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SequoSequoia 68005apeake Drive Redwood City CA 94te (650)364-9600 FAX(650)364-9233 <br /> ia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-%00 FAX(925)988-9673 <br /> A � t77�� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 7 1 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-t865 FAX(707)792-0342 <br /> i <br /> acne Technical Services,lnc Project Shell Oil Co Sampled 12/29/98 <br /> 1680 Rogers Ave Project Number 341 East Main-Ripon Received 12/31/98 <br /> San Jose,CA 95112 Protect Manager Fran Thie Re orted 1115199 <br /> Volatile Organic Compounds by EPA Method 82608/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spice Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike{continued) 9010082-MS1 P901028-04 <br /> Surrogate 1,2-Dichloroethane-d4 1/6/99 500 538 u9/1 800-120 108 <br /> Surrogate Toluene-d8 500 524 It 880-110 105 <br /> Surrogate 4-Bromofluorobenzene 500 515 " 860-115 103 <br /> Matnx Spik Dup 9010082-MSD1 P901028-04 <br /> Surrogate Dibromofluoromethane 1/7/99 500 539 u9/1 860-118 108 <br /> Surrogate 12-D:chloroethane-d4 500 555 800-120 III <br /> Surrogate Toluene-d8 500 530 680-110 106 <br /> Surrogate 4-Bromofluorobenzene " 500 515 860-115 103 <br /> 0 <br /> uoia Analytical-Petaluma *Refer to end of report for text of nates and definitions <br /> Page 6 of 7 <br />