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4.6 HAZARDS AND HAZARDOUS MATERIALS <br /> This section evaluates the potential hazardous material and public health impacts from implementation of the <br /> proposed Manteca Wastewater Quality Control Facility(WQCF) and Collection System Master Plans Update <br /> Project. The analysis presented in this section is based on a review of project plans, available government reports <br /> and documents, and applicable elements from the City of Manteca General Plan 2023 (City general plan). The <br /> project area is not located within an airport land use plan or within 2 miles of a public or private airport. <br /> Therefore,this issue is not evaluated further in this DEIR. <br /> 4.6.1 ENVIRONMENTAL SETTING <br /> EXISTING USE OF HAZARDOUS MATERIALS <br /> Several potentially hazardous materials are currently used at the Manteca WQCF. Some of these materials, such <br /> as chlorine and sulfur dioxide, are delivered in 1-ton containers. Other materials, such as acetylene and oxygen, <br /> are less hazardous or are used in much smaller quantities (200-cubic-foot pressurized cylinders). Potentially <br /> hazardous materials currently used at the WQCF are described in Table 4.6-1. The location of the existing <br /> chemical handling area,where chlorine and sulfur dioxide are offloaded and stored, is shown in Exhibit 3-4.A <br /> description of chlorine and sulfur dioxide is provided below. <br /> Table 4.6-1 <br /> Description of Hazardous Materials Used at the Manteca WQCF <br /> Acetylene Acetylene is received in movable pressurized cylinders,and is stored in the maintenance <br /> (CAS No. 74-86-2) area.Acetylene is used in gas welding/cutting operations.No waste product remains. <br /> Chlorine Chlorine is received in 1-ton capacity steel containers that are located in a covered <br /> (CAS No. 7782-50-5) chemical storage room on load cell platforms and trunnion type storage racks.The <br /> chlorine is stored in a liquid state. The liquid is evaporated to gas and is transported by <br /> piping under vacuum to the application system where it is injected in the treated effluent <br /> to accomplish disinfection.No waste product remains. <br /> Diesel Fuel Diesel fuel is received by truck and stored in aboveground steel storage tanks with <br /> (CAS No. 68476-34-6) secondary containment.Diesel is used as a fuel for vehicles and portable equipment and <br /> is consumed in use. <br /> Lubricating Oils Lubricating oils are received in steel drums and used throughout the facility in vehicles <br /> (CAS No. 64742-54-7) and mechanical equipment.Used lubricating oils are recycled. <br /> Methane Gas Methane gas is produced in the anaerobic digester.Methane gas can be used as a fuel <br /> (CAS No. 74-82-8) source for steam boilers,or a cogeneration facility.Methane is consumed in use. <br /> Oxygen Oxygen is used from compressed gas cylinders for maintenance cutting and welding. <br /> (CAS No. 7782-44-7) <br /> Sodium Hydroxide 130% Sodium hydroxide is received by tank truck and is stored as a liquid in aboveground <br /> (CAS No. 1310-73-2) polyethylene tanks.The solution is used to control the pH of treated wastewater.The <br /> sodium hydroxide is dissolved into the final effluent flow and discharged.No waste <br /> product remains. <br /> Sulfur Dioxide Sulfur dioxide is received in 1-ton capacity steel containers that are located in a covered <br /> (CAS No. 7446-09-5) chemical storage room on load cell platforms and trunnion type storage racks. Sulfur <br /> dioxide is stored in a liquid state.The liquid is evaporated to a gas and is transported by <br /> piping under vacuum to the application system where it is injected into the treated <br /> effluent to accomplish dechlorination(elimination of residual chlorine).No waste <br /> product remains. <br /> Source:Shannon,pers.comm.,2006a <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 4.6-1 Hazards and Hazardous Materials <br />