T. M. Gates, Inc

T. M . Gates, Inc.

Environmental and Sanitary Wastewater Consultants

Disposal Treatment Remediation

After the concentration and extent of the soil and/or groundwater contamination has been ascertained, T. M. Gates, Inc. has a variety of treatment or disposal strategies that can be implemented. T. M. Gates, Inc. designs, builds, and if necessary maintains soil and ground water system that they install. The advantage T. M. Gates, Inc. has over other consulting firms is the ability to design and build the treatment systems using T. M. Gates, Inc. personnel. By eliminating the bidding process and multiple subcontractors, T. M. Gates, Inc. field crews can recognize and implement "in-field" treatment system modifications, which can significantly decrease the overall project cost. Some of the treatment and disposal options that T. M. Gates, Inc. have designed and installed include the following:

SOIL DISPOSAL

Some contaminated sites require soil disposal. T. M. Gates, Inc. recommends soil disposal if there are small amounts of non-hazardous soil (small gas stations or spills), or if treating the contaminated on-site is not economically viable (PCBs or heavy metals). Disposing or recycling the contaminated soil off-site allows the property to be cleaned up and reused or sold relatively quickly. If soil disposal or recycling is necessary, T. M. Gates, Inc. can load the soil and coordinate transport and disposal at various facilities across the United States.

AIR SPARGING

Air sparging is an effective treatment technology that allows in-situ bioremediation. Air sparging simply injects ambient air into the soil. This process supplies oxygen to the microorganisms and provides some stripping of contaminants from the soil. T. M. Gates, Inc. has installed air sparging systems at a variety of sites with hazardous and non-hazardous soil contamination. These systems require very little maintenance and are easy to operate.

Air strippers are used to remove volatile organic compounds (VOCs) from contaminated water. The process water enters at the top of the stripper and trickles down through various types of packing media. While the water is trickling down the media, air is forced up the column, and the VOCs are stripped from the water. The standard T. M. Gates, inc. air stripper has a treatment capacity of 100 GPM and a VOC removal efficiency greater than 99%.

AIR STRIPPING

Bio-augmentation is a remediation technique that injects low volumes of air and nutrients into the soil to stimulate microbial decomposition of contaminants. Unlike air sparging, bio-augmentation injects only enough air to sustain aerobic biological growth. As a result, no air emissions are created, which eliminates air monitoring. T. M. Gates, Inc. has implemented bio-augmentation in conjunction with other technologies to achieve drastic decreases in soil and groundwater contamination.

BIO-AUGMENTATION

FIXED FILM BIO-REACTOR

Fixed-film bioreactors utilize microorganisms to remove a variety of contaminants from groundwater or wastewater. The sizing of bioreactors varies depending on the contaminant concentration and daily flow. Fixed-film bioreactors are easy to operate and maintain, and do not produce any air emissions. T. M. Gates, Inc. has installed several fixed-film bioreactors, that are used to treat contaminants ranging from petroleum hydrocarbons to sewage. All fixed-film bioreactors installed by T. M. Gates, Inc. are designed for year-round operation.

GRANULAR ACTIVATED CARBON (GAC)

Granular Activated Carbon (GAC) is an effective treatment alternative that can be used as a tertiary treatment (polishing unit) or used to treat low concentrations of vapor or liquid contaminants. T. M. Gates, Inc. has installed carbon vessels in pressurized and non pressurized systems ranging in size from 55 gallons to 2,000 gallons. T. M. Gates Inc. can design the carbon vessels, and control the influent waste stream so that the carbon vessels can be changed or recharged annually.

Soil Vapor Extraction (SVE) systems pull contaminated vapor from the soil and can significantly accelerate the remediation of the soil and/or groundwater. Depending upon site specific soil conditions, SVE collection wells can be installed horizontally or vertically, and if necessary a state-of -the-art air permeate layer can be incorporated into a SVE system to increase the effectiveness of the wells. T. M. Gates, Inc. SVE systems are usually installed in conjunction with other technologies (i.e. pump and treat where shallow water table exist) to accelerate site remediation.

SOIL VAPOR EXTRACTION (SVE)

The ultraviolet, hydrogen peroxide reactor (UV reactor) is a relatively new technology that is used to treat contaminated liquid. The UV reactor does not emit air emissions and does not require disposal of waste. UV reactors have historically been expensive to install and operate. However, due to an increase in competition and improvements in technology, the capital cost of the UV reactors has decreased. T. M. Gates, Inc. has installed UV reactors in states that do not allow contaminants to be transferred from one media to another (groundwater to air, soil to air, etc.).

ULTRAVIOLET-HYDROGEN PEROXIDE REACTOR