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' Job No. 4780201 • • 8 <br /> ' 5.0 RESULTS <br /> ' The laboratory reports documenting the results of sample analyses will be <br /> presented in an Appendix within the Monitoring Well Installation Report, and <br /> ' the results of soil and groundwater sample analyses will be summarized in a <br /> table. <br /> ' 5.1 Laboratory Quality Assurance/Quality Control <br /> ' The purpose of a quality assurance/quality control program is to follow field and <br /> laboratory sampling and handling procedures that will allow the generated data <br /> to be scientifically valid, defensible, and of appropriate quality. Laboratory <br /> testing will be performed by a laboratory certified by the State of California DHS <br /> ' to perform the types of analyses requested. Each laboratory has documented <br /> procedures for handling, preparing, and testing samples for the various types of <br /> ' compounds for which that laboratory is certified to test. Copies of these <br /> procedures are available at the laboratories and will be provided upon request. <br /> 1 <br /> The laboratory will check analytical results, as necessary, by analyzing field <br /> blanks or duplicate samples. Field blanks or duplicate split samples may be <br /> submitted "blind," and randomly, to the laboratory under separate sample <br /> numbers. Duplicate samples may also be submitted to different laboratories for <br /> ' testing to cross-check analytical results. <br /> tLaboratory reports will be reviewed to check that analyses are completed within <br /> the recommended sample holding times and that proper sample preservation, <br /> ' preparation, and extraction techniques have been used. Measurements of <br /> percent recovery for spiked samples will be evaluated for compliance with <br /> ' established laboratory control limits. Data identified as being of sufficient <br /> quality will be used; suspect data will be identified as such. <br /> 1 <br /> ' E2C, Inc. April 4, 1997 <br />