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CAMBRIA <br /> Appendix G Geometric Mean-Groundwater Analytical Data-BP Oil Site No 11193, <br /> 3202 West Hammer Lane,Stockton,California <br /> Sample Date Screen Interval TPf1g MTBE <br /> ID Sampled (feet bgs) (µ};II) (Vg/1) <br /> VW-1 7/14/00 7-17 3 400 250,000 <br /> MW-1R 7/14/00 10-30 2 700 79,000 <br /> MW-2R 7/14/00 10-30 2,100 31,000 <br /> MW-3 7/14/00 185-31 1,600 22,000 <br /> MW-4 7/14100 15-35 25 37 <br /> MW-5 7/14100 14-32 140 360 <br /> MW-6 7/14100 13-31 25 110 <br /> MW-7 7114/00 12 5-29 5 25 85 <br /> MW-8 7114/00 33-48 55 230 <br /> MW-9 7/14/00 10-30 25 84 <br /> MW-10 7/14/00 10-30 25 025 <br /> Geometric Mean: 0-50, 160 420 <br /> Abbreviations and Notes <br /> TPHg=Total Petroleum Hydrocarbons as gasoline <br /> MTBE=Methyl tert-butyl ether <br /> bgs=feet below ground surface <br /> µg/I=micrograms per liter <br /> Geometric mean calculated using reported concentrations and 112 of reporting <br /> lima for analyses below method detection lirmt <br /> H\Hnush Petrole=A11193 Si�laosilWeil IlmtellaaoLLll i 193 ValUTAL xls 1 GW I xI Page 1 of l <br />