Effects on Henry's coefficient due to initial compound concentration, co-occurrence with other VOCs, or interference caused by groundwater matrix were not observed. Precise method reproducibility was demonstrated by the replicate experiments. Data was subsequently pooled to develop a linear relationship for Henry's coefficient as a function of temperature for each compound. The modified bottle point equilibrium procedure was used to determine Henry's coefficient for 23 compounds. Linear relationships for Henry's coefficients as a function of temperature were then developed for each compound.