You've gone from arguing that there could be no possibility of chloroform in the trunk "months and months" later to last years wet bathing suit caused the elevated levels of chloroform. The lengths some people go to to avoid the reasonable and rational is amazing.
Or stop off at the store and pick up pool chemicals,,some spills and...?
And what? Cl can not break down to CHCl3. But I'm heartened to know you now accept the fact that chloroform, and in high levels, was found in that trunk.
Chloroform is used to produce fluorocarbon-22, oxybisphenoxarsine, 1,3-diisocyanate, and pharmaceuticals. Chloroform can be formed as a by-product of chlorinated water in swimming pools, tap water, cooling towers, and air stripping towers (ARB, 1990). More chloroform can be produced in drinking water during the summer than in the winter where drinking water is often dispersed and aerated, speeding the evaporation of chloroform (GCA, 1984). Chloroform may evaporate from tap water while showering with estimated concentrations ranging from 0.02 to 0.05 ppb. Chloroform is also formed by the aqueous reaction of chlorine with organic matter in the cooling water (ARB, 1990a).
Chloroform can also be produced when substances containing chlorine are added to the process waters used to bleach wood pulp. Chloroform is formed from the aqueous reaction of chlorine with organic substances in the wood pulp and then can be released to the air during the bleaching process and when effluents are released to receiving waters (ARB, 1990a).
http://scorecard.goodguide.com/chemical-profiles/html/chloroform.html