Marine Corps Air Station (MCAS) Yuma, AZ
GCE provided the engineering, planning, topographic survey, design support, and contract administration on this design-build project. The project included the characterization and remediation of JP-8 fuel contamination resulting from a large above ground storage tank (AST) release. Within four months, GCE's environmental engineering division designed, installed, and operated the Soil Vapor Extraction (SVE) system on site.
GCE provided the topographic survey of the site, civil engineering, and construction oversight for this project. With this information the site plan was developed for MCAS approval. The site plan included a concrete pad, piping plan, fencing, access gates, electrical layout, and the SVE system for removal of JP-8 fuel from the subsurface soil.
GCE prepared project work plans, including a Sampling and Analysis Plan (SAP), Quality Assurance Project Plan (QAPP), and Site Health and Safety Plan (SHSP), ahead of the project schedule. GCE completed the trenching installation of pipe, concrete pad, access gates, electrical, and SVE system installation, and supervised the construction of all elements of the project and provided as-built drawings to MCAS Yuma.
Due to an adjacent free product plume, GCE designed and installed a series of passive inlet wells to create an air barrier between the site and the adjacent free product plume. This innovative approach to this subsurface condition prevented co-mingling of the contaminant plumes. GCE operated and maintained the SVE system for a period of 18 months. GCE completed remediation verification sampling and determined that soil contaminant concentrations were below action levels and obtained site closure.