Laserfiche WebLink
Sequoia 680 Chesapeake Drtve Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wrgec Lane Walnut Creek CA 94598 (510)988 9600 FAX(510)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(9i6)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707)792-0342 <br />' EA Engineering Client Project ID Exxon 7-3942, 5153942 1300 <br /> 3468 Mt Diablo Blvd, Ste 6100 <br /> Lafayette, CA 94549 <br />' Attention Chrlsta Marting QC Sample Group 9805E43-24 Reported Jun 10 1998 <br /> QUALITY CONTROL DATA REPORT <br />' Matrix Liquid <br /> Method EPA 8015 <br /> Analyst N Herrera <br />' ANALYTE Gasoline <br /> QC Batch # GCO60198E3TEX02A <br />' Sample No GW9805C77-16 <br /> Date Prepared 611198 <br /> Date Analyzed 611198 <br />' Instrument I D # GCHP02 <br /> Sample Cone , uglL N D <br /> Cone Spiked uglL 250 <br />' Matrix Spike, uglL 210 <br /> % Recovery 84 <br /> Matrix <br /> Spike Duplicate, ug1L 200 <br /> % Recovery 80 <br /> Relative % Difference 49 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWBLK06019SABS <br /> Date Prepared 611198 <br /> Date Analyzed 611198 <br /> Instrument I D # GCHP02 <br /> Cone Spiked, uglL 250 <br /> LCS Recovery, uglL 230 <br /> LCS % Recovery 92 <br /> Percent Recovery Control Limits <br /> MSJMSD 60140 <br /> LCS 70130 <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 /> SEQUOIA 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 /> I <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Richard Herling interference the LCS recovery is to be used to validate the batch <br /> Project Manager <br />