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Calsclence Environmental 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 11 <br /> Date(s) QC Analyzed: 07/10/92 Date Reviewed: 1-i1192 <br /> Page 7 of 12 <br /> Matrix Spike and Spike Replicate Results <br /> [Spike] Replicate Control Lima Control Limit <br /> Analyte f5amplel Added [Matrix 5pikel %REC IMatrix S ike %REC %REC %RPD %RPD <br /> Benzene ND 50 52 104 50 100 65 - 130 4 0- 25 <br /> Chlorobenzene ND 50 57 114 55 110 70 - 130 4 0- 25 <br /> Toluene 2 50 56 108 56 108 70 - 130 0 0- 25 <br /> 1,1-Dichloroethene ND 50 48 96 44 88 65 - 130 9 0- 25 <br /> I <br /> Trichloroethene ND 50 57 114 55 110 65 - 130 4 0- 25 <br /> Page 7 of 12 notes <br /> 1 All concentration values Contained herein are in ug/kg (ppb) <br />