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NASH1N5TONWORKS C-8 INDUSTRIAL HYGIENE
WORK RULES, PROTECTIVE CLOTHING, RESPIRATORYPROTECTION, ETC.
LIQUID C-8 AIR MDNITORIN9 BLOOD RONtTORINfi
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WASHINGTONWORKS AIR SAWLIN6 RESULTS
PERSONALSAMPLES
0% - <l0% AEL 10X - <50 AEL SOX - <IOOX AEL 100% AEL TOTAL
1993 W
1995
34
40
18
8
14
14
013010 43
57
32
AREA SAMPLES
1993 50
1994 43
1995 2S
PERS (OOHHS)system used to determine where personal samples are needed.
S12T used to determine sampling frequencies, usually 90, 180, or 360 days.
Area samples have support role, identifying locations where C-a levels are high.
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BLOOD HONITORINS
THIS IS THE ONLY WASURE ME HAVE OF TOTAL EMPLOYEEEXPOSURE
PROBLEMS BIOPERSISTEHCE HAKES DATA INTERPRETATION DIFFICULT
SAMPLING IS INVASIVE LEM6THY ANALYSIS IS RUN BY ONLY ONE LAB NO AEL
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C-8 IN BLOOD - HISTORICAL
1978
2979 1980 1981 1882 1990 1993 1995
Informed by 3K that C-B Is found In the blood of exposed workers
and persists for long time.
C-8 found in blood of DuPont workers,
Workers with blood C-8 found to have normal Birth defects scare additional sampling.
liver
function.
Blood program continues on voluntary basts
no trends noted.
Formal review of blood data.
Journal Of Occupational Medicine First 5-yer -snapshot".
study
of 3M workers.
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1990 C-8 INDUSTRIAL HYGIENE OATA REVIEW (HA Smith. -3G LoseMavo, RD tanyon, WE Crawl ey)
CONCLUSIONS (Recognizing the data limitations)
Thara Is ft correlation between blood and air C-8 levels that Is
'.,
confused by dermal! exposure.
Exposure at the AEL of 0.56 ropb would result In a blood level of about 3 ppm.
Background blood level for the Teflon* area 1s between 0.1 and 0.5 ppnu
-----Dermal-exposure-Is the cause for higher blood levels*
Half Ufa for C-8 In blood 1$ about 4 to 5 years. - ^n^
Annual blood testing Is not useful and should be replaced by "snapshots"' at longer Intervals.
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1995 C-8 IH BLOODSNAPSHOT"
PURPOSES
Nonl.tor the overall effectiveness of our C-8 industrial hygiene
programs.
Create and maintain a continuous data base for epidemlologic: surveillance of our exposed population. Provide closure for Issues raised by the 1990 data review. Honor employee requests for voluntary testing.
TEST POPULATIONS
Employees in C-8 Jobs (82 of 140) Employees not In C-8 Jobs with a previous result >3 ppffl (9 of 12) Pensioners with a high previous result (9 of 19) Volunteers (18)
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RESULTS SUMMARY- OPERATORS
JOB 08PE 08PF 08PH
08PI
08N
OBPN 18PA 18P8 18PC 18PD 1SPJ 18PK
OESCRIPTIOII
autoclave polykettle dispersion FP finishing
FP packout C"8 dryar fecovary
FEP p&lykettla PEP extruder/wen FCP wet finishing FEP packout PFfl/FEP bead FEP safety/disp
1995
AVERAGE (")
2.3 (7) 2.6 (6) 0.5 (2) 2,6 (6) 0.7 (7) 1.7 (Z) 2.3 (4) 1.5 (6) 3.0 (1) 0.1 (4) 0.7 (2) 2.1 (2)
1989
AVERASE (n)
3.0 (4). 7.0 (3) 2.5 (3). 8.5 (1) 1.0 (2). 7.5 (1)
2.0 (6)
0.5 (3)
RESULTS SUMMARY- MECHANICS
58HC 58hQ 58HG 68MA 68KB
FP/dlsp/gran/TA
general shift
procass E&I
general shift
FEP EM
1.4 (1) 1.1 (8) 0.8 (7) 1.1 (5) 0.9 (7)
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OTHER OBSBRVATIQHS
1. VOLUNTEERS a) one of 17 ig above 1 PPM b) Average of other 16 iis 0.4 PPM
2. ACTIVE BMPljOYEES WITH PBEVIOUS HIGH RESULTS
in C-8 job not in C-8 )ob
2 3241 Down
Saine
Up
6
3. THREE EMPLOYEES OVER 3 PPM FOR THE FIRST TIME
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PATH FORWARP
Finish Data Analysis
Employee Communication
Site Industrial Hygiene Efforts
Toxicology Work (Do we need a BEI?) Continue Annual Voluntary Testing Take Another Snapshot In 2000
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