Environmental Engineering Reference
In-Depth Information
tABle 1.1
justiication Formula rating summary sheet
Factor
classiication
rating
Consequences
Catastrophe;.numerous.fatalities;.damage.over.$1,000,000;.
major disruption.of.activities
100
Most.probable.result.of.
the.potential.accident:
Multiple.fatalities;.damage.$500,000.to.$1,000,000
50
Fatality,.damage.$100,000.to.$500,000
25
Extremely.serious.injury.(amputation,.permanent.disability);.
damage.$1000.to.$100,000
15
Disabling.injury;.damage.up.to.$1000
5
Minor.cuts,.bruises,.bumps;.minor.damage
1
Exposure
Hazard-event occurs:
The.frequency.of.
occurrence.of.the.
hazard.event:
Continuously.(or.many.times.daily)
10
Frequently.(approximately.once.daily)
6
Occasionally.(from.once.per.week.to.once.per.month)
3
Usually.(from.once.per.month.to.once.per.year)
2
Rarely.(it.has.been.known.to.occur)
1
Remotely.possible.(not.known.to.have.occurred)
0.5
Probability
Complete accident sequence:
Likelihood.that.
accident.sequence.will.
follow.to.completion:
Is.the.most.likely.and.expected.result.if.the.hazard-event.takes.place
10
Is.quite.possible,.not.unusual,.has.an.even.50/50.chance
6
Would.be.an.unusual.sequence.or.coincidence
3
Would.be.a.remotely.possible.coincidence
1
Has.never.happened.after.many.years.of.exposure,.but.is.
conceivably.possible
0.5
Practically.impossible.sequence.(has.never.happened)
0.1
Cost.Factor
Over.$50,000
10
Estimated.dollar.cost.of.
proposed.corrective.
action:
$25,000.to.$50,000
6
$10,000.to.$25,000
4
$1,000.to.$10,000
3
$100.to.$1,000
2
$25.to.$100
1
Under.$25
0.5
Degree.of.Correction
Degree.to.which.hazard.
will.be.reduced:
Hazard.positively.eliminated,.100%
1
Hazard.reduced.at.least.75%
2
Hazard.reduced.50%.to.75%
3
Hazard.reduced.by.25%.to.50%
4
Slight.effect.on.hazard.(less.than.25%)
6
