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V ` a ia tr.t F H i U P DRINKER H A R V A R D SC H O O L Of P U B L I C r t AL T H BOST ON.

March. 26, 1945 D r . 0.

MANUFACTURING DEPARTMENT ELSEGUNDO REFINERY W.

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November 2b, 1948 Mr.

December 1940 Memorandum for Tank: Cleaning Mile Ament the matter of what constituted a clean tank:, data from the two samples of Mr.

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November 25, 1944 19 Dr .

Oc t o b e r 1 2 , 1944 Mr . 3 .

3"*9&'A ESTABLISHED 1602 E.l. d u Po n t d e Ne mo u r s & Co mp a n y .

July 26, 1949 Dr*.