /> plant maintenance, and wastewater treatment applications (acetylene, diesel fuel, methane gas, oil, oxygen, <br /> sodium hydroxide, and polymers [nonhazardous]). Data on current and projected future use of chemicals are <br /> presented in Table 4.6-3. Of the chemicals used in bulk, only chlorine and sulfur dioxide are considered acutely <br /> hazardous materials. <br /> Table 4.6-3 <br /> Current and Projected Future Average Monthly Hazardous Materials Use at the Manteca WQCF <br /> Hazardous Material Current Conditions I Future Conditions <br /> Chlorine 23,500 lbs 1,200 lb <br /> Sulfur dioxide 20,600 lbs 1,050 lb <br /> Sodium hydroxide 16,500 gallons 45,000 gallons <br /> Acetylene Gas 50 cu.ft. 50 cu.ft. <br /> Oxygen 100 cu. ft. 100 cu. ft. <br /> Methane Gas z 170,000 cu. ft. 460,000 cu. ft. <br /> Oil 2,750 gallons 2,750 gallons <br /> Averages based on May—October 2006 Monthly Operations Data Summary. <br /> 2 Daily average usage. <br /> Sources:Shannon,pers.comm.,2006d; Richard, pers.comm.,2006 <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 4.6-11 Hazards and Hazardous Materials <br />