Laserfiche WebLink
' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988 9600 FAX(510)988-9673 <br /> 1319 Striker Avenue Suite 8 Sacramento CA 95834 (916)9Z1-9600 FAX(916)921-0100 <br /> �r(I17� 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 1304 <br /> 3468 Mt Diablo Blvd, Ste 8100 <br /> Lafayette, CA 94549 <br />' Attention Chnsta Marting QC Sample Group 9805E41-02 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 # GCO60398BTEX02A <br />' Sample No GW9805C41-11 <br /> Date Prepared 6/3/98 <br /> Date Analyzed 613198 <br />' Instrument 1 D# GCHP02 <br /> Sample Cone ug/L N D <br /> Cone Spiked uglL 250 <br /> Matrix Spike, ug/L 240 <br /> % Recovery 96 <br /> Matrix <br /> Spike Duplicate ug/L 270 <br /> % Recovery 108 <br /> Relative % Difference 12 <br />' RPD Control Limits 0-25 <br /> LCS Balch# GWBLK060398A <br />' Date Prepared 6/3198 <br /> Date Analyzed 6/3/98 <br /> Instrument I D # GCHP02 <br />' Cone Spiked ug1L 250 <br /> LCS Recovery ug/L 250 <br />' LCS % Recovery 100 <br /> i <br /> Percent Recovery Control Limits <br />' MS114SD 60140 <br /> LCS 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 same 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> .1 <br /> Richard Herling interference the LCS recovery is to be used to validate the batch <br /> Project Manager <br />