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36 API RECOMMENDED PRACTICE 1646 11.5 ATMOSPHERIC TESTING INCLUDING SAFE ATMOSPHERIC LEVELS Before any person enters either a permit-required or non-permit-required confined space,the atmosphere inside the space shall be tested by a person trained in for hazardous atmosphere conditions. 11.6 VENTILATION METHODS After initial testing of the atmosphere,the space shall be ventilated with a mechanical ventilation system designed for ventilating confined spaces.The atmosphere shall be re-tested to ensure that the supply of air from the ventilation unit has not introduced any additional hazards into the space. 11.7 ASSIGNMENT DUTIES For construction sites or existing retail petroleum/convenience sites,the individual in charge of performing the work is responsi- ble for identifying all confined space areas as well as implementing and enforcing the confined space entry program. there are three general roles and responsibilities for confined space entries—the entry supervisor,authorized entrant and attendant.These individuals shall receive special training before working in or near confined spaces.No other personnel on the site shall be in the confined space work area. 11.8 ENTRY PROCEDURES FOR CONFINED SPACES Contractors who enter confined spaces shall develop and implement the means,procedures,and practices necessary for safe con- fined space entry operations,including,but not limited to the provisions of this Safe Work Practice.Such means procedures,and practices shall: • Be in full compliance with all applicable federal,state,and local regulations. • Be written as the contractor's confined-space compliance policy. • Include as a minimum pre-entry procedures,pre-entry checklist and confined space permit execution. 11.9 RESCUE PROCEDURES FOR SINGLE OR MULTI-EMPLOYER ENTRIES Rescue procedures shall be established for each confined space entry.All necessary rescue procedures shall be developed before confined space entries may begin. Workers who have not received special training for confined space and who encounter an emergency should not attempt a rescue by themselves.This may endanger the would-be rescuer as well as reduce the likelihood of rescuing the original person.Immedi- ately seek help which should include the job superintendent or person in charge.Call 911 immediately and inform them of"man down in a confined space'and the type of space. 11.10 PERSONAL PROTECTIVE EQUIPMENT For all confined space entries greater than 5 feet in depth,full retrieval gear shall be used.Additionally,site-specific rescue proce- dures and contact numbers shall be documented and in place prior to the start of work.Full retrieval gear consists of(at a mini- mum): • tripod specifically designed and certified as a personnel retrieval device, • properly sized and fitted full body harness connected to the tripod and wom by the entrant. Refer to Section 3,Personal Protective Equipment Safe Work Practice for basic PPE requirements. 11.11 TRAINING REQUIREMENTS FOR ALL PERSONNEL INVOLVED IN CONFINED SPACE WORK Contractors working in confined spaces shall ensure workers have been trained to work in confined spaces.Training shall include but not be limited to: • Types and locations of confined spaces at the facility. • Chemical or physical hazards involved,including symptoms and consequences of exposure. • Work practices and techniques. • Atmospheric testing procedures. • Personal protective equipment,monitoring equipment,and ventilation equipment.