| Abstract: | Between October 2002 and January 2003, geophysical logging was conducted in six boreholes at the
Berks Sand Pit Superfund Site, Longswamp Township, Berks County, Pa., to determine (1) the waterproducing
zones, water-receiving zones, zones of vertical borehole flow, orientation of fractures, and
borehole and casing depth; and (2) the hydraulic interconnection between the six boreholes and the site
extraction well. The boreholes range in depth from 61 to 270 feet. Geophysical logging included collection
of caliper, natural-gamma, single-point-resistance, fluid-temperature, fluid-flow, and acoustic-televiewer
logs. Caliper and acoustic-televiewer logs were used to locate fractures, joints, and weathered zones.
Inflections on fluid-temperature and single-point-resistance logs indicated possible water-bearing
fractures, and flowmeter measurements verified these locations. Single-point-resistance, natural-gamma,
and geologist logs provided information on stratigraphy. Flowmeter measurements were conducted while
the site extraction well was pumping and when it was inactive to determine the hydraulic connections
between the extraction well and the boreholes.
Borehole geophysical logging and heatpulse flowmetering indicate active flow in the boreholes. Two
of the boreholes are in ground-water discharge areas, two boreholes are in ground-water recharge areas,
and one borehole is in an intermediate regime. Flow was not determined in one borehole. Heatpulse
flowmetering, in conjunction with the geologist logs, indicates highly weathered zones in the granitic
gneiss can be permeable and effective transmitters of water, confirming the presence of a two-tiered
ground-water-flow system.
The effort to determine a hydraulic connection between the site extraction well and six logged
boreholes was not conclusive. Three boreholes showed decreases in depth to water after pumping of the
site extraction well; in two boreholes, the depth to water increased. One borehole was cased its entire
depth and was not revisited after it was logged by the caliper log. Substantial change in flow rates or
direction of borehole flow was not observed in any of the three wells logged with the heatpulse flowmeter
when the site extraction well was pumping and when it was inactive. |
| Genre: | USGS Numbered Series |
| ProdID: | 53202 |
| Citation Author: | Low, Dennis J.; Conger, Randall W. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 29 p. |
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| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2003-399 |
| Citation Search Results Text: | Description of borehole geophysical and geologist logs, Berks Sand Pit Superfund Site, Longswamp Township, Berks County, Pennsylvania; 2003; OFR; 2003-399; Low, Dennis J.; Conger, Randall W. |
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| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Description of borehole geophysical and geologist logs, Berks Sand Pit Superfund Site, Longswamp Township, Berks County, Pennsylvania; 2003; OFR; 2003-399; Low, Dennis J.; Conger, Randall W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (DOCUMENT): | http://pa.water.usgs.gov/reports/ofr03-399.pdf |
| Date Other: | Sat, 1 Nov 2003 00:00 -0600 |
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