MINOR CHANGE - Attachment 5 - Noise Impact Assessment.pdf

                                                   Figure 4.1: Graph of Noise Logging Results at Location A


                                                                        Noise Monitoring at Location A
                                                            (Monday 14:15 24/08/2020 to Wednesday 12:15 02/09/2020)
                              70



                              60



                              50
  Sound Pressure Level, dBA




                              40



                              30



                              20



                              10
                                                                                                                                            L10
                                                                                                                                            Leq
                                                                                                                                            L90
                               0
                              12:00 AM   3:00 AM         6:00 AM       9:00 AM        12:00 PM      3:00 PM     6:00 PM           9:00 PM         12:00 AM

                                                                                       Time



From the noise logging the statistical results have been summarised in Table 4.2.

Table 4.2: Statistical Noise Levels at Location A

                                                        Noise Levels dBA
 Parameter                                              [Maximum-Top 10%-(Average)-Bottom 10%-Minimum]
                                                        Day                              Evening                          Night
 Lmax                                                   85, 74, (67), 60, 53             82, 74, (59), 47, 39             75, 66, (51), 41, 35
 L1                                                     70, 63, (57), 51, 48             69, 62, (51), 42, 34             68, 59, (44), 35, 31
 L10                                                    62, 56, (51), 45, 42             59, 55, (44), 37, 33             57, 50, (39), 31, 29
 Leq                                                    58, 53, (48), 43, 39             57, 52, (42), 35, 32             55, 48, (37), 30, 28
 L90                                                    49, 44, (40), 36, 32             46, 41, (36), 31, 30             45, 39, (33), 28, 27

The background noise levels were relatively free of insect noise and were calculated using the lowest 10 th
percentile method. The background noise levels are shown in Table 4.3.

Table 4.3: Background Noise Levels at Location A

 Period                                                                          Rating Background Noise Level (RBL) L90 dBA
 Day (7am to 6pm)                                                                36
 Evening (6pm to 10pm)                                                           31
 Night (10pm to 7am)                                                             28

From the results above the it is considered that road traffic and birds are the dominant noise sources at this
location.




207401.0104.R01V06                                                                                                                                Page 5