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0 <br /> GEOMATR1X <br /> . ALTERNATIVE 1 <br /> NATURAL ATTENUATION Page 1 of 1 <br /> PRELIMINARY COST ESTIMATE <br /> Former ContiGroup Grain Elevator <br /> 1805 Harbor Street <br /> Stockton, California <br /> Assumption <br /> 1 Free product removal will be performed once per month for six months from 2 new extraction wells <br /> installed in the area of the former tank exacavation <br /> 2 Quarterly monitoring will be performed for two years during the site closure process <br /> Notes <br /> The following costs were estumted based on a conceptual design of the remedial action and readily available cost <br /> information on labor and material typical for similar projects The actual costs for this project may vary depending on the <br /> final design,contract bids,agencies'requirements, and/or the availability of equipment,materials, and/or contractors at the <br /> time of final remedial action design construction and/or implementation <br /> TASK <br /> ACTIVITY QUANTITY UNIT UNIT$ COST S SUBTOTAL$ <br /> NATURAL ATTENUATION <br /> ' Free Product Removal and Risk Assessment 34,000 <br /> Install 2 extraction wells 2 each 2,500 5,000 <br /> lieVacuum truck pumping of wells, disposal 6 each 1,500 9,000 <br /> Human Health Risk Assessment 1 lump sum 20,000 20,000 <br /> Site Closure Activities 66,100 <br /> County well abandonment permit 1 lump sum 500 500 <br /> Quarterly groundwater monitoring 2 year 16,000 32,000 <br /> Abandon monitoring wells 1 lump sum 10,000 10,000 <br /> Field work oversight and coordination 30 hr 120 3,600 <br /> Site closure request report 1 lump sum 20,000 20,000 <br /> NATURAL ATTENUATION $ 100,100 <br /> ACTIVITY QUANTITY UNIT UNIT S COST$ SUBTOTAL$ <br /> 15%project management cost 015 $ 100,100 15,000 <br /> 20%contingency cost 02 $ 100,100 25,000 <br /> TOTAL $ 140,100 <br /> 1 IDoc_Safe19000s199631CAKAppS Alternatives As 1016/20049 51 AM <br />