Fig. 1. Effects of surface seal treatment ([a] water seals; [b] plastic tarps) on emission flux of 1,3-dichloropropene (1,3-D) after shank injection of Telone C35 in a field trial. Error bars are the standard error of the mean (n = 3). Dashed lines indicate uncertainty when no measurements were made. HDPE, high density polyethylene; VIF, virtually impermeable film.