Specifications include, but are not limited to: To meet this need, PTI will require meals for an estimated minimum of 35 breakfasts, 45 lunches and 35 dinners per day for students for 48 of the 52 weeks of the year (there are no classes the week of Christmas and New Years) during the period of January 1, 2013 through June 30, 2013. The University reserves the option to renew annually for four (4) additional one-year periods based on continuing need and availability of funds. PTI courses are 12 weeks long, with one course of 56 students running at any one time. Based on past experience, approximately 95% of the students enrolled in the PTI courses return home on Saturdays and Sundays, except during winter months when road conditions prohibit such travel. Students returning home on weekends usually depart Friday evening after 4:00 pm or immediately after the dinner meal and return Sunday in the late afternoon or early evening. Typically, 20% of students are present for dinner on Friday evening and 5% are present for Saturday and Sunday meals.