Document n94znvno07paKXr4avLQJ6836

ReorderNo. 912 PARKBRANDFOLDER MEDIUMHEAVYWEIGHT l"HsArRTNFOrRRDD, CrOrN'NOEMCTPIACNUYT OF CL NEWJERSEY a iti X 0.25% tetraethyllead which is very high. There were three men on the job and all were ill so if the inherent psychologic nature of the men is c Zeboski spent the most time within the tank but deBern highest concentration of lead. 3 men involved on job 3 men used mask only part time 3 were ill Factors responsible: 1. Failure to wear mask 2. High concentration of organic lead in s 11- 1-1963 Lester W. KE 0017188 " 10 grams of each material wdre extracted t ether. This fraction gave organic lead. The re traction was then extracted three times with l!l gave most of the inorganic lead. The, residue of was then dried and ignited, in the Muffle furnace dissolved in 1!1 hot hydrochloric acid and gave lead. After the preparation of the fractions, t each were made according to our ugual procedure. Results A. Dirt beneath manhole and pipe connection. 1. Ether extract of 10.00 grams (Organic ^ Pb found - 3.80 mgs. $ Pb found - 0.03S.i 2. Nitric Extract (10.00 grams) Inorgani Pb found - 46.00 mgs. '$ Pb found - 0.46$ 3. Residue (10.00 grams) Balance of Inor . Pb found - 0.57 mgs. $Pb found - 0.006$ Total lead found in sample - 5 0 . 3 7 m . $ lead - ,1-- 0.50$ . Lead calculated as"Tead tetraethyl ( $ lead tetraethyl -B. Bottom scale and sludge. 1. Ether extract (10.00 gms.) Organic le . Pb formd - 25.00 mas. $ Pb - 0.25$ ' 2. Nitric Acid extract (10.GO gms.) Inor Pb found $ Pb ' 318.00 mgs. 518$ . C. Wall Scade 1. Ether extract (10 grams) Organ fo Pb found - 2.20 mg Pb - 0 e02/6 . 2. Nitric Acid Extract(10 grams) %Pb found - 90.00 m Pb - 0.90# 3. Residue (10 grams) Balance of % %Pb found - 1.63 mg Pb - 0.016 Total lead found - 93.83 m %lead f- 0.94 Pb calculated as lead tetraethy %Pb tetraethyl Rote These samples were taken at least 10 d been cleaned. During these ten days t posed to the atmosphere and considerab ethyl had evaporated in the meantime. been .converted to Inorganic salts, as It is safe to say that mostrof .the.Ino of cleaning had;1existed;;a,sy.leadf;tetrae were therefore calculated on.this basi reason to assume that the.amount, of le of cleaning was several times the amou were submitted. ' , -