Appendix 4.14b
Predicted Noise Levels from Pavement Breaking and Trench Excavation with Rock during Sewer Construction (With the Use of Quiet Equipment, Restriction on Number of Plant Operating and Use of Noise Screening Structures)
Sensitive receiver	Distance from Construction Activities,        m	Breaking up pavement, dB(A)		Excavation of trench, dB(A)
		With noise screening structure	Without noise screening structure	With noise screening structure	Without noise screening structure
SWL		98.0	#REF!	98.6	#REF!
CMV1	3	83.5	#REF!	84.1	#REF!
CMV2	4	81.0	#REF!	81.6	#REF!
CMV3	10	73.0	#REF!	73.6	#REF!
CMV4	12	71.4	#REF!	72.0	#REF!
CMV5	6	77.4	#REF!	78.0	#REF!
CMV6	6	77.4	#REF!	78.0	#REF!
THT	6	77.4	#REF!	78.0	#REF!
SKW1	4	81.0	#REF!	81.6	#REF!
SKW2	4	81.0	#REF!	81.6	#REF!
SKW3	3	83.5	#REF!	84.1	#REF!
SKW4	3	83.5	#REF!	84.1	#REF!
SKW5	20	67.0	#REF!	67.6	#REF!
SKW6*	12	61.4	#REF!	62.0	#REF!
SKW7*	12	61.4	#REF!	62.0	#REF!
SKW8*	12	61.4	#REF!	62.0	#REF!
SKW9*	12	61.4	#REF!	62.0	#REF!
SKW10	2	87.0	#REF!	87.6	#REF!
SKW11	6	77.4	#REF!	78.0	#REF!
SKW12	3	83.5	#REF!	84.1	#REF!
TSW1	6	77.4	#REF!	78.0	#REF!
TSW2	10	73.0	#REF!	73.6	#REF!
TSW3	6	77.4	#REF!	78.0	#REF!
TSW4	4	81.0	#REF!	81.6	#REF!
MTW1	190	47.4	#REF!	48.0	#REF!
MTW2	240	45.4	#REF!	46.0	#REF!
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