Document XzmjVB8bGVmVGOjbyrJobNeq4
*mr cyanamid
To: A. W. Delgado
Location: Azusa
From:
N. D. Yin
Location: Wayne
Extension: ^708 Subject: I. H. SURVEY - AZUSA
Reference:
Date: Copy to:
April 25, 1985
Route to:
J. C. Caporossii - NA
J. Marin
- AZ
R. P . Kreahling - NA
J. B. Reid
- NA
An industrial hygiene survey was conducted at Azusa on February 26 to 28, 1985. Below are items accomplished during this survey and recommendations fr>r action where indicated.
A. Noise
The OSHA required annual noise survey was completed by measuring area and personal exposures. Major noise sources, previously identified as the Miller-Grinder machine in the calciner area and the attic fan in the metal solution area (I.H. survey report, Azusa Plant, August 23-26, 1982), remain.
However, because of worker mobility, all personal exposures measured were below the OSHA and Cyanamid permissible limit of 90 dBA. Results are in Tables A1 to A5.
B. Chemical Exposure
Employee exposures to dusts, metals (lithium, nickel) and NO2 were monitored. Results, listed on Table B1 to B2, showed that exposures measured were all below Cyanamid and OSHA limits.
C. Asbestos
An asbestos inspection was conducted during this survey. Non-process areas (administration building and training center) were inspected. No structural asbestos material was found. This completes Azusa's requirements for the Chemicals Groups' asbestos study of non-process areas.
A. W. DELGADO
^03
A. W. DELGADO
MAY Ofi 1985
Since the nitric acid pipe insulation material was removed prior to this survey, wipe samples were collected during this survey to ensure the elimination of the asbestos. The negative results from wipe samples proved that the contractor involved has done a thorough job.
A field test was performed on the steam pipe (next to nitric acid pipe) insulation. Positive results confirmed by lab analysis indicated an asbestos content as 30Z amosite and 20Z chrysotile. Other tanks and pipes insulation have yet to be tested.
Recommendation
'
1. Complete the Identification of asbestos materials in process areas before the end of 1986.
2. Use Attachment Cl as a guide for any asbestos removal project. Plant maintenance employees are required to take the protective measures described in Table D1 when working with asbestos.
3. Monitor personal/area asbestos exposures where asbestos is identified to assure compliance with the OSHA asbestos standard.
P. Ventilation
A ventilation inspection was made of all chemical hoods in the laboratory. Face velocities measured for these hoods showed that they do not meet Chemicals Group required air flows (Table Dl).
Recommendation
1. Modify laboratory exhaust ventilation systems to bring minimum face velocities to 80 FPM for all hoods.
Please prepare a proposal implementation plan to assure compliance with these recommendations and submit a copy to the writer for review. A final plan should be established by 6/15/85.
NPY/nl 08/6645G
Attachments
N. D. Yin
0229
TABLE A - l R esults o f Area Noise Survey
C alciner Area, Azusa P lant February 27, 1985
(o ff)
0230
TABLE A-l (continued)
Results of Area Noise Survey Calciner Area, Azusa Plant
February 27, 1985
Location
.1 Grinder Area (off)
2. "A" calciner
3. Oven "A" 4. Dryer "D" (off)
.
5. Conveyor from Extruders
.6 Sulfuric Acid Tank
7. Hopper (300-102)
8. West Side of Oven "B" (off) 9. Calciner "C" (off)
10. Bucket Elevator (430-003 and 008)
11. Between Northside Impregnators (off)
12. In front of Control Panel
13. Between Southside Impregnators (off)
14. SWEECO Finish Product Hopper
15. Packing Station
16. Calciner "B" (off)
.
17. Between Calciner "B" and Kiln Cooler
18. Dryer "C" (off)
'
87 85
85 79.5 87.5 87 85 85 76.5
86.5 86 86.5 87 84 83 82 81.5 81
0231
TABLE A-2
Results of Area Noise Survey Metal Solution Platform Azusa Plant February 27, 1985
Location 1. Next to Desk 2. East Side of Tank 300-036 3. Between Nitric Acid Tanks Under Attic Fan 4. South Side of Cobalt Nitrate Tank (300-27) 5. South Side of Cobalt Nitrate Tank (300-30) 6. Southwest Corner 7. Between Moly Tanks
dBA Level (slow response) 86 89 94
89.5 87 85.5 89
0232
TABLE A-3
Results of Art* Noise Survey Extruder Are* (First Floor)
Azus* Plant
February 27, 1985
N E
Location
1. In front of Extruder "C" (on}
2. ditto
"B" (off)
3. Cure Washing Tanks (off)
4. ditto
"D" (on)
5. Center of the Area
dBA Level (slow response) 89 87.5 85 89 87
0233
TABLE A-4
Results of Area Noise Survey Muller Area, Second Floor
Azusa Plant February 27, 1985
Location
Between Mixer B&C 2. Cure Washing Tank Area 3. Next to Fine Bin Tank 4. Between Mixer A & B
dBA Level (slow response)
85 84 . 85 86
0234
TABLE A-5 Results of Area Noise Survey
Muller Area, Third Floor Azusa Plant
February 27, 1985
Location 1. At Mixer A (operating) 2. At Mixer B (off) 3. Next to Fine Bin Tank (300-110) 4. At Mixer C (operating) 5. In front of Control Panel 6. Heigh Scale
dBA Level (slow response) 86 83 85 85 85.5 84
0235
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NDY/nl 08/6645G
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