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Sequoia °Chesapeake Drive Redwood Oty CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget E.anc Walnut Creek.CA 94598 (925)988-%00 FAX(925)968-9673 <br /> ,5), <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(107)791-0342 <br /> I <br /> gradient Environmental Consultants Project Conrady Property Sampled 12/7198 <br /> 6 Augusta Court Project Number N/A Received 1218198 <br /> lle S ,CA 95252 Pro ect Mana er Vic Cherven Reported 12/30/98 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFT1Quallty Control <br /> Sequoia Analytical -Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Uruts "/ Limit % Nates* <br /> Batch. 8120213 DatS fteligirtd.12/14/98 Extraction Method. EPA 503010 <br /> Blank 8120213-BLKI <br /> Purgeable Hydrocarbons 12/14/98 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a,a,a-Trtfluoroioluene /00 101 600-140 101 <br /> US 8120213-BS1 <br /> Benzene 12/14/98 too 112 ug/l 700-130 112 <br /> Toluene too 103 700-130 103 <br /> Ethylbenzene 100 10 0 700-130 10G <br /> Xylenes(total) 300 299 700-130 99 7 <br /> Surrogate a a,a-Trtuorotoluene 100 109 600-140 109 <br /> AillkstrixSRAc 8120213-MSI S812189-03 <br /> enzene 12/14/98 too ND 11 1 ug/1 600-140 111 <br /> Toluene too 247 13 1 600-140 106 <br /> Ethylbenzene 100 ND 10 3 600-140 103 <br /> Xylenes(total) 360 ND 308 600-140 103 <br /> Surrogate a a a-Trihuorotoluene 100 105 600-140 105 <br /> Matrix Spike Duu 8120213-MSDI 5812189-03 <br /> Benzene 12/14/98 100 ND 106 ug/l 600-140 106 25 0 461 <br /> Toluene too 247 124 600-340 993 25 0 6 53 <br /> Ethylbenzene too ND 956 600-140 956 25 0 745 <br /> Xylencs(total) 300 ND 291 600-140 970 25 0 600 <br /> Surrogate a a a-Trifltujrotoluene 100 948 600-140 948 <br /> Batch, 812.4214 Date prepared. 12/15/98 Extraction Method, EPA 503013(PM <br /> Blank 8120214-BLKI <br /> Purgeable Hydrocarbons 12/15/98 ND ug/l 50 0 <br /> Benzene ND 0 500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a a-Tri luorotokiene 100 101 600-140 101 <br /> LIU 8120214-BS1 <br /> Benzene 12/15/98 100 10 9 ugh 700-130 105 <br /> "toluene 100 101 700-130 101 <br /> uoia Analytical-Sacramento *Refer to end of report for tee t of notes and definitions <br /> i to e <br /> Linda C Schneider,Laboratory Director Page 7 of 12 <br />