Document G6xDX5rnw6jVeQV6bGvNvd8JN

APR1 9 iS82 (nam-lpot.ok-^on) r . T. Parker - Nitro Plant - #507 OATt tUBJICT April 13, 1982 TCDD ANALYSES * ce. H. S. Scott - E2ND T* M,, Bist line f- E2NJ H. M. Galloway NVIRKMCI TO : A. M. Ford A2SA ATTORNEY WORK PRODUCT ATTORNEY-CLIENT PRIVILEGE Regarding your inquiry about the TCDD levels reported in the 1969 Nitro TSD Annual Summary, we have no documents that can verify or determine the source of these numbers. The TSD summary reports that TCDD levels averaged 40-50 ppm during 1968. The Nitro research notebooks of Phil Balderson and Marty Wilson contain no analytical data on TCDD levels during this time period. Balderson stated that if any TCDD analyses were run at Nitro, the results would be recorded either in his notebook or Marty Wilson*s notebook. Balderson and Wilson were apparently the only Nitro chemists to run analyses for TCDD. Rick Atkinson, the only other Nitro chemist working with 2,4,5-T during 1968, stated he does not recall having run an analysis for TCDD in 2,4,5-T. These facts suggest that no TCDD deter minations were made at Nitro during 1968. Nitro measurements of TCDD levels in 2,4,5-T were carried out in both the years before and after 1968. These measurements suggest that the 40 to 50 ppm figures cited in the TSD summary are not realistic (assuming the Nitro analytical method is reasonably accurate). Nitro measure ments never exceeded 28 ppm, and TCDD values typically averaged 12 ppm or less. The attached notebook pages comprise all of the Nitro analytical data I could find on TCDD analyses. I have included some comments on these copies in parenthesis. In particular,`I suspect the numbers reported in Marty Wilson's notebook may be questionable. The numbers are quite low and certain samples run by both St. Louis and Marty do not agree. The St. Louis numbers cited in Marty's notebook were probably generated by Bill Udell (currently with Monsanto Agricultural Division). It should be noted that Phil Balderson employed a slightly different method from Marty Wilson for TCDD analyses, and Balderson's method was based on a method obtained from Dow. CONFIDENTIAL SUBJECT TO PROTECTIVE ORDER. 02290* -* 2 Another possible source of TCDD analytical data would be Bill Udell. Apparently, he ran TCDD analyses for Corporate Research around the time period in question. The TSD summary might be based on numbers generated by Udell. It should be noted that lots of 2,4,5-T produced in 1968 should begin with the code letters "NK" and this can be used to determine if analytical results correspond to material made in 1968. Finally, the report in the 1969 TSD summary was probably generated by R. L. Dillon, Jr. and/or J. C. Strum. These engineers were handling process changes, etc. at that time. I questioned Dillon (currently superintendent of MHA operations at Nitro) and he said he did not recall the source of the numbers. Strum is no longer working for Monsanto. It is quite possible the numbers they reported are erroneous. sa Attachment R. T. Parker CONFIDENT! M SUBJECT. TO PROTECTIVE ORDER. C22903 '*0$ f' B a ld trjts, /vo A y//rAi S/4JMM? ^vi^irxS'S'Tfrot'&S70#' 77/ / rttr#0-S7i?& Z&9S- <?Sr *7 7 ~ 'r 7Z> AF yy/y 4>/d /#S&c.r-0* 3 J& 3/Z f/T'S W SS A? 7 2 0 CP ^ i?di/Z' SgLd "Cy 4 si*.rS2 -* *U*~ fatsOJ* A4?<>S&SJ'2sfs7 & r* ^SWSV^-' # . /ffM j>jy7PASsz& tS j tV/<r/i* 407* S0 4Jl1\i1\\ 7<0 / A t/ 4 v- 7yy? A 'Jr s<> . s7 /sd !? r,& f'. y /z /z r je w s TK&SAS S sh a y /d y tr y ' . ... 4 /M V W /T /iS d~ / / < r ^ r ^ . T f/'p /y y y y y f' yd S/y0Z . am # ? A S / y A JL 7 4 6 * //. -C M /cy~ A? J 7 // sy zr 74 5" A t/ W /S& A>/yz7 yt//X,//&6<f. 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