ABSTRACT
Q·E·D plus™ Mixer by Chemineer, Inc. QA See “quality assurance (QA).” QC See “quality control (QC).” QL-1™ Ultraviolet disinfection system by Infilco Degremont, Inc. QLS Quick-lock sprocket by Budd Co. Q-Pac™ Random plastic media by Lantec Products, Inc. Q-Tracker™ Sewer collection flow monitor by Badger Meter, Inc. Quadra Press Plate and frame filter press by Aqua Care Systems. Quadra-Clean™ Vertical basket batch type centrifuge by Western States Machine
Co. Quadra-Kleen Sand filter backwash system by Culligan International Corp. Quadramatic III® Automatic batch type centrifuge by Western States Machine Co. Quadrant™ Thermal oxidizer by Catalytic Products International. Quadrasep Integrated wastewater treatment system by Blace Filtronics, Inc. Quadricell® Mechanical gas induction flotation separator by USFilter/Whittier. Quadrufil Gravity filter system by Vulcan Industries, Inc. quagga mussel Freshwater mollusk that can foul water intake screens and piping
by attaching itself to a solid structure, eventually restricting flow. quaking bog A wholly or partially floating bog of peat that shakes when walked
upon. qualitative The general description of a substance without specifying its exact
amount or concentration. quality assurance (QA) A definitive plan for operation that specifies the measures
used to produce products or data of known precision and bias. quality control (QC) Set of measurements within an analysis methodology to
assure that the process is in control. Quanti-Cult™ Quality control test organisms by IDEXX Laboratories, Inc. quantitative Description of a substance in exact terms. Quanti-Tray™ Water sample test kit by IDEXX Laboratories, Inc. Quantum® Floating aerator by Air-O-Lator Corp. quart A liquid and dry unit of measure equal to a quarter of a U.S. gallon or 2 pints. quaternary ammonium A basic chemical group [N(CH3)3+] which provides the
