ASSESSMENT OF CARBON SAMPLING ARTIFACTS IN THE IMPROVE, STN/CSN, AND SEARCH NETWORKS

Summary of filter handling procedures for different long-term networks. 2-14 Table 2-3. Collocated PM 2.5 speciation data for the IMPROVE network and STN/CSN.........2-15 Table 2-4. Examples of organic carbon (OC) database differences among air quality networks 2-16 Table 2-5. Tests for diesel and levoglucosan-doping experiments. 2-17 Table 2-6. Comparison of the IMPROVE, IMPROVE_A, and STN/CSN thermal/optical carbon analysis protocols 2-18 Table 3-1. Comparison of average field blank levels (± standard deviation) among the IMPROVE, STN/CSN, and SEARCH networks for the period from 1/1/2005 through 12/31/2006 3-28 Table 3-2. Average field blank concentration by carbon fraction at the 181 sites in the IMPROVE network from 1/1/2005 to 12/31/2006 3-29 Table 3-3. Average field blank concentrations by thermal carbon fractions at the 239 sites in STN/CSN for the period from 1/1/2005 through 12/31/2006. 3-35 Table 3-4. Average field blank concentrations by carbon fractions at the eight sites in the SEARCH network for the period from 1/1/2005 through 12/31/2006 3-45 Table 3-5. Average blank concentration by PM