BATON ROUGE, La. (AP) — Louisiana’s social services chief resigned Monday amid heavy criticism from Gov. Bobby Jindal about her department’s response to Hurricane Gustav.The governor’s spokeswoman confirmed that Ann Williamson submitted a resignation letter.Williamson steps down only days after Jindal promised he would make “significant changes” at the Department of Social Services, a statement that led to speculation that Williamson could be fired. She didn’t immediately respond to requests for comment Monday.Jindal publicly rebuked Williamson’s agency because of problems in handing out food stamps and setting up shelters for Gustav, which struck Louisiana on Labor Day. DSS was the only state agency he’s criticized since the storm.”There were several examples where I don’t think the department’s response was adequate,” the governor said late last week.Williamson, a Jindal appointee who also served under former Gov. Kathleen Blanco, took responsibility for the problems but also said the department performed nobly in its response to the storm and the follow-up blow of Hurricane Ike. She said both problems were corrected.”We as a staff stand by our service, and we stand by the manner in which we responded to the task at hand with the resources we had,” Williamson said in a weekend interview with The Associated Press, before she resigned.Hours-long waits in the heat awaited thousands of people who sought disaster food stamp aid to help feed their families when the program started last week — and despite the waits, many went home empty-handed. Incorrect locations also were provided about application sites.DSS resolved the food stamp situation within days and has handed out aid to more than 150,000 people.However, those problems came after previous complaints about ill-equipped shelters in north Louisiana. Portable showers arrived three days after shelters opened and there weren’t enough bathrooms. The contractor who provided the showers said the company received a request from DSS the day Gustav struck.