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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> Analytical (707) 792-1865 <br /> FAX(707) 792-0342 <br /> ATC Associates,Inc Project Diesel Performance Sampled 4/2/99 <br /> 1117 Lone Palm Ave,Suite B Project Number 62577 001 <br /> Modesto,CA 9535] Received 4/5/99 <br /> Pro ect Mana er Jeanne Hornsey Re orted 5111199 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Linut Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limt % Notes* <br /> Batch 9040282 Date Prepared 4113199 Extraction Method EPA 5030 waters <br /> Blank 9040282-BLKI <br /> Tert-amyl methyl ether 4/13/99 ND ug/1 100 <br /> Tert-butyl alcohol ND 200 <br /> Di-isopropyl ether ND 100 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> 1,2-Dichloroethane <br /> Ethanol ND 0 500 <br /> ND 140 <br /> Ethyl tert-butyl ether ND 1 00 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate Di bromofluoromethane 5 00 4 36 860-118 872 <br /> Surrogate 1,2-Drchloroethane-d4 11 500 406 80 0-120 81 2 <br /> Surrogate Toluene-d8 'I 500 451 88 0-110 90 2 <br /> Surrogate 4-Bromofluorobenzene 500 456 <br /> &,,k860-115 912 <br /> 9040282-BLK2 <br /> Tert-amyl methyl ether 4/14/99 ND ug/I 100 <br /> Tert-butyl alcohol ND 24 0 <br /> Di-isopropyl ether ND 1 00 <br /> 1,2-Dibromoethane(EDB) ND 0 500 <br /> 1,2-Dichloroethane <br /> Ethanol ND 0 500 <br /> ND 100 <br /> Ethyl tert-butyl ether " ND 100 <br /> Methyl tert-butyl ether ND 0 500 <br /> Surrogate Dibromofluoromethane 500 497 <br /> Surrogate 1 2-Drchloroethane-d4 500 499 86 <br /> Surrogate Toluene-d8 500 525 860-11$ 99 4 0-110 998 <br /> 88 0-110 105 <br /> Surrogate 4-Bromofluorobenzene 500 527 860-115 105 <br /> LCS 9040282-BS1 <br /> Methyl tert-butyl ether 4/13/99 5 00 4 61 ug/I 727-119 922 <br /> Surrogate Dibromofluoromethane 500 4 76 860-118 95 2 <br /> Surrogate 1,2-Drchloroethane-d4 500 449 800-120 898 <br /> Surrogate Toluene-0 500 4 61 880-110 92 2 <br /> Surrogate 4-Bromofluorobenzene 500 4 68 860-115 936 <br /> LCS 9040282-BS2 <br /> Methyl tert-butyl ether 4/14/99 5 00 546 ug/I 727-119 109 <br /> Surrogate Dibromofluoromethane 500 505 11 860-118 101 <br /> Surrogate 12-Drchloroethane-d4 It 500 517 IF 800-120 103 <br /> Surrogate Toluene-d8 If 500 528 880-110 106 <br /> -6agate 4-Bromofluorobenzene N 500 526 860-115 105 <br /> Sequoia Analytical-Petaluma *Refer to end of report far text of notes and definitions <br /> Da Page 7 of 9 <br />