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Calscience Environmental Laboratories, Inc. <br /> Analytical Quality Control Report <br /> Client: Environmental Audit, Inc. <br /> Work Order No.: 93-09-408 Reviewed by: <br /> Method: EPA 602 <br /> Date(s) Analyzed: 10/01/93 Date Reviewed: 1A1L <br /> Page: 3 of 5 <br /> Matrix Spike andSpike Replicate Results <br /> [Spike] Replicate Control Limit Control Limit <br /> Ana MamRlel Added [Matrix Sp kel 1aREC [Matrix S ip kel %REC %REG %RPD %RPD <br /> Toluene ND 50 502 100 501 100 70- 130 0 0-20 <br /> i <br /> Chlorobenzene ND 50 51 0 102 506 101 70- 130 1 0-20 <br /> Ethylbenzene ND 50 509 102 506 101 70- 130 1 0-20 <br /> i <br /> Page 3 of 5 notes- <br /> 1 All concentration values contained herein are in ug/L (ppb) <br />