EMSL Analytical, Inc. provides laboratory services at a large construction project in the southwestern United States. Work performed over the past three years includes PLM, PCM and TEM analyses on hundreds of samples for varying turnaround times. EMSL has also assisted with method development, method validation and technical consulting support. This analysis predominantly focused on Naturally Occurring Asbestos (NOA), Amphibole mineral speciation and the presence of Erionite.