I was stationed here (Johnston Island) when they were a destruction depot for Orange, Nerve gas and tear gas. Time frame 73-74. The first thing you were issued off the plane was a gas mask. I went here when my orders to Nam were redlined. The Orange was stored in leaky 50 gallon barrels on the far end of the island. I don't have any idea how many hundreds of barrels were in that storage area. The good news is as this website shows, it is a bird sanctuary now. http://home.earthlink.net/~markinthepacific/index.html
It was a year of quiet time I apparently needed to make transition into adult hood. I turned 21 there. I would have been working Crypto maintenance at a comm center had I gone to Nam.