California Code, Health and Safety Code - HSC § 42705.6

(1) “Refinery-related community air monitoring system” means equipment that measures and records air pollutant concentrations in the ambient air at or near sensitive receptor locations near a petroleum refinery and that may be useful for estimating associated pollutant exposures and health risks and in determining trends in air pollutant levels over time.

(2) “Fence-line monitoring system” means equipment that measures and records air pollutant concentrations at or adjacent to a petroleum refinery and that may be useful for detecting or estimating the quantity of fugitive emissions, gas leaks, and other air emissions from the refinery.

(1) A district shall design, develop, install, operate, and maintain the refinery-related community air monitoring system, which shall be operated and maintained in accordance with guidance from the appropriate district. A district may contract with a third party to implement this paragraph.

(2) The refinery-related community air monitoring system shall include equipment capable of measuring compounds emitted to the atmosphere from refinery processes, as determined by the appropriate district.

(f)(1) Except as provided in paragraph (2), the owner or operator of a petroleum refinery shall be responsible for the costs associated with implementing this section.

(2) To the extent a refinery-related community air monitoring system is intentionally utilized by a district to monitor emissions from sources under its jurisdiction other than a petroleum refinery, the district shall ensure the costs of the system are shared in a reasonably equitable manner.