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Calscience Envlronme aI Laboratories, Inc. <br /> Analytical Quality Control Report <br /> Client Environmental Audit, Inc <br /> Work Order No . 92-07-022 Reviewed by <br /> Method EPA 8240 J <br /> Date(s) QC Analyzed: 07/13/92 Date Reviewed '�_I_� 192 <br /> Page 9 of 12 <br /> Matrix Spike and Spike„ ,Replicate Results <br /> (Spike] Replicate Control Lima Control Limit <br /> Analyte fSamplel Added [Matrix Spikel %REC [Matrix Spike] %REC %REC %RPD %RPD <br /> Benzene ND 50 51 102 41 82 65 - 130 22 0- 25 <br /> Chlorobenzene ND 50 51 102 53 106 70 - 130 4 0- 25 <br /> Toluene ND 50 61 122 60 120 70 - 130 2 0- 25 <br /> 1,1-Dichloroethene ND 50 40 80 44 88 65 - 130 10 0-25 <br /> Trichloroethene ND 50 50 100 49 98 65 - 130 2 0- 25 <br /> Page 9 of 12 notes <br /> I Alf concentration values contained herein are in ug/kg (ppb) <br />