Sector sampling for volatile organic compounds (VOCs) employs an integrated sampling scheme coupled to a wind direction sensor. Whole air is collected at a constant rate into one of two canisters depending upon wind direction. For this set of experiments, the IN and OUT sectors were 90 and 270 degrees, respectively, with the IN sector centered on the VOCs source. Two sampling sites were used, the first about 2 miles north by northeast of a group of industrial facilities, and the second was located about 1 mile south by southeast of the same sources. Sites were operated concurrently with one sampler each; a third sampler was rotated between the sites to obtain duplicate samples. The resultant data comparisons between IN and OUT concurrent samples show good correlations to expected VOCs emissions as determined by grab samples with the target area.