[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR62.190]
[Page 417-419]
TITLE 30--MINERAL RESOURCES
CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
PART 62--OCCUPATIONAL NOISE EXPOSURE--Table of Contents
Sec. 62.190 Records.
(a) The authorized representatives of the Secretaries of Labor and
Health and Human Services must have access to all records required under
this part. Upon written request, the mine operator must provide, within
15 calendar days of the request, access to records to:
[[Page 418]]
(1) The miner, or with the miner's written consent, the miner's
designee, for all records that the mine operator must maintain for that
individual miner under this part;
(2) Any representative of miners designated under part 40 of this
title, to training certifications compiled under Sec. 62.180(b) of this
part and to any notice of exposure determination under Sec. 62.110(d) of
this part, for the miners whom he or she represents; and
(3) Any former miner, for records which indicate his or her own
exposure.
(b) When a person with access to records under paragraphs (a)(1),
(a)(2), or (a)(3) of this section requests a copy of a record, the mine
operator must provide the first copy of such record at no cost to that
person, and any additional copies requested by that person at reasonable
cost.
(c) Transfer of records. (1) The mine operator must transfer all
records required to be maintained by this part, or a copy thereof, to a
successor mine operator who must maintain the records for the time
period required by this part.
(2) The successor mine operator must use the baseline audiogram, or
revised baseline audiogram, as appropriate, obtained by the original
mine operator to determine the existence of a standard threshold shift
or reportable hearing loss.
Appendix to Part 62
Table 62-1--Reference Duration
------------------------------------------------------------------------
dBA T (hours)
------------------------------------------------------------------------
80........................................................ 32.0
85........................................................ 16.0
86........................................................ 13.9
87........................................................ 12.1
88........................................................ 10.6
89........................................................ 9.2
90........................................................ 8.0
91........................................................ 7.0
92........................................................ 6.1
93........................................................ 5.3
94........................................................ 4.6
95........................................................ 4.0
96........................................................ 3.5
97........................................................ 3.0
98........................................................ 2.6
99........................................................ 2.3
100....................................................... 2.0
101....................................................... 1.7
102....................................................... 1.5
103....................................................... 1.3
104....................................................... 1.1
105....................................................... 1.0
106....................................................... 0.87
107....................................................... 0.76
108....................................................... 0.66
109....................................................... 0.57
110....................................................... 0.50
111....................................................... 0.44
112....................................................... 0.38
113....................................................... 0.33
114....................................................... 0.29
115....................................................... 0.25
------------------------------------------------------------------------
At no time shall any excursion exceed 115 dBA. For any value, the
reference duration (T) in hours is computed by: T = 8/2(L-90)/5 where
L is the measured A-weighted, slow-response sound pressure level.
Table 62-2--``Dose''TWA 8 Equivalent
------------------------------------------------------------------------
TWA\8\
Dose (percent)
------------------------------------------------------------------------
25........................................................... 80
29........................................................... 81
33........................................................... 82
38........................................................... 83
44........................................................... 84
50........................................................... 85
57........................................................... 86
66........................................................... 87
76........................................................... 88
87........................................................... 89
100.......................................................... 90
115.......................................................... 91
132.......................................................... 92
152.......................................................... 93
174.......................................................... 94
200.......................................................... 95
230.......................................................... 96
264.......................................................... 97
303.......................................................... 98
350.......................................................... 99
400.......................................................... 100
460.......................................................... 101
530.......................................................... 102
610.......................................................... 103
700.......................................................... 104
800.......................................................... 105
920.......................................................... 106
1056......................................................... 107
1213......................................................... 108
1393......................................................... 109
1600......................................................... 110
1838......................................................... 111
2111......................................................... 112
2425......................................................... 113
2786......................................................... 114
3200......................................................... 115
------------------------------------------------------------------------
Interpolate between the values found in this Table, or extend the Table,
by using the formula: TWA8 = 16.61 log10 (D/100) + 90.
Table 62-3--Age Correction Value in Decibels for Males (Selected
Frequencies)
------------------------------------------------------------------------
kHz
Age (years) -----------------------
2 3 4
------------------------------------------------------------------------
20 or less...................................... 3 4 5
21.............................................. 3 4 5
22.............................................. 3 4 5
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23.............................................. 3 4 6
24.............................................. 3 5 6
25.............................................. 3 5 7
26.............................................. 4 5 7
27.............................................. 4 6 7
28.............................................. 4 6 8
29.............................................. 4 6 8
30.............................................. 4 6 9
31.............................................. 4 7 9
32.............................................. 5 7 10
33.............................................. 5 7 10
34.............................................. 5 8 11
35.............................................. 5 8 11
36.............................................. 5 9 12
37.............................................. 6 9 12
38.............................................. 6 9 13
39.............................................. 6 10 14
40.............................................. 6 10 14
41.............................................. 6 10 14
42.............................................. 7 11 16
43.............................................. 7 12 16
44.............................................. 7 12 17
45.............................................. 7 13 18
46.............................................. 8 13 19
47.............................................. 8 14 19
48.............................................. 8 14 20
49.............................................. 9 15 21
50.............................................. 9 16 22
51.............................................. 9 16 23
52.............................................. 10 17 24
53.............................................. 10 18 25
54.............................................. 10 18 26
55.............................................. 11 19 27
56.............................................. 11 20 28
57.............................................. 11 21 29
58.............................................. 12 22 31
59.............................................. 12 22 32
60 or more...................................... 13 23 33
------------------------------------------------------------------------
Table 62-4--Age Correction Value in Decibels for Females (Selected
Frequencies)
------------------------------------------------------------------------
kHz
Age (years) -----------------------
2 3 4
------------------------------------------------------------------------
20 or less...................................... 4 3 3
21.............................................. 4 4 3
22.............................................. 4 4 4
23.............................................. 5 4 4
24.............................................. 5 4 4
25.............................................. 5 4 4
26.............................................. 5 5 4
27.............................................. 5 5 5
28.............................................. 5 5 5
29.............................................. 5 5 5
30.............................................. 6 5 5
31.............................................. 6 6 5
32.............................................. 6 6 6
33.............................................. 6 6 6
34.............................................. 6 6 6
35.............................................. 6 7 7
36.............................................. 7 7 7
37.............................................. 7 7 7
38.............................................. 7 7 7
39.............................................. 7 8 8
40.............................................. 7 8 8
41.............................................. 8 8 8
42.............................................. 8 9 9
43.............................................. 8 9 9
44.............................................. 8 9 9
45.............................................. 8 10 10
46.............................................. 9 10 10
47.............................................. 9 10 11
48.............................................. 9 11 11
49.............................................. 9 11 11
50.............................................. 10 11 12
51.............................................. 10 11 12
52.............................................. 10 12 13
53.............................................. 10 13 13
54.............................................. 11 13 14
55.............................................. 11 14 14
56.............................................. 11 14 15
57.............................................. 11 15 15
58.............................................. 12 15 16
59.............................................. 12 16 16
60 or more...................................... 12 16 17
------------------------------------------------------------------------
[64 FR 49630, Sept. 13, 1999, as amended at 65 FR 66929, Nov. 8, 2000]