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Appendix A-Sampling and Analysis Plan BSK Project E19-016-01F <br /> Stockton Metropolitan Airport(SCK) March 1, 2023 <br /> Stockton, California Page 5 <br /> 4. SAMPLING METHODOLOGIES <br /> A two-person sample team is recommended: one team member obtains the samples, and the other <br /> records the samples in the Chain-of-Custody (COC) form with sample collection information. If only one <br /> person is collecting samples,wearing layered nitrile gloves such that the top layer can be discarded in the <br /> transition from dirty hands to clean hands. Site observations such as site characteristics and atmospheric <br /> conditions should be recorded. Pictures are to be taken documenting the specific conditions encountered <br /> and how the samples are collected. Field equipment, sampling containers, sampling collection and <br /> storage, laboratory analysis,and equipment decontamination procedures are summarized in the sections <br /> below. <br /> 4.1 Field Equipment <br /> Allowable materials include high-density polyethylene (HDPE), polypropylene, silicone, stainless steel, <br /> nylon, PVC, acetate, and cotton. Do not use any equipment that contains any known fluoropolymers <br /> including but not limited to polytetrafluoroethylene (PTFE, i.e. Teflon® and Hostaflon°), polyvinylidene <br /> fluoride (PVDF, i.e. Kynar°), polychlorotrifluoroethylene (PCTFE, i.e. Neoflon°), ethyl ene-tetrafluoro- <br /> ethylene (ETFE, i.e.Tefzel°),fluorinated ethylene propylene(FEP, i.e.Teflon°, Hostaflon°, and Neoflon®), <br /> and glass. Low density polyethylene (LDPE) should not be used for any items that will come into direct <br /> contact with the sample media. Equipment that contains PFAS materials such as Teflon° coated parts can <br /> be used if the PFAS is internal to the equipment and does not come in direct contact with the environment. <br /> If in doubt about a product, an equipment blank sample should be collected and analyzed. <br /> Presented on Table A-1 is a list of field equipment to be used for soil and water samples. The field <br /> equipment will be transferred to each PRA using a truck. A water level sounder will be used to measure <br /> groundwater levels. All field personnel will be trained in the proper use of field equipment pertaining to <br /> soil and water sampling. <br /> 4.2 Sampling Containers <br /> All bottles used for PFAS sampling, with the exception of soil sleeves and push probe acetate liners, will <br /> be supplied by the laboratory that will also be preforming the PFAS analysis. Sample containers to be <br /> used are summarized in Table A-2. <br /> ElLs <br /> a <br />