The Old Inger hazardous waste site is located midway between the cities of Baton Rouge and New Orleans in Ascension Parish, Louisiana. The site was utilized as an oil refinery and oil reclamation plant from 1967 to 1978. Approximately 41,600 cubic yards of waste oils, and heavily contaminated soils, sludges, and sediments plus 2.5 million gallons of highly contaminated surface water and 7.5 million gallons of slightly contaminated swamp water remain on-site. The waste materials include oil contaminated with hazardous petrochemicals, various oil additives, and oil combustion products. In addition, ten million gallons of slightly contaminated ground water containing hazardous constituents are present in the shallow aquifer. The cost-effective remedy includes: closing and sealing of an on-site well; pumping and treatment of the shallow ground water aquifer via carbon adsorption; carbon adsorption treatment and discharge offsite of contaminated water; in-situ containment and capping of slightly contaminated soils; and on-site land treatment of heavily contaminated soils and sludges. Decisions on the need for corrective action for the intermediate aquifer, the level of cleanup for the shallow aquifer and the contaminated wood remedy were deferred. The capital cost for the selected alternative is $3,174,000 and annual O&M costs are estimated to be $10,000.