USGS Water-Year Summary for Site 393617075380002

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	Available Parameters
	72019 Water level, depth LSD(Min.,Mean,Max.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

393617075380002 SCD-DP-15AA

Northern Atlantic Coastal Plain aquifer system
Columbia Group

LOCATION - Lat 39°36'17.12", long 75°38'00.08" referenced to North American Datum of 1983, New Castle County, DE, Hydrologic Unit 02040205,

GROUNDWATER RECORDS

WELL CHARACTERISTICS - Depth 2.80 ft. Upper casing diameter 2 in; top of first opening 2.3 ft, bottom of last opening 2.8 ft.

DATUM - Land-surface datum is 0.23 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of 2" PVC, 5.43 ft above land-surface datum, Nov. 16, 2011 to Dec. 15, 2011; Top of 4" PVC, 3.74 ft above land-surface datum, Dec. 14, 2011 to present.

PERIOD OF RECORD - November 2011 to current year.

GAGE -

Water Year 2020 - 2022: Records good. Recorder restarted September 3, 2020.

Water Year 2016: Records good. Recorder removed September 1, 2016.

Water Year 2015: Records good. Recorder installed July 22, 2015.

Water Year 2014: Records good. Recorder removed December 11, 2013.
Water-level measurements by U.S. Geological Survey personnel. Equipped with a digital water-level recorder - 15-minute recording interval, December 2011 to December 2013 and July 22, 2015, to September 1, 2016.

REMARKS -

Drive point 15AA; USGS - Potomac Aquifer Study at Standard Chlorine, Delaware City. Missing data due to instrument removal during water-quality sampling. Recorder removed on December 11, 2013 and was replaced on July 22, 2015 until final removal upon project completion on September 1, 2016. This site is part of bioremediation research in a wetland setting. Water level data may only represent shallow, small-scale groundwater flow processes and not necessarily represent unconfined water-table conditions.

Project was restarted and new equipment was installed 09/03/2020. A pressure transducer [Insitu-Troll 700 S/N: 681643].

EXTREMES FOR PERIOD OF RECORD -

New equipment installed 09/03/2020: Highest water-level recorded, 1.70 ft above land surface, December 25, 2020 (recorder); lowest measured, 0.43 ft below land surface, August 22, 2022 (recorder).

Discontinued Equipment on 09/16/2016: Highest water-level recorded, 3.64 ft above sea level, October 30, 2012 (recorder); lowest measured, 0.08 ft above sea level, October 30,2012 (recorder).