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.6 <br /> 4.3 Chain of Custody <br /> Chain of Custody forms are considered legal documents used to track the <br /> handling of samples. All dates, times,persons and their companies will be <br /> listed from the time the sample is collected to its ultimate disposal. A E <br /> ' Chain of Custody form will be filled out for all samples taken. <br /> 4.4 Sample Analysis <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 /> .F <br /> 4.5 Detection limits for the Analyses 3 <br /> The detection limit for metals in soils is as follows:' <br /> Ir <br /> 3,y <br /> Detection <br /> Method Ate Lima <br /> Mod 8015 Gasoline 2.5 mg/kg <br /> 8020 Benzene 5 µg/kg <br /> 8020 Ethyl Benzene 5 µg/kg <br /> 8020 Toluene 5 µg/kg <br /> 8020 Xylene 5 µg/kg <br /> ,I <br /> l <br /> r <br /> �Y <br /> it <br /> i` <br /> � I <br /> Work Plan Page S <br /> Custom Food Machinery <br /> July 1, 1992 <br /> �I 1 <br />