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819 Striker Aye Ste 8 <br /> ° Sequoia Sacramento CA9�834 <br /> �'►=�'� (916)921 9600 <br /> r Analytical F4X(9t6)9210100 <br /> w%%1,sequoialabs corn <br /> Weston Solutions,Inc-Walnut Creek Project San Joaquin HSA S310130 <br /> 1575 Treat Blvd Ste 212 Project Number 3rd Quarter Sampling Reported <br />' Walnut Creek CA,94596 Project Manager Jessica Levine 10/22/03 13 34 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br />' Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limn Units Dilution Batch Prepared Analyzed Method Notes <br />' MW-9(5310130-01)Water Sampled 10/06/03 00 00 Received 10/07/03 11 30 <br /> Gasoline Range Organics ND 50 ug/l 1 3100076 10/07/03 10/07/03 EPA 8021B <br /> Benzene ND 050 " <br />' Toluene ND 050 ' <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Surrogate a a a-Trifluototoluene 109% 60-140 <br />' MW-2(S310130-02)Water Sampled 10/06/03 16 50 Received 10/07/03 11 30 <br /> Gasoline Range Organics 24000 5000 ug/1 100 3100076 10/07/03 10/07/03 EPA 8021E <br /> Benzene 9400 50 <br />' Toluene ND 50 <br /> Ethylbenzene 360 50 <br /> Xylenes(total) 270 50 <br /> Sttrrogate a a a-Tris luorolohiene 127% 60-140 <br /> IwW-2A(S3t0i30-03)Water Sampled 10/06/03 16 20 Received 10/07/03 11 30 <br /> asoline Range Organics 1700 50 ug/1 1 3100076 10107/03 10/07/03 EPA 8021B <br /> Benzene 26 0 50 " <br />' Toluene 4 8 050 " <br /> Ethylbenzene 2 7 050 <br /> Xylenes(total) 2 7 050 <br />' Surrogate a a a-Trifluorotohtene 131 % 60-140 <br /> EB-1 (S310130-04)Water Sampled 10/06/03 17 05 Received 10/07/03 11 30 <br /> Gasoline Range Organics ND 50 ugll 1 3100076 10/07/03 10107/03 EPA 8021B <br />' Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorololuene 107 Y. 60-140 <br /> 1 <br />' Sequoia Analytical - Sacramento The results in this report appli to the samples analized ru accordant e v,ith the chain of <br /> ctiviodtdot,wuEtrt Unlesv othernise stated iesidisatctepoitedonauEtr.Cw,htbasis <br /> This anali tical report nrust bE ieproduced in its entire o <br />' Page 3 of 6 <br />