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110 2nd Avenue South 4137 Pacheco CA 94553-5560 <br /> F4 <br /> McCampbell Analytical Inc Telephone 92$-798 1620 Fax 925-798-1622 <br /> hap//www mccampbell com E mail main@mecampbell com <br /> QC SUMMARY REPORT FOR SW8021B/8015Cm <br /> BatchlD 1302 Matrix W WorkOrder 0204252 <br /> i <br />' EPA Method SW8021 BI8015Cm Extraction SW5030B Ext Date 4115102 Spiked Sample ID 0204251-004A <br /> Sample Amount Spiked MS MSD MS-MSD LCS LCSD LCS-LCSD <br /> Compound <br /> Ng/L liglL %Rec l % Rec %RPD %Rec %Rec %RPD <br /> TPH(gas) ND 60 118 108 120 101 992 145 <br />' MTBE ND 10 99 1 93 —200 898 994 101 <br /> Benzene ND 10 996 i 95 9 105 100 101 0 782 <br /> TolueneND 10 105 983 200 108 108 0 163 <br /> Ethylbenzene ND 10 107 101 5 77 104 104 00165 <br /> Xylenes ND 30 110 103 4 96 103 107 3 17 <br /> Surr %SS NA 10 101 981 120 107 107 00947 <br /> Al[target compounds in the Method Blank of this extraction batch were ND less that the method RL with the following exceptions <br /> NONE <br /> 10 <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 /> NA=not enough sample to perform metnx spike or analyte concentration in sample exceeds spike amount <br /> 1 %Recovery=100'(MS Sample)1(Amount Spiked) RPD=100'(MS—MSD)1(MS+MSD).2 <br /> MS and 1 or MSD spike recoveries may not be near 100%or their RPDs near 0%if a)the sample is inhomogeneous AND contains significant concentrations of <br /> analyze relative to the amount spiked,or b)if that specific sample matrix interferes with spike recovery The LCS and LCSD are spikes into a clean known similar <br /> matrix and they and the surrogate standards reflect the overall validity of their extraction batch Our control limits are 70-130%recovery and 30%RPD for the LCS- <br /> LCSD and for the Surrogate Standards <br />