Have you tested your floors lately for Static Control properties? You can measure the performance of your ESD Control floor by performing a resistance "point to point" resistance (RTT) or a "resistance to ground" (RTG) test. Most companies use the RTT test requiring a Surface Resistance Test Kit with (2ea) 5 lb. electrodes. Place the electrodes 18 inches apart on the floor. Referring to the ANSI/ESD S20.20, the resistance readings should be <1x109 ohms.
Per ANSI/ESD S20.20 Table 1 Technical Requirements Protected Flooring (Optional Element) Recommended Range "less than 1 X 109 ohms. ANSI/ESD S7.1 paragraph 5.3.1.6 "Perform a minimum of five tests per contiguous floor surface material or a minimum of five tests per 5,000 square feet (464.5 m2) of floor material, whichever is greater. A minimum of three of the five tests should be conducted in those areas that are subject to wear or that have chemical or water spillage or that are visibly dirty." Dirt is typically insulative and a dissipative ESD protected floor cannot fulfil its function if covered by insulative material.
Do you need the equipment to test our floors? See our 41290 Surface Resistance Test Kit