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03 July 1997 <br /> AGE-NC Project No . 95 -0121 <br /> Page 2 of 4 <br /> (bsg) . Therefore, excavation of depths in excess of 18 feet would require a ground water <br /> pumping system to facilitate the dewatering of the excavation. The cost for rental and <br /> operation of a dewatering system for the duration of the project to be between $2,000 and <br /> 54 ,000 . <br /> • Several active businesses are presently located on the property. Excavation of impacted soil <br /> would cause a loss for these companies . The actual cost is difficult to estimate; however, <br /> based upon at least a partial loss of business operations for approximately one to two weeks, <br /> total loss to the property owner and business operators could approach $25,000 . <br /> • It is likely that the upper fifteen feet of overburden soil would not contain significant <br /> concentrations of petroleum hydrocarbon and, therefore, could be stockpiled for backfill <br /> purposes . However, excavation of depths in excess of 20 feet bsg may require " shoring" <br /> techniques at for the excavation walls to allow the backhoe/excavator to reach extended <br /> depths. This would require additional excavation of overburden soil as well as additional time. <br /> Additional costs for shoring of the excavation and stockpiling of the "clean" soil could <br /> approach 515, 000 . <br /> • Other costs included for excavation of hydrocarbon-impacted soil from the core area at the <br /> site include project coordination, permitting, laboratory analysis; regulatory liaison and report <br /> preparation. Costs for these items are estimated to be $5,000 to $ 10,000 . <br /> The following is a surmnary of estimated costs for excavation of hydrocarbon-impacted soil from the <br /> core area of the Nomellini site : <br /> TASK COQ I <br /> Excavation, treaunent/disposal and backfilling $ 555,540 to $833 ,310 <br /> Excavation dewatering $2,000 to S4.000 <br /> Business operational losses - S25,000 <br /> Additional excavation costs for shoring, stockpiling, etc. 515,000 <br /> it Oversight, Report Preparation & Laboratory Analysis $5 ,000 to $ 10,000 <br /> TOTAL : S602,540 fo $887,310 <br /> ii <br /> Adranced GcoEnviro=ental, Inc. - <br />