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Sequoia o80 ChcsaDcaKe Drive '�edwooa Cicv CA 94063 4151 364 9600 c 4 <br /> 1900 Bates dvenuc ]uacc L C,)ncora Ca 34520 FAX <br /> (4151 364 9233 <br /> Analytical a 101 686 9600 FaX{SSpI 68fi 9689 <br /> 319 Sv:kcrAvcrtue �ucse d �acramenso C4 95934 916) 921 96130 F4?( (916) 921 0100 <br /> Brown & Caldwell Client Project ID Arco 2133-94-5 StoC€cton <br /> 9616 Micron Avenue Suite 600 Matrix Water <br /> Sacramento CA 95827 <br /> Attention Mindv Wright CC Sample Group 407-0473 Reported Jul 26 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Arsenic Lead Silver Mercury Cyanide <br /> Method EPA 200 7 EPA 200 7 EPA 200 7 EPA 7471 EPA 335 2 <br /> Analyst D Ballard 0 Ballard D Ballard D Ballard J Helder <br /> Concentration <br /> Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 0 0050 mg/L 0 17 rng/L <br /> LCS Batch# LCS071494 LCS071494 LCS071494 LCS072294 N/A <br /> Date Prepared 7/14/94 7/14/94 7/14/94 7/22/94 N/A <br /> Date Analyzed 7/15/94 7/15/94 7/15/94 7/22/94 N/A <br /> Instrument 1 D # PE-40 PE-40 PE-40 SH-1000 N/A <br /> LCS <br /> Recovery- 87 87 88 117 N/A <br /> Control Limits 80-120 80.120 80.120 80-120 80-120 <br /> •• }+v.rFiGf9C+iA UiJCVJ..nf .. ..[1_-� <br /> MS/MSD <br /> Batch-# 4070481 4070481 4070481 4070430 9407391-1 <br /> Date Prepared:- 7/14/94 — 7/14/94 7/14/94 - 7/22/94 - 7/14/94 - - - - <br /> Date Analyzed- 7/15/94 7/15/94 7/15/94 7/22/94 7/14/94 <br /> Instrument I D # PE-Q PE-40 PE-40 SH-1000 N/A <br /> Matrix Spike <br /> % Recovery 80 83 84 114 101 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 90 86 84 123 93 <br /> Relative % <br /> Difference 12 36 00 75 8 2 <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that 1s 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 limits for MS/MSDs are advisory only <br /> GC, r C 1-- r and are not used to accept or reject batch results <br /> Craig C Cee <br /> Project Manager <br /> 4070473 BAS <9n <br />