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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9673 <br /> Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> 404 N Wiget Lane <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles Client Project ID Former Unocal 2859, 280054 85 v <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order # 9803391-07-10 Reported Mar 17, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Alkalinity Nitrite Nitrate Sulfate <br /> QC Batch# IN031098040300A IN0309983000ACA IN0309983000ACA IN0309983000ACA <br /> Analy Method SM 403 EPA 300 0 EPA 300 0 EPA 300 0 <br /> Prep Method N A N A N A N A. <br /> Analyst K Cesar J Hills J Hills J Hills <br /> MS/MSD # 980339006 980339109 980339109 980339109 <br /> Sample Conc 240 N 0 40 130 <br /> Prepared Date 3/10/98 3/9/98 3/9/98 3/9/98 <br /> Analyzed Date 3/10/98 3/9/98 3/9/98 3/9/98 <br /> Instrument 1 D # MANUAL INIC1 INIC1 INIC1 <br /> Conc Spiked 200 mg/L 10 mg/L 10 mg/L 10 mg/L <br /> Result 420 11 49 140 <br /> S % Recovery 90 110 90 100 <br /> � <br /> Dup Result 440 10 49 140 <br /> MSD % Recov 100 100 90 100 <br /> RPD 47 95 00 00 <br /> RPD Limit. 0-20 0-20 0-20 0-20 <br /> LCS # LCS031098 LCS031098 LCS031098 LCS031098 <br /> Prepared Date 3/10/98 3/9/98 3/9/98 3/9/98 <br /> Analyzed Date 3/10/98 3/9/98 3/9/98 3/9/98 <br /> Instrument I D #- MANUAL INIC1 INIC1 INIC1 <br /> Conc Spiked 100 mg/L 10 mg/L 10 mg/L 10 mg/L <br /> LCS Result 94 11 93 99 <br /> LCS % Recov : 94 110 93 99 <br /> Wffm 75-125 75-125 75-125 75-125 <br /> LCS 80-120 80-124 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 /> VtManager <br /> YTICAL preparation,and analytical methods employed for the samples The matnx 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 /> *'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803390 GET <12> <br />