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Phase II Sampling and Analysis Plan SOP-2—Drilling and Sampling Port of Stockton-Rail and Bridge,Stockton,CA FN STANDARD OPERATING PROCEDURE 2 — DRILLING AND SAMPLING 1 Purpose and Summary This Standard Operating Procedure (SOP) provides guidance for drilling and sampling operations. This SOP provides general guidance; the project-specific work plan must be reviewed for specific project requirements. 2 Overview There are several methods by which drilling operations may be conducted including pneumatic shoveling, manual (hand) auger, hollow stem auger(HSA), direct push technology (DPT), sonic drilling, and cable tool or mud rotary drilling with installation of surface casing. Drilling methods planned to be employed for this investigation include HSA and DPT. Drilling activities will be conducted by a licensed subcontractor with experience on similar projects. The drilling subcontractor will advance a boring to the target depth using the selected drilling technology and provide equipment sufficient to carry out the work as specified. Drilling and sampling will be overseen by the field team leader (FTL), an environmental professional (engineer, geologist, or environmental scientist), and support staff if required. HDR, Inc. (HDR) personnel will prepare soil boring logs with lithologic descriptions and observations relevant to investigative activities, collect samples for field, geotechnical or laboratory analysis, and monitor compliance with the Project Site- specific Health and Safety Plan (HASP). 3 Health and Safety Proper safety precautions must be observed during drilling activities and when collecting samples in accordance with the HASP. Each individual assigned to field work must: (1) participate in the HDR Medical Monitoring Program, or subcontractor medical surveillance program, as applicable, and (2) must have taken the Occupational Safety and Health Administration (OSHA)40-Hour HAZWOPER course (updated with the 8-Hour OSHA Refresher, when necessary). Each individual is required to have read and understood the HASP for the specific project activity. Upon arrival at the site, each person shall sign the acknowledgement sheet confirming their review of the HASP. Personal protective equipment (PPE) and other provisions for site safety requirements are discussed in the HASP. At a minimum for drilling, personnel will wear a hard hat, steel toe shoes, safety glasses, hearing protection, and a high visibility outer garment. Different forms of PPE may need to be selected when sampling for PFAS (see Section 3.1). Equipment will only be used by properly trained personnel. In particular, the use of a photoionization detector(PID)will only be performed by personnel familiar with the equipment. Proper tools will be made available to each employee as necessary. Questions should be directed to the FTL. 2-1