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680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 4a)�,,,� Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> OATC Associates Inc Client Project ID Westrec Properties/KIR 5462514 0001 <br /> 1117 Lone Palm Ave , Suite B Matrix Liquid <br /> Modesto, CA 95351 <br /> Attention Jeanne Hornsey QC Sample Group 9061064-069 Reported Jun 21, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Diesel <br /> Benzene <br /> QC Batch# GCO61799 GC061799 GC061799 GC061799 SP061699 <br /> 802004A 802004A 802004A 802004A 8015EXA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA Sol5Mod <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3510 <br /> AnalystJ Minkel J Minkel J Minkel J Minkel K Grubb <br /> MS/MSD # 9061064 9061064 9061064 9061064 BLK061699 <br /> Sample Conc N D N D ND ND N D <br /> Prepared Date 6/17/99 6/17/99 6/17/99 6/17/99 6/16/99 <br /> Analyzed Date 6/17/99 6/17/99 6/17/99 6/17/99 6/17/99 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 HP-3A <br /> Conc Spliced 20lig/L 20 pg/L 20 pg/L 60 ug/L 500}tg/L <br /> Result 0 0 0 0 520 <br /> MS % Recovery 0 0 0 0 104 <br /> Dup Result 0 0 0 0 410 <br /> 49 MSD % Recov 0 0 0 0 82 <br /> RPD - - - - 24 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-50 <br /> LCS # 4LCS061799 4LCS061799 4LCS061799 4LCS061799 LCS061699 <br /> Prepared Date 6/17/99 6/17/99 6/17/99 6/17/99 6/16/99 <br /> Analyzed Date 6/17/99 6/17/99 6/17/99 5/17/99 6/17/99 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 HP-3A <br /> Conc Spiked 20ug/L 20pg/L 20Ng/L 60pg/L 500pg/L <br /> LCS Result 22 18 18 62 470 <br /> LCS % Recov 110 90 90 103 94 <br /> LCSD Result 19 17 17 61 <br /> LCSD % Recov 95 85 85 102 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <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 /> 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Dimple Sharma *" MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference <br /> Project Manager <br /> ¢ 9061064 AAA <3> <br />