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Sampling and Analysis Plan ��� <br /> Port of Stockton—Rail and Bridge,Stockton,CA <br /> • Description of the field procedures, field observations, and sampling methods. <br /> • Field forms including soil boring logs and groundwater sampling forms. <br /> • Laboratory analytical reports. <br /> • Summary of investigation results including discussion of analytical data and comparison with <br /> screening levels as follows. <br /> o Soil analytical results will be compared to the following screening criteria listed on Table <br /> 3.1. <br /> ■ Regional background concentrations for metals from the United States Geological <br /> Survey (USGS) (USGS, 1984; USGS, 2001). <br /> ■ California Department of Toxic Substances Control (DTSC) Health and Ecological Risk <br /> Office (HERO) Note 3 modified soil screening levels for industrial land use (DTSC, <br /> 2020). <br /> ■ EPA Industrial Regional Screening Levels (RSLs)for industrial land use (EPA, 2022). <br /> ■ California Code of Regulations Title 22, Chapter 11 Section 66261.24 (22 CCR <br /> 66261.24). <br /> ■ Soluble Threshold Limit Concentrations (STLC) listed in 22 CCR 66261.24. <br /> ■ Total Threshold Limit Concentration (TTLC). <br /> o Groundwater analytical results will be compared to the following screening criteria listed <br /> on Table 3.2. <br /> ■ EPA RSLs for tap water(EPA, 2022). <br /> ■ DTSC HERO Note 3 recommended Screening Levels for Tap Water Analytes (DTSC, <br /> 2020). <br /> o Structural elements sample analytical results will be compared to the screening criteria <br /> listed on Table 3.3. <br /> ■ Title 17, California Code of Regulations, Division 1, Chapter 8, §35033. <br /> ■ Title 40, Code of Federal Regulations, Chapter 1, Part 745.103. <br /> ■ Title 40, Code of Federal Regulations, Chapter 1, Part 61.141. <br /> • Description of the QA/QC protocols utilized, and <br /> • Conclusions and recommendations. <br /> September 8,2023 1 7 <br />