GEMS Services


  • Tenant improvements
  • Ground-up new construction
  • Concrete, flatwork, sidewalks, block walls, retaining walls
  • Painting—commercial, industrial, and residential
  • Mechanical, piping underground and aboveground

Environmental Contracting

  • Hazardous waste management
  • Drum management, LTL
  • Transportation and disposal
  • Contaminated soil and water disposal

Contaminated Site Clean-Up

  • Demolition and deconstruction
  • Soil and groundwater remediation
  • Structure and building decontamination
  • Tanks, sumps, oily water separators
  • Digesters, clarifiers, ponds, surface impoundments

Underground Storage Tanks

  • UST removal, installation, and upgrade
  • Enhanced vapor recovery
  • Designated operator
  • Compliance testing, maintenance, and repair

Aboveground Storage Tanks

  • AST installation and upgrade
  • Compliance testing, maintenance, and repair

Featured Projects

NASA Fuel Farm

Installation and startup of aboveground fueling system for NASA Stratospheric Observatory for Infrared Astronomy (SOFIA) aircraft at the Armstrong Flight Research Center, Palmdale, CA.

GSA Frank Hagel Federal Building

Installation of new bullet proof guard booth/mantrap and replacement of motorized steel gates with new anti-ram, crash rated gates at the Frank Hagel Federal Building, Richmond, CA.