Project No. 1825 Monthly Environmental Monitoring & Audit Report for Port Shelter Phase 3, Po Toi O Sewerage Treatment Plant
	Noise Monitoring Stations Leq 30 mins Noise Monitoring Data
	Month	2021/04
	Monitoring Location :		NMS1N
	Start Date & Time	Leq30min dB(A)*	L90 dB(A)	L10 dB(A)	Limit Level dB(A)
	2021-04-07	60.4	54.0	61.5	75		1096478.2
	2021-04-13	58.4	45.5	62.0	75		691830.97
	2021-04-19	64.7	52.0	67.5	75		2951209.2
	2021-04-29	Monitoring suspend					#VALUE!
	Average :	62.0
	Action Level :	When one valid documented complaint is received
	Limit Level :	75.0 dB(A)
	* Remark: For Free-field measurement, a correction of +3dB(A) should be made to the measured results.
	Monitoring Location :		NMS2N1
	Start Date & Time	Leq30min dB(A)*	L90 dB(A)	L10 dB(A)	Limit Level dB(A)
	2021-04-07	53.2	51.0	55.0	75		208929.61
	2021-04-13	56.7	49.0	59.5	75		467735.14
	2021-04-19	63.8	55.0	67.0	75		2398832.9
	2021-04-29	Monitoring suspend					#VALUE!
	Average :	60.1
	Action Level :	When one valid documented complaint is received
	Limit Level :	75.0 dB(A)
	* Remark: For Free-field measurement, a correction of +3dB(A) should be made to the measured results.
	Monitoring Location :		NMS3N
	Start Date & Time	Leq30min dB(A)*	L90 dB(A)	L10 dB(A)	Limit Level dB(A)
	2021-04-07	68.0	58.5	69.0	75		6309573.4
	2021-04-13	57.5	54.0	59.0	75		562341.33
	2021-04-19	52.6	48.5	55.5	75		181970.09
	2021-04-29	Monitoring suspend					#VALUE!
	Average :	63.7
	Action Level :	When one valid documented complaint is received
	Limit Level :	75.0 dB(A)
	* Remark: For Free-field measurement, a correction of +3dB(A) should be made to the measured results.
	Monitoring Location :		NMS4N
	Start Date & Time	Leq30min dB(A)*	L90 dB(A)	L10 dB(A)	Limit Level dB(A)
	2021-04-07	58.7	48.5	61.0	75		741310.24
	2021-04-13	53.2	42.5	54.0	75		208929.61
	2021-04-19	50.3	42.0	54.0	75		107151.93
	2021-04-29	Monitoring suspend					#VALUE!
	Average :	55.5
	Action Level :	When one valid documented complaint is received
	Limit Level :	75.0 dB(A)
	* Remark: For Free-field measurement, a correction of +3dB(A) should be made to the measured results.