Remediation Design and Soil Remediation, Long Beach, CA

The Port of Long Beach acquired a 160-acre former oil field and intended to develop the property into a marine terminal. Accord Engineering played a critical role throughout the entire design and construction phases of the contract. Our engineers provided design, consulting, and management services to assist with the project needs in terms of design, permitting, implementation, and documentation from 1998 to 2003. Work performed included the following:

- Engineering design and treatability studies
- Bid documentation and assistance
- Permitting and agency interaction
- Value engineering
- Project management
- Documentation and closure

A total of 260,000 cubic yards of oily waste was excavated from 32 sumps, subsequently stabilized, and placed onsite. A total of 5 million tons of fill was imported to raise the site 25 feet higher. During the 705-days of field work, the project team was able to maintain a perfect construction record with no OSHA-recordable accidents or citations for permit violations. A value engineering study was conducted and resulted in the savings of $1.5M by avoiding double-handling of the excavated material.

Due to the historical use of the site as an oil field, Accord Engineering conducted a soil gas survey at the site after the remediation and site restoration. The investigation results indicated the presence of methane gas in shallow subsurfaces. A passive methane gas barrier system was designed and constructed as a result of our findings.