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QC Sample Results C <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 (Continued) <br /> Lab Sample ID: LCSD 320-304928/7 Client Sample ID: Lab Control Sample Dup <br /> Matrix: Air Prep Type: Total/NA <br /> Analysis Batch: 304928 <br /> Spike LCSD LCSD %Rec. RPD <br /> Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Naphthalene 109 117 ug/m3 108 50-147 7 25 <br /> LCSD LCSD <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene(Surr) 104 70-130 <br /> 1,2-Dichloroethane-d4(Surr) 99 70-130 <br /> Toluene-d8(Surr) 100 70-130 <br /> Method: D1946 - Fixed Gases in Air (GC) <br /> Lab Sample ID: MB 320-303543/10 Client Sample ID: Method Blank <br /> Matrix: Air Prep Type: Total/NA <br /> Analysis Batch: 303543 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> Helium ND 0.10 0.028 %v/v 06/25/19 12:52 1 <br /> Lab Sample ID: LCS 320-303543/5 Client Sample ID: Lab Control Sample <br /> Matrix: Air Prep Type: Total/NA <br /> Analysis Batch: 303543 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Helium 19.9 19.3 %v/v 97 80-120 <br /> Lab Sample ID: LCSD 320-303543/6 Client Sample ID: Lab Control Sample Dup <br /> Matrix: Air Prep Type: Total/NA ❑ <br /> Analysis Batch: 303543 <br /> Spike LCSD LCSD %Rec. RPD <br /> Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Helium 19.9 19.2 %v/v 97 80-120 0 20 <br /> Eurofins TestAmerica, Sacramento <br /> Page 13 of 77 7/2/2019 <br />