The following projects provide a representative sample of above ground sites we have been involved with.The sites below were all closed using bioremediation and land farming techniques.
1.Admiralty Island, Alaska – Cube Cove Logging Camp cleanup – Glacial Till diesel and motor oil with some solvents.TPH over 10,000 ppm. Cleaned up 25,000 tons in 90 days with degradation within 15 days.
2.Icy Bay, Alaska – Logging Camp cleanup – Glacial Till diesel and motor oil with some solvents.TPH over 10,000 ppm. Cleaned up 31,000 tons in 90 days with degradation within 20 days.
3.Oxnard, CA - Industrial redevelopment - Silty sand - Weathered gasoline & diesel TPH over 5,000 ppm.Landfarm.Clean in 30 days.Site Closed.
4.Paramount, CA - Metalsfabricator - Cutting oils and solvents from drum storage.Sandy silt.TPH levels over 83,000 ppm.Levels reduced 95% in 30 days.
5.Riverside, CA - Airport - Decomposed Granite - Jet A fuel TPH up to 15,000 ppmunder 100 ppm in 45 days.Site Closed
6.Santa Fe Springs, CA - Industrial Site - Sandy clay -diesel, gasoline and motor oil.TPH prior to treatment 5,000 ppm,thirty five days thereafter levels below 500 ppm.Site closed.
7.San Diego, CA – Concrete Plant - Clay soil contaminated with waste oil levels up to 9,600 ppm. Six weeks after treatment began TPH levels were reduced by 90%. Site closed.
8.San Diego, CA - Gas Station - Clay soil contaminated with waste oil levels up to 5,000 ppm. Two months after treatment began TPH levels were reduced by 90%. Site closed.
9.Baldwin Park, CA - Gas Station - Sandy soil - Gasoline.Above ground treatment cell treated in under 30 days.Site closed.
10.San Juan Capistrano - Agricultural tanks - Silty sand, gasoline and waste oil.Landfarm.Cleaned up in 45 days.Site closed.
11.La Habra, CA - School District Maintenance Facility - Clay-sand - Gasoline. Landfarm.Cleaned up in 45 days.Site closed.
12.Covina, CA - Car Dealership, above ground cleaned in 3 weeks.Site closed..
13.Pomona CA - Redevelopment District- Clay-sand - Gasoline. Landfarm,.Cleaned up in 30 days.Site closed.
14.Spring Valley, CA - Truck yard - Clay-sand - Diesel.Landfarm.Site closed.
Representative In-situ bioremediation projects closed in southern California:
1.Hyatt Islandia Hotel, Mission Bay, San Diego, CA
Contaminant:Diesel levels as high as 144,000 ppm
Description:Two plumes under a parking garage/hotel located on Mission Bay.Contaminated smear zone about 5 feet bgs.Daily tidal action.Salt water.Owner had tried a vapor extraction system for four years with no results.Started with .25" of free product on water.After 30 days free product was gone.Last three quarters showed water at non detect and soil TPH levels reduced by 85%.
Lead Agency:County of San Diego, Hazardous Materials Management Division
2.Fletcher Jones Site , City of Los Angeles
Contaminant:Diesel levels as high as 44,000 ppm
Description: Plume 35' deep underparking and building. Used infiltration trenches and sumps to distribute inoculate to plume.Soil TPH levels reduced by 85%.
Lead Agency: Los Angeles Bureau of Fire Prevention and Public Safety
3.Van Nuys Airport, J & D Air
Contaminant:Jet A Fuel levels exceeding 25,000 ppm
Description:13,000 cubic yard plume down 95 feet below grade.Hydrant line spilled 30,000+gallons of Jet A fuel into soil.After 4 months TPH levels below state action levels.Project Closed after 8 months.
Lead Agency: City of Los Angeles Fire Department
4.White Memorial Hospital, Los Angeles, CA
Contaminant:Diesel with levels exceeding 15,000 ppm.
Description:800 cubic yards soil down to groundwater at 25'.Remaining from leaking underground tank removed in 1988.Bioventing system including air injection into groundwater and vadose zone.Closed after 10 months
Lead Agency:Los Angeles Regional Water Quality Control Board.
5.Voit Properties, Warner Center, Oxnard CA
Contaminant:Diesel with levels exceeding 6,000 ppm.
Description:1,200 cubic yards soil down to groundwater at 12’ bgs.Bioremediation system included pumping groundwater, treating adding a bioinoculate and reintroducing back to soil through infiltration trenches.After 8 months soil levels below action levels.
Lead Agency:Los Angeles Regional Water Quality Control Board.
7.NuWay Car Wash, Monrovia CA
Contaminant:Gas & Diesel levels over 85,000 ppm
Description:Plume under dispenser islands.Contaminatedzone 18 feet deep.
Project permitted by LAPW Voluntary Oversight.Site Closed in under 6 months
