Document kJDkgX519b6dpjB8GOQGgMzn

FOREIGN r The attached reports show that the amount of lead discharged from the tetraethyl lead buildings is of the order of 6 lbs* per unit of equipment. So'doubt there are variations from day to day, but the comparative uniformity in the results from three buildings justify the assumption that these are fairly representative figures. A review of available literature indicates that the pollution of streams with lead becomes of considerable practical consequence when the lead concentration exceeds 0.1 rag* Fb per liter of water. Ihis is due not to the qualities of the water for drinking, since the lead being in colloidal or suspended form filters out readily, but rather because the flora and fauna of the stream are damaged or destroyed by concentrations in excess of this figure. (According to ray Information, there are at present no federal or state (Ohio) regulations on this matter.} Doubtless considerable amounts of the load Introduced into a stream settle out, and there Is an indication that this has occurred in the drainage canal of the plant (see the result on the ditch water outside the sludge pit) before the swamp or river had been reached. On the other hand the sedimentation of largo quantities of lead compounds in natural streams becomes a recurrent danger with flooding, since flooded soil is made arid * through the deposition of resuspended load. Allowing for no sedimentation of lead compounds emptied directly into a stream such as the Ohio or Mississippi River, the amount of lead discharged by one unit of plant eqxiipment, through one cycle of use would require dilution with 6-1/2 million gallons of water in order to become Kg' 0022977 f' 2' - harmless (about 8?0,0D0 cu.ft. of viator) I am informed by the 0. S. Engineer's Office in Cincinn ati that the man rate of flow of the Ohio river at Cincinnati for the past 20 years* has been approximately 100*000 eu.feet of water per second. At Its lowest (drought 1930) it was 1900 cu. feet per second. Thus if th dlsoharg water from a plant were introduced into th flow of th stream, th operation of 16 units would produce a maximal lead concentration about I/I4. of that which Is described as harmful* (For 16 units about li|. million cubic faot of water would be required as a diluent. At 1900 cubic feet per second th flow of th Ohio River in 8 hours is equivalent to almost 55 rail Mon cubic feet). Sherc is very little doubt that the requirement as to a dilution could be enormously reduced by the sedimentation of th effluent water before discharge into th river. I can see no good reason why this should not be done. In accordance with the foregoing information, X can see no reason why a manufaetaring plant could not be operated on such an inland river as the Ohio. Robert A. Kehoe, H.D. XE 0022978 17 a ter from 3ludge pit of "B" building of Tetraethyl Lead plant of E. I. duPont de Nemours Company at Carney*s Point, New Jersey. Volume Lead Pound - 3630 c.c. - I.7867 gms 1+92.2 p.p.m 0.1*9$ by volume Total water discharged into sludge pit during an 8 hr cycle 21,600 gallons Total lead discharged into sludge pit during an 8 hr cycle 88.7 lbs 16 autoclave charges Average of 5.5 lbs of lead discharged from each autoclave charge Sample submitted by Mr. J. H. Schaefer of Manufacturing Department of Ethyl Gasoline Corporation at Wilmington, Delaware. 3-10-31* KE 0022979 N22726.01 Water from sludge pit of "C" building of Tetraethyl Lead Plant of E. I, duPont da Nemours and Company at Carney*a Point, N.J* Volume Lead found 1*8592 gra3 =Cz- 51&k 3600 c.c. 0.52$ by volume Total discharged into sludge pit during an 8 hour cycle 21,600 gallons Total lead discharged into sludge pit during an 8 hour cycle 93*1 lbs. 16 autoclave charges Average of 5*8 lbs of lead discharged from each autoclave charge. 3-10-3k KB 0022980 Water froia sludge pit of "D" building of Tetraethyl Lead Plant of E. I* duPont de Nemours and Company at Carney*s Point, N.J Volume - 36I4.O c.c. Lead Pound 1.93^8 gms.^o 53^*2 p.p.m.t=C:= 0*53^ by volume Total water discharged into sludge pit during an 8 hour cycle* 21,600 gallons Total lead discharged into sludge pit during an 1 hour cycle. 95*7 lbs. 16 autoclave charges Average of 6.0 lbs. of lead discharged from each autoclave charge. 3-10-3k 0022981 Water from ditch outside the sludge pit of ,TB" building of Tetraethyl Lead plant of E. I. duPont de Nemours and Company at Carney's Point, N.J* Volume - 3600 c.c. Lead found 0.0836 gms.-^O^ 232 p.p.m.^C^ 0.02-3% by volume Total water discharged into drainage ditch during an 8 hour cycle 252,600 gallons. Total lead discharged into drainage canal during an 8 hour cycle. I4B.9 lbs. 3-10-3if K'E' 0022982