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' Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> FAXAnalyticalg1 �� <br />' Weston Snluilons,Inc-Walnut Creek Project San Joaquin HSA 5212417 <br /> 1575 Treat Blvd,Ste 212 Project Number N/A Reported <br /> Walnut Creek CA,94596 Project Manager Jessica Levine 12/30/02 18 32 <br />' Total Purgeable Hydrocarbons and BTEX by DHS LUFT <br /> Sequoia Analytical- Sacramento <br />' Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-9(S212417-01)Water Sampled 12/10/02 11 15 Received 12/12/02 13 00 <br />' Purgeable Hydrocarbons ND 50 ug/1 1 2120378 12/23/02 12/23/02 DHS LUFI' <br /> Benzene ND 050 <br /> Toluene ND 050 " <br />' Ethylbenzene ND 050 <br /> Xylenes(total) _ _ __ ND 050 <br /> Surrogate a,a,a-Tris luorotoluene 106% 60-140 <br />' MW-7(5212417-02)Water Sampled 12/11/02 09 00 Received 12/12/02 13 00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 2120428 12/24/02 12124102 DHS LUFT <br /> Benzene ND 050 " <br />' Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) _ ND 050 <br /> Surrogate a a a-Triuorotoluene 115% 60-140 " <br /> -6(5212417-03)Water Sampled 12/11/02 09 45 Received 12/12/02 13 00 <br /> Purgeable Hydrocarbons 140 50 ug/l 1 2120428 12/24/02 12/24/02 DHS LUFT <br />' Benzene 080 050 „ <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total)_' _N_D 0 50 Surrogate a,a,a-Trifluorotoluene 112% 60-140 " <br /> MW4(5212417-04)Water Sampled 12/11/02 10 30 Received 12/12/0213 00 <br />'Purgeable Hydrocarbons ND 50 ug/l 1 2120428 12/24/02 12/24/02 DHS LUFT <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) _ _ ND 050 <br /> Surrogate a a a-Trifluorotoluene 86% 60-140 " <br /> S-anoia Analytical-,Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br />' custody document This analytical report must be reproduced to its entirety <br />' Page 3 of 11 <br />