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Announcements By Date:
January 2008 MS Word Document
April 2009 MS Word Document
October 2010 MS Word Document
Ongoing Developments:
New addition to the FLUTe service to ground water measurements:
Hydraulic Conductivity Profiler®Many customers use our FLUTe blank liner to seal a borehole immediately after it is completed. Now we can measure the blank liner descent rate during the normal installation and obtain a conductivity profile of the entire hole. This is particularly useful for the identification of the major flow paths from the hole which are used for definition of the sampling intervals for the Water FLUTe multi level sampling system.
Other measurements such as the gamma log, acoustic televiewer, and the induction coupled electric log can be run in the protected interior of the blank liner while the hole is sealed against vertical migration. This data can be used to select additional sampling intervals for the Water FLUTe multi level sampling system. After the Water FLUTe is fabricated to specification, the sealing blank liner is pulled, and the multi level sampling liner system is fully emplaced in the same day. This greatly limits any vertical migration in the hole and provides high quality head and contamination profiles with the minimum risk of contaminant spread due to the borehole.
The traditional practice of open hole straddle packer testing, open hole logging, and straddle packer multi level systems is usually much more expensive, and associated with the uncertainties due to flow in the open portions of the hole.
Contact FLUTe at
and request a descriptive paper on the Hydraulic Conductivity Profiler® technique with field test results. Ask for a quote for your job.
NAPL FLUTe to new heights and depths The color reactive detection of pure product DNAPLs has reached new heights in the variety of installations. The recent deployment through a sonic casing at Redstone Arsenal adds a third method to the NAPL FLUTe installation procedure. The sonic casing was driven to depth, the liner assembly inserted, and the casing was withdrawn while the liner dilated to support the hole. Later the liner is inverted from the hole to examine the reactive outer covering. The most common installation is through pushrods like cone penetrometers or Geoprobes. A second installation method is via eversion into stable cored or drilled holes. A recent installation of 5 NAPL FLUTe systems to 110 ft. via cone penetrometer in Davis, CA is a new record depth for push rod installation with complete recovery. The sonic casing installation now allows NAPL FLUTe use throughout the full range of shallow sediments, unstable weathered rock, and deeper cored rock for detection of DNAPL free product. The NAPL FLUTe method of installation is being extended to a variety of other FLUTe systems.
Photo shows: DNAPL stains on NAPL FLUTe
Monitoring under landfills is getting easier
A recent pilot test of a FLUTe design called Liner Augmentation of Horizontal Drilling (LAHD) has revived a technology which was sitting on the back burner. FLUTe holds four patents on the LAHD technique which is used to emplace sampling ports (a modified Water FLUTe system) and other instruments under a landfill. The plan is to install up to 27 horizontal sampling arrays beneath the landfill to map DNAPL contamination. The technique is described at LAHD system. The essence of the method is to follow a reamer with an everting liner through a horizontal hole. No casing is involved. The ~400 ft liner supports the hole, forces the mud and cuttings out of the pilot hole, and emplaces sampling ports all in one pass. The result is a clean hole, relatively free of mud, and very detailed sampling capability. The same holes can be later used for other purposes such as remediation. This application greatly extends the hole length and depth beyond the previous tests. Detailed photos of the installation are available at LAHD system.
