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Mar-02-99 11 : 16A Pinnacle/EMCON "dwo - lam <br /> ,i Ci CA 94063 (6650)364-9600 FAX(650)364-9Z33 <br /> 1 680 Chesapeake Drive WAInuto k, <br /> Se(��1011 404 C sageWget Lane Walnut Creek,CA 44598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 14 Striker Avenue,Suite rt Sacramento.C, 9 95834 (707)742_s� FAX(�7)792-0342 <br /> 1455 Ntctbvukll$Mtl.North,Ste.0 Petaluma CA 94454 ;� ( ) <br /> Pinnacle-GP. Project: Arco 548,Stockton,CA Sampled: 10/26/98 to 10127!98 <br /> 3939 Cambridge Road,Ste.220 Project Number: NIA Received: 10128/98 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Rc orted_ 11111198 <br /> ii <br /> Volatile Organic Compounds by EPA Method$260MQuality Control <br /> Sequoia Analytical-Sacramento <br /> I Date Spike Sample QC Reporting Limit Rmov. RPD RPD <br /> {� Anal to Analyzed Level Result Result Unita` Recov.Limits % Limit % Notes* <br /> Rotch- 8110105 flute gyre& 11/96 Ell o'rtinn Method: EPA 5030D1Me01i( <br /> i <br /> 1112a 8110105-BLKI <br /> Ethanol 1119198 ND mg/kg 150 <br /> Tert-butyl alcohol NO 10.0 <br /> Methyl cert-butyl ether " NO 0.100 <br /> Di-isopropyl ether ND 0.100 <br /> # Ethyl tent-butyl ether ND 0.100 <br /> Tett-amyl methyl ether " ND 0.100 <br /> Surrogate: 1,2-DCA-d4 2.50 2.63 60.0-140 106 <br /> 1.C-5 8110145-13S1 <br /> Methyl tert-butyl ether 11/9/98 2.50 1.96 mg/kg 70.0-130 78.4 <br /> Surrogate: 1,1-DCA-d4 2.50 1.45 60.0-140 98.0" <br /> 1 M2tr6%Spoke <br /> 8110105-MSi SSi1057.O1 <br /> Methyl tett-butyl ether 11/6198 2.50 ND 2.67 mg/kg 64.0-140 107 <br /> Surrogate: 1,2-DCA-d4 1.50 1.84 60.0-140 114 <br /> Matrix SpikeDuv 8110105-hiSDl SR11057-0] <br /> Methyl Cert-butyl ether 11/6/98 2,50 ND 2.13 mg/kg 60.0-140 85.2 25.0 22.7 <br /> Surrogate: 1,2-DCA-d4 112.50 2.98 60.0-140 119 <br /> H&tgh: 8110107 DsitPrg ed: 11/10/98 <br /> Black $111li42:.BLK1 °` ° . <br /> Ethanol 11/10/98 NO mg/kg 150 <br /> k. Tert-butyl alcohol <br /> ND 10.0 <br /> Methyl cert-butyl ether NO 0100 <br /> pi-isopropyl ether NO " 0.100 <br /> Ethyl tert-butyl ether ND 0.100 <br /> ND 4.100 <br /> Teri-amyl methyl ether <br /> Surrogate: 1,2-DCA-d4 2.50 2.17 60.0-140 90.8 <br /> L S11D1Q7-BSS 70.0-130 88.8 <br /> Methyl Cert-butyl ether 1 1/10/98 2.50 2:22 mg/kg <br /> �. Surrogate: 1,1-DCA-d4 250 1.91 60.0-140 76.8 <br /> t <br /> MstrkSnike $t1o1QLb1S1 SR_1012_1-08 <br /> Methyl tert-butyl ether 11110198 2.50 ND 2.93 mg/kg 60-0-140 117 <br /> Surrogate., 1,2-DCA-d4 <br /> 1.50 2.15 60,0-140 86.0 <br /> M2trix Spike-DALp Cpl SRt0323-48 <br /> 111/10/98 2.50 ND 2.26 mg/kg 60.0.540 90.4 30.4 25.7 <br /> Methyl Eert-butyl ether <br /> Sequoia *Refer to end of report for test of notes and def nitions. <br /> Anakytical-Sacramento <br /> Page 10 of 12 <br /> l <br /> Ronald W Bobel,Client Services Rcprese tative <br /> i <br /> 1 <br /> t <br />