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1 S 19 Su iker Ave Ste S <br /> DSequoia Sacramento CA 21 9604 <br /> * (916)421 9600 <br /> Analytical FAX(916)921 0 10 <br /> vvwv sequmalabs com <br /> Gettler-Ryan-Petaluma Project Former Tosco 6981, Stockton,CA 5212553 <br /> 1364 N McDowell Blvd Ste B2 Project Number NIA Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 01/08/03 17 07 <br /> Total Purgeable Hydrocarbons by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2120389-EPA 5030B (PIT <br /> Matrix Spike(2120389-MS1) Source 5212500-02 Prepared&Analyzed 12/24/02 <br /> Purgeable Hydrocarbons 264 50 ug/l 250 ND 106 60-140 <br /> Surrogate a a a-Trifluorololuene 127 100 127 60-140 <br /> Matrix Spike Dup(2120389-MSD1) Source 5212500-02 Prepared&Analyzed 12/24/02 <br /> Purgeable Hydrocarbons 250 50 ug/l 250 ND 100 60 140 5 25 <br /> Surrogate a a a-Trifluorotoluene 125 100 125 60 140 <br /> I • <br /> Sequoia Analytical-Sacramento The results in this i eport apply to the samples onalvzed in accoi dance with the chain of <br /> . custody document Unless otherx rse stated results are reported on a wet weight basis <br /> This analwical report must be reproduced in its entirety <br /> Page 6 of 10 <br />