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4al Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> D <br /> 404 N Wiget Lane Walnut Creek CA 94598 (5 10) 988 96W FAX(510)988 9673 <br /> qwr Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 %970821-F3" <br /> 1680 Rogers Ave Matrix Liquid - <br /> -San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9708D46-02-04 Reported Sep 10, 1997 , <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> CSC Batch#: GCO82897BTEX03A GCO82897BTEX03A GCO82897BTEX03A G0082897BTEX03A GCO82897BTEX03A <br /> Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A Miraftab A Miraftab A Miraftab A Miraftab A Miraftab <br /> MS/MSD#. 9708C7104 9708C7104 970SC7104 9708C7104 9708C7104 <br /> Sample Conc N D ND N D N D N D <br /> Prepared Date. 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Analyzed Date: 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Instrument I D # GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked. 10ug/L 10ug/L 10ug/L 30ug/L 60Erg/L <br /> Result 10 10 10 28 73 <br /> MS % Recovery- 100 100 100 93 122 <br /> Dup. Result: 10 10 10 28 73 <br /> MSD %Recov• 100 100 100 93 122 <br /> RPD: 0o 00 00 00 00 <br /> RPD Limit- 0-25 0-25 0-25 0-25 0.25 <br /> LCS#: BLK082897 BLK082897 BLK082897 BLK082897 BLK082897 <br /> Prepared Date 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Analyzed Date. 8/28/97 8/28/97 8/28/97 8/28/97 8/28/97 <br /> Instrument I D.# GCHP3 GCHP3 GCHP3 GCHP3 GCHP3 <br /> Cone Spiked: 10ug/L 10pg/L 10ug/L 30u9/L 60ug/L <br /> LCS Result. 10 10 10 28 72 <br /> LCS %Recov: 100 100 100 93 120 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> SEE A 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 If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> g n <br /> interference,the LCS recovery Is to be used to validate the batch <br /> P ct Manager **MS-Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9708D46 BLA a4> <br />