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
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. |
[Statutory Authority: Chapter 90.76 RCW. 90-24-017, § 173-360-360, filed 11/28/90, effective 12/29/90.]