[Retracted] Environmental Impact Assessment of Production Plant during Construction Period

Table 6

Intensity and distance limits of different noise sources.

Name of noise sources	Intensity of noise source (dB)	Minimum interference radius of different limits (m)
		70 dB (day)	55 dB (night)
Electric saw	103	45	251
Bending machine	90	50	281
Carpenter’s plane	87	21	119
Concrete mixer	87	21	119
Electric welding machine	86	32	177
Concrete pump truck	85	28	158
Excavator	81	18	100
Steel bar shearing machine	77	16	88