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' TABLE 3 <br /> PPE SELECTION MATRIX <br /> Pacific Bell <br />' 345 N. San Joaquin Street <br /> Stockton, Califomia <br /> IT Project No. 190916 <br /> 1 I <br /> PPE LEVEL_ CONDITIONS <br />' Level D All identified contaminant airborne concentrations below the PEL for that contaminant. <br /> • Oxygen concentration less than 25% and greater than 20%. <br /> • c 5 ppm VOC above background as determined by PID. <br />' No significant splash or skin contact potential. <br /> Level C Any contaminant airbome concentration above the PEL but below 10 times the PEL for <br />' that contaminant. <br /> • Oxygen concentration less than 251/6 and greater than 20%. <br /> • c 50 ppm VOC above background as determined by PID. <br />' All confined space entry with contaminant airbome concentrations below 2 times the <br /> PEL. <br /> • Low splash or skin contact potential. <br /> Level B Contact the Health and Safety Department. <br /> Level A Contact the Health and Safety Department. <br /> rtment. <br /> Stop Work • Oxygen content more than 251/6 or less than 206/6 <br /> • 50 ppm VOC above background as determined by PID. <br />' Level B protection must be approved by the project Health and Safety Manager. Level A protection must be <br /> approved by a CIH, the IT Corp. EES Divisional Manager or Health and Safety and the IT Corporate Director <br /> of Health and Safety. <br /> PEL = permissible exposure limit. <br />' VOC = volatile organic compounds. <br /> PID = photoionization detector. <br /> ppm W parts per million by volume. <br />' % = percentage by volume. <br /> c = less than. <br /> Z/05-09-9WST/94-0064.T3 <br />