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Geological Teckxics Inc. Page 7 <br /> Geoprobe Investigation <br /> Project No. 425.2 <br /> September 18,2008 <br /> The detection limits for these compounds are listed below. <br /> TotalDetection Limits: Benzene Toluene yl <br /> benzene X leasM <br /> Water( ) 0.5 0.5 0.5 1.0 <br /> Detection Limits: MTBE TAME DIPE METBE TBAWater( ) 0.5 0.5 0.5 20 <br /> Detection Limits: As Fe I Cr I Cr Mn <br /> Water ( ) 1 20 1 0.5 0.2 20 <br /> A Chain of Custody will be completed for all samples collected and tracked to ensure sample <br /> integrity. <br /> 3.0 SCHEDULE & REPORTING <br /> Upon work plan approval, we will immediately proceed with budgeting/scheduling this <br /> project. The information gathered during this phase of work will be presented in a report, <br /> which will include a summary of vertical and horizontal extent of the gasoline based <br /> contaminants at the site and contaminants mass estimation. The results will subsequently be <br /> applied in the design of ORC application for residual contaminants removal on the north side <br /> of the site and under Durham Ferry Road as it is indicated in the remedial action plan dated <br /> November 29, 2007. Dr. Ray Kablanow, a registered professional geologist, will supervise <br /> the project. Copies of the report will be forwarded to the appropriate County and State <br /> regulatory agencies (SIC-EHD and CVRWQCB). <br /> Completion Data <br /> Task Description <br /> • Submit Geoprobe Site Investigation work plan September 2008 <br /> • Receive approval of plan <br /> Early Oct 2008 <br /> • Develop Budget <br /> October 2008 <br /> • Install geo-probes and collect soil and groundwater water samples Early Nov 2008 <br /> • Data Analysis and reporting November 2008 <br />