The active ingredient of Jasco Green Termin 8 is not CCA, and I don't think it contains any arsenic. Instead, its active ingredient (25%) is copper napthanate, which gives it the deep green color. It is the strongest wood preservative available that can be applied by anyone without requiring a special license to do so.
A few years ago, I was Project Manager on a timber bridge rehabilitation contract where we applied close to 500 gallons of a similar copper napthanate product (Perm-e-8), first spraying and then back-rolling it after properly diluting it with stoddard solvent. The strong smell and color tend to dissipate after several weeks of weather exposure, and were completely gone in a month or so, but I'm not sure that will happen where the members are sealed inside of a home's walls. I vaguely recall the 50-gallon drums of the stuff having been marked "For Exterior Use Only." An option might be to loosely stack the treated members in the yard for a few weeks, letting them do their drying/deodorizing before using them in the bathroom.