Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1970. First edition, first printing. Softcover. Item #42211
Since the 1940's, construction of numerous one-family homes and some light industrial plants in parts of Nassau County have resulted in contamination of the upper part of the ground-water reservoir, both by seepage of effluent from cesspools and septic-tank systems and by industrial wastes discharged accidentally or intentionally into the ground water. 67 pages with graphs, tables, map and references, plus the required five folded map plates in the rear pocket. Bound in original orange stiff paper covers printed in black. Library stamp and call number on the front cover. No other library markings, labels or pockets were ever present. A very good plus copy.