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CHEMICAL NAME CAS# ROUTES OF ENTRYPUBLISHED EXPOSURE LIMITS <br /> CATEGORY CONCENTRATION SOURCE <br /> Lead,Elemental& Inhalation TLV-TWA/PEL 0.05 mg/m3 ACGIH/ <br /> Inorganic Compounds Ingestion PEL-TWA 0.05 mg/m3 OSHA <br /> 7139-9?-1 <br /> 3.5.3 Petroleum Hydrocarbons - Gasoline; Diesel Fuel; Aromatic Petroleum Distillates <br /> Types/Source: Automotive fuel and lubricants <br /> • TPH: Total petroleum hydrocarbons <br /> • BTEX: Benzene,toluene,ethylbenzene, and xylenes, including other aromatic hydrocarbons <br /> Exposure Route: Inhalation, skin absorption; ref. Attachment F-NIOSH Guides Petroleum <br /> Hydrocarbons <br /> Exposure signs/symptoms: Ref Attachment C-NIOSH Pocket Guide to Chemical Hazards <br /> Qualified Exposure Risk: Low <br /> Hazard Control(s): <br /> • Isolation—site control <br /> • Engineering Controls-work practices and sampling procedures; wet methods to suppress visible <br /> airborne dust <br /> Avoid contact with potentially contaminated soils; follow sanitation and personal hygiene <br /> procedures outline in Section 4.2. In open work areas, unless there are conditions of a stagnant <br /> high-pressure system, ambient breezes are usually adequate to minimize potential exposure to high <br /> concentrations of gasoline vapor. <br /> If free liquid is encountered, extreme caution must be taken to prevent sources of ignition from <br /> coming into contact with gasoline vapors. Maintain a 50-foot no smoking zone (also referred to as <br /> the Exclusion Zone). <br /> • PPE—eye (safety glasses or goggles) and, hand protection (leather and/or impermeable gloves) <br /> • Sanitation—good personal hygiene <br /> 3.5.3.1 Gasoline <br /> PUBLISHED EXPOSURE LIMITS <br /> CHEMICAL NAME AND CAS# ROUTE OF ENTRY <br /> CATEGORY I CONCENTRATION SOURCE <br /> Gasoline(8006-61-9) Inhalation TLV/PEL-TWA 300 ppm ACGIH/ <br /> Dermal TLVPEL-STEL 500 ppm Cal/OSHA <br /> Stockton 6-Lane,Task Order No.82 Caltrans Contract 06AI 141,EA 10-03A1001 <br /> Project No.S9200-06-82 - I 1 - December 2009 <br />