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Former Oil Field Assessment, Remediation and Construction Monitoring

Rincon Consultants was contracted to provide environmental support during grading/construction of a commercial development in Santa Barbara County, California. The property was formerly used as a producing oilfield and included onsite refining. Rincon completed soil and soil-gas sampling assessments to define the extent of onsite contamination. Areas of high subsurface methane were identified. During grading in these areas, Rincon personnel provided onsite health and safety monitoring. The soil-gas data was used by the client’s engineer to design methane barriers and venting systems within the foundations of buildings. Approximately 4,000 cubic yards of petroleum-contaminated soil was excavated and stockpiled onsite. Rincon designed and permitted a bioremediation treatment system with Santa Barbara County. All of the soil was treated to County specification within a three-month period. The treated soil was re-used onsite in routine grading operations.

Vapor Extraction Remediation for Chlorinated Solvents, SCAQMD and WIP Permitting, Manufacturing Plant

Rincon Consultants installed and operated a soil vapor extraction remediation system to remove chlorinated solvents (PCE, TCE, 1,2-DCE) from subsurface alluvium. The solvent release impacted soil below a cooling water blow-down pit. The remediation equipment consisted of a trailer mounted carbon adsorption unit capable of producing a flow rate of 200 SCFM. System performance was above specifications and the operational efficiency averaged over 90%. The treatment system was permitted through the South Coast Air Quality Management District (SCAQMD) and the Regional Water Quality Control Board (RWQCB), Well Investigation Program. Following the soil vapor extraction equipment operation, Rincon was able to demonstrate to the RWQCB that the cleanup had been effectively completed. Environmental site closure was granted by the RWQCB.

Phase I Assessment, San Fernando Valley Redevelopment Area

Rincon Consultants completed a Phase I assessment for a several hundred-acre redevelopment area of the San Fernando Valley, California. Part of the redevelopment project was to determine environmental conditions within the area. The Project Area has been developed with commercial, industrial, and residential uses from as early as 1920. Historically, the area had been open land or developed with agricultural and residential land uses, but was developed with commercial and industrial land uses as early as 1940. Our Phase I assessment included a site reconnaissance, a review of historical aerial photographs and maps, an analysis of an environmental database of potential and known release sites, and the preparation of an assessment report.