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ii U <br /> 4.3 Chain of Custody <br /> I <br /> Chain of Custody forms are considered legal 4documents used to track the <br />{ handling of samples. All dates, times, persons and their companies will be <br /> fisted from the time the sample is collected to its ultimate disposal. A <br /> Chain of Custody form will be filled out for all samples taken. <br /> F <br /> 4.4 Sample Analysis � , <br /> A ,I <br /> Any samples collected will be taken to a California certified laboratory at <br /> the end of the day. The soil sample(s) will be analyzed for gasoline <br /> according to modified EPA Method 8015. This method quantifies gasoline <br /> compounds by a solvent extraction of hydrocarbons from the soil matrix, <br /> injection of the solvent into the capillary column of a gas chromatograph, <br /> and flame ionization detection of hydrocarbons. Method 8020 will be used <br /> for analysis of BTEX. <br /> 1 '1 <br /> 4.5 Detection limits for the Analyses <br /> The detection limit for metals in soils is as follows: <br /> Detection <br /> rt Method Analyte Limit ` <br /> I: Mod 8015 Gasoline 2.5 mg/kg. <br /> 8020 Benzene 5 µg/kg <br /> C 8020 Ethyl Benzene 5 µg%kg <br /> I 8020 Toluene 5 pg/kg <br /> 8020 Xylene 5 pg/kg <br /> : <br /> l ' <br />!� Work Plan # Page S <br /> Custom Food Machinery <br /> July 1, 1992 h <br />