Dual Q is an effective sanitizer at 150 ppm active quat for use on hard, non-porous, food contact surfaces in 400 ppm hard water against: Escherichia coli and Staphylococcus aureus. Use as a sanitizer for all hard, non-porous surfaces not always requiring a rinse in official establishments operating under the Federal meat, poultry, shell egg grading and egg products inspection programs.