Energetic • Responsive • Experienced

Architect-Engineering

Groundwater (GW) Investigation, Marine Corps Air Station Yuma, AZ.

TREVET completed a post-Record of Decision GW investigation of the emergent chemical 1,4-dioxane, detected in effluent from an existing VOC treatment system. Subsurface lithologic and other data was compiled; GW monitoring wells were designed and installed; chemical and geotechnical testing were performed; GW flow and transport modeling was conducted; and negotiations with regulatory agencies were conducted. The modeling results in the final report indicated that 1,4-dioxane may be migrating offsite in the shallow, intermediate, and deep water-bearing zones. The final report recommended that the current treatment system be optimized by adding extraction wells at specific locations and adjusting carbon and extraction water residence times to more effectively treat 1,4-dioxane.

“Based on quality, schedule, cost control, management, and understanding of regulatory requirements, this contractor is exceptional.”