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4 4Sequoia 819 Stnker Avenue Suite 8 <br /> y Sauamento CA 95834 <br /> (916)921-9600 <br /> Analytical www <br /> (916)921-0100 <br /> sequolaiabs com <br /> Stratus Environmental Protect ARCO 548, Stockton, CA <br /> 3330 Cameron Park D,,,,,Ste 550 Sampled 6/26/00 <br /> Project Number 7v/A Received b127100 <br /> Cameron Park,CA 95682 Project Manager Tay 3ohnson <br /> Reported 7/12100 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte7 Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0G07019 Date Prepared 7/7100 Extraction Method EPA 5030E PIT <br /> Blank 0G07019-BLK1 <br /> tert-Butyl alcohol 7/7/00 <br /> Methyl tert-butyl ether ND uglE 100 <br /> Di-isopropyl ether ND " 20 <br /> Ethyl tert-butyl ether ND 20 <br /> ND " 20 <br /> Cert-Amyl methyl ether ND " <br /> Surrogate Dib romofluoramethane 20 <br /> Surrogate 12-Dichloroethane-d4 52 0 50-150 104 <br /> 50 0 470 <br /> 50-150 940 <br /> Blank OG07019-BLK2 <br /> Cert-Butyl alcohol 7110100 <br /> Methyl tert-butyl ether ND ugJ) 100 <br /> ND <br /> Di-isopropyl ether ND " 20 <br /> Wlgl,rl-_butylether20 <br /> ND 20 <br /> ylthyler _" ND "te Debromafluoromethane " �� 500 - 2 0 <br /> 500 <br /> Surrogate 1 2-Dichlor oethane-d4 500 460 50-150 1 DD <br /> 50-150 920 <br /> LCS 0607019-BS I <br /> Methyl tert-butyl ether 717/00 500 <br /> Surrogate Dibrvmofluoromethane " - 466 ugl] 70-130 93 2 <br /> Surrogate 12-Dichloroethane-d4 rF Soo 520 S0-150 10450 0 480 " <br /> 50-150 960 <br /> LLS 0G07019-BS2 <br /> Methyl terl-butyl ether 7110/00 500 Surrogate Debiomofluoramethane " 516 ug/l 70-130 103 _ <br /> 500 490 <br /> Surrogate 1 2-Dichloroethane-d4 500 450 50-150 980 <br /> " <br /> 50-150 900 <br /> Matrix Spike 0G07019-MSI W007082-07 <br /> Methyl tent-butyl ether 7/8100 500 ND <br /> Surrogate Dibromofluoromethane 56 2 60-150 112 <br /> 50 0 510 11 50-150 102 `— <br /> Surrogate 1 2-Dichloroethane-d4 SO 0 470 <br /> 50-150 940 <br /> Matrix Spike Dun OGO7019-MSD1 W007082-07 <br /> Methyl tert-butyl ether 7/8/00 500 ND <br /> Surrogate Dibromofluoromethane 500 — 57 8 ug/] 60-154 116 25 2 81 _ <br /> Surrogate 1,2-D2chloi oethane-d4 52 0 " 50-150 104 - — <br /> Soo 47 0 50450 940 <br /> Se Ana[yt�cal-Sacs amento <br /> "Refer to end of report for teat of notes and definitions <br /> Page 7 of 8 <br />