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Sequoia680 Chesapeake Dnve Redwood City CA 94063 (650) 364-%00 FAX(650)364-9233 <br /> 404 N W,get Lane Walnut Creek CA 94598 (510) 989-9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/G eostrategies Client Project ID Unocal SS#0187, 280045 85 <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 r <br /> Attention Deanna Harding Work Order# 9803524-07-10 Reported Mar 17, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Total Kleldahl Alkalinity Phosphorus <br /> Nitrogen <br /> QC Batch# 1N031198351400A IN031298040300A IN031398365300A <br /> Analy Method EPA 351 4 SM 403 EPA 365 3 <br /> Prep Method N A N A N A <br /> Analyst K Cesar K Cesar P Sandrock <br /> MS/MSD # 980352410 980352410 980352407 <br /> Sample Conc Oil 620 027 <br /> Prepared Date 3/12/98 3/12/98 3/13/98 <br /> Analyzed Date 3/12/98 3/12/98 3/16/98 <br /> Instrument I D # MANUAL MANUAL MANUAL <br /> Conc Spiked 20 mg/L 200 mg/L 1 0 mg/L <br /> Result 23 810 11 <br /> % Recovery 114 95 83 <br /> Dup Result 18 810 11 <br /> MSD % Recov 89 95 83 <br /> RPD 24 00 00 <br /> RPD Limit 0-20 0-20 0-20 <br /> LCS # LCS031298 LCS031298 LCS031398 <br /> Prepared Date 3/12/98 3/12/98 3/13/98 <br /> Analyzed Date 3/12/98 3/12/98 3/16/98 <br /> Instrument I D # MANUAL MANUAL MANUAL <br /> Conc Spiked 100 mg/L 100 mg/L 0 50 mg/L <br /> LCS Result 110 94 044 <br /> LCS %Recov 110 94 88 <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 /> 3� <br /> �QUOIA A YTICAL 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 /> 0..'thz <br /> ry <br /> Pronager ""MS=Matrix Spike,MSD=MS Dupilcate,RPD=Relative%Difference 9803523 GET <19> <br />