5.3. moDIFy or rePlace looSe lINKage taNK leVel FloatS
Companies with tanks that may contain ignitable vapor-air mixtures and that are equipped
with conductive loose linkage level floats should take one or more of the following measures:
• Use an appropriate gas to inert tank head spaces.
• Inspect and replace, as appropriate, floats with level measuring devices that will not
promote sparks inside the tank.
• Modify floats so that they are properly bonded and grounded (see Figure 6).20
• Reduce the liquid flow (pumping) velocity.
21
• Remove any slack in the tape connected to the float mechanism that could allow a spark
gap to form.