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` 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia <br /> ,t 404 N W1get Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> filly Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921.9600 FAX(916)921-0100 <br /> 3455 McDowell Blvd North,Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> f { „miR irn•�4N S `V v i' {nv��' nlv.{?J!4 irm}��}n}vY v}.}ry}rvs i Ynn NrA4vrvmir w.ii {pr r. Yui£wY <br /> } ?fes h­uh}ki<m.wrr.+n Tri , 4r> �i'Z' {% Or IXv. Or w>v4 %vL.%.ry 1v 44},Yr h4 v.{,.A `wrR r4}w1..v{hv <br /> ITler-Ryan-bubl'n Client Praiect ID wUin6 l SS#0123,Bracy <br /> 747 Sierra Court, Suite J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding OC Sample Group 8121234-240 Reported Dec 3i, 1998 <br /> ..w�`�,`n�x ec t..MN..'�� ,•eeiv'`,.a...M.,.„- viC -X'<.>a.,,'. �oi`,rh n:W��} rk,eo,.�`^.H" �w`n .�,.o h,«R";`+{..w~�•r4+r,,.~Y,t+9: r• a.Rnw.a.a t+s,,,�„d Mi„ M i�i',. �f✓ •,.nA .4.s..-}} <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dichloro- Trichloro- Chloro- Diesel MTBE <br /> ethene ethane benzene <br /> Method EPA 8010 EPA 8010 EPA 8010 EPA 8015 EPA 8260 <br /> Analyst' P Kosovskaya P Kosovskaya P Kosovskaya K Grubb N Nelson <br /> MS/MSD <br /> Batch#. 8121237 8121237 8121237 BLK121698B 8121020 <br /> Date Prepared. 12/22/98 12/22/98 12/22/98 12/16/98 12/21/98 <br /> Date Analyzed. 12/22/98 12/22/98 12/22/98 12/17/98 12/21/98 <br /> Instrument I D #- MP-6 HP-6 HP-6 HP-3A GC/MS-2 <br /> Conc Spiked 20 ug/L 20 ug/L 20 yg/L 500 ug/L 50 Ng/L <br /> Matrix Spike <br /> % Recovery, 75 80 75 94 96 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 90 90 80 94 108 <br /> Relative% <br /> Difference 18 12 6 5 00 12 <br /> LCS Batch#. LCS122298 LCS122298 LCS122298 LCS121698B LCS122898 <br /> Date Prepared 12/22/98 12/22/98 12/22/98 12/16/98 12/28/88 <br /> Date Analyzed 12/22/98 12/22/98 12/22/98 12/18/98 12/28/98 <br /> Instrument I.D.#. HP-6 HP-6 HP-6 HP-3B GC/MS-2 <br /> LCS % <br /> Recovery: BO 75 80 74 118 <br /> Recovery <br /> Control Limits- 65-135 70-130 70-130 35-125 70-130 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the some 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 recoveaf is to be used to validate the batch <br /> Julianne Fegley <br /> Project Manager <br /> 8121234 GET <18> <br />