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Pa e <br />No changes. <br />Pa e <br />Commissioner O'Connor inquired why Sunol Boulevard was eliminated in the first <br />paragraph. Ms. Stern replied that it was dropped in 2006 when Illingworth & Rodkin did <br />monitoring and found that the resurfacing had resulted in lower noise levels. <br />Pa e <br />No changes. <br />Pa eg 11_7 <br />Commissioner Olson asked what the source was for the noise contour for the airport. <br />Ms. Stern replied that it was taken from the City of Livermore General Plan. <br />The Commission then discussed Figure 11-3. <br />Pa e <br />No changes. <br />Pa e <br />Chair Blank noted in the first paragraph the statement that studies have shown that <br />aircraft noise is above 55 dBA. He inquired what these studies might be. Ms. Maxwell <br />stated that there have been a number of studies done over the years, one of which is the <br />General Health Effects of Transportation Noise done by the U.S. Department of <br />Transportation, which includes a chart. <br />Chair Blank stated that the reference should be incorporated in the study. Ms. Maxwell <br />noted that she is reluctant to incorporate it because there is some controversy about its <br />accuracy; however, it is safe to say that in general, aircraft noise is considered more <br />annoying than other noise sources at certain noise levels. <br />Chair Blank noted that he found this to be very controversial statement because there is <br />no scientific peer review that aircraft noise is more annoying that a loud lawn mower. He <br />expressed concern that the statement is without foundation. <br />Ms. Maxwell stated that the statement can be made clearer. She added that the noise is <br />not compared to lawn mowers but to trains and that there are slight differences. <br />PLANNING COMMISSION MINUTES, February 20, 2008 Page 14 of 18 <br />