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Ms <br /> 0 , �X <br /> I <br /> CALIFORNIA WATER LABS <br /> s`E QUALITY ASSURANCE,'QUALITY CONTROL <br /> MANAGEMENT SUMMARY <br /> (Continued) <br /> Confirmations <br /> During organic analysis, all positive compounds without an established baseline <br /> are confirmed by a secondary GC column or by GC/MS (excepting those compounds <br /> b <br /> quantitated by pattern recognition, i.e., PCBs and gasoline.) <br /> Field CRC Samples <br /> Travel blanks and pump/bailer blanks are analyzed only if the associated samples <br /> contain analytes of interest or if results exceed historical baseline data. <br /> DATA QUALITY ASSESSMENT AND REPORTING <br /> If all data fall within acceptable QC criteria.all calculations have been verified for <br /> accuracy,and all instrumental calibration data are within acceptable range, the data <br /> are passed as valid. In the event QC does not meet criteria, an immediate reAew of <br /> all raw data is conducted to determine the source of the discrepancy. If calculations <br /> are correct and instrument data (i.e., calibration standard response, etc.) are <br /> E 3 acceptable, the results are reviewed to evaluate the potential chemical interferences. <br /> If it is determined that interferences are present. a revised or alternate method of <br /> i. analysis may be selected and the samples rerun. If it is determined that there is no <br /> y other apparent reason for the QC data discrepancy, the samples must be reprepared <br /> and reanalyzed. <br /> All results are reviewed by a supervising chemist prior to final report preparation, <br /> and all final reports are reviewed and authorized by a lab director. <br /> The client must specify the level of QA/QC reporting required In the results of <br /> analysis prior to beginning the analysis. USEPA Contract Lab Program equivalent <br /> data packages can be arranged through the laboratory Quality Assurance Manager. <br /> 4a <br /> w7 <br /> For Further Information Contact: <br /> Ms.Gloria Poling <br /> Manager Quality Assurance <br /> California Water Labs <br /> Post Office Box 4249 <br /> Modesto,CA 95352 <br /> (209)527-4050 <br /> p.v <br /> F <br /> a <br /> XXXI/ <br />