Case Study #18 – Los Angeles, CA (Oil Field Cleanup) Scope of Work CalClean was contracted for 2 years to utilize two mobile high vacuum dual phase extraction systems to aid in the recovery of free product for a confidential client. The subject property had fifteen deep oil wells (around 6,000-7,000' deep) that were capped. However, the shallower soils (to 45') exhibited free oil product (from oil well drilling operations) in the subsurface soil and groundwater throughout the entire site. Greater than nine feet of heavy oil free product was observed in several wells located on the subject property. Lithology The site is underlain by alluvial materials consisting of silt with inter-bedded fine sand to 20 feet below ground surface (bgs) and medium to fine silty sand 45 feet bgs.

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