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• TABLE 3 <br /> COMPARISON OF METAL CONCENTRATIONS <br /> IN LEARNER SOIL SAMPLES TO REFERENCE LEVELS <br /> (mgift <br /> Learner Reference <br /> C"17Metal Soil Sample Range Soil Sample Range* <br /> Antimony ND— 61 ND—4.5 <br /> Arsenic 2.3-88 3.9- 16 <br /> Barium 100- 1,400 130—440 <br /> Beryllium ND—0.85 ND—0.83 <br /> Cadmium ND—55 ND— 1.1 <br /> Chromium 13 -2,500 22— 120 <br /> Cobalt 1.2-88 2.9-22 <br /> Copper 12—7,900 26—290 <br /> Lead 4.1 - 19,000 6.6- 160 <br /> Mercury ND— 8.8 ND—0.27 <br /> Molybdenum ND—260 0.58- 17 <br /> Nickel 11 - 1,200 12-67 <br /> • Selenium ND—3.3 ND <br /> Silver ND-32 ND <br /> Thallium ND—6.7 ND <br /> Vanadium 23 — 150 29— 130 <br /> Zinc 36-29,000 41 - 260 <br /> *Reference range is for 20 samples collected at 1'and 2'bgs by WGR in 2007 <br /> at the Port of Stockton approximately 1,200 to 3,100 feet from Learner sample locations. <br /> • <br />