In order to aid the state in identifying and addressing heating oil contaminated property, this chapter sets forth the requirements for the public to report a release of heating oil from a heating oil tank and the process for the agency to conduct an initial investigation of the release. This chapter is promulgated under the authority of chapter 70A.330 RCW.

(1) Nothing in this chapter precludes the department of ecology from taking or requiring further action based on other law.

(2) This chapter does not apply to releases from underground storage tank systems regulated under chapter 173-360A WAC. Such releases must be investigated and reported to the department of ecology in accordance with that chapter.

(3) Nothing in this chapter eliminates any obligations to comply with reporting requirements in other laws or permits.

Unless the context requires otherwise, the definitions in this section shall apply throughout this chapter.

(1) "Agency" means the Washington state pollution liability insurance agency.

(2) "Heating oil" means any petroleum product used for space heating in oil-fired furnaces, heaters, and boilers, including stove oil, diesel fuel, or kerosene. "Heating oil" does not include petroleum products used as fuels in motor vehicles, marine vessels, trains, buses, aircraft, or any off-highway equipment not used for space heating, or the generation of electrical energy.

(3) "Heating oil tank" means a tank and its connecting pipes, whether above or below ground, or in a basement, with pipes connected to the tank for space heating of human living or working space on the premises where the tank is located. "Heating oil tank" includes a decommissioned or abandoned heating oil tank. "Heating oil tank" does not include a tank used solely for industrial process heating purposes or generation of electrical energy.

(4) "MTCA" means the Model Toxics Control Act, chapter 70A.305 RCW and its implementing regulations, chapters 173-340 and 173-204 WAC.

(5) "Operator" means any person in control of, or having responsibility for, the daily operation of a heating oil tank.

(6) "Owner" means the person, or his or her authorized representative, legally responsible for a heating oil tank, its contents, and the premises upon which the heating oil tank is located.

(7) "Release" means any intentional or unintentional entry of any hazardous substance into the environment including, but not limited to, a spill, leak, emission, escape, or leaching into the environment.

(8) "Remedial action" has the same meaning as defined in RCW 70A.305.020.

(1) Any owner or operator of a heating oil tank, or owner of the property where a heating oil tank is located, who has information or suspects that heating oil has been released to the environment at the property and may be a threat to human health or the environment must report such information to the agency within 90 days of discovery.

(2) To the extent known, the report to the agency must include:

(a) The identification and address of the release;

(b) Circumstances of the release and the discovery; and

(3) The following are examples of situations that a person should generally report under this section:

(a) Discovery of heating oil that has leaked or been dumped on the ground.

(b) Contamination in a water supply well.

(d) Vapors in a building, utility vault, or other structure that appear to be entering the structure from nearby contaminated soil or ground water.

(e) Free product on the surface of the ground or in the ground water.

(f) Any contaminated soil or unpermitted disposal of heating oil that would be classified as a hazardous waste under federal or state law.

(4) There is no requirement to report a release to the agency under this chapter if:

(a) The circumstances associated with the release have been provided to the agency through a notice of potential claim under chapter 374-70 WAC, a technical assistance program application under chapter 374-80 WAC, or application to the underground storage tank revolving loan and grant program; or

(b) The release has been reported to department of ecology in accordance with another law or regulation.

(1) An initial investigation is a review of a reported heating oil tank release by the agency and documentation of reported conditions. The purpose of the initial investigation is to determine:

(a) Whether there has been a release from a heating oil tank that may pose a threat to human health or the environment;

(b) Whether further remedial action is necessary to confirm the release or to address the threat posed by the release under MTCA to protect human health and the environment;

(c) Whether emergency remedial action is necessary to confirm the release or to address the threat posed by the release; and

(d) Whether referral to another authority is appropriate.

(2) The agency will complete an initial investigation unless:

(a) The circumstances associated with the suspected or confirmed release are known to the agency and have previously been, or are currently being, evaluated by the agency or other government agency; or

(b) The agency does not have a reasonable basis to believe that there has been a release or threatened release of a hazardous substance that may pose a threat to human health or the environment.

(3) The agency will complete an initial investigation within 90 days of a release being reported to the agency.

(4) The agency may rely on another government agency or a contractor to the agency to conduct an initial investigation on its behalf, provided the agency determines:

(a) The other agency or contractor is not suspected to have contributed to the release of heating oil; and

(b) The other agency or contractor has no conflict of interest.

(5) Within 30 days of completing an initial investigation of a release, the agency will conduct additional investigation or make one of the following determinations:

(a) No release of heating oil occurred.

(b) A release of heating oil occurred but does not pose a threat to human health or the environment requiring remedial action under MTCA.

(c) A release of heating oil occurred that posed a threat to human health or the environment, a remedial action to address the threat has been completed, and no further remedial action is necessary to address the threat.

(d) A release of heating oil occurred that poses a threat to human health or the environment and further remedial action other than emergency remedial action is necessary to address the threat. The agency will notify the owner and operator and the department of ecology of the agency's determination.

(e) A release of heating oil occurred that poses a threat to human health or the environment and an emergency remedial action is necessary to address the threat. The agency will notify the owner and operator and the department of ecology of the agency's determination.