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Sequoia B19 Avenue,Suite S <br /> Sacramento,CA 95834 <br /> (91(5)921-9600 <br /> FAX <br /> Analytical quo� labs 00 <br /> alabs c <br /> www sequcom <br /> Stratus Environmental Project ARCO 2168, Stockton,CA Sampled 8/30/00 <br /> 3330 Cameron Park Drive, Ste 550 Project Number N/A Received 9/1/00 <br /> Cameron Park,CA 95682 Project Manager Jay Johnson Reported 9/21,27/00 <br /> BTEX by EPA Method 8260A <br /> Sequoia Analytical- Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> I <br /> MW-1-20 5009016-01 Water <br /> Toluene 0090117 9/13/00 9113/00 200 254 ug/l <br /> Ethylbenzene " " 200 654 " <br /> Xylenes(total) 200 650 " <br /> Surrogate 1,2-DCA-d4 600-140 104 % <br /> Surrogate Toluene-d8 600-140 105 <br /> Surrogate 4-BFB 600-140 110 " <br /> Benzene 0090165 9119/00 9/19100 400 8600 ug/l D <br /> Surrogate 12-DCA-d4 600-140 968 <br /> Surrogate Toluene-d8 600-140 109 <br /> Surrogate 4-BFB 600-140 106 " <br /> MW-IB-21 5009016-02 Water <br /> F <br /> ene 0090163 9/15/00 9/15100 200 160 ug/l <br /> ene 200 6 90 " <br /> Ethylbenzene 200 120 <br /> Xylenes(total) 200 262 " <br /> Surrogate 1,2-DCA-d4 600-140 109 % <br /> Surrogate Toluene-d8 600-140 III " <br /> Surrogate 4-BFB 600-140 108 IF <br /> MW-IC-22 S009016-03 Water <br /> Benzene 0090163 9/15/00 9/15/00 200 630 ug/l <br /> Toluene 200 ND " <br /> Ethylbenzene 200 ND " <br /> Xylenes(total) _ 200 406 " <br /> Surrogate 1,2-DCA-d4 <br /> 600-140 106 % <br /> Surrogate Toluene-d8 600-140 114 " <br /> Surrogate 4-BFB If 10 600-140 106 <br /> MW-2-22 5009016-04 Water <br /> Toluene 0090117 9/13/00 9/13100 200 204 ug/l <br /> Ethylbenzene 200 259 " <br /> Xylenes(total) _ 200 322 " <br /> Surrogate 1,2-DC,4-d4 600-140 103 % <br /> Surrogate Toluene-d8 600-140 106 11 <br /> Surrogate 4-BFB 600-140 107 If <br /> Benzene 0090163 9115/00 9/15/00 100 2310 ug/l D <br /> Surrogate 1,2-DCA-d4 " 600-140 108 % <br /> Surrogate Toluene-d8 IF 600-140 112 IF <br /> 1 ogate 4-BFB " IF 600-140 108 11 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nztzons <br /> Page 4 of 22 <br />