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s} <br /> Sequoia 680 Chesapeake Drive Rcdwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N W}get Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EMCON- Sac Project Arco 2168,Stockton,CA Sampled 5/21198 to 5/22/98 <br /> 1433 N Market Blvd Project Number 22312 00 Received 5/22/98 <br /> Sacramento, CA 95834 Prosect Manager Dave Foley Reported 6/15/98 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch. 8060147 Date Prepared. 6/4/98 <br /> Extracti <br /> 131�.itk on Method., F)?A�030E3 Ip1T1 <br /> $460147-BLKi <br /> Ethanol 6/4198 ND ug/I 3000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether " ND " 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 12-DCA-d4 500 553 600-140 111 <br /> LCS 8060I47-13S I <br /> Methyl tert-butyl ether 6/4/98 Soo 364 ug/I 700-130 728 <br /> Surrogate 12-DCA-d4 Soo 584 600-140 117 <br /> 890147-Will 5805266-00 <br /> A ert-butyl ether 6/3198 500 ND 685 ug/I 600-140 I37 <br /> Surrogate 12-DCA-d4 11 500 834 600-140 167 5 <br /> Ylatrix Spike in $960147-MSD1 S805266-00 <br /> Aethyl tert-butyl ether 6/3/98 Soo ND 530 ug/l 600-140 106 25 0 255 6 <br /> surrogate 12-DCA-d4 Soo 694 600-140 139 <br /> 3atch. 8060148 Date Preparrd. 6/5198 Extraction Method. FPA 503-OB-IP/Tl <br /> Hank $060148-BLK I <br />:thanol 6/5/98 ND ug/I 3000 <br />-ert-butyl alcohol ND 200 <br /> Aethyl tert-butyl ether ND 200 <br />)i-isopropyl ether ND 200 <br /> thyl ter-butyl ether ND 200 <br /> ert-amyl methyl ether ND 200 <br /> arrogate 12-DCA-d4 500 66 7 600-140 133 <br /> ICS $9b4148-BS1 <br /> lethyl tert-butyl ether 6/5/98 500 377 ug/I 700-130 754 <br /> urrogate 12-DCA-d4 11 500 663 600-140 133 <br /> latrix Spike 8060I48-MSI S805266-00 <br /> lethyl Cert-butyl ether 6/3/98 500 ND 685 ug/l 600-140 137 <br /> urrogate 1 2-DCA-d4 11 500 830 600-140 166 7 <br /> latrix Spike Dun _ S805266-00 <br /> leth Obutyl ether 6/3198 500 ND 530 ug/I 600-140 106 25 0 25 5 8 <br />�quoia Analytical- Sacramento *Refer to end of report for text ojnotes arrd def+nttro,rs <br /> onald W Bobel,Client Services Representative Page 8 of 10 <br />