Notice of Heritage Impact Assessment for alterations and additions to existing structures located at the National Health Laboratory Services Campus - 1 Modderfontein Road, RE/70/61-IR of the farm Rietfontein, in terms of the regulations pertaining to Section 38 of the National Heritage Resources Act, 1999. The National Health Laboratory Services intends to perform alteration and additions to existing structures located on its campus at 1 Modderfontein Road, RE/70/61-IR of the farm Rietfontein. Any interested or affected party who wishes to view the proposal or comment is invited to contact the Heritage Consultants, Mayat Hart Architects (email brendan@mayathart or 082 376 7884), copying Tebogo Molokomo (Tebogo.Molokomo@gauteng.gov.za) at the Provincial Heritage Resource Authority Gauteng. The closing date for comments is 28 July 2015.