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- f <br /> LI <br /> • At the instruction of the HSO, and after waiting 15 minutes for organic{ <br /> C vapors to dissipate, the SSO may use the CGI to cautiously and withl!. <br /> prudence approach the worksite to determine the extent and concentration ii <br /> Lof organic emissions. The SSO shall not enter any area where CGI ;� <br /> readings exceed the explosivity action level, nor shall the SSO or PM make ii <br /> Lany approach if there is possibility of fire or explosion. <br /> • Personnel may reenter the work area only by clearance of the HSO after ',� <br /> the cause of the emission has been determined and the source abated. <br /> CGI .readings in the work area will remain below l0% LEL for .15 <br /> continuous minutes prior to resuming activity in the area. <br /> • Prepare a W-C Accident/Incident Report and submit to,HSO. The form ,h <br /> can be found in Section 10.0. F <br /> 6.7.4 Monitoring Guidelines " <br /> Organic vapor and explosive gas monitoring will be conducted any time a team conducts <br /> intrusive activities. The SSO will be responsible for performing ambient air quality <br /> monitoring with an organic vapor detector and a combustible gas indicator approved by ''€ <br /> the HSO. Details concerning organic vapor monitors, combustible gas indicators and 'k <br /> their calibration are given in Appendix C. <br /> li <br /> Air monitoringwill <br /> be performed continuously and recorded at 15 minute intervals <br /> rr during intrusive operations. All monitoring data must be entered on the project safety I'! <br /> L' p <br /> log forms. This information will be used to determine if personal protective equipment <br /> rrrequirements should be modified. <br /> L' <br /> Because toxicity action levels are ,considerably lower than explosivity action levels, <br /> organic vapor monitoring will be-;conducted in the breathing zone of the workers closest <br /> to the source of contamination. The. worker's breathing zone is defined as a 1 foot <br /> diameter sphere surrounding the worker's head. <br /> L'{ <br /> Explosivity will be monitored with the CGI set at a location close to and downwind of 1 <br /> the source of emission. The alarm on the CGI will be set to sound at the action level. <br /> �I <br /> i <br /> 8050 Z\heal[h\8054\"hm 4 '7 - _ <br />