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Sequoia <br /> 819 r Avenue,S 8 <br /> 1 Sacramento CA 95858 34 <br /> (916)921-9604 <br /> Analytical FAX 921-0100 <br /> i. w�n+w sequeRuota[abs wm <br /> Delta Environmental Consultants(Cameron Park) Project Arco 2130, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Pro3ec Number NIA Reported <br /> Cameron Park CA,95682 Project Manager .lay Johnson 09/26/01 17 10 <br /> BTEX by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RF-C Limits RPD Limit Notes <br /> Batch 1090217-EPA 5030B [P/TI <br /> Matrix Sptk_e Dup(1(090217-MSD1) Source S109161-01 Prepared&Analyzed 09/21/01 <br /> 13enzene 434 20 ug/l 500 ND 949 76-130 205 25 <br /> Toluene 433 20 500 ND 966 70-I30 3 18 25 <br /> Methyl tert-butyl ether 395 20 500 ND 790 60-140 446 25 <br /> Surrogate 12 DCA d4 402 Soo 804 60-140 <br /> Surrogate Toluene d8 459 -)00 918 60-140 <br /> Surrogate 1 2-DCA d4 402 500 604 60-140 <br /> Surrogate 4-BF8 38 7 500 774 60-140 <br /> Batch 1090238-EPA 503013 JP/T7 <br /> lank(1090238-BL_K1)__ _ __ _ Prepared&Analyzed 09/24/01 _ <br /> nzene � � ND 2 D uglf <br /> e t_butyl alcohol ND 200 " <br /> Toluene ND 20 " <br /> Ethylbenzene ND 2 0 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Di-isopropyl ether ND 2 0 " <br /> Xylenes(total) ND 2 0 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Ethanol ND 3000 " <br /> Surrogate 1 2 DCA d4 460 A 0 920 60-140 <br /> Surrogate Toluene d8 53 0 50 0 106 60-140 <br /> Surrogate 12-DCA d4 460 500 92 0 60-140 <br /> Surrogate 4-BFB 502 500 100 60-140 <br /> LCS(1090238-BSI) Prepared&Analyzed 09/24/01 <br /> Benzene 54 2 2 0 UR Soo 108 70-130 <br /> Toluene 52 4 20 500 105 70-130 <br /> Methyl tert-butyl ether 54 0 2 0 50 0 108 60-140 <br /> Surrogate 12 DCA d4 _ 49 0 500 98 0 60-140 <br /> Surrogate Toluene-d8 52 6 500 105 60-140 <br /> Surrogate 1 2 DCA-d4 490 500 98 0 60-140 <br /> Surrogate 4-BF8 503 500 101 60-140 <br /> �—quola 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 8 of 1 1 <br />