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September 2019 AdvancedGe. o <br /> AGE Project No . 19 -4812 Environmental <br /> Page 2 of 5 <br /> 3 . 0 . ON -SITE CONTROL <br /> The Site Safety Officer will coordinate site access control and security . An exclusion <br /> zone will be established approximately 20 feet around excavation location work areas . <br /> No unauthorized person shall be allowed within this exclusion area . <br /> 4 . 0 . HAZARD EVALUATION <br /> The following substance ( s ) or hazards are known or suspected to be on site . <br /> SUBSTANCES INVOLVED : CONCENTRATIONS : <br /> Benzene Unknown <br /> Toluene Unknown <br /> Ethyl - benzene Unknown <br /> Total xylenes Unknown <br /> MTBE Unknown <br /> Total Petroleum Hydrocarbons Unknown <br /> Total Lead Unknown <br /> The additional potential hazards include : Slip -trip -fall hazards noise heavy equipment <br /> ( i . e . , drill rig ) vibration hazards traffic hazards , etc . <br /> 5 . 0 . PERSONAL PROTECTIVE EQUIPMENT <br /> Based on evaluation of potential hazards , the following levels of personal protection <br /> have been designated for the applicable work areas or task . <br /> LOCATION : JOB FUNCTION : LEVELS OF PROTECTION : <br /> Exclusion Zone Excavation Area A B C D Other <br /> Reduction Zone Preserve samples A B C D Other <br /> Support Zone Support functions A B C D Other <br /> Specific protective equipment for each level of protection used is follows : <br />