Restricted Hours Noise Monitoring Results

Station NM4
Date	Start Time	End Time	Weather	Noise level (dB(A)), 5 min			Major Construction Noise Source(s) Observed	Other Noise Source(s) Observed	Remarks	Temp. (°C)	Wind Speed (m/s)	Noise Meter Model / ID	Calibrator Model / ID
Date	Start Time	End Time	Weather	Leq	L10	L90	Major Construction Noise Source(s) Observed	Other Noise Source(s) Observed	Remarks	Temp. (°C)	Wind Speed (m/s)	Noise Meter Model / ID	Calibrator Model / ID
04-Jul-10	10:22	10:27	Sunny	66	67	64	No construction work observed.	Traffic Noise	-	31	0.2	RION- NL31 (S/N 00983400)	RION - NC73 (S/N 10786708)
	10:27	10:32	Sunny	66	68	63			-
	10:32	10:37	Sunny	65	66	63			-
	10:22	10:37	Sunny	65	67	64			Average results during 15 min monitoring
11-Jul-10	09:28	09:33	Sunny	65	66	63	No construction work observed. Noise from two crawler cranes at Leighton Site.	Occasional ship vessel pass-by noise captured.	-	33	0.4	RION- NL31 (S/N 00983400)	B&K4231 (S/N 2699361)
	09:33	09:38	Sunny	65	67	64			-
	09:38	09:43	Sunny	67	68	64			-
	09:28	09:43	Sunny	66	67	64			Average results during 15 min monitoring
18-Jul-10	10:23	10:28	Sunny	66	68	63	No construction work observed. Noise from a crawler crane at Leighton Site.	Occasional ship vessel pass-by noise captured.	-	28	0.2	RION- NL31 (S/N 00983400)	RION - NC73 (S/N 10997142)
	10:33	10:38	Sunny	65	66	64			-
	10:38	10:43	Sunny	65	67	64			-
	10:23	10:43	Sunny	65	67	64			Average results during 15 min monitoring
25-Jul-10	08:33	08:38	Sunny	64	66	62	No construction work observed. Noise from 2 concrete lorry mixers at Leighton Site.	Occasional ship vessel pass-by noise captured.	-	30	0.3	RION- NL31 (S/N 00983400)	RION - NC73 (S/N 10997142)
	08:38	08:43	Sunny	65	67	63			-
	08:43	08:48	Sunny	65	66	63			-
	08:33	08:48	Sunny	65	66	63			Average results during 15 min monitoring
									-			RION- NL31 (S/N 00983400)	RION - NC73 (S/N 10786708)
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			Min.	64
			Max.	67