FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Chain of Custod- • All samples accompanied by ChaFr •1of Custody documentation !� the following information" 1 i sts, : �j 1 ) . Date 10) . Date Sampled 2) . Client 11 ) . Time: Sampled 3) . Address 12) . Number of 'Containers 4) . Phone Number 13) . Tests Required i 5) . Project Name 14) . Dated Needed by 6) . Project Manager 15) . Relinquished by 7) . Sampler(s) 16) . Received by I, 8) . Sample Number 17) . Date�!Received 9) . Location Description 18) . Time; Received a See page 29 for a sample copy of the Chain sof Custody Form used by FGL 1 Environmental . IV. Sources and Preparation of Standards Chemicals used in. the laboratory are obtained from major suppliers and are usually reagent grade or better. Stand°ards are also obtained from these suppliers and certification documentslare kept on file. The date the standard was received is recorded on the document. Labels are attached to each standard and contain the following: Element, date prepared, prepared by, source verification and expiration date. A log book for the standards prepared from the commercial standards is also kept which is labeled indicating the source, the, volume of standard used, the date prepared, the name of the analyst/preparer, and how verified. In those instances where the above procedure is not possible, the chemist notebook will contain this information. 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 i; and/or linear response. Instrument performance is established by calibration with standard solutions and those standards are checked against EPA reference samples. Laboratoryilnotebooks 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 is analyzed in �I triplicate to insure that the new titrant i I s suitable. Chemical standards for B005 and COD tests are to be analyzed monthly. For all organic analyses, three point calibration curves are generated and documented. On each working.J�day, ':standards are usually run, and so long as the standards are within 20% of the predicted response, samples can be analyzed (otherwise, the three point calibration will be rerun) . Sample data must be bracketed by standards. . VI . Analysis of External Reference Standards !% i� Standards obtained from the EPA are used to check the 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. '! 1 -10- t 'F