Washington Administrative Code › Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508) › Chapter 173-401 - Operating permit regulation › Part V - PERMIT APPLICATIONS › Section 173-401-533 - Units and activities defined as insignificant on the basis of size or production rate

Current through Register Vol. 24-14, July 15, 2024
(1) General. This
				section contains lists of units or activities that are exempt from this chapter
				on the basis of size or production rate. Units and activities listed in this
				section must be listed on the permit application.
(2) The following units and activities are
				determined to be insignificant based on their size or production rate:
(a) Operation, loading and unloading of
				storage tanks and storage vessels, with lids or other appropriate closure and
				less than two hundred sixty gallon capacity (35 cft), heated only to the
				minimum extent to avoid solidification if necessary.
(b) Operation, loading and unloading of
				storage tanks, not greater than one thousand one hundred gallon capacity, with
				lids or other appropriate closure, not for use with hazardous air pollutants
				(HAPs), maximum (max.) vp 550mm Hg.
(c) Operation, loading and unloading of VOC
				storage tanks (including gasoline storage tanks), ten thousand gallons capacity
				or less, with lids or other appropriate closure, vp not greater than 80mm Hg at
				21°C.
(d) Operation, loading
				and unloading storage of butane, propane, or liquified petroleum gas (LPG),
				storage tanks, vessel capacity under forty thousand gallons.
(e) Combustion source less than five million
				Btu/hr. exclusively using natural gas, butane, propane and/or LPG.
(f) Combustion source, less than five hundred
				thousand Btu/hr., using any commercial fuel containing less than 0.4% by weight
				sulfur for coal or less than 1% by weight sulfur for other fuels.
(g) Combustion source, of less than one
				million Btu/hr. if using kerosene, No. 1 or No. 2 fuel oil.
(h) Combustion source, not greater than five
				hundred thousand Btu/hr. if burning used oil and not greater than four hundred
				thousand Btu/hr. if burning waste wood or waste paper.
(i) Welding using not more than one ton per
				day of welding rod.
(j) Foundry
				sand molds, unheated and using binders with less than 0.25% free phenol by sand
				weight.
(k) "Parylene" coaters
				using less than five hundred gallons of coating per year.
(l) Printing and silkscreening, using less
				than two gallon/day of any combination of the following: Inks, coatings,
				adhesives, fountain solutions, thinners, retarders, or nonaqueous cleaning
				solutions.
(m) Water cooling towers
				and ponds, not using chromium-based corrosion inhibitors, not used with
				barometric jets or condensers, not greater than ten thousand gpm, not in direct
				contact with gaseous or liquid process streams containing regulated air
				pollutants.
(n) Combustion
				turbines, of less than 500 HP.
(o)
				Batch solvent distillation, not greater than fifty-five gallons batch
				capacity.
(p) Municipal and
				industrial water chlorination facilities of not greater than twenty million
				gallons per day capacity. The exemption does not apply to waste water
				treatment.
(q) Surface coating,
				using less than two gallons per day.
(r) Space heaters and hot water heaters using
				natural gas, propane or kerosene and generating less than five million
				Btu/hr.
(s) Tanks, vessels, and
				pumping equipment, with lids or other appropriate closure for storage or
				dispensing of aqueous solutions of inorganic salts, bases and acids excluding:
(i) 99% or greater
				H2SO4 or
				H3PO4
(ii) 70% or greater
				HNO3
(iii)
				30% or greater HCl
(iv) More than
				one liquid phase where the top phase is more than one percent VOCs.
(t) Equipment used exclusively to
				pump, load, unload or store high boiling organic material, material with
				initial boiling point (IBP) not less than 150°C. or vapor pressure (vp) not
				more than 5mm Hg at 21°C. with lids or other appropriate closure.
(u) Smokehouses under twenty square
				feet.
(v) Milling and grinding
				activities, using paste-form compounds with less than one percent
				VOCs.
(w) Rolling, forging,
				drawing, stamping, shearing, or spinning hot or cold metals.
(x) Dip-coating operations, using materials
				with less than one percent VOCs.
(y) Surface coating, aqueous solution or
				suspension containing less than one percent VOCs.
(z) Cleaning and stripping activities and
				equipment, using solutions having less than one percent VOCs by weight. On
				metallic substrates, acid solutions are not considered for listing as
				insignificant.
(aa) Storage and
				handling of water based lubricants for metal working where the organic content
				of the lubricant is less than ten percent.
(bb) Municipal and industrial waste water
				chlorination facilities of not greater than one million gallons per day
				capacity.