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Multi-Level Bundled Nested Well

The most flexible and cost effective alternative for three dimensional ground water quality monitoring. Multi-Level Bundled Nested Wells have been installed in unconsolidated sediments to depth exceeding 375 feet adjacent to impacted public drinking water supply wells. Constructed of Schedule 40 PVC, Multi-Level Bundled Nested Wells have been accepted by, and installed for, regulatory agencies from New York and Delaware through Wisconsin and Kansas.

Key Benefits

bulletMore cost effective than other alternatives
bulletInstalled via conventional well completion methodologies
bulletSuited for conventional well development techniques
bulletSuited for hydraulic measurement and testing
bulletSuited for gamma logging
bulletConstruction materials are readily available
bulletDurable for decades
bulletProven to produce reliable and reproducible samples for water quality analysis at depths to water in excess of 80 feet below land surface

 

Why consider 3D characterization?

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The US EPA indicates that there are some fairly common situations where we would expect a plume of petroleum hydrocarbons to move vertically into the aquifer— http://www.epa.gov/nerl/mtbe/plume_diving.pd

 

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The American Petroleum Institute indicates that detailed plume definition may be necessary at an oxygenate release site that affects a sole-source drinking water aquifer, in order to ensure that corrective actions are effective. A detailed level of assessment would typically include depth-discrete soil samples, and multi-level, short-screened wells for vertical and horizontal dissolved chemical delineation.- http://api-ep.api.org/filelibrary/4699c.pdf#search='API%20MTBE%20Characterization

 

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The State of California indicates that if the conceptual site model using regional data implies that persistent downward vertical groundwater gradients may exist, these gradients and the vertical extent of MTBE impacts should be investigated using cluster wells or other methods. http://www.swrcb.ca.gov/ust/cleanup/docs/mtbe_finaldraft.pdf

 

Background of MLBNWs

In 1992 the first Multi-Level Bundled Nested Wells (MLBNWs) were designed, developed and deployed by J. E. Haas. The wells were deployed to facilitate the cost effective collection of 3-dimensional hydro-geologic data of sufficient volumetric resolution to successfully track plumes of contaminated ground water from contaminated drinking water wells back to their sources. Since 1992 thousands of MLBNWs have been deployed at hundreds of sites across the United States where they are increasingly referred to as "Haas Wells".

Download a scaled drawing

Download informational flyer on MLBNWs containing additional specifications

 

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Links

EnviroCourses.org

Long Island Groundwater Research Institute (LIGRI)

American Institute of Hydrology

FuelOxRem.com

 

Send mail to jeh714@optonline.net with questions or comments about this web site.