Our Clients

While clients may initially find themselves drawn to ERRG for our broad range of capabilities, they continue to rely on us for our responsiveness, resourcefulness and proven commitment to client service.

“ERRG did an outstanding job on this project.  The project manager was very responsive, creative and worked tirelessly to complete all aspects of the project with professionalism and a positive attitude.  [ERRG] had a very can-do attitude towards solving problems and overcoming issues over the duration of the project.  ERRG worked very well with other contractors on the shipyard and proactively coordinated all aspects of the field effort.  ERRG personnel were very qualified and familiar with all requirements of construction projects, including EM-385, storm water, and dust control requirements.  I would highly recommend ERRG.  ERRG’s outstanding performance on this project was the basis of the Navy’s recommendation for recognition and selection as SBA Region 9’s 2011 Prime Contractor of the Year.

Lara Urizar, U.S. Navy — Remedial Action at Installation Restoration Sites 7 and 18, Parcel B, Hunters Point Naval Shipyard, San Francisco, California

“I would like to take this opportunity to recognize ERRG for outstanding work performed on multiple projects conducted under the Formerly Used Defense Sites Military Munitions Response Program. The ERRG team has demonstrated professionalism, diligence, and dedication in addressing complex issues related to World War II munitions found throughout the State of Hawaii.”

Steven Mow, Hawaii State Department of Health — Remedial Action, Maui Bombing Targets, Kanahena Point Munitions Response Site, Maui, Hawaii

“Safety was always first. They completed the project way ahead of schedule, even with additional scope added. They stayed within budget and did it all safely, compliantly, and in a timely manner. They were awesome at communicating project status, scheduling, costs, any safety, waste, or environmental questions or concerns…They were a pleasure to work with and a model we wish all our subcontractors were like. They are an asset to any project you involve them in.”

Patrick Mahoney, Los Alamos National Laboratory — TA-46 Deactivation and Decommissioning, Los Alamos National Laboratory, Los Alamos, New Mexico

“The California Department of Toxic Substances Control (DTSC) would like to express their appreciation for all the hard work, dedication, communication and coordination from ERRG observed during the design and construction of the Argonaut Dam Retrofit in Jackson, California. Starting in 2015, with the design and construction of the Interim Action at Argonaut Dam through the end of construction in 2018 of the Retrofit of the Dam, ERRG has showed professionalism, knowledge and communication of the highest quality.”

Tami Trearse, Department of Toxic Substances Control — Argonaunt Mine Remediation, Dam Retrofit, and Stormwater Diversion System, Jackson, California

“Thanks to ERRG for the high quality, safe, and timely completion of the shoreline project. We appreciate it and all the planning to make it happen.”

Daniel McCormack, The Boeing Company — Boeing Plant 2 Shoreline Restoration, Lower Duwamish River, Seattle, Washington

“ERRG was exceptionally knowledgeable and effective working in Pacific Island environments, making efficient use of local subcontractors while maintaining a high level of work product quality, scientific and analytical rigor, and productivity.”

Michael Desilets, U.S. Army Corps of Engineers — Tank Removal and Petroleum Contamination Investigation, Former Naval Fuel Farm, Aua Village, American Samoa

“I cannot say thank you enough for the excellent job you did on this project!  It was such a pleasure to work with you.  Considering the time constraints we were under, you managed the project magnificently and got it done without any issues.  Again, thank you for your work and we look forward to working with you on future projects.”

Greg Buncab, Senior Environmental Health & Safety Specialist, East Bay Municipal Utility District — Sediment Removal Action, San Ramon Creek, Danville, California

“ERRG is a top notch contractor to work with and approach each projects as partners. I received glowing comments back from my engineers on this project as well on the superior quality of work.”

Jamie Wade, U.S. Forest Service — Cibola Uranium Mines Removal Action, Cibola National Forest, New Mexico

“As the Legacy Facility Program Manager at Lawrence Livermore National Laboratory, I’ve had the pleasure of working with ERRG over the past 4 years on a number of disposition projects. At all times I have found the ERRG staff to be very knowledgeable, professional, safe and responsive.  All project have been executed within agreed upon Schedule, Scope and Cost.  We have built a high level of trust with ERRG’s ability, looking forward to collaborating further with them on future projects.”

Mark Costella, Lawrence Livermore National Laboratory — Various Projects, Livermore, California

“This was a great job done by the team including ERRG as Prime. All performed very well and we appreciate the teamwork and the outstanding effort.”

Eric Green, U.S. Navy — Range Clearance Target Removal, Marine Corps Air Ground Combat Center Twentynine Palms, San Bernardino County, California

“ERRG is a great company to work with. The company is comprised of qualified professionals who are dedicated toward the safety of all personnel, and committed to delivering excellent services and products. The Golden Gate National Recreation Area awarded many tasks to ERRG based on the quality of their work.”

Tony DiStefano, Golden Gate National Recreation Area — Fuel Line Removal Action, Point Lobos, San Francisco, California

“ERRG has been very easy to work with and receptive to all comments. They have modified work to ensure we’re getting all of the contaminated material based on visual observations and continue to reduce the dust generated from driving and loading trucks.”

Elyssa Dixon, URS Corporation — Soil and Sediment Excavation and Disposal, Former Gun Club, Boeing Everett Plant, Everett, Washington

“I wanted to thank ERRG for the outstanding work completed on this project.  The ERRG project team was extremely responsive to dynamic field challenges and consistently demonstrated focused attention to all aspects of health and safety as well as to the demanding technical details of this project. It has been a true pleasure working with you all.”

Adam Ng, SLAC National Accelerator Laboratory — Hydrodynamic Separator Unit Installation at IR-6 Drainage Channel Area, Menlo Park, California

“ERRG’s corporate management team worked closely with the Corps of Engineers to provide Fort Irwin with excellent customer service.”

Thad Fukushige, U.S. Army Corps of Engineers — Military Munitions Range Maintenance Support, National Training Center, Fort Irwin, San Bernardino County, California

“The management team that ERRG put together for this project was one of the best to work with. From the excellent communication skills across all disciplines to the level of professionalism, knowledge, and transparency compiled together with high levels of technical expertise were the building blocks to solid performance and execution throughout the contract. This team effectively kept the regulators and stakeholders involved throughout the entire process resulting in a much easier open communication platform.”

Laura Percifield, U.S. Army Corps of Engineers — Rocket Range Removal and Completion, Former Lowry Gunnery and Bombing Range, Aurora, Colorado

“I would like to thank the project team for making this project a success despite the challenges we faced. I would like to especially thank ERRG for their integrity and professionalism, which is not common in the construction business. You made my job easy and it was a pleasure working with you, and I hope we have a chance to do so again.”

James Sakai, San Francisco Public Utilities Commission — Pacific Rod and Gun Club Remediation, John Muir Drive, San Francisco, California

“I appreciate your flexibility. You and your team have been very professional and team-oriented. We couldn’t ask for a better group to be a part of the Travis team.”

Shannon Wright, CH2M — Construction of Solar-Powered Groundwater Treatment System, Travis Air Force Base, California


  • Bureau of Land Management
  • National Park Service
  • Presidio Trust
  • U.S. Air Force
  • U.S. Army Corps of Engineers
  • U.S. Coast Guard
  • U.S. Department of Energy
  • U.S. Department of the Navy
  • U.S. Environmental Protection Agency
  • U.S. Forest Service


  • American Samoa Power Authority
  • California Department of Toxic Substances Control
  • California Department of Parks and Recreation
  • CalRecycle
  • City and County of San Francisco
  • East Bay Municipal Utility District
  • Hawaiian Electric
  • Imperial Irrigation District
  • Pacific Gas and Electric Company
  • Ross Valley Sanitation District
  • San Francisco International Airport
  • San Jose Water Company
  • Southern California Edison
  • Washington Department of Ecology

Engineering Firms

  • AECOM/Amentum
  • APTIM Environmental & Infrastructure
  • Battelle
  • Bayside Engineering Construction
  • Black and Veatch
  • CH2M Hill/Jacobs
  • Ecology & Environment
  • Environmental Chemical Corporation
  • Janus Global Operations
  • Lewis and Tibbitts
  • Parsons
  • Perma-Fix Environmental Services
  • Roux Associates
  • Stantec
  • Tesoro/Avon Remediation Team
  • Tetra Tech
  • Trihydro Corporation
  • Versar


  • Abbott Laboratories
  • Aerojet
  • Boeing Company
  • Granite Construction
  • Lennar Corporation