Section 20931 - CIWMB - Structure Monitoring (California Code of Regulations)

§ 20931. CIWMB - Structure Monitoring

(a) To ensure that the requirements of § 20923(a)(1) are met, the monitoring network design shall include provisions for monitoring all structures within the disposal site permitted facility boundary, including but not limited to, buildings, subsurface vaults, utilities, or any other areas where potential landfill gas buildup may cause adverse impacts to the public health or safety or the environment.

(b) Methods for monitoring on-site structures may include, but are not limited to: periodic monitoring, utilizing either permanently installed monitoring probes or gas surveys, and continuous monitoring systems.

(c) Structures located on top of the waste disposal footprint shall be monitored on a continuous basis.

(d) When practical, structures shall be monitored after they have been closed overnight or for the weekend to allow for an accurate assessment of gas accumulation. Areas of the structure where gas may accumulate shall be monitored and may include, but are not limited to, areas in, under, beneath and around basements; crawl spaces; floor seams or cracks; and subsurface utility connections.

(1. New section filed 6-18-97; operative 7-18-97 (Register 97, No. 25). 2. Amendment of section heading, section and Note filed 8-21-2007; operative 9-20-2007 (Register 2007, No. 34).)

Note: Authority cited: Sections 40502 and 45020, Public Resources Code. Reference: Sections 43021 and 43103, Public Resources Code.

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