When Samuel rebuked Saul for improperly making an offering before the Lord, he asks for both a burnt offering and a "sacrifice of well-being":
He waited seven days, the time that Samuel [had set]. But when Samuel failed to come to Gilgal, and the people began to scatter, Saul said, “Bring me the burnt offering and the sacrifice of well-being”; and he presented the burnt offering. He had just finished presenting the burnt offering when Samuel arrived; and Saul went out to meet him and welcome him. But Samuel said, “What have you done?” Saul replied, “I saw the people leaving me and scattering; you had not come at the appointed time, and the Philistines had gathered at Michmas. I thought the Philistines would march down against me at Gilgal before I had entreated the Lord, so I forced myself to present the burnt offering.” Samuel answered Saul, “You acted foolishly in not keeping the commandments that the Lord your God laid upon you! Otherwise the Lord would have established your dynasty over Israel forever. But now your dynasty will not endure. The Lord will seek out a man after His own heart, and the Lord will appoint him ruler over His people, because you did not abide by what the Lord had commanded you.”—1st Samuel 13:8-14 (NJPS)
My understanding, is that the "sacrifice of well-being" is the same as the peace offering. If so, I read this passage to mean that Saul was calling for two different offerings and would chose one if he were planning to go to war and the other if he intended to remain at peace. He chose the burnt offering and that is what Samuel rebukes him for: failing to wait on the Lord's command to go to war.
On the other hand, I can also read this passage as mentioning the sacrifice of well-being because Saul intended to make both sacrifices. But since Samuel arrived so soon after the first offering was finished, he did not have time to continue with the second ritual before being rebuked for making the first offering without Samuel present.
How should I read this passage?