Estimating the Flammable Mass of a Vapor CloudChapter 5.2, page 151, Equation 5.9: Put left bracket after 0.249 and right bracket after 1.041. This makes it consistent with page 246 after the corrections listed below. Appendix I Evaluating flammable mass for Gaussian dispersion models: instantaneous, point source page 243: In Equation I.9b the exp should be erf (error function instead of exponential). In Equation I.12, the first two exp should be erf, but not the ones within square brackets. In Equation I.11, the denominator term for v should be c-subscript LFL instead of c-subscript UFL Appendix J, Evaluating flammable mass for Gaussian dispersion models: continuous release, approximate method page 246, Top line, equations number is missing. Should be (J.3) Top line correction to Eq J.3: remove the <0.1 term. Second line, should be for 1/L <or = (use the symbol for this that I can't type in Email) 0 Equation J.6: subscript to f should be z2 . Equation J.6: inside brackets should have 1/L + C6 instead of 1/L - C6.