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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-034Z <br /> Pinnacle-C P Project Arco 548,Stockton,CA Sampled 10/26/98 to 10/27/98 <br /> 3939 Cambridge Road,Ste 220 Project Number N/A Received 10/28/98 <br /> Zameron Park,CA 95682 Project Manager Mark Cap s Reported 11/17/98 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytteal -Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> WS . 8110136 Dl(e Prepared 11/9198 Extraction Mfthod. EPA 5030B [PITJ <br />)1aaR 81 l 0I 6_BLK1 <br /> thanol 11/9/98 ND ug/l 3000 <br /> ert-butyl alcohol ND „ 200 <br /> lethyl tert-butyl ether ND 2 00 <br /> li-isopropyl ether ND 2 00 <br /> thy] tert-butyl ether ND 200 <br /> ert-amyl methyl ether ND 2 00 <br /> iri ogate I 1-DCA-d4 500 531 <br /> 600-140 106 <br /> CS 81101 {-BS1 <br />[ethy[ tent-butyl ether 11/9/98 500 39 1 ug/) 700-130 782 <br /> irrogate 1 2-DCA-d4 11 500 492 600-140 984 <br /> ST10i3 -MST S811057-01 <br /> IcthVrt-btyl ether 1116198 500 ND 533 ug/I 600-140 107 <br />'rrogate 1,2-DCA-d4 11 500 567 600-140 113 <br /> a_trlx Spike nun 811_0136-MSD1 $81111057-01 <br /> ethyl tert-butyl ether 11/6/98 500 ND 425 ug/l 600-140 850 250 229 <br /> rrogate 12-DCA-d4 500 596 600-140 119 <br /> 8110145 Datel!repared. 11110198 <br /> Mk8110145-RLKt Extraction Methpd. EPA Sn30R rLQ <br /> iano1 11/10/98 ND ug/l 3000 <br /> rt-butyl alcohol ND 200 <br /> thyl tert-butyl ether ND 200 <br /> isopropyl ether " ND 200 <br /> lyl tert-butyl ether " ND 2 00 <br />-t amyl methyl ether " ND „ 200 <br /> rogate 1 2-DCA-d4 500 453 600-140 90 6 <br /> 110145,,-BS1 <br /> thyl tert-butyl ether 11/10/98 500 385 ug/I 700-130 770 <br /> rogate 12-DCA-d4 500 443 600-140 88 6 <br /> S Duo 8110145-13SD1 <br />[hyl ter(-butyl ether 11/10/98 500 444 ug/l 700-130 88 8 25 0 14 2 <br /> rogate 1 2-DCA-d4 500 429 " 600-140 858 <br /> uoia Analytical -Sacramento *Refer to end ofreport for text ofnotes and definitions <br /> i <br /> ald W Bobel,Client Services Represegtative Page 5 of 6 <br />