Original = http://webbook.me.go.kr/DLi-File/NIER/06/016/163062.pdf
Written by National Institute of Environmental Research (RoK)
Title = Final report - Research on damage types of chemical terror attack and possible countermeasures
Table 3-6 = Possible casualty under different conditions for nerve agent GB attack 1
Table 3-7 = Possible casualty under different conditions for nerve agent GB attack 2
Sarin gas is a nasty one.
Table 3-8 = Possible casualty under different conditions for nerve agent TGD/VX attack
Table 3-9 = Possible casualty under different conditions for blister agent HD attack
Table 3-10 = Comparison of casualty potential for different weapons
All NBC agents requires less amount to make the same casualty when compared to artillery. Bio attack would be really nasty.
Table 3-11 = Weather effect on chemical terror attack / accident
If AB introduce chemical, it would be great to depict the effect of wind / temperature / humidity and terrain characteristic (tile's relief or cover value, maybe?)
All of those were based on possible KPA SF's or artillery's chemical attack attempt on civilians and city structures. I guess those should be a good reference for the depiction of chemical attack on battlefield for all-out war situation for AB.
I don't have time to translate them all, but you could be able to use some OCR software to recognize Korean and translate them to English. If you have specific questions, let me know, I will translate them later for that part.