Defense Claim #8 - The City and County of San Francisco (CCSF) is in full compliance with state noise regulation.
What the law says:
"The California Airport Noise Standards states that the basis for the acceptable level of aircraft noise for persons living in the vicinity of airports is a CNEL of 65 decibels. It's the noise standard that defines the airport's noise contour and is recognized by the FAA as the federal standard."
People in Burlingame, Hillsborough, San Mateo, and most of Millbrae do not live in the airport's noise contour.
Below is what a “CNEL” measurement would look like. Each of these 3 days would show a noise equivalent of 65 A-weighted decibels, an acceptable level in the airport’s view.
If 100 aircraft a day flew to/from SFO, it would satisfy the California Airport Noise Standards.
As of December 31, 2018, airport operations averaged 1287 a day, more than 10 times what is acceptable to the California Airport Noise Standards.
California Code of Regulations § 5012. Airport Noise Standard.
The standard for the acceptable level of aircraft noise for persons living in the vicinity of airports is hereby established to be a community noise equivalent level of 65 decibels. This standard forms the basis for the following limitation. No airport proprietor of a noise problem airport shall operate an airport with a noise impact area based on the standard of 65 dB CNEL unless the operator has applied for or received a variance as prescribed in Article 5 of this subchapter.