Document 1gXzeVqNR1LkBgGJDe6bNOw3Z
Monaca* fMM 4ioca,,on^W. R.''Richard - Research Center
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May 13, 1969
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AROCLOR - ANALYSIS IN PESTICIDE
RESIDUES"
(Visit to Prof. Q. Widmark U. of Stockholm - May 5, 1969)
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Widmark was finding
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p. Keller
A-Lab
TD. Wheeler
EWHEE
E. Tucker
Res. c
H. Bergen-
HBERG
D. Olson
DOLSO
W. Kuhn
WKUHN
R. Kountz
RK0UN
R. Davis
RDAVI
P. Benignus/J. BryantfBENI
J. Fallon
JFALL
Q. Thompson
QTH0M
R. Weiss
RWEIS
L. Stark
LSTAR
Springate
JSPRI
rr=jT,M'. Farrar
Res. 1
W, Waychoff
WWAYC
C. Paton
. CPAT0
R. Baxter
RUAB0N
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... CI5 and Cl chlorinated biphenyls from extraction of.salmon and
from extraction of -waste .sewage sludge.
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V . ToVf iClV and .Cle .chlorinated biphenyl
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'J" ' T '' -Borne Clio
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: `No Clu .and CliE>;.:'' ;
'.This -corresponds 'roughly to ?Clophen 50 or .Aroclor 1254.
v.-'Theiisomers found in nature *are.not the same ratloe ae In either rAroclor
^1254 nr Clophen 50..
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'Widmark ^ a s examined 2000 samples from the .BalticJSe#. :A n o t h e r -.group .of
> 'They reported very low losB jof chlorinated biphenyls,.an occasional.SBplll.
.-Widmark kept hitting at marine paints as'a uaource of,the product*
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He wanted Monsanto to restrict sale to those closed -system applications.
He asked if the economic value of PCB's waB worth the bad publicity which would come to Monsanto.
We countered with a question. What products would he recommend as sub
stitutes? What kinds of synthetic compounds are biologically acceptable?
Would he help establish a safe tolerance level of synthetic compounds in
wild-life?
PLAINTIFF'S
EXHIBIT
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Ae reported that he had not isolated or found.much chlorinated biphenyl
with 1 through 4 Cl atoms. This might be because Aroclor 1242 and below
is more biodegradable; (or it could be due to the analytical isolation
and separation methods; or perhaps Aroclor 1242 iB less exposed in the
world.)
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'Widmark is dedicated to better and more accurate analysis. He is in sympathy with most of the ecologistb demanding elimination of chlorinated pesticides. H 1 b knowledge of scientific evidence and.its requirements makes him Blightly hesitant in condensing Aroclor itself or demanding its total eclipse.
Keller and Wheeler should have a more complete report. . ..,*
Widmark reported not finding chlorinated naphthalene, chlorinated p.araffin, chlorinated benzene; chlorinated terphenyl. He thought he had identified and accounted for 80 # or more of the lipid Boluble extractable chlorine containing compounds.
Based: ori these remarks of Widmark we might ^consider alternate products and actions.
:What 1b the C1b and Cle content of Aroclor 1242?
;!Ehe Aroclor 1242-has 31# dichloro, . 55# trichloro ; `.\\ :vi^'l6# .tetrachloro
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.v.;;The CIb vContent .miust bevery.-low in our .present material. .If -**
'Aroclor 1242 1b Indeed biodegradable we might restrict UBage
*to minimize and control Ate ^concentration in nature to acceptable
levels.
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'However,-the use .of'Aroclor-1248, 1254 and 1260 would eeem to , require further restrictions 'ln exposed systems.
. ?*-Yr*Scott *Tucker-reported"^that. Aroclor 1242 could be jdestroyed by *
. HHOa/SaSO^ treatment; Widmark may o r may not have "been destroying v -Aroclor* 1242,,before./hiB-analyBiB. :
We could also expect that Clstf might go undetected based on.
Widmark* b ^evidence; and apparently chlorinated-paraffin and
chlorinated terphenyl have .so f a r ;escaped -detection or are ab
sent in the tissues of birds or fish..
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Again, Keller and Wheeler should have a more complete report.
ms iWlira<ii
W. R. Richard r f a V - J . v v :hv *.'r
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