Laserfiche WebLink
' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Woget Lane Walnut Creek CA 94598 (51O)988 9600 FAX(510)988-9673 <br /> 819 Striker Avenue Susie 8 Sacramento CA 95834 (916)9Z1 9600 FAX(916)921 0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 FAX(707)792 0342 <br />' EA Engineering Client Project ID Exxon 7-3942, 5153942 1300 <br /> 3468 Mt Diablo Blvd, Ste 8100 <br /> Lafayette CA 94549 <br /> Attention Christa Marting QC Sample Group 9805E41 03-07,09,11 Reported Jun 10 1998 <br /> QUALITY CONTROL DATA REPORT <br />' Matrix Liquid <br /> Method EPA 8020 <br /> Analyst N Herrera <br />' ANALYTE Benzene Toluene Ethylbenzene Xylenes <br /> QC Batch # GC060298BTEX17A <br />' Sample No GW9805E04-6 <br /> Date Prepared 612/98 612/98 612198 6/2/98 <br />' Date Analyzed 612198 612198 612198 612198 <br /> Instrument l D # GCHP 17 GCHP-17 GCHP-17 GCHP-17 <br /> Sample Conc , ug/L N D N D N D N D <br />' Conc Spiked ug/L 10 10 10 30 <br /> Matrix Spike ug/L 8 3 8 2 8 5 30 <br /> % Recovery 83 82 85 100 <br /> Matrix <br /> Spike Duplicate, ug/L 8 6 8 3 8 0 28 <br /> % Recovery 86 83 80 93 <br /> Relative % Difference 3 5 1 2 6 1 7 3 <br /> i <br />' RFD Control Limits 0-25 0-25 0-25 0-25 <br /> LCS Batch# GWIILK0602911ABS <br />' Date Prepared 6/2/98 612198 612198 612198 <br /> Date Analyzed 612198 612198 612198 612198 <br /> Instrument I D # GCHP 17 GCHP 17 GCHP-17 GCHP-17 <br />' Conc Spiked ug/L. 10 10 10 30 <br /> LCS Recovery, uglL 118 8 6 9 7 27 <br /> LCS % Recovery 88 86 97 90 <br /> Percent Recovery Control Limits <br />' MS/MSD 60140 60140 60140 60140 <br /> LCS 70130 70130 70130 70130 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br />' <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 11 <br /> the recovery of analytes from the matrix spoke does not fail within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Ri hard Herling <br /> Project Manager <br />