Sample calculation for the construction noise impact assessment (Unmitigated) - 1/F
Foundation Stage
Equipment	Reference	SWL,dB(A)	No. of units
Air Compressors	CNP 002	102	1
Generator, silenced	CNP 102	100	2
Excavator	CNP 081	112	2
Lorry	CNP 141	112	2
Mobile Crane	CNP 048	112	3
Piling, Earth Auger, Auger	CNP 167	114	2
Concrete Lorry Mixer	CNP 044	109	1
		Total SWL	122
The distance correction was calculated based on the following equation:
Distance Correction = 8+20Log(Slant Distance between NSR and Noise Source)
Corrected Noise Level (CNL) = Total SWL - Distance Correction + Façade Effect
Foundation Stage
NSR ID	Horizontal Distance, m	Receiver Height, mPD	Source Height, mPD	Height Different, m	Slant Distance, m	Distance Correction, dB(A)	Façade Effect	CNL, dB(A)
1a	133	10.3	5.2	5.1	133	50	3	75
1b	134	10.3	5.2	5.1	134	51	3	75
2	163	10.3	5.2	5.1	163	52	3	73
3	200	10.3	5.2	5.1	200	54	3	71
4	240	10.3	5.2	5.1	240	56	3	70
5	286	10.3	5.2	5.1	286	57	3	68
13	198	9.7	5.2	4.5	198	54	3	71
14	154	9.7	5.2	4.5	154	52	3	74
15a	134	9.7	5.2	4.5	134	51	3	75
15b	112	9.7	5.2	4.5	112	49	3	76
15c	112	9.7	5.2	4.5	112	49	3	76
15d	124	9.7	5.2	4.5	124	50	3	75
20a	248	10.5	5.2	5.3	248	56	3	69
20b	246	10.5	5.2	5.3	246	56	3	70
21	272	10.5	5.2	5.3	272	57	3	69
23	125	10.5	5.2	5.3	125	50	3	75
24a	157	14	5.2	8.8	157	52	3	73
24b	144	14	5.2	8.8	144	51	3	74
Superstructure Stage
Equipment	Reference	SWL,dB(A)	No. of units
Air Compressors	CNP 002	102	1
Generator, silenced	CNP 102	100	2
Concrete pump	CNP 047	109	1
Concrete Lorry Mixer	CNP 044	109	3
Tower Crane	CNP 049	95	1
Vibratory Poker	CNP 170	113	4
		Total SWL	121
The distance correction was calculated based on the following equation:
Distance Correction = 8+20Log(Slant Distance between NSR and Noise Source)
Corrected Noise Level (CNL) = Total SWL - Distance Correction + Façade Effect
Superstructure Stage
NSR ID	Horizontal Distance, m	Receiver Height, mPD	Source Height, mPD	Height Different, m	Slant Distance, m	Distance Correction, dB(A)	Façade Effect	CNL, dB(A)
1a	133	10.3	5.2	5.1	133	50	3	73
1b	134	10.3	5.2	5.1	134	51	3	73
2	163	10.3	5.2	5.1	163	52	3	71
3	200	10.3	5.2	5.1	200	54	3	70
4	240	10.3	5.2	5.1	240	56	3	68
5	286	10.3	5.2	5.1	286	57	3	66
13	198	9.7	5.2	4.5	198	54	3	70
14	154	9.7	5.2	4.5	154	52	3	72
15a	134	9.7	5.2	4.5	134	51	3	73
15b	112	9.7	5.2	4.5	112	49	3	75
15c	112	9.7	5.2	4.5	112	49	3	75
15d	124	9.7	5.2	4.5	124	50	3	74
20a	248	10.5	5.2	5.3	248	56	3	68
20b	246	10.5	5.2	5.3	246	56	3	68
21	272	10.5	5.2	5.3	272	57	3	67
23	125	10.5	5.2	5.3	125	50	3	74
24a	157	14	5.2	8.8	157	52	3	72
24b	144	14	5.2	8.8	144	51	3	72

Sample calculation for the construction noise impact assessment (Mitigated) - 1/F
Foundation Stage
Equipment	Reference	SWL,dB(A)	No. of units
Air Compressors	CNP 002	102	1
Generator, silenced	CNP 102	100	2
Excavator	BS 5228: Part 1: 1997 Table 7	104	2
Lorry	BS 5228: Part 1: 1997 Table 7	105	2
Mobile Crane	CNP 048	112	3
Piling, Earth Auger, Auger	CNP 167	114	2
Concrete Lorry Mixer	BS 5228: Part 1: 1997 Table 9	92	1
		Total SWL	121
The distance correction was calculated based on the following equation:
Distance Correction = 8+20Log(Slant Distance between NSR and Noise Source)
Corrected Noise Level (CNL) = Total SWL - Distance Correction + Façade Effect
Foundation Stage
NSR ID	Horizontal Distance, m	Receiver Height, mPD	Source Height, mPD	Height Different, m	Slant Distance, m	Distance Correction, dB(A)	Façade Effect	CNL, dB(A)
1a	133	10.3	5.2	5.1	133	50	3	73
1b	134	10.3	5.2	5.1	134	51	3	73
2	163	10.3	5.2	5.1	163	52	3	71
3	200	10.3	5.2	5.1	200	54	3	70
4	240	10.3	5.2	5.1	240	56	3	68
5	286	10.3	5.2	5.1	286	57	3	66
13	198	9.7	5.2	4.5	198	54	3	70
14	154	9.7	5.2	4.5	154	52	3	72
15a	134	9.7	5.2	4.5	134	51	3	73
15b	112	9.7	5.2	4.5	112	49	3	75
15c	112	9.7	5.2	4.5	112	49	3	75
15d	124	9.7	5.2	4.5	124	50	3	74
20a	248	10.5	5.2	5.3	248	56	3	68
20b	246	10.5	5.2	5.3	246	56	3	68
21	272	10.5	5.2	5.3	272	57	3	67
23	125	10.5	5.2	5.3	125	50	3	74
24a	157	14	5.2	8.8	157	52	3	72
24b	144	14	5.2	8.8	144	51	3	72
Superstructure Stage
Equipment	Reference	SWL,dB(A)	No. of units
Air Compressors	CNP 002	102	1
Generator, silenced	CNP 102	100	2
Concrete pump	CNP 047	109	1
Concrete Lorry Mixer	CNP 044	109	3
Tower Crane	CNP 049	95	1
Vibratory Poker	CNP 170	113	4
		Total SWL	121
The distance correction was calculated based on the following equation:
Distance Correction = 8+20Log(Slant Distance between NSR and Noise Source)
Corrected Noise Level (CNL) = Total SWL - Distance Correction + Façade Effect
Superstructure Stage
NSR ID	Horizontal Distance, m	Receiver Height, mPD	Source Height, mPD	Height Different, m	Slant Distance, m	Distance Correction, dB(A)	Façade Effect	CNL, dB(A)
1a	133	10.3	5.2	5.1	133	50	3	73
1b	134	10.3	5.2	5.1	134	51	3	73
2	163	10.3	5.2	5.1	163	52	3	71
3	200	10.3	5.2	5.1	200	54	3	70
4	240	10.3	5.2	5.1	240	56	3	68
5	286	10.3	5.2	5.1	286	57	3	66
13	198	9.7	5.2	4.5	198	54	3	70
14	154	9.7	5.2	4.5	154	52	3	72
15a	134	9.7	5.2	4.5	134	51	3	73
15b	112	9.7	5.2	4.5	112	49	3	75
15c	112	9.7	5.2	4.5	112	49	3	75
15d	124	9.7	5.2	4.5	124	50	3	74
20a	248	10.5	5.2	5.3	248	56	3	68
20b	246	10.5	5.2	5.3	246	56	3	68
21	272	10.5	5.2	5.3	272	57	3	67
23	125	10.5	5.2	5.3	125	50	3	74
24a	157	14	5.2	8.8	157	52	3	72
24b	144	14	5.2	8.8	144	51	3	72