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Work Plan for Underground Storage Tank Upgrade 3 Southland Store No 20632,4627 DaVinci Drive Stockton,CalEfomra August 10 4998 groundwater hauling, samples will be collected and analyzed for constituents required by the respective disposal facilities Tank pit water will be hauled by Integrated Waste Stream Management, Inc of Milpitas, CA to Seaport Environmental in Redwood City, California for recycling Soil removed from the site will be hauled by Belshire Environmental Services, Inc or a subcontractor of Belshire to T P S Technologies, Inc in Richmond, CA for proper treatment Source Area Remediation Any excavation of soils and/or groundwater withdrawal at the site will be conducted with the primary goal of facilitating construction activities Some limited overexcavation (less than 20 cubic yards) of hydrocarbon-containing soils will be conducted at the site as source removal remediation, as long as such work can be completed without adversely impacting construction schedules Removal of soils which are too wet to be used for backfilling may be required, whether or not these soils contain hydrocarbons Waste segregation will be conducted using field and/or analytical criteria, to allow use of onsite soils for backfilling purposes whenever possible All stockpiled soil will be sampled prior to removal from the site or being used as backfill material One discrete soil sample will be collected for every 50 cubic yards generated at the site The samples will be analyzed for BTEX, TPH-G by EPA Methods 8015/8020, and the oxygenates TBA, MTBE, DI PE, ETRE, TAME by EPA Method 8260, or as required by disposal facility Oxygen-releasing compound (ORC) may be inserted in bulk form (powder) in the underground storage tank pit area as approved prior to field operations by the SJCDEH Application of approximately 90 lbs of ORC powder is proposed as a means of stimulating passive biodegradation in the hydrocarbon source area (Attachment B) Groundwater Monitoring WeII Abandonment Abandonment of groundwater monitoring well MW-4 will be completed prior to underground storage tank upgrade proceedings (See attached figure) The well will be destroyed following guidelines set forth in California Department of Water Resources Bulletins 74-81 and 74-90 for well destruction This well is within the proposed area of excavation and will need to be removed Permits for the well destruction will be applied for from the SJCDEH The casing of the well will be drilled out to total depth 20632SJC LTR FLUOR DANIEL GTI 1k5-