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i <br /> r <br /> LABORATORY PROCEDURES <br /> The laboratories selected to perform the analytical work are certified by the California <br /> State Department of Health Services as being qualified h e oto ensure that they nTi the selected Bare <br /> The selected laboratories are reviewed by Exc , <br /> -' maintain an adequate quality control program <br /> certified by he State of California and <br /> lin and anal tical activities to provide <br /> The following procedures are used during sampling y <br /> chain-o€custody control during transfer of samples from collection through delivery to <br /> the laboratories. Record keeping activities used to achieve chain.of-custody control <br /> are: <br /> Contact made by sampaing organization with facility supervisor and laboratory <br /> prior to sampling to alert them of dates of sampling and sample delivery. <br /> ~ � <br /> Well location map with well identification number(s)prominently displayed. <br /> • Field log book for documenting sampling activities in the field. <br /> e Labels for identifying ind vidual samples. <br /> ii Chain-of-custody record for docurnenting transfer and possession of srunples: <br /> 1 <br /> s � <br /> Laboratory analysis request sheet for documenting analyses to be Performed• <br /> ! !r! E Itration of Samil <br /> i <br /> Samplers will refrain from filtering TOC, TOX or other organic compound samples as <br /> of t i <br /> j the_increased.handling required may result in the loss of chemical constituents of <br /> interest., Allowing the samples to settle prior to analysis followed by decanting.-the <br /> ' sample is preferable to firsrion of these substances. If filtration is necessary for the <br /> e. organic compounds, the filtration shouldbe performed in <br /> determination of estractabl <br /> the laboratory. If may be necessary to run parallel sets of filtered and unfiltered <br /> samples with standards to establish the recovery of hydrophobic compounds when <br /> EXCELTECH, INC, <br /> Laboratory Procedures <br /> Latest Revision: March 28, 1990 <br />