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' Sequoia680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Cane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 'Pacific Environmental Group-Sac Project Chevron 1001621,Banta,CA Sampled 5/27/98 <br /> 11315 Sunrise Gold Circle St M Project Number 920 002 2D Received 7/27/98 <br /> Rancho Cordova,CA 95742 Pro ect Manager Chris Brown Reported 7/28/98 <br /> ' MTBE by DHS LLFT/QuaLty 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 /> 'Batch. 8070346 ngte PPrCpared. 613198 Extraction Method, FPA 50306(F/T) <br /> D1aIIk 8070346-BLKI <br /> Methyl tert-butyl ether 6/3/98 ND ug/l 500 <br /> 'Surrogate a a,a-Trtfluorotoluene 100 101 600-140 101 <br /> US $070346-11S I <br /> Methyl tert-butyl ether 613198 100 112 ug/l 700-130 112 <br /> 'Surrogate a a,a-Triuorotoluene ff100 105 600-140 105 <br /> Matrix Spike 8070346-MSI 5905321-06 <br /> Methyl tert-butyl ether 6/3/98 100 ND 128 ug/1 600-140 128 <br /> Surrogate a a a-Tri luorotoluene 0, 100 101 600-140 101 <br /> Matrix Spike flue 8070346-MS12/ 5805321-06 <br /> �thyl tert-butyl ether b/3/9$ 10 0 ND 32 2 ug/l 60 0-]40 122 25 0 4 80 <br /> ogate a a a-Triuorotoluene 100 9 41 600-140 941 <br /> $atch. 8070348 Date Prepared. 6/3198 Extraction Method, FPA 5030E(P/T) <br /> 'Blank 897034&BLK1 - <br /> Methyl tert-butyl ether 6/3/98 ND ug/1 500 <br /> Surrogate a,a,a-Triuorotoluene 100 9 79 600-140 979 <br /> I8070348-BSI <br /> Methyl ten-butyl ether 6/3/98 100 9 94 ug/l 700-130 994 <br /> Surrogate a a a-Tnfluorotoluene 100 9 67 600-140 967 <br /> 8070348-M S l 5805310-08 <br /> IIIIM Methyl cert-butyl ether 613198 100 ND 102 ug/l 600-140 102 <br /> 'Surrogate a a,a-Triuorotoluene f, 100 972 600-140 972 <br /> - S805310-08A p�� <br /> Methyl tert-butyl ether 613/98 100 ND 9 26 ug/l 600-140 926 25 0 966 <br /> rrrogate a a a-Trifluorotoluene 100 917 " 600-140 91 7 <br /> 1 <br /> equoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> oda C Schneider-,Laboratory Director Page 3 of 4 <br />