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Sequoia 680 Chesapeake Drive 3tedwood Gty,CA 94063 (4 15) 364 9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue Suite L Concord.CA 94520 (310) 686 9600 FAX(5 10)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacamemo CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> `G ound Aogy` �Clie F'oject D�Chevronn #9�4(M, tract', C:i4 <br /> 1401 Halyard Drive, Suite 140 Matrix Soil <br /> West Sacramento, CA 95691 <br /> Attention Jason Fedota OC Sample Group 5050264, 66,fig, 71, 74-75, 78-79 <br /> Reported May 19, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> s <br /> Cadmium Chromium Lead Nickel Znc <br /> Method: EPA 6010 EPA 6010 EPA 6010 EPA 6070 EPA 6010 <br /> Analyst: K saga K Barta K Barta K Barra K Barta <br /> Concentration <br /> Spiked: 50 mg/kg 50 mg/kg 50 mg/kg 5o mg/kg 50 mg/kg <br /> LCS Batch# LCSOS0895 LCS050895 LCS050895 LCS050895 LCS050895 <br /> Date Prepared: 5/8/95 5/8/95 5/8/95 5/8/95 5/8/95 <br /> Date Analyzed: 5/10/95 5/10/95 5/10/95 5/10/95 5/10/95 <br /> Instrument I.D.#: P-40 P40 P-40 P-40 P-40 <br /> LCS % <br /> Recovery: a8 92 90 94 93 <br /> . Control Limits: 80-120 80.120 80-120 8o-120 80-120 <br /> }K.K.�n+=.. „ t+ac.h.ry .,..ro,... 4 o•�vrtt . .. ,.. ,. n..w41.,...,G 4ti�,`i,�c,�^^r <br /> MS/MSD <br /> Batch#: 5050361 5050361 5050361 5050361 5050381 <br /> Date Prepared. 5/6/95 5/8/95 5/8/95 5/8/95 5/8/95 <br /> Date Analyzed- 5/10/95 5/10/95 5/10/95 5/10/95 5/10/95 <br /> Instrument I.D.# P-40 P-40 P-40 P-40 P-40 <br /> Matnx Spike <br /> % Recovery 88 91 90 74 a7 <br /> Matnx Spike <br /> Duplicate % <br /> Recovery 86 84 85 78 84 <br /> Relative % <br /> Difference 23 80 57 53 35 <br /> Please Note <br /> The LCS is a control sample of known interferent tree 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 OC limns for MS/MSD s are advisory only <br /> ` 1 and are not used to accept or reject batch results <br /> Unda C Schneider <br /> Project Manager <br /> 5050264 GRW c 14> <br /> -Oa <br />