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COLORADO LEGACY LAND <br /> mg/L= Milligrams per Liter <br /> pCi/L= PicoCuries per Liter <br /> Chromium III=Trivalent Chromium <br /> Chromium VI= Hexavalent Chromium <br /> Source: <br /> CDPHE. 2021. Regulation No.38 Stream Classification and Water Quality Standards,Clear Creek Basin,Segment 17b. Mainstem of Ralston Creek Including all Tributaries and Wetlands from the Source to the Inlet of Arvada Reservoir. December. <br /> PAGE 10 OF 17 <br />