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A-3 <br /> If these conditions are met, the sample will be assigned a unique log number for identification throughout <br /> analysis and reporting. The log number will be recorded on the chain-of-custody form and in the legally- <br /> required log book maintained by the laboratory. The sample description, date received, client's name, and <br /> any other relevant information will also be recorded. <br /> 3.4 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 precision <br /> and accuracy. Accuracy is also verified through the following: <br /> 1. U.S. Environmental Protection Agency (EPA) and State certification <br /> programs. <br /> 2. Participation in an inner-laboratory or "round-robin" quality <br /> assurance program. <br /> 3. Verification of results with an alternative method. For example,calcium may be determined by <br /> atomic absorption, ion chromatography, or titririmetric methods. ' Volatile organics may be <br /> determined through either purge and trap or liquid-liquid extraction methods. <br /> 3.5 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 chromatograph,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 /> 4.0 SITE SAFETY PLAN <br /> This plan addresses safety provisions to be employed during the site investigative field work in the vicinity <br /> of Thornton Road and Highway 12, Lodi, California. The objectives of the plan is to describe procedures <br /> and actions to protect the worker, as well as the uninvolved parties, from inhalation and ingestion of, and <br /> direst skin contact with, potentially hazardous materials that may be encountered at the site. The plan <br /> describes 1)personnel responsibilities,and 2)protective equipment to be worn as appropriate when working <br /> on the site. <br /> i <br />