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THE REMEDIATION GROUP, inc <br /> 2.4 Sample Labelling <br /> Sample containers, either glass or plastic, will be labelled with self-adhesive, preprinted tags with <br /> the following information <br /> o project number <br /> o sample number <br /> o sample location (well number, etc } <br /> o date and time samples were obtained <br /> o treatment (preservative added, filtered, etc ) <br /> o initials of sample collector <br /> Sample tags shall be filled out using waterproof ink <br /> 2.5 Sample Preservation and Storage <br /> The proper preservation and storage of water samples is dependent on the chemical analyses to <br /> be performed, and will, therefore, be discussed with the analytical laboratory prior to sample <br /> collection These requirements will be adhered to in the preservation and storage of water <br /> samples <br /> 2.6 Quality Control Samples <br /> In order to document the precision and accuracy of analytical data generated by the <br /> subcontracted, state-certified, hazardous waste laboratory, one or more of the following <br /> procedures will be periodically employed <br /> A Blind Duplicate Sample - A double volume of water will be collected and then divided <br /> into identical containers that are given different location identification names or sample <br /> numbers These numbers will be recorded on a data sheet for later reference Both <br /> samples will be submitted to the laboratory for identical analyses and will then serve as <br /> a means of measuring analytical precision as well as a way of confirming results for a <br /> specific sample Field duplicates can also be collected as splits and sent to different <br /> laboratories Duplicate samples will be taken once every ten samples, or according to <br /> pre-determined project quality control goals <br /> B Travel Blank Sample - The effect of handling and transporting, and the accuracy of the <br /> analytical determinations may be estimated by using travel blank samples This sample <br /> will be prepared by the laboratory supplying the sample containers by filling the <br /> containers with organic-free water This blank will be used to identify contamination <br /> introduced from the originating laboratory The trip blank will remain with the collected <br /> samples and will be analyzed along with the field samples to check residual <br /> contamination One trip blank will generally be used per sample set <br /> Protocol gw 3 16 July 1994 <br />