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Data on shallow ground-water quality in the New Cassel area, Long Island, New York, 1990-91, with geophysical logs of selected wells

1996; United States Department of the Interior; Linguagem: Inglês

10.3133/ofr96104

2332-4899

Richard A. Cartwright, Anthony Chu,

Water Quality and Resources Studies

Areas of Nassau County with high population density and industrial/commercial activity have a high potential for ground-water contamination.Ground water in the New Cassel study area, a 4square-mile area in the towns of Hempstead and North Hempstead, was sampled from May 1990 through May 1991 to document concentrations of volatile organic and inorganic constituents.This report presents the concentrations of organic and inorganic constituents detected in samples from 74 water-table wells and includes geophysical (gamma and electromagnetic) logs of 21 of the 22 wells that were newly installed for the study.It also presents ground-water levels at the time of sampling and well-completion data, and describes the field methods and quality-control procedures for water-sample collection. Location and SettingThe study area comprises about 4 mi2 in the towns of Hempstead and North Hempstead in east-central Nassau County (fig.1).The main sites of investigation are the industrial/commercial areas in the hamlet of New Cassel in the northern half of the study area, and the predominantly residential area to the south in the hamlet of Salisbury (fig.2).These areas, hereafter referred to as the New Cassel study area, were developed in the late 1940's and early 1950's, and growth since then has been minimal.The 1991 populations in New Cassel and Salisbury were 10,327 and 12,226, respectively (Long Island Lighting Company, 1991).