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TABLE 2 GEQn/rra►'rRI x GROUNDWATER ANALYTICAL RESULTS' MAY 1991 THROUGH FEBRUARY 1995 540 North Aurora/969 East Fremont Streets Stockton, California Anaiyd " :Re.Wts', (,ugf h E_ocation' flats Ben erre Toluene"" Ethylizenzette Xylenes . TPl-f-G` TPH-Ds MW1 05/07/91 0.85 1.5 1.0 2.9 41 <50 06/21/91 <0.30 <0.30 <0.30 <0.30 <30 <50 08/22/91 0.41 <0.30 <0.30 <0.30 <30 <50 02/18/92 <0.50 <0.50 <0.50 <0.50 120 <50 06/16/92 <0.50 0.6 <0.50 0.9 160 <50 04/01/93 T <0.50 <0.50 <0.50 <0.50 150 <50 08/23/93 <0.50 <0.50 <0.50 <0.50 55 100 08/29/94 <0.50 <0.50 <0.50 <0.50 <50 <50 02/06/95 <0.50 <0.50 <0.50 <0.50 <50 516 MW2 05/07/91 0.77 <0.30 <0.30 0.36 31 84 06/21/91 <0.30 <0.30 <0.30 <0.30 <30 68 08/22/91 0.63 <0.30 <0.30 <0.30 <30 <50 02/18/92 <0.50 <0.50 <0.50 <0.50 <50 <50 ♦ 06/16/92 <0.50 <0.50 <0.50 <0.50 <50 <50 04/01/93 <0.50 <0.50 <0.50 <0.50 <50 <50 08/23/93 <0.50 <0.50 <0.50 <0.50 <50 67 08/29/94 <0.50 <0.50 <0.50 <0.50 <50 <50 02/06/95 <0.50 <0.50 <0.50 <0.50 <50 <50 MW3 05/07/91 <0.30 <0.30 <0.30 <0.03 <30 <50 06/21/91 <0.30 <0.30 <0.30 <0.30 <30 <50 08/22/91 <0.30 <0.30 <0.30 <0.30 <30 <50 02/18/92 <0.50 <0.50 <0.50 <0.50 <50 <50 06/16/92 NS' NS NS NS NS NS 04/01/93 <0.50 <0.50 <0.50 <0.50 <50 <50 08/23/93 <0.50 <0.50 <0.50 <0.50 <50 <50 08/29/94 <0.50 <0.50 <0.50 <0.50 <50 <50 02/06/95 <0.50 <0.50 <0.50 <0.50 <50 <50 ' Previous analytical results from the Canonie Environmental 28 February 1995"Groundwater Monitoring and Sampling at Chevron USA Production Company, 540 North Aurora Street, Stockton, California" draft letter report. pg/f = micrograms per liter (also known as parts per billion). ' Monitoring well locations are shown on Figure 2. ' TPH-G = total petroleum hydrocarbons as gasoline. .5 TPH-D = total petroleum hydrocarbons as diesel. The laboratory indicated that the chromatogram for this sample did not match the diesel standard. ' NS = not sampled.