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Mr.Brian Taylor==-- Formatted:Right <br /> tanuary 31,2008 _ Deleted:Mr.an..Tayiory <br /> Deleted:Jmuwy 31,20081 <br /> tank and subsequently transported to Shell's Martinez Refinery located in Martinez, California for <br /> recycling. <br /> Test Data Collection:CRA will periodically measure/record the following the groundwater pumping and <br /> DPE operational and monitoring information: groundwater water pumping rate, water flow totalizer <br /> reading, applied vacuum, induced vacuum, well flow, dilution air flow,vapor concentrations, extracted <br /> groundwater.volume,and groundwater drawdown. This information will be initially collected every 15 to <br /> 30 minutes,then in longer intervals after operational data has stabilized..Vapor samples will be collected <br /> periodically in one-liter Tedlar bags to confirm field measured concentrations through laboratory analysis. <br /> A state-approved analytical laboratory will analyze all samples for TPHg,BTEX,MTBE,and TBA using <br /> EPA Method 8260. <br /> Report Preparation: Following the completion of the well installation and DPE pilot testing activities, <br /> CRA will prepare a written report,which will describe the field activities,tabulate the field data,calculate <br /> the mass of contaminants removed through DPE,and summarize the results and findings. More than one <br /> document submittal may be prepared,depending on the actual field schedule and access issues. <br /> Certification: The scope of work described in this work plan will be performed under the supervision of <br /> a California Professional Geologist or Professional Engineer. <br /> SCHEDULE <br /> CRA is prepared to begin working as soon as Shell receives written approval from RWQCB. The DPE <br /> test will be permitted/scheduled once the schedule for installation and development of the proposed <br /> monitoring wells is known. We will keep the RWQCB apprised of our status. <br /> 241799 7 <br />