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' Sequoia 814 SenAve Ste 8 <br /> Sacramento to CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916)92]-0100 <br /> www sequoialabs com <br /> ettter-Ryan-Dublin Project Former Unocal 5098,Stockton,CA <br /> 6747 Sierra Court,Ste I S308091 <br /> Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 08/20/03 16 56 <br /> GasohnelBTEXIOxygenates by EPA method 82608 - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> inalym Result Limit Units Level Result %REC Limas RPD Limn Notes <br /> Batch 30$0240-EPA 5030B JP/TJ <br /> Uoratory Control Sam le(3080240-BS1) Prepared 08/18Analyzed 8/19/03 <br /> ene 254 050 ug/l 250 102 70-130 <br /> Toluene 243 050 25 0 <br /> ethyl tert-butyl ether 97 70-130 <br /> 252 20 25 0 101 60-140 <br /> rrogate 12-DCA-d4 254 2-50 <br /> Surrogate 7oluene-d8 102 60-140 <br /> 24 8 250 99 60-140 <br /> J�boratory <br /> rogate 4-BFB 25 8 <br /> 250 <br /> 103 60-140 <br /> Control Sample Du (3080240-BSD1} Prepared 08/18/03 Analyzed 08/19/03 j <br /> Benzene 257 <br /> 050 ug/l 250 103 70-130 � 1 25 <br /> luene 23 7 050 25 0 <br /> 95 70-130 2 25 <br /> ethyl tert-butvl ether 276 2 0 250 110 60-140 9 25 <br /> Surrogate 12-DC,4-d4 26 7 250 <br /> 107 60-140 <br /> Ioate Toluene-d8 241 250 96 60-140 <br /> ate 4-BFB 275 250 110 60-140 <br /> 't"x Spike Dup(3080240-MSD]) Source 5308115-01 Prepared 08/18/03 Analyzed 08/19/03 <br /> QM-09 <br /> 260 050 ug/I 25 0 ND 104 70-130 25 <br /> inzene <br /> acne248 050 250 ND 99 70-130thyl tett-butyl ether 25 <br /> 26 7 20 25 0 ND 107 60-140 25 <br /> Surrogate 12-DC,4-d4 258 250 103 60-140 <br /> rugate Toluene-d8 250 250 100 60 140 <br /> rogate 4-BFB 256 2-50 102 60 140 <br /> r <br /> nota AnaIytical- 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 reported on a wet weight basis <br /> This analytical i eport must be reproduced in its entirety <br /> Page 101 of 117 <br />