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Chain of Custody -- All samples accompanied by Chain of Custodyaf�` -G- documentation have the following information listed: 1), bate 2). Client 3). Address 4). Phone Number 5). Project Name 6). Project Manager 7), Sampler(a) 8). Sample Number 9). Location Description 10). Date Sampled 11). Time Sampled 12). Number of Containers 13). Tests Required 14). Date Needed by 15). Relinquished by 16). Received by 17) Date Received 18). Time Received See page 26 for a sample copy of the Chain of Custody Form used by FGL Environmental. IV. Sources and Preparation of. Standards Chemicals used in the laboratory are obtained from major suppliers and are usually reagent grade or better. Standards are also obtained from these suppliers and a log showing the name of the supplier, the lot number, and the date the standard was received is kept. A los book for the standards prepared from the commercial standards is also kept which shows the source, the volume of standard used, the date prepared, and the name of the analyst/preparer. V. Methods of Analysis and Calibration Procedures Methods used for sample analysis are either from the EPA or from Standard Methods. The ranges selected are those which bracket most of the unknown samples or those for which the instrument will provide a consistent and/or linear response. instrument performance is established by calibration with standard solutions and these standards are checked against EPA reference samples. Laboratory notebooks are kept which show the weight, volumes and dilutions used, and also data and calculations when required. When a new batch of titrant is made, a standard snould he analyzed in triplicate to insure that the new titrant is suitable. Chemical standards for BOD5 and COD tests should he analyzed monthly. For all organic analyses, three point calibration curves should be generated and documented. On each working day, standards should be run, and so long as the standards are within 20Z of the predicted response, samples can be analyzed (otherwise, the three point calibration will be rerun). Sample data must be bracketed b; standards. VT. Analysis of External Reference Standards Standards obtained from the EPA are used to check tho calibration standards. When such reference standards are not available a second standard is obtained (usually from a different source) and Is used to check the calibration standards. RECEIVE❑ i';F"%R 1 3 1990