| Accident History | Chemicals | Emergency Response | Registration | Source | Executive Summary |

                      EXECUTIVE SUMMARY 
The Riverside Water Treatment Facility maintains a Risk Management Plan for safe 
chlorine handling that involves an approach that integrates technologies, procedures and 
management practices to monitor potential hazards and minimize the risk of accidental 
release.  All applicable procedures of 40 CFR 68.170 are addressed in the plan, which seeks 
to provide for employee safety, public health and response agency interaction. 
The Riverside Water treatment Facility disinfects water pumped from the Ocmulgee River.  
Chlorination processes include (liquid) chlorination cylinders, chlorination equipment, and 
instrument room, electrical equipment, and process specific safety equipment.  
The chlorination process accidental release modeling was performed for the respective area 
to determine potential consequences associated with operating failures resulting in 
accidental chlorine release.  The first "worst case" scenario, defined by EPA, states that 
he owner or operator shall assume that the. . . maximum quantity in the largest vessel...is 
released as a gas over 10 minutes."  The "alternative scenario" is "more likely to occur than 
the worst-case release scenario."  The Riverside Water Treatment Facility has no incident 
In each case, atmospheric dispersion modeling was performed to determine the distance 
traveled by the chlorine released before its concentration decrease to a theoretical "toxic 
endpoint."  This is defined by the American Industrial Hygiene Association as "the 
maximum airborne concentration below which it is believed that nearly all individuals 
could be exposed for up to one hour without experiencing or developing life-threatening 
health effects."  The residential population within a perimeter corresponding to the toxic 
endpoint distance was defined to estimate the population potentially affected. 
The worst case release scenario for the Riverside Water Treatment Facility involves a 
failure of a one-ton c 
ylinder yielding a cumulative release of 2,000 lbs of chlorine.  When 
atmospheric dispersion modeling for this unlikely scenario was performed using the RMP* 
Comp ver. 1.06 a distance to toxic .9 miles urban was obtained.  
The alternative release (more likely) scenario for all chlorination processes involves tubing 
failure, bad connection, or valve failure resulting in the release of 317 lbs of chlorine.  
When atmospheric dispersion modeling for this scenario was performed using the RMP* 
comp Ver. 1.06 a distance to toxic endpoint of .1 miles urban was obtained. 
The Riverside Water Treatment Facility Risk Management Program includes the following 
key elements to mitigate the effects of potential chlorine release hazards: 
           Operator Training 
           Preventive Maintenance Program 
           Process specific safety equipment 
           Safe and effective standard operating procedures, written with operator                    
   Hazard review of equipment and procedures and 
           Auditing and inspection programs 
           Comprehensive Management Program 
The Riverside Water Treatment Facility has an active environmental, health and safety 
program with the following elements specifically supporting the safe handling of chlorine.   
           Respirator protection (SCBA) program 
           Chlorine detectors 
           Chemical right to know program and 
           Personal protective equipment program 
The Riverside Water Treatment Facility has an emergency response plan, which has been 
coordinated with the City of Macon and Bibb County Fire Department which is a member 
of the Local Emergency Planning Committee (LEPC).  Emergency response drills, drill 
evaluations, and facility tours will be conducted annually, at which time emergency 
operation and response procedures are also reviewed. 
The Riverside Water Treatment Facility takes a pro-active approach to risk management 
and emergency response 
through continuous joint training sessions between plant 
employees and local response agencies.  These preventive measures will provide for the 
continuous improvement of communications and will maintain effective procedures for the 
safe handling of and timely emergency response to potential chlorine.
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