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r, <br /> Sequoia 1455 McDowell Bivd North Ste D <br /> Petaluma CA 94954 <br /> r• (707) 792-1865 <br /> Iwo Analytical FAX(707) 792-0342 <br /> i <br /> Blaine Tech/Chevron Project Chevron Sampled 12/16/99 <br /> 1680 Rogers Ave Project Number 2905 W Benjamin Holt Dr,Stockton Received 12/21/99 <br /> San Jose, CA 95112 Project Manager Scott Boor Reported 12/29/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Linuts % Limit % Notes* <br /> Batch 9120605 Date Prepared 12/26/99 Extraction Method EPA 5030 waters <br /> Blank 9120605-BLKI <br /> Gasoline 12/26/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xyienes(total) ND 0 500 <br /> _Methyl tert-butyl ether ND 2 50 <br /> Surrogate a a,a-Trtfluorotoluette 300 281 650-135 93 7 <br /> Surrogate 4-Bromofluorobenzene 300 301 650-135 100 <br /> LCS 9120605-BSI <br /> Benzene 12/26/99 100 996 ug/l 65 0-135 99 6 <br /> Toluene 106 95 3 65 0-135 953 <br /> Ethylbenzene 100 920 65 0-135 920 <br /> ®nes(total) _ 300 283 65 0-135 943 <br /> rogate a a a-Trtfluorotoluene 300 291 650-135 970 <br /> Matrix Spike 9120605-MSI P912550-02 <br /> Benzene 12/26/99 100 427 104 ug/l 65 0-135 997 <br /> Toluene 100 285 99 7 65 0-135 968 <br /> Ethylbenzene 100 27 1 117 65 0-135 899 <br /> Xylenes(total) 300 41 6 321 65 0-135 931 <br /> Surrogate a a a-Trtfluorotoluene 300 295 650-135 98 3 <br /> Matrix Spike Dup 9120605-MSD1 P912550-02 <br /> Benzene 12/26/99 100 427 105 ug/l 65 6-I35 101 200 130 <br /> Toluene 100 285 100 65 0-135 972 200 0 412 <br /> Ethylbenzene 100 27 1 117 65 0-135 899 200 0 <br /> Xylenes(total) 300 41 6 322 65 0-135 93 5 200 0 429 <br /> Surrogate a a a-Triuorotoluene 300 294 65 0-135 98 0 <br /> 'oia Analytical-Petaluma <br /> �'a yt Refer to end of report for text of notes and defrnettons <br /> Page 5 of 6 <br />