A laboratory receives a sample of groundwater that is contaminated with TCE. The water sample was collected in a 1 L bottle, but only 600 mL of water was collected. The bottle was stored at 25 oC for several weeks before the water was analyzed for TCE. The water analyzed has a concentration of 10 ug/L. Use the Henrys Law constant for TCE from the teaching notes. (a) What was the original concentration of TCE in the water sample collected if the water is freshwater (i.e., low total dissolved solids)? (b) What was the original concentration of TCE in the water in the water if the water is a brine with a total salt content of 1.2 M?

2. [20 points] A laboratory receives a sample of groundwater that is contaminated with TCE. The water sample was collected in a 1 L bottle, but only 600 mL of water was collected. The bottle was stored at 25 C for several weeks before the water was analyzed for TCE. The water analyzed has a concentration of 10 ug/L. Use the Henry's Law constant for TCE from the teaching notes. (a) What was the original concentration of TCE in the water sample collected if the water is freshwater (i.e., low total dissolved solids)? (b) What was the original concentration of TCE in the water in the water if the water is a brine with a total salt content of 1.2 M? a a