Environmental Engineering and Remediation
Site Inspections and Investigations

Hazardous Waste Stream Analysis and Bunker Closure

Marine Corps Air Station (MCAS) Yuma, AZ

GCE provided the services necessary for the annual sampling and analysis of 127 different waste streams generated during routine operations at over 40 operational units at MCAS Yuma. Additionally, GCE conducted an investigation of the 180-day waste accumulation area at the Cannon Air Defense Complex (CADC) and of eight former munitions bunkers. The objectives were to evaluate any residual contamination associated with military munitions and materials potentially stored at the waste accumulation area.

  • Hazardous Waste Stream Analysis. GCE successfully supported MCAS Yuma Resource Conservation and Recovery Act (RCRA) compliance for a period of five years under this contract. Hazardous Waste Stream Sampling and Analysis is performed to determine whether hazardous wastes being considered for disposal at MCAS Yuma are within the scope of the RCRA waste disposal requirements. As part of this project, GCE prepared the project specific planning documents, including the Sampling and Analysis Plan (SAP) and Work Plan in accordance with the Uniform Federal Police for Quality Assurance Project Plans (UFP QAPP), and the project Health and Safety Plan. GCE worked closely with MCAS Yuma to determine the mission and activities of each unit and developed an understanding of the potential waste streams that may be encountered during the sampling phase. GCE developed specific Standard Operating Procedures for the complex sampling associated with the wide variety of waste streams. On an annual basis, GCE performed the sampling and analysis of 127 samples from 20 different waste streams including: alodine waste, granular activated carbon waste, oil water separator waste, paint chip waste, pesticides waste, petroleum, oil, and lubricants (POL) waste, power washer sludge waste, silver recovery, solvent waste, tire wash waste, wash rack filter waste, paint waste, film fixer developer unit waste, waste from broken lamps, waste water treatment sludge, bead blast waste, bead blast filter waste, paint booth filter waste, stripper rinse waste, and bio-cell (soil sample) waste. Upon receipt of analytical results, GCE conducted a usability assessment of all data, which facilitated the preparation of the final Hazardous Waste Stream Sampling and Analysis Report. This report was relied upon by unit leaders daily to ensure RCRA compliance.
  • Munitions Bunker and 180-day Accumulation Area Closure. When MCAS Yuma was in the planning phase of the new Joint Strike Fighter hangars, GCE was called upon to assist with the investigation and closure of several munitions bunkers that were located within the planned expansion area. GCE was tasked with the investigation for the potential presence of hazardous waste at eight historic munitions bunkers at MCAS Yuma and one 180-day containment area at CADC. The primary objective of this portion of the project was to demonstrate that hazardous residues associated with military munitions and waste storage were not present in the soil beneath and/or surrounding the bunkers at concentrations which posed a risk to human health. Due to uncertainty regarding the types of munitions/materials stored in the bunkers, as well as unknown munitions handling practices, GCE performed a complete a comprehensive assessment of the munition structures and surrounding soil.

The investigation consisted of development of a SAP to ensure statistically representative sampling of the dust and sediments inside the structures, as well as all soils that could have been impacted by drainage from the structures or materials stored outside the bunkers. Ultimately, 65 discrete soil samples were collected and analyzed for constituents found in munitions historically handled at MCAS and at the 180-day waste accumulation area.

All sample concentrations were below the Arizona residential Soil Remediation Levels (rSRLs) demonstrating that hazardous residues were not present at the site. A closure plan was prepared and submitted to the Arizona Department of Environmental Quality (ADEQ) for the eight munitions bunkers and the 180-day accumulation area. ADEQ concurred that there was no risk to human health and approved the clean closure plan. The munitions bunkers were demolished to allow for the construction of the Joint Strike Fighter hangars at MCAS Yuma.