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Data Series 588

A product of the Toxic Substances Hydrology Program

Prepared in cooperation with the Air Force Center for Engineering and the Environment

Water-Quality Data from Shallow Pond-Bottom Groundwater in the Fishermans Cove Area of Ashumet Pond, Cape Cod, Massachusetts, 2001–2010

By Timothy D. McCobb and Denis R. LeBlanc

Thumbnail of report PDF (30 MB)


The U.S. Geological Survey (USGS) collected water-quality data between 2001 and 2010 in the Fishermans Cove area of Ashumet Pond, Falmouth, Massachusetts, where the eastern portion of a treated-wastewater plume, created by more than 60 years of overland disposal, discharges to the pond. Temporary drive points were installed, and shallow pond-bottom groundwater was sampled, at 167 locations in 2001, 150 locations in 2003, and 120 locations in 2004 to delineate the distribution of wastewater-related constituents. In 2004, the Air Force Center for Engineering and the Environment (AFCEE) installed a pond-bottom permeable reactive barrier (PRB) to intercept phosphate in the plume at its discharge point to the pond. The USGS monitored the performance of the PRB by collecting samples from temporary drive points at multiple depth intervals in 2006 (200 samples at 76 locations) and 2009 (150 samples at 90 locations). During the first 5 years after installation of the PRB, water samples were collected periodically from five types of pore-water samplers that had been permanently installed in and near the PRB during the barrier's emplacement. The distribution of wastewater-related constituents in the pond-bottom groundwater and changes in the geochemistry of the pond-bottom groundwater after installation of the PRB have been documented in several published reports that are listed in the references.


This report is published as a Compact Disc (CD-ROM) and and World Wide Web (WWW) page. On the WWW the report is available for viewing and printing as Portable Document Format (PDF) files. Two versions of the report are available: a high-resolution version for printing and a lower-resolution version automated with handicap compliance features. Both include blue-colored links to (.pdf) tables. The tables are presented also in Excel (.xls) and comma separated value (.csv) formats through the table-selector interface.


This database, identified as DS 588, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.

Posted October 27, 2011

For additional information contact:
Timothy D. McCobb or Denis R. LeBlanc
U.S. Geological Survey
10 Bearfoot Road
Northborough, MA
Telephone: (508) 490–5016 or
(508) 490–5030
Fax: (508) 490–5068
E-mail: Timothy D. McCobb or
Denis R. LeBlanc

URL for Massachusetts-Rhode Island Water Science Center:

URL for Cape Cod Toxic Substances Hydrology Research Site:

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Suggested citation: McCobb, T.D., and LeBlanc, D.R., 2011, Water-quality data from shallow pond-bottom groundwater in the Fishermans Cove area of Ashumet Pond, Cape Cod, Massachusetts, 2001–2010: U.S. Geological Survey Data Series 588, 13 p., CD-ROM, also available at




Water-Quality Data for Samples Collected from Temporary Drive Points

Water-Quality Data for Samples Collected from Permanent Instrumentation near the Permeable Reactive Barrier



References Cited

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