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1 <br /> B-4 <br />' If these conditions are met, the sample is assigned a unique log number for identification throughout <br /> • analysis and reporting The log number is recorded on the chain-o€-custody form and in the legally- <br /> required log book maintained by the laboratory in the laboratory The sample description, date received, <br /> client's name, and any other relevant information is also recorded <br /> 2.3 Analytical Quality Assurance <br /> In addition to routine calibration of the analytical instruments with standards and blanks, the analyst is <br /> required to run duplicates and spikes on 10 percent of the analyses to insure an added measure of <br />' precision and accuracy Accuracy is also verified through the following <br />' 1 EPA and state-certified programs <br /> 2 Participation in an interlaboratory or "round-robin" quality assurance program <br /> 3 Verification of results with an alternative method For example, calcium may be determined <br /> by atomic absorption, ion chromatography, or titrimetric methods Volatile organics may <br /> be determined through either purge and trap or liquid-liquid extraction methods <br /> 9.4 Wiseellanecus Checks of Accurww <br /> Where trace analysis is involved,purity of the solvents, reagents, and gases employed is of great concern <br /> The laboratory maintains a service contract on all mayor instrumentation, gas chromatograph, atomic <br /> ' absorption, ion chromatography, and total organic carbon analyzers are all serviced and maintained <br /> regularly <br /> The aboveP rogram is more the sufficient for most needs Additional quality assurance, such as spikes <br /> and duplicates on all analyses, will be provided if requested <br /> r <br />