Current through Register Vol. 24-06, March 15, 2024
(1) The following
new and existing Class V UIC wells automatically meet the nonendangerment
standard and are considered rule authorized after the well is registered. These
Class V wells are not subject to the requirements of WAC
173-218-090:
(a) UIC wells which inject fluids that meet
chapter 173-200 WAC, Water quality standards for groundwaters of the state of
Washington, to control subsidence;
(b) UIC wells that temporarily inject fluids
or other material for the purpose of maintaining a properly functioning water
extraction well or dewatering well;
(c) Closed loop heating and cooling water
return flow wells that have not added any chemicals or product to the
water;
(d) Air conditioning or heat
pump return flow wells that have not added any chemical or product to the
water, and are used to return fluid to the supply aquifer. The fluids must not
impair beneficial uses of groundwater or surface water;
(e) Aquifer recharge wells that meet the
requirements in chapter 173-157 WAC Underground artificial storage and
recovery;
(f) UIC wells used as
part of a reclaimed water project that meet the requirements of the Water
reclamation and reuse standards as authorized by
RCW
90.46.042;
(g) Septic systems that serve twenty or more
people per day or an equivalent design capacity of 3,500 gallons or larger per
day; and
(i) Receive operating permits, meet
the requirements and are permitted in accordance with chapter 246-272B WAC
Large on-site sewage system regulations; or
(ii) Meet the requirements of chapter
246-272A WAC On-site sewage systems.
(h) UIC wells receiving storm water from
nonpollution generating surfaces; and
(i) UIC wells that only receive runoff from a
roof coated with an inert, nonleachable material and a roof that is not subject
to venting of manufacturing, commercial, or other indoor pollutants.
(2) The following Class V UIC
wells automatically meet the nonendangerment standard, are considered rule
authorized and are exempt from registering:
(a) UIC wells used in residential settings
that receive water from sump pumps, for basement flood control; and
(b) UIC wells that only receive runoff from a
residential roof.
Statutory Authority:
Chapters
43.21A and
90.48 RCW. 06-02-065 (Order 01-10),
§ 173-218-100, filed 1/3/06, effective 2/3/06. Statutory Authority:
RCW
43.21A.445. 84-06-023 (Order DE 84-02),
§ 173-218-100, filed 2/29/84.