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1455 McDowell Blvd North Ste D <br /> SequoiaPevilumi,CA 94954 <br /> WoAnalytical FAX(707)792-0342 <br /> www sequoial sbs corn <br /> i <br /> URS Corp-Sacramento Prolect Arco Site 5469,Stockton CA P403099 <br /> 2870 Gateway Oaks Dnve SUltc 300 Project Number WR36605 Reported <br /> SALrarnento CA,95833 Project Manager lay Johnson 04/06/04 17 16 <br /> Conventional Chemistry Parameters by APHA/EPA Methods - Quality Control <br /> Sequoia Analyheal- Petaluma <br /> Reporting Spike Soune 'NREC RPD <br /> Amlyte Result Limit Units level Result °'oREC Limos RPD Limit Notes <br /> Batch 4030307-General Preparation <br /> Laborator Control Sample(4030107-BSI) Pre aced&Anal zed 03/11/04 <br /> Total Dissolved Sohda 714000 10000 tig/l 742000 96 80-120 QB01 <br /> Duplicate(4030307-DUP1) Source P401099-01 Prepared&Analyzed 03/11/04 <br /> Total Dissolved Solids 947000 17000 ug/] 900000 5 35 QB01 <br /> Batch 4030308-General Preparation <br /> Blank 4030308-8LK1 Pre ared&Ana1 zed 03/11/04 <br /> Total Dissolved Solids 24000 10000 ug/I <br /> Laboratory Control Sample(4010308-BSI) _ _ Prepared&Analyzed 03/11/04 <br /> Total Dissolsed Solids 656000 10000 ug/I 742000 88 80 120 <br /> Duplicate rcate( __. -. P1) Source P403129-25 Prepared&Analyzed 03/11/04 <br /> t'rl Dissolved Solids 1850000 12000 ug/I 1900000 3 35 QB01 <br /> ch 4030513-General Preparation <br /> Blank(4030511-BLK1) Prepared&Analyzed 03/18/04 <br /> Chemical Oxygen Demand SID 20000 ugfl <br /> Laboratory Control Sample(4030513-BS1) Prepared&Analyzed 03/18/04 <br /> Chemical Oxygen Demand 246000 20000 ug1I 250000 98 80-120 — <br /> Matrix Spike 4030513-MS1 Source P403339-01 Pre ared&Anal zed 03/18/04 <br /> Chemical Oxygen Demand 1160000 40000 ug/1 500000 630000 106 75-125 <br /> Ouoia Analytical-Petahtina Tlr( iesults in this Pepe)+t upph to the rumples arrah=ed in ac(0)dance arch the chain <br /> ofrustodr document Unless ir7heiNrse stetted results are iepmli l nit u saet iserght <br /> basis Tins anahtic al ielmi t nitist be i eproduced in its entuell <br /> Page 31 of 35 <br />