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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 bgs) Sampled (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) (mg/l) <br />Explanations (cont.): <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 />53 = Discrete peaks, lower boiling hydrocarbons present, atypical for Diesel Fuel. <br />I:\Tidewater\TW Stockton (P2A)\Tables\QMR Tables\2012\1Q12\20120305-Parcel2A (Tables 4,5,6,7) Historical GW Tables 1Q12-CL.xlsx Page 67 of 67