Fuel Farm Remediation - Marine Corps Air Station Yuma, Arizona

This project included the characterization and remediation of a JP-8 fuel release resulting from a large above ground storage tank (AST) release. Within four months, our environmental engineering division designed, installed, and operated the Soil Vapor Extraction (SVE) system on site.

The site plan included concrete pad, piping plan, fencing, access gates, electrical layout, and SVE system for the removal of JP-8 from the subsurface soil. Due to the adjacent free product plume, we designed and installed a series of passive inlet wells to create an air barrier between the site and the adjacent free product plume. Our innovative approach to this subsurface condition prevented co-mingling of the contaminant plumes.

As a full service engineering and construction team, our personnel designed, installed, and continues to operate and maintain the SVE system. This project was completed on time and within the original budget and no change orders were incurred.

LEPA Site Marine Corps Air Station Yuma, Arizona

The Operational Unit 1 (OU-1) Leading edge of Plume Area (LEPA) was originally installed to remove chlorinated solvents using a Vertical Circulation Treatment (VCT) System. In December of 2005, groundwater cleanup objectives were achieved at the LEPA; therefore, the VCT system was shut down.

Recent groundwater sampling indicated that contaminant levels at the site have been increasing. MCAS Yuma responded by contracting our team to complete all maintenance and repairs required to return the system to operational status and begin operating the system once again.

Our staff completed an Accident Prevention Plan (APP) and Site Safety and Health Plan (SSHP) in accordance with EM-385. Once approved by the Navy Environmental Health Center and the NAVFAC SW safety officer, we began full scale field activities. Our Scope of Work included: sampling and replacement of the spent carbon; inspection, abandonment and replacement of extraction and injection wells; replacement of submersible and transfer pumps, and replacement of all system filters and meters. Upon successful repair and upgrade of the system, we were contracted through NAVFAC SW to operate and maintain the VCT.

Our full service capabilities allowed us to satisfy the needs of MCAS Yuma and NAVFAC SW, from safety document preparation, through construction, and operation /maintenance of this critical remediation system.

Point Loma DFSP Tank Replacement Project - San Diego, California

The Defense Fuel Support Point (DFSP) Fuel Depot at Naval Base Point Loma contains 33 aboveground and 24 underground bulk fuel storage tanks, confirmed to have releases to the subsurface.

The scope of work included the review and approval of the Site Safety and Health Plan for all site work and tank work. Services included the personal air monitoring for the Confined Space Entry Team to determine benzene exposure and developed a negative exposure assessment for benzene during tank cleaning.

This bulk fuel tank demolition project was immediately adjacent to a residential neighborhood and child care facility. To ensure that the general public was not exposed to elevated air contaminant concentrations or excessive noise levels, our team prepared a Perimeter Air and Noise Monitoring Plan in accordance with the Environmental Protection Plan. Contaminants of concern were identified and included Benzene, Toluene, Ethyl benzene, Xylene (BTEX); Benzo(a)pyrene, Benz(a)anthracene, Naphthalene (PAHs; Petroleum Distillates, PM10 and PM2.5.

GCE developed an innovative three-phase strategy to reduce the cost of long term analytical sampling, saving the client millions of dollars in analytical fees over the life of the project.

Munitions Treatment Range - Marine Corps Air Station Yuma, Arizona

The Munitions Treatment Range (MTR) facility is used for the treatment/demilitarization of unserviceable, out-dated, or obsolete munitions. GCE manages all services completed in support of compliance with the RCRA Hazardous Waste Permit for the MTR.

Our team prepared the Sampling and Analysis Plan (SAP) and Quality Assurance Project Pan (QAPP) and conducts the sampling, reporting, and training required by the MTR RCRA permit. Post detonation soil sampling is conducted using Direct Push Technology (DPT). All samples were collected and analyzed for the Contaminants of Potential Concern (COPCs), including perchlorate, white phosphorous, RDX, HMX, di-nitrotoluenes and di-nitrobenzene. Our services to MCAS also include identifying, sampling and closing Solid Waste Management Units (SWMUs); preparing the associated Class I and II Permit Modifications; and providing training to military personnel to increase overall knowledge of RCRA and general permit requirements.

Cibola Impact Range Environmental Assessment - Yuma Proving Ground, Yuma, Arizona

Our team was contracted to complete the NEPA documentation for the designation of 20 new impact areas in the Cibola Region of the Yuma Proving Ground. Our team defined the project scope, reviewed all impact categories, met with appropriate agencies, identified interested parties for scoping correspondence, conducted the site visit, and drafted the EA for submission to the U.S. Army Garrison at Yuma Proving Ground. The EA included a cultural resource survey and biological evaluation.

NEI successfully completed this EA on time and within budget.

Permitting/Environmental Compliance - Arizona State Parks

Arizona State Parks contracted NEI to bring existing sanitary sewage collection systems, wastewater treatment facilities, and water treatment systems into compliance with current ADEQ requirements. Many of these facilities - including on-site sewage treatment plants, septic and leach field disposal systems, evapotranspiration beds, and effluent reuse facilities - were undocumented and in an advanced state of disrepair. NEI performed a multi-park investigation and determined the most cost-effective solutions available which would have the least impact on park operations. Though this project is ongoing, many of the goals as set forth by the Arizona State Parks have been successfully completed to the satisfaction of the client.

City of Yuma Environmental Consulting Services Contract - Yuma, Arizona

NEI currently holds an On-Call Contract with the City of Yuma for Professional Environmental Consulting Services. This contract issues work orders for any professional environmental services required by the City of Yuma. NEI has a proven track record in providing professional, quality services and advice in a timely manner. We have managed Phase I and Phase II investigations, asbestos, lead based paint, microbial, and indoor air quality projects for the City of Yuma at many facilities. Our work experience with the City of Yuma includes: Asbestos Inspections/Management, Microbial Investigations/Management, Indoor Air Quality Evaluations, and Environmental Sampling. This on-call project demonstrates NEI's ability to successfully complete professional environmental services and ensure compliance with environmental regulations for our clients.

Yuma County General Services, Environmental Services Contract - Yuma, Arizona

NEI currently holds the On-Call Yuma County General Services Contract for Professional Environmental Hazard Testing Services. This contract issues work orders for any professional environmental service required by Yuma County. NEI has a proven track record in providing professional, quality services and advice in a timely manner. We have managed asbestos, lead based paint, microbial, and indoor air quality projects for Yuma County at many facilities including the Yuma County Jail, Yuma County Sheriff's Office, Yuma County Courthouse, Board of Supervisors, Fiduciary Building, Adult Probation, Wellton Justice of the Peace, Somerton Justice of the Peace, and many others. Our work experience with Yuma County includes: Asbestos Inspections/ Abatement, Microbial Investigations/ Abatement, Indoor Air Quality Evaluations, Environmental Sampling, Safety Inspections, Development of Programs, SOPs, and Environmental Training of Yuma County Personnel. Many of the work orders that we have been tasked with have occurred after hours or during the weekend. NEI prides itself in responding immediately to the needs of our clients. This on-call project demonstrates NEI's ability to immediately respond and successfully complete professional environmental services and ensure compliance with environmental regulations for our clients.

Tacna Shay Oil, Leaking Underground Storage Tank - Tacna, Arizona

NEI conducted the soil and groundwater investigation after three 12,000 gallon underground storage tanks were removed from the existing fuel station. NEI completed the site characterization of the site in accordance with ADEQ requirements to define the vertical and lateral extent of contamination. The site characterization involved drilling soil borings and installing a network of monitoring wells to define the extent of the free phase hydrocarbon plume and groundwater plume. Free phase hydrocarbons are currently being recovered from the site to comply with ADEQ requirements. Our team is currently preparing the Corrective Action Plan to develop an in-situ remediation system to remediate the groundwater and soil contamination on site without interrupting the operation of the fuel station.

Yuma International Airport, Phase I Environmental Assessment - Yuma, Arizona

NEI has prepared hundreds of Phase I and Phase II Environmental Assessments on various types of properties. NEI prepared the Phase I Environmental Site Assessment in accordance with ASTM 1527-05, and the Environmental Assessment (EA) in accordance with NEPA, FAA, DOT, and the Council of Environmental Quality. The purpose of the project was to acquire 8 parcels comprising of 82.7 acres of private property located adjacent to the YIA site to prevent long term problems with encroachment. In addition, the contiguous site would allow for future airport improvements. Our team successfully completed the EA by partnering with the YIA early on to define the project scope. We researched the potential impact categories, and identified interested parties for scoping correspondence. Our environmental team conducted a thorough site visit, completed the biological survey, cultural resource survey, and completed all necessary documentation for the completion of the land transfer in accordance with FAA guidelines.

Yuma Crossing National Heritage Area Corporation, Asbestos and Lead Paint Testing - Yuma, Arizona

NEI quickly responded to the needs of the Yuma Crossing National Heritage Area Corporation when three historical units came available for remodel and purchase. The three structures located in downtown Yuma are an integral part of the historical make up of the City of Yuma. NEI was tasked with an environmental site assessment, asbestos inspection, and lead based paint inspection. NEI conducted a through asbestos inspection of the three structures, taking care not to destroy/disrupt the historical integrity of the structures, by collecting bulk samples of each homogenous building material and shipping the samples to a certified asbestos testing laboratory for analysis. An asbestos report was developed, based on the analytical results, and provided to the Yuma Crossing National Heritage Area Corporation. NEI was also tasked with providing oversight for the lead-based paint inspection of the three historical structures. Since the three structures are of a historical nature, the portable x-ray fluorescence (XRF) spectrum analyzer was utilized to prevent further damage to the structures. A lead-based inspection report was developed for each structure and provided to the client.

Araby Acres, Hydrogeologic Study - Yuma, Arizona

NEI prepared the geologic and hydrogeologic study in support of the Aquifer Protection Permit for 30 individual septic systems currently serving 338 RV lots located at the Araby Acres RV Resort. In addition, a groundwater mounding analysis was performed to demonstrate the groundwater rise with continued operation of the on-site wastewater treatment system. NEI's team successfully demonstrated that the on-site wastewater treatment system will not cause an adverse impact to the underlying aquifer.

San Luis Port of Entry II - San Luis, Arizona

The Greater Yuma Port Authority developed a new commercial port of entry at the border with Mexico, 4 miles east of the city of San Luis, Arizona. This project includes 2.5 miles of new 12" water main, 1.5 miles of new 6" sewer force main, a new sewer lift station, 2.5 miles of new paved roadway, a hydrological study of the 347 acre site for drainage work, and on-site stormwater retention. While our civil design team was planning the infrastructure improvements, our environmental professionals ensured that the management strategy was to preserve critical habitat was followed. In accordance with the Section 7 consultation from USFWS, NEI designed a Flat Tailed horned Lizard (FTHL) protective fence to be installed around the perimeter of the property planned for development. NEI prepared the plans and specifications and supervised the installation of the FTHL protective fence. After installation, a team of NEI biologists completed the biological field survey on the 347 acre site in accordance with the mitigation. Our team also conducted the training for all on-site personnel to ensure that all site workers could recognize the FTHLs and contact appropriate personnel for relocation. NEI continues to provide quarterly inspection services to comply with USFWS requirements. This project demonstrates our ability to design biological protection features and maintain compliance with agency requirements to protect threatened species and critical habitat.

River Island Water Treatment Plant Improvements - Parker, Arizona

The water system at River Island State Park was in a severe state of disrepair. The existing water tank was severely corroded. NEI designed an upgraded system that included a new hydro-pneumatic pressure tank, a new above-ground storage tank, three (3) new pressure booster pumps, a Marlo Greensand filter, and distribution system connections. This project was approved by ADEQ and constructed in 2011.

City of Yuma HUD NEPA Assessment - Yuma, Arizona

Improvements to the City of Yuma's public housing were necessary to replace and improve deteriorating driveways, exterior walls (paint), flooring, appliances, and fixtures. The properties are managed by the Housing Authority of the City of Yuma (HACY). The project consisted of making improvements to 34 public housing properties using HUD Capital Fund Program monies. The properties were located through-out the City of Yuma. NEI was tasked with completing the NEPA documentation for the rehabilitation project. Our team defined the project scope, reviewed all impact categories, met with appropriate agencies, conducted the site visit, and drafted the EA for submission to HUD. The EA included a cultural resource survey and biological evaluation. NEI successfully completed this EA on time and within budget, demonstrating our ability to prepare NEPA environmental documents for HUD approval.

Hilton Garden Pivot Point Hotel Groundwater Remediation - Yuma, Arizona

NEI responded to the needs of the City of Yuma when soil staining was discovered during removal and excavation of settling basins on the site. NEI worked with the contractor to remove, characterize, and properly dispose of all contaminated soil. NEI defined the groundwater contamination plume and identified the presence of a free product plume. Our team designed a free product recovery system to remove the free phase hydrocarbons from the aquifer. During the design and construction of the existing Hilton Garden Pivot Pont Hotel, NEI worked with the architect and the City of Yuma to design an in-situ remediation system that would not disrupt construction activities. NEI designed a free product recovery system that included an oil-water separator discharging into the City of Yuma sewer system.