Recent Developments At

ISGR/FPR Project in Indiana:

January 2006.   has completed a contract to install two Floating Product Removal wells and four In-Situ Groundwater Remediation wells at a gas station site in Indiana.  The two FPR wells were installed approximately 90 feet either side of a monitoring well that has had as much as three inches of floating gasoline.  All of the wells are installed offsite, in a residential neighborhood, with two of the wells installed in residential front yards next to a major city thoroughfare, two wells installed in residential back yards, and two wells installed in the parkway next to the street and partially in the sidewalk in front of two residences.

With their limited surface expression, FPR and ISGR wells are ideal for this residential setting.  The well installed in the sidewalk is wheel-chair friendly, presenting no obstruction to normal use of the sidewalk.  The absence of aboveground equipment is especially attractive for the installations in residential yards.

DDC Project in New York:

February 2006.  is assisting Wasatch Environmental (inventors of DDC technology) with a large pilot study and installation at the National Heatset Printing site on Long Island.  will provide all design work for the project, including design of sixty-horsepower, 700-cfm blower systems for the in-well stripping wells to be installed at the site. 

A one-well pilot DDC system will be installed in July of this year, with nine more wells to be installed later in the year.

Successful Floating Product Removal in Indiana:

March 2006.  Two Floating Product Removal wells were installed at a convenience store site in Indiana and began operations in December 2005 and January 2006.  Floating product had been detected in onsite and offsite wells in the past, but had not been seen, either onsite of offsite, for over two years. 

Five weeks after beginning operation, floating product (gasoline) had collected in the groundwater depression created by one of the FPR wells (ISGR/FPR-2) and was detected in the skimmer well.  (The skimmer pump was not installed at the client’s request.)  Using only a bailer, a field tech removed 4.5 gallons of gasoline from the skimmer well.  The next week another field tech removed 3.5 gallons of product, again with a bailer.  The third week, using a peristaltic pump, a third field tech removed 5 gallons of gasoline.  At the State’s request, the well will be bailed once more, next week.  If gasoline is still present, the skimmer pump will be installed and full-time removal of floating product will begin.

The photograph shows the installation.  ISGR/FPR-2 is beneath the Bilco doors in the front yard.  This residence also has an ISGR well (ISGR-4; no floating product capability) in the back yard.  That well has been operating since August 2004.  With no aboveground equipment, no noise, and no effluent, the system is entirely unobjectionable.  So much so that the property owner consented to let us install ISGR/FPR-2 in the front yard.  Recently the carbon was changed out (1,500 lb) at ISGR-4, after eleven months of operation. The average influent levels for the eleven-month period are given below.  All effluent samples have been non-detect.

FPR is a much more aggressive and effective means for capture and removal of floating product than skimmer wells.  Much higher removal rates are possible, without extracting any water from the aquifer.

Updated Brochure Online:

April 2006.  An updated version of our complete brochure is now available online in .pdf format.  The brochure has been in use for several years, periodically updated to provide increasing amounts of information on the technologies we use and the experience of the firm.  The brochure now covers Blowerless Air Sparging, Blowerless In-Well Stripping, and Dissolved Oxygen Enhancement technologies.

Final Patent Issued by US Patent Office (FPR)

January 2007. On January 2, 2007, the US Patent Office issued patent 7,156,988 to Steven L. Wilhelm for Floating Product Removal (FPR) technology. The use of a recirculating well to create a physical depression in the groundwater surface allows much more rapid recovery and removal of floating products than use of a skimmer pump without such a depression. FPR involves no extraction of groundwater from the aquifer and thus involves no discharge challenges, permits, or costs.

FreeOx™ Now Available for 2-Inch Wells

January 2007. A design innovation now makes it possible to install FreeOx™ in wells as small as Schedule 40 2-inch (i.d. 2.067”). FreeOx™ can be installed in most existing wells, including the new 2-inch model. Shipment of 2-inch FreeOX™ systems will begin in March 2006.