“dB(A)” or “dBA” means the sound level in decibels as measured on a sound level meter using the A-weighting network.

“Emergency work” means any work performed for the purpose of preventing or alleviating the physical trauma or property damage threatened or caused by an emergency.

“Mine” means and includes quarries and means any surface excavation or underground excavation for the extraction of ores, minerals, rock, sand and gravel of all types.

“Minerals” means solid homogenous crystalline chemical elements or compounds that result from the inorganic processes of nature, coal, oil, shale and any other hydrocarbon-bearing substances, as well as rocks, sand and gravel.

“Production facilities” means all equipment used for the purpose of producing or transporting minerals within or through the city, excluding normal public utility gas lines.

“Sound level meter” means an instrument meeting or exceeding American National Standards Institute’s Standard S1.4-1971 for Type 2 sound level meters or an instrument and the associated recording and analyzing equipment which will provide equivalent data. (Ord. 706 § 3 (Exh. A), 2019).