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SP-1 <br />SWT Engineering <br /> <br />(Z:\PROJECTS\SiteLogIQ\Site Characterization Work Plan\Appendices\Appendix B - Sampling and Analysis Plan\Appendix B - Sampling and <br />Analysis Plan_021424.docx) <br />SAMPLING AND ANALYSIS PLAN <br />Although hazardous materials have not been identified in available site documentation for the <br />Riverbank City Dump, to date, a contingency plan will be in-place should such materials be <br />identified. Potential hazardous materials may include but are not limited to, asbestos, drums <br />containing liquids, and potentially contaminated soils with visual discoloration, or visual <br />presence of burn ash. Heavy metals, asbestos, Total Petroleum Hydrocarbons (TPH), Semi- <br />Volatile Organic Compounds (SVOCs), Polychlorinated Biphenyls (PCBs), and Polynuclear <br />Aromatic Hydrocarbons (PAHs) are the most likely hazardous substances to be potentially found. <br />This sampling plan is intended to document the procedural and analytical requirements for <br />collection and analysis of the potentially contaminated soil hazardous materials. For other <br />hazardous substances, sampling and analysis will be material specific and subject to the profiling <br />requirements of the appropriately permitted destination facility. <br />1. SAMPLING METHODOLOGY <br />Suspected contaminated soil will be stockpiled outside the area of excavation active operations. <br />Each discovery of suspected contaminated soil will be placed into a separate stockpile. The <br />stockpiles will be covered with tarps except during sampling and loading for transport, or upon <br />confirmation that the soils can be retained onsite. Discrete sampling will be used to assess the <br />suspected hazardous materials. The sampling will be conducted by using the authoritative <br />sampling method. This method is based on the subjective judgment of the investigator regarding <br />the location of potential contamination and serves as a valuable investigative tool in ascertaining <br />if a hazardous substance is or is not present. As with most waste sites, the waste material is <br />expected to be highly heterogeneous, and therefore, development of a uniform sampling protocol <br />is not practical. Larger quantities of suspected contaminated soils (approximately 50+ cubic <br />yards) are not anticipated that would justify a more rigorous randomly selected grid sampling <br />program be performed. If such quantities are encountered grid sampling would be done in <br />accordance with Environmental Protection Agency (EPA) and Department of Toxic Substances <br />Control (DTSC) guidance. Where no visual evidence of waste is present, individual sample <br />locations may be composited in accordance with EPA and DTSC guidance. <br />1.1 Sampling Equipment <br />The following equipment will be necessary to perform the sampling: <br />◼ Disposable or stainless steel (SS) trowels <br />◼ Sealable plastic bags <br />◼ Packing and duct tape <br />◼ Cooler and ice or blue ice <br />◼ Wide mouth glass jars <br />◼ 2-inch diameter stainless steel sampling tubes DRAFT