PORTLAND – Phillip and Betty Tolman of Lincoln are pleased to announce the engagement of their daughter Heather Dawn to Derek Lance Chase, son of Gerald and Anne Chase of Farmingdale. Heather is the granddaughter of the late Richard and Blanche Tolman of Lincoln and the late Hartwell Phinney and L. Marie Harding of Lincoln. Heather is a 1997 graduate of Mattanawcook Academy. She earned a bachelor’s degree from St. Joseph’s College and will graduate in May with her master’s degree from the University of Southern Maine in the Family Nurse Practitioner Program. She is employed as a nurse at Maine Medical Center in Portland. Derek is the grandson of the late Linwood and Maxine Chase of Augusta and the late George and Marguerite Kearney of Houlton. Derek is a 1997 graduate of Hall-Dale High School and earned a bachelor’s degree from St. Joseph’s College. He is employed by Cintas Corporation in Westbrook. A Sept. 26, 2009, wedding is being planned in Portland.