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s Chesapeake Drive Redwood City, CA S (650) 364-9600 FAX (650) 364-9233 <br /> ■/�� \� sequoia �- - N. Wiget Lane Walnut Creek, CA 94�,o (925) 988-9600 FAX (925) 988-9673 <br /> y 819 Striker Avenue, Suite 8 Sacramento. CA 95834 (916) 921 -9600 FAX (916) 921 -0100 <br /> Analytical 1455 McDowell Blvd. North, Ste. D Petaluma, CA 94954 (707) 792- 1865 FAX (707) 792-0342 <br /> 1551 Industrial Road San Carlos, CA 94070-4111 (650) 232-9600 FAX (650) 232-9612 <br /> Getter-Ryan - Sac Project: Chevron 9-3232, Stockton, CA Sampled: 5/28/99 <br /> 3164 Gold Camp Dr., Ste. 240 Project Number: 346463 .04 Received: 6/1 /99 <br /> Rancho Cordova, CA 95670 Project Manager: Rick Fears Reported: 6/15/99 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical - Sacramento <br /> Date Spike Sample QC Reporting Limit Recov, RPD RPD <br /> Analyte Analyzed Level Result Result Units Recent. Limits % Limit % Notes* <br /> Batch : 9060190 Date Prepared: 6/10199 Extraction Method: EPA 50308 (MeOH) <br /> Blank 9060190-BLKI <br /> Purgeable Hydrocarbons 6/10/99 ND mg/kg 1 .00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes (total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Surrogate: a,a,a-Triuorotoluene 0.200 0. 187 to 60. 0-140 93. 5 <br /> LCS 9060190-BSI <br /> Benzene 6/10/99 0.200 0.212 mg/kg 70.0- 130 106 <br /> Toluene to 0.200 0.228 to 70.0-130 114 <br /> Ethylbenzene It 0.200 0.229 " 70.0- 130 114 <br /> Xylenes (total) to 0.600 0.611 to 70.0-130 102 <br /> Methyl tert-butyl ether " 0.200 0.207 " 70.0- 130 103 <br /> Surrogate: a,a,a-Trifluorotoluene to0.200 0. 193 It 60.0-140 96.5 <br /> Matrix Spike 9060190-MS1 5906024-06 <br /> Benzene 6/10/99 0.200 ND 0. 193 mg/kg 60.0- 140 96.5 <br /> Toluene " 0.200 ND 0.206 " 60.0- 140 103 <br /> Ethylbenzene " 0.200 ND 0.206 to 60.0- 140 103 <br /> Xylenes (total) " 0.600 ND 0.555 to 60.0- 140 92.5 <br /> Methyl tert-butyl ether 0.200 ND 0. 196 to 60.0- 140 98.0 <br /> Surrogate: a,qa-Trj?uorotoluene It0.200 0. 184 " 60.0-140 92. 0 <br /> Matrix Spike a Dup 9060190-MSDI 5906024-06 <br /> Benzene 6/10/99 0.200 ND 0. 194 mg/kg 60.0- 140 97.0 25 .0 0.517 <br /> Toluene 110.200 ND 0.207 " 60.0- 140 103 25.0 0 <br /> Ethylbenzene It 0.200 ND 0.207 60.0- 140 103 25.0 0 <br /> Xylenes (total) 0.600 ND 0.559 60.0- 140 93.62 25.0 0.754 <br /> Methyl tert-butyl ether 0.200 ND 0.204 60.0- 140 102 25.0 4.00 <br /> Surrogate: a,ata-Trifluorotoluene It0.200 0. 184 60.0-140 92.0 <br /> Batch : 9060192 Date Prepared: 6/11/99 Extraction Method• FPA 5030B (MeOHI <br /> Blank 9060192-BLK1 <br /> Purgeable Hydrocarbons 6/11199 ND mg/kg 1 .00 <br /> Benzene itND " 0.00500 <br /> Toluene IfND " 0.00500 <br /> Ethylbenzene toND or 0.00500 <br /> Xylenes (total) IFND it 0.00500 <br /> Methyl tert-butyl ether ND it 0.0500 <br /> Sequoia Analytical - Sacramento *Refer to end ofreport for text of notes and definitions. <br /> Page 4 of 6 <br />