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4D Sequoia 819 Striker Avenue, Suite 8 <br /> Sacramento CA 95834 <br /> I%ff Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> MILFMCON/IT-Cameron Park Project IBC-Stockton Sampled 11/5/99 <br /> 3939 Cambridge Road,Ste 220 Project Number 792759122605-101 003 Received 11/8/99 <br /> Cameron Park,CA 95682 Project Manager Mark Ca s Reported 11/19/99 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUIT/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 /> Batch 9110124 Date Prepared 11/10/99 Extraction Method EPA 5030B McOH <br /> Blank 9110124-13LKI <br /> Purgeable Hydrocarbons 11/10/99 ND ug/1 500 <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-Trifluorotoluene 100 961 600-140 961 <br /> LCS 9110124-BS1 <br /> Benzene 11/I0/99 100 965 ug/I 700-130 96 5 <br /> Toluene 100 9 71 700-130 97 1 <br /> Ethylbenzene 100 9 72 700-130 972 <br /> Xylenes(total) " 300 291 700-130 970 <br /> Mc_thyl tert-butyl ether __ _ 10 0 103 700-130_103 _ <br /> ragate a,a a-Tnfluorotoluene- 10 0 9 68 600-140 968 w <br /> Matrix,Spike 9110124-MSI 5911072-02 <br /> Benzene 11/10/99 too ND 9 68 ug/l 600-140 968 <br /> Toluene I00 ND 969 600-140 969 <br /> Ethylbenzene 100 ND 9 72 600-140 97 2 <br /> Xylenes(total) 300 ND 292 600-140 973 <br /> Methyl tertbutyl ether _ __ "__ 10 0 ND 108 600-140 _108 <br /> Surrogate a o,a-Trifluorotoluene _—" 10 0 � 945 600-140 _ 94 S --_ <br /> Matrix Spike Duo 9110124-MSD1 5911072-02 <br /> Benzene 11/10/99 too ND 9 78 ug/1 600-140 978 25 0 103 <br /> Toluene 11 100 ND 9 88 11600-140 988 25 0 194 <br /> Ethylbenzene 10 100 ND 9 86 600-140 986 25 0 143 <br /> Xylenes(total) 300 ND 297 600-140 990 25 0 173 <br /> Methyl Cert-butyl ether too ND 114 600-140 114 250 541 <br /> Surrogate a aa-Trifluorotoluene 100 943 600-140 943 <br /> Batch 9110158 Date Prepared 11/12/99 Extraction Method EPA 50308 McOH <br /> Blank 9110158-BLKI <br /> Purgeable Hydrocarbons 11/12/99 ND ug/i 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) " ND " 0 500 <br /> Methyl tent-butyl ether ND 250 <br /> is Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> Page 3 of 5 <br />