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Sequoia 819 Striker Avenue,S 8 <br /> Sauamentp CA 95858 34 <br /> (916)921 <br /> FAX(916)921-0-96OO <br /> 00 <br /> lowAnalytical wwwsequOLftwbs.wrn <br /> 0 <br /> Dtlta Environmental Consultants-Cameron Park Project Arco 6100,Tracy,CA Sampled 8/24100 to 8/28/00 <br /> 3330 Cameron Park Dr Project Number NIA Received 9/5/00 <br /> Cameron Park.CA 95682 Protect M.aaa er Jay Johnson Rcporlacl 9/21 97/00 <br /> BTEX by EPA Method 826OA/Qaalrty Control <br /> Segmoxw AuOytical-Sacramento <br /> Date Spike Sw-nple QC Reporting Limit Recov RPD RPD <br /> [Analyte Analyzed LeveI Result Result Units Recov Limits % Limit % Notes* <br /> Bm h: Q990112 Date Prepared 9/6100 Extraction Method EPA 50308 LMeOP11 <br /> Blank 0090112-BLK1 — <br /> Benzcnc 917/00 ND mg/kg 0.100 <br /> Toluene ND 0100 <br /> Ethylbenzene " NA " 0100 <br /> xylcncs(total) " ND " 0100 <br /> Surrogate 1,2-DC 44 " 2 SO 2 63 600-140 105 <br /> Surrogate Toluene-d8 " 250 289 600-140 116 <br /> Surrogate 4-BFB " 250 242 600-140 968 <br /> LCS 0090112-1;S 1 <br /> Benzene 917/00 250 264 mg/kg 600-140 106 <br /> Toluene 250 329 600-140 132 <br /> Surrogate 1,2-DCA-d4 -- " 250 2 74 600-140 110 <br /> Surrogate Toluene-d8 " 250 2 90 600-140 116 <br /> gate 4-BFB 2 SO 2S2 600-140 101 <br /> Matrix Spike 00201 tg-MS 1. 5009037-01 <br /> Benzene 9/7/00 2 50 ND 227 MS/kg 600-140 908 <br /> Toluene - �- 250 ND 2 93 600-140 117 <br /> Surrogate 1,2-DCA44 _ 7.50 245 600-140 980 -- <br /> Surrogale Toluene-d8 250 260 600-140 104 <br /> Surrogate 4-BFB 250 2-42 I' 600-140 928 <br /> Matrix Spike Dino 0090112-MSD1 S009037-01 <br /> Benzene 917/00 2 50 ND 248 mg/kg 600-140 99.2 25 0 884 <br /> Toluene 2 50 ND 3 12 600-140 125 25 0 6 61 <br /> Surrogate 1,2--DC,1-d4 250 261 600-140 104 -W <br /> Surrogate Toluene-d8 250 274 600-140 110 <br /> Surrogate 4-BFB 250 2 49 600-140 996 <br /> a Analyncal-Sacramento *Refer to end ofreport for text ofnotes and defrnttrom <br /> Page 15 of 20 <br /> EE/ZT d Dt1SidIonO3S WU22 68 80. LZ d3S <br />