Document mG8a3o7Vnn6g9pEBnZKZYknO

M XG _ lf-s l 55 > 0045l * POLYMER PRODUCTS DEPARTMENT MANUFACTURING DIVISION AR&6-ifSl March 19, 1990 TO: J- G. LOSCKIAVO - FIBR - SPRUANCE R. 0. LANYQN - PPD - WASHINGTON WORKS W. E. CRAWLEY - PPD - WASHINGTON WORKS FROM: H. A. SMITR REVIEW OF WASHINGTON WORKS C-8 DATA PERSONNEL AIR MONITORING AND BLOOD DATA Following is a summary of our meeting and the conclusions reached. Please get back to me with comments as soon as possible. I've attached the package of backup data used at the meeting. C-8 personnel air monitoring data taken over the period April 1988 through September 1989 (220+ samples covering 22 jobs) and all personnel C-8 in blood data going back to 1979-80, were summarized and reviewed. When correlating blood data with air monitoring data by PERS jobs, the only people included in. the blood data base were those who had been in the indicated job for years; had not moved all over the Fluoropolymers area; and are still in the jobs. The task of interpreting the data is complicated by the fact that the air monitoring data is recent whereas the blood data (because of the very slow drop off rate of C-8 in the blood) essentially reflects exposure dating back to the "early days". Following are the conclusions from this review: 1) There is a correlation between C-8 personnel air levels and C-8 in blood levels, and between skin contact and C-8 in blood levels. Table 1 summarizes the blood data/air data/skin contact potential by PERS jobs. It is interesting to note that the jobs that have high C-8 In blood populations and that are not in compliance with the AEL, are those jobs that have potential for C-8 skin exposure. Figure 1 is a plot of personnel air levels for a PERS job code vs. blood levels for the same jobe code. Figure 1 also shows the high blood levels that do not fit the curve which we attributed to skin contact on the part of the specific individuals. 2) Figure I would indicate that exposure at the AEL of 0.56 ppb would equate to a blood level of -3 ppm. 000452 1 Jk J. 6, LOSCHIAVO, ET At 2- - March 19, 1990 3) Background blood levels, for people just working in this area of the plant, are in the 0.1-0.5 ppm range. 4} The effect of skin contact is strong and apparent as demonstrated in Table 1 and Figure 1, especially documented by jobs 08PE, 08PH, 08PF. Skin contact results in blood levels in the 7-8 ppm range or way higher. This position is also supported by 3M and by review of all the other blood plots we have; where some people stand out with very high blood levels. 5) A side observation - people working in a job seem to jump to the blood level for the job and_stay__there. 6) Drop-off rate for C-8 in the blood is a half life of -4-5 years or more. This is based on a very small amount of data on pensioners and on the observation that there is a slight perceived decline in workers in the various jobs. 7) Because of the slow drop-off rate, annual blood testing is telling us nothing. We should discontinue blood testing (unless an employee reguests it) for now and reconsider taking another "snapshot" in a few years after we have completed our process improvements (e.g. use of C-8.in solution). When we elect to do more blood monitoring, we should sample as many workers as possible. We would need the people new to the area as well as the older workers because the older workers would still be on the slow decay C-8 in blood curve. Even at best the data will again be difficult to interpret because of the frequent job-to-job movement of people within the fluoropolymers area and from area to area on the Washington Works site. Other confounding factors that will continue to add to variability are individual work habits and individual biological responses such as excretion rate and retention in body other than in blood (e.g. fat). 8) Eighteen of the 22 PERS jobs were in compliance with the AEL for C-8. Four jobs were out of compliance or marginal- All four jobs involved potential for skin exposure. Use of C-8 in solution should eliminate the problem for three of the four jobs. HAS/is Attachment Hi 000453 Job 08PE Poly Autoclave Operator 08PI Poly Dryer/Environmental Control Operator 18PB FEP Extrasion/Oven Operator Q8PH Poly Dispersion Operator 08PF Poly Polykettle Operator 08PS Granular TA Zone 6 Operator 08PK Granular TA 3rd Floor Operator 18PA FEP Polykettle Operator 68HE * FEP General Day Mechanic ,/iSLE 1 m j mASSESSMENT OF BLOOD VS. P1q o 4 .{Rpm). 95 %'tile Air fppb-l 0.66 Handles C-8 /-Potential for .Skin Exposure Yes* (Data8s.howed two. populations) 2 0.25 No. 0.5 <0.03 (ND) (1 0.88 (7.5 (one person) (Data showed two populations) (2.5 0.27 (8.5 (one person) (Data showed two populations) 0.4 <0.03 (ND) 0.1 -.05 No data No data 5.97 0.58 NO Yes* Yes* No No Yes* Yes AEL Compliance No * Yes Yes Yes Marginal Yes Yes No Marginal 000454 * C-8 in solution use should 1Iminate this problem. Crawley/Lanyon/Loschiavo/Smith - 11/89