The first Quality Assurance Report for the Central Analytical Laboratory (CAL)(1) of the National Atmospheric Deposition Program (NADP) was published in 1980. It detailed the beginnings and goals of the quality assessment ...

In August 1991, the Central Analytical Laboratory (CAL) of the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) received and analyzed its 100,000th wet deposition sample. Analysis of precipitation ...

The National Atmospheric Deposition Program/National Trends Network (NADP/NTN), a cooperative effort between state agricultural experiment stations, federal and state agencies, public and private universities, and industry, ...

Since its inception in 1978, the Central Analytical Laboratory (CAL) of NADP/NTN has operated with a strong emphasis on quality control (QC) and quality assurance (QA). The very low concentrations of dissolved chemical ...

The National Atmospheric Deposition Program (NADP) was initiated in 1977 under the leadership of the State Agricultural Experiment Stations (SAES) to address the problem of atmospheric deposition and its effects on ...