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Sequoia 814 Straker Avenue Suite 8 ' <br /> Sacramento CA 95834 <br /> (9 t 6)921-%W <br /> Analytical FAX equ 9absrom <br /> www sequoiaia65 corn <br /> 40 <br /> Gettler-Ryan-Dublin Project Chevron 9-6258, Stockton,CA Sampled 4/24100 <br /> 6747 Sierra Court,Ste J Project Number 386844 Received 4126/00 <br /> Dublin,CA 94568 Pro ect Mana er Deannal, Harding Reported 5/10/00 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalyte_ Analyzed Level Result Result Units Recov Limits % Limit % Notesoki <br /> Batch 0050053 Date Prepared 5/3100 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050053-BLKI <br /> Purgeable Hydrocarbons 5/3/00 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 2 50 <br /> Surrogate a,a,a-Triuorotoluene 100 871 600-140 871 <br /> LCS 0050053-BSI <br /> Benzene 513100 100 9 53 ug/l 700-130 953 <br /> Toluene 100 948 700-130 948 <br /> Ethylbenzene too 9 53 700-130 95 3 <br /> Xylenes(total) 300 285 700-130 950 <br /> Methyl tert-butyl ether 100 9 10 700-130 910 <br /> Surrogate a,a,a-Tr fluorotoluene 100 867 600-140 867 <br /> Matrix Spike 0050053-MSI 5004398-03 <br /> Benzene 5/3/00 100 ND 100 ug/1 600-140 100 <br /> Toluene 100 ND 977 11600-140 977 <br /> Ethylbenzene 100 ND 995 600-140 995 <br /> Xylenes(total) 300 ND 299 600-140 997 <br /> Methyl tert-butyl ether 100 ND 120 600-140 120 <br /> Surrogate a,a,a-Triuorotoluene to100 847 600-140 847 <br /> Matrix Spike Dup 0050053-MSDI 5004398-03 <br /> Benzene 5/3/00 100 ND 988 ug/l 600-140 988 25 0 121 <br /> Toluene of 100 ND 989 " 600-140 989 250 122 <br /> Ethylbenzene to 100 ND 982 to 600-140 982 25 0 1.32 <br /> Xylenes(total) to 300 ND 293 " 600-140 977 250 203 <br /> Methyl tert-butyl ether 100 ND 8 88 It <br /> 600-140 88 8 25 0 299 1 <br /> Surrogate a,a,a-Trifluorotoluene 100 8 72 600-140 872 <br /> Batch- 0050071 Hate Prepared 5/4/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050071-BLKI <br /> Purgeable Hydrocarbons 5/4/00 ND ug/l 500 <br /> Benzene " ND 0 500 <br /> Toluene " ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) " ND 0 500 <br /> Methyl tert-butyl ether ND 2 50 <br /> Sequoia Analytical-Sacramento *Refer to end of reportfor text of notes and definitions <br /> ,per Page 5 of 9 <br />