The depth to the Calvert Formation is approximately 35 to 40 feet below ground surface. This unit is composed of marine, estuarine, and delta plain silty clays, and forms an aquitard. The topography of this area of Delaware is flat agricultural land with some hardwood forests. Monthly average temperatures range from 25 to 67 degrees F, with annual average of 45 degrees F. Annual average precipitation is 40.4 in, with August being the wettest month. Summers are warm and humid.
Winters can be cold, but are generally mild.
This site is used to demonstrate systems for remediating soils and ground water contaminated with heavy metals, volatile organic compounds, and explosives, using in situ and ex situ techniques. LAAP is a U.S. Army Armament, Munitions and Chemical Command facility that is operated under contractual agreement with the Thiokol Corporation. The site is currently on modified caretaker status. Soils in the demonstration area are generally sandy loam underlain by clayey sand. There are two aquifers underlying the demonstration area.