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Direct Push Technology (DPT) Most in the environmental field are familiar with Direct Push Technology (geoprobe, strata probe, earth probe, etc.). APEX uses a percussion hammer to drive a split spoon sampler and extending drive rods into the earth as opposed to drilling a large diameter borehole using augers. This technique allows APEX to collect discreet soil and groundwater samples while producing one-tenth the oils cuttings of other drilling methods. In 1995, APEX purchased our first DPT unit and added a second in 1996. Since then, we have continued to update and improve on available technology, yielding the most powerful DPT unit available. In addition to sampling, DPT is the most effective method available for installing soil gas monitoring probes, and smaller diameter water monitoring points. Our DPT units are currently mounted onto one of our full sized Mobile B-61 HDX drill rigs and onto our Limited Access Rig. We are today’s leader in DPT/Probing and will continue to improve and test new tools and applications to better meet our clients needs. Air Sparge Point For those jobs that require a high rate of flow, APEX recommends a highly advanced KVA sparge point. APEX, in conjunction with a few select clients, has been testing this product over the past six months. These sparge points create micron bubbles, sized to penetrate through sandy soils without fracturing or creating "preferential pathways" which rob surrounding soils of gas transfer. The outside diameter of these sparge points range from 0.5 inches to 2.1 inches. Lengths range from 18 inches to 10 feet. For more information concerning these sparge points or their installation methods, call David Aronne, President of APEX Environmental Services. Soil Gas Monitoring Probes In addition to soil and groundwater sampling, our DPT system can install soil gas vapor monitoring implants. Vapor monitoring implants are precisely placed at the depth required and have proven to be a convenient and accurate method of measuring soil gas concentrations over time. APEX is currently seeking California Water Board approval as a soil gas monitoring probe installation contractor. Pressurized Abandonmets Over the past several years, the environmental industry has recognized pressure grouting as an option for well destruction projects. When approved, pressure grouting is the preferred method over drilling out the well casing and materials because it is less expensive, quicker, and cleaner. With pressure grouting, the well casing is sealed using a pressure packer that injects a thick slurry of bentonite grout, at a rate of 300 psi, permeating the well screen and surrounding area. After the wells annular space is completely sealed, the uppermost five feet of casing is removed and backfilled with concrete. This method is also readily adaptable and extremely effective at abandoning horizontal lines, such as product and vent lines. |
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APEX
Environmental, Inc. |