ARCHIVED REPORTS_FOURTH QUARTER 2006 GROUNDWATER MONITORING AND SAMPLING REPORT AND ANNUAL SUMMARY REPORT

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TABLE 2 GROUNDWATER ANALYTICAL RESULTS-TPHd,TPHg,and BTEX VERNALIS PUMP STATION Vernalis,California Concentrations reported in micrograms per liter(µg/L)unless noted Date Ethyl- Total Sample ID Collected TPHd TPHdsg TPHg TPHmo Benzene Toluene benzene Xylenes MTBE MW-1 7/28/98' NS NS NS NS NS NS NS NS NS 11/05/98' NS NS NS NS NS NS NS NS NS 05/21/02' NS NS NS NS NS NS NS NS NS 07/19/05' NS NS NS NS NS NS NS NS NS 10/18/05' NS NS NS NS NS NS NS NS NS 01/25/06' NS NS NS NS NS NS NS NS NS 05/04/06' NS NS NS NS NS NS NS NS NS 08/10/06' NS NS NS NS NS NS NS NS NS 11/07/06' NS NS NS NS NS NS NS NS NS MW-2 07/28/98 230 NA <100 <50 <0.3 <0.3 <0.5 <0.6 <10 11/05/98 <50 NA NA NA NA NA NA NA NA 05/21/02 97 <50 <50 NA <0.5 <0.5 <0.5 <0.5 NA 05/22/02D <50 <50 <50 NA <0.5 <0.5 <0.5 <0.5 NA 07/19/05 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 10/18/05 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 01/25/06 1202 67 3,4 <50 NA <0.5 <0.5 <0.5 <1.5 NA 05/04/06*5 NS NS NS NS NS NS NS NS NS 08/10/065 NS NS NS NS NS NS NS NS NS 11/07/065 NS NS NS NS NS NS NS NS NS MW-3 07/28/98 53 <50 <100 <50 <0.3 <0.3 <0.5 <0.6 <10 11/05/98 <50 NA NA NA NA NA NA NA NA 05/21/02 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 07/19/05 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 10/18/05 <73 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 10/18/05D <73 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 01/25/06 9306 9504,1 <50 NA <0.5 <0.5 <0.5 <1.5 NA 05/04/06*5 NS NS NS NS NS NS NS NS NS 08/10/065 NS NS NS NS NS NS NS NS NS 11/07/06 <50 NA <50 NA <0.5 <0.5 <0.5 <1.5 NA MW-4 07/28/98 150 <50 <100 <50 <0.3 <0.3 <0.5 <0.6 <10 11/05/98 <50 NA NA NA NA NA NA NA NA 05/21/02 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 07/19/05 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 10/18/05 <50 NA <50 NA <0.5 <0.5 <0.5 <0.5 NA 01/25/06 2902 150 2,3,4 <50 NA <0.5 <0.5 <0.5 <1.5 NA 05/04/06*5 NS NS NS NS NS NS NS NS NS 08/10/065 NS NS NS NS NS NS NS NS NS 11/07/065 NS NS NS NS NS NS NS NS NS