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I need help in:
Figuring out the estimated transmitted sound pressure level, SPL using the reference: worker 1 and worker 2, in the last page and i
f possible referring ACGIH Threshold Limit Value (TLV).
Figuring out how to select a barrier material to reduce noise inside the shaping machine. What is the formula that can be used to figure this out?
Descriptio
n
:
Small motorcycle shop operated by two brothers that provides for their customers:
Complex preventive maintenance, overhaul and repair services of
1
000 lbs pound and less motorcycles. Services include changing oil, air filters, fuel filters, and sparkplugs; inspects, adjusts and replaces necessary parts; tunes and adjusts engines. Repairs and welds motorcycle bodies (oxy-acetylene welding); removes repairs and replaces component parts or assembles automotive systems. Inspects and performs brake repairs, including the replacing of the master brake cylinder, brake pads, calipers, fluid lines, replaces engines and transmissions. The shop also does custom paint jobs and custom sheet metal work using a shaper.
Protection provided to workers:
The shop contains eye wash station, near the front entrance.
· Daily Operation Protective Clothing level (CPC) Level D
· Operating Paint and Sandblaster CPC Level A
Shop will reference OSHA General Industry (
2
9 CFR 1910)
·
1910 Subpart H
, Hazardous materials
·
1910.106
, Flammable liquids
·
1910.107
, Spray finishing using flammable and combustible materials
·
1910 Subpart I
, Personal protective equipment
·
1910.1
3
2
, General requirements
·
1910.13
4
, Respiratory protection
·
1910 Subpart J
, General environmental controls
·
1910.147
, The control of hazardous energy (lockout/tagout)
· Hydraulic Lift for motorcycles
·
1910 Subpart L
, Fire protection
·
1910.157
, Portable fire extinguishers
·
1910 Subpart O
, Machinery and machine guarding
·
1910.215
, Abrasive wheel machinery
·
1910 Subpart S
, Electrical
·
1910.303
, General requirements
·
1910.305
, Wiring methods, components, and equipment for general use
·
1910 Subpart Z
, Toxic and hazardous substances
·
1910.1200
, Hazard communication
· Sandblasting (removing of paint and rust from motorcycle parts)
· Breathing Air CO monitor for Radex
· Blast Suit-Leather & Canvas
· Nova 2000 Blast Hood and gloves
· Hearing Protection, 3M Peltor, offering 27dB attenuation. With Protection level of 87dB-98dB.
· Custom Painting
· Bandit Respirator with organic vapor cartridge/N95 filter
· Latex Gloves
· Multi-Use Disposable Coveralls
· Spray Socks
· Hearing Protection, 3M Peltor, offering 27dB attenuation. With Protection level of 87dB-98dB.
Worker 1
|
SPL per Octave Band in dBA |
||||||||||||||
|
Location |
125 Hz |
250 Hz |
500 Hz |
1 kHz |
2 kHz |
4 kHz |
||||||||
| 1 |
98.4 |
102.4 |
100.0 |
95.6 |
89.3 |
79.8 |
||||||||
| 2 |
99.2 |
103.5 |
99.5 |
93.0 |
88.3 |
74.9 |
||||||||
| 3 |
101.3 |
99.9 |
103.7 |
96.4 |
90.7 |
77.1 |
||||||||
| 4 |
100.5 |
99.3 |
98.0 |
92.1 |
78.3 |
Worker 2
|
104.6 |
|
103.0 |
|
106.9 |
20.0 ft
40.0 ft Epoxy Floor Coating
8.33 ft
15.8 ft
Acoustical Wall Fabric: Sound
absorption rating of NRC .20
Mid-Size Finishing Paint Booth
8.30 ft
12.9 ft 100LBS
Sandblaste
r w/Water
extractor
Sheet Metal
Shaping Machine
Hydraulic
Motorcycle
lift
Hydraulic
Motorcycle
lift
5.00 ft
2.50 ft
Filter Average
Arrestance Percent
99.99
MERV 11
5.00 ft
8.33 ftBathroom
Tool
Box
Eye
Wash
Statio
n
