RIVERSIDE WATER TREATMENT PLANT - 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:
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
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.