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` Sequoia <br /> V� 819 Striker Avenue,Suite 8 <br /> 1%0 Analytical Sacramento, 95834 <br /> (916)92 1-9600 <br /> FAX (916)921-0100 <br /> r <br /> Emcon-Cameron Park Project: ARCO 2186,Stockton <br /> 3939 Cambridge Road,Ste.202 PSampled: 6/24199 to 6125/99 <br /> Cameron Park,CA 95682 Project Number: N/A <br /> Project Mana er: Mark Cap s Received: 6/25/99 <br /> Reported: 7!1 I/99 <br /> Total'.Purgeable.Hydrocarbons(6-02),BTEX=aniI.,N. E by DHS LUFT/Quality Con trot <br /> Sequoia Analytical-;Sacramento <br /> Date Spike Sample C <br /> Analyte <br /> Analyzed Level Q Reporting Linzit Recov. RPD Rf'D <br /> yz Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 9060425 <br /> BlaRls 2Q�042 $LKI Extraction Method: EPA 50301D(MtM, <br /> Purgeable Hydrocarbons 6/29/99 <br /> Benzene ND mg/kg 1.00 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) <br /> ND 0.00500 <br /> Methy]tent-butyl ether ND O.p0500 <br /> Surrogate: a,a,a-TriJluorotoluene " ND 0.0500 <br /> 0.200 0.180 60.0-140 90.0 <br /> ;'� QQ�Qg25�BS1 <br /> Benzene 6/29/99 0.200 <br /> Toluene „ 0.209 mg/kg 70.0-130 105 <br /> 0.200 <br /> Ethylbenzene 0.226 . 70.0-130 113 <br /> 0.200 <br /> Xylenes(total) 0.227 70.0-130 113 <br /> 0.600 0.606 70.0-130 101 <br /> Methyl tert-butyl ether " 0 200 0 202 " <br /> Surrogate:. a,a,a-Truorotaluene " 70.0-130 I01 <br /> 0.200 0.176 60.0-140 88.0 <br /> V 9060425-MSI <br /> Menten S906401-01 <br /> 6/29/99 0.200 ND 0.188 mg/kg <br /> Toluene 0.200 ND 0.201 60.0-140 94.0 <br /> Ethylbenzene 60.0-140 101 <br /> 0.200 ND 0.201 60.0-140 IOI <br /> Xylenes(total) 0.600 ND 0.547 " <br /> Methyl tent-butyl ether 60.0-140 91.2 <br /> 0.200 ND 0.190 60.0-140 95.0 <br /> Surrogate: a,a,a-Tr�uorololuene 0.200 0.180 <br /> 60.0-140 90.0 <br /> Matrix Spike DjiR 9060425-Mcn1 - 5906401-01 <br /> Benzene 6/29/99 0.200 ND <br /> Toluene 0.192 mg/kg 60.0-140 96.0 25.0 2.11 <br /> Ethylbenzene <br /> 0.200 ND 0.194 1160.0-140 97.0 25.0 4.04 <br /> .205 <br /> 0.200 ND 011 60.0-140 102 25.0 0.98= <br /> Xylenes(total) 0.600 ND 0.558 " <br /> Methyl[ert-butyl ether. 60.0 14D 43.4 25.0 1.95 <br /> 0.200 ND 0.193 60.0-140 96.5 25.0 1.57 <br /> Surrogate.• a,a,a-Tri�uoraloluene 0 200 <br /> Batch: 902Q002 DAU PreparedL-6130/99 <br /> 0.184 60.0-140 92.0 <br /> Puble Hydrocarbons urrg a �O��i <br /> 6/30/99 ND mg/kg Benzene 11g g 1.40 <br /> Toluene ND " 0.00500 <br /> Ethylbenzene H ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.00500 <br /> ND <br /> 0.0500 <br /> Sequoia Analytical-Sacramento <br /> *Refer to end of report for text of notes and def.Ifitions. <br /> Page 1 l of 16 <br />