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Levine•Fric e•Recon <br /> Section: Table C-4 <br /> Date Initiated: September 23, 1996 <br /> Revision No.:6 <br /> Date Revised:October 16, 1998 <br /> Table C-4: Quanterra Method QC Criteria Page 3 of 8 <br /> Lincoln Center, Stockton, California <br /> Criteria' <br /> Groundwater from Treatment System <br /> Method QC Issue MW/PIPP Sampling Monitoring Comments <br /> VOCs in Laboratory and Duplicative Control Samples 79- 119% 65 - 135% 1,1-Dichloroethene <br /> Groundwater, (% Recovery) <br /> EPA 8260A2 74- 114 70- 130 Benzene <br /> 72- 112 70- 130 Trichloroethene <br /> 71 - 111 70- 130 Toluene <br /> 72- 112 70- 130 Chlorobenzene <br /> Laboratory and Duplicative Control Samples 12% 25% 1,1-Dichloroethene <br /> (Relative % Difference) <br /> 10 25 Benzene <br /> 13 25 Trichloroethene <br /> 10 25 Toluene <br /> 10 25 Chlorobenzene <br /> Field Duplicate Samples +/-30% +/- 30% Not applicable when detectable concentrations are • <br /> (Relative % Difference) reported for both replicates that are less than 10 x MDL. <br /> Not applicable when data are not detect. <br /> Sensitivity 0.5 to 5 jig/] 0.5 to 5µg/I MDLs will be analyte and matrix dependent. <br /> (MDL according to 40 CFR, Part 136, App B) <br /> RIFS-QAPP-TBLC-4-REV6041I I:SRL Page 3 of 8 11115/98 <br />