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New Jersey Water Science Center
Puchak Overview, New Jersey
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USGS assistance to USEPA on the remedial investigation and feasibility study of the Puchack well field Superfund site, Pennsauken, New Jersey
Project Title: USGS assistance to USEPA on the remedial investigation and feasibility study of the Puchack well field Superfund site, Pennsauken, New Jersey
Puchak well field is located in Pennsauken Township, an area with significant pumpage from the Potomac-Raritan-Magothy aquifer system well fields owned by the City of Camden Water Department and the Merchantville-Pennsauken Water Commission. Ground water contamination from a chromium plume affecting the wells at the Puchak well field resulted in termination of the use of the well field for potable water in 1984. The USGS, in cooperation with the US Environmental Protection Agency and Camp, Dresser, and McKee (CDM) Inc., is using an existing ground-water flow model (Pope and Watt, 2004 and Pope and Watt, 2005) to study the effects of pumpage from wells surrounding the Puchak well field. Model results will aid in the proper design and evaluation of a Pilot Amendment Injection Test. The normal, short-term variability of pumpage from the well fields, stemming from changes in demand, rotation of production sequencing, maintenance down time, etc., is likely to have a significant impact on the hydrologic system and may have a significant impact on conditions controlling a long-term remediation process at the superfund site and on the ability to identify likely source areas.
The initital township-scale ground-water flow model was upgraded with more recent water-use data (2001-2007) and recalibrated to evaluate the effects of short-term variations in pumpage. The sensitivity of the direction and travel time of ground-water flow was evaluated along pilot-test transects to the uncertainty associated with simulated hydrologic parameters and the effects of pumpage variability present in the 2001 to 2007 water-use data.
Location of the study area, chromium plumes and baseline ground-water withdrawals, Pennsauken Touwnship and vicinity, Camden Coundy, New Jersey
Pope, D.A. and Watt, M.K., 2004, Simulation of ground-water flow in the Potomac-Raritan-Magothy aquifer system, Pennsauken Township and Vicinity, New Jersey: U.S. Geological Survey Scientific-Investigation Report 2004-5025, 60 p.
Pope, D.A. and Watt, M.K., 2005, Use of a ground-water flow model to delineate contributing areas to the Puchak well field, Pennsauken Township and Vicinity, Camden County, New Jersey: U.S. Geological Survey Scientific Investigation Report 2004-5101, 47 p.
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