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- III Illillllllllllll <br />rr 999 <br />C~L~iD CORE LABORATORIES <br />SAMPLE DELIVERY GROUP NARRATIVE <br />October 23, 1997 <br />Customer: Greystone <br />Project: COSTILLA <br />Core Laboratories Project Number: 972391 <br />As requested by the client, the remainder of sample 972391-2 was re-extracted outside of <br />holding time to confirm original detections for aldrin and alpha-BHC. The re-extracted <br />sample was analyzed and did not show detections for any pesticides. The analyst was <br />instructed to retrieve the original extract for reanalysis. This extract had undergone some <br />evaporation and the extract was re-diluted back to approximately one ml. The results and <br />surrogate recoveries of this reanalysis were not identical to the original results which can <br />be attributed to the approximate re-dilution of the evaporated extract. However, the <br />same compounds that were originally reported were detected in the reanalysis. <br />Kathy IC]ausmeier Linda L. Benkers ,~-, G~ <br />Laboratory Supervisor QA/QC Coordinator <br />/,. <br />J~ <br />~), <br /> <br /> <br />.,e.~.~~.d,..,-..,~,...o..~..o.K,a,_m.~~.~...~..,,.~.,..~a,.....~w,.,..n...~,w~,...,,,~~....d ,~.~.,~...~.~.m,..a~,.,~,..,e.. <br />