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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma,CA 94954 <br /> a_ ) (707)792 186� <br /> IJW nalyfic FAX(707)792 0342 <br /> www sequoialabs conn <br /> URS Corp-Sacramento Project Arco Site 5469 Stockton CA P403099 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36605 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/06/04 17 16 <br /> Conventional Chemistry Parameters by APH AIEPA Methods - Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %REL RPD <br /> An�iyte Result Limit Units Leel Result °/6RFC Limits RPD Limit Notes <br /> Batch 4030244-General Preparation <br /> Laboratory Control Sample(4030244-BSI) Prepared&Analyzed 03/10/04 <br /> Total Organic Carbon 8990 200 ugfl 10000 90 80-120 <br /> Matrix Spike(4010244-MSI) Source P401046-01 Prepared&Analyzed 03/10/04 <br /> Total Organic Carbon 41100 1600 ugA 40000 5500 89 75-125 <br /> Matrix Spike Diu 14030244-MSD1) Source P403046-01 Prepared&Analyzed 03/10/04 <br /> Total Organic Carbon 41 500 1600 U0 40000 5500 90 75-125 1 20 <br /> Batch 4030245-General Preparation <br /> — - zed <br /> Blank(4030245-BLKI Prepared$Analyzed 03/10/04 <br /> Total Organit,Carbon ND 200 ug/l <br /> Laboratory Control Sample(4010245-SSI) Prepared&Anal zed 03/10/04 <br /> 0atal Organic Carbon 8860 200 ugll 10000 89 80-120 <br /> rix Spike(4030245-MSI) Source P401045.01 Prepared& 4naly2ecl 03/1,0104 <br /> Total Organic Carbon 41900 1600 ug11 40000 6900 8b 75-125 <br /> Matrix Spike Dap(4030245-MSD1) Source P403045-01 Prepared&Analyzed 03/10/04 <br /> Total Organic Carbon 41800 1600 ug/l 40000 6900 87 75-125 02 20 <br /> Batch 4030307-General Preparation <br /> Blank <br /> Analyzed 03/11/04 <br /> ( _ ) _ Prepared&A ._. ,_..,_._. <br /> Total Dissolved Solids 20000 10000 ugft <br /> uoia Analytical-Petaluma The results to this report upph to the samples atialy--ed it, ascot dance xith the chain <br /> of ciotodi document Unless othermw stated r esults ar e repot ted on a het rieight <br /> ha%ts This analitic ul ieportnxrst he iepi odticcd in its entrrety <br /> Page 30 of 35 <br />