| Appendix 4.13 | |||||||
| Predicted Noise Levels from Sewer Construction (With the Use of Quiet PME and Restriction on Number of Plant Operating) | |||||||
| Sensitive receiver | Distance from Construction Activities, m | Breaking up pavement, dB(A) | Excavation of trench, dB(A) | Installation of pipes and bedding, dB(A) | Backfilling, dB(A) | Reinstating road surface, dB(A) | |
| SWL | 103.0 | 108.6 | 100.8 | 105.0 | 102.4 | ||
| CMV1 | 3 | 88.5 | 94.1 | 86.3 | 90.5 | 87.9 | |
| CMV2 | 4 | 86.0 | 91.6 | 83.8 | 88.0 | 85.4 | |
| CMV3 | 10 | 78.0 | 83.6 | 75.8 | 80.0 | 77.4 | |
| CMV4 | 12 | 76.4 | 82.0 | 74.2 | 78.4 | 75.8 | |
| CMV5 | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| CMV6 | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| THT | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| SKW1 | 4 | 86.0 | 91.6 | 83.8 | 88.0 | 85.4 | |
| SKW2 | 4 | 86.0 | 91.6 | 83.8 | 88.0 | 85.4 | |
| SKW3 | 3 | 88.5 | 94.1 | 86.3 | 90.5 | 87.9 | |
| SKW4 | 3 | 88.5 | 94.1 | 86.3 | 90.5 | 87.9 | |
| SKW5 | 20 | 72.0 | 77.6 | 69.8 | 74.0 | 71.4 | |
| SKW6* | 12 | 66.4 | 72.0 | 64.2 | 68.4 | 65.8 | |
| SKW7* | 12 | 66.4 | 72.0 | 64.2 | 68.4 | 65.8 | |
| SKW8* | 12 | 66.4 | 72.0 | 64.2 | 68.4 | 65.8 | |
| SKW9* | 12 | 66.4 | 72.0 | 64.2 | 68.4 | 65.8 | |
| SKW10 | 2 | 92.0 | 97.6 | 89.8 | 94.0 | 91.4 | |
| SKW11 | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| SKW12 | 3 | 88.5 | 94.1 | 86.3 | 90.5 | 87.9 | |
| TSW1 | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| TSW2 | 10 | 78.0 | 83.6 | 75.8 | 80.0 | 77.4 | |
| TSW3 | 6 | 82.4 | 88.0 | 80.2 | 84.4 | 81.8 | |
| TSW4 | 4 | 86.0 | 91.6 | 83.8 | 88.0 | 85.4 | |
| Note: | 3 dB(A) facade effect was added in the calculation | ||||||
| * Assumed 10dB(A) noise attenuation for NSR which would be totally screened from construction activity | |||||||
| Boldface indicate an exceedance of the noise criteria of 75dB(A) for residential uses and 70 dB(A) for temple and library | |||||||