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819 Striker Avenue Suite 8 <br /> SequoSequoia y Sacramento CA 95834 <br /> ia (916)911-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequolalabs com <br /> OW <br /> Stratus Environmental Project ARCO 2168, Stockton,CA Sampled 8/30100 <br /> 3330 Cameron Park Drive,Ste 550 Project Number NIA Received 911100 <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 /> MW-6-19 S009016-08 Water <br /> Toluene 0090163 9/15100 9/15/00 100 1260 ug/l D <br /> Ethylbenzene 100 1280 D <br /> Xylenes(total) 100 5570 D <br /> Surrogate 12-DCA-d4 600-140 103 % <br /> Surrogate Toluene-d8 600-140 102 <br /> Surrogate 4-BFB 600-140 104 " <br /> Benzene 0090165 9119100 9119100 200 5290 ug/l D <br /> Surrogate 1,2-DCA-d4 600-140 960 <br /> Surrogate Toluene-d8 600-140 105 <br /> Surrogate 4-BFB 600-140 102 " <br /> MR'-7-19 5009016-09 Water <br /> on,y1benzene <br /> zene 0090163 9/15100 9115100 200 Z2 2 ug/1 <br /> uene 200 195 <br /> 200 490 " <br /> Xylenes(total) _ 200 102 " <br /> Surrogate 12-DC,4-d4 600-140 101 % <br /> Surrogate Toluene-d8 " 600-140 108 " <br /> Surrogate 4-BFB 600-140 106 <br /> MW-8-18 S009016-10 Water <br /> Benzene 0090163 9/15100 9115100 200 ND ug/l <br /> Toluene 200 ND " <br /> Ethylbenzene 200 ND " <br /> Xylenes(total) _ 200 ND " <br /> Surrogate 12-DCA-d4 600-140 100 % <br /> Surrogate Toluene-d8 600-140 111 <br /> Surrogate 4-BFB 600-140 105 <br /> MW-8B-20 5009016-11 Water <br /> Benzene 0090117 9113/00 9/13/00 200 425 ug/1 <br /> Toluene " 200 496 " <br /> Ethylbenzene 200 106 " <br /> Xylenes(total) 200 108 " <br /> Surrogate 1,2-DCA-d4 600-140 920 % <br /> Surrogate Toluene-d8 600-140 106 <br /> Suri agate 4-BFB 600-140 996 " <br /> MW-SC-21 5009016-12 Water <br /> 6nzene 0090163 9/15100 9115100 200 156 ug/l <br /> uene 200 678 11 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 6 of 22 <br />