Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 1%6 <br /> � Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Roy p Weston Client Project ID San Joaquin County MVCD <br /> One Concord Center, Suite 150 Matrix Water <br /> 2300 Clayton Road <br /> Concord, CA 94520-2148 OC Sample Group 5060985-988 Reported Jul 5, 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- 10pg/L 10ug/L 10Ng/L 30pg/L <br /> LCS Batch# LCS062695 LCS062695 LCS062695 LCS062695 <br /> Date Prepared 6/26/95 6/26/95 6/26/95 6/26/95 <br /> Date Analyzed 6/26/95 6/26/95 6/26/95 6/26/95 <br /> Instrument I.D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS <br /> Recovery- 90 92 92 92 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch# 5061489 5061489 5061489 5061489 <br /> Date Prepared 6/26/95 6/25/95 6/26/95 6/26/95 <br /> Date Analyzed 6/26/95 6/26/95 6/26/95 6/26/95 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> % Recovery 87 88 90 88 <br /> I Matrix Spike <br /> Duplicate% <br /> Recovery 88 87 91 90 <br /> Relative% <br /> Difference 11 11 11 22 <br /> SEQUOIA ANALYTICAL Please Note <br /> 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 for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSOs are advisory only <br /> Linda C Schneider I and are not used to accept or reject batch results <br /> Project Manager <br />' 5060985 ROY <4> <br />