June 28, 2004

Sonic Environmental passes BC tests for PCB technology approval

Sonic Environmental last week reported that all tests conducted as part of the regulatory approval process for the BC Ministry of Water, Land and Air Protection (WLAP) were successful in cleaning polychlorinated biphenyl (PCB)-contaminated soil samples to residual levels of less than two parts per million (< ppm). The company says the results will be incorporated into a formal report to assist Ministry staff in the consideration of Sonic's application for commercial deployment of its proprietary PCB destruction process.

Four tests of Sonic's patented Platform Technology technology were independently witnessed by URS Corp consultants and staff from the Greater Vancouver Regional District (GVRD). These tests were conducted on four soil samples from a PCB-contaminated site in British Columbia; each sample had initial PCB levels higher than 400 ppm. Sonic's proprietary PCB destruction process succeeded in reducing the PCB levels to less than 2 ppm without the use of high temperature incineration. The efficacy and environmental performance of the process was confirmed by analysis of the PCB levels in the soil samples before and after treatment.

The first test was conducted as a scoping test to allow Sonic to determine a test methodology for the analysis of any potential air emissions from our process. An air emission permit from the GVRD required the company to measure and report air emissions so as to confirm the anticipated low levels of emission from the Sonic process. Results from the scoping test confirmed acceptable air emissions in an abbreviated analysis. Air emissions from subsequent testing will be independently analyzed in more detail and reported to the GVRD and the Ministry.

Sonic will also test and report on process water and solvent used in the tests in order to confirm final design criteria for treatment and disposal of the materials, which were re-circulated and re-used in all four tests. Initial results show that all used solvent had PCB levels below the analytical detection limit of 2 ppm.

Sonic president and CEO Adam Sumel said the results should be ready to report to the Ministry within a month. "Now that we have completed these regulatory tests we can concentrate on process and design optimization of Plant Two, which will be deployed commercially later in the year," he said, adding that "although Sonic has met many significant milestones in the last three years, this is the independent validation that many potential clients and investors have been anticipating."

More information is available from Adam Sumel, E-mail asumel@sesi.ca, or on the company's Web site, www.sonicenvironmental.com.

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