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Laboratories Inc. % <br /> Environmental Testing Laboratory Since 1949 <br /> San Joaquin County Solid Waste Project: WATER SAMPLES Reported: 07/27/2009 17:00 <br /> P 0 Box 1810 Project Number: [none] <br /> Stockton, CA 95201 Project Manager: Michael Carroll <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recovery RPD Recovery RPD Lab Quals <br /> Benzene BSG1300 BSG1300-BSI LCS 22.620 25.000 0.50 ug/L 90.5 70-130 <br /> Bromodichloromethane BSG1300 BSG1300-BS1 LCS 27.380 25.000 0.50 ug/L 110 70-130 <br /> Chlorobenzene BSG1300 BSGI300-BSI LCS 25.590 25.000 0.50 ug/L 102 70-130 <br /> Chloroethane BSG1300 BSG1300-BSI LCS 24.260 25 000 0.50 ug/L 97.0 70-130 <br /> 1,4-Dichlorobenzene BSG1300 BSG1300-BS1 LCS 25.840 25.000 0.50 ug/L 103 70-130 <br /> 1,1-Dichloroethane BSG1300 BSG1300-BS1 LCS 20.740 25.000 0.50 ug/L 83.0 70-130 <br /> 1,1-Dichloroethene BSG1300 BSG1300-BS1 LCS 26.360 25.000 0.50 ug/L 105 70-130 <br /> Toluene BSG1300 BSG1300-BSI LCS 24-530 25.000 0.50 ug/L 98.1 70-130 <br /> Trichloroethene BSG1300 BSG1300-BS1 LCS 25.020 25.000 0.50 ug/L 100 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSG1300 BSG1300-BSI LCS 10.780 10.000 ug/L 108 76-114 <br /> Toluene-d8(Surrogate) BSG1300 BSG1300-BS1 LCS 9.8600 10.000 ug/L 98.6 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BSG1300 BSG1300-BS1 LCS 9.8600 10.000 ug/L 98.6 86-115 <br /> The results in this report apply to the samples analyzed in accordance with the chain q/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 parry. 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 7 of <br /> Certifications: California-ELAP Certification Number 11 B6; Nevada Administrative Code-NAC-445A <br />