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4D Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> qQF Analytical (707) 792-1865 <br /> fAX(707) 792-0342 <br /> ATC Associates,Inc Project Diesel Performance Sampled 412199 <br /> 117 Lone Palm Ave,Suite B Project Number 62577 001 Received 4/5/99 <br /> Modesto,CA 95351 Project Manager Jeanne Homse Reported 5/11199 <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 Anal ed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9040340 Date Prepared 4/14199 Extraction Method EPA 5030 waters <br /> Blank 9040340-BLK1 <br /> Gasoline 4/14/99 <br /> Benzene ND ug/1 500 <br /> ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a a-Tris luorotoluene 300 283 9 <br /> Surrogate 4-Bromofluorobenzene 43 <br /> 300 302 4 <br /> 01 <br /> LCS 9040340-BSI <br /> Benzene 4114199 100 959 ug/1 95 9 <br /> Toluene 100 <br /> 956 95 6 <br /> Ethylbenzene " 100 913 to 913 <br /> Al&lenes(total) 300 288 96 0 <br /> rogate a,a a-Trifluorotoluene 300 291 970 <br /> Matrix Soike 9040340-MSI P904098-07 <br /> Benzene 4/14/99 100 ND 948 ug/1 94 8 <br /> Toluene 100 ND 941 941 <br /> Ethylbenzene 100 ND 900 900 <br /> _Xylenes(total) 300 ND 280 933 <br /> Surrogate aa a-Trifluorotoluene 300 285 950 <br /> Matnx Spike Du 9040340-MSD1 P904098-07 <br /> Benzene 4/14/99 100 ND 931 ug/l 931 181 <br /> Toluene 100 ND 920 920 226 <br /> Ethylbenzene 100 ND 873 87 3 3 05 <br /> Xylenes(total) 300 ND 274 913 217 <br /> Surrogate a,a,a-Trtfluorotoluene 300 280 93 3 <br /> Sequoia Analytical-Petaluma '"Refer to end of report for text of notes and definitions <br /> Page 5 of 9 <br />