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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 (925)988 9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921.0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-034Z9612 <br /> 1551 Industrial Road San Carlos CA 94070 41 I I (650)232-9600 FAX(650)232 9612 <br /> Pinnacle Client Project 10 Arco #6020, Manteca ' <br /> 3939 Cambridge Road Matrix Solid <br /> Cameron Park, CA 95682 <br /> Attention Joel Coffman QC Sample Group 9050030-047 Reported May 5, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes MTBE Lead ' <br /> Benzene _ <br /> OC Batch# SPOSO499 SPOS0499 SP050499 SP050499 SP050499 ME050499 ' <br /> 8020EXA 8020EXA 8020EXA 8020EXA 8260EXA 3050MDA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8260 EPA 7420 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3050 <br /> Analyst C Westwater C Westwater C Westwater C Westwater N Nelson T Le ' <br /> MS/MSD # 9042696 9042696 9042696 9042696 9050031 9050030 <br /> Sample Cone N D N D N D N D N D ND <br /> Prepared Date 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 5/4/99 5/5/99 5/4/99 <br /> Instrument I D # HP-4 HP-4 HP4 HP-4 GC/MS-2 MV-1 <br /> Cone Spiked 0 80 mg/Kg 0 80 mg/Kg 0 80 mg/Kg 2 4 mg/Kg 2500pg/Kg 50 mg/Kg <br /> Result 086 074 - 078 26 2,900 42 <br /> MS % Recovery 108 93 98 108 116 84 <br /> Dup Result 091 078 081 27 2,900 40 <br /> J`MSD-%-RecoV — -114-- - 98 - -101 - 113 116- 80 <br /> RPD 56 53 38 38 00 49 a <br /> RPD Limit 0-20 0-20 0-20 0-20 0-25 0-20 <br /> 1 L s yr{ n v n ` .xry ry n . ` , .-• 1 . <br /> LCS # 4LCS050499 4LCS050499 4LC8050499 4LCS050499 LCS050499 VLCS050499 <br /> Prepared Date 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 ' <br /> Analyzed Date 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 5/4/99 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 GC/MS-2 MV-1 <br /> Cone Spiked 0 80 mg/Kg 0 80 mg/Kg 0 80 mg/Kg 2 4 mg/Kg 2500 jig/Kg 50 mg/Kg <br /> LCS Result 093 077 080 27 2,900 47 <br /> LCS % Recov 116 96 100 113 116 94 <br /> LCS 50-150 50-150 50-150 50-150 70-130 80-120 <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 /> SEQUOIA ANALYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> -� 4inte'Mrence, <br /> with known quantities of specific compounds and subjected to the entire analytical procedure It <br /> very of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> the LCS recove is to be used to validate the batch <br /> Melissa A Brewer Matrix Spike, MSD=IVIS Duplicate,RPD=Relative%Difference <br /> Project Manager <br /> 9050030 PPP <24> <br />