ARCHIVED REPORTS XR0003382 - Laserfiche WebLink

Home Browse Search

SITE CONCEPTUAL MODEL AND REMEDIAL ACTION PLAN g 16 7-Eleven Store No 14117,2725 Country Club Blvd , Stockton, CA June 20 2002 52 Installation Costs ' Installation costs Include treatment compound construction and installation, subsurface installations (system piping and utilities hookup), design drawings Including electrical one-line diagrams, utilities deposits, applicable permitting costs, fees, and permit Inspections Installation costs Include all ' subcontractor fees and oversight charges System startup and trouble-shooting are also Included In costs for system installation Installation costs for excavation Include short-term rental of excavation equipment, ' shoring, dewatering, and waste disposal of excavated soils and dewatering waste Costs Include all subcontractor fees and oversight charges System installation costs range between $80,000 to over$300,000 (with permits Included), Including remediation system treatment wells 53 Monthly O&M Costs ' Operation and maintenance costs include monitoring of influent and effluent concentrations and flowrates as required by operating permits Also Included is checking system function and adjusting flowrates and ' intake levels as necessary to optimize system performance and efficiency Laboratory charges for analysis of samples to ensure permit compliance, utility costs, technical oversight of system operation, M and costs to prepare reports as required for the various regulatory agencies having jurisdiction over system operation and site remediation are also part of routine operation/maintenance Monthly operation and maintenance costs also Include disposal costs of used materials, and routine equipment maintenance and minor repairs I The unit cost per month is estimated to be about$5,000 per month ' Groundwater monitoring costs are not included in operation and maintenance cost calculations 54 Life-Cycle O&M Costs The life-cycle cost of each option represents the combined capital, installation, and monthly operation and maintenance costs for the total length of remediation, which is assumed for cost comparison purposes as two years (except for excavation), barring any additional releases Results of total cost comparison (life- cycle) are shown on Figure 4, Feasibility Cost Comparison Based on cost and feasibility evaluations, DPEIIB is the most cost-effective feasible alternative, followed by ASISVE Pilot testing for AS/SVE has not been conducted at this site If the proposed method is not successful at reaching remedial goals, this treatment alternative may be evaluated as a ' supplemental/replacement process to the one proposed 14117Scm2doc