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n <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> L 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Oaler-Ryan - Dublin Client Project Ib 3202 W Hammer Ln , Stockton <br /> 6747 Sierra Court, Suite J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Doug Lee OC Sample Group 812-0639 Reported Dec 16, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Aldrin Dieldrin Heptachlor Sulfide Reactive Reactive Total Cyanide <br /> Sulfide Cyanide <br /> Method EPA 8080 EPA 8080 EPA 8080 EPA 376 1 SW 846 SW 846 EPA 335 2 <br /> Analyst - - K Anderson - E Feten <br /> MS/MSD <br /> Batch# BLK121098 BLK121098 BLK121098 8120639 - 9812500-1 <br /> Date Prepared 12/10/98 12/10/98 12/10/98 12/13/98 - 12/10/98 <br /> Date Analyzed 12/10/98 12/10/98 12/10/98 12/13/98 - 12/10/98 <br /> Instrument I D # GCHP 4B GCHP 46 GCHP-46 Manual - FIA-1 <br /> Conc Spiked 0 10 pg/L 0 20 Pg/L 0 10 ug/L 10 mg/L - 0 20 mg/L <br /> Matrix Spike <br /> % Recovery 45 64 52 88 - _ 85 <br /> iMatrix Spike <br /> Duplicate % <br /> Recovery 59 87 69 98 - 94 <br /> Relative% <br /> Difference 27 31 28 95 - - 57 <br /> LCS Batch# - - - LCS121398 BLK121098 BLK121098 LCS 121098 <br /> Date Prepared- - 12/13/98 12/10/98 12/10/98 12/10/98 <br /> Date Analyzed - 12/13/98 12/10/98 12/10/98 12/10/98 <br /> Instrument I D # - Manual - FIA-1 <br /> LCS % <br /> Recovery- - - - 100 55 15 115 <br /> ° Recovery <br /> Control Limits: 40-140 40-140 40-140 80-120 15-120 50-120 80-120 <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 /> #1210, & #1624 fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> V((,4LY� w,(.�� the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recoveryis to be used to validate the batch <br /> Julianne Fegley <br /> Project Manager <br /> 8120639 GET <7> <br /> i <br />