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ISI <br /> Geological rechiics 19co <br /> 1101 7`h Street <br /> Modesto,California 95354 <br /> (209)522-4119 1 Fax(209)522-4227 <br /> ' Revised Remedial Action Report <br /> ' Mass Estimate Recalculations <br /> Sinclair Trucking <br /> ' 3780 West Linne Road <br /> Tracy, California <br /> ' Project No. 1030.2 <br /> November 1, 2005 <br /> EXECUTIVE SUMMARY <br /> Ms Duncan of the San Joaquin County Environmental Health Department (SJCEHD) <br /> directed a recalculation of the contaminant mass at the site, both before and after the <br /> remediation activities, and that all available site data be used in the calculations. <br /> 1 <br /> The following revised remedial action report addresses the mass estimate calculations. GTI <br /> ' revisited the mass estimates using all available soil analytical data. Pre, post and remaining <br /> contamination contour maps, both shallow and deep soil concentrations, were created and are <br /> included as figures in this report. Volumes were carefully computed using Autocad® and <br /> ' Surfer® software and mass estimates were calculated in Excel® spreadsheets. The tables are <br /> included in Appendix A of this report. <br /> The revised calculations indicate that as much as 4,506 pounds of TPH-G were bound to soil <br /> t prior to excavation and that approximately 1,861 pounds were removed during excavation <br /> activities. <br /> 1.0 INTRODUCTION <br /> 4.1 Site Description - <br /> The Sinclair Trucking (ST) site is located at 3780 Linne Road in Tracy, California (Figure 1). <br /> There are currently no USTs on the property. The property is a developed lot on <br /> approximately one-acre surrounded by open fields of row crops. The site has a residence, <br /> maintenance & service buildings and a parking area. Areas of the site not occupied by <br /> 1 <br />