4.7.4.1.(2)

Intent 1:

To limit the probability that normal train operations will lead to excessive vibrations or ground settling, which could lead to the failure of flammable or combustible liquid piping systems at the loading and unloading facilities, which could lead to the escape of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to harm to persons.

Intent 2:

To limit the probability that a train derailment will lead to impact with or damage to the flammable or combustible liquid piping systems at the loading and unloading facilities, which could lead to the failure of the piping systems, which could lead to the escape of liquid, which could lead to the accumulation and subsequent ignition of vapour from a nearby ignition source, which could lead to harm to persons.

Intent 3:

To limit the probability that a fire involving railway cars will spread to the flammable or combustible liquid piping systems at the loading and unloading facilities, which could lead to harm to persons nearby.

Intent 4:

To limit the probability that a fire involving the flammable or combustible liquid piping systems at the loading and unloading facilities will spread to the railway cars, which could lead to harm to persons nearby.