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819 Striker Avenue Suite 8 <br /> Sequoia <br /> a Sacramento, 9Z 95834 <br /> 9600 <br /> �j lJl 1 (gib) 9z1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Protect Arco 2130,Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 09/26/01 17 10 <br /> BTEX by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/aREC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090238-EPA 5030B JP/T) <br /> Matrix Spike(1090238-MSI) _ Source S109209-01 Prepared&Analyzed 09/24/01 <br /> Benzene 524 20 ug/l 500 ND 105 70-130 <br /> Toluene 507 20 500 ND 101 70-130 <br /> Methyl tert-butyl ether 524 20 500 ND 105 60-140 <br /> Surrogate 1 2-DCA-d4 � 494 500 98S 60-140 <br /> Surrogate Toluene d8 513 500 103 60-140 <br /> Surrogate 12-DCA-d4 494 506 988 60-140 <br /> Surrogate 4-BF2 485 500 970 60-140 <br /> Matrix Spike Dup(1090238-MSDI) _ Source 5109209-01 Prepared&Analyzed 09/24/01 _ <br /> Benzene 52 7 20 ug/l 500 ND 105 70-130 0 571 25 <br /> Wluene 52 1 20 500 ND 103 70-130 272 25 <br /> tbyl tert-butyl ether 493 20 _ 500 ND986 60-140 6 10 25 <br /> Surrogate 12-DCA-d4 497 300 994 60-140 <br /> Surrogate Toluene d8 530 500 106 60-140 <br /> Surrogate 12-DCA-d4 497 500 994 60-140 <br /> Surrogate 4-BFB 482 500 964 60-140 <br /> I <br /> i <br /> i <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of l 1 <br />