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OPTION METUOD ADVANTAGES DISADVANTAGE ESTIMATED <br /> S COST <br /> 1 Excavation Removes the Cost, logrstres, $335,000 <br /> residual source utility rerouting, <br /> location, tenant <br /> relocation <br /> 2 Dual Phase Removes both vapor Duration estimated 6 5209,000 <br /> Extraction and groundwater, to 18 months, noise <br /> contaminants treated from equipment to <br /> with carbon n residents <br /> 3 In-situ Degradation of Place m residual $133,000 <br /> Biodegradation contaminants by areas as mapped by <br /> microbes in-situ, borings, assumed <br /> minimal site effective in 6-12 <br /> disruption and months, additional <br /> to tenants1-monituring <br /> Wright has prepared the cost suinmanes of the estimated costs for each option on the <br /> Previously referenced and appended estimates These cost estimates include at least four <br /> quarters of post cleanup groundwater monitoring Approximately $ 15,755.00 of each <br /> Options Cost is attributed to the Post Cleanup Groundwater Monitoring for (4) <br /> Additional Quarters. <br /> Limitations <br /> This report has been prepared specifically for Mr Ed's Muffler, site at 595 West Eleventh <br /> Street in Tracy, CA and was done according to the State and local agency suggested <br /> guidance documents for these investigations The interpretations, conclusions and <br /> recommendations made herein are based on professional judgment of the data and analysis <br /> for the soil and water samples collected on-site and should be reviewed in the content of <br /> this report and other site reports. Wright Environmental Services, Inc is not responsible <br /> for errors in laboratory analysis and reporting, or for information not available during the <br /> course of the study, and no warranty or guarantee is expressed or mmphed therein. <br /> Page 17 <br />