HP d530 Small Form Factor Reference Manual page 71

Electrostatic Discharge
Use heel straps, toes straps, or bootstraps at standing workstations. Wear the
straps on both feet when standing on conductive floors or dissipating floor mats.
Use conductive field service tools.
Use a portable field service kit with a folding static-disipating work mat.
If you do not have any of the suggested equipment for proper grounding, contact an
HP authorized dealer, reseller, or service provider.
For more information on static electricity, contact an HP authorized dealer, reseller,
or service provider.
F-2 Hardware Reference Guide