WAC 173-400-050
Emission standards for combustion and
incineration units. (1) Combustion and incineration emissions
units must meet all requirements of WAC 173-400-040 and, in
addition, no person shall cause or allow emissions of
particulate matter in excess of 0.23 gram per dry cubic meter
at standard conditions (0.1 grain/dscf), except, for an
emissions unit combusting wood derived fuels for the
production of steam. No person shall allow the emission of
particulate matter in excess of 0.46 gram per dry cubic meter
at standard conditions (0.2 grain/dscf), as measured by EPA
method 5 in Appendix A to 40 CFR Part 60, (in effect on July
1, 2010) or approved procedures contained in "Source Test
Manual - Procedures For Compliance Testing," state of
Washington, department of ecology, as of September 20, 2004,
on file at ecology.
(2) For any incinerator, no person shall cause or allow
emissions in excess of one hundred ppm of total carbonyls as
measured by Source Test Method 14 procedures contained in
"Source Test Manual - Procedures for Compliance Testing,"
state of Washington, department of ecology, as of September
20, 2004, on file at ecology. An applicable EPA reference
method or other procedures to collect and analyze for the same
compounds collected in the ecology method may be used if
approved by the permitting authority prior to its use.
(a) Incinerators not subject to the requirements of
chapter 173-434 WAC or WAC 173-400-050 (4) or (5), or
requirements adopted by reference in WAC 173-400-075 (40 CFR
63 subpart EEE) and WAC 173-400-115 (40 CFR 60 subparts E, Ea,
Eb, Ec, AAAA, and CCCC) shall be operated only during daylight
hours unless written permission to operate at other times is
received from the permitting authority.
(b) Total carbonyls means the concentration of organic
compounds containing the =C=O radical as collected by the
Ecology Source Test Method 14 contained in "Source Test Manual - Procedures For Compliance Testing," state of Washington,
department of ecology, as of September 20, 2004, on file at
ecology.
(3) Measured concentrations for combustion and
incineration units shall be adjusted for volumes corrected to
seven percent oxygen, except when the permitting authority
determines that an alternate oxygen correction factor is more
representative of normal operations such as the correction
factor included in an applicable NSPS or NESHAP, actual
operating characteristics, or the manufacturer's
specifications for the emission unit.
(4) Commercial and industrial solid waste incineration
units constructed on or before November 30, 1999.
(a) Definitions.
(i) "Commercial and industrial solid waste incineration
(CISWI) unit" means any combustion device that combusts
commercial and industrial waste, as defined in this
subsection. The boundaries of a CISWI unit are defined as,
but not limited to, the commercial or industrial solid waste
fuel feed system, grate system, flue gas system, and bottom
ash. The CISWI unit does not include air pollution control
equipment or the stack. The CISWI unit boundary starts at the
commercial and industrial solid waste hopper (if applicable)
and extends through two areas:
(A) The combustion unit flue gas system, which ends
immediately after the last combustion chamber.
(B) The combustion unit bottom ash system, which ends at
the truck loading station or similar equipment that transfers
the ash to final disposal. It includes all ash handling
systems connected to the bottom ash handling system.
(ii) "Commercial and industrial solid waste" means solid
waste combusted in an enclosed device using controlled flame
combustion without energy recovery that is a distinct
operating unit of any commercial or industrial facility
(including field erected, modular, and custom built
incineration units operating with starved or excess air), or
solid waste combusted in an air curtain incinerator without
energy recovery that is a distinct operating unit of any
commercial or industrial facility.
(b) Applicability. This section applies to incineration
units that meet all three criteria:
(i) The incineration unit meets the definition of CISWI
unit in this subsection.
(ii) The incineration unit commenced construction on or
before November 30, 1999.
(iii) The incineration unit is not exempt under (c) of
this subsection.
(c) The following types of incineration units are exempt
from this subsection:
(i) Pathological waste incineration units. Incineration
units burning 90 percent or more by weight (on a calendar
quarter basis and excluding the weight of auxiliary fuel and
combustion air) of pathological waste, low-level radioactive
waste, and/or chemotherapeutic waste as defined in 40 CFR
60.2265 (in effect on July 1, 2010) are not subject to this
section if you meet the two requirements specified in
(c)(i)(A) and (B) of this subsection.
(A) Notify the permitting authority that the unit meets
these criteria.
(B) Keep records on a calendar quarter basis of the
weight of pathological waste, low-level radioactive waste,
and/or chemotherapeutic waste burned, and the weight of all
other fuels and wastes burned in the unit.
(ii) Agricultural waste incineration units. Incineration
units burning 90 percent or more by weight (on a calendar
quarter basis and excluding the weight of auxiliary fuel and
combustion air) of agricultural wastes as defined in 40 CFR
60.2265 (in effect on January 30, 2001) are not subject to
this subpart if you meet the two requirements specified in
(c)(ii)(A) and (B) of this subsection.
(A) Notify the permitting authority that the unit meets
these criteria.
(B) Keep records on a calendar quarter basis of the
weight of agricultural waste burned, and the weight of all
other fuels and wastes burned in the unit.
(iii) Municipal waste combustion units. Incineration
units that meet either of the two criteria specified in
(c)(iii)(A) and (B) of this subsection.
(A) Units are regulated under 40 CFR Part 60, subpart Ea
or subpart Eb (in effect on July 1, 2010); Spokane County Air
Pollution Control Authority Regulation 1, Section 6.17 (in
effect on February 13, 1999); 40 CFR Part 60, subpart AAAA (in
effect on July 1, 2010); or WAC 173-400-050(5).
(B) Units burn greater than 30 percent municipal solid
waste or refuse-derived fuel, as defined in 40 CFR Part 60,
subparts Ea (in effect on July 1, 2010), Eb (in effect on July
1, 2010), and AAAA (in effect on July 1, 2010), and WAC 173-400-050(5), and that have the capacity to burn less than
35 tons (32 megagrams) per day of municipal solid waste or
refuse-derived fuel, if you meet the two requirements in
(c)(iii)(B)(I) and (II) of this subsection.
(I) Notify the permitting authority that the unit meets
these criteria.
(II) Keep records on a calendar quarter basis of the
weight of municipal solid waste burned, and the weight of all
other fuels and wastes burned in the unit.
(iv) Medical waste incineration units. Incineration
units regulated under 40 CFR Part 60, subpart Ec (Standards of
Performance for Hospital/Medical/Infectious Waste Incinerators
for Which Construction is Commenced After June 20, 1996) (in
effect on July 1, 2010);
(v) Small power production facilities. Units that meet
the three requirements specified in (c)(v)(A) through (C) of
this subsection.
(A) The unit qualifies as a small power-production
facility under section 3 (17)(C) of the Federal Power Act (16
U.S.C. 796 (17)(C)).
(B) The unit burns homogeneous waste (not including
refuse-derived fuel) to produce electricity.
(C) You notify the permitting authority that the unit
meets all of these criteria.
(vi) Cogeneration facilities. Units that meet the three
requirements specified in (c)(vi)(A) through (C) of this
subsection.
(A) The unit qualifies as a cogeneration facility under
section 3 (18)(B) of the Federal Power Act (16 U.S.C. 796
(18)(B)).
(B) The unit burns homogeneous waste (not including
refuse-derived fuel) to produce electricity and steam or other
forms of energy used for industrial, commercial, heating, or
cooling purposes.
(C) You notify the permitting authority that the unit
meets all of these criteria.
(vii) Hazardous waste combustion units. Units that meet
either of the two criteria specified in (c)(vii)(A) or (B) of
this subsection.
(A) Units for which you are required to get a permit
under section 3005 of the Solid Waste Disposal Act.
(B) Units regulated under subpart EEE of 40 CFR Part 63
(National Emission Standards for Hazardous Air Pollutants from
Hazardous Waste Combustors) (in effect on July 1, 2010).
(viii) Materials recovery units. Units that combust
waste for the primary purpose of recovering metals, such as
primary and secondary smelters;
(ix) Air curtain incinerators. Air curtain incinerators
that burn only the materials listed in (c)(ix)(A) through (C)
of this subsection are only required to meet the requirements
under "Air Curtain Incinerators" in 40 CFR 60.2245 through
60.2260 (in effect on July 1, 2010).
(A) 100 percent wood waste.
(B) 100 percent clean lumber.
(C) 100 percent mixture of only wood waste, clean lumber,
and/or yard waste.
(x) Cyclonic barrel burners. See 40 CFR 60.2265 (in
effect on July 1, 2010).
(xi) Rack, part, and drum reclamation units. See 40 CFR
60.2265 (in effect on July 1, 2010).
(xii) Cement kilns. Kilns regulated under subpart LLL of
40 CFR Part 63 (National Emission Standards for Hazardous Air
Pollutants from the Portland Cement Manufacturing Industry)
(in effect on July 1, 2010).
(xiii) Sewage sludge incinerators. Incineration units
regulated under 40 CFR Part 60, (Standards of Performance for
Sewage Treatment Plants) (in effect on July 1, 2010).
(xiv) Chemical recovery units. Combustion units burning
materials to recover chemical constituents or to produce
chemical compounds where there is an existing commercial
market for such recovered chemical constituents or compounds. The seven types of units described in (c)(xiv)(A) through (G)
of this subsection are considered chemical recovery units.
(A) Units burning only pulping liquors (i.e., black
liquor) that are reclaimed in a pulping liquor recovery
process and reused in the pulping process.
(B) Units burning only spent sulfuric acid used to
produce virgin sulfuric acid.
(C) Units burning only wood or coal feedstock for the
production of charcoal.
(D) Units burning only manufacturing by-product
streams/residues containing catalyst metals which are
reclaimed and reused as catalysts or used to produce
commercial grade catalysts.
(E) Units burning only coke to produce purified carbon
monoxide that is used as an intermediate in the production of
other chemical compounds.
(F) Units burning only hydrocarbon liquids or solids to
produce hydrogen, carbon monoxide, synthesis gas, or other
gases for use in other manufacturing processes.
(G) Units burning only photographic film to recover
silver.
(xv) Laboratory analysis units. Units that burn samples
of materials for the purpose of chemical or physical analysis.
(d) Exceptions.
(i) Physical or operational changes to a CISWI unit made
primarily to comply with this section do not qualify as a
"modification" or "reconstruction" (as defined in 40 CFR
60.2815, in effect on July 1, 2010).
(ii) Changes to a CISWI unit made on or after June 1,
2001, that meet the definition of "modification" or
"reconstruction" as defined in 40 CFR 60.2815 (in effect on
July 1, 2010) mean the CISWI unit is considered a new unit and
subject to WAC 173-400-115, which adopts 40 CFR Part 60,
subpart CCCC by reference.
(e) A CISWI unit must comply with 40 CFR 60.2575 through
60.2875, in effect on July 1, 2010, which is adopted by
reference. The federal rule contains these major components:
• Increments of progress towards compliance in 60.2575
through 60.2630;
• Waste management plan requirements in 60.2620 through
60.2630;
• Operator training and qualification requirements in
60.2635 through 60.2665;
• Emission limitations and operating limits in 60.2670
through 60.2685;
• Performance testing requirements in 60.2690 through
60.2725;
• Initial compliance requirements in 60.2700 through
60.2725;
• Continuous compliance requirements in 60.2710 through
60.2725;
• Monitoring requirements in 60.2730 through 60.2735;
• Recordkeeping and reporting requirements in 60.2740
through 60.2800;
• Title V operating permits requirements in 60.2805;
• Air curtain incinerator requirements in 60.2810 through
60.2870;
• Definitions in 60.2875; and
• Tables in 60.2875. In Table 1, the final control plan
must be submitted before June 1, 2004, and final compliance
must be achieved by June 1, 2005.
(i) Exception to adopting the federal rule. For purposes
of this section, "administrator" includes the permitting
authority.
(ii) Exception to adopting the federal rule. For
purposes of this section, "you" means the owner or operator.
(iii) Exception to adopting the federal rule. For
purposes of this section, each reference to "the effective
date of state plan approval" means July 1, 2002.
(iv) Exception to adopting the federal rule. The Title V
operating permit requirements in 40 CFR 2805(a) are not
adopted by reference. Each CISWI unit, regardless of whether
it is a major or nonmajor unit, is subject to the air
operating permit regulation, chapter 173-401 WAC, beginning on
July 1, 2002. See WAC 173-401-500 for the permit application
requirements and deadlines.
(v) Exception to adopting the federal rule. The
following compliance dates apply:
(A) The final control plan (Increment 1) must be
submitted no later than July 1, 2003. (See Increment 1 in
Table 1.)
(B) Final compliance (Increment 2) must be achieved no
later than July 1, 2005. (See Increment 2 in Table 1.)
(5) Small municipal waste combustion units constructed on
or before August 30, 1999.
(a) Definition. "Municipal waste combustion unit" means
any setting or equipment that combusts, liquid, or gasified
municipal solid waste including, but not limited to,
field-erected combustion units (with or without heat
recovery), modular combustion units (starved air- or
excess-air), boilers (for example, steam generating units),
furnaces (whether suspension-fired, grate-fired, mass-fired,
air-curtain incinerators, or fluidized bed-fired), and
pyrolysis/combustion units. Two criteria further define
municipal waste combustion units:
(i) Municipal waste combustion units do not include the
following units:
(A) Pyrolysis or combustion units located at a plastics
or rubber recycling unit as specified under the exemptions in
this subsection (5)(c)(viii) and (ix).
(B) Cement kilns that combust municipal solid waste as
specified under the exemptions in this subsection (5)(c)(x).
(C) Internal combustion engines, gas turbines, or other
combustion devices that combust landfill gases collected by
landfill gas collection systems.
(ii) The boundaries of a municipal waste combustion unit
are defined as follows. The municipal waste combustion unit
includes, but is not limited to, the municipal solid waste
fuel feed system, grate system, flue gas system, bottom ash
system, and the combustion unit water system. The municipal
waste combustion unit does not include air pollution control
equipment, the stack, water treatment equipment, or the
turbine-generator set. The municipal waste combustion unit
boundary starts at the municipal solid waste pit or hopper and
extends through three areas:
(A) The combustion unit flue gas system, which ends
immediately after the heat recovery equipment or, if there is
no heat recovery equipment, immediately after the combustion
chamber.
(B) The combustion unit bottom ash system, which ends at
the truck loading station or similar equipment that transfers
the ash to final disposal. It includes all ash handling
systems connected to the bottom ash handling system.
(C) The combustion unit water system, which starts at the
feed water pump and ends at the piping that exits the steam
drum or superheater.
(b) Applicability. This section applies to a municipal
waste combustion unit that meets these three criteria:
(i) The municipal waste combustion unit has the capacity
to combust at least 35 tons per day of municipal solid waste
but no more than 250 tons per day of municipal solid waste or
refuse-derived fuel.
(ii) The municipal waste combustion unit commenced
construction on or before August 30, 1999.
(iii) The municipal waste combustion unit is not exempt
under (c) of this section.
(c) Exempted units. The following municipal waste
combustion units are exempt from the requirements of this
section:
(i) Small municipal waste combustion units that combust
less than 11 tons per day. Units are exempt from this section
if four requirements are met:
(A) The municipal waste combustion unit is subject to a
federally enforceable order or order of approval limiting the
amount of municipal solid waste combusted to less than 11 tons
per day.
(B) The owner or operator notifies the permitting
authority that the unit qualifies for the exemption.
(C) The owner or operator of the unit sends a copy of the
federally enforceable order or order of approval to the
permitting authority.
(D) The owner or operator of the unit keeps daily records
of the amount of municipal solid waste combusted.
(ii) Small power production units. Units are exempt from
this section if four requirements are met:
(A) The unit qualifies as a small power production
facility under section 3 (17)(C) of the Federal Power Act (16
U.S.C. 796 (17)(C)).
(B) The unit combusts homogeneous waste (excluding
refuse-derived fuel) to produce electricity.
(C) The owner or operator notifies the permitting
authority that the unit qualifies for the exemption.
(D) The owner or operator submits documentation to the
permitting authority that the unit qualifies for the
exemption.
(iii) Cogeneration units. Units are exempt from this
section if four requirements are met:
(A) The unit qualifies as a small power production
facility under section 3 (18)(C) of the Federal Power Act (16
U.S.C. 796 (18)(C)).
(B) The unit combusts homogeneous waste (excluding
refuse-derived fuel) to produce electricity and steam or other
forms of energy used for industrial, commercial, heating, or
cooling purposes.
(C) The owner or operator notifies the permitting
authority that the unit qualifies for the exemption.
(D) The owner or operator submits documentation to the
permitting authority that the unit qualifies for the
exemption.
(iv) Municipal waste combustion units that combust only
tires. Units are exempt from this section if three
requirements are met:
(A) The municipal waste combustion unit combusts a
single-item waste stream of tires and no other municipal waste
(the unit can cofire coal, fuel oil, natural gas, or other
nonmunicipal solid waste).
(B) The owner or operator notifies the permitting
authority that the unit qualifies for the exemption.
(C) The owner or operator submits documentation to the
permitting authority that the unit qualifies for the
exemption.
(v) Hazardous waste combustion units. Units are exempt
from this section if the units have received a permit under
section 3005 of the Solid Waste Disposal Act.
(vi) Materials recovery units. Units are exempt from
this section if the units combust waste mainly to recover
metals. Primary and secondary smelters may qualify for the
exemption.
(vii) Cofired units. Units are exempt from this section
if four requirements are met:
(A) The unit has a federally enforceable order or order
of approval limiting municipal solid waste combustion to no
more than 30 percent of total fuel input by weight.
(B) The owner or operator notifies the permitting
authority that the unit qualifies for the exemption.
(C) The owner or operator submits a copy of the federally
enforceable order or order of approval to the permitting
authority.
(D) The owner or operator records the weights, each
quarter, of municipal solid waste and of all other fuels
combusted.
(viii) Plastics/rubber recycling units. Units are exempt
from this section if four requirements are met:
(A) The pyrolysis/combustion unit is an integrated part
of a plastics/rubber recycling unit as defined in 40 CFR
60.1940 (in effect on July 1, 2010).
(B) The owner or operator of the unit records the weight,
each quarter, of plastics, rubber, and rubber tires processed.
(C) The owner or operator of the unit records the weight,
each quarter, of feed stocks produced and marketed from
chemical plants and petroleum refineries.
(D) The owner or operator of the unit keeps the name and
address of the purchaser of the feed stocks.
(ix) Units that combust fuels made from products of
plastics/rubber recycling plants. Units are exempt from this
section if two requirements are met:
(A) The unit combusts gasoline, diesel fuel, jet fuel,
fuel oils, residual oil, refinery gas, petroleum coke,
liquified petroleum gas, propane, or butane produced by
chemical plants or petroleum refineries that use feed stocks
produced by plastics/rubber recycling units.
(B) The unit does not combust any other municipal solid
waste.
(x) Cement kilns. Cement kilns that combust municipal
solid waste are exempt.
(xi) Air curtain incinerators. If an air curtain
incinerator as defined under 40 CFR 60.1910 (in effect on July
1, 2010) combusts 100 percent yard waste, then those units
must only meet the requirements under 40 CFR 60.1910 through
60.1930 (in effect on July 1, 2010).
(d) Exceptions.
(i) Physical or operational changes to an existing
municipal waste combustion unit made primarily to comply with
this section do not qualify as a modification or
reconstruction, as those terms are defined in 40 CFR 60.1940
(in effect on July 1, 2010).
(ii) Changes to an existing municipal waste combustion
unit made on or after June 6, 2001, that meet the definition
of modification or reconstruction, as those terms are defined
in 40 CFR 60.1940 (in effect on July 1, 2010), mean the unit
is considered a new unit and subject to WAC 173-400-115, which
adopts 40 CFR Part 60, subpart AAAA (in effect on July 1,
2010).
(e) Municipal waste combustion units are divided into two
subcategories based on the aggregate capacity of the municipal
waste combustion plant as follows:
(i) Class I units. Class I units are small municipal
waste combustion units that are located at municipal waste
combustion plants with an aggregate plant combustion capacity
greater than 250 tons per day of municipal solid waste. See
the definition of "municipal waste combustion plant capacity"
in 40 CFR 60.1940 (in effect on July 1, 2010) for the
specification of which units are included in the aggregate
capacity calculation.
(ii) Class II units. Class II units are small municipal
waste combustion units that are located at municipal waste
combustion plants with an aggregate plant combustion capacity
less than or equal to 250 tons per day of municipal solid
waste. See the definition of "municipal waste combustion
plant capacity" in 40 CFR 60.1940 (in effect on July 1, 2010)
for the specification of which units are included in the
aggregate capacity calculation.
(f) Compliance option 1.
(i) A municipal solid waste combustion unit may choose to
reduce, by the final compliance date of June 1, 2005, the
maximum combustion capacity of the unit to less than 35 tons
per day of municipal solid waste. The owner or operator must
submit a final control plan and the notifications of
achievement of increments of progress as specified in 40 CFR
60.1610 (in effect on July 1, 2010).
(ii) The final control plan must, at a minimum, include
two items:
(A) A description of the physical changes that will be
made to accomplish the reduction.
(B) Calculations of the current maximum combustion
capacity and the planned maximum combustion capacity after the
reduction. Use the equations specified in 40 CFR 60.1935 (d)
and (e) (in effect on July 1, 2010) to calculate the
combustion capacity of a municipal waste combustion unit.
(iii) An order or order of approval containing a
restriction or a change in the method of operation does not
qualify as a reduction in capacity. Use the equations
specified in 40 CFR 60.1935 (d) and (e) (in effect on July 1,
2010) to calculate the combustion capacity of a municipal
waste combustion unit.
(g) Compliance option 2. The municipal waste combustion
unit must comply with 40 CFR 60.1585 through 60.1905, and
60.1935 (in effect on July 1, 2010), which is adopted by
reference.
(i) The rule contains these major components:
(A) Increments of progress towards compliance in 60.1585
through 60.1640;
(B) Good combustion practices - operator training in
60.1645 through 60.1670;
(C) Good combustion practices - operator certification in
60.1675 through 60.1685;
(D) Good combustion practices - operating requirements in
60.1690 through 60.1695;
(E) Emission limits in 60.1700 through 60.1710;
(F) Continuous emission monitoring in 60.1715 through
60.1770;
(G) Stack testing in 60.1775 through 60.1800;
(H) Other monitoring requirements in 60.1805 through
60.1825;
(I) Recordkeeping reporting in 60.1830 through 60.1855;
(J) Reporting in 60.1860 through 60.1905;
(K) Equations in 60.1935;
(L) Tables 2 through 8.
(ii) Exception to adopting the federal rule. For
purposes of this section, each reference to the following is
amended in the following manner:
(A) "State plan" in the federal rule means WAC 173-400-050(5).
(B) "You" in the federal rule means the owner or
operator.
(C) "Administrator" includes the permitting authority.
(D) "The effective date of the state plan approval" in
the federal rule means December 6, 2002.
(h) Compliance schedule.
(i) Small municipal waste combustion units must achieve
final compliance or cease operation not later than December 1,
2005.
(ii) Small municipal waste combustion units must achieve
compliance by May 6, 2005 for all Class II units, and by
November 6, 2005 for all Class I units.
(iii) Class I units must comply with these additional
requirements:
(A) The owner or operator must submit the dioxins/furans
stack test results for at least one test conducted during or
after 1990. The stack test must have been conducted according
to the procedures specified under 40 CFR 60.1790 (in effect on
July 1, 2010).
(B) Class I units that commenced construction after June
26, 1987, must comply with the dioxins/furans and mercury
limits specified in Tables 2 and 3 in 40 CFR Part 60, subpart
BBBB (in effect on February 5, 2001) by the later of two
dates:
(I) December 6, 2003; or
(II) One year following the issuance of an order of
approval (revised construction approval or operation permit)
if an order or order of approval or operation modification is
required.
(i) Air operating permit. Applicability to chapter 173-401 WAC, the air operating permit regulation, begins on
July 1, 2002. See WAC 173-401-500 for the permit application
requirements and deadlines.
[Statutory Authority: Chapter 70.94 RCW. 11-06-060 (Order
09-01), § 173-400-050, filed 3/1/11, effective 4/1/11. Statutory Authority: RCW 70.94.152. 05-03-033 (Order 03-07),
§ 173-400-050, filed 1/10/05, effective 2/10/05. Statutory
Authority: Chapter 70.94 RCW, RCW 70.94.141, [70.94.]152,[70.94.]331
, [70.94.]510 and 43.21A.080. 01-17-062 (Order
99-06), § 173-400-050, filed 8/15/01, effective 9/15/01. Statutory Authority: Chapter 70.94 RCW. 91-05-064 (Order
90-06), § 173-400-050, filed 2/19/91, effective 3/22/91. Statutory Authority: Chapters 43.21A and 70.94 RCW. 83-09-036 (Order DE 83-13), § 173-400-050, filed 4/15/83. Statutory Authority: RCW 70.94.331. 80-11-059 (Order DE
80-14), § 173-400-050, filed 8/20/80. Statutory Authority:
RCW 43.21A.080 and 70.94.331. 79-06-012 (Order DE 78-21), §
173-400-050, filed 5/8/79; Order DE 76-38, § 173-400-050,
filed 12/21/76. Formerly WAC 18-04-050.]