Document zQ2yMB7dnpMd2r4Ka6pmGw127
FILE NAME: JH DATE: 1977 Jan 5 DOC#: JH003 DOCUMENT DESCRIPTION: J-M Memo RE Evaluation of James Hardie's Personal Dust Sampling Pump - Filter Doesn't Clear
Sffl Johns-Manville
* V.B. I U m - 1-04
Internal Correspondence
Dm-. January 5,
l* .
D.R. Christensea - Rid)
C*pm: C .L , Swallow - 1-04
SufafMI; EVALUATION - JANES HAW)II, LTD PERSONAL DUST SAMPLING PUMP YOUR UTTER 10-21-74
Over the past two months the Rocky Mountain Laboratory has done sows pump performance work In the laboratory and some simultaneous sampling in the field for asbestos exposure determinations. The raaulta
of th is work la aa follows!
^Enclosed *a;ia graph depleting the performance of the pump over as
4 | 8 hoursampW period. A mean flow rate of 54.0 cc/aln for the eight
M1S/-2*5X variation Is eserptlonal perferwance, 'pumps currently used ch a ra c te ristica lly exhibit
i v ^ ^ H a f t o n i o f X.
m t m j m ....................... '^|;?4uhiixpl^Mbly the' fi lt e r dos not clear very good. This same phenomena
'Wh|i' ohaerving Dr. McCullagh'a samples he brought from
not the f i l t e r media or the cle a rla t
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4 a' i / i M i t S f n . f A A a u1 f h ( h t a r t I I . 1 t . k i n # A f t h e
Sill
:>l S1HULTA1C0U8 AMPtlNC
Qaian1ma up akii in fh fimlA
T l^r*iuX tfrtioU ow ii
fmti#niioii lft th* flnlahlnt dfDirt
EVALUATION - JAMES HARDIE, LID PERSONAL DUST SAMPLING PUMP PACI 2
Cenerai c o m n t i r e la t iv e to the use o f th is pump are th at I t la very convien i due to it * s compactness and lo c a tio n during sampling (breast p o ck e t). A lso due to l t vs s im p lis t ic d e s ig n , maintenance seems to be minimal* The only drawback to date is the problema encountered with clearin g the filt e r
I f you a r e . in te re ste d is seein g the piece o f equipment in o peration le t me know and 1 w i ll bring i t up to WHQ fo r a demonat r a t io n .
Penny
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