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Sequoia 1455 McDowell <br /> Petaluma <br /> North Ste <br /> Petaluma CA 949544 <br /> Analytical fAX <br /> 15) (707) 792 1865 <br /> (707) 792-0342 <br /> Project Unocal/Tosco Sampled 4/14/99 <br /> f"gital Dr Suite 6 Project Number Tosco SS#5886/205503TS Received 4/15/99 <br /> Novato,CA 94949 Project Manager Glenn Mattuecci Reported 5/12199 <br /> I <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> itlyte Analyzed Level Result Result Units Recov Linuts % Linut % Notes' <br /> ch 9040597 Date Prepared 4124199 Extraction Method EPA 5030 waters <br /> nk 9040597-BL K 1 <br /> amyl methyl ether 4124199 ND ug/I 1 00 <br /> Tert-butyl alcohol ND 20 0 <br /> isopropyl ether ND l 00 <br /> Dibromoethane(EDB) ND 0 500 <br /> 1,2-Dichloroethane ND 0 500 <br /> anol ND 100 <br /> yl tert-butyl ether ND 100 <br /> _ hyl tent-butyl ether ND 0 500 <br /> Surrogate Dtbrontofluoromethane S 00 465 860-118 93 0 <br /> rogate 1 2-Dcchloroethane-d4 /I 500 442 " 800-120 884 <br /> rogate Toluene-d8 500 485 880-110 970 <br /> Surrogate 4-Bromofluorobenzene 500 488 860-115 976 <br /> k 9040597-BLK2 <br /> _k <br /> my!methyl ether 4126199 ND ug/) 100 <br /> utyl alcohol ND 200 <br /> rDchloroetharie <br /> propyl ether ND 100 <br /> bromoethane(EDS) ND 0500 <br /> ND 0 500 <br /> Ethanol ND 100 <br /> lyl tert-butyl ether ND 100 <br /> thy[tert-butyl ether ND 0 500 <br /> Surrogate Dibromofluoromethane 500 4 73 860-118 946 <br /> rogate 1 2-Dcchloroethane-d4 500 464 800-120 918 <br /> jrogate Toluene-d8 Soo 480 880-110 960 <br /> rogate 4-Bromofluorobenzene 500 494 860-115 988 <br /> tt. <br /> 9040597-BSI <br /> yl tert-butyl ether 4/24/99 Soo 5 19 ug/1 727-119 104 <br /> Surrogate Dibromofluoromethane 5 00 496 860-118 991 <br /> rogate 1 2-Dcchloroethane-d4 500 485 800-120 970 <br /> rogate Toluene-d8 500 Soo ii 880-110 100 <br /> rogate 4-Bromofluorobenzene Soo 5 17 860-115 103 <br /> tS 9040597-BS2 <br /> thyl Cert-butyl ether 4126/99 500 487 ug/l 727-119 974 <br /> Surrogate Dibromofluoromethane 500 483 860-118 970 <br /> rogate 1 2-Dichloroethane-d4 500 472 800-120 944 <br /> rogate Toluene-d8 r 500 4 70 880-110 940 <br /> rogate 4-Bromofluorobenzene 500 485 860-115 970 <br /> ca Analytical-Petaluma 'Refer to end of report for text of notes and definitions <br /> Page 13 of 15 <br />