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Sequoia 819 Striker A ' <br /> Sacramento,CA 95934Ste 95834 <br /> {, (916)921-9600 <br /> A,n ally l.A�•al FAX(916)921-11 <br /> wwwsequoiala6s.comom <br /> P-' �r-R an-Petaluma Project: Tosco 11195 Lathro CA <br /> ''<' y ] A 5212401 <br /> i�- .•:4 <br /> [ i N McDowell Blvd.Ste B2 Project Number: N/A Reported: <br /> Petaluma CA,94954 Project Nlanagen Jed Douglas 12/31/02 12:52 <br /> GasolineTTMOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-18-S(10.5)(5212401-01)Soil Sampled: 1211010200:00 Received:12/12/0210.00 <br /> Benzene ND 0.0050 mg/kg 1 2120307 12/18/02 ID 19/02 EPA 8260B <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 <br /> Xylenes(total) ND 0.010 " <br /> Methyl tert-butyl ether ND 0.0050 " <br /> Gasoline(C6-C10) ND 1.0 <br /> Surrogate:1,2-DCA-d4 83% 60-140 " <br /> Surrogate:Toluene-d8 116% 60-140 <br /> Surrogate:4-BFB 98% 60-140 " <br /> MW-19-S(IO) 5212401-02 Soil Sampled: 12/10/02 00:00 Received: 12/12/02 10:00 <br /> Benzene ND 0.0050 mg/kg 1 2120307 12/18/02 12/19/02 EPA 8260E <br /> Toluene ND 0.0050 " " " " " <br /> 11. <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.010 <br /> P, ?�1 Cert-butyl ether 0.0067 0.0050 " <br /> <- <br /> GF ine(C6-C10) ND 1.0 <br /> Surrogate:1,2-DCA44 81 % 60-140 <br /> Surrogate:Toluene-d8 114% 60-140 " <br /> Surrogate:4-BFB 90% 60-140 " <br /> MW-20-S(IO) 5212401-03 Soil Sampled: 12/10/02 00:00 Received: 12112/0210:00 <br /> Benzene ND 0.0050 mg/kg 1 2120307 12/18/02 12/19/02 EPA 8260B <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.010 " <br /> Methyl tert-butyl ether ND 0.0054 " <br /> Gasoline(C6-C10) ND 1.0 " <br /> Surrogate:1,2-DCA-d4 132% 60-140 <br /> Surrogate: Toluene-d8 100% 60-140 " <br /> Surrogate:4--BFB 97% 60-140 <br /> <;flia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> Custody docttnrent. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 3 of 7 <br />