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APPENDIX K <br /> Back-up TPHg Mass Calculations - Soil <br /> Time Oil Company- Property 04-049 <br /> 14000 East Highway 88 <br /> Lockeford, California <br /> Notes and Assumptions <br /> Mass calculations are based on post-remediation soil data collected in November 2004 (Table 2) <br /> Half the detection limits (non-bold type)were used for samples reporting non-detectable concentrations of TPHg <br /> Areas were estimated based on pre-remediation concentrations detected in soil borings in the vicinity of the source areas <br /> AREA 1 TPHg <br /> Description Area of Former USTs <br /> AREA#1 Height Calculations <br /> Top Base Height <br /> feet b s feet b s feet <br /> 25 40 1 15 <br /> AREA#1 Average TPHg Concentration Calculations <br /> Sample Depth TPHg <br /> Number feet b s (mg/kg) <br /> SB-12@25 25 05 <br /> SB-12@30 30 1,300 <br /> SB-12@35 35 05 <br />�. SB-12@40 40 05 <br /> SB-13@25 25 05 <br /> SB-13@30 30 29 <br /> SB-13@35 35 13 <br /> SB-13@40 40 05 <br /> Average TPHg Concentration 16660 <br /> AREA 2 TPHg <br /> Description Area of Well MW-1 <br /> AREA#1 Heigh Calculations <br /> Top Base Height <br /> feet b s feet b s feet <br /> 40 1 75 1 35 <br /> AREA#1 Average TPHg Concentration Calculations <br /> Sample Depth TPHg <br /> Number feet b s (mg/kg) <br /> SB-14@40 40 05 <br /> SB-14@50 50 110 <br /> SB-14@65 65 05 <br /> SB-14@75 75 05 <br /> Average TPH9 Concentration 2788 <br /> i IProlects\Time Oil\Lockeford\TableslSCM&Asmt This xls\Back-up Calcs(Sod) Page 1 of 1 <br />