Document VJpJdZm2jvV5ZMYr4NYg7OpqZ
FILE NAME: Square D(SQD) DATE: 1973-1974 DOC#: SQD003 DOCUMENT DESCRIPTION: Memos
&
Georgs D. Clayton & Associates
Division of Marlennan Management Systems, Inc.
i*
25711 Southfield Road, Southfield, Michigan 48075 Telephone: 313-352-3120
m
8-0
April 10, 197 3
*
for better environment
Mr. Frank J. Hitchcock
Square D Company
,
Circuit Breaker Division
3700 Sixth Street, S.W.
Cedar Rapids, Iowa 52406
RE: Job No. 1865-473-LA
Dear Mr, Hitchcock:
The twelve filters for asbestos counting which you submitted to ua on April 5, 1973 have been analyzed as you'requested and are re ported below using the sampling data which you supplied to us:
Lab No.
Sample No.
Asbestos Fibers >5ji/ml
53621 53622
53623 53624 53625 53626 53627' 53628 53629 53630 53631 53632
1 2 3 4 5 6 7 8 9 10 11 12
18.0 0.67 0.19 0.05 0.03 0.06 0.08 0.05 0.29 0.12 4.7 3.1
We trust this report will prove helpful.
.SVe'.r...y." " struly
yours, j
/
tit J.
Robert G. Keenan Vice-President Director, Laboratory
Services
RGK;dv
- /L,5i=-
SQDKVR_013047
'ieorgs D. Clayton & Associates
Division of Marlennan Management Systems, inc.
25711 Southfield Road, Southfield, Michigan 48075 Telephone: 313-352-3120
April 10, 1973
l if for bcttoi environment
%v
Mr. Frank J. Hitchcock Square D Company Circuit Breaker Division 3700 Sixth Street, S.W. Cedar Rapids, Iowa 52406
" RE: Job Ho. 1865-473-LA
Dear Mr. Hitchcock:
The twelve filters for asbestos counting which you submitted to us on April 5, 1973 have been analyzed as you-requested and are r e ported below using the sampling data which you supplied to us:
Lab No.
Sample No.
Asbestos Fibers >5p,/ml
53621
1
18.0
53622
2
0.67
53623
3
0.19
i
53624
4
0.05
53625
5
0.03
53626
6
0.06
53627
7
0.08
53628
8
0.05
53629
9
0.29
53630
10
0.12
53631
11
4.7
53632
12
3.1
We trust this report will prove helpful..
Ver^. truly you r s , j
3 \ r U Ji j i'
Robert G. Keenan Vice-President Director, Laboratory
Services
RGK:dv
i'.t.'. VM. B/l ScL
SQDKVR_013048
""N
R O U T E TO:
SQUflREH COMPANY
INTER-OFFICE
DM
,">o" IE-2
C. W. Denny III
W. E. Ballin
SU9JECT Air Analysis Report
DATE May 1, 1973
<=<= F. Hitchcock D. Ferguson M- Garlick
In accordance with OSHA section 19.10.93a tests were conducted in the molding areas of the Cedar Rapids Square D facility for the enumeration of airborne mineral dusts. These tests were conducted by Max Garlick and myself during the period of April 2 thru April 29-, 1973.
The attached report lists the results of these tests.
William E. Ballin Industrial Engineer
he
SSD2-J
SQDKVR 013042
SQUARE D COMPANY CEDAR RAPIDS PLANT
May 1 , X973
AIR ANALYSIS REPORT
PURPOSE The purpose of these tests was to determine the source and level of concentration of airborn asbestos fibers.
METHOD OF ANALYSIS Millipore filter holder containing 0.8jpm membrane filter was attached to a MSA portable pump which provided a source of suction. The airborne contaminations were collected on these filters. They were sent to George D. Clayton and Associates Incorporated for analysis by Phase Microscope Counting Techniques. The results of these analysis are shown on the attached air analysis table.
DISCUSSION The current OSHA standard establishes a Threshold Limit Value of no more than five fibers longer than five microns in length per cubic centimeter of air. The standard futher states that at no time may the ceiling limit of 10 fibers per cubic centimeter be excelled. To pinpoint areas requiring additional improvement the tests have been segregrated into several job areas. They being manual molding, auto molding set-up, preform manufacture, part cleaning, house keeping and maintenance. Manual molding concentrations are well within limits when preforms were utilized (sample #2, #3, #4-, #5, #6, and #7). A marked increase in the level of concentration was noted when Durez 23639 was used in a loose condition (sample #11). Fan operation appeared to have little effect on counts. (sample #13). Auto molding set-up was within limits and poses no problem. (sample #9 and #10)
SQDKVR 013043
PAGE 2
Preform manufacture appeared to be the major source of con tamination (sample #1 and #13) however, after the equipment was reengineered to eliminate and enclose dust generating areas the readings fell to well within limits (sample #19 and #22), The preform grinder requires additional engineering to bring dust output to a reasonable level (sample #1# and #20). Plant Engineering is now in the process of evaluating and designing preform grinder equipment which will bring these readings within the standard. Maintenance will have the necessary changes accomplished by May 11, 1973. Part cleaning operators on the multitable are within limits, (sample #8) Housekeeping personnel are not exposed to levels greater than the Threshold Value (sample 16) . Equipment maintenance does not generate dust in excess of the limits (sample #15) In addition several general air samples were taken in manual molding to note the effects of sweeping and grinding of preforms (samples #17, #18 and #21). Slight increases are noted but the samples all fall below the Threshold Value.
CONCLUSION With the changes to be incorporated into the preform grinder all areas should fall within prescribed limits. This coupled with a medical examination program will allow us to comply with OSHA.
SQDKVR 013044
Sample NO. 1 2
3
4
5 6 7
8
9 10 11
12 13
Sample Date
April 2, 1973 April 2, 1973
April 2, 1973
April 2, 1973
April 2, 1973 April 2, 1973 April 2, 1973
April 2, 1973
April 3, 1973 April 3, 1973 April 3, 1973
April 3, 1973 April 23, 1973
PAGE - 3
Location and Events
Asbestos
Concentration
(Fibers/ML)
Breathing zone at preform machine CA 348, molding powder 639.
18.0**
Breathing zone sample at amnual molding station FE 130-1 and FE 133-1, molding powder - 509 preform, 639 preform.
0.67
Breathing zone sample at manual molding station CA 477 & CA 478, molding powder 509 preform.
0.19
Breathing zone sample at manual molding station FE 127-1 & FE 132-1 molding powder
- 509 preform.
0.05
Breathing zone sample at manual molding station FE 129-1, molding powder - 509 loose.
0.03
Breathing zone sample at manual molding station FE 118-1 molding powder - 482 preform.
0.06
Breathing zone sample at auto mold machine CA 23 being raw manually, molding powder - 771 preform
0.08
Breathing zone sample at multitable cleaning station FE 395, molded material 509.
0.05
Breathing zone sample on auto molding set-up (operator invalidated test).
0.29
Breathing zone sample on auto molding set-up.
0.12
Breathing zone sample at manual molding
station CA 373 & FE 130-1, molding powder
- 639 loose, 509 preform.
4.7
Breathing zone sample at preform machine
FE 123-1, molding powder 24060.
3.1
Breathing zone sample at manual molding station FE 121-1 & FE 122-1, molding powder - 639 preform, 482 preform.
0.29
SQDKVR 013045
Sample No. 14
15
16
17 18 19
20
21 22
PAGE - 4 -
Sample Date
April 23, 1973
April 23, 1973
April 23, 1973
April 23, 1973 April 23, 1973 April 24, 1973
April 24, 1973
April 24, 1973 April 24, 1973
Location and Events
Breathing zone sample at preform grinder CA 586, molding powder - 639
Breathing zone sample equipment repair preform machine CA 348.
Breathing zone sample sweeping manual and auto mold areas.
General air sample after sweeping
General air sample - Datum Base
Breathing zone sample at preform machine CA 348, molding powder - 639
Breathing zone sample at preform grinder CA 586, molding powder 639, fan on.
General air sample after preform grinding
Breathing zone sample at preform machine CA 348, molding powder 639, fan on.
Asbestos Concentration fFibers/MLll
0.11 0.006 0.002
.012
44. 8** 0.01 0.35
*Exceeds Threshold Limit Value of 5.0 Fibers/ML **Exceeds Ceiling Value of 10.0 Fibers/ML
SQDKVR 013046
LABORATORY REPORT
P. 0. Box 428 Cedar Rapids, Iowa 52406
(319)398-3687
To: Square D Company 3700 6th St. S.W . Cedar Rapids, Iowa 52406
Attn: Bill McGregor
Dntp 1/31/75____________
A. R_______ Z24_______________
I. R______________ 7___________ Dat R r'J 1/28/75 Sample A ir Particulates Order No_____________________
Asbestos Fiber Counts
Sample Auto Room Semi Press Preformer
Fibers per ml. 3.30 ?J 4.45
5.3 9
The samples from the Auto Room and the Semi Press had a variety of fibers, some of which may not be asbestos. However, using the technique recommended by O SH A, the fibers would all be considered as asbestos using a modifying crossed Nicol prism to eliminate nonbirefringent fibers.
The sample from the preformer had extrem ely d istin ct asbestos fibers.
Bedford Laboratories
KWKrmh
K. W. Kifcby
SQDKVR 013019
LABORATORY REPORT
P. O. Box 428 Cedar Rapids, Iowa 52406
(319)398-3687
Square D Company 3700 6th Street S.W . C e d a r Rapids, Iow a 52406
Attn: Bill Berman
Dm* 7/29/74____________
A. R. 525________________
I. R______________ _ __________ Dote Rec*d 7/17/74 Sample nf A ir Contaminant
Order No. 72246
Asbestos Fiber Analysis C o llected on M illipore Filter
Sample
1974 C Z A ; collected for 30 minutes at 2 liters per minute
Fibers per ml. Greater than 5 Micrometer
4.45
The counting procedure was that described by the U. S. Public Health Service as practiced by N IO SH .
KWKsmh
Bedford Laboratories K. W. Kirby
SQDKVR 013024
LABORATORY REPORT
P. 0 . Box 428 Cedar Rapids, Iowa 52406
{319)398-3687
To: Square D Company 3700 6th Street S. W. Cedar Rapid*, Iowa 52406
Attnj BUI Berman
Date____ 7/29/74__________
A. R_____ S & ______________
Date Rec'd 7/17/74 Sample nf Air Contaminant Order No____ 72246
Asbettei Fiber Analysts Collected on MHlipore Filter
Sample
1974 CZA j collected for 30 minutes at 2 Uteri per minute
Fiber* per ml. Greater than 5 Micrometer
4.45
The counting procedure was that described by the U. S. Public Health Service as practiced by NiOSH.
KWKtmh
Bedford laboratories K. W. Mrby
SQDKVR_013025