SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Alternative Technical Effectiveness Implementability Cost Overall Effectiveness(a) Ranking • Overall cost effectiveness -moderate Biosparging Effective in reducing • Easily • Expected to High bulk mass of COPCs in implementable; be moderate gravelly,sandy soil layer . Should take no based on the but limited in silty and more than six expected level clayey soil layer, months after of O&M • May take a long time to completion of pilot activities; achieve target cleanup test and system • Estimated goal-, design to begin ROM cost- • Overall effectiveness- treatment; $0.6 million moderate No air or POTW • Overall cost permits needed, effectiveness minimizing lead - high time required; • Overall implementability- high In-situ chemical • Effective in reducing Implementable but Expected to Moderate oxidation bulk mass of COPCs in require a field pilot be high due to to high gravelly,sandy soil layer test to complete amount of but somewhat limited in system design-, oxidant likely silty and clayey soil Should take no used and the layer; more than six need to • May not take as long a months after address the time as the other completion of pilot COPC in the altematives to achieve test and system silty and target cleanup goal; design to begin clayey soil • Overall effectiveness- treatment; layer,along moderate to high Fewer permits with the needed than associated groundwater pump level of 0&M and treat and air activities; sparging with SVE Estimated -less lead time ROM cost- before treatment $1.0 million begins; Overall cost • May require effectiveness additional system -moderate control measures depending on permit requirements; • Overall implementability- moderate to high (a) The estimated ROM cost for each alternative is determined based on a treatment period of 15 years (anticipated worst case scenario) and an interest rate of 4% for present worth cost comparison purposes. Final FS_Onsae Petroleum Hydrocarbon RenWia0on 5-2 Shaw Environmental,Inc.