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Background <br /> Phase 1 MS4 Permit issued .November, 1994 <br /> Covers discharges to the Willamette River, <br /> <br /> Amazon Creek, and the McKenzie River <br /> . Willamette water quality limited for arsenic, mercury, <br /> and temperature <br /> . Amazon is listed for arsenic, E. coli bacteria, and lead <br /> . McKenzie is listed for temperature <br /> . No TMDLs have been finalized for these water bodies <br /> <br />