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CITY OF NATCHITOCHES WATER TREATMENT PLANT

Parent Companies:
CITY OF NATCHITOCHES
EPA Facility ID:
100000096521
Other ID:
Facility DUNS:
0
Parent Company DUNS:
0

Location:

Address:
100 RAPIDES DRIVE
NATCHITOCHES, LA 71457
County:
NATCHITOCHES
Lat / Long:
31.445, -93.082 (Get map)
Method:
GPS Code Measurements (Psuedo Range) Standard Positioning Service Corrected
Description:
Center of Facility
Horizonal accuracy:
1 m
Horizontal reference datum:
North American Datum of 1983
Source map scale:

Owner/Operator:

Name:
CITY OF NATCHITOCHES
Phone:
(318) 357-3888
Address:
100 RAPIDES DRIVE
NATCHITOCHES, LA 71457
Foreign Address:

Person responsible for RMP implementation:

Name:
CHARLES BROSSETTE
Title:
DIRECTOR OF UTILITIES

Emergency contact:

Name:
BRONNIE ODOM
Title:
WATER TREATMENT PLANT MANAGER
Phone:
(318) 357-3888
24-hour phone:
(318) 521-3539
Ext or PIN:

Other contacts:

Facility (or company) email:
Facility phone:
(318) 352-2772
Facility (or company) URL:

Safety:

Local Emergency Planning Committee:
Natchitoches LEPC
Full-Time Equivalent Employees:
6
Covered by OSHA PSM:
No
EPCRA section 302:
Yes
CAA Title Air Operating Permit:
No
CAA Permit ID#:
OSHA Star/Merit Ranking
No
Last Safety Inspection Date:
April 20, 2016
Inspecting Agency:
LADEQ
Using Predictive Filing:
No

Processes:

Unspecified process
RMP ID:
1000086515
CBI claimed:
No
Program Level:
2
NAICS:
Water Supply and Irrigation Systems (22131)
Chemical name
CAS#
Quantity (lbs.)
CBI
Chlorine
7782-50-5
24,000
No
Public OCA Chemical
0
No

RMP Preparer:

Name:
JOHN B. FRENCH
Address:
1111 HAWN AVENUE
SHREVEPORT, LA 71107
Foreign Address:

Phone:
(318) 221-7501

Latest RMP Submission:

Date:
April 17, 2018
Type:
Resubmission
Reason:
5-year update (40 CFR 68.190(b)(1))
Registered:
Yes
RMP ID:
1000069017

Deregistration:

Date:
Effective Date:
Reason:
Other Reason:

2. Toxics: Worst-case

Some Risk Management Plan information is not provided in the available RMP data. You need to make an appointment at an EPA Reading Room In order to get access to details from the Off-Site Consequence Analysis (OCA) such as:

Instructions on how to make an EPA appointment can be found here.

Public OCA Chemical (in Unspecified process)
CBI claimed:
No
Percent weight:
Physical state:
Gas liquified by pressure
Model used:
EPA's OCA Guidance Reference Tables or Equations
Release duration (mins):
10.00
Wind speed (meters per sec):
1.5
Stability class:
F
Topography:
Urban
Passive mitigation
considered:
  • Enclosures
not considered:
  • Dikes
  • Berms
  • Drains
  • Sumps

3. Toxics: Alternative release

Some Risk Management Plan information is not provided in the available RMP data. You need to make an appointment at an EPA Reading Room In order to get access to details from the Off-Site Consequence Analysis (OCA) such as:

Instructions on how to make an EPA appointment can be found here.

Public OCA Chemical (in Unspecified process)
CBI claimed:
No
Percent weight:
Physical state:
Gas liquified by pressure
Model used:
EPA's OCA Guidance Reference Tables or Equations
Wind speed (meters per sec):
3.00
Stability class:
D
Topography:
Urban
Passive mitigation
considered:
  • Enclosures
not considered:
  • Dikes
  • Berms
  • Drains
  • Sumps
Active mitigation
considered:
not considered:
  • Sprinkler systems
  • Deluge systems
  • Water curtain
  • Neutralization
  • Excess flow valve
  • Flares
  • Scrubbers
  • Emergency shutdown

4. Flammables: Worst-case

None

5. Flammables: Alternative release

None

6. Five-year accident history

No Registered Accidents

7. Prevention: Program level 3

No Prevention Program level 3

8. Prevention Program level 2

, Water Supply and Irrigation Systems (22131)
Prevention Program ID:
1000054270
Safety Review Date
July 20, 2017, since latest RMP submission
PHA Update Date
, since latest RMP submission
Safety Regulations
  • None
Hazards Identified
  • Toxic Release
  • Corrosion
  • Tornado
  • Hurricanes
Process Controls
  • None
Mitigation Systems
  • Enclosure
Monitoring Systems
  • Process Area
Changes since PHA
  • Increased Inventory
  • Mitigation Systems
Training Type
  • None
Competency Testing
  • Demonstration
  • Observation
Procedure Review Date
June 23, 2017, since latest RMP submission
Training Review Date
July 20, 2017, since latest RMP submission
Maintenance Review Date
June 23, 2017, since latest RMP submission
Maintenance Inspection Date
June 23, 2017, since latest RMP submission
Equipment Tested
Yes
Management of Change Most Recent Date
Management of Change Review Date
Pre-startup Review Date
Compliance Audit Date
July 20, 2017
Compliance Audit Change Completion Date
July 27, 2017
Incident Investigation Date
None
Incident Invest. Change Completion Date
None
Participation Plan Review Date
Hot Work Review Date
Contractor Safety Review Date
, since latest RMP submission
Contractor Safety Eval. Date
, since latest RMP submission

9. Emergency response

Facility In Community Plan:
Yes
Facility Own Response Plan:
No
Specific Facility Response Plan:
Yes
Inform. Procedures in Response Plan:
No
Emergency Care in Response Plan:
Yes
Plan Review Date:
Response Training Date:
Feb. 6, 2006
Local Response Agency:
Local Response Agency Phone:
(318) 357-7802
Subject To - OSHA EAP:
No
Subject To - OSHA HAZWOPER:
No
Subject To - CWA:
No
Subject To - RCRA:
No
Subject To - OPA:
No
Subject To - State EPCRA:
Yes
Subject To - Other:

Executive Summary

Executive Summary for the City of Natchitoches Water Treatment Plant



FACILITY ID NO. 110063714119



The City of Natchitoches Water Treatment Plant (WTP) is located at 100 Rapides Drive, Natchitoches, Natchitoches Parish, Louisiana. The WTP uses various chemicals to purify approximately 5 million gallons of water per day. Facilities, training, operations, and maintenance procedures are in place to store and use ton cylinders of chlorine for disinfection to eliminate harmful bacteria as well as viruses and other pathogens from the potable water. Chlorine is in a gaseous state at normal temperature and pressure, but at the water treatment plant it is in a liquid state stored under pressure in one ton cylinders.



The RMP manual has been updated as required to meet EPA guidelines. The City has completed a Vulnerability Assessment (VA) and updated the Emergency Response Plan (ERP) to address the findings of the VA. The updated ERP is on site and a copy will be provided to the parish emergency coordinator. The release scenarios have been revised using the RMP Comp program. MARPLOT was used to determine the release scenario impact areas and populations.





1. The accidental release prevention and emergency policies in place at our plant consist of various elements. The primary prevention mechanism is operator training which is accomplished through a) on the job training b) written testing and c) safety meetings and review of safety procedures. We have chosen the safest possible equipment for adding chlorine to the water. We use what is called remote vacuum. Using this method there is no danger of a chlorine leak beyond the chlorine cylinder itself. Should a release occur the first step is to call 911 and report the release. The local fire department which has personnel familiar with the location and quantity of chlorine stored at our facility, is then called. Depending upon the severity of the release the local police department
will be called if evacuation is necessary. It is the intention of the City of Natchitoches to have as safe a facility as possible and we have committed the funds and manpower necessary to accomplish this end.



2. The only regulated substance handled at the City of Natchitoches' Water Treatment Plant is chlorine. As stated above chlorine comes from the manufacturer in metal cylinders containing 2000 pounds of chlorine. These cylinders are stored on the south side of the plant behind plant #2 clarifiers. Each cylinder comes with a metal cover protecting two valves. These covers are not removed until the cylinder is ready to be utilized. A major safety factor is the use of remote vacuum system. With this system there is no chlorine under pressure beyond the vacuum regulator which is attached directly to the chlorine cylinder. Thus any line breakage or equipment failure beyond the cylinder will not result in a release of chlorine.



3. The worst case scenario would be a release of 18,000 pounds of chlorine in ten minutes. In such a scenario there would be off site impact. Using EPA's OCA Guidance Reference Tables or Equations, the endpoint distance would be a 4.4 mile radius with a population of 23,500 based on the 2010 Federal Census information. In the alternative release scenario a quantity of 421 pounds of chlorine would be released in a 10 minute time frame. Using EPA's Reference Guidance Tables or Equations, the endpoint distance would be a 0.10 mile radius with a population of 0 within this area. There would no off site impact.



4. All operators have been extensively trained in handling chlorine and the proper safety requirements to be used at all times with chlorine.



5. There have been no releases of chlorine at the City of Natchitoches' Water

Treatment Plant in the last five years.



6. Coordination with the local emergency responders has been adopted and all personnel are being trained in the proper emergency response.