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i <br /> Submission: 2004-12-0809 <br /> Gas/BTEX by 8015M/8021 <br /> Wright Environmental Services Inc <br /> Attn.: Maria Reid <br /> 67 E 10th Street r <br /> Tracy, CA 95376-4001 <br /> Phone: (209) 833-0758 Fax: (209)832-5152 <br /> Project: 041223-M N 1 Received: 12/27/2004 14:00 <br /> M & M Builders q <br /> Site: 8111 W. 11th Street Tracy, CA <br /> i <br /> Batch QC Report <br /> Prep(s): 5030 Test(s):8021 B <br /> Matrix Spike ( MS/MSD) Water QC Batch#2004/12/29-01.05. <br /> MS/MSD F Lab.ID: 2004-12-0710=006 <br /> MS: 2004/12/29-01.05-008 Extracted: 12/29/2004 Analyzed: 12/29/200412:13 <br /> Dilution: 50.00. . <br /> MSD: 2004/12/29-01.05-009 Extracted: 12/29/2004 Analyzed: 12/29/200412'45 <br /> Dilution: 50.00 <br /> Compound Conc. u /L Spk.Leve Recovery% Limits% Flags <br /> MS MSD Sample u /L IVIS MSD RPD Rec. RPD MS MSD <br /> Benzene 2450 2470 ND 2500 98.0 98.8 0.8 65-135 20 <br /> Toluene 2350 2420 2.29 2500 93.9 96.7 2.9 65-135 20 <br /> Ethyl benzene 2230 2330 2.57 2500 89.1 93,1 4.4 65-135 20 <br /> Xylene(s) 6930 7260 5.66 7500 92.3 96.7 4.7 65-135 20 <br /> Surrogate(s) <br /> Trifluorotoluene 508 520 500 .101.5 104.0 58-124 <br /> II <br /> { <br /> i <br /> �f <br /> I <br /> 1 <br /> i <br /> j <br /> i <br /> Severn Trent Laboratories, Inc. 12/30/200412:04 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton;SCA 94566 <br /> Apart of Sevam Trent Plc Tel 925 484 1919 Fax 925 484 1096'www.stl-inc.com"CA DHS ELAP#2496 Page 9 of 10 <br /> J <br />