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B. Guidelines for Handling Samples (Presented in Tables 3-2 and 3-3) <br /> 1 TABLE 3-2 <br /> REQUIRED CONTAINERS, PRESERVATION TECHNIQUES, AND <br /> ' HOLDING TIMES FOR WATER SAMPLES <br /> ' Maximum <br /> Test Container J Preservation Holding Time <br /> Purgeable aromatic G, Teflon- Cool 4 °C Analyze within <br /> hydrocarbons (BTX&E) lined septum 0 008% Na,fj, , A/ 7 days (max. <br /> Method 8020 or 602 HCl to pH2 14 days with <br /> preservative) <br /> Total petroleum G Cool , 4 °C Analyze as soon <br />' hydrocarbons as 0. 0080 NazSvO, J as possible. <br /> gasoline HC1 to pH2 5j (max. 14 days) <br /> Total petroleum G Cool , 4 °C 14 days; ana- <br /> hydrocarbons - lyze extract <br /> diesel fuel oil within 40 days <br /> 10 <br /> Modified from 40 Code of Federal Regulations (CFR) , Part 136, <br /> Guidelines Establishing Test Procedures for the Analysis of <br />' Pollutants Under the Clean Water Act. <br /> 2/ Glass (G) . <br />' J Samples should be analyzed as soon as possible after collection. <br /> The times listed are the maximum times that samples may be held <br /> before analysis and still be considered valid. Samples may be <br />' held for a longer period only if the collector or laboratory has <br /> data on fade to show that the specific types of samples under <br /> study are stable for the longer time. Some samples may not be <br />' stable for the maximum time period given in the table. <br /> A/ Should only be used in the presence of residual chlorine. <br /> 5j Sample receiving no pH adjustment must be analyzed within seven <br /> days of sampling. Sample vials containing hydrochloric acid (HCL) <br /> as a preservative should be handled with caution to avoid eye and <br /> skin contact. <br /> I <br /> . A16 <br />