Ash Pile Sampling and Remediation, Los Alamos National Laboratory

Detailed coordination efforts allowed Gilbane to safely remove Low Level Radiological Waste (LLRW) and hazardous waste in an ash pile on a steep slope at LANL. Activities included sampling, characterization and waste characterization of LLRW and hazardous waste.

Early decisions critical in center that offers one-stop care

At Los Alamos Airport, Gilbane managed the removal of a large ash pile containing low-level radioactive materials, PCBs, PAHs, lead, metals, asbestos, dioxins, and pesticides near LANL. The ash pile, which was associated with a DOE/LANL incinerator that operated from the 1940s to the 1970s, covered a 30,000-square-foot area and was up to 10 feet thick. The site of the ash pile was scheduled for cleanup and closure as part of the DOE Land Transfer Project to Los Alamos County.

This project was unique because the ash pile was located on a steep hillside, which required Gilbane to perform sampling and removal activities on 70-degree slopes. Gilbane personnel experienced in rappelling performed the sampling, so they could safely reach the ash and obtain samples. Forward planning and focused safety operations were critical to the success of the project. Gilbane removed approximately 320 cubic yards of uncontaminated debris and 3,500 cubic yards of ash with metallic debris and impacted soil from the steep hillside using an innovative combination of specialized logging equipment and vacuum systems, as well as mechanical excavation and handpicking of the debris.

Technical Area TA-21 Tritium Research Cluster, Los Alamos National Laboratory

Coordinated efforts in a Department Of Energy site allowed multiple tasks to be completed concurrently.

Decommissioning and Demolition of multiple structures

Gilbane performed decommissioning and demolition (D&D) of multiple structures, systems, slabs and below grade structural features, as well as removal of radioactive and/or hazardous materials (above and below grade) and remediation of underlying soils.

Notification of State of New Mexico, and Secondary Utility Disconnect Verification and Air Gapping was also performed by Gilbane. Readiness Review with a Gilbane-supplied Management Self-Assessment was successfully completed, as well as support closeout of pre- and post-start findings. D&D of TA-21-209 included all the roof, exterior walls, and interior columns; however, the end result/condition required the basement floor and the basement walls up to 3-feet below grade to remain in-place.

Radiological scoping surveys were performed and developed into characterization surveys which were used to decontaminate internal surfaces. Final surveys were performed and reviewed by DOE (who self-regulates similar to NRC) allowing clean demolition and recycle of the building structure. Abatement of HazMat (PCB transformers, asbestos, etc.) was also performed prior to demolition. Gilbane acquired and closed out New Mexico permits for Storm Water Pollution Prevention Plan (SWPPP).

Gilbane performed a final status survey in accordance with the MARSSIM requirements. The results of this survey were documented in a Final Survey Report and approved by LANL prior to demolition.

Blue Ledge Mine Superfund Site Remedial Investigation/Feasibility Study (RI/FS)

Gilbane performs the remedial investigation of an abandoned mine under the CERCLA.

Gilbane is conducting the remedial investigation at the Blue Ledge Mine Superfund Site.  Investigation activities began with planning, procurement, and coordination of site characterization, technology testing, and risk assessment activities.  Gilbane collected water, soil and biota samples, acquired analytical services and monitoring systems, installed, operated and maintained water and air monitoring systems, and evaluated and compiled the analytical and monitoring data into a project database to facilitate these activities.  The data was used to select potential chemical and bio remedial technologies that were tested at the bench and on-site pilot-scale to screen remedial technologies and assess risks and hazards presented by the abandoned mine and remnant wastes.

Cooper Drum Company Remedial Action Oversight

Gilbane provides oversight to the U.S. Environmental Protection Agency (EPA) for all contractor related activities at the Cooper Drum Company Superfund Site.

Gilbane has conducted site investigations and a feasibility study to address contamination in soil and groundwater at the site prior to initiation of cleanup activities by the potentially responsible parties (PRPs).  For EPA, Gilbane provided technical oversight of the PRP’s construction, implementation and operation of a dual-phase soil gas/groundwater treatment plant, including collection of confirmatory split-samples.  Gilbane currently conducts technical oversight and evaluation of the PRP’s efforts to remediate the groundwater contaminant plume, and conduct treatment plant system diagnostic testing and performance monitoring.

Fresno Municipal Sanitary Landfill Superfund Site

Gilbane currently provides oversight to U.S. EPA for all contractor related activities at the Fresno Municipal Sanitary Landfill.

Gilbane provides technical oversight for the construction, implementation and operation of the groundwater treatment plant, landfill gas destruction flare and landfill maintenance.  In an oversight capacity for the EPA, Gilbane conducts inspections of site activities and reviews technical documents generated by contractors working on behalf of the facility’s potential responsible party (PRP).  Oversight also includes technical evaluation of the remediation of the groundwater contaminant plume, treatment plant system diagnostic testing and performance monitoring.

Environmental Engineering & Remediation Services for NAVFAC SouthWest Div. at Hunters Point Shipyard, CA

Gilbane plays a significant role in supporting NAVFAC in environmental task orders.

At Hunters Point Shipyard, a former Navy base in San Francisco, CA, Gilbane has completed multiple environmental projects involving data gap investigations, planning, remediation, and reporting for multiple contaminants of concern to transfer the property for public use. Gilbane managed soil, groundwater and sediment contamination that included volatile organics, TPH, metals, PCB and radiological contaminants.  Gilbane also managed transportation and disposal of over 350,000 tons of contaminated waste to offsite landfills.  Gilbane received commendations from the Navy and Hunters Point Community for our outstanding community outreach work.

Gilbane conducted Remedial Action activities under CERCLA, RCRA, UST, and other programs including Work Plans, Site Safety & Health Plans (SSHPs), Removal Action Completion Reports (RACRs) and other project documents that underwent Navy, regulatory agency and local city/county reviews. We interfaced with regulators, Navy officials and public stakeholders to address concerns for environmental impacts. Some task orders required the transfer of contaminated land under rigorous scrutiny. Gilbane played a significant role in supporting the Navy’s outreach during these task orders, developing press releases, quarterly reports, and fact sheets summarizing critical activities.

Jervis B. Webb Company Superfund Site

Gilbane is currently investigating environmental cleanup strategies for soil, soil gas and groundwater contamination at two former industrial sites.

Gilbane is currently evaluating and collecting site data and will select a soil and groundwater remedy that eliminates, reduces, or controls risks to human health and the environment.

Site activities include sampling and laboratory analyses to evaluate the extent of soil, soil gas and groundwater contamination on-site as well as the levels of contamination in the residential and industrial neighborhood adjacent to the Site.  The results of soil gas sampling will be used to evaluate any immediate human health impacts from vapor intrusion for on-site workers and residents.

In addition, groundwater data will be used to evaluate any connection between site groundwater contamination that has migrated down gradient and may be commingling with other groundwater contaminant plumes.

Clean, Inspect, Repair Tanks | Kunsan, Suwon, and K-16 Air Bases

Gilbane identified deficiencies and recommended additional repairs in the tank inspection reports.

Gilbane cleaned, inspected and repaired 13 storage tanks at three US Air Bases in Korea: Kunsan, Suwon, and K-16. The various-sized tanks included cut-and-cover, aboveground storage tanks (ASTs), and underground storage tanks.

The tank inspections, which were executed per API 653 and API 650 standards, identified numerous mechanical repairs and necessary upgrades needed to return each tank to compliance. Gilbane also performed tank tightness testing.

Overall mechanical repairs and necessary upgrades included repairs to patch plates, valves, piping, and containment; lead-based paint (LBP) abatement; stilling well installation; seal welding and pitting repairs; and vacuum vent and manual gauge hatch repairs. Gilbane inspected all welds via magnetic particle or dye penetrant testing. Gilbane also resealed/recoated deteriorated metal components including vents, access hatches, piping, electrical components, pits and tank interiors.

After repairing each tank, Gilbane calibrated the tank and had a licensed tank inspector certify all repairs were completed per applicable codes and API standards.

Fuel Pier Cathodic Protection Inspection and Upgrade

Gilbane completes D-B repairs to base-wide cathodic protection system in Portugal.

Gilbane completed mission critical JP-8 jet fueling system repairs at an operational airfield at Lajes Field, which is located in the Azores. Lajes is a Portuguese archipelago in the Atlantic Ocean that is subject to erratic weather, including heavy rain, sleet and winds. Because the project site was on an active runway, the team had coordination with the airfield tower. Also, all equipment and materials had to be imported by sea from the U.S. and Europe.

Design-build repairs to the base-wide cathodic protection (CP) system included new rectifiers, CP test stations, and new anodes on underground fuel pipelines. While validating the conceptual design, many existing CP system components were discovered to be non-functional or non-reliable. Also, the CP system at the South Pier Tank Farm needed repair. Gilbane performed these repairs and evaluated mechanical deficiencies and identified required repairs at the tank farm and pier.

Gilbane excavated and constructed an underground, cast-in-place concrete vault east of the existing south tank farm entry guard house to contain the flange joints on the underground fuel lines and enable future inspections. Gilbane also wired cabling to the flange joints on the fuel lines to provide better monitoring of CP performance. The team performed design-build replacement of a fuels receipt piping system manifold for unloading fuel tankers; inspected welding and pipe coatings; and performed start-up and testing.

Working with the Marine Corps Base Hawaii (MCBH)

Gilbane is enhancing Hawaii’s sustainability initiatives.

Under a $3 million project to Clean, Inspect, and Repair Tanks, Gilbane is providing fuel system maintenance services for 10 aboveground storage tanks. Work includes interior tank cleaning, API 653 inspection of out-of-service tanks, STI inspections, gauge tube installation and implementation of repairs associated with the inspections.

Gilbane also completed execution for the state of Hawaii’s first, fully operational, E85 fueling system. The Marine Corps Base Hawaii commenced the 10,000-gallon, E85 storage tank and dispensing fuel system with a ribbon cutting ceremony, establishing the Military Base as a “green” benchmark for sustainable and environmental initiatives.

Gilbane provided all execution to launch this sustainable energy resource as an economical alternative to fossil fuels in support of the US Marine Corp’s -mandated gasoline reduction goals. Our team installed all electrical, communications, and plumbing connections associated with the E85 systems installation, and performed all cleaning, inspection, testing and commissioning of the new tank.