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51 , <br /> Table 1. Dissolved Oxygen Readings in Groundwater <br /> Monitoring Wells Prior to Sparge System Startup, <br /> Data Collected on March 31, 1995, <br /> ARCO Facility 2133, Stockton, California <br /> Well Dissolved <br /> number oxygen(m 1) <br /> E-2 1.4 <br /> E-3 0.8 <br /> E-4 1.45 <br /> E-5 1.5 <br /> E-6 (a) <br /> E-7 (b) <br /> E-8 (b) <br /> E-9 0.5 <br /> E-10 1.85 <br /> E-11 1.8 <br /> E-12 3 <br /> BHD-1 0.6 <br /> BHD-2 1.5 <br /> PR-1 1.85 <br /> PR-2 3.3 <br /> MW-1 2 <br /> MW-2 (b) <br /> MW-3 0.5 <br /> MW-4 1.35 <br /> MW-5 1.5 <br /> (a)Well is connected to vapor extraction system. <br /> (b)Not measured. <br />