ARCHIVED REPORTS_XR0012721 - Laserfiche WebLink

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c LTf _ M88168D June 1990 -6 EXPOSURE MONITORING �. A PID will be in continuous use during remediation operations. The ionization constants for all of the substances likely to be encountered (benzene ^� 9.24 ev, ethylbenzene 8.76 eV, toluene 8.82 eV, and xylene t8.5he or anis re all ars within the detection range of the PID (less than 10.6 em)above background levels in the breathing zone detected by the PIA exceed 5 pp (to be measured prior to excavation and up-wind of the site) for more than live minutes, the personnel in ehe contaminated zone will don Level C equipment, including respirators. Level C equipment will be worn continuously in the contaminated zone until such time as the PID concentrations are below 5 ppm above " background. If PID concentrations measured in the breathing zone exceed 800 ppm ot above background the site area will. be evacuated immediately.pe e1 Reentry n equipment is be allowed until concentrations are below BOD PP D to avoid monitoring vehicle provided. Care should be taken in operating the PT exhaust. "'. PERSONNEL PROTECTIVE EQUIPMENT Level D equipment will be requiredabovetthe site at all tipies that the background Level D equipment PID measured concentration are below 5 pp includes: Hard hats Coveralls Rubber safety boots Safety glasses or goggles Standard work gloves If organic vapor concentrations equal or exceed 5 ppm above — background all personnel in the contamination zone (see ementr until Zone" organic vapor section) will don Level C equipment and remain in Level C equip to below 5 ppm above background. Level C equipment concentrations are reduced includes: Level D equipment plus: Half-face respirator equl.pped with combination organic vapor/dust cartridges Tyvek suits Neoprene or nitrile gloves (with latex liner gloves)