Washington Administrative Code
Title 173 - Ecology, Department of (See also Titles 197, 317, 372, and 508)
Chapter 173-306 - Special incinerator ash management standards
Section 173-306-350 - Incinerator ash siting standards for disposal facilities
Universal Citation: WA Admin Code 173-306-350
Current through Register Vol. 24-06, March 15, 2024
(1) Applicability. These standards apply to all new or expanded monofills. These standards do not apply to:
(a) Existing monofills or monofills that have
closed before the effective date of this chapter; or
(b) Treatment, utilization, or processing
facilities.
(2) Siting standards.
Owners or operators of all applicable disposal facilities shall, at the time of permit application, meet the following locational standards:
(a) Geology. No facility
may be located within two hundred feet, measured horizontally, from a fault
that has had displacement in holocene times. All faults within three thousand
feet of a facility must be identified and evaluated under WAC
173-306-330(1),
where existing geologic information is available or can be obtained with
reasonable effort. For sites for which fault information cannot reasonably be
obtained, a geologic hazard assessment performed by an experienced, qualified
geologist may be substituted for this siting criteria, if the study methods are
reviewed and approved by the department before the investigation.
(b) Groundwater.
(i) No facility may be located where the
depth from the lowest point of the bottom liner to the seasonal high water
level of the upper most aquifer of beneficial use is less than ten feet or one
hundred twenty days travel time hydraulically, whichever is greater.
(ii) No facility may be located over a sole
source aquifer.
(iii) No facility's
active area may be located closer than one thousand feet to the nearest
downgradient groundwater intake for domestic water in use and existing at the
time of permit application unless the owner or operator can show that the
active area is no less than one hundred twenty days travel time hydraulically
to the nearest downgradient groundwater intake for domestic water.
(c) Natural soils. No facility may
be located:
(i) Where known subsidence exists
within the facility boundary;
(ii)
In an area where unstable slopes may impact the active area of the
facility;
(iii) Where weak or
unstable soils exist within the proposed facility boundary, unless the
structural stability of the soils is mitigated through engineering practices.
(The following soils or conditions are defined as weak or unstable: Organic
soils, expansive soils, liquefaction sands, soft clays, sensitive clays, loess
and quick conditions.)
(d) Flooding. No facility's active area may
be located within the one hundred-year flood elevation as indicated in the most
current Federal Emergency Management Agency maps.
(e) Surface water. No facility's active area
may be located within five hundred feet, measured horizontally, of the ordinary
high water mark of any perennial surface water body.
(f) Sensitive areas. No facility may be
located:
(i) In an area that would result in
the taking of species or the direct elimination of critical habitat for federal
or state listed threatened or endangered species;
(ii) In a wetland as defined by the United
State Fish and Wildlife Service (Cowardin et al. 1979);
(iii) In a shoreline of the state under the
jurisdiction of the Shoreline Management Act;
(iv) In an area classified as a wilderness
area as defined by the Wilderness Act of 1964 ( P.L. 88-577 );
(v) In a state or federally designated
wildlife refuge or a game farm;
(vi) In an area with city, county, state, or
federal designation as a park or recreation area or any area provided for under
chapter 79.70 RCW, natural area preserves; and
(vii) In an area with city, county, state, or
federal designation as an archaeological or historic area or a national
monument.
(g) Land use.
No facility may be located so that its active area is closer than two hundred
feet to the facility property line. The active area may be no closer than one
thousand feet to the nearest housing unit in an existing residential
development. The one thousand-foot rule may be evaluated on a case-by-case
basis in rural areas and unincorporated towns.
(h) Climatic factors. No facility may be
located in an area that has a history of severe climatic factors without
engineered protection to mitigate those factors. Severe climatic factors,
include but are not limited to, high annual rainfall, extreme temperatures
(high or low), and high winds.
Statutory Authority: Chapter 70.138 RCW. 00-19-018 (Order 00-17), § 173-306-350, filed 9/8/00, effective 10/9/00; 90-10-047, § 173-306-350, filed 4/30/90, effective 5/31/90.
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.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.