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Paper Mill Site Remediation
Remediation of a former paper mill in the State of Washington contained multiple water treatment requirements. The structures had been demolished, but the ground still contained hydrocarbons and Hydrogen Sulfide contamination. The Remedial Action Plan called for the contaminated soil to be excavated and hauled offsite. In order to accomplish this, the water table had to be lowered to below the deepest level of contamination. Pump test showed the projected flow to be less than 150 gpm.
Clear Creek Systems, Inc provided the client with a complete water handling and treatment system for the project. A vacuum pump drew water from the dewatering well points into an OWS 200 Oil/Water Separator. The water was then pumped from the OWS 200 into two weir tanks placed in series. From there the water was pumped through a 24-3 sand filter, a PF 400 sediment filter, and six CM 72 Granular Activated Carbon vessels.
The OWS 200 separated free oils and fuels from the water. The weir tanks settled the heavy solids. The sand filter removed the medium sized sediments. The PF 400 removed the fine sediments. The six CM 72 removed the hydrocarbons from the water. The client also rented a 1.8-gallon per hour capacity metering pump to inject hydrogen peroxide to remove the sulfides prior to the weir tanks. Each piece of equipment served to remove a specific range of contaminants. This greatly enhanced the system's efficiency.
The project proved to be a complete success with all regulatory agencies satisfied with the treatment results.
