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Sequoia 680 Chcsapcake Dnve Redwood City CA 94063 (415) 364-9600 FAX(415)364.9233 <br /> 4a 104 N Wigei Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988 9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Grown & Caldwell Client Project ID Arco 2133-95-5, Stockton <br /> 9616 Micron Ave . Suite 600 Matrix Air/Water <br /> Sacramento, CA 95827 <br /> Attention Steve Misner CC Sample Group 5100967-969 Reported Nov 7, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes TRPH Lead <br /> Method EPA 8020 EPA 8020 EPA 8024 EPA 8020 EPA 418 1 EPA 6010 <br /> Analyst: C Lee C Lee C Lee C Lee P Kent SO/CM <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L 4 0 mg/L 1 0 mg/L <br /> LCS Batch#: LCS102795 LCS102795 LCS102795 LCS102795 LCS110195 LCS103095 <br /> Date Prepared: 10/27/95 10/27/95 10/27/95 10/27/95 11/1/95 10/30/95 <br /> Date Analyzed: 10/27/95 10/27/95 10/27/95 10/27/95 11/1/95 11/2/95 <br /> Instrument I.D.#* GCHP-2 GCHP-2 GCHP-2 GCHP-2 1R-1 MTJA2 <br /> LCS % <br /> Recovery: 91 95 92 91 81 89 <br /> Control Limits: 75-125 75-125 75-125 75-125 80.120 75-125 <br /> „...,..a.,. M �t+,�awMrr xN.a s;�o,..,, ^� r „yLro r, n� .'?s` ,^.^�h.,. S`a c i <,,.,r.wn,... , ;�"` .. 4x��v��tro., .dc��kr�'-^a yM,"+-• �v <br /> y <br /> MS/MSD <br /> Batch#: BS102795 BS102795 85102795 GS102795 sS110195 5101092 <br /> Date Prepared: 10/27/95 10/27/95 10/27/95 10/27/95 11/1/95 10/30/95 <br /> Date Analyzed: 10/27/95 10/27/95 10/27/95 10/27/95 11/1/95 11/2/95 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 IR-1 MTJA-2 <br /> Matrix Spike <br /> % Recovery: 94 118 114 125 81 89 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 96 104 96 96 8o 86 <br /> Relative% <br /> Difference: 21 13 17 26 12 34 <br /> SEQUOIA ANALYTICAL Please Mote <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 /> N�vl> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD s are advisory only <br /> Janet an and are not used to accept or reject batch results <br /> Project anager <br /> 5100967 8RS [6> <br />