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S e qu®i a 814 Striker Avenue,Suite 8 <br /> C.� Sacramento,CA 95834 <br /> (916)921-9600 <br /> FA,X o0Analytical wwwsequoialabs.con <br /> Delta Environmental Consultants Project: ARCO 5469, Stockton, CA Sampled: 6/5/00 to 6/8100 <br /> 3164 Gold Camp Drive, Ste.200 Project Number: N/A Received: 6/9100 <br /> Rancho Cordova,CA 95670 Project Manager: Jay Johnson Reported: 6128100 <br /> � h� �Yr � Tata1 Puraeable Hydroc Barbar ons(C6 C1Z),BT1~X and�MTBE'by DSS LUFT/ ualit-Control` '�'; �.���'�� `��" <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 0060148 Date Pre ared: 61I4100 Extraction Method: EPA 5'030B (MeOH) <br /> B i a n k 0060148-B LKl <br /> Purgeable Hydrocarbons 6/I4/00 ND mg/i'g 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND " 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Surrogate; a,a,a-Truarotoluene 0.200 0.192 60.0-140 96.0 <br /> LCS 0060148-BSI <br /> Benzene 6/14/00 0.200 0.186 mg/kg 70.0-130 93.0 <br /> Toluene 0.200 0.194 70 0-130 97,0 <br /> Ey benzene 0.200 0.194 70.0-130 97.0 <br /> t <br /> Ivs(total) 0.600 0.545 70.0-130 40,M6 <br /> yl ert-butyl ether 0.200 0.169 70.0-130 84.5 <br /> Surrogate: a,a,a-Triuorotoluene 0.200 0.195 60.0-140 98.0 <br /> Matrix Snike 0060148-MS1 S006136-01 <br /> Benzene 6/14/00 0.200 ND 0.146 mg/kg 60.0-140 73.0 <br /> Toluene 11 0.200 ND 0.145 60.0-140 72.5 <br /> Ethylbenzene ,r 0.200 ND 0.152 60.0-140 76.0 <br /> Xylenes(total) " 0.600 ND 0.445 60.0-140 74.2 <br /> Methyl tert-butyl ether 0.200 ND 0.133 60.0-140 66.5 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.194 60.0-140 97.0 -- <br /> Matrix Spike Duty 0060149-MSD/ 5006136-01 <br /> Benzene 6/14/00 0.200 ND 0.148 mg/kg 60.0-140 74.0 25.0 1.36 <br /> Toluene „ 0.200 ND 0.156 60.0-140 78.0 25.0 7.31 <br /> Ethylbenzene 0.200 ND 0.155 60.0-140 77.5 25.0 7.31 <br /> Xylenes(total) 0.600 ND 0.453 60.0-140 75.5 25.0 1.74 <br /> 95 <br /> Methyl tett butyl ether 0.200 ND 0.I39 60.0-140 69.5 25.0 4.4 <br /> Surrogate: a,a,a-Trifluorotoluene - 1 <br /> 0,200 0.195 60.0-140 97.5 <br /> Batch: 0060149 Date Prepared: 6114100 Extraction Method: EPA 5030B(MeOHI <br /> Stank 0060149-13LKI - <br /> Purgeable Hydrocarbons 6/14/00 ND mg/kg Loo <br /> Benzene ?�D 0.00500 <br /> roluene <br /> ND 0.00500 <br /> 3thylbenzene <br /> Kylenes(total) ND 0.00500 <br /> ND 0.00500 <br /> 149ert-butyl ether " IT'D „ <br /> 0.0500 � <br /> Sequoia AnalS ticaE-Sacramento *Refer to end ofreport for text of notes and defnitions. <br /> Page 17 of 25 <br />