Initially submitted my application to BASF before my university's career fair through their online application system as well as my university's career center. Application took about 20 minutes and was fairly standard. Attended the career fair and spoke with a representative for probably about 10 minutes. I might have given them a resume, but I'm not sure. I was contacted by email probably about a month later that I had been selected for an on campus interview. The on campus interview was in the career center and consisted of two 45-minute one-on-one sessions with some middle aged engineering managers. I was contacted within two days that I had been invited for a site visit in Freeport, TX. The site visit consisted of a welcome dinner the night before, three 30-minute interviews, a plant tour, and a number of presentations. I was done with the site visit by mid-afternoon. I was contacted within about three days with an offer. Most of the interviews were a combination of behavior and background questions. "Tell me about your internships". I only had one person ask me to talk about a heat exchanger for 10 minutes.