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Sequoia 819 Striker Avenue, Suite 8 <br /> +, Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> L I <br /> Emeon-Cameron Park Project: ARCO 2186,Stockton Sampled: .6/24199 to 6/25/99 <br /> 3939 Cambridge Road,Ste.202 Project'Number: N/A ' Received: 6/25/99 <br /> Cameron Park,CA 95682 Pro'ect Manager: Mark 'apps Reported: 7/11/99 <br /> Total Purgeable Hydrocarbons(C&C12),BTEX and MTBE by DHS LUFI' <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> ��� S906437-41 �Qll <br /> Purgeable Hydrocarbons 9060425 6/29/99 6/29/99 <br /> Benzene 500 7444 mg/kg 1,D <br /> „ <br /> Toluene „ 2.50 5.06 D <br /> Ethylbenzene 2.50 171 D <br /> Xylenes(total) 2.50 103 D2.50 588 <br /> Methyl tert-butyl ether „ D <br /> Surrogate: a,a,a-Trrfluorotoluene 25.0 87.4 D <br /> 6o.o-d4a 92.5 % <br /> Purgeable Hydrocarbons <br /> 9Q60425 6/29/99 6/29/99 <br /> Benzene 1.00 ND mg/kg <br /> „ <br /> Toluene <br /> 0.00500 ND <br /> Ethylbenzene „ 0.00500 ND <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND <br /> Surrogate: a,a,a-Truorotoluene „ 0.0500 ND " <br /> 60.0-140 87.5 <br /> Purge hI Hydrocarbons �� <br /> 9060425 6/29/99 6/29/99Sl <br /> Benzene ., 1.00 ND mg/kg <br /> Toluene 0.00500 ND <br /> Ethylbenzene „ „ 0.00500 ND " <br /> Xylenes(total) „ 0.00500 ND <br /> MOW tert-butyl ether 0.00500 0.0109 " <br /> Surrogate: a,a,a-TrV7uoroto1uene " 0,0500 ND + <br /> 60-0-140 89.5 <br /> �� 522697-Q� <br /> Purgeable Hydrocarbons 9060425 6/29/996/29/99 SA <br /> Benzene „ „ 1.00 ND mg/kg <br /> Toluene 0.00504 ND <br /> Ethylbenzene 0.04500 ND <br /> „ <br /> Xylenes(total) „ „ 0.00504 ND " <br /> Methyl tert-butyl ether „ 0.00540 ND <br /> Surrogate: a,a,a-7`rY7uorotoluene " „ 0.0500 ND <br /> 60.0-140 88.5 . <br /> Purges cab/Hydrocarbons5906437-05 <br /> 9060425 6/29/99 6/29/995911 <br /> Benzene „ „ 1.00 ND mg/kg <br /> Toluene 0.00500 ND <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) „ 0.00500 ND <br /> „ <br /> 0.00500 ND <br /> Sequoia Anaiyticai-Sacramento <br /> *Refer to end of report for text of notes and definitions. <br /> Page 2 of 16 <br /> • 7 <br />