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HASP-Additional Site Investigation for PFAS BSK Project#E20-016-01F Stockton Metropolitan Airport(SCK) May 5,2023 Stockton, California Page 1 1. INTRODUCTION The purpose of this Health and Safety Plan (HASP) is to assign responsibilities, establish personal protection standards and safety procedures, and provide for contingencies that may arise during project operations at Sites containing Per-and Polyfluoroalkyl Substances(PFAS),petroleum hydrocarbons, heavy metals, pesticides/herbicides, and/or unknown chemicals in soil and/or groundwater. This plan complies with, but does not replace, Federal Health and Safety regulations as set forth in the Code of Federal Regulations for Labor,Title 29 Parts 1910 and 1926 (29 CFR), California Health and Safety Regulations as set forth in Title 8, California Code of Regulations, and guidance established by the California Department of Health Services. This HASP is to be used by BSK Associates (BSK) personnel as a supplement to such rules, regulations, guidelines, and in conjunction with BSK's revised Workplan titled "Revised Workplan Additional Site Investigation Per- and Polyfluoroalkyl Substances in Soil and Groundwater Stockton Metropolitan Airport 5000 S. Airport Way, Stockton, California (GeoTracker #T10000012778) (WDR ORDER NO. WQ-2019-0005-DWQ)," dated March 1, 2023. Provisions of this plan are mandatory for on-Site BSK employees engaged in hazardous material management activities including, but not limited to: initial Site reconnaissance, preliminary field investigations, mobilization, project operations, and demobilization where volatile organic compounds are expected and invasive work is limited to exploratory soil borings using hand augers, direct push technology (DPT) drilling rigs, hollow-stem auger (HSA) drilling rigs, and sonic drilling rigs. Changing or unanticipated Site conditions may require modification of this HASP to maintain a safe work environment. Modifications to the plan should be recorded in field notes and reviewed with Site personnel. Under no circumstances will modifications to this plan conflict with federal,state,or local Health and Safety regula- tions. Informal daily tailgate meetings will be held to emphasize work Site hazards, safety procedures, and concerns of on-Site personnel. If applicable, BSK would provide a copy of this HASP to a representative of each on-Site BSK subcontractor in compliance with 29 CFR 1910.120(b)(15)to inform them of potential Site hazards. Each subcontractor provides a HASP to his employees covering exposure to hazardous materials and completes work in accordance with that plan. BSK reserves the right to review each subcontractor's plan for applicability to potential Site hazards. BSK reserves the right to suspend its subcontractor's Site work and ask the subcontractor's personnel to evacuate the hazard area in the event of grossly inadequate Health and Safety precautions on the part of the subcontractor or if the subcontractor's personnel are, or may be, exposed to an immediate health hazard. The subcontractor provides its own safety equipment in accordance with its HASP requirements. The subcontractor will comply with all regulations, including OSHA 29 CFR 1910.134 and 8 CCR 5144 (Respiratory Protection), 29 CFR 1910.120 and Title 8, CCR, Section 5192 (Hazardous Waste Operations and Emergency Response), 29 CFR 1926 (Excavations), and 29 CFR 1910.95 (Noise Hazards and Hearing Protection).