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TABLE I <br /> Remediation Feasibility Matrix <br /> Ranch Market <br /> • 23596 South Santa Fe Road <br /> Riverbank California <br /> Estunated E <br /> Duration of Task Cost Number of Estimated Option <br /> Remediation Events Costs Cost Feasible') <br /> Option 1 Soil Excavation and Disposal <br /> 15 years Monitoring and Sampling $20000 15 $300000 No <br /> Subtotal $300,000 <br /> Soil Excavation 30 feet by 40 feet and 30 feet dee <br /> 1 report RBCATier 11 with Groundwater Modeling $7000 1 $7,000 <br /> 8 days Oversight $1000 8 $8000 <br /> 1 333 CY Excavation&Backfill(40 by 30 by 30) $20 1 333 $26667 <br /> 1 CY Shoring $100000 1 $100000 <br /> 1733 CY Load and Haul Soil To Forward $15 1 733 $26,000 <br /> 1 333 CY Landfill Fees $20 1 333 $26667 <br /> 1 report Summary Report $15000 1 $15000 <br /> Subtotal $209,333 <br /> CLOSURE COSTS <br /> I report Closure Report and Well Dest Work Plan $2500 1 $2,500 <br /> 5 parcels Permit S.ICEHD Well Destruct Permits $100 5 $500 <br /> wells death Wells to be Destroyed Feet <br /> 9 40 Groundwater Monitoring Wells $11 360 $3,960 <br /> 1 70 Deep Groundwater Monitoring Well S11 70 $770 <br /> 6 30 Soil Vapor Extraction Wells $11 180 $1,980 <br /> 1 45 Air Sparge Wells $11 45 $495 <br /> 1 event Disposal of well boxes and surface soil $400 1 $400 <br /> 3 days Field Oversight&Coordination $900 3 $2,700 <br /> 1 report Well Destruction Summary Report $1,000 1 $1000 <br /> Subtotal $14,305 <br /> Soil Excavation Remediation Costs $523,638 <br /> Costs associated with facility shutdown and replacement,and lost business have not been included <br /> Excavation will not address soil and groundwater impacted by lateral migration of gasoline <br /> Option 2 Passive Biodegradation <br /> 20 years Annual Monitonng and Sampling $20,000 20 $400,000 No <br /> 1 report RBCATter 11 with Groundwater Modeling $7,000 1 $7,000 <br /> Site Closure Costs <br /> 1 event Same Closure Costs as listed in Option 1 $14,305 1 $14,305 <br /> $42"05 <br /> Doesn't address migration of dissolved MtBE Plume or the gasoline adsorbed to soil in the vadose zone <br /> Option may be feasible at end of active remediation <br /> Option 3 In-situ Biologic and/or Chemical Treatment <br /> 15 years Annual Monitoring and Sampling $20,000 15 $300 000 No <br /> 1 report RBCATier 11 with Groundwater Modeling $7,000 1 $7,000 <br /> 10 events injection Treatments $20000 10 $200,000 <br /> CLOSURE COSTS <br /> event Same Closure Costs as listed in Option 1 $14305 1 $14305 <br /> $507,000 <br /> Doesn't address the gasoline adsorbed to soil in the vadose zone <br /> Option may be feasible at end of active remediation <br /> File RanchlTables\PAR Cost Est1RM Remediation Matrix Table As Page i of 4 <br />