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~1` A' , <br /> Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988%73 <br /> frlll� Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Project ID Unocal SS#0187, 280045 85 <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9803524-07-10 Reported Mar 17, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Anajyte Nitrite Sulfate Nitrate Total Dissolved <br /> Solids <br /> QC Batch# IN0312983000ACA ING312983000ACA INO3119830WA IN031398160100A <br /> Analy Method EPA 300 0 EPA 300 0 EPA 300 0 EPA 160 1 <br /> Prep Method N A. N A N A. N A <br /> Analyst J Hills J Hills J Hills W Loo <br /> MS/MSD # 980369104 980369104 980322901 980337601 <br /> Sample Conc N D 10 30 1400 <br /> Prepared Date 3/12/98 3/12/98 3/11/98 3/13/98 <br /> Analyzed Date 3/13/98 3/13/98 3/11/98 3/14/98 <br /> Instrument 1 D # INIC1 INIC1 INIC1 MANUAL <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 10 mg/L 500 mg/L <br /> Result 10 11 38 1700 <br /> % Recovery 100 100 80 60 <br /> Dup Result 10 12 39 1700 <br /> MSD % Recov 100 110 90 60 <br /> RPD 00 87 26 00 <br /> RPD Limit 0-20 0-20 0.20 0-20 <br /> LCS # LCS031298 LCS031298 LCS031198 LCS031398 <br /> Prepared Date 3/12/98 3/12/98 3/11/98 3/13/98 <br /> Analyzed Date 3/13/98 3/13/98 3/11/98 3/14/98 <br /> Instrument 1 D # INIC1 INIC1 INIC1 MANUAL <br /> Conc Spiked 10 mg/L 10 mg/L 10 mg/L 500 mg/L <br /> LCS Result 10 11 94 440 <br /> LCS % Recov 100 110 94 88 <br /> 75-125 75-125 75-125 75-125 <br /> LCS 80-120 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 /> ^� <br /> 1.101 NALYTICAL 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 /> egary <br /> Pr ct Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9803523 GET <20> <br />