TEFLON FINE POWDER/DISPERS ION OPERATORS C-8 BLOOD SAMPLE RESULTS /(*lO C-8 in Blood (ppm) First Sample Second Sample Change 26.0 20.0 -6.0 24.0 25.0 +1.0 11.0 8.2 -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 CM o 2.6 2.4 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 000246 % 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 EID079746 TEFLON FEP OPERATORS C-8 BLOOD SAMPLE RESULTS C-8 in Blood (ppm) First Sample Second Sample Change 7.5 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 -.05 1.20 1.00 -.2 0.95 0.79 -.16 0.86 0.75 -.11 0.75 0.72 -.03 0.52 0.44 -.08 0.51 0.42 0.41 0.48 0.39 0.46 -.03 -.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 -17 -9 -29 -39 -10 -12 -9 -18 -7 -8 -4 -15 -6 -6 +12 -5 JWR:ldr/10/19/83 V 00024V 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 Change + .09 +.24 + .03 -.18 FEP .05 .05 .15 .23 .66 o U1 95 124 135 165 492 266 + .15 + .10 +.38 + .09 + .24 -.24 JWR:ldr 10/19/83 00248 EID079748 NEW HIRES - 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 000ZA9 EID079749

y}R,6_ 3W* 000410 RUM- TEFLON FINE POWDER/DISPEKSION OPERATORS C-8 BLOOD SAMPLE RESULTS C-8 in Blood (ppm) First Sample Second Sample Change 26.0 20.0 -6.0 24.0 25.0 +1.0 11.0 8.2 -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 4.3 ; 3.9 4.9 +0.5 5.6 +1.3 3.6 -0,3 3.6 2.7 -0.9 3.5 2.1 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:Idr/10/19/83 Bays 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 000411 TEFLON FEP OPERATORS C-8 BLOOD SAMPLE RESULTS C-8 in Blood (ppm) First Sample Second Sample Change 7.5 6.6 -.9 4.5 3.7 - A 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 -.05 1.20 0.95 1.00 0.79 -.2 -.16 0.86 0.75 -.11 0.75 0.72 -.03 '*i o 00 0.52 0.44 0.51 0.48 -.03 0.42 0.39 -.03 0.41 0.46 +.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 o p-i a % Per Year Change -12 -17 -9 -29 -39 -12 , -9 -18 -7 -8 -4 -15 -6 -6 +12 -5 JWR:Xdr/10/19/8.3 000412 SHORT SERVICE OPERATORS C-8 BLOOD SAMPLE RESULTS Fitie Powder Last Saoule PPM .02 .19 .93 4.00 *** FEP Days in Job 61 212 375 603 .05 95 .05 124 .15 135 .05 165 .23 492 .66 266 PPM Per Year Change +.09 +.24 +.03 - .18 +.15 +.10 +.38 +.09 +.24 -.24 JWRldr 10/19/83 000413 HEW HIRES - TEFLON Date of First Sample 07/28/81 10/01/81 10/07/81 10/13/81 Date Hired 'C-8 Blood Level (ppm) 07/27/81 <0.007 08/03/81 0.009 04/20/81 0.007 04/20/81 : 0.015 Months on Plant Before First -8 Blood Test 0 2 5 1/2 5 3/4 JWR:Idr 10/19/83 000414

TEFLONe FEP OPERATORS : -8 BLOOD SAMPLE RESULTS C-8 in Blood (ppm) SFaimrpslte SSaemcpolned Change 7.5 6.6 -.9 4.5 3.7 -.8 3.1 2.8 -.3 2.1 1.5 -.6 1.8 11 -7 1.8 1.6 -.2 1.6 1.4 -.2 1.25 1.20 -.05 1.20 1.00 -.2 0.95 0.79 -.16 0.86 0.75 -.1 0.75 0.72 -.03 0.52 0.44 -.08 0.51 0.48 -.03 0.42 0.39 -.03 0.41 0.46 +.05 0.38 0.36 -.02 Days BSeatmpwleeesn 362 380 384 364 364 392 393 1m 333 391 565 364 365 337 445 363 363 % CPhearnYgeear -12 -17 -9 -29 -39 -10 -12 -9 -18 -7 -8 4 -15 -6 -6 +12 -5 JWR:1dr/10/19/83 2 g ~ 000227 EIDO079747 SHORT SERVICE OPERATORS C-8 BLOOD SAMPLE RESULTS Fine Powder Last Sample PPM 02 .19 93 4.00 FER .05 05 215 .05 .23 66 Days in Job 61 212 375 603 95 124 135 165 492 266 PPM Per Year Change +.09 +.24 +.03 -.18 +.15 +.10 +.38 +.09 +.24 -.24 JWR: 1dr, 10/19/83 g Ss 8 000228 EID079748 NH EW IR-TEEFLS ONe 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 51/2 5 3/4 JWR: ldr 10/19/83 . 000249 5 g EID079749

Continue blood sampling program.

EID091343 7/06/82 Commnication that based on C-8 findings the blood sampling program would be reduced to only those directly exposed.

All blood samples were analyzed by the C-8 specific method.

siotf ARR_ R Ju6 y3 i a7 000410 : ~oD ARRRG - 3442 TEFLONe FINE POWDER/DISPERSION OPERATORS C-8 BLOOD SAMPLE RESULTS | | | i " AY BD C-8 in Blood First Sample Second Sample 26.0 20.0 24.0 25.0 11.0 8.2 9.4 7.9 8.2 6.5 7.0 7.7 6.9 5.9 5.6 4.2 iss rx 4.3 5.6 3.9 3.6 3.6 2.7 3.5 2.1 2.9 2.8 2.8 2.8 2.6 2.4 2.5 1.8 2.5 2.5 2.1 1.6 1.6 1.5 1.5 1.2 13 1.1 (ppm) Change 6.0 +1.0 -2.8 to-L5 -17 +0.7 1.0 ~1.4 0.5 +1.3 ~0.3 ~0.9 ~1.4 -0.1 0.0 0.2 -0.7 0.0 0.5 -0.1 -0.3 -0.2 JWR:1dr/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 + ~24 -16 -21 +10 16 -27 .

RECVCIO 000418 j-h-h - 9vW IP TABLE 1 TEFLON FINE POWPER/DISPERSIOK OPERATORS C -8 BLOOD SAMPLE RESULTS DATE OF C-8 IN FIRST BLOOD- SAMPLE jiffC^l- DAYS IN JOB AT SAMPLE DATE DATE OF SECOND SAMPLE C-8 IN BLOOD (PPM) DAYS IN JOB AT SAMPLE BATE 1 / W w( 2/18/82^ 1Q/8/81 8/7/81*'*' lO / l/ sT ** , 2/11/!

(See Exhibit F) wontsoss 1 000002 Richard Hefter January 26, 2004 Page3 9. 5/6/81 - DuPont Memo Re: Proposal To Lower Acceptable C-8 Blood Level To 0.004 ppm (4 ppb) (EID096478-80) 10. 5/14/81 - DuPont Washington Works C-8 Blood Results (EID713817-19) (names redacted); 11. 5/14/81 - DuPont Chambers Works C-8 Blood Results (EID713820) (name redacted); 12. 5/14/81 - DuPont Charts Re: C-8 Blood Testing Results (EID090084-5); 13. 5/15/81 - DuPont CR&D Haskell Laboratory C-8 Blood Results (EID713821-2) (names redacted); 14. 5/19/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713827-9) (names redacted); 15. 5/19/81 - DuPont Washington Works C-8 Blood Results (EID713825-26) (names redacted); 16. 5/19/81 - DuPont Washington Works C-8 Blood Results (EID713823-4) (names redacted); 17. 5/20/81 - DuPont Washington Works C-8 Blood Results (EID713834-5) (names redacted); 18. 5/20/81 - DuPont Chestnut Run C-8 Blood Results (EID713832-3) (names redacted); 19. 5/20/81 - DuPont Circleville, Ohio C- Blood Resulis (EID713836-7) (names redacted); 20. 5/20/81 - DuPont Fairfield, Connecticut C-8 Blood Samples (EID713830-1) (names redacted) 21. 5/21/81 - DuPont AJAX, Ontario C-8 Blood Samples (EID713838-9) (names. redacted); 22. 6/5/81 - DuPont Memo Re: Program To Monitor Level Of Organic Fluorine (Measured As C-8) In Blood (EID00707-9); wotsoss 1 000003 Richard Hefler January 26, 2004 Page 4 23. 7/13/81 - DuPont Mechelen, Belgium C-8 Blood Results (EID713842-3) (names redacted); 24. 7/13/81 - DuPont Photo Products Rochester, New York C-8 Blood Results (EID713840-1) (names redacted); 25. 7/16/81 - DuPont Washington Works C-8 Blood Results (EID713849-50) (names redacted); 26. 7/16/81 - DuPont C-8 Blood Resuls Reported To Wilmington, Delaware (EID713844-6) (names redacted); 27. 7/16/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713851-3) (names redacted); 28. 7/16/81 - DuPont Photo Products Brevard, North Carolina C-8 Blood Results (EID713854-5) (names redacted); 29. 7/16/81 - DuPont Dordrecht, Netherlands C-8 Blood Results (EID713847-8) (names redacted); 30. 7/20/81 - DuPont Washington Works C-8 Blood Results (EID713856-7) (names redacted); 31. 7/24/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713858-9) (names redacted); 32. 7/28/81 - DuPont Fairfield, Connecticut C-8 Blood Results (EID713860) (name redacted); 33. 731/81 - DuPont Memo Re: C-8 Blood Sampling Program (EIDS10244-51); 34. 8/7/81 - DuPont Memo Re: C-8 Blood Sampling Program (EID079552-3); 35. 8/19/81 - DuPont Blood Results Reported To Wilmington, Delaware (EID713861-2) (names redacted); 36. 821/81 - DuPont Washington Works C-8 Blood Results (EID713863-5) (names redacted); Wontaten1 000004 Richard Hefter January 26, 2004 Page S 37. 827/81 - DuPont Chart Re: C-8 Blood Result-s Chambers Works, New Jersey (EID110665); 38. 9/1/81 - DuPont Memo Re: Communication OfC-8 Blood Results To DuPont Chambers Works, New Jersey Employees (EID110659-64); 39. 9/8/81 - DuPont Washington Works C-8 Blood Results (EID713866-8) (names redacted); 40. 9/15/81 - DuPont Memo Re: Proposed DuPont C-8 Blood Sampling Program For Employees At Shimizu, Japan (EID079371-5); 41. 9/81 - DuPont Memo Re: C-8 In Blood Transparencies (EID080743-7); 42. 9/29/81 - DuPont Washington Works C-8 Blood Results (EID713869-71) (names redacted); 43. 10/6/81 - DuPont Washington Works C-8 Blood Results (EID713872-4)(names redacted); 44. 10720/81 - DuPont Washington Works C-8 Blood Results (EID713875-6) (names redacted); 45. 10/27/81 - DuPont Washington Works C-8 Blood Results (EID713877-9) (names redacted); 46. 11/3/81 - DuPont Washington Works C-8 Blood Results (EID713880-82) (names redacted); 47. 12/1/81 - DuPont Memo Re: C-8 Blood Levels In Females Transferred Out Of `The Teflon Divisions: Washington Works (EID0S0677-92); 48. 12/2/81 - DuPont Washington Works C-8 Blood Results (EID713883-5) (names redacted); 49. 12/2/81 - DuPont Circleville, Ohio C-8 Blood Results (EID713886-7) (names redacted); wortsosn1 000005 Richard Hefter January 26, 2004 Page 6 50. 1/6/82 - DuPont Washington Works C-8 Blood Results (EID713888-90) (names redacted); SI. 1/18/82 - DuPont Washington Works C-8 Blood Results (EID713891-3) (names redacted); 52. 2/19/82 - DuPont Memo Re: Trends In Blood C-8 Levels For Various Teflon Operating Groups: Washington Works (EID079349-52); 53. 4/5/82 - DuPont Memo Re: Blood Tests - Employees Potentially Exposed To C-8 (EID096456); 54. 5/12/82 - DuPont Memo Re: 3M Method For Analysis Of Blood Serum For C-8 (EIDO72179-81); 55. 5/12/82 - DuPont Memo Re: Fluoride In Blood Related To HFPO (EID096455); 56. 7/6/82 - DuPont Memo Re: C-8 Blood Sampling Program (EID0S7880); 57. 7/14/82 - DuPont Memo Re: Trends In Blood C- Levels For Various Teflon Employee Groups (EID079049-57); 58. 7/14/82 - DuPont Memo Re: C-8 Air And Blood Sampling (EID082729-31); 59. 7/29/82 - DuPont Memo Re: RetentionOfC-8 In Blood Of Teflon Employees (EID079294-6); 60. 8/6/82 - DuPont Memo Re: Retention Of C-8 In Employees' Blood (EID080662); 61. 8/6/82 - DuPont Memo Re: C-8 Blood Sampling Program (EID0S0657); 62. 825/82 - DuPont Memo Re: C-8 In Human Blood (EID072164-6); 63. 9/28/82 - DuPont Memo Re: C-8 In Blood Of Teflon Employees (EIDO80637-44); 64. 10/7/82 - DuPont Memo Re: C-8 Elimination Rates (EID080633); 65. 11/1/82 - DuPont Memo Re: C-8 Blood Sampling Results (USEPA10530-1); wortsosn1 900006 Richard Hefter January 26, 2004 Page 7 66. 3/4/83 - DuPont Memo Re: Proposed C-8 Blood Testing (EID096447); 67. 8/11/83 - DuPont Memo Re: Update On C-8 Blood Sampling Program (EID079277-81); 68. 9/21/83 - DuPont Tralee Park C-8 Blood Tests Results (USEPA10528-9) (names redacted); 69. 10/17/83 - DuPont Notes Re: C-8 Blood Te

BLOOD SAMPLING RESULTS (Attachment III) through MayAtt1a4.ched is a summary of sampling results available the dispersAisonexpiesctbeedingfroumsedpreavreiouisndiscaamptliinngg,iowsitbelsoodwhelreevelosn.ly results areSamavpalielsabflre,om wDeorwdirlelchtbearaeblejustot cboemipnagrerectehiivsedp.iantW,henwhere ednicree.ct exposure to C-8 is possible, with Washington Works' experiWashingtonWeWoruknsderasretanbdeintghatdissctursasteedg.ies for further sampling at "W.AD.BINGAELSle MEANNEURFGAYCT&UREINNVGIRODNIMVEINSTIAOLN AFFAIRS Attachments EID090077 g 000160 1" cam ei E. 1. bu Pont DE NEMOURS & CoMPANY WILMINGTON, DELAWARE 19898 TOXICOLGCY AND INDUSTRIAL MEDICINE Page 1 (carbon copies listed on page 3) : May 6, 1981 PERSONAL CONFIDENTIAL MENO TO: PH.PD,E.

UPDATE ON THE C-8 BLOOD SAMPLING PROGRAM Pawder/DAinspoevresrailoln darnodpFEiPn bOlpoeordatoCr-s8.levTehliss statistically significant.

DuPont Intemal Memo, "C-8 Blood Sampling Results: Births and Pregnancies" (81) (EIDOT9375); 3.

DuPont Internal Memo, "C-8 Blood Sampling Results: Births and Pregnancies" (4/81) (EID079375); 3.

EEE EE ad mw 10351051 "106/06/87 [Table entitied "C-8 Trend in Blood" o T f s EeI e troe A i s tu [i BEL CTi RL | 03510"5306/06/87 |Hand-drawn graphs Blood C-8 Level Change vs.

(See Exhibit F) W 0116069.1 000002 Richard Hefter January 26, 2004 Page 3 9. 5/6/81 - DuPont Memo Re: Proposal To Lower Acceptable C-8 Blood Level To 0.004 ppm (4 ppb) (EID096478-80) 10. 5/14/81 - DuPont Washington Works C-8 Blood Results (EID713817-19) (names redacted); 11. 5/14/81 - DuPont Chambers Works C-8 Blood Results (EID713820) (name redacted); 12. 5/14/81 - DuPont Charts Re: C-8 Blood Testing Results (EID090084-5); 13. 5/15/81 - DuPont CR&D Haskell Laboratory C-8 Blood Results (EID713821-2) (names redacted); 14. 5/19/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713827-9) (names redacted); 15. 5/19/81 - DuPont Washington Works C-8 Blood Results (EID713825-26) (names redacted); 16. 5/19/81 - DuPont Washington Works C-8 Blood Results (E1D713823-4) (names redacted); 17. 5/20/81 - DuPont Washington Works C-8 Blood Results (EID713834-5) (names redacted); 18. 5/20/81 - DuPont Chestnut Run C-8 Blood Results (EID713832-3) (names redacted); 19. 5/20/81 - DuPont Circleville, Ohio C-8 Blood Results (EID713836-7) (names redacted); 20. 5/20/81 - DuPont Fairfield, Connecticut C-8 Blood Samples (EID713830-1) (names redacted) 21. 5/21/81 - DuPont AJAX, Ontario C-8 Blood Samples (EID713838-9) (names redacted); 22. 6/5/81 - DuPont Memo Re: Program To Monitor Level Of Organic Fluorine (Measured As C-8) In Blood (EID080707-9); W 0116069.1 000003 Richard Hefter January 26, 2004 Page 4 23. 7/13/81 - DuPont Mechelen, Belgium C-8 Blood Results (EID713842-3) (names redacted); 24. 7/13/81 - DuPont Photo Products Rochester, New York C-8 Blood Results (EID713840-1) (names redacted); 25. 7/16/81 - DuPont Washington Works C-8 Blood Results (EID713849-50) (names redacted); 26. 7/16/81 - DuPont C-8 Blood Results Reported To Wilmington, Delaware (EID713844-6) (names redacted); 27. 7/16/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713851-3) (names redacted); 28. 7/16/81 - DuPont Photo Products Brevard, North Carolina C-8 Blood Results (EID713854-5) (names redacted); 29. 7/16/81 - DuPont Dordrecht, Netherlands C-8 Blood Results (EID713847-8) (names redacted); 30. 7/20/81 - DuPont Washington Works C-8 Blood Results (E1D713856-7) (names redacted); 31. 7/24/81 - DuPont Spruance, Virginia C-8 Blood Results (EID713858-9) (names redacted); 32. 7/28/81 - DuPont Fairfield, Connecticut C-8 Blood Results (EID713860) (name redacted); 33. 7/31/81 - DuPont Memo Re: C-8 Blood Sampling Program (EED510244-51); 34. 8/7/81 - DuPont Memo Re: C-8 Blood Sampling Program (EID079552-3); 35. 8/19/81 - DuPont Blood Results Reported To Wilmington, Delaware (EID713861-2) (names redacted); 36. 8/21/81 - DuPont Washington Works C-8 Blood Results (EID713863-5) (names redacted); W 0116069.1 000004 Richard Hefter January 26, 2004 Page 5 37. 8/27/81 - DuPont Chart Re: C-8 Blood Results - Chambers Works, New Jersey (EID110665); 38. 9/1/81 - DuPont Memo Re: Communication Of C-8 Blood Results To DuPont Chambers Works, New Jersey Employees (EID110659-64); 39. 9/8/81 - DuPont Washington Works C-8 Blood Results (EID713866-8) (names redacted); 40. 9/15/81 - DuPont Memo Re: Proposed DuPont C-8 Blood Sampling Program For Employees At Shimizu, Japan (EID079371-5); 41. 9/81 - DuPont Memo Re: C-8 In Blood Transparencies (EID080743-7); 42. 9/29/81 - DuPont Washington Works C-8 Blood Results (EID713869-71) (names redacted); 43. 10/6/81 - DuPont Washington Works C-8 Blood Results (EID713872-4)(names redacted); 44. 10/20/81 - DuPont Washington Works C-8 Blood Results (EID713875-6) (names redacted); 45. 10/27/81 - DuPont Washington Works C-8 Blood Results (EID713877-9) (names redacted); 46. 11/3/81 - DuPont Washington Works C-8 Blood Results (EID713880-82) (names redacted); 47. 12/1/81 - DuPont Memo Re: C-8 Blood Levels In Females Transferred Out Of The Teflon Divisions: Washington Works (EID080677-92); 48. 12/2/81 - DuPont Washington Works C-8 Blood Results (EID713883-5) (names redacted); 49. 12/2/81 - DuPont Circleville, Ohio C-8 Blood Results (EID713886-7) (names redacted); W 0116069.1 000005 Richard Hefter January 26, 2004 Page 6 50. 1/6/82 - DuPont Washington Works C-8 Blood Results (EID713888-90) (names redacted); 51. 1/18/82 - DuPont Washington Works C-8 Blood Results (EID713891-3) (names redacted); 52. 2/19/82 - DuPont Memo Re: Trends In Blood C-8 Levels For Various Teflon Operating Groups: Washington Works (EID079349-52); 53. 4/5/82 - DuPont Memo Re: Blood Tests - Employees Potentially Exposed To C-8 (EID096456); 54. 5/12/82 - DuPont Memo Re: 3M Method For Analysis Of Blood Serum For C-8 (EID072179-81); 55. 5/12/82 - DuPont Memo Re: Fluoride In Blood Related To HFPO (EID096455); 56. 7/6/82 - DuPont Memo Re: C-8 Blood Sampling Program (EID087880); 57. 7/14/82 - DuPont Memo Re: Trends In Blood C-8 Levels For Various Teflon Employee Groups (EID079049-57); 58. 7/14/82 - DuPont Memo Re: C-8 Air And Blood Sampling (EED082729-31); 59. 7/29/82 - DuPont Memo Re: Retention Of C-8 In Blood Of Teflon Employees (EID079294-6); 60. 8/6/82 - DuPont Memo Re: Retention Of C-8 In Employees' Blood (EID080662); 61. 8/6/82 - DuPont Memo Re: C-8 Blood Sampling Program (EID080657); 62. 8/25/82 - DuPont Memo Re: C-8 In Human Blood (EID072164-6); 63. 9/28/82 - DuPont Memo Re: C-8 In Blood Of Teflon Employees (EID0806