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3.5.3.2 Diesel Fuel <br /> CHEMICAL NAME AND CAS# ROUTES OF ENTRY PUBLISHED EXPOSURE LIMITS <br /> CATEGORY CONCENTRATION SOURCE <br /> Diesel fuel Inhalation TLV-TWA 100 mg/m3 ACGIH <br /> 68476-31-3 Skin Absorption (Vapor&Aerosol) <br /> 3.5.3.3 Aromatic Petroleum Distillates <br /> CHEMICAL NAME AND CAS# ROUTES OF ENTRY PUBLISHED EXPOSURE LIMITS <br /> CATEGORY CONCENTRATION SOURCE <br /> Naphtha(VM&P) Inhalation TLV-TWA 300 ppm ACGIH/ <br /> 8032-32-4 PEL-TWA 100 ppm Cal/OSHA <br /> Naphthalene Inhalation TLV/PEL-TWA 10 ppm ACGIH/ <br /> 91-20-3 Skin Absorption TLV/PEL-STEL 15 ppm Cal/OSHA <br /> Benzene Inhalation TLV/PEL-TWA 0.5 ppm ACGIH/ <br /> 71-43-2 Skin Absorption TLV/PEL-STEL 2.5 ppm Cal/OSHA <br /> Ethylbenzene Inhalation TLV/PEL-TWA 100 ppm ACGIH/ <br /> 100-41-4 TLV/PEL-STEL 125 ppm Cal/OSHA <br /> Toluene Inhalation TLV/PEL-TWA 50 ppm ACGIH/ <br /> 108-88-3 Skin Absorption Cal/OSHA <br /> Xylenes Inhalation TLV/PEL-TWA 100 ppm ACGIH/ <br /> 1330-20-7 TLV/PEL-STEL 150 ppm Cal/OSHA <br /> 4.0 GENERAL HEALTH AND SAFETY REQUIREMENTS <br /> 4.1 Air Monitoring - Metals <br /> Industrial hygiene monitoring will not be performed for asbestos-containing materials for T22 metals, <br /> including arsenic, cadmium and inorganic lead sampling tasks being carried out for this project. Based <br /> on representative monitoring data while performing similar sampling and characterization activities, <br /> the potential for airborne concentrations to exceed the Cal/OSHA Permissible Exposure Limit(PEL) or <br /> Action Level for either asbestos or lead is low. Negative Exposure Assessments and/or objective data <br /> for representative tasks, using similar controls, and carried out within the past twelve months document <br /> exposures consistently below the PEL/Action Limit(ref. T8 CCR §1529(f)(2)(C) §1532.1(d)(5)(A)). <br /> 4.2 Air Monitoring — TPHg, TPHd, BTEX <br /> The necessity for evaluating potential airborne concentrations of vapors from petroleum hydrocarbons <br /> will be determined during the project by the Project Manager or SSO. Based on preliminary <br /> information from previous sampling and characterization activities conducted at these sites, the <br /> potential for significant exposure to these contaminants is low. <br /> If necessary, based on observations, odors, or other information which becomes available during <br /> groundwater monitoring activities, potential exposure to volatile organic hydrocarbons will be <br /> Stockton 6-Lane,Task Order No.82 Caltrans Contract 06A1141,EA 10-03A1001 <br /> Project No.S9200-06-82 - 12- December 2009 <br />