Yes, Jvalentour you are 100% correct about "no more arsenic in treated wood."
There is quiet the story behind that decision to abandon arsenic, involving murder charges, ER visits, abandon house: A readers digest version follows,,, so no worries about arsenic in hives;
A young couple in Washington builds a house. The couple wanted ALL the wood to be treated. During construction the lady gets violently sick with sudden acute abdominal pain, head aches, joint aches. The husband rushed his wife to ER with symptoms of heavy metal poisoning. In ER the doc tested the wife for arsenic and of course POSITIVE. Police were dispatched and the poor husband was arrested and charged with premeditated murder. Imagine his shock. However the husband became sick, was tested and he had more arsenic in his blood than his wife. Charges were dropped. It was determined the couple was inhaling arsenic from sawing the treated wood. They had to adbandon the new dream home.
Ya see, someone in the wood treating business in Washington state decided they could make super duper treated wood if they just added arsenic. So arsenic was approved, not one questions asked.
Blessings