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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 /> 1%0 Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> 10chstone Development Client Project ID Chevron #9-2033 <br /> P O Box 2554 Matrix Solid <br /> Santa Rosa, CA 95405 <br /> Attention Jeff Monroe QC Sample Group 6090437-444 Reported Sep 12, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1 Dichloro- Trichloro- Chloro- Diesel Oil& <br /> ethene ethene benzene Grease <br /> QC Batch# GCO91096 GCO91096 GCO91096 SP091096 SP091096 <br /> 801007A 801007A 801007A 8015EXA 5520MDA <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 EPA 8015 SM 5520 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 3550 SM 5520 <br /> Analyst P Horton P Horton P Horton J Dinsay D Newcomb <br /> MS/MSD # 6082025 6082025 6082025 6090441 6090438 <br /> Sample Conc N D ND N D 330 mg/kg N D <br /> Prepared Date 9/10/96 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Analyzed Date 9/10/96 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Instrument I D # HP-7 HP-7 HP 7 HP-3A Manual <br /> Conc Spiked 100 fug/Kg 100 fig/Kg 100 fug/Kg 10 mg/kg 5000 mg/kg <br /> Result 55 69 290 4800 <br /> MS % Recovery 55 69 - 95 <br /> Wup Result - 59 73 290 4900 <br /> D % Recov 59 73 97 <br /> RPD - 70 56 00 20 <br /> RPD Limit 025 0-25 0-25 0-50 0-30 <br /> LCS # LCS091096 LCS091096 LCS091096 LCS091096 BLK091096 <br /> Prepared Date 9/10/96 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Analyzed Date 9/10/96 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Instrument I D # HP-7 HP-7 HP-7 HP-3A Manual <br /> Conc Spiked 10 gg/L 10 fig/L 10 ftg/L 10 mg/kg 5000 mg/kg <br /> LCS Result 99 99 10 11 4600 <br /> LCS % Recov 99 99 104 110 92 <br /> 60-140 60-140 60140 50-150 60-140 <br /> LCS <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 /> S QUOIA ANALYTICAL, #1271 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 /> 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 /> Melissa A Brewer **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference <br /> Client Services Representative <br /> 6090441 TOU <167 <br />