Central Weber Sewer Improvement District - Executive Summary |
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Certification Statement As the District Manager of Central Weber Sewer Improvement District, I, the undersigned, certify that the following document is CWSID's Risk Management Program (RMP) and describes our current operations and best efforts for preventing and planning for emergency releases of chlorine (CL2). This program also meets the requirements of EPA's 40 CFR part 68. ____________________________________ Lance Wood, PE, District Manager - CWSID Executive Summary This RMP program meets the requirements of the Environmental Protection Agency 40 CFR part 68, which applies to facilities with certain threshold quantities (TQ) of hazardous chemicals, including chlorine (TQ 2,500 lbs). CWSID uses CL2 to disinfect waste water. CWSID may have up to 70,000 lbs of CL2 on-site. It is CWSID's goal to provide a safe and cost effective way for treating wastewater generated by residents and businesses. Present treatment operations at CWSID require the use of chlorine. With respect for t he potential hazards involved with using CL2, CWSID has taken many steps to prevent accidental releases. Accident History CWSID has been using chlorine to disinfect waste water since it began operations in 1959. Since that time there has not been a release of a reportable quantity of chlorine. Accident Prevention System Design - The CL2 storage tanks and the delivery trailers that CL2 is offload from have excess flow valves that automatically close if the liquid CL2 flow exceeds 7,000 lbs per hour. The CL2 systems are housed in a concrete building. The chlorine building is equipped with climate control systems that maintain a year round temperature near 70 degrees F. All chlorination equipment and systems within the chlorine building can be operated on back-up power from generators in the event of a power failure. With the exception of being in the liquid phase in the storage tanks, the CL2 system is a gas phase system. The CL2 system has been engineered to tolerate phase transitio ns or reliquification. The majority of the CL2 delivery systems are kept under constant vacuum pressure and have self-actuating valves that shut of the flow in the event of a fault. The CL2 building is vented to a scrubber system that is designed to neutralize 70,000 lbs of CL2. System Operation - The CL2 system is highly automated and automatically dispenses and manages the flow of CL2. Only experienced operators who have had extensive training are permitted to operate the CL2 systems. System Inspection & Maintenance - The CL2 system components undergo mechanical integrity inspections on equipment and performance testing on safety controls. Inspections from outside contractors and safety advisors are conducted to ensure that operator training and district operating procedures are efficiently established. Routine upgrades, change-outs and rebuilding are conducted as recommended by equipment manufacturers. Emergency Response In the event of an emergency CL2 release, CWSID has a L eak Team made up of experienced operators who have been trained and are equipped to control and stop leaks. The CL2 Leak Team coordinates emergency response drills and activities with the local fire department. |