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ENVIRONMENTAL e m= <br /> Analytical Chemists <br /> June 9, 2010 Lab ID : STKI033632 <br /> City of Lathrop Groundwater Monitoring Customer : 3-16663 <br /> Quality Control- Organic <br /> Constituent Method Date/1D Type Units Cone. QC Data DQO Note <br /> Organic <br /> 1,2-Dichloroethane-d4 5030B 05/05/2010:204491 Blank ug/L 25.00 105% 73-138 <br /> LCS ug/L 25.00 100% 73-138 <br /> MS ug/L 25.00 89.8% 73-163 <br /> (SP 1004015-001) MSD ug/L 25.00 102% 73-163 <br /> MSRPD u /L 0.000 12.8% <20.0 <br /> Bromofluorobenzene 5030B 05/05/2010:204491 Blank ug/L 25.00 101% 80-127 <br /> LCS ug/L 25.00 102% 80-127 <br /> MS ug/L 25.00 102% 88-114 <br /> (SP 1004015-001) MSD ug/L 25.00 99.5% 88-114 <br /> MSRPD ug/L 0.000 2.6% <20.0 <br /> romodichloromethane 5030B 05/05/2010:204491 Blank ug/L ND <0.5 <br /> romoform 5030B 05/05/2010:204491 Blank ug/L ND <1 <br /> Chloroform 5030B 05/05/2010:204491 Blank u /L ND <0.5 <br /> ibromochloromethane 5030B 05/05/2010:204491 Blank ug/L ND <1 <br /> ibromofluromethane 5030B 05/05/2010:204491 Blank ug/L 25.00 98.1% 68-148 <br /> LCS ug/L 25.00 96.4% 68-148 <br /> MS ug/L 25.00 92.5% 78-150 <br /> (SP 1004015-001) MSD ug/L 25.00 101% 78-150 <br /> MSRPD ug/L 0.000 8.7% <20.0 <br /> Toluene-d8 5030B 05/05/2010:204491 Blank ug/L 25.00 103% 75-118 <br /> LCS ug/L 25.00 103% 75-118 <br /> MS ug/L 25.00 102% 65-125 <br /> (SP 1004015-001) MSD ug/L 25.00 104% 65-125 <br /> MSRPD u /L 0.000 1.5% <20.0 <br /> 1,2-Dichloroethane-d4 8260B 05/05/2010:205365 CCV ug/L 25.00 99.8% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 100% 70-130 <br /> Bromofluorobenzene(BFB) 8260B 05/05/2010:205365 CCV ug/L 25.00 106% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 103% 70-130 <br /> romodichloromethane 8260B 05/05/2010:205365 CCV ug/L 25.00 102% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 94.3% 70-130 <br /> romoform 8260B 05/05/2010:205365 CCV ug/L 25.00 96.6% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 80.2% 70-130 <br /> Chloroform 8260B 05/05/2010:205365 CCV ug/L 25.00 107% 80-120 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 102% 80-120 <br /> ibromochloromethane 8260B 05/05/2010:205365 CCV ug/L 25.00 93.6% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 78.2% 70-130 <br /> ibromofluromethane 8260B 05/05/2010:205365 CCV ug/L 25.00 100% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 99.9% 70-130 <br /> Toluene-d8 8260B 05/05/2010:205365 CCV ug/L 25.00 100% 70-130 <br /> 8260B 05/07/2010:205393 CCV u /L 25.00 109% 70-130 <br /> Definition <br /> CCV :Continuing Calibration Verification-Analyzed to verify the instrument calibration is within criteria. <br /> Blank :Method Blank-Prepared to verify that the preparation process is not contributing contamination to the samples. <br /> LCS :Laboratory Control Standard/Sample-Prepared to verify that the preparation process is not affecting analyte recovery. <br /> MS Matrix Spikes-A random sample is spiked with a known amount of analyte.The recoveries are an indication of how that sample <br /> matrix affects analyte recovery. <br /> MSD :Matrix Spike Duplicate of MS/MSD pair-A random sample duplicate is spiked with a known amount of analyted.The recoveries <br /> are an indication of how that sample matrix affects analyte recovery. <br /> MSRPD :MS/MSD Relative Percent Difference(RPD)-The MS relative percent difference is an indication of precision for the preparation <br /> and analysis. <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> DQO :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Page 22 of 27 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Field Office <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue Visalia,California <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 TEL:559/734-9473 <br /> TEL:805/392-2000 TEL:209/942-0182 TEL:530/343-5818 Mobile:559/737-2399 <br /> FAX:805/525-4172 FAX:209/942-0423 FAX:530/343-3807 FAX:559/734-8435 <br /> CA NELAP Certification No.01110CA CA ELAP Certification No.1563 CA ELAP Certification No.2670 <br />