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x <br /> s <br /> Table 2 <br /> Historical Summary of Groundwater Analytical Results I <br /> UNOCAL Bulk Plant 0798 <br /> 8203 East 11th Street I <br /> Tracy,Calitomia <br /> I <br /> i <br /> Well Sample TPN Gasoline TPH Diesel Benzene Toluene Ethyibenzene Xylenes <br /> NumberDate (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> E t <br /> U-1 11/11/90 ,. 1 NO '? NO � 1 <br /> I 02/14/91 NO ND NO <br /> i <br /> U-2 11/11/90 vd ND ND NO <br /> 02/14/91 wQ NO NO <br /> U3 1,1/11/90 NO ND ND ND NO <br /> NO <br /> 02/14/91 NO NO NO ND NO NO <br /> i <br /> r WSW-1 1-,/11/90 NO NO NO ND NO NO <br /> 02/14/91 NA NA NA NA NA NA i <br /> :.Detection 50 50 0.5 0.5 0.5 0.5 <br /> �� t.imit <br /> TFH total petroleum hydrocarbons <br /> U PPb = parts per bililon <br /> NO = _not detected i <br /> = detection limit raised <br /> NA = not analyzed <br /> f <br /> c <br /> f <br /> 31 001 02/1 091 Aoril23. 1991 <br />