Pore-water quality in the clay-slit confining units of the lower Miocene Kirkwood Formation and hypothetical effects on water quality in the Atlantic City 800-foot sand, northeastern Cape May County, New Jersey, 2001

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Authors:Szabo, Zoltan; Keller, Elizabeth A.; Defawe, Rose M.
Author Affiliations:Primary:
U. S. Geological Survey, United States
Source:Scientific Investigations Report, No.SIR2006-5134, 26p. Publisher: U. S. Geological Survey, Reston, VA, United States. ISSN: 2328-031X
Publication Date:2006
Note:In English. Accessed on June 1, 2007. 38 refs.Prepared in cooperation with the New Jersey Department of Environmental Protection
Summary:Pore water was extracted from clay-silt core samples collected from a borehole at Ocean View, west of Sea Isle City, in northeastern Cape May County, New Jersey. The borehole intersects the lower Miocene Kirkwood Formation, which includes a thick sand and gravel unit between two clay-silt units. The sand and gravel unit forms a major confined aquifer in the region, known as the Atlantic City 800-foot sand, the major source of potable water along the Atlantic Coast of southern New Jersey. The pore water from the core is of interest because the borehole intersects the aquifer in an area where the ground water is sodium-rich and sulfidic. Locally in the aquifer in central and southern Cape May County, sodium concentrations are near the New Jersey secondary drinking-water standard of 50 mg/L (milligrams per liter), and typically are greater than 30 mg/L, but chloride and sulfate do not approach their respective secondary drinking-water standards except in southernmost Cape May County. Pore waters from the confining units are suspected to be a source of sodium, sulfur, and chloride to the aquifer. Constituent concentrations in filtered pore-water samples were determined using the inductively coupled plasma-mass spectrometry analytical technique to facilitate the determination of low-level concentrations of many trace constituents.
Subjects:Alkali metals; Aquifers; Boreholes; Cenozoic; Chlorides; Clastic sediments; Clay; Confining beds; Controls; Drinking water; Gravel; Ground water; Halides; Kirkwood Formation; Lower Miocene; Metals; Miocene; Neogene; Pollutants; Pollution; Pore water; Potentiometric surface; Salt-water intrusion; Sand; Sediments; Silt; Sodium; Sulfur; Tertiary; Transport; USGS; Water quality; Cape May County New Jersey; New Jersey; United States; Atlantic City Sand
Coordinates:N390000 N391500 W0744500 W0750000
Record ID:2007056668
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from NTIS database, National Technical Information Service, Springfield, VA, United States
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