Pollution Engineering - April 2009 - (Page 27) Remediation GOES FOR 3 The chart to the left is of readings from the four monitoring wells in the source area. The readings showed an initial spike in headspace PID measurements related to desorption of VOCs from the aquifer matrix, followed by subsequent destruction to non-detectable levels during the treatment. Permanganate exhibits characteristics that make it an excellent choice to follow a CHP treatment for PCE remediation. Permanganate is generally a less aggressive oxidant than CHP and not as efficient as CHP at rapidly destroying sorbed- or NAPLphase contaminants. Permanganate is also a more costly oxidant than CHP in terms of cost per unit mass of contaminant destroyed. However, due to the slower reaction, permanganate has a much longer lifetime in the subsurface than CHP. Residual permanganate may last for months to address contaminants slowly diffusing from fine-grained matrices. Permanganate also diffuses directly into finer-grained aquifer matrices to directly attack those contaminants. Executing the play The design called for 72 injection wells installed across three depth intervals between approximately 10 to 40 feet below grade, in Figure 3 shows a floor drain system that was unearthed during excavation of 94 tons of soil. This was considered the source of the contamination. Cloud Chamber Scrubber ® Best Technology Available for Submicron Particulate Tri-NOx® Multi-Chem® System • Wet destruct technology simultaneously removes SO2 and other acid gases. Takes Any NOx Load to ZERO ppm! ESP E-mail: kevin.moss@tri-mer.com • CCS treats PM1.0 submicron particulate, plus PM2.5, PM10 and condensables. • Simultaneously treats all soluble gases, including SO2, HCl, H2S, and ammonia compounds. • Low total energy use, less than 1.5 inches pressure drop. • Optional integrated SCR for NOx removal. • Large scale diesel, glass production, syn-gas cleaning, solid fuel combustion, many more uses. ® • Non-catalytic system will not blind or poison. • System is free of toxic/ harmful by-products. E-mail: dhaley@tri-mer.com • Systems operating in tough California southcoast region. ® CORPORATION Tri-Mer ph (989) 723-7838 • salesdpt@tri-mer.com Since 1960 © 2009 Tri-Mer Corp. www.tri-mer.com APRIL2009 www.pollutionengineering.com 27 http://www.pollutionengineering.com
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