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December 23, 1999 <br />Page C-5 <br />Ifa 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 />1 well is sampled. <br />Field parameters (temperature, pH, and conductivity) have been measured during <br />1 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 />1 ~ Collect samples and fill sample containers in the appropriate order, as determinated <br />1 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 Identification/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 Sample Identifiention Number <br />Unique sample numbers will be assigned to each sample. <br />' Agapito Associates, Inc. <br />