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660 Chesapeake Drive Redwood Cry CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek.CA 94598 (925)98&9600 FAX(925)988-9673 <br /> 4 819 Striker Avenue Suite$ Sacramento CA 95834 (9 16)921-9600 FAX(`316)921-0 100 <br /> ,,,� Analytical 1455 McDowell Blvd North Ste 13 ?etaluma,U 94954 (707)792-1865 FAX(707)792-0342 <br /> N-0 <br /> +. 1551 Industrial Road San Carlos.U 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> I G�YC W ri qw n4Y' Y 4`t� �"rw ^♦ �� ...} ...,.-..yr�mw .,.�,...�w.»?.,..rv-��`M1'-^^n"S^v ^,�a�n1Prx 1M^•-C"�n+.G�' wwr v v v v.v. rvn.S .nv... v yr rviF.wy� �a <br /> Gettter-cyan=Dublin ^' ^'Gient`project'ID -Unoca!SS#5098,'Stockton <br /> 47 Sierra Court, Suite J Matrix Liquid <br /> blin, CA 94568 <br /> Attention Deanna Harding QC Sample Group 9061562-579 Reported Jun 30, 199914'S <br /> tQUALITY CONTROL DATA REPORT <br />:--ANALYTE 1,1-0ichloro- Tnch(oro- Chloro- MTBE <br /> ethane ethene benzene <br /> Method. EPA 8010 EPA 8010 EPA 8010 EPA 8260 <br /> Analyst: P Kcsovskaya P Kosovskaya P Kosovskaya N Nelson <br /> MS/MSD <br /> Batch# 9061564 9061564 9061564 9061576 <br /> Date Prepared 6/23/99 6/23/99 6/23/99 6/28/99 <br /> Date Analyzed 6/25/99 6/25/99 6/25/99 6/28/99 <br /> Instrument I D #. HP-7 HP-7 HP-7 GC/MS-2 <br /> Conc. Spiked 20Ng/L 201Jg/L 20yg/L 5oj1g/L <br /> Matrix Spike <br /> % Recovery 85 85 75 118 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery- 95 95 105 104 <br /> Relative % <br /> Difference 11 11 33 59 <br /> 1 <br /> LCS Batch# LCS062399 LCS062399 LCS062399 LCS062899 <br />' Date Prepared 6/23/99 6/23/99 6/23/99 6/28/99 <br /> Date Analyzed 6/23/99 6/23/99 6/23/99 6/28/99 <br />'Instrument 1 D # HP 7 HP 7 HP 7 GC/MS-2 <br /> LCS % <br /> Recovery 90 90 90 116 <br /> % Recovery <br /> Control Limits 65-135 70-130 70-130 70-130 <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 LGS recovery is to be used to validate the batch <br /> jklJonne Fegley <br /> Protect Manager <br /> 9061562 GET <12> <br /> m <br />