work plan for soil remediation, sampling and analysis plan, site ...

OHM RemediationServices Corp. HEALTH AND SAFETY PLANpresent at the site, monitoring will be performed to detect the presence of pesticide carriersolvents which may be present in contaminated soils.For known contaminants only, to determine a protection level from PID data, the SSO willmultiply the TLV of the known compound by 25. This will be the limit for Level C protectionfor that compound. If PID readings exceed 25 times the TLV, Level B protection will berequired. Also, regardless of the TLV, a PID reading of 1,000 ppm or more will indicate thatthe GMC-H cartridges may become overloaded and will necessitate Level B protection. (Note:PID readings do not always indicate the actual air concentration of a compound. Consult themanual, HNU, or the CM for clarification.)The SSO will take measurements before operations begin in an area to determine the amount oforganic compounds naturally occurring in the air. This is referred to as a background level.Levels of volatile organic compounds will be measured in the air at active work sites onceevery hour and at the support zone once every hour when levels are detected above backgroundin the exclusion zone. If levels exceed background at any time in the support zone,work in the exclusion zone will cease and corrective actions will be taken, e.g., cover soil withpolyethylene sheeting. Work will not resume until levels reach background in the supportzone.7.3 BENZENE DETECTOR TUBE MONITORINGBenzene detector tubes with Drager pump will be used to monitor personnel breathing zonewhen the PID/OVA action level of 10 ppm for 10 seconds is exceeded, requiring Level Cprotection. Should benzene detector tube results exceed 25 ppm, the operations will be shutdown and vapors will be allowed to ventilate to less than 25 ppm before operations resume.Benzene detector tubes (Drager benzene tube 0.5 a 67-28561), with a measurement range of0.5 to 10 ppm benzene, will be used in conjunction with Drager pump at pump strokes from40 to 2. Benzene detector tubes will be pulled four times daily in personnel breathing zone todetermine personnel exposure when 10 ppm PID/OVA readings are obtained.7.4 REAL-TIME AEROSOL MONITOR (MINIRAM)A real-time aerosol monitor (miniram) will be used to measure airborne particulate in personnelbreathing zones and site work area locations. A breathing zone action level has been specifiedthat requires upgrading to Level C protection based on sustained (5-minute average) miniramresults of 2.5 ms/m3. The miniram will also be used to monitor personnel breathing zonewhen wearing Modified Level D protection and to determine when an upgrade to Level C iswarranted.OHM Project 16487SSHSP Health and Safety Plan July 199sInfomation herrin is pr~priclary and confidential and LO be used or released to others only with explicit writt+ permission of OHM Rmdiationsetvieecr Corp.7-2