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Table 4 <br /> Summary of Preprofiling Analytical Data for Metals <br /> Former Shell Central Valley Crude Oil Pipelines <br /> Tracy,San Joaquin County,California <br /> Composite Date Mercury Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead Molybdenum Nickel Selenium Silver Thallium Vanadium Zinc <br /> Sample Sampled <br /> BB-196-6P/197-IOP/199-6P/199-IOP 4/18/2006 0.014 ND ND 110 0.22 ND 7.5 4.6 6.8 ND ND 10 ND ND ND 27 21 <br /> BB-201-19P/206-19P/214-18P 4/20/2006 0.016 ND 5.4 140 0.26 ND 8.9 5.4 7.6 ND ND 12 ND ND ND 29 20 <br /> BB-207-19P/208-6P/208-IOP/214-6P 4/20/2006 0.02 ND ND 51 0.18 ND ND 4 5.2 ND ND 10 ND ND ND 16 12 <br /> B-214-12P/216-6P/216-8P/216-11.5P 4/20/2006 ND ND ND 170 0.28 ND 8.4 4.8 8.2 ND ND 13 ND ND ND 27 19 <br /> BB-204-12P/206-9P/207-6P/207-12P 4/19/2006 0.018 ND ND 120 0.3 ND 14 4.8 13 ND ND 13 ND ND ND 29 24 <br /> BB-201-6P/201-12P/204-6P/204-IOP 4/19/2006 0.019 ND ND 95 0.25 ND 18 4.6 1 17 1 5.7 1.7 11 ND ND ND 27 25 <br /> Notes: <br /> 1. All results in microgram/liter(ug/L) <br /> 2. All results by method 6010B <br /> Page 1 of 1 <br />