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Identification of water-bearing zones by the use of geophysical logs and borehole television surveys, collected February to September 1997, at the Former Naval Air Warfare Center, Warminster, Bucks County, Pennsylvania

Open-File Report 98-86
Prepared in cooperation with the U.S. Department of the Navy
By:
https://doi.org/10.3133/ofr9886

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Abstract

Between February 1997 and September 1997, 10 monitor wells were drilled near the site of the former Naval Air Warfare Center, Warminster, Bucks County, Pa., to monitor water levels and sample ground-water contaminants in the shallow, intermediate, and deep water-bearing zones. The sampling will determine the horizontal and vertical distribution of contaminated ground water migrating from known or suspected contaminant sources. Four wells were drilled north of the property adjacent to Area A, three wells along strike located on Lewis Drive, and three wells directly down dip on Ivyland Road. Well depths range from 69 feet to 300 feet below land surface.

Borehole-geophysical logging and television surveys were used to identify water-bearing zones so that appropriate intervals could be screened in each monitor well. Geophysical logs were obtained at the 10 monitor wells. Borehole television surveys were obtained at the four monitor wells adjacent to Area A.

Caliper and borehole television surveys were used to locate fractures, inflections on fluidtemperature and fluid-resistivity logs were used to locate possible water-bearing fractures, and heatpulse- flowmeter measurements verified these locations. Natural-gamma logs provided information on stratigraphy. After interpretation of geophysical logs, borehole television surveys, and driller's logs, all wells were screened such that water-level fluctuations could be monitored and water samples collected from discrete water-bearing zones in each borehole.

Suggested Citation

Conger, R.W., 1998, Identification of water-bearing zones by the use of geophysical logs and borehole television surveys, collected February to September 1997, at the Former Naval Air Warfare Center, Warminster, Bucks County, Pennsylvania: U.S. Geological Survey Open-File Report 1998–0086, 26 p., https://pubs.er.usgs.gov/publication/ofr9886.

ISSN: 2331-1258 (online)

Table of Contents

  • Abstract
  • Introduction
  • Evaluation of borehole-geophysical logs
  • Conclusions
  • References cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Identification of water-bearing zones by the use of geophysical logs and borehole television surveys, collected February to September 1997, at the Former Naval Air Warfare Center, Warminster, Bucks County, Pennsylvania
Series title Open-File Report
Series number 98-86
DOI 10.3133/ofr9886
Year Published 1998
Language English
Publisher U.S. Geological Survey
Contributing office(s) Pennsylvania Water Science Center
Description iv, 26 p.
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details