What the Numbers Mean?

The presence of adenosine triphosphate (ATP) on a surface indicates the presence of contamination — food residue, allergens, and/or bacteria — implying a potential for the surface to harbor and support bacterial growth.

ATP

Therefore, low ATP levels are desirable. The manufacturer of the meter used in this study notes that ATP levels of 0-30 are acceptable on food preparation surfaces and levels below 100 are considered “clean.”

A luminometer measures the reflective index of light. On a scale of 1 to 100, 1 is the lowest possible gloss and 100 is the highest. With the floors in this test, the concrete surfaces were not polished or finished and, therefore, a less glossy or matte surface is desirable because grease and syrup residues are shinier than a clean floor.

Slip resistance: On a scale of 0 to 1, 0 is the most slippery floor and 1 is the least slippery.

Therefore, higher slip resistance or static coefficient of friction ratings are desirable to ensure slip, trip and fall incidents are minimized.

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