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<br />Geocon Project No. S2170-07-12 - 11 - June 6, 2022 <br />available in Attachment C – PCE. These chemical guides are published in the NIOSH Guide to <br />Chemical Hazards. Detailed information regarding the physical description of lead, including health <br />hazards, routes of entry into the body, signs and symptoms of exposure and target organs, and chemical <br />and physical properties is available in Attachment D – Lead. These chemical guides are published in <br />the NIOSH Guide to Chemical Hazards. <br />3.7.1 Petroleum Hydrocarbons <br />Types/Source: Fuel and lubricants <br /> <br />• TPH: Total petroleum hydrocarbons and <br />• BTEX: Benzene, toluene, ethylbenzene, xylenes, ethanol and other aromatic hydrocarbons <br /> <br />Exposure Route: See Attachment A – NIOSH Guides Petroleum Hydrocarbons <br />Exposure signs/symptoms: ref. Attachment A <br />Qualified Exposure Risk: Low; hydrocarbon impacted soil <br />Hazard Control(s): <br /> <br />• Isolation – site control. <br />• Engineering Controls – work practices and safe sampling procedures: avoid contact with <br />potentially contaminated water; follow sanitation and personal hygiene procedures outlined in <br />Section 4.2. In open work areas, unless there are weather conditions of a stagnant high- <br />pressure system, ambient breezes are usually adequate to minimize potential exposure to <br />hydrocarbon vapors. <br />• PPE – eye (safety glasses or goggles) and, hand protection (nitrile gloves). <br />• Sanitation – good personal hygiene. <br />3.7.1.1 Gasoline <br />CHEMICAL NAME & CAS# ROUTE OF ENTRY PUBLISHED EXPOSURE LIMITS <br />CATEGORY CONCENTRATION SOURCE <br />Gasoline (8006-61-9) Inhalation <br />Dermal <br />PEL-TWA 300 ppm Cal/OSHA <br />PEL-STEL 500 ppm <br />3.7.1.2 Diesel Fuel <br />CHEMICAL NAME & CAS# ROUTES OF ENTRY PUBLISHED EXPOSURE LIMITS <br />CATEGORY CONCENTRATION SOURCE <br />Diesel fuel Inhalation <br />68476-31-3 Skin Absorption <br />TLV-TWA 100 mg/m3 ACGIH <br /> (Vapor & Aerosol)