Document 0gE4VjJ8REk0GEgwBL7jgRj6n
*. , rc*T(oN.i<,W. R. Richard - Research Center
HATS VJCCT(
1
,, TO . :
May 15, 2.969
..
AROCLOR - ANALYSIS IN PESTICIDE
RESIW
(Visit to' Prof. 0. Widmark .
U, of Stockholm - May 5# 2.969)
Pile
.
.`
* -.
.
.
,
' ''
' '
ft. Keller
A-Lab
`E. Wheeler
EWHEE
E, Tucker
Res.
H. Bergerr .
HBERQ
D. Olson
DOLSO
W, Kuhn
WKUHN
R, Kountz
RKOUN
R, Davis
RDAVI
' ' P. Benignus/j. BryantpBENl
J. Fallon
JFALL
Q. Thompson
QTHOM
R, Weiss
RWEIS
L. Stark
LSTAR
J., Springate
JSPRI
^^M'. Farrar
Res, 3
W, Waychoff
WWAYC
C, Paton
. CPATO
R, Baxter -
RUABON
\ , * . ** ' 1 Widmark was finding
. ,
Cl and Cl chlorinated biphenyls from extraction of.salmon and
from
e xtraction
of
.
wa st*e
sewage
s*l*udge.
.
......
. low-and Cl;hlorinated biphenyl.
Ai- ` -
:Some Clio
$1 l' . . J > v' -.
' ''No Cl&i.;and C1&8:;W'. .H '
'
i. ^his-eorresponds'rough'ly' t'OC/iCL lophen 50' ' or Ar' o' clor 1254,'
' '
''' .
r
k?V*The isomers' round in nature Wire: .'not", the same ratios as in either rAroclor
|`'f:3L254. or Clophen 50... . ;*.*- vJ;
'' '
. 1
"'-Widmark :.has examined 2000 samples from the Salticj^eja. v Another '.group -of
v geologists is examining the aea around Scotland,'''':.'.Tltieir>re6ult8 are a ,
bit different according to .Widmark',s -knowledge;
_
< *' .
. : "
.'a. Widmark had been in contact' with transformer manufacturers (in Sweden, - *
They reported very low loss'of chlorinated biphenyls,. an occasional ;5plli.
.Widmark kept hitting at marine paints as';a source of .the product,.
'
He wanted Monsanto to restrict sale to those closed system applications.
He asked if the economic value of PCS*s was worth the bad publicity which
would come to Monsanto, . :.
.
We countered with a question. What products would he recommend as sub
stitutes? What kindB of synthetic compounds are biologically acceptable?
Would he help establish a safe tolerance level of synthetic compounds In
Wild-life?
jmmmmmmmmmmm
, .
,*
.
. >, * .
NEV
' . *',*; > > .. ,.,`j :5,`` t .< ^ ,
029677 742928
WATER PCB-00049843
r
*
. .
.
H 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
; i more biodegradable; (or it could be due to the analytical isolation
| and separation methods; or perhaps Aroclor 1242 is less exposed in the
! world.} '
.
* Widmark Is dedicated to better and more accurate analysis. He is in ' sympathy with most of the ecologists demanding elimination of chlorinated
, pesticides. His knowledge of scientific evidence and. its requirements ' makes him slightly hesitant in condemning Aroclor Itself or demanding
' its total eclipse.
Keller and Wheeler should have a more complete report.
Widmark reported not finding chlorinated naphthalene, chlorinated paraffin, chlorinated benzene, chlorinated terphenyl. He thought he had identified and accounted for 80# or more of the lipid soluble extractable chlorine
containing compounds,
. '.
Based: on these remarks of Widmark we might consider alternate products
'and actions.
'
.
What is the Clg and Cl content of Aroclor 1242?
... ,,
....
!
The Aroclor 1242 has
dichloro,
I,:' ,.' '
.
55$ trichloro
( . ' \
`
.tetrachloro
., ./
. -
.
The cig content, inust be very ..low in our present material.
-~
- Aroclor 1242 is Indeed biodegradable we might restrict usage
to minimize and rfiontrol its concentration in nature to acceptable
V. levels.
: V:\.,
\':-S
r
' " !
1
, V ''
-'
.
. ''
w`
*_
**
'"'.However, the us of Aroclor 1248, 1254 and 1260 would seem to
-require further 'restrictions in exposed systems.
/' -Scott Tucker reported that Aroclor 1242 could be destroyed by
. HNOs/fceSO* treatment. Widmark may or may hot have "been destroying
. Aroclor 1242 before his analysis. :
.' -
We could also expect that Clstf might go undetected based on, ` .
Widmark's evidence; and apparently chlorinated paraffin and
: chlorinated terphenyl have-so far escaped detection or are ab
. sent in the tissues of birds or fish.
.-
Again, Keller and Wheeler should have a more complete report.
L ms
W. R. Richard
NfcV 02967a
742929
WATER PCB-00049844