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Sequoia �, 680 Chesapeake Drive Redwood City,CA' 7+063 (415) 964.9600 FAX(415) 364.9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (510) 988.9600 FAX(510)988.9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921.0100 <br /> 44W <br /> I <br /> �• / Y'7 f' •t% ✓ k .. � \ {/J% IFjr!`i!+r!i',�// i •",@:�ffi' \ \\`'�`�`+`?`�i'iie9Fk;S;:;;;;i:,••,•,':ii'?'.`:Rk'.4;::%" r':tES'�'/ /J <br /> neo tra e�les�ncf . ' e� � r <br /> I � g Ce t �roJect�C5: Uf'J{76AC, Bosco <br /> 3164 Gold Camp Dr., Suite 240 Matrix: Soil <br /> Rancho Cordova, CA 95670 <br /> Attention: Greg Gurss QC Sample Group 705-0337 Reported: May 21, 1997;;' <br /> :'.•l.r.}Y.+.iX.f..:.:.::./4'f.:r••;:..\♦ .: \\ ,•\,\\,:4„:?.>.;.Y.:•`.Y.l.i•.'r.',:�i::?;itir'r: :,u,:•rt:•ri:rtt•iiiY:•%//'%f`: <br /> ::•: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichloro- Chloro- <br /> ethane 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.Pocan <br /> Concentration <br /> Spiked: 2500 ug/kg 2500 ug/kg 2500 ug/kg 2500 ug/kg 2500 ug/kg <br /> LCS Batch#: LCS052097 LC8052097 LCS052097 LCS052097 LCS052097 <br /> Date Prepared: 05/20/97 05/20/97 05/20/97 05/20/97 05/20/97 <br /> Date Analyzed: 05/20/97 05/20/97 05/20/97 05/20/97 05/20/97 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> LCS % <br /> Recovery: 126 112 117 114 115 <br /> 41 <br /> Control Limits: 65-135 70-130 70-130 70-130 70-130 <br /> �:�.:� ..,........t......... <br /> \.... <br /> .............:....... <br /> .......... <br /> MS/MSD <br /> Batch #: BS052097 BS052097 BS052097 BS052097 BS052097 <br /> Date Prepared: 05/20/97 05/20/97 05/20/97 05/20/97 05/20/97 <br /> Date Analyzed: 05/20/97 05/20/97 05/20/97 05/20/97 05/20/97 <br /> Instrument I.D.#: MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> Matrix Spike <br /> Recovery: 126 112 117 114 115 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 121 110 112 111 124 <br /> Relative % <br /> Difference: 4.1 1.8 4.4 2.7 7.5 <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 /> Edana M. Fruciano <br /> Project Manager/Sacramento Laboratory <br /> 7050337.GSI <13> <br />