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t <br /> LABORATORY PROCEDURES <br /> � I <br /> f <br /> The laboratories selected to perform the analytical work are certified by the California <br /> State Department of Health Services as being qualified tope rform the selected analyses. <br /> The selected laboratories are reviewed by Exceltech, Inc. to ensure that they are <br /> certified by the State of California and maintain an adequate quality control program <br /> S„hain-af;f'.na+nrly nntPnt <br /> e <br /> f s The following procedures are used during sampling and analytical activities to provide <br /> t - <br /> chain-of-custody control during transfer of samples from collection through delivery to <br /> tP� the laboratories. Record keeping activities used to achieve chain-of-custody control <br /> are: <br /> Contact made by sampling organization with facility supervisor and laborato <br /> prior to sampling to alert them of dates of sampling and sample delivery. ry <br /> Well location map with well identification number(s) prominently displayed. <br /> E <br /> �� • Field Iog book for documenting sampling activities in the field. <br /> Labels for identifying individual samples. <br /> En <br /> a Chain-of-custody record for documenting transfer and possession of samples. <br /> • Laboratory analysis request sheet for documenting analyses to be performed. <br /> =a ' laieldl+iltrA t^[LCL.cua_ <br /> k "1 Samplers will refrain from filtering TOC, TOX or other organic compound samples as <br /> 4 W the increased handling required may result in the loss of chemical constituents <br /> of <br /> interest. Allowing the sam tis to settle prior to analysis followed by decanting the <br /> g p <br /> Sample is preferable to filtration of these substances. If filtration is necessary for t}e - <br /> determination of extractable organic compounds, the filtration should be performed in <br /> t the laboratory. It may be necessary to run parallel sets of filtered and unfiltered <br /> 7 1. samples with standards to establish the recovery of hydrophobic compounds w <br /> p p hen <br /> x EXCELTECH,INC. <br /> Laboratory Procedures <br /> z Latest Revision: March 28, 1990 <br /> h <br /> sonmay.. Y.,.. ..... - _ <br />