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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 fAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 41W Analytical 8195triker 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)792-0342 <br /> Upgradient Environmental Consultants Project Conrady Property Sampled 9/24/98 <br /> 336 Augusta Court Project Number N/A Received 9/24/98 <br /> Valle 5 ,CA 95252 Project Manager Vic Cherven Reported 10/8198 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX 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 /> Batch, 8100031 Date Prepared, 1011198 Extraction Method. EEA 5030A (P/T1 <br /> Blank 8100031-gLKl <br /> Purgeable Hydrocarbons I0/1/98 ND ug/l Soo <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-Trifluorotoluene 100 100 600-140 100 <br /> LES 8100031-BS 1 <br /> Benzene 10/1/98 100 108 ug/1 700-130 108 <br /> Toluene 100 999 700-130 999 <br /> Ethylbenzene 100 993 700-130 99 3 <br /> Xylenes(total) 300 29 4 700-130 98 0 <br /> 4c:' <br /> a-Trifluorotoluene 100 10 1 600-140 101 <br /> 8100031-MS1 5809299-03 <br /> Benzene 1011198 100 ND 104 ug/l 600-140 104 <br /> Toluene 100 ND 928 " 600-140 92 8 <br /> Ethylbenzene 100 ND 958 600-140 95.8 <br /> Xylenes(total) 300 ND 28 9 600-140 96 3 <br /> Surrogate a,a,a-Trrfluorotoluene 100 946 600-140 94 6 <br /> Matrix Spike Duo 8100031-MSDI 5809299-03 <br /> Benzene 1011198 100 ND 105 ug/1 600-140 105 250 0 957 <br /> Toluene 100 ND 935 600-140 935 25 0 0 751 <br /> Ethylbenzene 100 ND 964 600-140 964 250 0 624 <br /> Xylenes(total) 300 ND 29 0 600-140 96 7 250 0 415 <br /> Surrogate a,a,a-Trrfluorotoluene 100 932 600-140 93 2 <br /> match. 8100073 Date Prepay, 1015198 Extraction_Metl10fls_]EPA 5030134F11) <br /> Bran 8100073-BLK1 <br /> Purgeable Hydrocarbons 1015198 ND 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 /> Surrogate a s a-Trrfluorotoluene 100 103 600-140 103 <br /> LES 8100073-145I <br /> Benzene 10/5/98 100 10 7 ug/I 700-130 107 <br /> Toluene 100 10 0 700-130 100 <br /> uoia Analytical-Sacramento *Refer to end ofreport for text of notes and defintaons <br /> mda C Schneider, Laboratory Director Page 4 of 7 <br />