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' 110 2nd Avenue South HD7 Pacheco CA 94553-5560 <br /> -&—my,bell Analytical Inc Telephone 925-798-1620 Fax 925-798-1622 <br /> Ihttp Ilwww mccampbell com E-mail main@mccampbell com <br /> QC SUMMARY REPORT FOR SW8260B <br /> BatchlD 2025 Matrix W WorkOrder 0205329 <br />' EPA Method SW8260B Extraction SW5030B Ext Date 5/23102 Spiked Sample ID N/A <br /> Sample <br /> Compound Spiked MS" MSD" MS-MSD* LCS LCSD LCS-LCSD Acceptance Criteria(%) <br />' <br /> Ng/L 11g/L %Rec % Rec %RPD °k Rec %Rec %RPD Low High <br /> Dusopropyl ether(D1PE) N/A 10 N/A N/A N/A 115 117 095 70 130 <br />' Ethyl tert-butyl ether(ETRE) N/A 10 N/A N/A NIA 115 115 121 70 130 <br /> Methyl-t-butyl ether(MTBE) N/A 10 N/A N/A N/A 113 112 034 70 130 <br /> cert-Amyl methyl ether(TAME) N/A 10 N/A N/A N/A 112 112 038 70 130 <br />' 0/oS5 N/A 10 N/A N/A NIA 105 104 10 70 130 <br /> All target compounds in the Method Blank of this extraction batch were ND less than the method RL with the following exceptions <br />' NONE <br /> I <br /> I <br /> MS=Matrix Spike MSD=Matrix Spike Duplicate,LCS=Laboratory Control Sample LCSD=Laboratory Control Sample Duplicate RPD=Relative Percent <br />' Deviation <br /> N/A=not enough sample to perform matrix spike,or analyte concentration in sample exceeds spike amount <br />' %Recovery=100'(MS-Sample)/(Amount Spiked),RPD=100"(MS—MSD)I(MS+MSD)'2 <br /> MS and I or MSD spike recoveries may not be near 100%or the RPDs near 0%if a)the sample is inhomogenous AN contains significant concentrations of <br /> analyte relative to the amount spiked or b)if that specific sample matrix interferes with spike recovery <br />' Laboratory extraction solvents such as methylene chloride and acetone may occasionally appear in the method blank at low levels <br />