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Project No.034-9$081 <br /> Page No. 10 <br /> TABLE 1 <br /> HYDROCARBON VAPOR CRITERIA AND RESPONSES <br /> HYDROCARBON CONCENTRATIONS RESPONSE <br /> X50 ppmv TVH Limited hazard, no special action. <br /> ' 50-100 ppmv TVH General Work Areas Half-mask OV Respirators worn by all potential <br /> L, exposed in work area. <br /> 50-1400 ppmv TVH General Work Areas Half-mask OV Respirators worn by all potentially <br /> ' exposed in work area. Benzene detector tube <br /> measurements taken each 15 minutes until levels <br /> below 1 ppm. <br /> 16— >1400 ppmv TVH General Work Areas Work stops; procedures taken to subdue excessive <br /> and/to well head emissions vapor levels. <br /> >1 ppmv Benzene at Breathing zone Half-mask OV Respirators worn by all potentially <br /> �+ exposed in work area. Benzene detector tube <br /> measurements taken each 15 minutes until levels <br /> below 1 ppm. <br /> L. <br /> ppmv = parts per million vapor <br /> TVH = Total Volatile Hydrocarbons <br /> OV = Organic Vapor <br /> 5.0 PERSONAL PROTECTIVE CLOTHING/EQUIPMENT REQUIREMENTS <br /> This section specifies personal protective clothing/equipment required for the various tasks to be <br /> performed during this investigation. Table 2 summarizes these requirements. <br /> li... <br /> 5.1 Drilling_Operations <br /> • Respiratory Protection: All field personnel will be required to have available for <br /> use, a properly fit tested half-mask air purifying respirator with organic vapor <br /> cartridges and particulate pre-filters. These will be required to be worn based on <br /> the criteria listed in Section 4.0. <br /> 16- Protective Clothing: All field personnel who handle contaminated soils, liquid, or <br /> auger flights will wear semi-permeable(white)Tyvek®coveralls (or equivalent). <br /> Company issued safety helmets will be worn by all personnel during field work. <br /> • Hand Protection: Butyl rubber or nitrile gloves will be worn by all personnel <br /> handling auger flights and contaminated soils. Wearing disposable latex or PVC <br /> KRAZAN& ASSOCIATES,INC. <br /> Offices Serving the Western United States <br />