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819 Sinker Ave Ste <br /> Sequoia Sacramento CA 958344 <br /> a— ) (916)921 9600 <br /> qW Analytical FAX(916)921-0too <br /> www sequaialabs cam <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 /> Blank(2120389-BLKI) Prepared&Analyzed 12/22/02 <br /> Purgeabie Hydrocarbons ND 50 ugll <br /> Surrogate a a a Triuorotoluene 830 100 83 60-140 <br /> Blank(2120389-BLKZ) Prepared&Analyzed 12/24/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Surrogate a a a-Trifluorotoluene 116 100 116 60-140 <br /> Blank(2120389-BLK3) Prepared&Analyzed 12/26/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Sun agate a a a Trifluorotoluene 112 " 100 112 60-140 . <br /> Laboratory Control Sample(2120389-BSI) Prepared&Analyzed 12/22/02 <br /> Purgeable Hydrocarbons 259 50 ug/l 250 104 70-130 <br /> Surrogate a a a-Trifluorotoluene 987 too 99 60-140 <br /> Laboratory Control Sample(2120389-BS2) Prepared&Analyzed 12/24/02 <br /> Purgeable Hydrocarbons 264 50 ug/i 250 106 70-130 <br /> Surrogate a a a Tr)2uorotoluene 135 loo 135 60-140 <br /> Laboratory Control Sample(2120389-BS3) Prepared&Analyzed 12/26/02 <br /> Purgeable Hydrocarbons 241 SO ugll 250 96 70-130 <br /> Surrogate a a a Trifluorotokiene 124 too 124 60-140 <br /> Laboratory Control Sample Dup(2120389-BSDI) Prepared 12/22/02 Analyzed 12/23/02 <br /> Purgeable Hydrocarbons 265 50 ug/1 250 106 70 130 2 25 <br /> Surrogate a a a Trafluorotoluene 102 " too 102 60 140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are i eported on a wet weight basis . <br /> This analytical report must be reproduced in its entirety <br /> Page 5 of 10 <br />