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TABLE 5-SUMMARY OF DETECTED METALS IN GROUNDWATER <br /> Metalsa Structural Products,Inc.—1550 Industrial Drive,Stockton,California <br /> Sample ID Sample Date arsenic Chromium Copper Mercury Nickel Selenium <br /> (fig/L) L <br /> GP-1 7/12/10 16J 3.5J 3.5J 0.049B,J 4.7J 13J <br /> GP-2 7/12/10 21 15 3.7J 0.079B.J 5.4 13J <br /> RSL 0.052 22.000 800 0.63 390 100 <br /> Cal-Mod RSL 0.00710 - - - - - <br /> Notes: Values in bold exceed a screening level <br /> B method blank contamination <br /> J estimated concentration below the reporting limit <br /> gg/L micrograms per liter <br /> RSL Regional Screening Level,Tapwater(EPA,May 2014) <br /> Cal-Mod RSL California-Modified Regional Screening Level,Tapwater(DTSC,May 2013) <br /> 1163-3 2014 0617 PEAWP 3 GRI <br />