Haw. Code R. § 11-453-18 - Calculation of quantities for comparison with threshold planning quantities for solids and mixtures
(a) If a container
of storage vessel holds a mixture or solution of an extremely hazardous
substance, then the concentration of extremely hazardous substance, in weight
per cent (greater than one per cent), shall be multiplied by the mass (in
pounds) in the vessel to determine the actual quantity of extremely hazardous
substance therein. If the concentration of an extremely hazardous substance is
less than or equal to one per cent in the mixture, you do not have to count
that extremely hazardous substance.
(b) You must aggregate (i.e., add together)
the amounts of each extremely hazardous substance at your facility to determine
if a threshold planning quantity is present. This means that, for a particular
extremely hazardous substance, you must determine the total amount present at
any one time at your facility by adding together the quantity of pure extremely
hazardous substance and the quantity contained in all mixtures, regardless of
location, number of containers, or method of storage. You do not have to count
an extremely hazardous substance in a mixture if the concentration of that
extremely hazardous-substance is less than or equal to one per cent.
(c) Extremely hazardous substances that are
solids are subject to either of two threshold planning quantities as shown in
title 40 Code of Federal Regulations part 355, appendices A or B (e.g., lower
threshold planning quantity/upper threshold planning quantity). The lower
threshold planning quantity applies only if the solid exists in powdered form
and has a particle size less than one hundred microns; or is handled in
solution or in molten form; or meets the criteria for a National Fire
Protection Association rating of two, three, or four for reactivity. If the
solid does not meet any of these criteria, it is subject to the upper threshold
planning quantity as shown in title 40 Code of Federal Regulations part 355,
appendices A or B.
(d) The one
hundred micron level may be determined by multiplying the weight per cent of
solid with a particle size less than one hundred microns in a particular
container by the quantity of solid in the container.
(e) The amount of solid in solution may be
determined by multiplying the weight per cent of solid in the solution in a
particular container by the quantity of solution in the container.
(f) The amount of solid in molten form must
be multiplied by 0.3 to determine whether the lower threshold planning quantity
is met.
(g) For purposes of this
rule "mixture" means a heterogeneous association of substances where the
various individual substances retain their identities and can usually be
separated by mechanical means. Includes solutions or compounds but does not
include alloys or amalgams.
Notes
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No prior version found.