Standard Operating Procedure for Washing Produce with a ...- dung dịch axit peroxyacetic paa sanitizer ,ingredients hydrogen peroxide and peracetic acid (PAA, also called peroxyacetic acid). Acceptable PAA concentrations for sanitizing solutions are 24-85 parts per million (ppm) of PAA, depending on the product being washed. The general recommendation is a 60 parts per million (ppm) solution of PAA for washing produce using submersion systems.