Vehicle Wash Wastewater Filtration

Introduction - Initial laboratory studies show X-TEX-B12  sorbent to be very efficient in selectively adsorbing / absorbing petroleum and vegetable-derived hydrocarbons from water. This work was done using laboratory prepared and controlled test solutions. This test demonstrates X-TEX’s sorbent effectiveness by testing real-world samples. Real-world samples measure not only the ability of the filter material to remove the pollutants of interest, but also to handle water that contains floating and dissolved hydrocarbons, emulsifiers and detergents, as well as debris that might affect filter performance.

Method - The environmental manager of a local lumber mill provided a five gallon sample of effluent from a logging truck wash station. The sample was thoroughly mixed and split into two sub-samples. One sub-sample was tested to determine suspected organic and inorganic pollutants. The other sub-sample was passed through a filter system using X-TEX filter media and the filtered water was analyzed for the same pollutants. The analyses were performed by a fully accredited environmental laboratory using current U.S. EPA methods recommended for determining these compounds.

Results- Vehicle Wash Effluent – Unfiltered / Filtered

Client ID Method # Parameter Result for Unfiltered Result  X-TEX Filtered Detection Limit Units
Effluent 1/22/01 EPA 1664  Oil & Grease >1000  ppm 
Effluent 1/22/01 EPA 160.2 Total Suspended Solids 230 10 5 ppm
Effluent 1/22/01 NWTPHDX #2 Diesel Fuel  910 3.4  0.2  ppm
Effluent 1/22/01 NWTPHDX Motor Oil  15000  3 0.4 ppm

Effluent 1/22/01

EPA 6020 Arsenic  ND* ND* 0.006  ppm
Effluent 1/22/01 EPA 6020 Cadmium 0.0018  ND* 0.0005 ppm
Effluent 1/22/01 EPA 6020 Chromium  0.013 0.0044 0.001 ppm
Effluent 1/22/01 EPA 6010 Copper  0.077 ND* 0.01 ppm
Effluent 1/22/01 EPA 6010 Lead  0.011 ND* 0.01  ppm
Effluent 1/22/01 EPA 6020 Nickel  0.0032  0.0082 0.001 ppm
Effluent 1/22/01 EPA 6010 Zinc  2.1 0.85 0.01 ppm

*ND – not detected at or above the method detection limit

Conclusions - As can be seen in the table above,  X-TEX sorbent was highly effective in removing organic pollutants and suspended solids from the sample. Especially notable is the reduction in oil and grease, diesel and motor oil between the filtered and unfiltered samples.


The Xextex Corporation, USA

Jerry M. Brownstein
President & CEO
1420 NW Gilman Blvd. #2227
Issaquah, WA 98027

Phone: (425) 392.3848
Fax: (425) 392.0222


90 SEC

X-TEX Outperforms Polypropylene



*X-TEX does not produce
potable water.

10.5 MIN