Case Study #16 – Longview, WA Scope of Work CalClean was contracted for 5 months to utilize their mobile high vacuum dual phase extraction to aid in the recovery of free product for a confidential client within Southwest Washington. The subject property exhibited free diesel product in the subsurface soil and groundwater throughout the entire site. Greater than two feet of diesel product was observed in several wells located on the down gradient edge of the subject property. To enhance product recovery 64,000 gallons of a surfactant, salt and water mixture was introduced to the subsurface in an attempt to further wash the soils of NAPL. Lithology The site is underlain by alluvial materials consisting of silt with inter-bedded fine sand to 6 feet below ground surface

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