Environmental/Remediation Projects

The following are brief synopses of several completed projects that represent only a fraction of the work performed by our professionals:

Airport Mobil Service Station, Territory of Guam - AGS conducted several Phase II Environmental Site Assessments (ESA) and Groundwater Monitoring Events of the site. Additional long-term groundwater monitoring and risk assessments were conducted on the remaining waste oil contamination located in the subsurface limestone formation. These risk assessment activities were the first to be completed for the Guam Environmental Protection Agency (GEPA) and the USEPA in the Micronesian region.

Chip's Chevron, Jamestown, California - AGS removed four UST from the site. Remedial excavation activities were subsequently conducted to remove approximately 800 cubic yards of petroleum hydrocarbon impacted soil and install oxygen release compound at the site.

Engelhard Petroleum Catalyst Manufacturing Plant Demolition and Site Remediation, Salt Lake City, Utah - Cherokee Environmental Risk Management issued a $3,371,00 contract to AGS to demolish, segregate, and load out for disposal an/or recycling the manufacturing facility and all support buildings, warehouses, and storage tanks. The project included remediation of 27 Solid Waste Management Units associated with the production facility, and stabilization of approximately 1,000,000 cubic yards of alum sludge located on 230 acres of ponds.

French Gulch Wellington Oro Mill, Colorado - AGS conducted site and regional characterization studies in conjunction with the State of Colorado, U.S. Geological Survey, U.S. Environmental Protection Agency, and the U.S. Bureau of Reclamation. The characterization studies included surface mine waste characterization, mine pool characterization, surface and ground water quality studies, continuous ground water level monitoring, well monitoring, aquifer testing, stable isotope tracer, and a salt-tracer Injection study.

Cabras Mobil Bulkplant Terminal, Cabras Island, Territory of Guam - AGS conducted several Phase II Environmental Site Assessments (ESA) and Groundwater Monitoring Events of the site. The activities were conducted after a catastrophic typhoon fire occurred at the facility in 2004, resulting in the destruction of 4 bulk storage tanks.

Marpi Point Hydrogeology, Saipan Island, CNMI - AGS conducted extensive hydrogeologic studies for Asiana Airlines to provide 2,000,000 gallons per day of freshwater for two golf courses and a hotel and condominium complex proposed at Marpi Point, Saipan. The scope of work included: well drilling, saline aquifer profiling, extensive long term pump testing; ground water tidal fluctuation monitoring; water quality analysis; geophysical testing; hydrologic modeling; calculation of saltwater upcoming and permissible pumping rates; design of fresh water lens collection tunnel system; salt water barrier
well system design; and ground water recharge system analysis.

Jimtown Whistle Stop, Jamestown, California - AGS conducted Phase II Environmental Site Assessments (ESA) and Groundwater Monitoring Events after a product release occurred from a gasoline UST. Fractured bedrock underlying previously dredged stream sediments complicated the groundwater flow pattern. Approximately 7,500 cubic yards of gasoline and diesel contaminated soil and bedrock were excavated and remediated from the site.

Marianas Cleaners, Saipan Island, CNMI - AGS conducted a soil and groundwater investigation at the dry cleaning facility after a nearby water well became impacted with TCE and OCE. A groundwater treatment system was subsequently installed and over 40 million gallons of contaminated water have been successfully treated.

Phase I/II/III/IV ESA Group Portfolio Project including, 11 Service Station, 15 Dealer Cites, and 1 Terminal Facility, Territory of Guam
- AGS conducted several Phase I/II/III/IV Environmental Site Assessments (ESA) of 27 facilities on the Island o Guam, concurrently. The Phase II ESA included an Amplified Geochemical Imagingtm Survey, and the Phase III/IV ESA included soil boring and monitoring well installation. These Environmental Site Assessment were conducted as part of ExxonMobil International Holdings, Inc due diligence regarding the sale of the sites and the Exxon merger agreement.

Pagan Volcanic Evaluation, Pagan Island, CNMI - AGS was contracted by Pacific Ventures, Ltd. to write a geology, environmental, and construction material resource report, and a preliminary volcanic hazard report for the uninhabited island of Pagan. The island's volcanic centers are still active with the most recent eruption occurring in May of 1981. this eruption produced thick deposits of volcanic ash that may provide a good source of possolan for the cement industry.

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