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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 O Box 1810 Project Number: [none] <br /> Stockton, CA 95201 Project Manager: Michael Carroll <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Precision & Accuracy <br /> Control Limits <br /> Source Source Spike Percent Percent <br /> Constituent Batch ID QC Sample Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Lab Quals <br /> Benzene BSG1300 Matrix Spike 0909359-02 ND 20.950 25.000 ug/L 83.8 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 22.480 25.000 ug/L 7.0 89.9 20 70-130 <br /> Bromodichloromethane BSG1300 Matrix Spike 0909359-02 ND 27.920 25.000 ug/L 112 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 27.620 25.000 ug/L 1.8 110 20 70-130 <br /> Chlorobenzene BSG1300 Matrix Spike 0909359-02 ND 26.190 25.000 ug/L 105 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 25.760 25.000 ug/L 1.9 103 20 70-130 <br /> Chloroethane BSG1300 Matrix Spike 0909359-02 ND 22.940 25.000 ug/L 91.8 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 24.780 25.000 ug/L 7.6 99.1 20 70-130 <br /> 1,4-Dichlorobenzene BSG1300 Matrix Spike 0909359-02 ND 27.370 25.000 ug/L 109 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 27.330 25.000 ug/L 0 109 20 70-130 <br /> 1,1-Dichloroethane BSG1300 Matrix Spike 0909359-02 ND 19.140 25.000 ug/L 76.6 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 20.180 25.000 ug/L 5.2 80.7 20 70-130 <br /> 1,1-Dichloroethene BSG1300 Matrix Spike 0909359-02 ND 25.280 25.000 ug/L 101 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 25.890 25.000 ug/L 2.9 104 20 70-130 <br /> Toluene BSG1300 Matrix Spike 0909359-02 ND 25.190 25.000 ug/L 101 70-130 <br /> Matrix Spike Duplicate 0909359-02 ND 25.100 25.000 ug/L 1.0 100 20 70-130 <br /> Trichloroethene BSG1300 Matrix Spike 0909359-02 21.140 45.810 25.000 ug/L 98.7 70-130 <br /> Matrix Spike Duplicate 0909359-02 21.140 46.070 25.000 ug/L 1.0 99.7 20 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BSG1300 Matrix Spike 0909359-02 ND 10.300 10.000 ug/L 103 76-114 <br /> Matrix Spike Duplicate 0909359-02 ND 10.270 10.000 ug/L 103 76-114 <br /> Toluene-d8(Surrogate) BSG1300 Matrix Spike 0909359-02 ND 10.240 10.000 ug/L 102 88-110 <br /> Matrix Spike Duplicate 0909359-02 ND 9.7300 10.000 ug/L 97.3 88-110 <br /> 4-Bromofluorobenzene(Surrogate) BSG1300 Matrix Spike 0909359-02 ND 10.320 10.000 ug/L 103 86-115 <br /> Matrix Spike Duplicate 0909359-02 ND 10.270 10.000 ug/L 103 86-115 <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 6 of <br /> Certifications: California-ELAP Certification Number 1186: Nevada Administrative Code-NAC-445A <br />