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ABOUT THE MAP. This map shows the current exterior levels of noise created by cars, trucks, or trains traveling along roadways and rail lines <br />in the city. The City's noise and land use compatibility standards (see Table N-1) consider exterior levels above 65 decibels (d BA CNEL) to be <br />generally incompatible for residential and other noise -sensitive land uses. <br />GARDEN GROVE <br />FOUNTAIN VALLEY <br />Existing Noise Contours <br />_ 70+ dBA CNEL <br />® 65dBACNEL <br />60 dBA CNEL <br />COSTA MESA <br />IZ.Jnmes <br />a os t <br />Source: Place mks 2020M PWBW,1:971012020 <br />""' Railway Community Noise Equivalent Level (CNEU: The energy -average of the sound levels <br />during a 24-hour penod, with 5 decibels (dB) added to the levels from 7:00 pm to 10:00 <br />pm and 10 d6 added Liam 10:00 pm to 7:00 am. The decibels are measured in terms of <br />relatives loudness as pemeived by the human ear, refermd to as A -weighted decibels (dBA). <br />FIGURE N-1 <br />EXISTING NOISE CONTOURS CITY OF SANTA ANA GENERAL PLAN Ni ee ,N„,• <br />