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' 819 Sutker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921 0100 <br /> %P�& uww sequoralabs com <br /> ' Weston Solutions,Inc-Walnut Creek Project San Joaquin HSA S401313 <br /> 1575 Treat Blvd,Ste 212 Project Number 4th Quarter Sampling Reported <br /> Walnut Creek CA,94596 Project Manager Jessica Levine 01/28/04 13 41 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-5(S401313-05)Water Sampled 01/13/04 16 30 Received 01/14/04 15 45 <br /> Gasoline Range Organics ND 50 ug/1 I 4010202 01/19/04 01/19/04 EPA <br /> 8015B18021B <br /> Benzene ND 050 " <br /> ' Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorotoluene 140% 60-140 " <br /> MW-3A(S401313-06)Water Sampled 01/14/04 10 00 Received 01/14/04 15 45 <br /> Gasoline Range Organics 150 50 ug/l 1 4010202 01/19/04 01/19/04 EPA HC-19a <br /> 801513/80218 <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> urrogate a a a-Trafluorotoluene 131 % 60-140 <br /> -Tank(5401313-07)Water Sampled 01/14/04 10 45 Received 01/14/04 15 45 <br /> Gasoline Range Organics ND 50 ug/1 1 4010202 01/19/04 01/19/04 FPA <br /> ' 8015B/8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> ' Xylenes(total) ND 050 ° <br /> Surrogate a a a-Trafluorotoluene 121 % 60-140 <br /> MW-2A(S401313-08)Water Sampled 01/14/04 12 00 Received 01/14/04 15 45 <br /> ' Gasoline Range Organics 2600 500 ugA 10 4010202 01/19/04 01/19/04 EPA <br /> 8015B/8021B <br /> Benzene 48 5 Q " <br /> Talvene 6 5 5 0 , <br /> Ethylbenzene 130 50 <br /> Xylenes(total) 32 5 0 <br /> Surrogate a a a-Trafluorotoluene 130% 60-140 " <br /> r <br /> ' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless othenvise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 10 <br />