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Treadwell&Rollo <br /> A LANHAN COMPANY <br /> Request for Low-Threat Case Closure 6 June 2013 <br /> RWQCB case#391149 and#391162 Page 16 <br /> 420 and 423 N Madison Street <br /> Stockton,Califomia <br /> Project.,731589001 <br /> Enclosures: Table 1 TPH Mass Remaining in Soil- 420 N Madison <br /> Table 2 TPH Mass Remaining in Soil- 423 N Madison <br /> Figure 1 Site Location Map <br /> Figure 2 Site Plan - 420 N Madison <br /> Figure 3 Site Plan -423 NMadison <br /> Figure 4 420 N Madison Idealized Subsurface Profile, A-A' <br /> Figure 5 423 N Madison Idealized Subsurface Profile, B-B' <br /> Figure 6 TPH Concentrations Remaining in Soil —420 N Madison <br /> Figure 7 420 N Madison TPH and Gasoline Constituents in Groundwater <br /> Figure 8 UST B=6 Excavation and Areas with TPH Concentrations Remaining in Soil <br /> Figure 9 423 N Madison TPH and Gasoline Constituents in Groundwater <br /> Figure 10 Stockton Wells and Site Location <br /> Figure 11 Conceptual Site Model <br /> Attachment 1 Soil and Groundwater Data -420 N Madison <br /> Attachment 2 Soil and Groundwater Data -423 N Madison <br /> Attachment 3 Microbiological Analyses <br /> Attachment 4 Natural Attenuation Parameters, <br /> Attachment 5 Regression Analysis for Benzene <br /> Attachment 6 BioScreen Model <br />