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* ( , Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-96W FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 96W FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles .x Client Project ID Former Unocal 2859, 280054 85 <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9803390-02-06 Reported Mar 17, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Kjeidahl Total Dissolved Phosphorus <br /> Nitrogen Solid <br /> QC Batch# IN031198351400A IN031198160100A IN0311983653MA <br /> Analy Method EPA 351 4 EPA 160 1 EPA 365 3 <br /> Prep Method N A. N A_ N A <br /> Analyst. K Cesar W Loo P Sandrock <br /> MS/MSD # 980339110 980339110 980339003 <br /> Sample Conc 1 3 1200 076 <br /> Prepared Date 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date 3/11/98 3/12/98 3/16/98 <br /> Instrument I D # MANUAL MANUAL MANUAL <br /> Conc Spiked 20 mg/L 500 mg/L 5 0 mg/L <br /> Result 17 1700 41 <br /> �MS % Recovery 79 100 67 <br /> Dup Result 18 1700 42 <br /> MSD % Recov 84 100 69 <br /> RPD 57 00 24 <br /> RPD Limit 0-20 0-20 0-20 <br /> LCS # LCS031198 LCS031198 LCS031198 <br /> Prepared Date 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date 3/11/98 3/12/98 3/16/98 <br /> Instrument I D # MANUAL MANUAL MANUAL <br /> Conc Spiked 100 mg/L 500 mg/L 0 50 mg/L <br /> LCS Result 120 520 040 <br /> LCS % Recov .. 120 104 80 <br /> 75-125 75-125 75-125 <br /> LCS 80-120 80-120 80-120 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> �EQUOIA AbIALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory <br /> Pr ject Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803390 GET <7> <br />