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Analyte <br /> <br />Matrix Spike Matrix Spike Relative Blank <br /> <br />Duplicate % Percent <br />Difference (%) <br />Lead <br />Cadmium <br />Chromium <br />Nickel <br />Zinc <br />95.5 97.0 1.6 NO <br />109 110 0.9 ND <br />114 114 0.0 ND <br />100 100 0.0 ND <br />100 100 0.0 ND <br />Certification 4 1157 <br />Donna Keller <br />Laboratory Director <br />Ptamiro SaIgad <br />Chemist <br />O/23/1S8 16:03 5720916 GECANALYT ICAL L( <br /> <br />PAGE 17 <br />GeoAnalytical Laboratories, Inc. <br />1405 Kansas Avenue Phone (209) 572-0900 <br />Modesto, CA 95351 FAX (209) 572-0916 <br />QC REPORT <br />Date: 9 /17/98 <br />Dates Analyzed: 09/09/98-09/17/98 <br />Method: TTLC <br />Report/ J252-14 <br />Lab n3 J21609 <br />Wright Environmental Services, Inc. <br />67 E 10th Street <br />Tracy CA 95376 <br />Samples Analyzed: J21609,21627,21628,21649-52comp. <br />Sample Spiked: J21609