Passive Pre-Treatment with ChitoVan Cartridges Followed by CESF with 1 % ChitoVan

Cleanup of a former railway fuel and maintenance facility in Skykomish, WA is currently underway. Nearby environmentally sensitive waterways have increased the need for responsible management of contaminated waters.

Two Chitosan-Enhanced Sand Filtration systems have been implemented by Clear Water Compliance Services, LLC to treat stormwater runoff, dewatering water, in river work and wetland work. The treatment system maintains compliance through the use of ChitoVan Chitosan Lactate Cartridges for pretreatment followed by sand filtration with 1 % ChitoVan Chitosan Acetate. Carbon media is also used for enhanced hydrocarbons removal. The treatment system continually meets discharge standards for turbidity, arsenic, lead, BTEX, dissolved oxygen and PAH. Over 16 million gallons of clean water have been discharged from May, 2009 through September, 2010.