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�r <br /> e <br /> A-4 <br /> 3,3 Ann ml Otiality Assurance <br /> In addition,to routine calibration of the analytical instruments with standards and blanks,the analyst <br /> is required to ru• 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 certification 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 M <br /> determined by atomic absorption, ion chromatographv.pr.i9L�iuc:riC methods <br /> ` Volatrle or¢anF- n_-; u'�irrtntred through either purge and imp-o liquid-liquid <br /> r= extraction methods: <br /> Mffipm } <br /> 3.4 Miscellaneous Che^ks of Aczurncy <br /> t 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 major instrumentation;gas chromatograph,atomic <br /> z <br /> absorption, ion chromatography,and total organic carbon analyzers are all serviced and maintained <br /> regularly. <br /> s <br /> The above program is more than sufficient for most needs. Additional quality assurance,such as spikes ' <br /> and duplicates on all analyses,will be provided if requested. <br /> _ z <br /> r <br /> 0 <br />