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' � 819 Striker Avenue Suite 8 <br /> e qula Sacramento CA 95834 <br /> (916)921-9600 <br />' Analytical www <br /> 921-0100 <br /> sequoequolalabs com <br />' Weston Solutions,Inc-Walnut Creek Protect 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-5(S212417-05)Water Sampled 12/11/02 13 00 Received 12/12/0213 00 <br />'Purgeable Hydrocarbons ND 50 ug/1 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 163% 60-140 "� S-04 <br /> MW-3A(S212417-06)Water Sampled 12/11/02 14 00 Received 12/12/02 13 00 <br /> Purgeable Hydrocarbons 120 50 ug/I 1 2120428 12/24/02 12/24/02 DHS LUFT HC-19 <br /> Benzene ND 050 " <br />'Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) _ ND 0 50 <br /> Surrogate a a a-Trifluorotoluene 115% 60-140 <br /> 2(5212417-07)Water Sampled 12/11/02 14 40 Received 12/12/02 13 00 <br /> Purgeable Hydrocarbons 25000 10000 ug/1 200 2120429 12/24/02 12/24/02 DHS LUFT <br /> Benzene 11000 100 It <br /> 11 11 11 <br /> Toluene ND 100 " <br /> Ethylbenzene 550 100 " <br />,Xylenes(total) _ _ ND 100 _ <br /> Surrogate a a a-Trifluorotoluene 95% 60-140 - <br /> MW-2D(S212417-08)Water Sampled 12/11/02 14 45 Received 12/12/02 13 00 <br />'Purgeable Hydrocarbons 28000 20000 ug/l 400 2120429 12/24/02 12/24/02 DHS LUFT <br /> Benzene 11000 200 " <br /> Toluene ND 200 " <br /> Ethylbenzene 760 200 " <br /> Xylenes(total) _ _ ND 200 <br /> Surrogate a a a-Triuorotoluene 87% 60-140 <br /> Suoia 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 in its entirety <br /> Page 4 of 11 <br />