Ill. Admin. Code tit. 35, pt. 910, app A, tbl. D

Current through Register Vol. 48, No. 49, December 6, 2024

Table D - Nighttime long-term background ambient L[eq] levels in decibels by land use categories and octave-band level

	Background Category
Octave-Band Center Frequency (Hz)	1	2	3	4	5
31	60	55	50	44	38
63	61	56	52	46	40
125	62	56	52	46	40
250	60	55	50	44	38
500	57	51	46	40	34
1000	53	46	40	34	28
2000	47	40	33	28	21
4000	43	34	25	20	15
8000	38	28	19	14	8