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' ealteal Tecluucs Inc Page 8 G og George's Service Feasibility Study Project No 425 2 April 28,2004 ' Wellhead Modifications 4,000 Trenching[Plumbmg of VETS ' Including horizontal boring across Durham Ferry Road 15,000 Sample Collection, Maintenance and Monitoring 7,500* Sample Analyses 3,500* ' Permitting 500 $109,500** * Annual Estimate ** Pius the Cost of Water Treatment(Estimates in Sections 3 3 1 and 3 3 2) ' 3.3 1 Off-Site Water Treatment Primarily off-site treatment consists of storing the contaminated groundwater in a baker tank on-site until approximately 5,000-gallons has accumulated American Valley Waste ' Oil Company will mobilize to the site, once 5,000-gallons has accumulated, pump the water from the baker tank and transport the water for treatment at Seaport Environmental, located at 675 Seaport Blvd , Redwood City, CA, 94063 ' GTI personnel are on-site twice a month and pick-up of the contaminated water can be scheduled during monthly DPE treatment system monitoring or blower maintenance periods No additional man-hours will be necessary to oversee water disposal unless ' unusual volumes are accumulated At a site with a high water table, DPE systems can produce volumes of 200 gallons per hour This would translate to 4,800 gallons per day requiring daily water disposal runs For the purpose of this cost analysis it will be assumed that 4,800-gallons per day will be generated ' The following estimates are based on similar work at other sites A three bidding process will be used to determine actual costs upon approval of a Corrective Action Plan This is obviously not the solution ' Estimated Monthly Costs Estimated Annual Costs Description Water disposal $115,000 $1,385,000 It is obvious that hauling the treated water is not an option The other possible solution would be to dispose the treated water to the surface water canals or to land Both of these would require the preparation of a report of waste discharge, permit application, and an ' NPDES or WDR permit through the RWQCB The cost of obtaining these permits can run up to $40,000 and the monitoring cost would be determined on the permit limitations and requirements It would be hard to place a value to this cost at this point, but it would ' definitely be less expensive then hauling the water 3.3.2 On-Sate Water Treatment ' On-site treatment consists of treating the contaminated groundwater via carbon units, storing the treated groundwater in a baker tank on-site until approximately 5,000-gallons has accumulated and pumping the water from the baker tank through a sprinkler system onto designated land GTI personnel will need to monitor the water discharge to insure that the treated water does not leave the site The additional time required is anticipated to be semi-weekly visits for 1