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Laboratories Inc. � ll' <br /> Environmental Testing Laboratory Since 1949 <br /> Ground Zero Analysis,Inc. Reported: 05/01/2013 14:26 <br /> 1172 Kansas Avenue Project: Groundwater Samples(Del Tech) <br /> Modesto,CA 95354 Project Number: 425.2 <br /> Project Manager: Andrew Dorn <br /> Volatile Organic Analysis (EPA Method 8260) <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent PercentLab <br /> Constituent QC Sample ID Type Result Level Units Recovery RPD Recovery RPD LQ Is <br /> QC Batch to: BWD2270 <br /> Benzene BWD2270-BS1 LCS 23.840 25.000 ug/L 95.4 70-130 <br /> Toluene BWD2270-BS1 LCS 24.750 25.000 ug/L 99.0 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BWD2270-13SI LCS 9.7100 10.000 ugll. 97.1 75-125 <br /> Toluene-d8(Surrogate) BWD2270-BSI LCS 10.330 10.000 ug/L 103 80-120 <br /> 4-Bromolluorobeazene(Surrogale) BW02270-BSI LCS 9.4700 10.000 ugll- 94.7 80-120 <br /> QC Batch ID: BWD2374 <br /> Benzene BW02374-BS1 LCS 25.170 25.000 ug/L 101 70-130 <br /> ..—------------- <br /> . .._ _....._ .. _._-... <br /> Toluene BWD2374-BSI LCS 25.980 25.000 ugA- 104 70-130 <br /> 1,2-Dichloroethane-d4(Surrogate) BWD2374-BS1 LCS 9.8900 10.000 ugll 98.9 75-125 <br /> Toluene-dB(Surrogate) BW02374-BS1 LCS 10.270 10.000 ug/L 103 80-120 <br /> 4-BromoOuorobenzene(Surrogate) BWD2374-BSI LCS 9.2400 10.000 ug/L 92.4 80-120 <br /> The n Idu in rlrb report apply ro rlm saulplas aeulyzed in ucrm-daeae u*h Ibe rhuia ofnelody daaumHa.Tbis unnlylirul myon muss be reproduced m hr Hainer,. <br /> All results lismd in Ibis mlwn am For the exchisive use orris suEnnui,parry. aC Labonaluder.Inc.msnncam,respomilality rmmpon almmliw.rcpprmim.dauchnsnmrrhiN Party imemnwliun. <br /> 4100 Alias Court Bakersfield,CA 93308 (661)327-4911 FAX(661)327-1918 wwrv.bclabs.com Page 20 of 22 <br />