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Health and Safety Plan 455 E 11th St Tracy,California 3.0 HAZARDS Hazards that could be encountered include chemical hazards, environmental hazards, biological hazards, and/or physical hazards.The sub-categories of these four types of hazards are explained in further detail below. 3.1 Chemical Hazards Chemical hazards may be encountered during the field activities to be conducted at the Site. These hazards may be encountered through inhalation, absorption, or ingestion.The primary contaminants of potential concern (COPCs) are heavy metals including lead and arsenic,TPH-g, diesel (TPH-d), and motor oil (TPH-mo),volatile organic compounds (VOCs), and organochlorine pesticides (OCPs). 3.1.1 Absorption and Ingestion Risk In general,the anticipated concentrations of COPCs in soil and groundwater are such that the absorption and ingestion risk can be minimized by proper personal hygiene and use of personal protective equipment (PPE).The PPE requirements are discussed further in Section 8.0. If work is anticipated in areas where one or more of the COPCs exceed acceptable risk-based screening levels;the work practices, engineering controls, and required PPE will be assessed and modified as necessary in an addendum to this HASP. 3.1.2 Inhalation Risk 3. 1.2. 1 Metals The inhalation risk associated with metals impacts is unlikely during the boring and sampling activities because the sampling methods should generate minimal dust. If future activities at the Site are more likely to produce significant dust (i.e. excavation), then dust monitoring or air monitoring for specific metals may be necessary. Action levels would have to be developed as necessary based on soil analytical data in the proposed work areas. 3. 1.2.2 Total Petroleum Hydrocarbons and Associated Semivolatile and Volatile Organic Compounds Inhalation risk associated with TPH and associated VOCs and SVOCs is possible when disturbing the subsurface(e.g., soil borings). During the periods of field activities when the subsurface is disturbed, real-time air monitoring of the worker breathing zone will be conducted. Air monitoring is discussed further in section 9.0. If field personnel experience short-term health effects such as headaches, nausea, or eye and respiratory irritation that are often associated with VOCs, he or she will take a break to relieve symptoms and further assess the risk to other personnel in the immediate area. Appendices Terraphase Engineering Inc.