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E iesaeake Redwood dry, (650) 364-9600 FAX (650) 364-9233 <br /> sequoia 404 N. Wiget Lanea Walnut Creek, CAA 949459b (925) 986-9600 FAX (925) 988-9673 <br /> 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (916) 9ZI -9600 FAX (916) 921 -0100 <br /> (1) Analytical 1455 McDowell Blvd. North, Ste, D Petaluma, CA 94954 (707) 792-1865 FAX (707) 79Z-0342 <br /> qQF 1551 Industrial Road San Carlos, CA 94070-4111 (650) 232-9600 FAX (650) 232-9612 <br /> Gettler-Ryan - Sac Project: Chevron 9-3232, Stockton, CA Sampled: 5/5/99 to 5/6/99 <br /> 3164 Gold Camp Dr., Ste. 240 Project Number: 346463 .04 Received: 5/7/99 <br /> Rancho Cordova, CA 95670 Project Manager: Rick Fears Reported: 5/ 14, 19/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical - Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> i <br /> Batch : 9050173 Date Prepared: 5/14/99 Extraction Method: EPA 50308 (bleOHI <br /> Blank 9050173-BLKI <br /> Tert-butyl alcohol 5/14/99 ND mg/kg 10.0 <br /> Methyl tert-butyl ether IND it 0. 100 <br /> Di-isopropyl ether It ND it 0.100 <br /> Ethyl tert-butyl ether It ND 0.100 <br /> Tert-amyl methyl ether It ND 0.100 <br /> Ethanol it ND 150 <br /> Surrogate: 1,2-DCA-d4 if2.50 2.48 IF60. 0- 140 99. 2 <br /> LCS 9050173-BSI <br /> Methyl cert-butyl ether 5/14/99 2.50 2.56 mg/kg 70.0- 130 102 <br /> Surrogate. 1,2-DCA-d4 if2.50 2.53 of60. 0-140 101 <br /> Matrix Spike 9050173-MSI S90516541 <br /> Methyl Cert-butyl ether 5/ 14/99 2.50 ND 2.47 mg/kg 60. 0- 140 98.8 <br /> Surrogate: 1,2-DCA-d4 of 2. 50 2. 43 if60. 0-140 97.2 <br /> Matrix Spike Dup 9050173-MSDI 5905165-01 <br /> Methyl tert-butyl ether 5/14/99 2.50 ND 2.33 mg/kg 60.0- 140 93.2 25 .0 5.83 <br /> Surrogate. 1,2-DCA-d4 to2. 50 2.42 to60. 0-140 96.8 <br /> I <br /> Batch : 9050176 Date Prepared: 5/17/99 Extraction Method: EPA 5030B (MeOHI <br /> Blank 9050176-BLKI <br /> Tert-butyl alcohol 5/17/99 ND mg/kg 10.0 <br /> Methyl tert-butyl ether It ND " 0.100 <br /> Di-isopropyl ether ND " 0. 100 <br /> Ethyl tert-butyl ether ND " 0.100 <br /> Tert-amyl methyl ether ND it 0.100 <br /> Ethanol ND " 150 <br /> Surrogate: 1,2-DCA-d4 if2.50 2. 60 If60. 0-140 104 <br /> US 9050176-BSI <br /> Methyl tert-butyl ether 5/ 17/99 2.50 2.56 mg/kg 70.0- 130 102 <br /> Surrogate: 1, 2-DCA -d4 if2.50 2. 57 it 60. 0-140 103 <br /> Matrix Spike 9050176-MSI 5905211 -01 <br /> Methyl tert-butyl ether 5/ 17/99 2.50 ND 2.42 mg/kg 60.0- 140 96.8 <br /> Surrogate. 1,2-DCA-d4 if 2. 50 2.39 IF 60. 0-140 95. 6 <br /> Matrix Spike Dun 9050176-MSDI 5905211 -01 <br /> Methyl tert-butyl ether 5/17/99 2.50 ND 2.37 mg/kg 60.0- 140 94.8 25 .0 2.09 <br /> Sequoia Ann-a�ly�ti,cfal7- Sacramento *Refer to end ojreport for text oJnotes and definitions. <br /> Sandra R. Hanson, Client Services Representative Page 13 of 15 <br /> i <br />