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HAGS/AEG April Meeting April 12, 2018 Nitrates in Rural Groundwater Supply Wells Not From Farming: An Unexpected Finding Based on Forensic Hydrogeology

4/12/2018
When: 04/12/2018
Dinner from 4:45 – 6:15; meeting at 6:30
Where: AEG Offices
441 Friendship Road
Harrisburg, Pennsylvania  17111
United States
Presenter: Mark Eisner, P.G., President – Advanced Land and Water, Inc.
Contact: Amy Randolph
717-395-3181

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HAGS/AEG April Meeting
April 12, 2018

MEETING TOPIC: Nitrates in Rural Groundwater Supply Wells Not From Farming: An Unexpected Finding Based on Forensic Hydrogeology

Presented by: Mark Eisner, P.G., President – Advanced Land and Water, Inc.

Abstract: Sharptown, MD, is located in an agriculturally-dominated area of the Delmarva Peninsula. Supplied by four wells, groundwater quality compliance samples have reflected elevated nitrate concentrations for years. Non-point agricultural sources were the suspected source, but a detailed study as a component of an updated Source Water Protection Plan assessment revealed a surprising interpretation.

End-Member Mixing Analysis (EMMA) – a common surface water investigative technique – was applied to groundwater quality data from the supply wells. Chloride and nitrate tracers, combined with knowledge of local land uses and consideration of the probable condition of aging infrastructure, to support a hypothesis that sewer system leaks rather than agriculture explained the observed nitrate distribution. Geochemical tracers such as methylene blue active surfactants (MBAS), which are classical indicators of domestic sewerage, were sampled for to confirm the sewage leak hypothesis.

Speaker Bio:  Mr. Eisner is President of Advanced Land and Water, Inc., and has nearly 30 years of experience in environmental and hydrogeological consulting. He earned his B.S. in Geology from the University of Maryland and his M.S. in Geology from the University of Delaware. Possessing more than 30 years’ professional experience, Mr. Eisner directs environmental and hydrogeologic investigations for both private and public sector clients across the Mid-Atlantic region, including projects entailing groundwater supply exploration, development, testing, permitting, protection and discharge

The first fall meeting will be held at 441 Friendship Road Harrisburg, PA (near Bass Pro). Dinner (4:45 – 6:15) will be at Fiesta Mexico
3957 Paxton Street (between Ruby Tuesday and Nissan dealership)


If you plan to attend the dinner before the meeting, RSVP by noon, April 10, 2018 so we can call in the reservation.


RSVP for dinner no later than noon Tuesday, April 10th to Amy Randolph at secretaryhags@gmail.com, or at 717-395-3181

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