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Mar-02-99 11 :O9A Pinnacle/EMCON 1 '" P-O7 <br /> - 684 Chesapeake[klve itedvaood City.CA 94063 (6501 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 rAX{925)988-9673 <br /> Analytical 1455 <br /> Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(9145)9zt-0100 <br /> 1455 McDowell Blvd.North.Ste,D I'etaiuma.CA 94954 (107)792-1865 fAX(707)792.0342 <br /> Pinnacle-C.P. Project: Arco 548,Stockton,CA Sampled: 10/26/98 to 10/27198 <br /> 3939 Cambridge Road,Ste. 220 Project Number: NIA Received: 10/28/98 <br /> Cameron Park,CA 95682 Project Manager: Mark Cap2s Reported: l 117198 <br /> Volatile Organic Compounds by EPA Method 8260AlQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> lAnaln Analyzed Level Result Result Units Recov. Limits % Limit % Notes"` <br /> Batch: 8110136 Date Prvpared- I I&198 Extraction 1Nethed: EPA 50308 IP/71 <br /> Bl2n 8110136-ULKI <br /> Ethanol 11/9198 NO ugll 3000 <br /> Tert-butyl alcohol NO 200 <br /> Methyl tert-butyl ether NO 2.00 <br /> Di-isopropyl ether NO 2.00 <br /> Ethyl ten-butyl ether NO 2.00 <br /> 4 Tert-amyl methyl ether ND 2.00 <br /> f Sunogare: 1,1-DCA-d4 50.0 53.1 600-140 106 <br /> 1SS 8110136-BS1 <br /> Methyl tert-butyl ether 1119198 50.0 39.1 ugA 70.0-130 78,2 <br /> Surrogate: 1,2-DCA-d4 50.0 49.2 60.0-140 98.4 <br /> Matrix Spike $110136-MSI S8 1 1057-01 <br /> Methyl cert-butyl ether 11/6198 50.0 ND 53.3 ug11 60.0-144 107 <br /> Surrogate: 1,2-DCA-d4 50.0 56.7 60.0-140 113 <br /> Matrix Spike Duo $]10136-HLSD1 5811057-01 <br /> Methyl Cert-butyl ether 1116198 50.0 ND 42.5 ug/I 50.0-140 eS.O 25:0 22.9 <br /> Surrogate: 1,2-DCA-d4 1150.0 59.6 " 60.0-140 119 <br /> Batch: 8110145 Rxtraction&I-eifiod: EPA 50300JPIPI <br /> Blank 8110145-BLKI <br /> Ethanol 11/10/98 NO ug11 3000 <br /> Tert-butyl alcohol ND " 200 <br /> Methyl tert-butyl ether NO 2.00 <br /> Di-isopropyl ether ND " 2.00 <br /> Ethyl tert-butyl ether ND 2.00 <br /> Teri-amyl methyl ether N 2.00 <br /> Surrogare: 1.2-DCA-d4 50.0 45.3 60.0-140 90.6 <br /> QU 8110145-BSl <br /> Methy€Ecrt-butyl eater 11/10198 54.0 38.5 ug/I 70.0-130 77.0 <br /> Surrogate: 1,2-DCA-d4 50.0 44.3 60.0-140 88 6 <br /> Ilf LCs Du)1 8110145-BS171 <br /> Mcihyl tent-butyl ether l It'10198 50.0 44.4 usr I 70.0.130 85.8 25.4 34.2 <br /> Surrogate: 1.2-DCA-d4 50.0 42.9 60.0.140 8.5.8 <br /> *Refer to and of report for text ofnores and defruitroors. <br /> Sequoia Analytical-Sacramento <br /> ' Page S of ti <br /> Ronald W t3obel,Client Services Representative <br /> i <br /> I <br />