The NWT Q-Chem Program was initiated in 1984 as an attempt to assist power utilities in evaluating their in-house laboratory performance. The philosophy of the program is to provide customers with standards as close to "real world" as possible. To accomplish this task, NWT has produced standards ranging from low ppb level solutions to highly concentrated solutions. In order to satisfy the need by power plants for metallic oxides on filters, NWT developed techniques to prepare filter standards. The Q-Chem program has grown to include over 50 sites around the world, covering both BWRs and PWRs. NWT has developed custom programs to address specific needs of clients, including X-Ray Fluorescence (XRF) compatible filters.