Brazosport Water Authority - Executive Summary |
|
Brazosport Water Authority Executive Summary a) Brazosport Water Authority release prevention policies are as follows; 1. Utilize written job procedures involving handling of chlorine 2. All BWA personnel annually review written procedures 3. All operations and maintenance personnel are trained ( in-house and TEEX classes) in handling chlorine 4. All maintenance and operations personnel obtain a C surface water license within two and a half years of hire date. Emergency Response policies are as follows; 1. Notify Lake Jackson Fire Dept. 2. Do not attempt a repair of a leak or rescue without self contained breathing air apparatus 3. Evacuate all non essentual personnel 4. Do not attempt a repair alone 5. All BWA pesonnel are required to be HAZWOPER trained. b) Brazosport Water Authority maintains liquid chlorine in one ton cylinder on site for disinfection of drinking water. Chlorine maximum amount 36,000 lbs. c) Worst Case release secnario for: 1. Chemcial: Chlorine 2. Ph ysical state: Liquid 3. Basis for results: toxic end point fo 0.087 mg/L (RMP* Comp) 4. Scenario: Liquid spill and vaporization 5. Quanity: 2,000 pounds 6. Release rate: 200 pounds per minute 7. Release duration: 10 minutes 8. Wind speed; 3.4 miles per hour 9. Topography: Urban surroundings 10. Distance to endpoint; 5.4 miles 11. Public and environmental receptors; 40, 750 residents, 10 schools, 1 hospital, 2 prison farms, 11 parks, 4 nursing homes, a girl scout meeting area adn 2 commerical and office areas. See Drawing I for graphic illustration of release Alternative release scenario analysis 1. Chemcial; Chlorine 2. Physical state; gaseous 3. Basis of results; toxic endpoint 0.087 mg/L (RMP* Comp) 4. Scenario: toxic gas release through a 0.11 square inch hole or puncture 5. Quanity; 1410 pounds 6. Release rate; 23.5 pounds per minute 7. Release duration; 60 minutes 8. Wind speed and atmospheric stability class; 6 ,7 miles per hour and Class D 9. Topography; Urban surroundings 10. Distance to endpoint; 0.58 miles 11. Public and environmental receptors; commerical area, girl scout meeting area and Brazos River Bottom Wetlands. See Drawing II for graphic illustration of release d) The general accidental release prevention program 1. All repetive jobs require a written job procedure 2. All operators are trained in release prevention 3. Require all operators to be HAZWOPER trained 4. Review all chemcial carriers for safety and release prevention program Accidental release prevention for chlorine 1. All operators are trained in chlorine release prevention 2. Only AWWA approved chlorine equipment and materials are utilized 3. All chlorine handling jobs require written approved job procedures and annual review 4. All chlorine carriers are reviewed for accidental release prevention and safety training programs 5. Daily inspection for chlorine system 6. Daily testing of chlornator leak detection system 7. Rebuild and/or inspect all chlorinators and chlorine dioxide generators semi annually e) Five year accident history There have been no reportable accidental releases of chlorine from the Brazosport Water Authority Plant in the last five years f) Planned changes of to improve safety 1. Monthy safety topic via self paced written module and subject matter written test 2. Posting of investigations findings of incidents concerning safety issues in water plants 3. Request all operators to take TEEX Safety Class within three years of hire date |