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I 10 2nd Avenue South #D7,Pacheco CA 94553-5560 <br /> 14 McCampbell Analytical Inc Telephone 925-798-1620 Fax 925-798-1622 <br /> http//vvwwiriccarnpbel1corn Email main i mecampbell corn <br /> QC SUMMARY REPORT FOR SW8O21B/8O15Cm <br /> BatchlD 1312 Matrix W <br /> WorkOrder 0204252 <br /> EPA Method SW8021 B18015Cm Extraction SW5030B Ext Date 4115/02 Spiked Sample ID 0204253-002A <br /> Compound 5ampte Amount Spiked MS MSD MS-MSD LCS LCSD I LCS-LCSD <br /> 1 Ng/L pg/L %Rec %Rec %RPD %Rec %Rec %RPD <br /> TPH(gas) ND 60 113 101 108 104 101 397 <br /> MTBE ND 10 962 110 13 3 834 954 274 <br /> Benzene ND 10 104 -115 9 96 978 105 3 99 <br /> Toluene ND 10 108 114 5 70 104 112 3 93 <br />' Ethylbenzene ND 10 109 115 546 101 110 329 <br /> Xylenes ND 30 110 113 299 103 110 3 08 <br /> Surr %SS NA 10 101 105 300 104 108 197 <br /> All target compounds in the Method Blank ofthis extraction batch were ND less that the method RL with the following exceptions <br /> NONE <br /> i <br /> 1 <br /> 1 <br /> 1 <br /> 1 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 metrix spike or analyte concentration in sample exceeds spike amount <br /> t %Recovery=100"(MS-Sample)1(Amount Spiked) RPD=100`(MS—MSD)/(MS*MSD)'2 <br /> MS and/or MSD spike recoveries may not be near 100%or their BPDs 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 />' matnx 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 /> 1 <br />