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6. Five-Year Accident History
Complete a separate record for each accidental release from covered processes that
occurred within the last five years and that resulted in deaths, injuries, or significant
property damage on site, or known offsite deaths, injuries, evacuations, sheltering in
place, property damage, or environmental damage.
6.1 Date: Indicate the date on which the accident occurred.
6.2 Time: Indicate the time the release began.
6.3 Release duration: Indicate the approximate length of time of the release in
minutes.
6.4 Chemical(s): Indicate the regulated substance(s) released.
6.5 Quantity released: Indicate the amount of each substance released in pounds.
6.6 Release event: Indicate with a check mark which of the following release
events best describes your accident.
Gas Release: A release of the substance in a vapor state.
Liquid Spill/Evaporation: A release of the substance in a liquid
state with subsequent vaporization.
Fire: A product (e.g., fuel) in a state of combustion.
Explosion: A rapid chemical reaction with the production of
noise, heat, and violent expansion of gasses.
6.7 Release source: Indicate which best describes the source of the release.
Check all that apply.
Storage Vessel: A container for storing, holding, or transporting
a liquid.
Piping: A system of pipes used to carry a fluid.
Process Vessel: A container in which regulated substances are
blended to form a mixture or reacted to convert them into some other final product or
form.
Transfer Hose: A connection between two or more vessels.
Valve: A structure that closes temporarily a passage or permits
movement of fluid in one direction only.
Pump: A device that raises, transfers, or compresses fluids or
that attenuates gases by suction or pressure or both.
6.8 Weather conditions at time of event (if known): This information is
important to those concerned with predicting the effects of accidents. Reliable
information from those involved in the incident is better information than can be obtained
from a meteorological weather station located miles from the incident site. Complete as
much of the following as possible.
Wind Speed/Direction: Wind speed is an estimate of how fast the
wind is traveling. Indicate the speed in miles per hour, meters per second, or knots. Be
sure to identify the units of measure. Wind direction is the direction from which the wind
comes. For example, a wind that blows from west to east comes from the west. You may
describe the direction that the wind blows from as a standard compass reading such as
"Northeast" or "South-southwest." You may also describe
the direction in degrees with North as zero degrees and East as 90 degrees. Thus northeast
would represent 45 degrees, and south-southwest would represent 202.5 degrees.
Abbreviations for the wind direction such as NE (for northeast) and SSW (for
south-southwest) are also acceptable.
Temperature: The ambient temperature at the scene of the accident
in degrees Fahrenheit.
Stability Class: This is a general indication of the degree of
mixing present in the atmosphere accounting for windspeed and sunlight. The designation
ranges from "A to F," where "A" represents extremely unstable
conditions (high mixing) and "F" represents extremely stable or clam (little
mixing) conditions. "F" conditions occur on overcast nights with low wind speeds
and "A" conditions occur on clear days at high wind speeds. See the RMP OCA
guidance for more information.
Precipitation Present: Check yes or no based on whether there was
precipitation at the time of the accident.
Unknown: If you have no record of weather conditions check this.
6.9 On site impacts: Complete as much of the following as possible about on-site
effects.
Deaths: Indicate the number of on-site deaths that are attributed
to the accident or mitigation activities. On-site deaths means the number of employees or
contract employees who were killed during the accident of performing any mitigation
activities. What about offsite response contractors?
Injuries: Indicate the number of employees or contract personnel
who were injured as a result of the accident or mitigation activities. An injury may or
may not involve lost work time. An injury means any effect that results either from direct
exposure to toxic concentrations, radiant heat, or overpressures from accidental releases
or from the direct consequences of a vapor cloud explosion from an accidental release that
requires medical treatment or hospitalization. Medical treatment means treatment, other
than first aid, administered by a physician or registered professional personnel under
standing orders from a physician.
Property Damage: Estimate the value of the equipment or business
structures (for your business alone) that were damaged by the accident or mitigation
activities. Record the value in American dollars. Do not include any losses that you may
have incurred by business interruption.
6.10 Known offsite impacts: These are impacts that you are aware of or that were
reported to the source. You are not required to conduct additional investigation to
determine offsite impacts. Offsite means areas beyond the property boundary of the source
or areas within the property boundary to which the public has routine and unrestricted
access during or outside business hours.
Deaths: Indicate the number of offsite deaths that are
attributable to the accident or mitigation activities. Offsite deaths means the number of
community members and members of public response agencies who were killed during the
accident or performing any mitigation activities.
Hospitalizations: Indicate the number of injuries that are
attributable to the accident or mitigation activities where community members or members
of response agencies required hospitalization due to the injury.
Other Medical Treatment: Indicate the number of injuries that are
attributable to the accident or mitigation activities where community members or members
of response agencies required medical treatment, not including first aid, due to the
injury.
Evacuated: Indicate the number of members of the community who
were evacuated as a result of the accident. A total count of the number of people
evacuated is preferable to the number of houses evacuated.
Sheltered: Indicate the number of members of the community who
were sheltered-in-place during the accident. Sheltering-in-place is the official
designation when the incident commander orders community members to remain inside their
residence or place of work until the emergency is over to prevent exposure to the
substance. Usually these are associated with an emergency broadcast or similar method of
mass notification by response agencies.
Property Damage: Estimate the value of any property (not
belonging to the source) that may have been damaged as a result of the accident. Record
the value in American dollars. Include the value of damages to any response equipment.
Environmental Damage: Indicate whether any environmental damage
occurred and specify the type. The damage is not limited to environmental receptors listed
in the rule. Any damage to the environment (e.g., defoliation, water contamination) should
be considered. You are not, however, required to conduct surveys to determine whether such
impact occurred.
6.11 Initiating event: Indicate with a check mark the initiating event that best
describes the cause of the accident, if known.
Equipment Failure: A device or piece of equipment did not
function as designed.
Human Error: An operator performs an operation improperly.
Weather Condition: Weather conditions, such as lightning, hail,
ice storms, tornados, hurricanes, floods, or high winds caused the accident.
6.12 Contributing factors: These are factors that contributed to the accident
occurring but were not the initiating event, if known. Check all that apply.
Equipment Failure: A device or piece of equipment did not
function as designed thereby allowing a substance to be released.
Human Error: An operator performs an operation improperly or
makes a mistake resulting in a release.
Improper Procedures: The procedure did not reflect the current
method of operation, the procedure omitted steps that affected the accident, or the
procedure was written in a manner that allowed for mis-interpretation of the instructions.
Overpressurization: The process was operated at pressures
exceeding the design working pressure.
Upset Condition: Release caused by incorrect process conditions
(e.g., increased temperature or pressure).
By-pass Condition: A pipe or channel that provides an alternate
pathway that detours the main pathway fails releasing a substance.
Maintenance Activity/Inactivity: This is any failure that occurs
because of maintenance activity or inactivity. For example, the pipes remain unpainted for
so long that corrosion caused the pipe to fail, or the maintenance mechanic began to
repair the wrong pump.
Process Design: Any failure that may be design related.
Unsuitable Equipment: The equipment used was incorrect for the
process.
Unusual Weather Condition: Weather conditions, such as lightning,
hail, ice storms, tornados, hurricanes, floods, or high winds caused the accident.
Management Error: This may be used to describe failures that
occur because management did not exercise its managerial control to prevent the situation
from occurring. This is usually used to describe faulty procedures, inadequate training,
or failure to follow existing administrative procedures.
6.13 Offsite responders notified: Indicate with a check mark whether agencies
were contacted.
6.14 Changes introduced as a result of the accident: Indicate with a check mark
any measures that you have taken at the source to prevent recurrence of the accident.
Improved/Upgraded Equipment: A device or piece of equipment that
did not function as designed was repaired or replaced.
Revised Maintenance: Maintenance processes were clarified or
changed to ensure safe operation and timely maintenance.
Revised Training: Training programs were clarified or changed to
ensure that employees and contract employees are aware of and are practicing correct
safety, process, and administrative procedures.
Revised Operating Procedures: Operating procedures were clarified
or changed to ensure that employees and contract employees are trained on process
operating procedures.
New Process Controls: New process designs and controls were
installed to correct problems and prevent recurrence of an accidental release.
New Mitigation Systems: New mitigation systems were initiated to
limit accidental releases.
Revised Emergency Response Plan: The emergency response plan was
revised.
Changed process
Reduced Inventory: Inventory was reduced at the source to prevent
accidental release.
Other
None
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