Environmental Statement volume 4 - Chiltern Evergreen3

Table D2.5 Unattended Night-Time Measurements at Oddington Crossing Station House (NML 8)Date Time DurationNoise Level (free-field), dBWeather(minutes)L Aeq,1h LAmax,1h (fast) Wind Speed Wind Direction Weather (a)(m/s)25.08.09 22.50 60 37 48 4.6 s Overcast25.08.09 23.50 60 37 57 3.6 s No data26.08.09 00.50 60 34 44 4.1 s No data26.08.09 01.50 60 34 46 4.1 s No data26.08.09 02.50 60 33 62 4.6 s No data27.08.09 04.00 60 39 49 2.1 sw Overcast27.08.09 05.00 60 44 67 1.5 sw No data27.08.09 (b) 06.00 58 47 68 2.1 s Mostly Cloudy(a) Weather data has been used from the nearby Met Office weather station at Benson. Where rain has been recorded, the noise data has been discarded. Where ‘No data’ has been recorded, data has been used only where local forecastsindicated no rain had occurred. Where wind speed in excess of 5 m/s was recorded, the noise data have been disregarded.(b) Three 30 second measurements within this one hour measurement were dominated by the two passenger train movements during this hour. These measurements have been removed so that the measurement is dominated by trafficnoise.Table D2.6 Unattended Measurement Survey Results at William Lucy Way (NML 19)Date Time DurationNoise Level (Corrected free-field), dBWeather(hours)L Aeq,1h L max,1h (fast) L A10,1h L A90,1h Wind Speed Wind Weather(m/s) Direction2009/09/09 23:00:30 1 57 82 58 41 2.1 n Clear2009/09/10 23:00:54 1 56 77 58 38 2.6 n Clear2009/09/09 00:00:07 1 54 77 51 38 3.6 n No data2009/09/10 00:00:31 1 55 70 59 42 1.0 nw No data2009/09/11 00:00:55 1 50 67 55 38 2.1 n No data2009/09/09 01:00:08 1 55 82 50 40 2.1 nw No data2009/09/10 01:00:32 1 55 80 42 37 1.0 nw No data2009/09/11 01:00:56 1 58 81 55 43 1.5 n No data2009/09/09 02:00:09 1 60 76 62 45 2.6 nw No data2009/09/10 02:00:33 1 48 68 50 39 1.0 ne No data2009/09/11 02:00:57 1 54 73 58 41 1.5 n No data2009/09/09 03:00:10 1 60 79 63 35 1.5 n No data2009/09/10 03:00:34 1 56 79 51 38 1.0 n No data2009/09/11 03:00:58 1 57 81 54 32 2.6 n No data