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DATA QUALITY CONTROL REVIEW Geosyntec Consultants <br /> REVIEWER: R.Dominguez Review date: 12-4-13 <br /> PROJECT/PHASE/TASK NO.:SAC139 <br /> Site: Nestle Manteca Sample date: 11/21/13 <br /> Laboratory report or WO#:720-53958-1 Report date: 12/3/13 <br /> Answer all questions"Yes"or"No."Any answer in a box requires comment(e.g.,explanation, <br /> reference to laboratory narrative and/or identification ofquolifiers for data tables). <br /> Review Item Yes No Comments <br /> All data requested received: x <br /> All analytes within holding times: x <br /> Compounds detected below reporting limits: x <br /> Minimum 1 surrogate within control for each sample: x <br /> Detection limits elevated by greater than 10X: �X All soil samples analyzed for herbicides. Also in samples <br /> GW-GSB2(chloride,nitrate as N,sulfate),GW-GSB3 <br /> (chloride and sulfate),and D-20131121-01(chloride and <br /> sulfate). <br /> Detection limits above screening levels: I�J Nitrite as N analyses for samples GW-GSB2,GW-GSB3,& <br /> D-20131121 detection limits exceeded screening level of <br /> 1 mg/L. Results were not reported above the detection <br /> limit. <br /> Matrix spike(MS)/matrix spike duplicate(MSD) <br /> within recovery control limits(%): �x The MS%recovery for herbicides batch 91363 exceeded <br /> • control limits for 2,4-D and 2,4,5-T and the MSD% <br /> exceeded control limits for 2,4-D.The MS/MSD recovery <br /> and/or RPD for chlorine batch 148839 exceeded control <br /> limits and the MS/MSD results for sulfate exceeded the <br /> calibration range.However,the corresponding LCS met <br /> acceptance criteria. <br /> Relative percent difference(RPD)within control <br /> limits based on MS/MSD results: x <br /> Laboratory check sample(LCS)within control limits: x <br /> Continuing calibration verification(CCV)within <br /> control limits: NA <br /> Chemicals detected above reporting limits in field, <br /> equipment,travel,or laboratory blank samples: �X Barium and sodium detected above RL in EB-20131121-01. <br /> Sample concentrations greater than 10x the equipment <br /> blank concentration were not qualified. <br /> Volatile analysis container(s)free of headspace X <br /> Laboratory corrective actions implemented: The%RPD between the primary and confirmation columns is>40%for sample <br /> SS-GSB4-4-4.5-20131121(720-53958). Due to the coelution of a non-target peak, <br /> the lower value has been reported instead of the higher value for DDD. <br /> Are data acceptable quality(if"No,"note qualifiers <br /> for data tables in"Comments"): x <br /> Additional notes to Project Manager <br /> RETURN THIS SHEET TO TASK MANAGER WHEN COMPLETE <br /> \\Sacramento-01\data\Projects\SAC139 Nestle_Manteca\500 Technical\510 Lab Analytical\512 QAQC\Lab QAQC checldist.xls <br />