Cal. Code Regs. tit. 22 § 66265.711
The owner or operator of a regulated unit that contains hazardous waste, or discarded hazardous material, that contains a volatile toxic substance, or a hazardous material that can become airborne, or that can decompose or react to form a volatile toxic substance or toxic gas, shall provide for representative sampling and analysis of air upwind and at the disposal area and of air in the vapor space at vapor and gas monitoring wells, established by the owner or operator to the satisfaction of the Department. Such monitoring shall be conducted throughout the active life and the post-closure care period of the facility. Vapor and gas monitoring wells shall be covered with collection chambers. The owner or operator shall provide inside the collection chambers probes or equivalent methodologies that actively sense the concentration of substances specified pursuant to section 66265.712(b). If necessary to protect human health or the environment, the owner or operator shall provide instrumentation that provides continuous recording of concentrations of substances in open air and in atmosphere at vapor wells.
Cal. Code Regs. Tit. 22, § 66265.711
Note: Authority cited: Sections 208 and 25150, Health and Safety Code. Reference: Sections 25150(a), 25159, 25159.5 and 25245, Health and Safety Code.