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i Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> Pacific Environmental Group-Sac Protect Chevron 1001621,Banta,CA Sampled 5126198 <br /> 11315 Sunrise Gold Circle St M Project Number 920 002 2D Received 7127198 <br /> Rancho Cordova,CA 95742 Project Manager Chris Brown Rtported 7128198 <br /> MTTBE 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 Recov Limits % Limit % Notes* <br /> '1812tcb, 8070335 Date Prepared. 612198 Extraction Method, EPA 503013(r/T) <br /> Blank 8070335-BLK1 <br /> Methyl tert-butyl ether 6/2/98 ND ug/I 500 <br /> Surrogate a,a,a-Triuorotoluene 100 954 to 600-140 95 4 <br /> �LrM 8070335-BSI <br /> Methyl tert-butyl ether 6/2/98 100 104 ug/I 700-130 104 <br /> 'Surrogate a,a,a-Trifluorotoluene 100 980 it 600-140 980 <br /> Matrix 5n1ke 8070335-MSI S805276-05 <br /> Methyl tert-butyl ether 612198 100 ND 9 74 ug/1 600-140 974 <br /> Surrogate a a a-Trifluorotoluene it 100 9 64 600-140 964 <br /> Matrix Spike Dun 8070335-MSDI S805276-05 <br /> thyl tert-butyl ether 612198 100 ND 109 ug/l 600-140 109 25 0 11 2 <br /> gW,gate a,a a-Trifluorotoluene 100 922 " 600-140 922 <br /> Batch. 8070347 Date Prepared, 612198 Extraction Method. EPA 5030E 4EM <br /> IIllank 80703477BLK1 <br /> Methyl tert-butyl ether 612198 ND ugA 500 <br /> Surrogate a,a,a-Trifluorotoluene 100 9 86 to 600-140 98 6 <br /> 'LLS 8070347-BSI <br /> Methyl tert-butyl ether 6/2198 100 109 ug/l 700-130 109 <br /> Surrogate a,a a-Trifluorotoluene " 100 925 600-140 925 <br /> Matrix Spike $070347-MSI 5807310-05 <br /> Methyl tent-butyl ether 6/2/98 100 ND 113 ug/I 600-140 113 <br /> Surrogate a,a,a-Try7uorotoluene to100 980 to600-140 980 <br /> 'Maim Spike Dup 8070347-MSDI S807310-05 <br /> Methyl tert-butyl ether 6/2/98 100 ND 102 ugA 600-140 102 25 0 102 <br /> �urrogate a a a-Trifluorotoluene 100 938 or600-140 93 8 <br /> e4uoia Analytical-Sacramento "Refer to end of report for text of notes and definitions <br /> nda C Schneider,Laboratory Director �q Page 4 of 5 <br /> .s�. <br />