DOE/Pacific Northwest National Laboratory (PNNL). The Laboratory conducted preliminary research of the Liquid Sampler’s product claims and looked at the intent of RCRA methods (40CFR260) and SW-846 to determine if PARRC (Precision, Accuracy, Representativeness, Repeatability, Completeness) parameters were met. The staff examined relative legislation and present methodologies, as well as conducting limited data gathering. The Liquid Sampler was compared to the COLIWASA and Drum Thief and found to be superior in all categories tested. Of special significance was the enhanced OSHA, ALARA and technology improvement of the Liquid Sampler.