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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 - <br /> Sequoia 404 N Wlget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 5acramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Iwo- Analytical 1455 MCDOwell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 0 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 12/17/98 <br /> 9912 Business Park Drive,Ste 100 Protect Number 76600-603-04 Received 12/18/98 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 116199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/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 /> Blank(continued) 812022L-ULK.1 <br /> Surrogate a a a-Trtfluorotoluene 12122/98 100 9 71 ug/I 600-140 97 1 <br /> LCS 8120295-BSI <br /> Benzene 12/22/98 100 987 ug/l 700-130 987 <br /> Toluene 100 9 81 700-130 98 1 <br /> Ethylbenzene 100 968 700-130 968 <br /> Xylenes(total) 300 293 700-130 977 <br /> Methyl tert-butyl ether too 879 700-130 879 <br /> Surrogate a a a-Trifluorotoluene 10 0 988 600-140 98 8 <br /> Matti_ x TSmke 8120295-MS1 S812275-06 <br /> Benzene 12/22/98 100 ND 951 ug/l 600-140 95 1 <br /> Toluene 100 ND 938 600-140 938 <br /> ,Jft/benzene 100 ND 931 600-140 93 1 <br /> nes(total) 300 ND 284 60 0-140 947 <br /> Methyl tert-butyl ether 100 ND 9 85 600-140 985 <br /> Surrogate a a a-Trtfluorotoluene loo 945 600-140 945 <br /> Matrix Spike Dun 8120295-MSD1 S812275--b <br /> Benzene 12/22/98 too ND 9 67 ug/l 600-140 967 250 167 <br /> Toluene 100 ND 954 600-140 95 4 25 0 169 <br /> Ethylbenzene 100 ND 947 600-140 947 25 0 170 <br /> Xylenes(total) 300 ND 289 600-140 963 25 0 168 <br /> Methyl tert-butyl ether 100 ND 10 3 600-140 103 25 0 447 <br /> Surrogate a a a-Trtfluorotoluene 100 9 62 600-140 962 <br /> Batch—H]20307 Date Prepared. 12122/98 Extraction Method, EPA 5030B(PIT) <br /> Malik 8120307-BLKl <br /> Purgeable Hydrocarbons 12/22/98 HD ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 500 <br /> Surrogate a a a-Trifluorwoluerre loo 947 600-140 94 7 <br /> 1,cS 8120307-BSI <br /> Benzene 12/22/98 too 9 58 ug/l 700-130 95 8 <br /> Toluene too 9 53 700-130 95 3 <br /> Ethylbenzene 100 9 57 700-130 95 7 <br /> enes(total) 300 286 700-130 95 3 <br /> quoia Analytical-Sacramento *Refer to end of report for text of notes acrd definitions <br /> Page 6 of 9 <br /> Linda C Schneider,Laboratory Director (/ <br />