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Contract No. 53U495 Task Order No 10-365101-01 Page 4 C. Conduct the Site investigation The contractor shall implement the approved workplan at the worksite The contractor is responsible for making arrangements for providing all labor, equipment and materials necessary to perform the required drilling, augering, trenching, sampling and laboratory analysis elements Sample analysis for organics shall be performed by a state certified laboratory The contractor shall ensure that the laboratory follows the QA/QC protocols as required by Contract 535515 The following anlytical methods are to be used to analyze the samples for the contaminants of concern EPA 8015 modified for gasoline EPA 8020 for BTX& E EPA 8010 for Halo Hydrocarbons EPA 418 1 for oil and grease EPA 8080 FOR PBCs Conditions found during the field sampling and analysis may dictate a change in the investigation level and increase or decrease the quantity and Iocations of sampling Field work will be conducted within the limits of an operating maintenance station and work will have to be conducted accordingly Work locations within the heavy use areas of maintenance crews may require restoration work to occur on an on-going basis to insure minimal interruption to use of the facilities D Reporting of Investigation Work The contractor shall report all work done in accordance with the provisions for Site Investigation Reports and Remedial Action Options of Contract 53S515 The remedial action option for this report shall be as described on page 13 and 14 of contract 535515 III ESTIMATED COST OF WORK The estimated cost of this TO is developed for accounting and budget purposesonly The contractor will only be paid for items and quantities actually performed Additional work or changes in an item or quanitity must be preapproved by the contract manager