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sample must be filtered. All the materials' precautions used in the construction of the <br /> sampling train should b-- observed for filtration apparatus. Vacuum filtration of <br /> groundwater samples is not recommended. <br /> Water samples for dissolved inorganic chemical constituents (e.g., metals, alkalinity and <br /> anionic species) willbe filtered in the field. <br /> Sample containers vary with each type of analytical parameter. Selected container types <br /> and materials are non-reactive with the sample and the particular analytical parameter <br /> being tested. Appropriate containers for volatile organics are glass bottles of at least 40 <br /> milliliters in size fitted with teflon-faced silicon septa. Sample containers are properly <br /> cleaned and sterilized by the certified laboratory according to the EPA protocol for the <br /> individual analysis. <br /> Ment <br /> Various preservatives are used by the certified laboratory to retard changes in samples. <br /> Sample shipment from Exceltech to laboratories performing the selected analyses <br /> ALL <br /> routinely occurs within 24 hours of sample coUcction. <br /> S +' <br /> f� The analysis of groundwater samples is conducted in accordance with accepted <br /> ? _ quantitative analytical procedures. The following four publications are considered the <br /> 5 primary references for groundwater sample analysis, and the contracts with the <br /> 3 Iaboratories analyzing the samples stipulate that the methods set out in these publications <br /> be used: Please note that Procedures used ed are Feriodically updated by federal and stx�e <br /> Y agencies, and the certifie <br /> �. d laboratories abor , <br /> atone <br /> s <br /> amen <br /> _ d analysis as required uued b th <br /> °i � Y e update. <br /> se <br /> BagdadM <br /> ;x in n Wa ran d N4itQw4er 16th Ed., <br /> Y ' f <br /> American Public Health Association,et al., 1985. <br /> --•� .. ..:fes. • ., _ <br /> Methods fo her.,6.•�� e,...i. � <br /> la52Nw ` W' r , U.S.-EPA, GOO/d.=79- <br /> 020,March I979. <br /> U.S.EPA SW-846, 1982. n. 1 W h i I h i t <br /> EXCELTECH, INC. <br /> Laboratory Procedures <br /> Latest Revision: March 28, 1990 <br /> 3 <br />