BWWP Whitlock Water Treatment Plant - Executive Summary |
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BWWP WHITLOCK WATER TREATMENT PLANT Executive Summary Release Prevention and Emergency Response Policies The Board of Water Works of Pueblo, Colorado City of Loveland, Colorado (BWWP) takes an active approach in maintaining and improving chemical safety. The BWWP has emphasized its commitment to safety by holding monthly shift meetings emphasizing safety, and have been rewarded in this approach by having no accidental releases of chlorine or anhydrous ammonia within the last five years. Facility and Regulated Substance The Whitlock WTP is located at 1920 West 11th Street, on the west side of Pueblo near the Arkansas River. Chlorine and anhydrous ammonia are used at the WTP to provide disinfection of the public water supply. The primary and filter plant chlorination processes store chlorine in one-ton cylinders, and no more than 30 cylinders of chlorine (60,000 pounds) are stored at the WTP, 26 cylinders (52,000 pounds) in the primary chlorination process and 4 cylinders (8,000 po unds) in the filter plant chlorination process. Anhydrous ammonia is stored within four 2,000 gallon storage tanks for a maximum storage capacity of 8,000 gallons (35,200 gallons). Worst Case and Alternative Case Release Scenarios The worst case release scenario for both the primary and filter plant chlorination processes involves the loss of 2,000 pounds of chlorine from a single cylinder of chlorine outside of any enclosure. The rule for worst case release analysis assumes all of the contents are released in 10 minutes. The alternative case release scenario for both the primary and filter plant chlorination processes was based on accident history at the site, process hazard analysis, and experience at similar facilities, and involves the release of 1,550 pounds of chlorine in 10 minutes as a result of a crack in the cylinder caused by a drop from a forklift. The distance to endpoint for both scenarios were analyzed using RMP*Comp, and the analyses resulted in a worst case release scenario distance to endpoint of 1.3 miles and an alternative case release scenario distance to endpoint of 0.2 miles. The worst case release scenario for the anhydrous ammonia process involves the loss of 8,800 pounds of chlorine from a single anhydrous ammonia storage tank in 10 minutes. The alternative case release scenario for the anhydrous ammonia process was based on accident history at the site, process hazard analysis, and experience at similar facilities, and involves the release of 4,350 pounds of chlorine in 30 minutes as a result of a pump seal failure on the tanker truck during filling operations. The distance to endpoint for both scenarios were analyzed using RMP*Comp, and the analyses resulted in a worst case release scenario distance to endpoint of 1.2 miles and an alternative case release scenario distance to endpoint of 0.1 miles. Accidental Release Prevention Program The accidental release prevention program complies with the requirements for Program Level 2 proc esses. The prevention program includes an employee training program based on the written operating procedures for the WTP, as well as a maintenance, inspection, and testing program for equipment utilized within the covered processes. These programs all serve to prevent or minimize unintended releases of chlorine and anhydrous ammonia. Five-Year Accident History The WTP has not had an accidental release of chlorine or anhydrous ammonia within the last five years. Emergency Response Program The WTP is included within a written community emergency response plan, and the primary responder to the WTP is the City of Pueblo Fire Department. WTP employees handle incidental releases of chlorine and anhydrous ammonia and are trained and equipped to do so. |