Section 910.APPENDIX A Tables of Long-Term Background Ambient Noise

Section 910.TABLE B Nighttime long-term background ambient L_eq levels in decibels by land use categories and 1/3 octave-band level

	Background Category
Octave-Band Center Frequency (Hz)		1	2	3	4	5

20		53	48	43	37	31
25		54	49	44	38	32
31		55	50	45	39	33

40		55	50	46	39	33
50		56	51	46	40	34
63		56	51	47	41	35

80		57	52	47	41	35
100		58	52	48	42	36
125		57	51	47	41	35

160		56	51	47	41	35
200		56	50	46	40	34
250		55	50	45	39	33

315		54	49	44	38	32
400		53	47	43	37	31
500		52	46	41	35	29

630		51	45	39	33	27
800		50	43	37	31	25
1000		48	41	35	29	23

1250		46	39	33	27	21
1600		44	37	31	25	19
2000		42	35	28	23	16

2500		40	33	25	20	14
3150		39	31	23	18	12
4000		38	29	20	15	10

5000		36	27	18	13	8
6300		34	25	16	11	5
8000		33	23	14	9	3

10,000		31	21	12	7	1
12,500		29	19	10	2