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Levine- nc 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 5 of 8 <br /> Lincoln Center, Stockton, California <br /> Criteria' <br /> Groundwater from Treatment System <br /> Method QC Issue MW/PIPP Sampling Monitoring Comments <br /> Total Lead in Matrix Spike(% Recovery) N/A 75 - 125% Total lead <br /> Groundwater Matrix Spike (% Difference) N/A 20% Total lead <br /> 6010/7000 Laboratory and Duplicative Control Samples N/A SO- 120% <br /> Total lead <br /> (% Recovery) <br /> Laboratory and Duplicative Control Samples N/A 20% Total lead <br /> (Relative % Difference) <br /> Sensitivity (MDL) N/A 5 ftg/I Total lead <br /> VOCs in Soil, Initial Calibration > 0.1 (RRF) N/A Chloromethane <br /> EPA 8260A' <br /> (Relative Response Factor[RRF] and %RSD) >0.1 1,1-Dichloroethane <br /> >0.1 Bromoform <br /> >0.3 Chlorobenzene • <br /> >0.3 1,1,2,2-Tetrachloroethane <br /> +/- 15% If 80% of the analytes are less than +/- 15% RSD, then <br /> the average response factor from the curve is used for <br /> quantitation of all analytes. If more than 20% of the <br /> analytes are greater than +/- 15% RSD, a linear <br /> regression curve is used for quantitation of all analytes. <br /> Method specified BFB criteria must also be met. <br /> RIFS-QAPP-TBLC-4-REV604111:SRL Page 5 of 8 10/15/98 <br />