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QC Sample Results <br /> Client: Geosyntec Consultants, Inc. Job ID: 320-51445-1 <br /> Project/Site: WR2501 Rough and Ready Island-Stockton <br /> Method: TO-15 - Volatile Organic Compounds in Ambient Air <br /> Lab Sample ID: MB 320-304622/10 Client Sample ID: Method Blank <br /> Matrix: Air Prep Type: Total/NA <br /> Analysis Batch: 304622 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> Benzene ND 1.3 0.25 ug/m3 06/29/19 21:14 1 <br /> Ethylbenzene ND 1.7 0.27 ug/m3 06/29/19 21:14 1 <br /> Toluene ND 1.5 0.19 ug/m3 06/29/19 21:14 1 <br /> m,p-Xylene ND 3.5 0.43 ug/m3 06/29/19 21:14 1 <br /> o-Xylene ND 1.7 0.23 ug/m3 06/29/19 21:14 1 <br /> Naphthalene ND 4.2 2.9 ug/m3 06/29/19 21:14 1 <br /> Gasoline Range Organics(C6-C12) ND 410 160 ug/m3 06/29/19 21:14 1 <br /> MB MB <br /> Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac <br /> 4-Bromofluorobenzene(Surr) 96 70-130 06/29/19 21:14 1 <br /> 1,2-Dichloroethane-d4(Surr) 102 70-130 06/29/19 21:14 1 <br /> Toluene-d8(Surr) 100 70-130 06/29/19 21:14 1 <br /> Lab Sample ID: LCS 320-304622/4 Client Sample ID: Lab Control Sample <br /> Matrix: Air Prep Type: Total/NA ❑ <br /> Analysis Batch: 304622 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Gasoline Range Organics 8180 8440 ug/m3 103 70-130 <br /> (C6-C12) <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 100 70-130 F71,2-Dichloroethane-d4(Surr) 100 70-130 <br /> Toluene-d8(Surr) 101 70-130 <br /> Lab Sample ID: LCS 320-304622/6 Client Sample ID: Lab Control Sample <br /> Matrix: Air Prep Type: Total/NA <br /> Analysis Batch: 304622 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Benzene 68.0 74.7 ug/m3 110 68-128 <br /> Ethylbenzene 91.6 98.8 ug/m3 108 64-124 <br /> Toluene 79.8 93.1 ug/m3 117 68-128 <br /> m,p-Xylene 183 191 ug/m3 104 65-125 <br /> o-Xylene 91.7 91.6 ug/m3 100 65-125 <br /> Naphthalene 109 104 ug/m3 96 50-147 <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 103 70-130 <br /> 1,2-Dichloroethane-d4(Surr) 97 70-130 <br /> Toluene-d8(Surr) 101 70-130 <br /> Eurofins TestAmerica, Sacramento <br /> Page 10 of 77 7/2/2019 <br />