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10 2nd Avenue South,#137,Pacheco,CA 94553-5560 McCampbell Analytical, Inc. Telephone:925-798-1620 Fax:925-798-1622 Website:www.mccampbell.com Eanail:main a mccampbell.com QC SUMMARY REPORT FOR SW8021B/8015Cm Matrix: S WorkOrder: 0405449 EPA Method: SW8021 B/8015Cm Extraction: SW5030B Batch ID:11731 Spiked Sample ID: 0405448-001A Sample Spiked MS* r MSD'-'MS-MSD LCS LCSD LCS-LCSD Acceptance Criteria(%) mg/Kg mg/Kg %Rec. %Rec. %RPD %Ree. %Rec. %RPD Low High TPH(btex)£ ND 0.60 105 102 1 2.87 104 103 0.934 70 130 MTBE ND 010 112 9 6.5 1 14.7 107 101 i 5.42 70 130 Benzene ND 0.10 106 108 2.57 112 105 6.37 70 130 Toluene ND 0.10 90.4 91.4 1.05 94.2 88.7 5.94 70 130 Ethylbenzene ND 0.10 108 I10 2.64 113 107 5.36 70 130 - -- - ---- ----- --,.-..._.. - - - .......... Xylenes - - - Xylenes ND 0.30 96.3 100 3.74 100 96.3, 3.74 70 130 %SS: 86.6 : 0.10 89.4 83.1 7.30 95.2 93.3 2.02 70 130 All target compounds in the Method Blank of this extraction batch were ND less than the method RL with the following exceptions: NONE MS=Matrix Spike;MSD=Matrix Spike Duplicate;LCS=Laboratory Control Sample;LCSD=Laboratory Control Sample Duplicate;RPD=Relative Percent Deviation. %Recovery=100*(MS-Sample)/(Amount Spiked);RPD=100*(MS- MSD)/((MS+MSD)12). *MS and/or MSD spike recoveries may not be near 100%or the RPDs near 0%if:a)the sample is inhomogenous AND contains significant concentrations of analyte relative to the amount spiked,or b)if that specific sample matrix interferes with spike recovery. £TPH(btex)=sum of BTEX areas from the FID. #cluttered chromatogram;sample peak coelutes with surrogate peak: N/A=not enough sample to perform matrix spike and matrix spike duplicate. NR=analyte concentration in sample exceeds spike amount for soil matrix or exceeds 2x spike amount for water matrix or sample diluted due to high matrix or analyte content. r DHS Certification No. 1644 �QA/QC Officer