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a ' 680 Chesapeake Dnve Redwood City CA 94063 (650) 364 9600 FAX (650) 364 9233 <br /> Sequoia <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 FAX (510}988 9673 <br /> �III� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 {916} 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /971124-S1 <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- 1,2,4-Trtohloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC 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 WB112697 WB112697 WB 112697 <br /> Sample Conc 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 l D # H5 H5 H5 H5 <br /> Conc Spiked 200 ug/L 200 jug/L 200 pg/L 200pg/L <br /> Result 121 133 122 68 <br /> MS % Recovery 61 67 61 34 <br />• Dup Result- 131 139 130 72 <br /> MSD % Recov 66 70 65 36 <br /> RPD- 79 44 63 57 <br /> RPD Limit 030 0-30 030 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 /> Conc. Spiked 200 Mg/L 200 jig/L 200ug/L 200kg/L <br /> LCS Result 165 165 153 51 <br /> LCS % Recov .. 83 83 77 26 <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> • SEQUOIA ANALYTIC L 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 tf <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> S-1/( [interference,the LCS recovery is to be used to validate the batch <br /> Peggy enner "*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manag Page 2 of 3 9711 F41 SLA 48' <br />