Washington Administrative Code
Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508)
Chapter 173-304 - Minimum functional standards for solid waste handling
Section 173-304-420 - Piles used for storage and treatment - Facility standards
Universal Citation: WA Admin Code 173-304-420
Current through Register Vol. 24-06, March 15, 2024
(1) Applicability.
(a) This section is applicable to solid
wastes stored or treated in piles as defined in WAC
173-304-100 where putrescible
wastes (other than garbage) are in place for more than three weeks, other
wastes not intended for recycling are in place for more than three months, and
garbage is in place for more than three days. These standards are also
applicable to composting or storing of garbage and sludge in piles, and to tire
piles where more than eight hundred tires are stored at one facility.
(b) Other solid wastes stored or treated in
piles prior to waste recycling including compost piles of vegetative waste,
piles of woodwaste used for fuel or raw materials are subject to WAC
173-304-300.
(c) Waste piles stored in fully enclosed
buildings are not subject to these standards, provided that no liquids or
sludges with free liquids are added to the pile.
(d) Inert wastes and demolition wastes are
not subject to these standards.
(2) Requirements. All owners and operators shall:
(a) Comply with the requirements of the
General facility requirements, WAC
173-304-405;
(b) Design piles located in a one
hundred-year flood plain to:
(i) Comply with
local flood plain management ordinances and chapter 508-60 WAC, Administration
of flood control zones; and
(ii) To
avoid washout or restriction of flow; and
(c) Remove all solid wastes from the pile at
closure to another permitted facility.
(3) Requirements for putrescible wastes or wastes likely to produce leachate.
(a) Waste
piles shall be placed upon a surface such as sealed concrete, asphalt, clay or
an artificial liner underlying the pile, to prevent subsurface soil and
potential groundwater contamination and to allow collection of runoff and
leachate. The liner shall be designed of sufficient thickness and strength to
withstand stresses imposed by pile handling vehicles and the pile
itself;
(b) Runoff systems shall be
installed, designed and maintained to handle a twenty-four hour, twenty-five
year storm event;
(c) Waste piles
having a capacity of greater than ten thousand cubic yards shall have either:
(i) A groundwater monitoring system that
complies with WAC
173-304-490; or
(ii) A leachate detection, collection and
treatment system.
For purposes of this subsection, capacity refers to the total capacity of all putrescible or leachate-generating piles at one facility (i.e., two, five thousand cubic yard piles will subject the facility to the requirements of this subsection).
(d) Run-on prevention systems shall be
designed and maintained to handle the maximum flow from a twenty-five year
storm event; and
(e) A
jurisdictional health department may require that the entire base or liner
shall be inspected for wear and integrity and repaired or replaced by removing
stored wastes or otherwise providing inspection access to the base or liner;
the request shall be in writing and cite the reasons including valid
groundwater monitoring or leachate detection data leading the jurisdictional
health department to request such an inspection, repair or
replacement.
(4) Requirements for tire piles. Owners or operators shall:
(a) Control access to the tire pile by
fencing;
(b) Limit the tire pile to
a maximum of one-half acre in size;
(c) Limit the height of the tire pile to
twenty feet;
(d) Provide for a
thirty foot fire lane between tire piles; and
(e) Provide on-site fire control
equipment.
Statutory Authority: Chapter 43.21A RCW. 85-22-013 (Order 85-18), § 173-304-420, filed 10/28/85.
Disclaimer: These regulations may not be the most recent version. Washington may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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