1. Mapping of Chemical & its
Influence Zone
By using Software
Hardik Kalal

2. Using Software
• ALOHA (Areal Locations of Hazardous
Atmosphere)
• MARPLOT (Mapping Application for Response,
Planning, and Local Operational Tasks)
• CAMEO

3. Chlorine Introduction
 PROPERTIES-: Greenish-yellow gas, Pungent, irritating
& suffocating odour.
 SYMPTOMS-: Symptoms of exposure to chlorine gas
also include nausea, headache, dizziness and syncope,
muscle weakness, choking (cramps in the pharyngeal
muscles), epigastria pain, a feeling of suffocation,
dermatitis, retrosternal burning and sub-sternal pain,
respiratory distress, shortness of breath, pneumonia,
bronchospasm and acute lung injury.
Bronchopneumonia or respiratory collapse may be
lethal complications.

4. Chlorine Analysis
 CHEMICAL DATA
 Chemical Name: CHLORINE
 Molecular Weight: 70.91 g/mol
 AEGL-1 (60 min): 0.5 ppm AEGL-2 (60 min): 2
ppm AEGL-3 (60 min): 20 ppm
 ATMOSPHERIC DATA: (MANUAL INPUT OF
DATA)
 Wind: 6 meters/second from E at 3 meters
 Ground Roughness: open country
 Air Temperature: 42° C
 Relative Humidity: 5%
 SOURCE STRENGTH:
 Leak from hole in horizontal cylindrical tank
 Non-flammable chemical is escaping from tank
 Tank Diameter: 2.24 feet
 Tank Length: 6 feet
 Tank Volume: 177 gallons
 Tank contains liquid
 Internal Temperature: 42° C
 Chemical Mass in Tank: 900 kilograms
 Tank is 100% full
 Circular Opening Diameter: 1.27 centimeters
 Opening is 1 centimeters from tank bottom
 Release Duration: 4 minutes
 Max Average Sustained Release Rate: 250
kilograms/min (averaged over a minute or
more)
 Total Amount Released: 898 kilograms
Note: The chemical escaped as a mixture of
gas and aerosol (two phase flow).
 THREAT ZONE: (HEAVY GAS SELECTED)
 Model Run: Heavy Gas
 Red : 1.1 kilometers --- (20 ppm = AEGL-3
[60 min])
 Orange: 3.8 kilometers --- (2 ppm = AEGL-2
[60 min])
 Yellow: 7.5 kilometers --- (0.5 ppm = AEGL-1
[60 min])

5. Threat Zone and Influence zone Mapping

6. Influence zone Mapping with Stages

7. Criteria for Planning
What are at Risk
• Residential area, Market etc
• Schools
• Industries
• Hospitals
• Recourses
Who are at Risk
• Respiratory illness, Aged
People, Chronically illed
• Children
• Labors
• Patients
• Water Bodies, Plantations,
Animals etc
Response in Emergency
Capacity Building

8. THANK YOU!!