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Laboratories Inc. <br /> Environmental Testing Laboratory Since 1949 <br /> CB&I Reported: 08/12/2013 15:10 <br /> 180 Promenade Circle,Suite 320 Project: North County LF,SJ County <br /> Sacramento,CA 95834 Project Number. 149270 <br /> Project Manager: Sheila Richgels <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent Lab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br /> QC Batch ID: BWG2209 <br /> Benzene BWG2209-BS1 LCS 23.420 25.000 ug/L 93.7 70-130 <br /> Bromodichloromethane BWG2209-BS1 LCS 26.800 25.000 ug/L 107 70-130 <br /> Chlorobenzene BWG2209-BS1 LCS 24.430 25.000 ug/L 97.7 70-130 <br /> Chloroethane BWG2209-BS1 LCS 24.600 25.000 ug/L 98.4 70-130 <br /> 1,4-Dichlorobenzene BWG2209-BS1 LCS 26.210 25.000 ug/L 105 70-130 <br /> 1,1-Dichloroethane BWG2209-BS1 LCS 24.060 25.000 ug/L 96.2 70-130 <br /> 1,1-Dichloroethene BWG2209-BS1 LCS 24.960 25.000 ug/L 99.8 70-130 <br /> Toluene BWG2209-BSI LCS 24.410 25.000 ug/L 97.6 70-130 <br /> Trichloroethene BWG2209-BS1 LCS 26.400 25.000 ug/L 106 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BWG2209-BS1 LCS 10.470 10.000 ug/L 105 75-125 <br /> Toluene-d8(Surrogate) BWG2209-BS1 LCS 10.240 10.000 ug/L 102 80-120 <br /> 4-Bromofluorobenzene(Surrogate) BWG2209-BS1 LCS 10.330 10.000 ug/L 103 80-120 <br /> The results in this report apply to the samples analyzed in accordance with the chain of custody document.This analytical report must be reproduced in its entirety. <br /> All results listed in this report are for the exclusive use of the submitting party.BC Laboratories,Inc.assumes no responsibility for report alteration,separation,detachment or third party interpretation- <br /> 4100 Atlas Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 www.bclabs.com Page 31 of 36 <br />