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.I <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytiea819 Striker Avenue Suite B Sacramento,CA 95834 (916) 921 9640 FAX(916)921 0100 <br /> Blaine Tech Services, 166 Client Project ID Chevron 9-1452/970228-F2 <br /> 1580 Rogers Avenue MatrcK Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thle Work Order# 9703094-03, -05 Reported Mar 25, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#: GCO31097BTEX06A GCO31097BTEX06A G0031097BTEXD6A GC031097BTEX06A <br /> Analy Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. A Porter A Porter A Porter A Porter <br /> MS/MSD#.- 9702F3511 9702F3511 9702F3511 9702F3511 <br /> Sample Conc . N D N D N D N D <br /> Prepared Date 3/10/97 3/10/97 3/10/97 3/14/97 <br /> Analyzed Date. 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Instrument I D #: GCHP06 GCHP06 GCHP06 GCHP06 <br /> Cone Spiked 10ug/L 10Ng/L 10Vg/L 30pg/L <br /> Result. 95 94 94 28 <br /> MS % Recovery: 95 94 94 93 <br /> . Dup Result. 10 10 10 30 <br /> MSD% Reconâ–ş 100 100 100 100 <br /> RPD. 51 62 82 69 <br /> RPD Limit 0-25 0-25 0.25 025 <br /> LCS#. BLK031097 BLK031097 BLK031097 BLK031097 <br /> I <br /> Prepared Date 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Analyzed Date, 3/10/97 3/10/97 3/10/97 3/10/97 <br /> Instrument I D #. GCHP06 GCHP06 GCHP06 GCHP06 <br /> Conc. Spiked 10pg/L 10ug/L 10pg/L 30 fig/L <br /> LCS Result. 10 10 10 30 <br /> LCS% Recon : 100 100 100 100 <br /> 60-140 60-140 60140 60140 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,trite derent-free matrix that is analyzed using the same reagents, <br /> ISEU ALYTICAL 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 ifthe 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 /> nner <br /> anager "*MS=Matrix Spike,MSD-MS Duplicate,RPD=Relative%Difference 9703094 BLA <2> <br />