| evaluation of surface sampling techniques for collection of bacillus spores on common drinking water pipe materials. | drinking water utilities may face biological contamination of the distribution system from a natural incident or deliberate contamination. determining the extent of contamination or the efficacy of decontamination is a challenge, because it may require sampling of the wetted surfaces of distribution infrastructure. this study evaluated two sampling techniques that utilities might use to sample exhumed pipe sections. polyvinyl chloride (pvc), cement-lined ductile iron, and ductile iron pipe coupo ... | 2010 | 20082033 |