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Sampling and Analysis Plan �� Port of Stockton—Rail and Bridge,Stockton,CA 1 Introduction HDR, Inc. (HDR) has prepared this Phase II Environmental Site Assessment (ESA) Sampling and Analysis Plan (SAP) for the Port of Stockton — Rail and Bridge project (Project) located in the City of Stockton, California. HDR conducted a Phase I ESA in 2023 (HDR, 2023) along approximately 3.5 miles of rail (referred to as the "Site" herein) as shown on Figure 1.0. Recognized environmental conditions (RECs), historical recognized environmental conditions (HRECs), and controlled recognized environmental conditions (CRECs) were identified at 31 locations along the Site or adjoining properties, as potentially containing subsurface hazardous substances or petroleum products which may impact the Site. The Site locations where RECs, HRECs, or CRECs were identified, have been selected for investigation to confirm the presence or absence of contaminants in the subsurface which may require management during Project construction. This SAP describes soil sampling, groundwater sampling, lead-based paint (LBP) and asbestos- containing materials (ACM) sampling from a bridge structure, management of investigative derived waste (IDW), data analysis, worker safety, and report preparation. 1 .1 Site Description The Project consists of railroad lines (Double Track Alignment) affiliated within the Port of Stockton located on the Moss Tract (eastern portion of the Project) and Rough and Ready Island (western portion of the Project), Stockton, California. The boundary of the Project consists of the railroad lines located on these two areas as shown on Figure 1. The Project is divided into four (4) reference areas (Figure 2.0-2.4). Reference Area 1 — This area is south of the Deep Water Ship Channel, west-northwest of San Joaquin River, and south of Rough and Ready Island. It includes the McCloy Class yard to the west and Stations 0 to 15 to the east. Reference Area 2 — This area is south of the Deep Water Ship Channel, east of San Joaquin River, and north of Moss Tract. It includes Stations 15 to 40. Reference Area 3 — This area in south of the Deep Water Ship Channel, east of San Joaquin River, and northeast of Moss Tract. It includes Stations 45 to 75. Reference Area 4— This area in south of the Deep Water Ship Channel, east of San Joaquin River, and east of Moss Tract. It includes Stations 85 to 130. 1 .2 Sampling and Analysis Objective The objective of the Phase II ESA is to identify the presence of contaminants in the subsurface and on a truss bridge that could affect construction worker safety, soil reuse or disposal, and bridge demolition and disposal (Figure 1.0). The Project construction will generate soil from excavations within the Site. The depth of soil excavation varies depending on the construction activity to be performed at a particular segment of the Site. Although groundwater is not expected to be generated as part of the construction activities, groundwater samples will be collected at the location of the new bridge as ground water may be generated during construction of the foundations. The truss bridge September 8,2023 1 1