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traffic on Interstate Highway 5, Charter Way, and occasional vehicles on Eighth Street and Fresno Avenue. Distant, low-level noise emissions also originate from the two schools and residences east of the site. Generally, the site may be considered a relatively quiet area with ambient noise levels averaging close to 40 dBA during the day and less at night. The current policy of the City of Stockton is to apply State Noise Insulation Standards to all new attached residential dwellings. These standards require all new attached residential , building within the 60 dBA, CNEL (or Ldn) contour to undergo an acoustic analysis which shows whether the proposed building has been designed to limit intruding interior noise to no more than 45 dBA, CNEL (or Ldn). Similarly, the City's policy requires State Noise Insulation Standards to be applied to new single-family detached homes within the 65 dBA, CNEL (or Ldn) [16]'. The State Office of Noise Control "Land Use Compatibility Chart for Community Noise Environments" [15, p.30], describes noise levels according to residential use suitability as follows (see Appendix E, P. E-4). ° Up to 60 dBA, CNEL (or Ldn) is acceptable for residential uses with buildings of conventional construction. ° 55-70 dBA, CNEL (or Ldn) is conditionally acceptable for residential uses if minor sound reduction measures are incorporated into the building or site design. ° 70-75 dBA, CNEL (or Ldn) is normally unacceptable for residential• uses unless moderate to major sound reduction features are undertaken. 75 or greater dBA, CNEL (or Ldn) is clearly unacceptable for residential uses. IMPACTS: The SNAP 1.1 traffic noise prediction computer program which was developed by the Federal Highway Administration was used to model the project area. Runs were made to predict noise levels near the intersection of Eighth Street and Fresno Avenue under existing conditions, with full build-out of census tracts 24 and 25, and with full build-out of census tracts 24 and 25 plus the project. The intersection of Eighth Street and Fresno Avenue was selected for analysis because it would be the area most strongly affected by the project with respect to traffic noise. The table on page 48 presents the results of the SNAP 1.1 noise predictions and page 49 shows the locations of hypothetical noise receiver sites used in the computer model . Receiver sites were located in areas which would be most severely impacted by traffic noise. No sites were located within the interior of the project because the future 46