Document XR1xxNja3eOYy5m1vMDryZ9Gy
AR226-2000
GC: J. T. SMITH
*-69 RV_fJ/8l
J. H. TODD
; <^m> ESMUSHEiaoa
E. I. du Pont de Nemours El Company
JNCORPOftATED
H. E. SERENBETZ R. D. INGALLS
D. P. GLEASON . D, R. HARKEY J. J. HEGENBARTH
Wilmington, Delaware 19898
M. A..SM&JK H. V./^W^IEEY - WASH. WKS.
POLYMER PRODUCTS DEPARTMENT
B. W. KAERH - ER
R. R. BONCZEK - ADMIN.
TO: J. C. BESPERKA
O ctober 21, 1983
FROM: J, W. RAINES
*v'/A"
C-8 ENVIRONMENTAL' STATUS
J pfL
I
Yesterday I reviewed the environmental ouauuo ux otro for you, Dr B. W. Karrh R. R. Bonczek, J. J. Hegenbarth and
. . Serenbetz. Attached is a set of the charts I presented.
Summary
1. We have C- 8 under control in the work environment, 2 . Employee blood concentrations are coining down.
3 ` S ec!aare n knOWn medical problems resulting from exposure
Sri ^ f Ci?rged to,the river w i l 1 be drastically reduced by ? S Sw u UtinS a telmer B sulfonic acid (TBSA) for C-8 in 7 ioRAFEPAPrCeS? ` Gal date is the first r second quarter 1984. Appropriate toxicity tests on TBSA are under way.
rt?arepnaWaS exp?essed at,out air emissions of C-8 , the fact nnkonSi a!raumulates the blood and that the future is p r o S e d a g r e e d that engineering analyses would proceed expeditiously on two alternatives (at least through preliminary evaluation) for eliminating air emissions. g
Also a toxicity review will be conducted on a class of
Sitipd1^ ^ hidridr (RfH> whlch ^ i l be generated and process changesattnosPBere as a result of ^ p r o p o s e d
6.
I will people
follow progress informed.
on
the
studies
and keep
interested
JWR: ldr/Attachment
Better Things For Better Living...from Du Pont
AJP002371
EID079740
C-8 ENVIRONMENTAL STATUS
History
Industrial Hygiene
Engineering Changes
Protective Equipment
Air Monitoring Blood Sampling
Long-Term and Short-Term Employees New Hires
|
: |
\
j f
C-8 Material Balance Off-Plant Disposal In Product To River To Atmosphere Ground Level Modeling Results
ENVIRONMENTAL ALTERNATIVES
FEP Replace C-8 - C7F1 5 CO2NH4 With TBSA - RfCH2CH2S03H
Fine Powder
No Known Substitute
Two Expensive Alternatives
- Scrubbing of Vents
- Conversion to Presumed Innocuous Compound
^7^15
400C Heat *
CyFj^H + C02 + NH3
JWR:ldr/10/19/83 aNs
EID079741
AJP002372
8/51 6/27/78
6/12/79
8/13/79 9/79
11/12/79
C-8 REVIEW . HISTORY
*.
IN DISPERSION POLYMERIZATION, `
FEW PRECAUTIONS IN HANDLING.
:
EMPLOYEES THAT 3M FOUND ELEVATED ORGANIC r.LHnnl!!TLEVELS IN BLOOD 0F WORKERS EXPOSED TO RSI?TU!AKTIOSN.ED SURFACTANTS. WE WOULD REVIEW OUR
ADVISED EMPLOYEES THAT THE REVIEW WAS COMPLETE
ciI!D?2cP.R??.rFMS F0UND* As AN ADDITIONAL STEP
TMCH2ECTMKEHD*E LEVELS IN SOME EMPLOYEES WOULD BE
.
COMMUNICATION ADVISED EMPLOYEES THAT SOME OF 8 FrPVA2nSn D p L ^ B2?AORIANS SAMPLED- IN JUNE HAD EWOEREK*EARJSE.D MORE SAMFPLLE0RS1NWEOULLDEVEBLESTSAKIEMNI.LAR TO 3M
PROVISIONAL AEL ESTABLISHED.
COMMUNICATION ADVISED RF.SHITS of 7 Rinnn
USAMPLES FROM MONOMER OPERATORS AND
*
rh20P0LYMERS RESEARCH PERSONNEL WERE LOWER THAN
FOR P E K W M E L IN POLYMERIZATION OPERATIONS.
? w TM f L ? F,,MEDICAL RECORDS SHOWED "NO CONCLUSIVE
EXPOSURE TO CE8"TH PR0BLEMS ASSOCIATED WITH
AJP0Q2373
ID 079742
*
.K\i .
j)
3/01/80
3/20/81
4/01/81 4/10/81 7/31/81 12/15/81 3/01/82 5/17/82 7/06/82 JWRrldr 10/19/83
Communication Summarized Program:
Define areas where engineering changes will reduce C-8 exposure. Authorize COD's,
Define areas where protective equipment will be needed.
Continue blood sampling program.
Continue to evaluate liver tests of employees with potential exposure.
3M advised Du Pont that C-8 caused birth defects in the unborn when fed by stomach tube to female rats in a laboratory experiment. As a result all female employees with potential C-8 exposure were promptly transferred to other areas.
Communication about birth defects concern
Communication about use of C-8 specific M n n i analysis. Results increased 28% average.
Communication concemine expansion of hlooH sampling and air sampling programs.
Communication about new data which note nn>^=,l 5m .analysis in doubt.
Communication that studies are complete which find C-8 not to be a teratogen and no evidence of adverse health effects. Female and blood donation exclusion recommendations recinded.
Final AEL established.
Communication that based on C-8 findings the Diooa sampling program would be reduced to only those directly exposed.
EID079743
AJP002374
ENGINEERING CHANGES
Equipment Seals and Gaskets Better Leak Maintenance Overall Building Ventilation Study Building Exhaust Fans Building Pressure Balance Ventilated Hoods Over Dryer Doors Increased Vent Stack Height Eliminated Dusty Jobs Major Cleanup of Area New Torus Disc Dryer
Protective Equipment Comfo Half Mask Respirators Breathing Air Respirators Latex Rubber Gloves
JNRrldr 10/19/83
EID079744
AJP002375
TRENDS'TO C-8 IN AIR LEVELS
FEP Area (Composite Avg.)
1980 1.87
C~8 In Air (mpb) AEL - 0.56
1981
1982
0.32
Not Calculated
1983 0.15
FEP Wet Finishing Operator 0,95 0.30
0.09
0.11
FEE - No, 1.Clean Room No, 2 Clean Room
6.80 3.11
3.54
0.19
Fine Powder Dryer Operator 1.40 0,56
Fine Powder Dryer Room (Composite Avg,)
3.00 2.47
0.15 0.37
0.06 0.23
JWRtldr 10/19/83
AJP002376
EID079745
TEFLON' FINE POWDER/DISPERSION OPERATORS C-8 BLOOD SAMPLE RESULTS
C-8 in Blood (ppm)
First Sample
Second Sample
Change
26,0
20.0
**6 , 0
24.0 11.0
25.0 8.2
+1 . 0 -2 , 8
9.4 7.9 -1.5. 8 . 2 6.5 -1.7
7.0 7.7 +0.7
6.9 5.9 -1 . 0
5.6 4.2 -1.4
4.4 4.9 +0.5
4.3 5.6 +1.3
3.9 3.6 -0.3
3.6 2.7 -0.9 3.5 2 . 1 -1.4
2.9 2 . 8 -0 . 1 2,8 2.8 0.0 2.6 2.4 -0 .2 2.5 1 . 8 -0.7
2.5 2.5 0.0 2 . 1 1 . 6 -0.5 1 . 6 1.5 -0 , 1 1.5 1 . 2 -0.3
1.3 1 . 1 -0 .2
JWR;ldr/10/19/83
Days Between Samples
363 364 391 364 363 364 337 334 365 401 364 362 363 357 365 391 336 349 288 384 366 362
% Per Year
Change -23 +4 -24 -16 -21 +10 -16 -27 +13 +27 -8 -25 -40 -3 0 -7 -28 0 -30 -6 -20 -15
AJP002377
EID079746
TEFLON FBP OPERATORS C-8 BLOOD SAMPLE RESULTS
C-8 in Blbod (ppm)
First Sample
Second Sample
Change
Nl
Ul
6.6 -.9
4.5 3.7 - . 8
3.1 2 . 8
-.3
2 . 1 1.5 - . 6
1 . 8 1 . 1 -.7
1.8 1.6 -.2
1 . 6 1.4 - . 2
1.25 1,20 0.95 0.86 0.75 0.52
1.20 1.00 0.79 0,75 0.72 0.44
-.05 -.2 -.16 -.11 -.03 -.08
0.51
0.48
-.03
0.42 0.41
0.39 0.46
-.03 +.05
0.38
0.36
-.02
Days Between Samples
362 380
384 364 364 392 393 171 333 391 565 364 365 337 445 363 363
% Per Year
Change [ -12
1 -17 i ; -9
j -29
-39 -10 -12
-9 -18
-7 -8 -4
-15 -6 -6
+12
-5
JWRrldr/10/19/83
AJPG02378
EID079747
SHORT SERVICE OPERATORS C~8 BLOOD SAMPLE RESULTS
Fine Powder
Last Sample
PPM .02 .19 .93 4.00
Days in Job
61 212 375
603
PPM Per Year Gh'abke +.09 +.24 +.03
-.18
FEP
.05
.15 .05 .23 .66
i Uol
95 124 135 165 492 266
+.15 +.10 +.38 +.09 + .24 -.24
AJP002379
JWR:ldr 10/19/83
EID079748
MEW HIKES - TEFLON
Date of First Sample
07/28/81
10/01/81
10/07/81
10/13/81
Date Hired
07/27/81
08/03/81
04/20/81
04/20/81
C-8 Blood Level (ppm)
<0,007
0.009
0.007
0.015
Months on Plant Before First
C~8 Blood Test
0
2
5 1/2
5 3/4
AJP002380
JWR:Idr 10/19/83
EID079749
C-8 BALANCE 1983 NO. 1 FINANCIAL FORECAST BASIS
M LBS. FINE FEP POWDER DISPERSION GRANULAR
LBS. TOTAL
20.5
1.2
--
.1 RIVER
21.8
1.8* 10.4
--
.2 ATMOSPHERE
12.4*
.2 --
4,5 -- PRODUCT
4.7
.3 . . . .
4.2
OFF-PLANT DISPOSAL 4 6
22.8* 11.6
8.7
.3
43.4*
% OF TOTAL
50 28 11 11 100
INCLUDED IN THESE NUMBERS IS APPROXIMATELY 1 5M LBS OF
C-8 ENTERING THE HUMID HEAT TREATING OVENS WHERE IT IS
THERMALLY CONVERTED TO C7F15H.
1
AJP002381
0A5/n sw 2129W-6
10/11/83 EID079750
C-8 I N RIVER
1983 Forecast to River
- 21,800 lbs.
Average Ohio River Flow
" 13.88 Billion lbs./Hour
Concentration
* .00018 ppm
C-8 Ingested with 1 Liter/Day - .00000018 gm.
8 Hour AEL Via Inhalation
- .0001 gm.
Or .18% of AIL Pose
AJP002382
JWR:ldr 10/19/83
EID079751
WASHINGTON WORKS O '3 NNUAL M E A N CONCBN 77P/9T/ A I
CASE 2
8EZOOdfV
E ID 079752
'ENVIRONMENTAL ALTERNATIVES
FEP
Replace C-8 - C7F1 5 CO2NH4 With TBSA - RCH2 CH2S03H
.
Toxicity - Appears To Be Less Toxic Than C-8
Blood Accumulation Similar to C-8 - Not Present as C-8 Developing A Specific Test For Material in Blood
Fate In Process Converted to RfH - Presumed to be Nontoxic
Process Development Status Plant Test in November
Substitution Timing First or Second Quarter 1984
AJP002384
JWR: ldr 10/19/83
EID079753
ENVIRONMENTAL ALTERNATIVES' (coht ,d'l
Fine' P'otoder No Known Substitute
Scrubbing of Vent Not Economically Feasible - Dryer Pressure Balance is Critical - Low Concentration in Vent (60,000 pph of air) Foaming Limits Water Concentration - Don t Want to Send Scrubber Effluent to River
Natural Gas Heated Furnace
Investment Annual Operating Cost
$ 1 ,2MM $.3MM
Toxicity Tests and Blood Data Needed
JWR-.ldr 10/19/83
EID079754
