DuPont Company PFOA in Blood Serum Dordrecht Works, Netherlands 2005 Samples PFOA. Job lppb) Job FEP personnel 3209.0 PTFE operator 1262.5 FEP personnel . 4111.0 PTFE operator 2056.7 FEP personnel 636.5 PTFE operator 1883.0 FEP personnel 2954.9 PTFE operator 3774.7 FEP personnel 902.4 PTFE operator 3800.0 Count 5 PTFE operator 3102.0 Average 2362.8 PTFE operator 4418.5 Median 2954.9 PTFE operator 2922.5 Minimum 636.5 PTFE operator 3978.0 Maximum 4111.0 PTFE operator 2 104.0 Dev 1519.5 PTFE operator 1768.0 Maintenance Workers 1190.0 PTFE operator 802.4 Maintenance workers 2548.5 PTFE operator 2282.0 Maintenance workers 1391.5 PTFE operator 1882.0 Maintenance workers 529.5 PTFE operator A 2977.7 Maintenance workers 1080.2 PTFE operator 2718.7 Maintenance workers 1209.7 PTFE operator 5634.0 Maintenance workers 1296.1 PTFE operator 2856.5 Count 7 PTFE operator 609.9 Average 1320.8 PTFE operator 3415.4 Median 1209.7 PTFE operator 3658.5 Minimum 529.5 PTFE operator 4664.7 Maxlmum 2548.5 PTFE operator 2985.0 Dev 609.1 PTFE operator 3322.4 Others( engineers/lab people) 3253.0 PTFE Operator 519.8 Others engineers/lab people) 75.5 PTFE operator 2619.7 Others engineers/lab peopte) 262.9 PTFE operator 1132.2 Others engineers/lab peopte) 11387.0 PTFE operator 1979.1 Others engineers/lab peopte) 417.9 Count 28 Others engineers/lab peopie) 565.3 Average 2683.2 Others engineers/lab people) 601.2 Median 2787.6 Others engineers/tab people) 312.0 Minimum 519.8 Others engineers/tab people) 406.1 Maximum 5634.0 Others engineersrtab people) 134.7 Dev 1255.3 Others engineers/lab people) 446.4 Total Populataion Others engineers/lab people) 416.1 Count 52 Count 12 Average 2201 .3 Average 1523.2 Median 1931 .1 Median 417.0 Minimum 75.5 Minimum 75.5 Maximum 11387.0 Maximum 11387.0 Dev 1907.5 Dev 3219.1 Analysis by Medizinisches Labor Brernen. Bremen, Germany March 13, 2006 LOG 10 Barbara J. Dawson, CSP 003?0029m0001 501 DuPont Company . PFOA in Blood Serum Dordrecht Works, Netherlands Changes over time in workers with 2005 Samples -- -. . 7* . 8159574 1200111,", 1139501121993: 3191911392095 . . Nettie"; . .. a; =15 (913.791.7357.: (fish)? 1: "(twat 29.05;" 1? FCO'mmen'tIS A Te?on polymer operator 1264 2057 793 Te?on polymer operator 1000 402 1883 1481 Te?on polymer operator 4500 972 4418 3446 Te?on polymer operator 1148 3253 2105 A no exposure for 2 years due Te?on polymer operator 397 262 ?135 to job change Teflon polymer operator 754 2978 2224 was active in Te?on clean- Teflon polymer operator 13900 5634 out team prior to year 2000 Teflon polymer operator 1600 621 2856 2235 Teflon polymer operator 1136 3415 2279 Teflon polymer operator 979 1979 1000 Teflon polymer operator 1400 2620 Average 4480 853 2850 1714 Median 1600 972 2856 Minimum 1000 397 262 Maximum 13900 1264 5634 Standard Deviation 5446 324 1406 Maintenance - 800 872 1190 318 Maintenance 1506 2548 1042 Maintenance 1110 1391 281 Maintenance 441 1296 855 Average 800 982 1606 624 Median 800 991 1344 Minimum 800 441 1190 Maximum 800 1506 2548 Standard Deviation Service section 38 75 EP operator 3476 3209 -267 FEP operator 4500 4111 1391 FEP operator 2640 2955 315 FEP operator . 823 902 79 Average 4500 2313 2794 380 Median 4500 2640 3082 Minimum 4500 823 902 Maximum 4500 3476 4111 Standard Deviation 0 1356 1356 n= 1 3 4 Analysis by Medizinisches Labor Bremen, Bremen, Germany LOO 10 March 13, 2006 Method changed in 2002 Barbara J. Dawson Results shown for workers sampled in 2005 who had previously been sampled Page 5 of 10 003?0029?0001 502 DuPont Company PFOA in Blood Serum Dordrecht Works, Netherlands Changes over time in workers with 2005 Samples i. . i 3 jSxi'ii -. Na'me? - . lab technician doing most of APFO analysis- checked working method/procedures Lab technician 10 000 1.138? after 2005 high result Lab technician 313 601 .. - 1 moved from project engineer C8 recovery to day Engineer 950 418 function Total Population Average 3188 1109 2671 1562 Total Population Median 1400 922 2548 Total Population Minimum 38 313 75 Total Popuiation Maximum 13900 3476 11387 Total Population Standard Deviation 4320 820 2369 n: 9 17 23 Analysis by Medizinisches Labor Bremen, Bremen, Germany LOO 10 March 13, 2006 Method changed?in 2002 Barbara J. Dawson Results shown for workers sampled in 2005 who had previously been sampled Page 6 of 10 003?0029?0001 503