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Sampling and Analysis Plan �� Port of Stockton—Rail and Bridge,Stockton,CA 3 Investigation Approach and Methods The following sections present methods to conduct the Phase II ESA. 3.1 Right of Entry, Permitting and Utility Clearance The following will be completed prior to performing field operations. a. Coordinate Site access with the client. A point of access will be provided by the client for the Site. b. Obtain drilling permit(s)from the San Joaquin County Environmental Health Department (SJC EHD). c. Conduct a site visit to evaluate site access and mark boring locations for underground utility locating. d. Contact USA North 811 at least 72 hours prior to drilling and obtain subsurface utility clearance for the boring locations. USA North 811 tickets will be renewed at least 48 hours prior to expiration if drilling was not completed within 28 days of ticket issue. e. Schedule a private utility locating contractor to assess presence of underground utilities at each boring location. HDR will contact BNSF to locate and mark all utilities located in the BNSF ROW. f. Notify SJC EHD at least one week in advance of the proposed start date for the field work. 3.2 Sampling and Analytical Methods Descriptions of the Site and significant adjoining properties are provided in Appendix B. General field procedures will be conducted in accordance with Standard Operating Procedure 1 (SOP 1)(Appendix C). Methods to conduct soil, groundwater, LBP, and ACM sampling are presented below. A more detailed description of sampling methods is presented in SOP-2, provided in Appendix C. Discrete sampling locations for soil and groundwater are illustrated on Figures 2.1 through 2.4. Sample locations for LBP and ACM are illustrated on Figure 2.5. 3.2.1 Soil Sampling and Analysis Soil samples will be collected from borings identified on Table 2.1 and depicted on Figures 2.1 through 2.4. Figure 2.0 provides a key map for reference areas depicted in Figures 2.1 to 2.4. At each sampling location, soil will be extracted using either hollow stem auger(HSA)or direct push technology (DPT). HSA will be used for borings terminating at less than 3 feet (ft) below ground surface (bgs)and DPT will be used for borings terminating at depths of 10 ft bgs or greater. In the event DPT is required, continuous soil cores will be collected in 5-foot sections to boring termination. In both cases, soil will be classified and logged in accordance with ASTM D 2488-17e1, the Standard Recommended Practice for Description of Soils (Visual Manual Procedure), which is based on the Unified Soil Classification System (USCS). Soil will also be screened for volatile organic compounds (VOCs) using a photoionization detector (PID). Field forms, including boring logs and the daily field report, will be completed daily to document sampling activities and site conditions (Appendix D). September 8,2023 1 3