Modeling with CAMEO

Les Benedict

St. Regis Mohawk Tribe

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Modeling Tools

Computer Aided Management of Emergency Operations (CAMEO)

Areal Locations of Hazardous Atmospheres (ALOHA)

Mapping Applications for Response, Planning, and Local Operational Tasks (MARPLOT)

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CAMEO

CAMEO Chemical search engine Linked to chemical-specific information

firefighting techniques, cleanup procedures, and protective clothing

Basic information on Tier II facilities that store chemicals

Emergency planning resources

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ALOHA

ALOHA Atmospheric dispersion model used for

evaluating releases of hazardous chemical vapors

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MARPLOT

MARPLOT Allows users to "see" data (e.g., roads,

facilities, schools, response assets) Display information on computer maps Overlay areas contaminated by potential

or actual chemical release Maps created from U.S. Bureau of

Census TIGER/Line files

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Statutes

Clean Air Act section 112(r) Section 112(r) of amended

Clean Air Act (CAA) signed into law November 15, 1990

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Managing Risk

Risk Management Planning Affect facilities that produce, handle,

process, distribute, or store certain chemicals

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Health and Safety

Objective of section112(r) is to prevent serious chemical accidents Potential to affect public

health and the environment

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Health and Safety (cont.)

Broadest sense risk management planning Relates to local emergency

preparedness and response Pollution prevention Worker safety

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Regulated Substances

139 regulated substances 77 acutely toxic substances 63 flammable gases and volatile

liquids Division 1.1 high explosives as

listed by DOT

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Quantities

Threshold quantities For toxics ranging from 500 to

20,000 pounds For all listed flammables, the

threshold quantity is 10,000 pounds

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Range of Regulation

EPA estimates approximately 66,000 sources will be covered

Compliance as of June 20, 1999 (40 CFR part 68)

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RMP

RMP (risk management plan) basics  Offsite consequence analysis Evaluates specific potential release

scenarios Worst-case and alternative scenarios 5-year history of certain accidental

releases

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RMP (cont.)

RMP basics Integrated prevention program to

manage risk Emergency response program Overall management system to

supervise implementation of these program elements

RMP revised at least once every 5 years

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Modeling

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Web Resources

It’s… Free On the web Easy to use

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Modeling

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Modeling

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Modeling

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Chemical Library

Use CAMEO for CAA-related projects Check substance's Chemical Library record

Covered under Section 112®? If so, check threshold quantity

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Offsite Consequences Analysis

Screening & Scenarios module NOT for offsite consequence analyses required under Section 112(r)

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Gas Density

Screening & Scenarios makes only Gaussian dispersion calculations, but…

RMP Rule specifies you must "appropriately account for gas density.”

Another technique required for modeling heavy gases (Gaussian calculations designed for neutrally buoyant gases)

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Other Models

SLAB: dense gas dispersion DEGADIS: refined, models short-term

ambient concentrations and expected area of exposure for toxic chemical releases

Many commercial model$ available

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Modeling: The Big Picture

Main purpose for this class Visualize changes

Weather Surface roughness Terrain Chemical characteristics

Relate impacts to geography

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Demonstration