WAC 173-360-360
Reporting of suspected releases. Owners
and operators of UST systems shall report to the department or
delegated agency within twenty-four hours, or another
reasonable time period specified by the department or
delegated agency, and follow the procedures in WAC 173-360-370
when any of the following conditions apply:
(1) Owners and operators or others discover released
regulated substances at the UST site or in the surrounding
area (including but not limited to the presence of free
product or its constituents in soils, basements, sewer and
utility lines, groundwater, and/or surface water).
(2) Unusual operating conditions are observed by owners
and operators (such as the erratic behavior of product
dispensing equipment, the sudden loss of a regulated substance
from the UST system, or an unexplained presence of water in
the tank), unless system equipment is found to be defective
but not leaking, and is immediately repaired or replaced; or
(3) Monitoring results from a release detection method
required under WAC 173-360-335 and 173-360-340 indicate that a
release may have occurred unless:
(a) A false alarm is confirmed;
(b) The monitoring device is found to be defective, and
is immediately repaired, recalibrated or replaced, and
additional monitoring does not confirm the initial result; or
(c) In the case of inventory control, a second month of
data does not confirm the initial result, except that owners
and operators shall immediately investigate all
larger-than-normal or reoccurring variations in inventory
control results, and report such variations if they are
unaccounted for, without waiting to obtain a second month of
data.
Note:
Other federal, state, and local laws also require reporting, and in some cases investigation, of suspected releases.