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� x •-w# - <br /> M1 r K# <br /> 1 <br /> APPENDIX E <br /> Selgction of the L <br /> The laboratories selected to perform the analytical work are certified by the <br /> Lti <br /> California State Department of Health Services as being qualified to perform <br /> the selected analyses. The selected laboratories are reviewed by Exceltech, <br /> �. Inc. to ensure that an adequate quality control program is in place. <br /> C=hain-of-Custody Control <br /> The following procedures are used during sampling and analytical activities <br /> to provide chain-of-custody control during transfer of samples from - <br /> -% collection through delivery to the laboratories. Record keeping activities <br /> used to achieve chain-of-custody control are: <br /> s ; <br /> o Contact made by sampling organization with facility supervisor <br /> and laboratory prior to sampling to alert them of dates of <br /> a sampling and sample delivery. <br /> o Well location map with well identification number prominently <br /> displayed. <br /> o Field log book for documenting sampling activities in the field. <br /> o Labels for identifying individual samples. <br /> 4 <br /> 4 . <br /> i <br /> Latest Revision: October 9, 1987 <br />