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Health Assessment Document for Diesel Emissions - NSCEP | US ...

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1 Pritchard (1989), utilizing data from a number of diesel exhaust exposure studies,<br />

2 examined alveolar clearance in rats as a function of cumulative exposure. The resulting analysis<br />

3 noted a significant increase in retention t 112 values at exposures above 10 mg/m 3 ·h/day and also<br />

4 showed that normal lung clearance mechanisms appeared to be compromised as the lung DPM<br />

5 burden approached 0.5 mg/g of lung.<br />

6 Morrow (1988}has proposed that the con

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