Requirements:
General

ODH Hazard Classification

All work areas at which cryogens are stored and/or used will be classified as ODH 0, ODH 1, ODH 2, ODH 3, or ODH 4, with ODH 0 being the area of lowest risk and ODH 4 being the area of highest risk. Each type of area will be clearly signed.

Approval Requirements

All work areas at which cryogen usage is proposed above the de minimis threshold set forth in the policy Scope, and any other work areas at which other non-supporting life gas usage is proposed, must obtain written approval from the Hazardous Experimental Equipment Committee (HEEC) prior to implementation (See 'ODH Area Classification and Inventory').

All use of non-personal oxygen deficiency monitors (that is, all permanent and/or statically placed monitors) must be registered with the cryogenic and ODH safety program manager. Each line organization that owns such monitors (CEF Cryogenic Operations Group, SSRL hutch managers, MFD welding managers) is responsible for stating where such monitors are located, who is responsible for calibrating the monitors, and what sort of power backup each monitor has, if any. The primary driver for collecting such information is the establishment of a site-wide master list (inventory and map) of fixed monitors for emergency response purposes. This master list is necessary for authorizing re-entries into site work areas following unanticipated utility outages and emergencies, such as the May 2005 three-day, site-wide power outage.

Hazard Mitigation

Control requirements tailored to the ODH hazard classification of the work area (see Tools-ODH Control Requirements) and any engineering controls specified by the HEEC pre-operating approval must be implemented prior to starting operations.