N. Canadian Wastewater Facility - Executive Summary |
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We have adopted this Program in order to implement 40 C.F.R. 68, the federal requirements regulating Risk Management of Highly Hazardous Chemicals. This Program will help prevent the occurrence of, or minimize the consequences of, catastrophic releases by stating our policies and procedures for the management process hazards in start-up, operation, inspection, maintenance, and the other matters addressed in the federal standard. The PSG Program calls for the maximum employee participation and includes all the elements of the employee participation provisions of the standard. At a minimum, PSG employees will: (1) participate in the development of the site specific PSM and RMP programs and will participate in their implementation, (2) participate in conducting the chlorine process hazard analysis, (3) be trained annually on the PSM and RMP programs and any changes made to the program systems or processes, (4) will work with management to develop additional programs or procedures relat ive to chlorine process safety as needed, and (5) participate in the periodic audits of the chlorine process and the Chlorine PSM Program. Accidental Release Prevention and Emergency Response Policies PSG believes that preventative maintenance is the key to minimizing the potential for accidental releases. Standard Operating Procedures (SOPs) have been reviewed and revised to enable the employees to perform their work in a safe and efficient manner. The North Canadian Wastewater Facility has chosen to be a non-responding facility in the event of an emergency. Responsibility for emergency response to an accidental release has been given to the Oklahoma City Police and Fire Departments and the State and Local Emergency Response Centers. Stationary Sources and Regulated Substances. The North Canadian Wastewater Facility utilizes chlorine for disinfection and sulfur dioxide for dechlorination of the treated wastewater. The maximum inventory and threshold quantities for these chemi cals are shown below. Chemical Maximum Inventory (lb.) Threshold Quantity (lb.) Chlorine 16,000 2,500 Sulfur Dioxide 4,000 5,000 Offsite Consequence Analysis The offsite consequent analysis includes a worst-case scenario and an alternative release scenario for chlorine as defined in 40 C.F.R 68. RMP*COMP was used to determine endpoint distances for both scenarios. A dense gas model is required since chlorine is heavier than air. The models input parameters are summarized in the table below. RMP*COMP Input Parameters Worst-Case Scenario Alternative Scenario End Point Concentration (mg/l) 0.0087 0.0087 Windspeed (m/s) 1.5 3 Atmospheric Stability Class F D Temperature (0 F) 77 77 Humidity (%) 50 50 Height of Release (m) 0 10 Surface Roughness 1 1 The results of the air dispersion modeling are summarized in the table along with estimated population within the impact area. The population data was estimated using the Block Centroid Density Group Method in Landview for the worst-case scenario. The Block Uniform Density Group Method was used for the alternative scenario because Block Centroid information did not exist for the reduced area in the alternative scenario. RMP*COMP Output Results Worst-Case Scenario - Chlorine Alternative Scenario - Chlorine Impact Radius(miles) 1.3 0.2 Estimated Population within Impact Area 1,020 10 Environmental Rceptors within Impact Area None None Process Safety Management Program PSG has compiled a Process Safety Management Program to minimize releases. This Program includes; safety information on the covered chemicals, hazard reviews, operating and maintenance schedules, training, compliance audits, incident investigations, and emergency response procedures. Five-year Accident History In the last 5 years, there have not been any accidental releases from the covered processes that resulted in deaths, injuries, evacuations, sheltering-in-place, property damage, or environmental damage. |