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December 23, 1999 Pnge C-.i <br />• - [fa bailer is used, a discrete source bailer should be lowered slowly into contact with <br />the water in the well. Whether using a bailer or submersible pump, collect the <br />sample from the same depth within the screened interval in the well each time the <br />we[I is sampled. <br />- Field parameters (temperature, pH, and conductivity) have been measured during <br />purging. Collect a sample via bailer or pump for the final field parameter <br />measurement. Record in the log book and on the groundwater sampling data sheet. <br />- Collect samples and fill sample containers in the appropriate order, as determinated <br />by the analytical laboratory or the environmental manager whether using a bailer or <br />a submersible pump. Filtering procedures are described in Section C.3.6. <br />- Record the time of sampling in the field log book, on the groundwater sampling data <br />sheets, and on the sample bottle labels. <br />- Wipe off sample bottles with a paper towel. Write the time of collection on each <br />label, initial, and cover with clear tape. <br />- Place samples in bags on ice in a cooler. <br />- Replace and lock the well cap. <br />- Complete field documentation. <br />' C.3.5 Sample Identitication/Labeling <br />Proper sample identification is critical to data management and data quality. This section <br />describes the sample identification and documentation, to assure that the quality of samples is <br />maintained during collection, transportation, storage, and analysis. <br />Documents used to account for sample custody include: <br />- Sample identification numbers <br />- Sample tags or labels <br />- Custody seals <br />- Chain-of-Custody records <br />- Field log books <br />- Analytical records <br />• C.3.5.1 Snnrple Identifrcnt/on Naniber <br />Unique sample numbers will be assigned to each sample. <br />Agapito Associates, Inc. <br />