housands of precipitation samples are
collected each year by the National Atmospheric Deposition Program/National
Trends Network (NADP/NTN), the nation's
acid rain monitoring network. A network of
this size and importance requires careful, accurate laboratory analyses. Since the network's beginning in 1978, it has relied on its Central Analytical Laboratory (CAL) at the Illinois State Water Survey to fulfill its need for high-quality analyses and data.
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