Laserfiche WebLink
Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnot Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> X111 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 'Roy r Weston Client Project Ib SJCIISA <br /> 2300 Clayton Rd , Suite 1580 Matrix Water <br /> Concord, CA 94520-2148 <br /> Attention David Marks QC Sample Group 5071388-1396 Reported Aug 10, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE _ Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br />' LCS Batch#- LCS080895 LCS080895 LCS080895 LCS080895 <br /> Date Prepared 8/8/95 8/8/95 8/8/95 8/8/95 <br /> Date Analyzed. 8/8/95 8/8/95 8/8/95 8/8/95 <br /> Instrument I D #- GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br />' Recovery 98 98 98 98 <br /> Control Limits. 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch # 5071525 5071525 5071525 5071525 <br /> Date Prepared 8/8/95 8/8/95 8/8/95 8/8/95 <br />' Date Analyzed 8/8/95 8/8/95 8/8/95 8/8/95 <br /> Instrument I D #' GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br />' Matrix Spike <br /> %Recovery 95 94 96 94 <br /> Matrix Spike <br />' Duplicate% <br /> Recovery 94 94 96 94 <br /> Relative% <br />' Difference. 1 1 00 00 00 <br /> SEQUOIA ANALYTICAL Please Note <br /> /f The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used far <br /> �j validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advksory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager <br /> 5071388 ROY a4> <br /> 1 <br />