Quiltek Services, Inc. This independent assessment was conducted to assist safety and health professionals recognize the pure value-added potential of this engineering control. Without question, chemical/RCRA sampling is a hazardous and represents an exposure rich environment. OSHA and ACGIH control hierarchy recommends that engineering controls are implemented far ahead of administrative and personal protective means. It is noted that the Liquid Sampler should be able to reduce workplace controls, since sample collection is is-situ and not subject to operator contact. Various OSHA citations are referenced.