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1455 McDowell Dtvd North Ste D <br /> Sequoia Petaluml CA 94954 <br /> 4��� Tical (707)792-1805 <br /> g CAX(707)792-0342 <br /> www sequovtI ibS t.om <br /> URS Corp-S4cramc.nro Prolcct Arco Site 5469 Stockton,CA P403099 <br /> 2870 Gateway Oaks Drive State 300 Project Number WR36605 Reported <br /> Sacramento CA 95833 Project Manager Jay Johnson 04/06/04 17 16 <br /> Conventional Chemistry Parameters by APHA/EPA Methods- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Sourt.e 01�RFC RPD <br /> Amlyte Rt,ull Limit Lints Levt.l Result %RFC Limits RPD Limit Notes <br /> Batch 4030201 -General Preparation <br /> Blank(4030201-13LK1) Prepared&Analyzed 03/15/04 <br /> Ortliopliosph tte as P ND 56 ug/l <br /> Laboratory Control Sample(4030201-BSI) Prepared&Analyzed 03/15/04 <br /> Orthophosphate as P 554 50 ug/l 500 111 80-120 <br /> Matrix Spike 4030201-iVISI) Source P403098-01 Prepared&Analyzed 03/15/04 <br /> Orthophosphate as P 612 50 ug/l 526 68 103 75-125 <br /> Matrix Spike Dup(403020I-MSD I) Source P403098-01 Prepared&Analyzed 03/15/04 <br /> Orthophosphate as P h14 50 ugA 526 68 104 75-125 03 20 <br /> Batch 4030208-General Preparation <br /> Blank(403020_8-BLK l) Prepared&Analyzed 03/04/04 <br /> ous {ion ND 100 ug/l <br /> oratory Control Sample(4030208-13SI) Prepared&Analyzed 03/04/04 <br /> Ferrous Iron 742 100 _ug/l 800 93 80-120 <br /> Matrix Spike(4030208-MS1). _ _ Source_P403099-01 Prepared&Analyzed 03/04/04 <br /> herrOtlS Iron 1300 100 ugtl 870 480 94 75-125 _ . <br /> Matrix Spike Dup(4030208-MSD1) Source P403099-01 Prepared&Analyzed 03/04/04 <br /> Ferrous Iron t 20 100 ug/1 _ 870 480 97 75-125 2 20 <br /> Batch 4030244-General Preparation <br /> Blank(4030244-BLKI) Prepdred&Analyzed 03/10/04 <br /> Total Organic Carbon ND 200 ug/l <br /> uota Analytical-Petaluma Tlri i eculte in this d epori upph io Ort surnplec anali_ed in a[t orlon,t n ith the charm <br /> ofermodi docwrretdr Unless othediim,stated recuhc ate depoired otd u net itrglrt <br /> fiusts Tlyds urral)trrul depart nurst he rt produced ur dts eutrrett <br /> Page 29 of 35 <br />