Kirsten Bierwirth Olshefski, 42, of Concord, passed away Sunday, January 15, 2012, at Carolinas Medical Center - NE. A family service will be held at a later date. Kirsten was born on March 14, 1969, to Lillian Gertrude McLean Bierwirth of Spring City, PA and the late Robert Raymond Bierwirth. In addition to her mother, she is survived by four daughters, Ashleigh Samuel, Gabrielle Lee Samuel and Hope Lynn Olshefski of Honey Brook, PA and Nicole Lynn Samuel of Philadelphia, PA; and two sons, Tyler Olshefski and Joshua Thomas Olshefski of Honey Brook, PA. Memorials may be made to Hartsell Funeral Home c/o Kirsten Olshefski’s account, P.O. Box 367, Concord, NC 28026. Hartsell Funeral Home of Concord is serving the Olshefski family.