Contamination of Vegetation by Tetraethyl Lead

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Science  07 Sep 1962:
Vol. 137, Issue 3532, pp. 765-766
DOI: 10.1126/science.137.3532.765


Tetraethyl lead is a normal constituent of vegetation growing along our highways. Washed grass near Denver contained 3000 ppm (in ash) near major intersections and > 50 ppm for 500 feet downwind. Vegetables grown within 25 feet of a road in upstate New York and western Maryland averaged 80 to 115 ppm.

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