We carpooled on that job which for us was normal. We were stopped at the gate but did not ever go into local businesses there in Vallejo, Ca. I saw submarines there being refueled. The Navy classified Mare Island so even though we did not have an understanding of refuelling, we saw facilities. But our work was our mission so it was not being there to understand the way they got refueled. Then we drove piling inside a building that after we finished, a heavy duty concrete floor was poured. The navy there and workers never discussed this with me.