THIS PRODUCT WAS DESIGNED, PRODUCED AND VERIFIED FOR ACCURACY AND STABILITY under a Cooperative Research and Development Agreement between RT Corp (USA & UK), RIZA Institute for Inland Water Management and Waste Water Treatment and CN Schmidt. The Reference Values were determined by GC-MS, ECD (USEPA 8270 and Dutch standard methods NEN 5771, 5718 and 5719). Particle Size Distribution: 200 micron to 1 mm pH 6.54