Stealth - The NCEES Exams are way easier than the PE, in my opinion. Don't trust the people who make a profit if you have to retake the exam. Also, you need some good wastewater and environmental references. Did you bring a dictionary with you last time? I put in about 350 hours of practice problems. I did the Six-minute Solutions for water resources twice, the NCEES book twice and then did some practice exams. I went through everyproblem and made sure I knew everything about it before I would move on to the next. I had a stack of references that came up to my hip. Each book was tabbed with a subject and page number on the tab and I created an index that told me where everything was, in which book, on what page, etc.... If I had to go to reference tables I included that information in my index so if I looked up sluice gate it told me that it was in my fluids book on pg 253 and that I was going to need the density of water at elevation which could be found in the Typical Props of Water Table which is in my Water Treatment book in Appendix A-58 (I just made that example up). I know that saved me a bunch of time.