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0 <br /> f <br /> Pg. 2.................. ........................_...................................._..._Southland chronology <br /> f <br /> 01/26/98 Flor Daniel prepared a "Remedial Action Plan for Soil Excavation" which was <br /> approved by PHS/EHD. Groundwater extraction and soil vapor extraction could not <br /> be implemented and soil removal was the more feasible corrective action alternative. <br /> 04/30/98 Approximately 270 cubic yards of soil was removed from the source area northeast of <br /> E the formed UST area to 9 feet bgs and confirmation samples collected for analyses. <br /> 05/08/98 A MW(#16)was installed in the source area after excavation was backfill to further � <br /> evaluate the effectiveness of the corrective action performed. Soil was collected and <br /> analyzed from below the level of the excavation. <br /> 05/15/98 'MW#16 groundwater was collected and analyzed, concentration results were t <br /> reported as 13,000 ppb TPH-gas and 730 ppb Benzene. <br /> 10/15/98 MW#16 sampled; 1,500 ppb TPH- as 18 ppb Benzene MTBE < 5 ppb. <br /> 03/17/99 MW#16 sampled; 470 ppb TPH-gas, 13 ppb Benzene, MTBE < 5 ppb. <br /> C <br /> 04/14/99 PHS/EHD received "First Quarter 1999 Past-Remediation Monitoring and Sampling <br /> Report/Request for Closure" report prepared by the IT Group. <br /> 07/23/99 PHS/EHD prepared site for CVRWQCB closure concurrence. <br /> i <br /> R <br /> j <br /> s <br />