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Site Health and Safety Plan <br />19133 East Liberty Road, Clements, California <br />August 16, 2022 (Revised June 27, 2023) <br />Page 23 <br /> <br />Sharp Environmental Technologies, Inc. <br />zones and/or require a person to wear a respirator even though atmospheric air contaminant <br />concentrations are below established SHSP action levels. <br />For sites containing petroleum hydrocarbons such as gasoline and related compounds, and/or certain <br />chlorinated hydrocarbons such as tetrachloroethylene and/or trichloroethylene, monitoring can be <br />accomplished using a PID with a 10.6 electron-volt lamp or equivalent calibrated to isobutylene. <br />Monitoring for the aforementioned gases and vapors should be done at the source of emission as well <br />as in the breathing zone of site personnel believed to represent the highest risk of exposure. The PID <br />will be checked with a calibration gas standard (hexane or isobutylene) prior to each day’s activities <br />and at any other time when the instrument response is questionable. The instrument check procedure <br />will be recorded in a logbook and initialed by the person performing the procedure. Other methods of <br />air sampling using colorimetric detector tubes, and/or sampling pumps with charcoal tubes may also <br />be used at the direction of the SHSS or if required by this SHSP. If benzene levels could exceed 1 part <br />per million (ppm) for extended periods of time, colorimetric detector tubes specific for benzene will be <br />required. For certain chlorinated compounds (i.e. methyl chloroform), an 11.7 electron-volt lamp <br />should be used in the PID. Consult the NIOSH pocket guide to chemical hazards for information on <br />ionization potentials before selecting the appropriate electron-volt lamp. <br />For sites containing flammable or explosive gases and/or vapors (i.e. methane gas), and/or hydrogen <br />sulfide and/or carbon monoxide, and/or oxygen deficiency atmospheres, monitoring will be <br />accomplished using a four-gas direct reading instrument calibrated for methane, hydrogen sulfide, <br />carbon monoxide and oxygen. Monitoring for the aforementioned gases and atmospheres should be <br />done at the source as well as in the breathing zone of site personnel believed to represent the highest <br />risk of exposure. The four-gas meter will be checked with a calibration gas standard prior to each day’s <br />activities and at any other time when the instrument response is questionable. The aforementioned <br />instrument check procedure will be recorded in a logbook and initialed by the person performing the <br />procedure. <br />For sites containing elevated concentrations of airborne dust that could exceed the applicable PEL, a <br />real-time aerosol monitor will be used. Monitoring for the aforementioned dusts and atmospheres <br />should be done in the breathing zone of site personnel believed to represent the highest risk of <br />exposure. The instrument will be checked prior to each day’s activities according to the manufacturer’s <br />recommendations and procedures and at any other time when the instrument response is questionable. <br />The aforementioned instrument check procedure will be recorded in a logbook and initialed by the <br />person performing the procedure. <br />All monitoring instruments will be operated and maintained pursuant to the manufacturers written <br />procedures. Instruments that exhibit an inappropriate field response or provide questionable results <br />will not be used and sent out for servicing.