U.S. Geological Survey, Water Resources of Pennsylvania

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2004-5193

Evaluation of Borehole Geophysical Logs at the Sharon Steel Farrell Works Superfund Site, Mercer County, Pennsylvania

By Steven D. McAuley

ONLINE ONLY

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ABSTRACT

On April 14–15, 2003, geophysical logging was conducted in five open-borehole wells in and adjacent to the Sharon Steel Farrell Works Superfund Site, Mercer County, Pa. Geophysical-logging tools used included caliper, natural gamma, single-point resistance, fluid temperature, and heatpulse flowmeter. The logs were used to determine casing depth, locate subsurface fractures, identify water-bearing fractures, and identify and measure direction and rate of vertical flow within the borehole. The results of the geophysical logging were used to determine the placement of borehole screens, which allows monitoring of water levels and sampling of water-bearing zones so that the U.S. Environmental Protection Agency can conduct an investigation of contaminant movement in the fractured bedrock. Water-bearing zones were identified in three of five boreholes at depths ranging from 46 to 119 feet below land surface. Borehole MR-3310 (MW03D) showed upward vertical flow from 71 to 74 feet below land surface to a receiving zone at 63-68 feet below land surface, permitting potential movement of ground water, and possibly contaminants, from deep to shallow zones. No vertical flow was measured in the other four boreholes.

Table of Contents

Abstract
Introduction
     Purpose and Scope

     Study Area Location and Physiography
     Hydrogeologic Setting
     Borehole Geophysical Logs
Evaluation of Borehole Geophysical Logs and Well Screen Placement
     T-75 (MW10)
     MR-3310 (MW03D)
     MR-3311 (MW4)
     MR-3312 (MW7)
     MR-3313 (MW01D)
Summary
Acknowledgments
References Cited

Figures

1. Map showing location of Sharon Steel Farrell Works Superfund Site and boreholes logged, near Farrell, Pennsylvania
2. Borehole geophysical logs and water level in borehole T-75 (MW10), collected on April 14, 2003, at Sharon Steel Farrell Works Superfund Site, near Farrell, Pennsylvania
3. Borehole geophysical logs, water level, and direction of borehole flow under nonpumping conditions in borehole MR-3310 (MW03D), collected on April 14, 2003
4. Borehole geophysical logs, water level, and direction of borehole flow under nonpumping conditions in borehole MR-3311 (MW4), collected on April 15, 2003
5. Borehole geophysical logs, water level, and direction of borehole flow under nonpumping and pumping conditions in borehole MR-3312 (MW7), collected on April 15, 2003
6. Borehole geophysical logs and water level in borehole MR-3313 (MW01D), collected on April 15, 2003

Table

1. Well-identification numbers, latitude and longitude location, depth logged, casing depth, and geophysical logs collected

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

View the full report in PDF 361 KB

For more information about USGS activities in Pennsylvania contact:
District Chief
U.S. Geological Survey
Water Resources Discipline
215 Limekiln Road
New Cumberland, Pennsylvania 17070
Telephone: (717) 730-6960
Fax: (717) 730-6997
or access the USGS Water Resources of Pennsylvania home page at:
http://pa.water.usgs.gov/.




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