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i <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiger Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Stoker 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 /> Pacific Environmental Group-Sac Project Tosco 5417,Manteca, CA Sampled 8120198 <br /> 11315 Sunrise Gold Circle St M Project Number 911-007 IB Received 8124198 <br /> Rancho Cordova, CA 95742 Project Manager Mike Mitehener Reported 8125198 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Splice Sample QC Reporting Limit Recov RPD RPD <br /> Analvtc Analyzed Level Result Result Units Recov Limits % Limit % Notes <br /> Batch 8080242 Date Prepared, 8/24/98 Extraction Method. EPA 5030B(NeOH) <br /> la nl 8080242-BLKI <br /> Pur,eable Hydiocarbons 8/24/98 ND mg/kg 100 <br /> Ben/-ene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Surrogate a s a-Trifluorotoluene 0200 0 180 600-140 900 <br /> LCS 8080242-BS1 <br /> Benzene 8/24/98 0200 0201 mg/kg 700-130 101 <br /> Toluene 0200 0 191 700-130 95 5 <br /> Eth,,Ibenzene 0200 0 188 700-130 94 0 <br /> 1VILM-S(total) " 0 600 0 565 " 700-130 942 <br /> ui oa(ite aaa-Trifluorotoluene 0200 0 191 600-140 955 <br /> Mat]n Spike 8080242-MSI 5808234-01 <br /> Benzene 8124/98 0200 ND 0 182 mg/kg 600-140 910 <br /> Toluene 0200 ND 0 173 600-140 865 <br /> Ethylbenzene 0 200 ND 0 170 600-140 85 0 <br /> Xylenes(total) 0 600 ND 0 510 600-140 850 <br /> Sur i oJale a a a-Trifluorotoluene 0200 0107 600-140 103 <br /> Nlitri-x 8080242-MSD1 S808234=01 <br /> Benlene 8124/98 0200 ND 0 175 mg/kg 600-140 87 5 25 0 392 <br /> Toluene 0200 ND 0 168 600-140 840 250 293 <br /> Ethylbenzene 0200 ND 0 165 600-140 825 250 299 <br /> Xvienes(total) 0 600 ND 0 499 600-140 832 250 2 14 <br /> Surrogate a s a-Trifluorotoluene 0200 0203 600-140 101 <br /> 0 <br /> Scquois Analytical -Sacramento *Refer to end of report for text of nates and def nitrons <br /> G�GGC C � <br /> da C Schneider, Laboratory Director page 3 of 4 <br />