Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City CA 94063 <br /> 404 N Wiget Lane (650}364 9600 FAX(650)364 9233 <br /> Walnut Creek CA 94598 (925)988-9600 FAX <br /> Analytical 8f 9 Striker Avenue Suite 8 Sacramento CA 95834 (915)988 loc. <br /> 79 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (916)911 9600 FAX(9i6) 0100 <br /> (707)792-1865 FAX(707)792-0341 <br /> Ground Zero Analysis, Inc Client Project ID 96-163/Knowles Rock <br /> 1714 Main St <br /> Escal0n, CA 95320 <br /> ' Attention Justin Powers QC Sample Group 9809815-02 <br /> Reported Sep 28 1998 <br /> [: <br /> ' QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8020 <br /> ' Analyst R GECKLER <br /> ANALYTE Benzene Toluene Ethylb,,zene Xylenes <br /> QC Batch # GC0916988TEX06A <br /> Sample No 9809323-1 <br /> Date Prepared 9116198 9116198 9116198 <br /> Date Analyzed 9116/98 9116198 <br /> 9116198 9116198 911619 8 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 <br /> GCHP6 <br /> Sample Cone ug/L N D N D N D <br /> ' <br /> Cone Spiked, ug1L 10 N D <br /> 10 10 30 <br /> Matrix Spike ug/L 9 7 8 8 90 <br /> % Recovery 97 27 <br /> $8 90 90 <br /> Matrix <br /> Spike Duplicate ug/L 9 6 8 7 8 9 <br /> % Recovery gg 26 <br /> 87 89 87 <br /> Relative % Difference 1 0 1 1 1 1 <br /> 34 <br /> RPD Control Limits 025 025 0-25 <br /> 0-25 <br /> LCS Batch# GC091698BTEX06A <br /> Date Prepared 9116198 9116198 9116198 9116198 <br /> Date Analyzed 9/16198 9116198 9/16198 9116/98 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 <br /> GCHP6 <br /> Cone Spiked ug/L 10 10 10 <br /> 30 <br /> LCS Recovery, ug/L 10 9 3 96 <br /> LCS % Recovery 100 28 <br /> 93 96 93 <br /> Percent Recovery Control Limits <br /> MSIMSD 60140 60140 60140 <br /> LCSfi0 i 40 <br /> 70130 70130 70130 <br /> 70 130 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> ' Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the some reagents <br /> SEQUOI ANALYTICAL 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 /> Lucrece Tom interference the LCS recovery is to be used to validate the batch <br /> Project Manager <br /> 1 <br />