spq_vocreadme.txt VOC data from the summer 2002 Pittsburgh Air Quality Study are contained in the space-delimited ascii file spq_voc.txt. Column names for this matrix are contained in the space-delimited ascii file spq_vocname.txt. Time (the first column) is Julian day local (Eastern) standard time. All concentrations are reported in parts per billion (ppb) molar mixing ratio. Questions can be directed to Allen Goldstein ahg@nature.berkeley.edu or Dylan Millet millet@olc.ubc.ca