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r 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Iwo Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Protect ID Chevron 9-2033 /971117-M2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 C66-01 Reported Dec 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2-Chlorophenol 1,4-Dchloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch# MS1118978270EXA MS1118978270EXA MS1118978270EXA MS1118978270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst E Manuel E Manuel E Manuel E Manuel <br /> MS/MSD # 971189103 971189103 971189103 971189103 <br /> Sample Conc ND ND N D N D <br /> Prepared Date 11/18/97 11/18/97 11/18/97 11/18/97 <br /> Analyzed Date 11/18/97 11/18/97 11/18/97 11/18/97 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 200pg/L 200ug/L 200,ug/L 200 ug/L <br /> Result 90 159 133 155 <br /> MS % Recovery 45 80 67 78 <br /> Dup Result 95 161 137 165 <br /> MSD % Recov. 48 81 69 83 <br /> RPD 54 13 30 63 <br /> RPD Limit 0-30 0-30 030 030 <br /> LCS#. LCS112497 LCS112497 LCS112497 LCS112497 <br /> Prepared Date. 11/24/97 11/24/97 11/24/97 11/24/97 <br /> Analyzed Date 11/25/97 11/25/97 11/25/97 11/25/97 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 200pg/L 200Ng/L 200ug/L 200 ug/L <br /> LCS Result 86 150 131 145 <br /> LCS %Recov .. 43 75 66 73 <br /> LCS <br /> Control Limits 12-110 27-123 36-97 41-116 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEC Oi <br /> LYTICAL 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 /> Peg y **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Prod t Manager Page 1 of 3 9711066 BLA <7> <br />