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]S51 Ial Road <br /> 4DSequoia San CarTlosIOI CA 94070 <br /> (640)212-9600 <br /> Analytical FAX 1650)212-9612 <br /> waw%equoialab�corn <br /> toer-Ryan/Geostratepies(I) Protect Tosco(1) <br /> Stena Court,Suite J Project Number Tosco#5886 Stockton Reported <br /> Dublin CA 94568 Protect Manager Deanna Harding 05/20/02 12 25 <br /> Total Purgeable Ilvdrocarbon (C6-Cl 2) by EPA 801511 and BTEX/MTBE by EPA 8021B <br /> Sequoia Analwical - San Carlos <br /> Reponing <br /> Anahie Requll Limit Unim Dilution Batch Prepared Anahzed Method Notes <br /> TB-1-13(1-205012-01)Water Sampled 05/02/02 00 00 Reectved 0+103102 16 50 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugll 1 2050032 05/15/02 05/15102 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethvlbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 5 0 <br /> Surrogate a,a a-Ti ifluorotoluene 119% 70-130 " <br /> n1W-1 (1-205012-02)Water Sampled 05/03/02 12 35 Received 05/03/02 16_5.0 <br /> Pureeable Hydrocarbons as Gasoline ND 50 ugll 1 2050029 05/14/02 05/14/02 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xvlenes(total) ND 050 <br /> Methvl Cert-but.]ether 430 50 10 05115/02 1N_04 <br /> -me a,a,a-Trifluorotoluene 106% 70-130 05114/01 <br /> M� '-2(1-205012-03)Water Sampled 05/03/02 13 55 Received 05/03/02 16 50 <br /> Purgeable Hydrocarbons as Gasoline ND - 50 ug/l 1 2050029_05/14/02 45/15102 EPA 8021B <br /> Benzene ND 050 <br /> Toluene ND 050 ~ <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methvl Cert-butvi ether 41 5 0 " <br /> Surrogate a a a-Trifluorotoluene 1)4% 70-130 " <br /> is Analytical- San Carlos The results in this report apply to the samples analyzed in accordonce with the chain of <br /> cusiodi document This analytical)eport must be reproduced in its enliren <br /> Page 2 of 23 <br />