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Weather and Temperature Hazards: Activities covered by this HASP will be predominantly conducted outdoors, and temperature extremes could result in heat or cold stress. Sunburn and dehydration are other potential hazards related to work outdoors in California locations. 2.2 Chemical and Dust Hazards Chemical compounds which may be encountered during field activities in the form of liquids, gases, mists, dusts, and vapors have the potential to cause both acute and chronic health problems. Exposures may result from inhalation (breathing), absorption (through direct contact with the skin), or ingestion (eating or drinking). Gasoline vapors in high concentrations (greater than 300 parts per million [ppm]) can cause eye, nose, and throat irritation, headaches, dizziness, and anesthesia. Skin contact with liquid gasoline may result in irritation and dermatitis and absorption of specific toxic petroleum fractions. Hazardous petroleum hydrocarbon substances found in gasoline include the following volatile organic compounds (VOC): benzene, toluene, ethylbenzene, and total xylenes (BTEX) and fuel oxygenates. Benzene is a suspected human carcinogen and, along with toluene and xylenes, can cause damage to an unprotected individual's liver, kidneys, and central nervous system. Ethylbenzene is a skin irritant in vapor and liquid form. Inhalation of dusts can result in increased exposures to soil-bound chemicals (including metals) and pneumoconiosis. Overexposures may occur if dust clouds become visible in normal light. Signs of potential overexposure are congestion of the nasal passages, and irritation of the eyes and respiratory system. The California Occupational Safety & Health Administration (CalOSHA) and the American Conference of Governmental Industrial Hygienists (ACGIH) have established a Permissible Exposure Level (PEL) and Threshold Limit Value (TLV), respectively, for gasoline of 300 ppm. Further, CalOSHA and the ACGIH recommend that an airborne concentration of 500 ppm gasoline not be exceeded for even short periods of time (i.e., 15 minutes). CalOSHA has set the PEL for benzene at 1 ppm. Other applicable PEL's are: 100 ppm toluene, 100 ppm xylenes, 100 ppm ethylbenzene, 25 ppm carbon monoxide, and 50 ppm hexane. The PEL for nuisance dust is 10 mg/m3. 2.3 Monitoring Consistent efforts will be made throughout the project to evaluate the chemical and physical hazards described above. Fire, explosion, and VOC exposure hazards will be evaluated through an exposure monitoring program. All exposure monitoring equipment shall be inspected and factory calibrated prior to arrival on site, and shall be field calibrated prior to the commencement of site activities each day. Only experienced personnel qualified to operate and interpret the monitoring results shall conduct exposure monitoring. Ambient exposure monitoring results will be recorded and communicated with site personnel having potential. The site responsible person will make a determination in the field whether or not exposure monitoring is necessary on site when only routine ground water monitoring well purging and sampling is occurring. BP Arco # HASP Created by: Scott Bittinger Revised by: Evan Lee Fau Template Version: 02.02 Created on: 10/02/2017 Revision date:10/30/2017