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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233
<br /> Sequoia b04 N Wlget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673
<br />' 819 Striker Avenue.Suite 8 Sacramento CA 95834' (9t6)921-9600 FAX(916)921-0104
<br /> 44W Analytical
<br /> 1455 McDowell Blvd North.Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342
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<br /> Ge er-t�yan- uilinIlentralect�I� lFnocaSS#UZ87,Stocktont
<br /> 6747 Sierra Court, Suite J Matrix Liquid
<br /> Dublin, CA 94568
<br /> {�Attentlon• Deanna Harding QC Sample Group 9020651-668 Reported Feb 16, 1999 ,
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Benzene Toluene Ethyl Xylenes
<br /> Benzene
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020
<br /> Analyst: C Westwater C Westwater C Westwater C Westwater
<br />' MS/MSD
<br /> Batch#: - - - -
<br />' Date Prepared: - - - -
<br /> Date Analyzed:
<br /> Instrument I.D.#. - - - -
<br />' Conc. Spiked: - - - -
<br /> Matnx Spike
<br /> °�b Recovery" - - - -
<br /> Matrix Spike
<br /> Duplicate %
<br /> Recovery: - - - -
<br /> Relative%
<br />' Difference.
<br /> �� i�^',.,a z f, c.,,,�Y{r r },.'? +�Y v}+,- ? « a L+,�v.. ,•g..s,o,tivn,s,.�';'%.,,.'Nw,nww.,.,,.w y"�v f3S V{
<br /> wx.....a"a+.,,�;av
<br />' LCS Batch#: SLCS021199 SLCS021199 SLCS021199 SLCS021199
<br /> Date Prepared: 2/11/99 2/11/99 2/11/99 2/11/99
<br /> Date Analyzed: 2/11/99 2/11/99 2/11/99 2/11/99
<br /> Instrument I.D.#: HP-5 HP-5 1-113-5 HP-5
<br />' LCS %
<br /> Recovery: 95 95 98 96
<br />' Recovery
<br /> Control Limits: 70-130 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 /> 6EQUOIA 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. ffythe recovery of analytes from the matrix spike does not fall within specified control limits due to matrix
<br /> interference,the LCS recove is to be used to validate the batch
<br /> nne Fegley
<br />' Project Manager
<br /> 9020651.GEf <25>
<br />
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