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|Title:||Aberdeen Area Fire Training Area hydrologic assessment Aberdeen Proving Ground|
|Authors:||Aberdeen Proving Ground (Md.). Environmental Management Division.|
Whitten, Charlie B.
Miller, Samuel P.
Derryberry, Nancy A.
Aberdeen Proving Ground (Md.)
Water quality management
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; GL-92-20.|
Abstract: In 1986, the U.S. Environmental Protection Agency (EPA) issued a Hazardous Waste Management Permit to Aberdeen Proving Ground (APG), Maryland. The permit required a Resource Conservation and Recovery Act (RCRA) Facility Assessment (RFA) of sites in the Aberdeen Area (AA) of APG. Recommendations from a draft RFA report suggested further investigations at the Fire Training Area (FT A). This study is in response to the recommendations. Three soil borings and twelve groundwater f!tOnitor wells were installed. Three rounds of groundwater sampling and analyses were conducted. APG lies in the Coastal Plain Physiographic Province which is underlain by sediments consisting of three major units, the Potomac Group, the Talbot Formation, and Recent (Holocene) sediments. The Lower Cretaceous sediments of the Potomac Group lie unconformably on the older Precambrian rocks. In the early 1960's fire training was initiated and training has been conducted as often as once a week. Trenches were ignited after being filled with oil and water. The exercises concluded in 1989. During the RFA shallow boring soil gas surveys were conducted for volatile organic compound (VOC) contamination at the FTA. Deeper borings were conducted for monitor wells and geologic mapping. Sampling and monitoring of groundwater, surface water, and soils was conducted. Analyses of groundwater from the monitor wells and two supply wells indicate the AFTA is contributing chemical contaminants to the upper aquifer, which is at a depth of approximately 30 feet below ground surface. VOC's were the only contaminants found in the groundwater that consistently exceeded established maximum contaminant (MCL) levels. Cadmium, lead, aod nickel exceeded established MCL values in at least one well in the three sample rounds. Surface water samples from the bermed pits and the separation pond contained cadmium, lead, methylene chloride, and benzene that exceeded MCL guidelines. Chromium, copper, lead, silver, and zinc in the surface water samples exceeded fresh and/or marine water quality criteria. Surface soil samples show guidelines were exceeded at one or more training areas. These guidelines were exceeded by cadmium, lead, zinc, mercury, silver, DDT, PCB-1248, and tetrachloroethane. Report recommendations include: (a.)Soil sampling to define the horizontal and vertical extent of soil contamination. (b.) Monitor wells should be installed to define the horizontal and vertical extent of groundwater contamination. (c.) Monitor wells should be installed between the AFf A and municipal water wells to determine the chemical characteristics of the groundwater. (d.) Quarterly monitoring of water levels in the wells should be conducted to determine any seasonal changes and groundwater gradients. (e.) Monitor wells should be analyzed for compounds on the Target Compound List and the Target Analyte List. (f.) Monitor wells should be analyzed for water quality parameters, oil and grease, and total recoverable hydrocarbons. Regulations, permissible contaminant levels, toxic and acute exposure limits, and other aspects cited in this report represent those pending at the time of the study. Those same limits and levels may not be current or accurate at the time of report publication. Note: This file is very large. Allow your browser several minutes to download the file.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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|TR-GL-92-20.pdf||42.48 MB||Adobe PDF|