PERIPHERAL HAZARDS

The Group C Lab is home to a legacy liquid- and gaseous-nitrogen system fed by two 160L dewars  and one k-bottle of carbon dioxide stored outside the building. Gas to the Lab is locked out administratively at the dewars, so introduction of gas to the Lab requires a deliberate act. The Lab is constantly monitored by an Oxigraf oxygen deficiency analyzer which alarms locally with horns and strobes when ambient oxygen concentration falls below 19.5%. (Health effects appear at <17% [O2].) EVACUATE B084 IN THE EVENT OF AN ALARM and notify Security at ext.-2551. 

The Lab is also host to a chemical storage cabinet and a machine shop. The shop may only be used by listed (certified) personnel. The chemical hazards are addressed by SLAC-NAL's HazCom program.