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1 <br /> E-3 <br /> ' 1 U S Environmental Protection Agency (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 be determined by <br /> atomic absorption, ton chromatography, or titnmetnc methods Volatile organics may be <br /> determined through either purge and trap or liquid-liquid extraction methods <br /> 2.4 Miscellaneous Checks of Accuracy <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 major instruments,gas chromatographs,atomic absorption, <br /> ion chromatography, and total organic carbon analyzers are all serviced and maintained regularly <br /> ' The above program is more than sufficient for most needs Additional quality assurance,such as spikes and <br /> duplicates on all analyses, will be provided if requested <br /> 1 <br /> 1 <br /> 1 <br />