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t Sequoia 819 Striker Avenue Suite 8 <br /> 4 � Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical <br /> FAX(916) 921-0 100 <br /> MCON/IT-Cameron Park Project Don Rogers Sampled 1115199 <br /> 3939 Cambridge Road,Ste 220 Project Number 792773/22613-100003 Received 1118199 <br /> Cameron Park,CA 95682 Project Manager Mark Capps___ Reported 11/19/99 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE 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 /> Batch 9110124 Date Prepared 11/10/99 Extraction Method EPA 5030E McOH <br /> Blank 9110124-BLK1 <br /> Purgeable Hydrocarbons 11/10/99 ND ug/l 500 <br /> Benzene ND 110 500 <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 9 61 600-140 961 <br /> LCS 9110124-BS1 <br /> Benzene 11/10/99 100 9 65 ug/1 700-130 965 <br /> Toluene " 100 9 71 700-130 97 1 <br /> Ethylbenzene 100 972 700-130 97 2 <br /> Xylenes(total) 300 291 700-130 970 <br />,gkethyl tert-butyl ether 100 103 700-130 103 <br /> rogate a a a-Trifluorotoluene 100 9 68 600-140 968 <br /> Matrix_Spike 9110124-MSI S911072-02 <br /> Benzene 11/10/99 100 ND 9 68 ug/l 600-140 968 <br /> Toluene 100 ND 9 69 600-140 969 <br /> Ethylbenzene 100 ND 9 72 600-140 972 <br /> Xylenes(total) 300 ND 292 600-140 973 <br /> Methyl tert-butyl ether 100 ND 108 600-140 108 <br /> Surrogate a,a,a-Tr¢fluorotoluene 100 9 45 H 600-140 945 <br /> Matrix Spike Dup 9110124-MSDI 5911072-02 <br /> Benzene 11/10/99 100 ND 9 78 ug/l 600-140 978 25 0 103 <br /> Toluene 100 ND 9 88 " 600-140 988 250 194 <br /> Ethylbenzene 100 ND 9 86 600-140 98 6 25 0 143 <br /> Xylenes(total) 300 ND 297 600-140 990 250 173 <br /> Methyl tert-butyl ether 100 ND 114 600-140 114 250 _ 541 <br /> Surrogate a a,a-Trifluorotoluene 100 9 43 600-140 943 <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />