Patoka Lake Regional Water and Sewer District - Executive Summary

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

Patoka Lake Regional Water and Sewer District is a municipally owned Water and Sewer and facility established in 1975,  The district includes jurisdiction of approximately 225 square miles and is governed by a seven member Board of Trustees.  Two Board Members are appointed from each of the the three participiating counties:  the seventh is appointed by the Governor. 
It is the policy to maintain an outstanding, extremely clean operation to prevent the suden release of any toxic into the air or the ground.  An outstanding and complete Emergency Action Plan has been developed and shared with the Local Area Planning Committee and local Fire Departments.  Superintendents are held to an extremely high standard and are accountable for their respective areas of operaion.  Each employee is empowered to resolve any issue immediaetly which could cause a release.  If they are not able to fix or repair, outside assisstance is called immediaetly. 
Stationary source is of chlorine in one tone conta 
iners used in the treatemnt of wastewater.  There are two locations on site in enclosed areas.  They consist of two cylinders being connected to feed the system.  After the last PHA in June, 1999, it was decided to suggest a management of change procedure to explore the possibility of only using one tank at a time thereby reducing the total in the process to less than the TQ of 2,500 pounds.  may be executed by fall of 1999. 
Worst case secenario is offloading a one ton cylinder and causing a crack or rupture.  Total release would be 2000 pounds of Chlorine.  RMP Comp was used with a release time of 10 minutes at a  rate of 110 pounds per minute.  Wind speed 1.5 m/sec.  Toxic endpoint is 0.9 miles.  The primary receptor would be  Lick Creek recreation area on the Patoka Lake.  A state recreation area over two miles distance.  The forested area between facility and the marina is mature dense hardwood.  The vapor would disperse before reaching this point. 
Alternative release secenario i 
s a leak in the hose (line) system.  This would be identified by alarm system and the process shut down without delay.  Employees are trained to respond and repair the leak or call outside repair service if it is outside of their abilities.  RMP Comp was used to determine endpoint of 0.10 miles, effectively staying on the facility property.  Maximun release of 535 pounds in an enclosed area with drains for a period of 5 minutes. 
ARP is based on Process Safety Management for chlorine.  Daily and weekly inspections of equipment with immediate repairs of found problems.  Each employee is trained and must demonstrate both a cognitive and hands-on understanding of the chlorine process before allowed to operate as an individual.  Chlorine training occurs each year with a review of the Emergency Action Plan.  There are local alarms and indicators to a faulty system which are monitored 24 hours a day.  Management is keenly aware of the need to monitor the system and demands compliance from al 
l employees in this matter. 
There has been no releases in the past five years 
Patoka Lake Regional Water and Sewer District has an Emergency Response Plan which has been reviewed with all local Fire Departments and the Dubois County LEPC.  The last visit by the Fire Department was in JUly of 1995.  Additionally, one is planned for the summer of 1999 in the month of July. 
The only possible planned change to the ARP at this time is to not use two chlorine tanks in line.  By limiting to just one tank it will decrease the exposure and possibility of a larger release should emergency shut-off fail. 
The implemented Prevention Programs are as follows: 
    Emergency Action Plan 
    Process Safety Management which includes: 
    Process Hazard Analysis 
             Management of Change 
             Pre-start up review 
             Contractor safety       
    Operating procedures 
    Incident/accident Investigation 
    Compliance auditing 
    Employee participation 
  Hot work permit program
Click to return to beginning