National Lead Co.

/ / LEAD INDUSTRIES ASSOCIATION 420 Lexington Avenue New York 17, N.

LIA08808 ' :^iHii hitirfi[ LEAD INDUSTRIES ASSOCIATION aaa LnwnTnw tnw NOW fOM It, M. f

Mr Cole vas here on Friday, September 1959 Compounding MrWrae te Conclusions (Page 3) 1) The weighing of certain powders at the south end of the dry mix powder bins indicated high lead concentration (**33 Milligrams per cubic meter) Observation of this operation indicated tee followings (a) Operation is being performed several feet away from tee exhaust system This exhaust was Installed after our Medical Department survey of November 5*8, 1957 (b) Certain new materials are being weighed and there are not sufficient storage bins in regular line to accomodate them LSttOR-m (a) Move weighing operation back under hood in order that proper advantage may be taken of exhaust system* (b) Relocate exhaust hood in order to use to better advantage On this item Shop Requisition #22015 has been issued SPNY 007417 *; he dumping of mix lato :uggy a; .0 botvOia of tao ribh-:.a oelTjsrs on the dry line results i: !

The more promising fillers suffer the disadvantage (for aircraft applications) of being very heavy. a) The following are data using similar concentrations of fillers: Filler No filler Zinc oxide Titanium dioxide Mercuric oxide Calcium oxide Nickelous oxide Nickelic oxide Lead oxide Manganese dioxide Cupric oxide Silver oxide Stannic oxide Ferric oxide Alumina Bentone No. 34 Glass Floe Hi-Sil Mica Magnesol Solka-floc Acetylene Black Santocel Asbestos 7TF (as in Adhesive VII formula) Amount of Filler Per 100 Grams of Adhesive VII Base 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 37.5 25 20 37.5 37.5 20 25 5 18.5 Tensile Shear Strength at R.T. 180F (Average of 3 samples) 3180 2113 2720 2790 3020 2193 2953 3300 3010 3037 460 2590 2953 3167 2377 2970 2620 1443 663 2487 2057 2517 3060 (Average of 3 samples) 2135 3420 3200 2830 3057 1610 3107 3493 3220 3223 -- 3123 3517 3203 2303 2633 3747 1003 2737 2223 2343 3113 3067 b) The following are data using various concentrations of filler in an attempt to incorporate the maximum amount and still have an adhesive of desirable consistency: LAM 029188 ABS-018396 Shell Chemical Corporation -3- January 20, 1953 Filler No filler Zinc oxide Titanium dioxide Calcium oxide Nickelic oxide Lead oxide Manganese dioxide Cupric oxide Stannic oxide Ferric oxide Alumina Glass Floe Hi-Sil Solka-floc Santocel Asbestos 7TF (standard VII formula) Nylon floe (NYL-60) Nylon floe (N-706) Lufkin Husk-Fill Amount of Filler Per 100 Grams of Adhesive VII Base -. 100 133.3 87 20 217 283.3 313.3 106.7 100 70 30 16.7 6.6 6.6 25.3 20 20 50 Tensile Shear Strength at R.T. 180 F (Average of 3 samples) 2713 2397 2467 2833 2370 2473 2610 2533 2507 2793 2833 3187 3483 2513 2243 3330 (Average of 3 samples) 1353 2660 3080 2680 3053 3413 2807 1920 2817 3480 3250 1840 3077 1820 1823 2797 3287 3163 2887 2007 2093 2013 c) The following data pinpoint some of the best fillers found for Adhesive VII: Filler Titanium dioxide Nickelic oxide Amount of Filler Per 100 Grams of Adhesive VII Base 166.7 150 100 66.7 233.3 216.7 166.7 90 Tensile Shear Strength at -70 R.T. 180 F 1493 1700 2083 2333 2223 1803 2120 2020 1547 1857 2040 2727 1797 1927 2053 2020 2067 2683 2523 1760 2620 2330 2437 2670 LAM 029189 ABS-018397 Shell Chemical Corporation -4- January 20, 1953 Filler Lead oxide Ferric oxide Alumina Hi-Sil Amount of Filler Per 100 Grams of Adhesive VII Base 250 233.3 183.3 150 133.3 108.9 83.3 66.7 103.3 86.7 53.3 36.7 23.3 20 13.3 10 Tensile Shear Strength at -70 R.T. 180 F 1813 2217 2157 2527 2203 1937 2543 2387 2050 2060 2463 2020 2287 2370 2540 2210 2093 2203 2390 2720 2460 3057 2630 2880 1923 2433 2700 3073 3220 3313 2893 2907 2930 3773 3153 2763 3683 3203 2900 2763 2490 2817 2677 2157 2237 1817 1657 1777 Very truly yours.

D* -2- July 16, 1956 set straight* If none of you want to write bin, I am quite willing to do so myself, but, as a layman, I want medical backing for That I say* And to this I might add that I don't need an M*D* degree to know that his advice to feed Mr* Miller white tablets and vitamin capsules, wLth no suggestion that he be removed from lead exposure pending possible future installation of protective dust control, is just about the nadir in industrial practice* In my book, it stinks* i Sincerely, MB:GW Enclosure cc: Dr* Harcfor Dr* Johnstone Dr* Shipman Dr* Sterner PS: This letter was drafted on Friday* This morning (Monday), came an excellent letter from Tom, with a no less admirable enclosure from Dr* Foreman* There is no indication as to whether copies went to any of you* If not, and you wish them, I am sure that our two Los Alamos friends would approve my sending them to you* 03747 LEAD INDUSTRIES ASSOCIATION 420 Lexin gton Avenue New York 17, N.

Rifkin's study of exhaust products of leaded fu els.

-n #22016 has been issued t-o: (a) enclose vb.e rapid Standards Conveyor (b) to provide a back on the hood on" #2 line - (o) to rework the hooi oii #1 line* J.tO Ecrderlir.e health hazard during dumping from blender to *;X naomermill may exist* Shop requisition #22017 has been issued to cover a velocity check on the exhaust system here* Xt is possible we may have to throttle back the blast gates mentioned in para* #2 to provide more air here* ko) Ho comments - baaed on their comments* 5o) Minimal concentrations of airborne lead exist at rolling machines except b&Cking machine #6* (a) It Is apparent that several conditions exist in the fume hood system, due to "poor51 maintenance* This is not entirely the fault of poor workmanship but more from the absence of work performed on the equipment* Shop requisition #22020 has been Issued tos (a) Check the fan for BPH's and speed up if, necessary* (b) Relocate several hoods and "fasten with a purpose"* (c) Secure "compressed air" signs properly* (d) Repair machine hopper before a complete new one is required* Strip.

Two-lead temperature elements are not recommended, since they do not permit correction for lead resistance.

Sevan - (3j - March 8, 1952 ^ little doubt that this man died of tetraethyl lead poisoning.

Without waiving these objections, Kaiser Gypsum states: Since Kaiser Gypsum did not manufacture' "insulation products," this request is not likely to lead to the discovery of admissible evidence. 8.

A. , I nc. , 200 Fi f t h Avenue, New Yor k 10, New Yor k Lead I ndust r i es Associ at i on ' Mr .

Two-lead temperature elements are not recommended, since they do not permit correction for lead resistance.

Ozark 12-88 Leaded.

tha Clayton Sllrar Maaa at ChaUla, la additlam to maintaining ataady pro- { doetlop of lead**lm are, la at proaont deepening lta abaft* Tha fayauoter Nlnae, > Im.( a mbaldiary of tha Spofcana-