Design and testing of the SCAQS (Southern California Air Quality Study) sampler for the scaqs study, 1987. Final report

The principal objectives of the project were the design, construction, and testing of an integrated gas and aerosol sampler in order to provide a set of nine equivalent samplers for the Southern California Air Quality Study (SCAQS). The prototype sampler showed a precision of 3 to 7%. Significant losses of ammonia and nitric acid in the original prototype sampler were reduced to less than 5% in the final design. The side-by-side evaluation showed that the coefficients of variation of the mean concentrations averaged over all samplers for each of the 20 species determined were within the overall detection limits. The final result was the delivery of nine fully tested and equivalent samplers to the California Air Resources Board.