Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 3649600 FAX (415) 364-9233 <br /> 404 N. Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(5 10)9889673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 9219600 FAX (916)921 0100 <br /> t <br /> Pacific Environmental Group Client Project ID: 920-078.1Ajhevron 9 0557, 139 S. Center St. <br /> 11315 Sunrise Gold Circle, Ste. M Matrix: Water <br /> Rancho Cordova, CA 95742 <br /> Attention: Roger Hoffmore OC Sample Group 7110051-52 Reported: Nov 11, 1997:<` <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: S.Phillips S.Phillips S.Phillips S.Phillips <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L ! <br /> LCS Batch#: LCS111197 LCS111197 LCS111197 LCS111197 <br /> Date Prepared: 11/11/97 11/11/97 11/11/97 11/11/97 <br /> Date Analyzed: 11/11/97 11/11/97 11/11/97 11/11/97 <br /> Instrument I.D.#: GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> �-~ LCs % <br /> Recovery: 102 95 93 92 <br /> Control Limits: 70-130 70-130 70-130 70-130 <br /> I <br /> .. . .. .. .. ....... <br /> MS/MSD <br /> Batch#: 7110053 7110053 7110053 7110053 <br /> Date Prepared: 11/11/97 11/11/97 11/11/97 11/11/97 <br /> Date Analyzed: 11/11/97 11/11/97 11/11/97 11/11/97 <br /> Instrument I.D.#: GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Matrix Spike <br /> Recovery: 102 94 92 93 <br /> Matrix Spike <br /> Duplicate <br /> Recovery: 96 92 90 91 <br /> I <br /> Relative % I <br /> Difference: 6.1 2.2 2.2 2.2 <br /> SEQUOIA ANALYTICAL Please Dote: <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 QC limits for MS/MSD's are advisory only <br /> Linda C. Schneider and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labora ory <br /> 7110051-PES <4> <br />