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Table 4 <br /> Groundwater Analytical Data-Total Petroleum Hydrocarbons and BTEX <br /> South Shore Parcels-Parcel 2A and Adjacent Areas <br /> West Weber Avenue and North Lincoln Street <br /> Stockton,California <br /> Depth Ethyl- <br /> Sample (feet, Date TPHg TPHd TPHk TPHo Benzene Toluene benzene Xylenes <br /> ID b s) Sampled (Mg/1) (mg/1) (mg/1) (Mg/1) (mg/1) (mg/1) (mg/1) (mg/1) <br /> Explanations(cont.): <br /> 46=Primarily compounds not found in typical gasoline. <br /> 47=Discrete peaks,higher boiling hydrocarbons present,atypical for diesel fuel. <br /> 48=Method reporting limit increased due to interference from gasoline-range hydrocarbons. <br /> 49=Hydrocarbons reported as TPH as Diesel do not exhibit a typical Diesel chromatographic pattern. These hydrocarbons are higher boiling than typical diesel fuel. <br /> 50=Hydrocarbons reported as TPH Gasoline do not exibit a typical Gasoline chromatographic pattern. The TPH Gasoline values are attributed to the presence of 2-ethyl-1-Hexanol <br /> which Kiff Analytical does not consider to be a typical gasoline constituent. <br /> 51=Wells destroyed in November 2008 as part of the Unocal excavation activities by Treadwell and Rollo. <br /> 52=Repeat analysis by Modified EPA Method 8015 yielded inconsistent results.The concentrations appear to vary between the bottles. <br /> Two of the three bottles were similar to each other so results from one of those two similar bottles are reported. <br /> Stantec <br /> I:\Tidewater\TW Stockton(Parcel 2A-0415)\Tables\QMR Tables\2010\3Q10\Parcel2A(Tables 4,5,6,7)Historical GW Tables 3Q10.xls Page 66 of 66 <br />