INTEX Environmental provides complete design/build remediation services. We specialize in providing a complete package which often must fit into a small space or be installed in conjunction with a larger general construction project. INTEX Environmental has installed and operated remediation systems in retail store basements, under supermarkets, in the ceilings of warehouses, in vaults beneath roadways and in many gas stations and industrial facilities.

INTEX Environmental often works as a subcontractor to other consulting firms, providing on-site representation, design assistance, and construction/operation services. We have installed and operated several hundred remediation systems, making use of a myriad of technologies including air sparge, vapor extraction, pump and treat, bioremediation, total fluids extraction, oxygen release compound and in-situ oxidization.

Projects that require the application of intensive remedial technologies such as dewatering, stabilization and soil washing are engineered by INTEX Environmental.

INTEX Environmental maintains an extensive stock of vehicles, tools, pumps, surveying equipment, sampling supplies, and monitoring instruments (photoionization detectors, organic vapor analyzers, interface probes, etc.) to support the company's field activities. If an item is needed that is not in stock, INTEX Environmental has the ability to lease equipment on short notice.

For a sampling alternative, INTEX Environmental owns two GeoProbeŽ units (truck-mounted hydraulic drive drills) which can quickly and efficiently collect soil, soil gas, and groundwater samples. These units are particularly useful as an initial screening method in site investigations to quickly assess the presence/extent of a contaminant plume without the expense of multiple drilling phases and unnecessary monitor well installations. These units are also useful for installing injection points for bioremediation media, hydrogen peroxides, oxygen release compound, etc.

If remediation is necessary at a site, INTEX Environmental owns mobile trailer-based systems that offer the most convenient and cost-effective means of conducting extraction pilot tests and groundwater treatment. The testing trailers contain extraction equipment (submersible pumps, regenerative blowers, liquid ring pumps, etc.), measurement devices, and storage and treatment equipment that can handle a variety of site conditions, flowrates, and compounds. This equipment, which can be mobilized on short notice, can provide the data critical to the design of efficient, optimally operated remedial systems.

INTEX Environmental's groundwater treatment trailers provide a variety of pumping and fluid extraction methods for spill response, pit dewatering, and vapor-control to support short-term site remedial activities. These trailers contain several storage and separation vessels as well as remediation equipment for carbon absorption, air stripping, and air sparging/aeration for the most volatile chemicals. INTEX Environmental has solid experience in obtaining necessary air and water discharge permits so that pumped water can be handled and discharged without the added costs of off-site removal.

In addition to INTEX Environmental's mobile systems, the company has constructed several large-scale, long-term remediation systems. These systems encompass many sophisticated, state-of-the-art remedial designs including groundwater, product, and soil vapor extraction; bioremediation; carbon adsorption; and air stripping. Carefully designed field monitoring and maintenance programs ensure that each system operates at optimum capacity and achieves clean-up in the shortest time possible.

INTEX Environmental owns a variety of highly mobile geophysical equipment including electrical resistivity sets, proton precession magnetometers and gradiometers, electromagnetic units, seismic units, ground penetrating radar and microgravity units, and downhole equipment.

INTEX Environmental provides comprehensive underground/aboveground and bulk storage tank contracting and remediation services, having over ten years experience with tank systems of all sizes.

• On-Site Remediation
• Abatement plans
• Emergency response
• Remedial investigations/feasibility studies
• Design, installation, and implementation of contaminant withdrawal systems
• Design, construction, operation, and maintenance of remediation systems (long-term, full-scale installations, or short-term, mobile trailer-based systems)
• In-situ and ex-situ bioremediation
• Soil venting and vapor extraction
• High vacuum extraction
• Isolation and encapsulation
• Re-circulated pump and treat
• Carbon adsorption
• Thermal desorption
• Air stripping
• Air sparging/aeration
• Petro-trap passive recovery systems
• In-situ Oxidation (Fentons)

GROUNDWATER AND SOIL REMEDIATION

Toms River, NJ
INTEX Environmental designed, built and currently operates a 55-gpm groundwater treatment system in Ocean County, New Jersey. The system was installed to prevent a plume of heating oil from entering a creek directly upstream from the Toms River tidal estuary. The system consists of 320 feet of subsurface barrier wall along the stream bank, five shallow groundwater/product extraction wells, a 55-gpm oil water separator with carbon polishing and combination groundwater injection/surface water discharge.

Philadelphia, PA
INTEX Environmental designed, installed and operated a free product recovery system at the Southeast Pennsylvania Transit Authority maintenance yard in center city to remove several feet of gasoline floating on the water table. The system consisted of five product extraction wells with free product pumps leading into a product/water separator and two product and water collection tanks.

IN-SITU SOIL REMEDIATION

Middletown, NY
INTEX Environmental designed, installed and currently operates a 300 cfm soil vapor extraction system at an active manufacturing facility. The treatment system was prefabricated at INTEX Environmental's shop and built into a trailer unit and later connected to on-site piping leading from six soil vapor extraction wells.

Queens, NY
INTEX Environmental designed and installed a free product recovery system remove #4 fuel oil in the soil at a fuel distribution facility. The system consisted of a heavy traffic rated vault containing a large belt skimmer, product container and heat source to reduce the oil viscosity. The system was so successful that several more systems are scheduled to be installed.

Trenton, NJ
Residual contaminated groundwater remained at this industrial site several years after the removal of a leaking gasoline underground storage tank. In order to avoid a lengthy groundwater cleanup, INTEX Environmental injected a strong hydrogen peroxide solution directly into the soil and groundwater in order to oxidize the remaining hydrocarbons. Two hydrogen peroxide injections reduced the hydrocarbons to levels such that only monitoring was required by the regulating agencies.

COMBINATION SOIL / GROUNDWATER REMEDIATION

Superfund Site, NC
This Superfund site was wood treating facility using a commercial creosote-based wood treating compound. The facility operated a pressure treating operation for over 15 years. The 30-acre facility formerly was a limestone cutting operation, producing limestone block and slabs from locally quarried materials. In-situ bioremediation was the primary remedial treatment.

The remedial/removal action consisted of three principal tasks: 1) Removal of tanks and drums containing product and removal of the highly contaminated soil for off-site disposal; 2) Excavation and bioremediation of contaminated soils using composting beds augmented with air injection and supplemental nutrients; and 3) Soil flushing, in-situ groundwater treatment, and ex-situ groundwater treatment. In Phase 2, consulting services were provided to design the composting cells, including underdrains, air injection, nutrient addition, and composting performance evaluation. The bioremediation/composting cells were designed to treat approximately 20,000 cubic yards of contaminated soil. The cells were staged on a clay liner circled with a 6-foot high berm. A sump was installed in the low corner of the composting area with an ejector pump sized to handle the 1 inch per hour storm event. Storm water runoff from the composting cells was pumped to the aerated lagoon system for treatment. The composting cells were 45 feet wide at the base, 20 feet wide at the top, 24 feet high, and 240 feet long.

LANDFILL REMEDIATION

Pottstown, PA
INTEX Environmental provided rapid response to a municipal waste landfill which was under orders from the state to immediately mitigate the migration of methane into a residential area. INTEX Environmental conducted a soil gas survey to determine the location of the methane release, performed an on-site pilot test to size a collection and remediation system, and provided remedial designs to the landfill owners and state within the required time frame.

TECHNICAL CONTRACTING

Bronx, NY
INTEX Environmental provided design assistance, construction oversight and on-site project management for the installation of a free product collection system at a former fuel distribution facility and the location of a future supermarket. The installation consisted of numerous extraction and reinjection trenches, subsurface barrier wall and multiple piping. All work had to be coordinated with several other construction activities taking place on the site.

Scarsdale, New York
INTEX Environmental was contacted by an engineering consulting firm to perform subsurface remediation beneath the floor of a former dry cleaning facility that had experienced significant releases of tetrachloroethylene. The first task consisted of the removal of the concrete floor slab and excavation of highly impacted soil. Due to limited space and headroom, all work had to be performed using miniature excavation equipment or by hand.

When excavation was completed, a system of soil vapor extraction laterals was installed prior to backfilling for further removal of residual volatile organics.

Superfund Site, King of Prussia, Pa.
INTEX Environmental was contracted by an engineering consulting firm to perform the cleanout and characterization of an abandoned hazardous waste injection well. The first phase of the project consisted of extending the well casing from the bottom of a 30 foot vault, up to the ground surface. The inside of the building in which the well was located was encapsulated in plastic and a containment berm installed around the well. A low clearance air rotary drilling rig was used to clean sludge and debris from the well bore, scour the walls of the borehole and redevelop the well. All work has to be performed in Level B personal protection due to extremely high concentration of volatile organics in the material removed from the well.

Following redevelopment, downhole television camera and downhole geophysical surveys were performed on the injection well and surrounding monitoring wells.