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HAZMAT 28FEB11

Important Notes for Exam

QuestionAnswer
What are the methods of determining the pressure in bulk packaging facility containers? 1) Use of temperature gauges with vapor pressure/temperature conversion charts. 2) If using ambient temperature, recognize that the temperature of the tank's contents may lag ambient temperatures up to 6 hours.
What are the methods for determining the amount of lading remaining in damaged bulk packaging or facility containers? 1) Look at shipping or other recording documents for the amount of material the container held before the breach or spill. Estimate the amount spilled and then subtract that figure from the amount listed on the shipping or other recording document.
What are some examples of Container specification markings? 1) UN Symbol 2) Packaging identification code 3) Performance standard 4) Maximum rated specific gravity 5) Container origination 6) Authorizing state (country) 7) Minimum thickness for reuse 8) Test pressure in kilopascals
What are two methods of estimating the loss of a product from a container? Gauging and Frost Line
What is the name of the computerized system that tracks gas migration through a pipeline? SCADA: Supervisory Control and Data Acquisition System
What are the capabilities of SCADA? The system monitors the materials flow and the pressure within the pipeline. Loss in pressure could represent a possible leak, which can be pinpointed by the system.
What are the types of damage that a pressure container or tank car could incur? 1) Crack 2) Scores 3) Gouges 4) Dents
Define Crack in relation to container damage. 1) A narrow split or break in the container metal that can penetrate through the metal. 2) Should be considered critical since it is difficult to determine the depth of a crack. 3) Warrant off-loading prior to moving.
Define Scores in relation to container damage. 1) A reduction in the thickness of the container shell made by a blunt object. 2) Not considered critical unless the score cuts into the heat-affected area of a welded seam. 3) If considered critical, off-load prior to moving.
Define Gauges in relation to container damage. 1) A reduction in the thickness of the container shell made by a sharp, chisel-like object. 2) Characterized by the complete removal of the container metal or weld along the track of the object.
Define Dents in relation to container damage. 1) A deformation of the container metal caused by impact with a blunt object. 2) Not considers critical unless gouges are also present.
Resources that are available that indicate the effects of mixing various hazardous materials. 1) Guide to Hazardous Chemicals -NFPA 491M 2) Handbook of Reactive Chemical Hazards - Bretherick 3) Hazardous Chemicals Desk Reference - Lewis
What does the NFPA 491M contain? The guide contains information on parameters to determine the degree and extent of hazardous locations for liquids, gases, and vapors; storage requirements, including organic peroxide classification and "diamond" ratings for 160 chemicals...
What does the Bretherick contain? Every chemical to which documented information on reactive hazards has been found. The text covers over 5000 elements and compounds and as many again of secondary entries involving two or more compounds....
What does the Lewis contain? Safety profiles, synonyms, physical properties, standards, and recommendations of government agencies for approx. 5,000 chemicals deemed both important and potentially hazardous by the international scientific community.
What are some examples of fire and safety features? 1) Fire protection systems 2) Monitoring and detection systems 3) Product spillage and control (impoundment and diking) 4) Tank spacing 5) Tank venting and flaring systems 6) Transfer operations
What is the purpose of fire protection systems? Allows for the application of fire extinguishing agents quicker and to manage an incident in its early stages. The quick control of the incident, results in the reduction of the hazard to nearby containers.
What is the purpose of monitoring and detection systems? Allows for the initiation of control actions while an incident is still relatively small. Early notification, limits threats to other containers.
What is the purpose of product spillage and control (impoundment and diking)? 1) Minimize the exposure to adjoining tanks 2) Where protection of adjoining property or waterways is by means of impounding by diking around the tanks...
What is the criteria for impoundment and diking around tanks? A slope of not less than 1% away from the tank shall be provided for at least 50ft or to the dike base, whichever is less. Walls of the diked area shall be earth, steel, concrete, or solid masonry designed to be liquid tight that can hold 110% product.
What is the purpose of tank spacing? It will minimize the hazard to uninvolved tanks (Floating Roof, Fixed, or Horizontal) not over 150ft in diameter, shall be 1/6th the sum of the adjacent tanks diameter but no less than 3 feet apart.
What is the purpose of Tank venting and flaring systems? Minimize the threat of a rupture thus keeping the size of the endangered area from increasing.
What is the purpose of Transfer operations? It will ensure the compatibility of substances in the receiving container or tank vehicle, with the incoming material. Ensure proper electrical grounding and stopping techniques for the container or tank truck...
What are the local resources for determining dispersion pattern prediction and modeling including computers, monitoring equipment, or specialist in the field? 1) Weather 2) Computer Models 3) Industrial Facilities 4) Colleges and Universities 5) County, State, or Federal Agencies a. Health Departments b. Environmental Protection Agencies c. US Coast Guard
What are the steps for determining the extent of the physical, safety, and health hazards within the endangered area of a hazardous materials incident? 1) Determine concentration 2) Determine acceptable exposure limits
What are the methods for predicting the areas of potential harm without the endangered area of a hazardous materials incident? 1) Computer modeling 2) Monitoring equipment 3) Technical assistance 4) Specialist
What is the process for estimating the potential outcomes within an endangered area at a hazardous materials incident? 1) Determine the dimensions of the endangered area. 2) Estimate the number of exposures 3) Measure or predict the concentration of material w/i endangered area. 4) Estimate hazard to People, Property, Environment. 5) ID areas of potential harm 6) Out
What are the three components of an incident? 1) The Product 2) The Container 3) The Environment
What are the three elements of an incident? 1) A Spill 2) A Leak 3) A Fire
What are the US EPA guidelines for areas with flammable vapors? 1) <10% LEL - continue working with caution 2) 10% - 25% LEL - continue working with continuous monitoring 3) >25% LEL - WITHDRAW (EVACUATE)
Action options and response objectives 1) Offensive 2) Defensive 3) Nonintervention
What are action options and response objective based on: 1) Estimated outcomes 2) Stage of the incident
What are the considered strategic goals? 1) Stopping the event now occurring 2) Keeping future events from occurring
What are some examples of Response Objectives? 1) Change applied stress 2) Change breach size 3) Change Quantity released 4) Change size of the danger zone 5) Change exposures contacted 6) Change severity of harm Action options can be offensive, defensive, or nonintervention.
Methods to change applied stress? 1) Move stressor 2) Move stressed system 3) Shield stressed system
Methods to change breach size? 1) Chill contents 2) limit stress levels 3) Activate venting devices 4) Mechanical repair
Methods to change quantity released? 1) Change container position 2) Minimize pressure differential 3) Cap off breach 4) Remove contents
Methods to change size of danger zone? 1) Barriers (dike, dam) 2) Adsorbents 3) Absorbents 4) Dilution 5) Reactants 6) Overpack
Methods to change exposure contacted? 1) Provide sheltering 2) Begin evacuation 3) PPE
Methods to change severity of harm? 1) Rinse off contamination 2) Increase distance from source 3) Provide shielding 4) Provide prompt medical attention.
What stance can actions options take? Offensive, Defensive, and Nonintervention
Created by: oldsmaug
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