Hilltop Enterprises is a full-service soil remediation and removal service company. We combine our expertise in contaminated soil remediation solutions with removal experience and resources to handle every need and every phase of the process.

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Hilltop Enterprises has the unique capability of accessing and utilizing several advanced remediation technologies, offering a wide scope of options for its clients.

Thermally Enhanced Soil Vapor Extraction (TEVE)

Description of Unit:
The Thermally Enhanced Soil Vapor Extraction (TEVE) system is an onsite technique for the removal and destruction of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) from excavated soil. The TEVE process consists of a soil pile constructed with excavated soil, air distribution piping and an impermeable membrane cover. The major components of the system are a vapor blower, an air recovery blower, a burn chamber and a catalytic reactor bank. The entire unit is custom built into a twenty-four foot (24') enclosed trailer.

Scope of Work:
An impermeable membrane liner with a perimeter curb is placed on the ground. Contaminated soil is placed on the liner. The initial lift of soil is approximately one foot (1') to three feet (3') thick. Heated air distribution piping is then positioned on top of the initial soft lift. The second lift layer is approximately three feet (3') to four feet (4') of contaminated soil. Heated air distribution piping is then positioned on top of the second soil lift. The final lift of contaminated soil is approximately one foot (1') to three feet (3') thick. The treatment soil pile typically contains approximately one-thousand (1,000) tons of contaminated soil. The dimensions of the soil pile are typically forty feet (40') wide by eighty feet (80') in length.

On top of the soil pile, vapor recovery piping is installed to collect the emissions that emanate from the soil pile. The soil pile is then covered with the same impermeable liner material. The cover serves to limit the emission of VOCs, prevent infiltration of moisture and provide a dust control measure.

Heated air is blown into the soil pile, passing through the soil, volatizing the contaminants and exiting the pile through the vapor extraction piping. The collected vapors are then passed through a burn chamber where contaminant destruction occurs.

The burn chamber operates at 1,800 degrees Fahrenheit (°F) with a residence time of 0.5 seconds. From the burn chamber, the air is re-injected into the soil pile. Ten percent (10%) of the air stream is exhausted through three catalytic oxidizers manfolded in parallel in a four inch (4") exhaust stack, or other appropriate scrubbing device further assuring that contaminants or particulates are not exhausted to the atmosphere.

Controlled heated air is injected into the soil pile at a temperature ranging up to 750°F and at 3,500 cubic feet per minute (CFM). Based on these operating conditions, the soil temperature can be elevated from ambient temperature to between 150°F and 450°F. The soil is treated at these conditions until cleanup objectives are met. Cleanup objectives are typically accomplished in four to seven days.

Confirmatory soil samples are collected and analyzed to verify that remediation objectives have been met. Also, continuous air monitoring of the extracted vapors ensures that proper destruction is achieved and that air emission limits for the exhaust are not exceeded.

Lead Stabilization

Hilltop Enterprises, Inc. (HEI) collaborates with another environmental services company, which provides state-of-the-art, patented heavy metals stabilization technologies and remedial services in the United States and abroad.

This partner company holds the rights to the formation of complexed heavy metal minerals, including the safest minerals known to man such as chloropyromorphite, a Pb mineral that is 10E50 times less soluble than simple compounds offered by others.

The patented stabilization chemical recipes and process designs are superior to conventional chemicals (simple phosphates, lime, cement, silicates) and methods.

Since 1999 this company has provided industry, government, and remedial contractors with easy, safe, and low-cost solutions to their heavy metals contamination projects. Their experience ranges from design and installation of heavy metals stabilization systems at fixed facilities to full-scale remedial projects.

The technology has been installed at over 50 industrial facilities, applied at 100+ remedial projects, and utilized in 1000+ treatabilities. The technology has never failed to produce successful results. From leaded paint and Pb-contaminated soils, to As and Cr(6) sludges, they are able to offer the best available stabilization technology in the world.

These patented technologies have been permitted under USEPA, state RCRA and CERCLA criteria, and have been selected by numerous contractors and agencies as the most cost-effective demonstrated and patented heavy metals stabilization technology available.

Catalysts

This Catalytic Process is an efficient treatment procedure for recalcitrant organic compounds. The process is based upon the finding that a certain organic catalyst plus a variety of oxidizing compounds including calcium, magnesium and hydrogen peroxide, ozone, persulphate or permanganate can be employed to degrade recalcitrant organic compounds within soil and/or water. With this technique, wastewater, groundwater, or soil containing organic contaminants having at least one oxidizable aliphatic or aromatic functional group can be completely oxidized on contact. A broad list of treatable chemicals would include selected pesticides, petroleum hydrocarbons, complex cyanides and chlorinated solvents. Included in the list of readily treatable chemicals are such notable contaminants as MtBE, TCE, BTEX, and PCE.

The catalyst is EPA TSCA approved for safe use within the environment. The catalyst is a complex organic compound which, when combined with selected oxidizing agents, rapidly generates significant quantities of free hydroxyl radicals. Importantly, the process works over a range of pH from 6 to 10. With the correct amount of oxidant, the target organic compound(s) and catalyst are consumed in the process leaving only CO2, salts and water as final products with complete oxidation. Importantly, it is a rare occurrence that the process generates noticeable sludge in water treatment applications.

The process can be employed in a variety of ways and is easily adaptable to existing treatment systems. The contact time for the oxidation process to occur is short, varying from a few minutes to 3 hours, depending on the nature of the targeted compound(s).

The process can replace existing oxidative wastewater treatment systems of any size. Importantly, catalyst based treatment systems are usually more efficient and provide for lower cost than competing oxidation treatment systems. A catalyst system requires no materials of special construction and power requirements are absolutely minimal. The design is simple. Metered injection of the ingredients, rapid in-line mixing, and adequate retention time are the primary design criteria.