JAG Consulting Group, Inc.

02/24/2016

Patent Announcement

On February 16, 2016, the United States Patent and Trademark Office issued US Patent No. 9,259,771 to JAG Consulting Group, Inc. for the use of temperature controlled stabilized hydrogen peroxide (SHP) for the in-situ chemical oxidation (ISCO) treatment of VOCs. The patented technology uses a stabilizer compound (a carboxylate salt) to extend the persistence of peroxide to 7 to 10 days and thereby allows more time for dispersion of peroxide into the subsurface and increases the overall treatment effectiveness of VOCs. Additionally, by slowing down the normal rapid decomposition of peroxide, the SHP technology is able to control the increase of subsurface temperature and pressure and provide an added margin of safety during field injections.

The SHP technology provides a vast improvement to the conventional use of catalyzed hydrogen peroxide (i.e., Fenton's reaction), which is an extremely short-lived process (with a peroxide persistence of less than 24 hours) and produces excessive heat due to the highly exothermic reaction and gives off large volumes of oxygen gas. An adverse side effect typical of all catalyzed peroxide injections is the resulting daylighting of chemicals. The catalyzed peroxide reaction, however, can be slowed down by use of a stabilizer compound, such as sodium citrate or sodium phytate. The stabilizer compound acts as a chelating agent which slows down the catalyzation of peroxide by reducing the contact of peroxide with iron and manganese minerals, which are naturally occurring in the subsurface. A laboratory Bench Scale test is typically performed to determine the relative amount of stabilizer required to extend the persistence of the peroxide to 7 to 10 days. However, due to high variability of iron and manganese levels in the soil, the persistence of the peroxide in the field can vary widely from the laboratory results.

In the field, the catalytic peroxide reaction can be manipulated by increasing the stabilizer dose to extend the persistence of the peroxide while also controlling the temperature and reducing the rapid pressure increase. The slowed reaction helps to minimize the field conditions responsible for daylighting of chemicals, which is a key safety consideration for all ISCO projects. The stabilized peroxide technology allows the injection contractor to control the subsurface temperature increase to approximately 120-125 degrees Fahrenheit and minimizes the subsurface pressure buildup, which virtually eliminates the occurrence of chemical daylighting. Stabilized peroxide can also eliminate the subsurface pressure buildup that can result in property damage caused by buckling of concrete slabs and bulging beneath asphalt surfaces.

Stabilized hydrogen peroxide provides superior results compared to other chemical oxidants, such as sodium persulfate and potassium permanganate, due to peroxide's superior oxidation power, lower cost of chemical treatment (both chemical costs and field injection labor), and its minimal impact on secondary water quality parameters such as TDS levels, sodium levels, and sulfate/manganese levels.

Other advantages of using SHP include:

• The controlled temperature increase (to 120-125 degrees F) of SHP is still sufficient to promote the effective desorption of VOC mass from the soil and conversion to the dissolved phase where it can be destroyed.

• SHP is effective in the removal of small quantities of LNAPL and/or DNAPL (free phase product) which may be present at the site.

• Peroxide's superior oxidizing power is due to the production of Hydroxyl radicals, the strongest of all oxidation radicals. In addition, Superoxide radicals and Hydroperoxide radicals are also produced which vastly improves the overall oxidation power of peroxide.

• Peroxide is highly effective in treatment of many recalcitrant compounds, such as 1,4-dioxane, chlorinated ethanes (TCA, DCA), carbon tetrachloride, pentachlorophenol (P*P), trichlorobenzene, MTBE, TBA, PAHs, PCBs, chlorinated pesticides, and other VOCs.

• No daughter products are produced during peroxide oxidation as petroleum and chlorinated contaminants are completely mineralized to carbon dioxide, water, and chloride ions.

JAG anticipates that a License Agreement will be required for users of Temperature Controlled SHP. More details on the licensing agreement will be forthcoming in the next few months.

For more information, contact Gary Cronk at 714-241-7722 or via email at [email protected]

08/10/2010

News
Release: Completion of Large Chemical Oxidation Injection Project in
Northern California.
Last month, JAG Consulting completed its largest
chemical oxidation injection project to date. The project was a 41-day
chemical oxidation treatment of the groundwater beneath a former Navy
site in Northern California. The ...chemical
oxidation process involved the use of ferrous iron activation of sodium
persulfate (Klozur). The ferrous iron activation was selected as the
optimal ISCO technology because of its treatment effectiveness on
chlorinated hydrocarbons, the rapid cleanup timeframe, and its relative
low cost application. The chemicals of concern in the groundwater were
PCE, TCE, 1,2-DCE, vinyl chloride, chlorobenzene, and dichlorobenzenes.


JAG Consulting’s scope of services included performing chemical
injections at 255 direct push boring locations, including several
locations inside an aircraft hangar building. Due to the presence of
shallow groundwater (3 feet bgs) and continuing problems with chemical
daylighting, JAG Consulting came up with a solution to the problem by
construction of temporary small diameter injection wells in each direct
push borehole. This allowed for injection of the chemicals at lower
pressures, which eliminated chemical daylighting.

Over the
course of this chemical oxidation project, a total of 75,000 pounds of
sodium persulfate and 15,000 pounds of ferrous sulfate were mixed into
solution and injected into the groundwater. Sampling of the monitoring
wells within the treatment zones is scheduled for later this month and
the results should confirm significant reductions in VOCs.

08/06/2010

News Release.

Vadose Zone Treatment Using Chemical Oxidation Receives No Further Action Determination from Regulatory Agency. In 2009, JAG Consulting Group completed an in-situ chemical oxidation injection at an active industrial site near Chicago, Illinois to treat the shallow soil contaminated with PCE, TCE, methylen...e chloride, toluene, and xylenes. Use of sodium hydroxide (caustic) provided the high pH activation of sodium persulfate. High pH activation was selected as the optimal ISCO technology because of its treatment effectiveness on both chlorinated and petroleum hydrocarbons, the rapid cleanup timeframe, and its relative low cost application.



Prior to the field injections, JAG Consulting performed a soil buffering test in the laboratory in order to determine the amount of sodium hydroxide needed to raise the pH of the soil to above 10.5 pH units and maintain it for 2 weeks.



Because chemical oxidation requires an aqueous media for dispersion of the oxidants, an infiltration gallery was constructed to slowly percolate water into the shallow soil (1 to 15 ft) to create saturated soil conditions. The full scale field injection consisted of 12 injection wells located in two Treatment Areas. Due to the low permeability silts and clays, each injection well had an estimated radius of influence of only 10 feet. Approximately 4,700 gallons of sodium hydroxide (25%) and 11,500 pounds of sodium persulfate were injected into the wells.



The following results were achieved in this ISCO project:

·Analytical sampling results indicate that PCE, TCE, methylene chloride, xylenes, and toluene levels were generally reduced from 88% to 99% within 6 months following treatment.

·The ISCO injections attained the soil cleanup criteria established by the State of Illinois EPA and “No Further Action” was granted for Area #1 and Area #2 in 2009.

08/03/2010