The Entech Group uses advanced biotechnologies for soil and groundwater remediation that eliminate the need for excavation. These in-situ solutions substantially reduce costs and risks of damage to structures from contamination. The company has overseen successful remediation projects using injection of products like nano-iron, oxygen release compound, and hydrogen release compound to treat contamination from petroleum, chlorinated solvents, and metals. Entech continues developing effective remediation methods and targeting specific contaminants.

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The Al
Here at The Entech Group, Inc., our staff of environmental professionals has sought out the most
technologically advanced remediation process available in the market today. It is our goal to
help your remediation project advance quickly with minimal cost. By eliminating the need for
traditional soil and/or groundwater remediation via excavation, these high powered
biotechnologies eradicate even the hardest to reach contamination plumes. These -
place) solutions have been proven to substantially reduce the cost of difficult remediation
projects as well as reduce the risk of structural damage to residential and commercial structures
where contamination has flowed under such structures. The following photos demonstrate the
traditional underpinning process and the structural damage it can cause.
The Entech Group, Inc. * 400 Morris Ave. Denville, NJ 07834 * Ph: 800-571-8661 * Fax: 973-586-8663 * www.entechgroupinc.com

2. The above images show the capability to inject within the dwelling floor as well as below the
dwelling via angled direct push borings.
The Entech Group, Inc. has overseen successful in-situ remediation projects and continues to
stay on the cutting edge of the newest and most effective alternate remediation methods. The
following products can all be injected into the subsurface via direct push apparatus and each
have a specific contaminant that they target (petroleum products, chlorinated solvents, metals,
etc.).
*Nano-iron is a reagent that is typically used to remediate subsurface environmental
contaminants on an in situ basis. Nano-iron is a water suspension of extremely small elemental
iron particles. Thus, nano-iron is essentially a natural formulation, which is composed almost
totally of iron - the most common metal on earth.

3. The nano-iron is injected into the contaminated source or groundwater plume areas via gravity or
under pressure. It remains suspended in the groundwater for long periods, and travels with the
groundwater to destroy contaminants such as chlorinated hydrocarbons, nitroaromatics,
pesticides and certain toxic metal ions, such as hexavalent chromium.
*Oxygen Release Compound (O R C®) is a formulation of phosphate-intercalated magnesium
peroxide that when hydrated, produces a controlled release of oxygen for periods of up to 12
months on a single application.
Purpose: To supply a controlled release of oxygen to accelerate the slow rate of naturally
occurring aerobic contaminant biodegradation in groundwater and saturated soils.
F unctionality: ORC is typically applied using direct-injection techniques. This process requires
ORC to be mixed with water to form an injectable slurry which is then pressure injected (using a
pump), into the zone of contamination. Once in the aquifer, tiny ORC particles can sorb to or
reside in the soil matrix and produce a controlled release of oxygen for periods of up to 1 year.
ORC is also available in 2", 4" and 6" filter socks that can be emplaced in wells and removed
when exhausted. Upon removal, the old socks can be replaced to restore the oxygen supply and
maintain aerobic biodegradation as needed.
*Hydrogen Released Compound (H RC) is a controlled release, electron donor material, that
when hydrated is specifically designed to produce a controlled release of lactic acid. The newly
available lactic acid is critical for the production of hydrogen to fuel anaerobic biodegradation
processes in soil and groundwater.
Purpose: To make available time release lactic acid for fermentation by subsurface microbes
that in turn generates hydrogen. Hydrogen is the key ingredient in the anaerobic contaminant
degrading process known as reductive dechlorination. Reductive dechlorination is the
mechanism by which chlorinated compounds are biodegraded into less harmful constituents such
as ethene and ethane.

4. F unctionality: HRC is typically applied using direct-injection techniques. This process enables
the viscous HRC material to be pressure injected into the zone of contamination and moved out
into the aquifer media. Once in the subsurface, HRC can reside within the soil matrix fueling
reductive dechlorination and promoting reducing aquifer conditions for periods of up to 24
months or longer through the controlled release of lactic acid and subsequent hydrogen
production.
*RegenOx is an advanced chemical oxidation technology that destroys contaminants through
powerful, yet controlled chemical reactions and not through biological means. This product
maximizes in situ performance while using a solid alkaline oxidant that employs a sodium
percarbonate complex with a multi-part catalytic formula. RegenOx directly oxidizes
contaminants while its unique catalytic component generates a range of highly oxidizing free
radicals that rapidly and effectively destroy a range of target contaminants.
Purpose: To rapidly and effectively destroy target contaminants in high concentration source
areas in the saturated and vadose zones. Also to allow for a seamless transition to enhanced
bioremediation.
F unctionality: A RegenOx application will remove significant amounts of contamination from
the subsurface and is typically applied using direct-injection techniques. The application process
enables the two part product to be combined, and then pressure injected into the zone of
contamination and moved out into the aquifer media. Once in the subsurface, RegenOx produces
a cascade of efficient oxidation reactions via a number of mechanisms including: surface
mediated oxidation, direct oxidation and free radical oxidation. These reactions destroy a range
of contaminants and can be propagated in the presence of RegenOx for periods of up to 30 days
on a single injection. RegenOx produces minimal heat and is highly compatible with follow-on
enhanced bioremediation applications.
*Bio-Dechlor I N O C U L U M ® is an enriched natural microbial consortium containing species of
Dehalococcoides sp. (DHC). This microbial consortium has since been enriched to increase its
ability to rapidly dechlorinate contaminants during in situ bioremediation processes. Bio-Dechlor
INOCULUM has been shown to stimulate the rapid and complete dechlorination of compounds
such as tetrachloroethene (PCE), trichloroethene (TCE), dichloroethene (DCE), and vinyl
chloride (VC). The most current culture of Bio Dechlor INOCULUM PLUS(+) now contains

5. microbes capable of dehalogenating halomethanes (e.g. carbon tetrachloride and chloroform) and
haloethanes (e.g. 1,1,1 TCA and 1,1, DCA) as well as mixtures of these halogenated
contaminants.
Bio-Dechlor I N O C U L U M® PL US(+) is provided in a liquid form and is designed to be
injected directly into the contaminated subsurface. Once in place, this microbial consortium
works to accelerate the extant rate of chlorinated ethene degradation. When faced with an
insufficient quantity of critical dechlorinating microbes, Bio-Dechlor INOCULUM PLUS(+)
supplies many beneficial chlorinated solvent degraders including the all important DHC required
to achieve complete and rapid dechlorination.
This microbial consortium is compatible with most electron donors however it is often optimized
with the addition of any of Regenesis' Hydrogen Release Compound (HRC®) products
*Metals Remediation Compound M R C is supplied as a viscous liquid for direct injection into
contaminated and saturated soils. The material itself is very much like HRC. This product is
comprised of a polylactate polymer and a benign organosulfur compound, (BOC) allowing for a
controlled release of its active components for long-term. hexavalent chromium (Cr VI) and
chlorinated solvent removal. For Cr VI remediation with MRC, Cr VI is directly precipitated as a
hydroxide. The hydroxide solids tend to be stable under low redox potential and oxidizing
conditions.
MRC also has the ability to foster the direct reduction of metals like chromium- these metals
will precipitate as hydroxides and oxides upon the reduction of their oxidized forms. Since MRC
contains a polylactate polymer, reductive dechlorination can be enhanced by the available
electron donor and carbon source.
T reatable Metals
Hexavalent Chromium.

6. *Nano-O x® (nano-scale peroxide)
No excavation or structural underpinning needed. Advantages of using Nano-Ox® for soil and
groundwater contaminated with any petroleum hydrocarbons. Injection is performed through 1
to 1.25 inch holes in soil or paving. Soil and paving resealed at the end of the day with almost
no disruption of lawns. The number of points installed is 5-20 injection points per day
depending on the soil conditions, access, and depth of treatment needed. There is no limit to the
depth that is treatable as long as a monitoring well or injection point can be installed to the depth.
Process will continue bioremediation for up to 6 months if necessary. Petroleum odors
eliminated within minutes of injection or application.
*Nano-iron is a registered TM of Lehigh Nanotech
*MRC is a registered TM of Regenesis
*Bio-Dechlor is a registered TM of Regenesis
*Regen is a registered TM of Regenesis
*HRC is a registered TM of Regenesis
*OCR is a registered TM of Regenesis
*Nano-Ox is a registered TM of Continental Remediation
The Entech Group, Inc. * 400 Morris Ave. Denville, NJ 07834 * Ph: 800-571-8661 * Fax: 973-586-8663 * www.entechgroupinc.com