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CaIscience Environ m al Laboratories, Inc. <br /> Analytical Quality Control Report <br /> Client: Environmental Audit, Inc. <br /> Work Order No.: 93-03-070 Reviewed by: <br /> Method: EPA 602 <br /> Date(s) Analyzed: 03!09193 Date Reviewed: -3-11L ! <br /> Page: 2 of 3 <br /> Matrix Spike sind Spike Repligite Re It <br /> [Spike] Replicate Control Limit Control Limits <br /> Analyte [Sample) Added jMaIrm apM °!DREG [[Matrix S ip kel %REC 1sHPQ <br /> Toluene ND 20 22 110 21 105 70- 130 5 0-20 <br /> Chlorobenzene ND 20 22 110 21 105 70- 130 5 0-20 <br /> Ethylbenzene ND 20 22 110 21 105 70- 130 5 0- 20 <br /> i <br /> Page 2 of 3 notes: <br /> 1 All concentration values contained herein are in ug/L (ppb) i <br />