houstonlogo rjilogo

The Right-to-Know Network

Back to search

Fazendville Wastewater Treatment Plant

Parent Companies:
Department of Public Works
St. Bernard Parish
EPA Facility ID:
100000015814
Other ID:
LA0040975
Facility DUNS:
20856340
Parent Company #1 DUNS:
0
Parent Company #2 DUNS:
612127423

Location:

Address:
Fazendville Road
Chalmette, LA 70043
County:
ST. BERNARD
Lat / Long:
29.938, -89.999 (Get map)
Method:
Public Land Survey - Section
Description:
Center of Facility
Horizonal accuracy:
m
Horizontal reference datum:
Source map scale:

Owner/Operator:

Name:
St. Bernard Parish Government
Phone:
(504) 271-1681
Address:
P.O. Box 1278
1111E. St. Bernard Highway
Chalmette, LA 70044 -1278
Foreign Address:

Person responsible for RMP implementation:

Name:
Christopher J. Gregus
Title:
Resident Engineer
Email:

Emergency contact:

Name:
Glenn B. Cooper
Title:
Plant Manager
Phone:
(504) 271-1681
24-hour phone:
(504) 271-1681
Ext or PIN:
Email:

Other contacts:

Facility (or company) email:
Facility phone:
(504) 271-1681
Facility (or company) URL:

Safety:

Local Emergency Planning Committee:
St. Bernard Parish LEPC
Full-Time Equivalent Employees:
3
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:
Feb. 24, 1999
Inspecting Agency:
Fire Department
Using Predictive Filing:
No

Processes:

Chlorine Disinfection
RMP ID:
24624
CBI claimed:
No
Program Level:
2
NAICS:
Sewage Treatment Facilities (22132)
Chemical name
CAS#
Quantity (lbs.)
CBI
Chlorine
7782-50-5
12,000
No
Public OCA Chemical
0
No

RMP Preparer:

Name:
Address:

,
Foreign Address:

Phone:

Latest RMP Submission:

Date:
Sept. 2, 1999
Type:
Correction of existing RMP
Reason:
Registered:
No
RMP ID:
17483

Deregistration:

Date:
Effective Date:
Reason:
Source reduced inventory of all regulated substances below TQs
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 Chlorine Disinfection)
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:
  • None
not considered:
  • Dikes
  • Enclosures
  • 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 Chlorine Disinfection)
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:
  • None
not considered:
  • Dikes
  • Enclosures
  • Berms
  • Drains
  • Sumps
Active mitigation
considered:
  • None
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

Chlorine Disinfection, Sewage Treatment Facilities (22132)
Prevention Program ID:
9451
Safety Review Date
April 19, 1999, since latest RMP submission
PHA Update Date
, since latest RMP submission
Safety Regulations
  • None
Hazards Identified
  • Toxic Release
  • Equipment failure
Process Controls
  • Manual Shutoffs
  • Alarms
Mitigation Systems
  • None
Monitoring Systems
  • Process Area
Changes since PHA
  • Process Controls
  • Process Detection
Training Type
  • Classroom
  • On the Job
Competency Testing
  • Observation
Procedure Review Date
April 19, 1999, since latest RMP submission
Training Review Date
April 7, 1999, since latest RMP submission
Maintenance Review Date
June 1, 1999, since latest RMP submission
Maintenance Inspection Date
June 1, 1999, 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
June 14, 1999
Compliance Audit Change Completion Date
Dec. 31, 2001
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:
June 14, 1999
Local Response Agency:
Local Response Agency Phone:
(504) 278-4582
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

19246 LDEQ FACILITY ID NUMBER

RISK MANAGEMENT PLAN FOR

FAZENDVILLE WASTEWATER TREATMENT PLANT

ST. BERNARD PARISH

EXECUTIVE SUMMARY


INTRODUCTION

In 1990, the United States Congress amended the Clean Air Act to address Chemical
Accident Prevention by requiring the USEPA to develop chemical accident prevention/community
right-to-know regulations referred to as the Risk Management Program Rule.
The Rule requires covered facilities, whether they be Public, Commercial, or Industrial
entities, to create and implement a risk management/accident prevention program and to submit a
structured Risk Management Plan (RMP) to the USEPA by not later than June 21, 1999. A covered
facility is one that stores any of a long list of dangerous chemicals (e.g., chemicals that are either
toxic, flammable, or explosive), in quantities greater than the threshold levels listed in the Rule.
Listed toxic chemicals and their respective threshold quantities can be found in the Federal
Regulations at 40 CFR 68.
The stationary (potential) source that is addressed herein is the Fazendville Wastewater
Treatment Plant. The Plant's location is identified as follows:

1) Street Address: Fazendville Road (no street number)
Chalmette, LA 70043

2) Geographical Location: 29o56'17" North Latitude
89o59'56" West Longitude


Chlorine gas, an air toxic chemical, is listed. Chlorine is used by most water treatment and
wastewater treatment plants as a disinfectant. The threshold quantity listed for chlorine is 2,500
pounds. The Fazendville Wastewater Treatment Plant stores chlorine gas in quantities that exceed
the threshold quantity and, as a result, is a covered facility. Accordingly, St. Bernard Parish has
conducted a Program 2 Hazard Review,
a Compliance Audit, and developed this RMP for the
wastewater treatment plant. The Parish also is preparing written Safety, O&M, and Emergency
Response Plans for the safe handling of the toxic gas, as required by the USEPA.
It is pertinent to note, however, that the Fazendville Wastewater Treatment Plant has been
in continuous operation for more than 22 years. During that long operational history, there has never
been a release of chlorine gas of such a magnitude so as to cause injury to people, pets or property
surrounding the wastewater treatment plant.
Pure chlorine gas (an air toxic), used to disinfect the Parish's treated wastewater supply, is
received and stored at the above location in the form of a gas that is liquified under pressure. The
liquified chlorine gas is supplied in steel pressure cylinders that contain one ton (2000 lbs) of
chlorine when received. Typical inventory of chlorine at the Fazendville Wastewater Treatment
Plant is six ton cylinders.

OFF-SITE CONSEQUENCE ANALYSIS
"Worst-Case" Scenario
The USEPA regulations require an assessment of risk and emergency response planning for
accidental release of any of the listed air toxics under two (or more) different scenarios. That is, the
regulations call for analysis/planning for a "worst-case" scenario based on rigid scenario conditions
for any air toxic. These "worst-case" scenario - required conditions are identified as follows:

Release Duration 10 minutes
Quantity of Air Toxic Released 2000 lbs
Release Rate 200 lbs/min
Endpoint Toxic Concentration (safe level) 0.0087 mg/l
Windspeed 1.5 M/sec (3.36 mph)

Meteorological Stability Conditions "F"
Ambient Relative Humidity 50 % (rare in New Orleans area)
Ambient Air & Chemical's Temperature
(before release) 77o (OK for air, not for chemical
which drops temperature as released)



Under the USEPA's regulations the above requirements must be plugged into any offsite
consequence analysis (OCA) modeling, regardless if any of the factors are unrealistic or very
unlikely to occur. The resulting risk area for this "worst-case" scenario was determined from the
USEPA's Risk Management Program Guidance for Wastewater Treatment Plants for the
Fazendville Wastewater Treatment Plant. For an urban setting, such as is the condition at the
Fazendville Wastewater Treatment Plant, the distance to the endpoint (or safe exposure distance) is
listed in Exhibit 4-12 in the Guidance document as a 1.3 miles radius around the wastewater
treatment plant.
Additionally, the USEPA regulations provide for consideration of passive mitigation in
"worst-case" assessments, i.e., enclosure of air toxic containers/feed systems within a building is
considered a valid, passive mitigation condition. Passive mitigation presence provides for a toxic
gas release area reduction of 45 percent (i.e., by multiplying the model "worst-case" radius by a
factor of 0.55). However, the Fazendville Wastewater Treatment Plant has no passive mitigation
present. Thus, the USEPA's model endpoint for chlorine remains 1.3 miles for the Fazendville
Wastewater Treatment Plant in the "worst-case" scenario.

Alternative Scenario
The regulations also permit planners to provide one or more realistic, alternative scenarios
involving accidental release of air toxics. The alternative scenario consi
dered for the Fazendville
Wastewater Treatment Plant was based on a tubing failure, a bad connection or valve failure
resulting in the release of chlorine gas through a 5/16 inch-diameter whole or opening in a ton
cylinder.
This scenario was modeled by the USEPA study, (see Exhibit 4-15 in the Guidance
document) and produced the following information. The release described above would last for 60
minutes with an average maximum gas flow rate of 15 lbs/min. Again, for an urban setting, the
release impact area, i.e., the distance from the source out to the endpoint concentration for chlorine
(0.0087 mg/l or 3 ppm) was found to be 0.1 miles.
Further, while only passive mitigation can be considered for the "worst-case" scenario, the
regulations permit inclusion of active mitigation factor(s) for the alternative scenario modeling that
can further reduce the estimated toxic gas spread area (i.e., distance to endpoint). A few examples
of active mitigation are air scrubbers, emergency shut-down systems, and sprinkler systems.
However, the Fazendville Wastewater Treatment Plant employs no form of active mitigation. Thus,
the USEPA's model endpoint for chlorine remains 0.1 miles for the Fazendville Wastewater
Treatment Plant in the "alternative" scenario.
The Parish has developed a toxic gas release Emergency Response Plan (ERP) that is
applicable to both the Parish's Water and Wastewater Treatment Plants. The plan has been
coordinated with the Parish's Fire and Police Departments.
During the operational history of the plant and certainly for the past 5 years, there have been
no toxic gas releases from the plant.