Dean Ryan has been tasked to remediate petroleum-contaminated soil and groundwater at the MCAS Tustin, at the location of a former fuel farm, following the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) removal action. The Department of Defense (U.S. Navy) was the authority, which undertook the CERCLA Response Action in accordance with 42. U.S.C., Section 9604, 10 U.S.C. Section 2707 and Federal Executive Order 12530.
The MCAS Tustin is located in central Orange County, California, approximately 40 miles southeast of the City of Los Angeles.
Dean Ryan, as a key subcontractor to OHM, has supplied on-going technical support for Delivery Order 12 (DO 12) involving the remediation of petroleum contaminated soil and groundwater at a former fuel farm. Thirty-eight (38) underground storage tanks were removed from the site under the CLEAN I contract. Remediation activities include, preparation of work plans, additional site assessment, abandonment of 20 existing groundwater monitoring wells, mobilization and set up of a low thermal desorption unit, mobilization and set up of a granular activated carbon water treatment unit, excavation and treatment of soil, de-watering and treatment of groundwater, confirmation testing, backfilling, and site restoration.
As of April 1, 1997, approximately 75,000 tons of soil has been excavated from the site and more than 3 million gallons of groundwater have been treated and certified clean. Begun in October 1994, this project is currently ahead of schedule and under budget. This is noteworthy because the full scope of work was not known at the time of the original estimate. One specific out of scope incident occurred as a result of an unexpected release at the site. The field crew mobilized ahead of schedule to perform an emergency response with no impact to cost or schedule on the project. In another instance, the team permitted and mobilized the thermal desorption unit ahead of schedule to meet new deadlines.
Dean Ryan's innovative project management skills and approach has saved the Navy time and money in the execution of Delivery Order 12, (DO12). We have saved the Navy time and money on other DOs and Clean II CTOs as well. Our thermal desorption unit mobilized under DO 12 is also being used to treat soil from other petroleum contaminated sites under DOs 31, 51, 20, and 69. Similarly, our water treatment unit, mobilized under DO 12, is also treating water at other DOs. Additional man-hours and time have been saved by using our existing work plan developed under DO 12 for DOs 31, 51, and 69. Additionally, 90% of the treated groundwater, that was certified clean, was used for dust control and compaction. Because our cost and time conscious actions have saved the Navy thousands of dollars, we have been named an OUTSTANDING CONTRACTOR
While our technical approach and cost and schedule concerns have been instrumental to the success of this project, our relationships with the base and surrounding and community and regulatory agencies are equally important. Our team has continuously supported the base public relations department by preparing RAB presentations, conducting tours of the site for local television personalities, a major newspaper, as well as concerned local residents. We have also held a town hall meeting with residents of the base. Critical to maintaining project cost and schedule was the excellent relationship developed and maintained with the RWQCB staff. These relationships have resulted in the timely approval of confirmation sampling and avoided delays in the excavation and backfill activities.