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Sampling and Analysis Plan for <br /> Phase II Environmental Site Assessment <br /> South Pointe Property: 701, 705, 833, 855 West Weber Avenue <br /> Stockton, California <br /> Request for Analyses <br /> May 17, 2021 <br /> 5.0 REQUEST FOR ANALYSES <br /> 5.1 ANALYSIS NARRATIVE <br /> A total of 60 soil samples will be collected, 20 of which will be held by the laboratory pending review of <br /> soil data. A total of 40 passive vapor samples, and a total of 20 active soil vapor samples, will be <br /> collected. Sample locations and associated analyses are summarized in Table 5-1a below. <br /> Table 5-1 a <br /> Sample Summary <br /> Sample fTotal of <br /> Sample Samples Per Matrix Location Analysis <br /> Type Locations Location Sampleple s <br /> Areas along historical OCPs by USEPA <br /> Soil 20 3 60' Soil rail alignment with Method 8081; lead <br /> Samples insufficient vertical by USEPA Method <br /> delineation of OCPs 6010 <br /> Soil Vapor VOCs by USEPA <br /> Samples- 40 1 40 Soil Vapor Site-wide <br /> Method 8260C <br /> Passive <br /> Soil Vapor Locations dictated by VOCs by USEPA <br /> Samples- 10 2 20 Soil Vapor results of passive soil Method TO-15 <br /> Active vapor survey <br /> Notes and Abbreviations: <br /> 1 -A total of 60 samples will be collected.The deepest sample from each location will be held by the analytical laboratory <br /> pending results of shallow samples. <br /> OCPs-organochlorine pesticides <br /> VOCs-volatile organic compounds <br /> Quality assurance/quality control sampling will be completed in accordance with the project QAPP and as <br /> summarized in Table 5-1 b below. <br /> Table 5-1 b <br /> QA/QC Sample Summary <br /> QA Sample Frequency' Detail Estimated Numbers and <br /> Type Types of Samples Per Analyte <br /> 1 duplicate per 10 samples Duplicate sample to be collected by OCPS/lead in soil (6 <br /> Duplicate per matrix, or 1 duplicate the same methods at the same time duplicates);VOCs in soil vapor- <br /> Samples per sample matrix if fewer as the original sample. Used to verify Passive method (4 duplicates); <br /> than 10 samples. sample and analytical reproducibility. VOCs in soil vapor-active <br /> method (2 duplicates) <br /> `1 Project No.: 185704833.5.3&5.4 5.1 <br />