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STLSubmission: 2005-07-0597 <br /> Total Lead <br /> TRC Alton Geoscience- Irvine <br /> Attn.: Anju Farfan <br /> 21 Technology Drive <br /> Irvine, CA 92718 <br /> Phone: (949) 341-7440 Fax: (949)753-0111 <br /> Project: 41050001 FA20 Received: 07/21/2005 14:20 <br /> Conoco Phillips# 01205 <br /> Site: 16470 Cambridge Dr. Lathrop <br /> Batch QC Report` <br /> Prep(s) 3010A <br /> Tests} 60106. <br /> Laboratory Control Spike Wafer <br /> ,..QC Batch#2005/08/01708-15 <br /> LCS '2005/08/0108.15"027 Extracted 08/01/2005 Analyzed 08102/20051.1:58; ' <br /> LCSD 20(}5108101-08J5-'W8Extracted 08/01/2005 Analyzed 08/D2/2005 12:01 , <br /> Compound Conc. mg/L Exp.Conc_ Recovery% RPD Ctrl.Limits % Flags <br /> LCS LCSD LCS I LCSD % 1 Rec. I RPD LCS LCSD <br /> Lead 0.526 0.534 0.500 105.2 106.8 1.5 80-120 20 <br /> Severn Trent Laboratories, Inc. 08/02/2005 14:47 <br /> STL San Francisco'1220 Quarry Lane,Pleasanton,CA 94566 <br /> Apart of Sevem Trent Plc Tel 925 484-1919 Fax 925 484 1096'www.sti-ine.com"CA DHS FLAP#2496 Page 23 of 23 <br />