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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 364-9253 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 9811.9600 FAX(510)989-9673 <br /> Analytical 119 Striker Avenue,Suite 8 Sacramento,CA 9.5834 (916) 921.9600 FAX(916)92 1-0 100 <br /> x <br /> . . .... d' i-- ........ <br /> x <br /> Del-TeCh Client <br /> 10624 Olive Ave. Matrix.- Water <br /> Oakdale, CA 95361 <br /> Attention: Don Light QC Sample Group 7060445-7060452 Reported: Jun 27, 1997.. <br /> %;.. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro' <br /> ethene Trichloroethene Benzene toluene benzene <br /> Method: EPA 8240 EPA 8240 EPA 8240 EPA 8240 EPA 8240 <br /> Analyst: K.Pocan K. Pocan K-Pocan K.Pocan K.Pooan <br /> Concentration <br /> Spiked: 50,ug/L 50 pg/L 50 pg/L 50 pg/L 50 wg/L <br /> LCS Bgitch#: LCS062697 LCS062697 LCS062697 LCS062697 LCS062697 <br /> Date Prepared: 06/26/97 06/26/97 06/26/97 06/26/97 06/26/97 <br /> Date Analyzed: 06/26/97 06/26/97 06/26/97 06/26/97 06/26/97 <br /> Instrument I.D.#: MS-F1 M8-F1 MS-Fl MS-Fl MS-Fl <br /> LCS % <br /> Recovery: 107 127 117 129 121 <br /> Control Limits: 65.135 70.130 70-130 70-130 70.130 <br /> ...............X. <br /> ......... . <br /> .......... <br /> 2 <br /> ............. <br /> ..................... <br /> x..1. <br /> MS/MSD <br /> Batch #: BS062697 BSD62697 88062697 BS062697 BS062697 <br /> Date Prepared: 06/26/97 06/26/97 06/26/97 06/26/97 06/26/97 <br /> Date Analyzed: 06/26/97 06/26/97 06/26/97 06/26/97 06/26/97 <br /> Instrument J.D.#: MS-Fl MS-Fl MS-Fl MS-Fl MS-Fl <br /> Matrix Spike <br /> % Recovery: 124 127 132 115 118 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 102 117 105 122 ill <br /> Relative % <br /> Difference: 19 82 23 5.9 6.1 <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 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 /> and are not used to accept or reject batch results, <br /> /inda C. Schneider <br /> Project <br /> roject Manager/Sacramento Laboratory <br /> 7060445.00D <9> <br />