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680 Chesapeake Drive 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 /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> 11W <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /971124-SI <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 F41-01 Reported Dec 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2-Chlorophenol 1,4-Dlchloro- N-Nitroso-Dl- <br /> benzene N propylamine <br /> OC Batch# MS1126978270EXB MS1126978270EXB MS1126978270EXB MS1126978270EXB <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 # WB112697 WEI112697 W6112697 WB112697 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 11/26/97 11/26/97 11/26/97 11/26/97 <br /> Analyzed Date 12/1/97 12/1/97 12/1/97 12/1/97 <br /> Instrument I D # H5 H5 H5 H5 <br /> Cone Spiked 200 ug/L 200 jig/L 200pg/L 200ug/L <br /> Result 76 104 98 117 <br /> MS % Recovery 38 52 49 59 <br /> • Dup. Result 79 113 110 126 <br /> MSD % Recov 40 57 55 63 <br /> RPD 39 83 12 74 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS # LCS120197 LCS120197 LCS120197 LCS120197 <br /> Prepared Date. 12/1/97 12/1/97 12/1/97 12/1/97 <br /> Analyzed Date 12/1/97 12/1/97 12/1/97 12/1/97 <br /> Instrument I D #• F4 F4 F4 F4 <br /> Cone Spiked 200 ug/L 200pg/L 200pg/L 200pg/L <br /> LCS Result 82 154 155 157 <br /> LCS % Recov 41 77 78 79 <br /> LCS <br /> Control Limits 12-110 27-123 3697 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 /> • SEQUOIA ANALYTICAL 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 H <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> ar interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Mana r Page 1 of 3 9711F41 BLA a7> <br />