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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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AX7-128<br />

Figure AX7-2.2.3. Spatial distribution <strong>of</strong> natural and ambient surface water/sediment sites (Surface water: natural N = 430,<br />

ambient N = 3445; Sediment: natural N = 258, ambient N = 1466).

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