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Sequoia b80 Chesapeake Drive Redwood Citv CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Batcs Avenue Suite L Concord CA 94520 (5 E 0) 686 9600 f AX(5 10)686 9689 <br /> Analytical 319 Sinker Avenue Sun,8 Sacramento CA 95834 L9t6) 921 9600 FAX (916)921 0100 <br />• Brown & Caldwell <br /> Client Protect ID Arca 2133-95-5, Stockton <br /> 9616 Micron Ave Suite 600 Matrix Water <br /> Sacramento CA 95827 <br /> Attention Mindy Patterson QC Sample Group 501-0311 Reported Jan 26 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Cadmium Chromium Lead Nickel Zinc Oil &Grease Mercu <br /> Method EPA 200 7 EPA 200 7 EPA 200 7 EPA 200 7 EPA 200 7 EPA 413 1 EPA 7470 <br /> Analyst K Sarta K Barta K Barta K Barta K Barta L Settencourt D Ballard <br /> Concentration <br /> Spiked 0 50 mg1L 0 50 mg/L 0 50 mg/L 0 50 mg/L 0 50 mg/L 50 mg/L 0 0050 mg/L <br /> LCS Batch# LCS011395 LCS011395 LCS011395 LCS011395 LCS011395 LCS012095 LCS011795 <br /> Date Prepared- 1/13/95 1/13/95 1/13/95 1/13/95 1/13/95 1/20/95 1/17/95 <br /> Date Analyzed. 1/17/95 1/17/95 1/17/95 1/17/95 1/17/95 1/20/95 1/17/95 <br /> Instrument I D # P-40 P-40 P-40 P 40 P-40 SAL 4 SH-1000 <br /> LCS % <br /> Recovery: 96 103 99 104 101 98 93 <br /> Control Limits: BD-120 80.120 8D-120 80-120 80-120 75-125 80-120 <br /> MS/MSD <br /> Batch #: 5010323 5010323 5010323 5010323 5010323 BLK012095 5010311 <br /> Date Prepared: 1/13/95 1/13/95 1/13/95 1/13/95 1/13/95 1/20/95 1/17/95 <br /> Date Analyzed: 1/17/95 1/17/95 1/17/95 1/17/95 1/17/95 1/20/95 1/17/95 <br /> Instrument I.D.#: P40 PAA P-40 P-40 P-40 SAL 4 SH-1000 <br /> Matrix Spike <br /> % Recovery- 95 102 99 96 97 92 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 101 101 97 101 102 98 93 <br /> Relative% <br /> Difference: 61 099 20 51 5 0 63 22 <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 OC limits for MS/MSUs are advisory only <br /> c�-�-- 1-k fty,,. and are not used to accept or refect batch results <br /> Je ie Higgins 8' <br /> Project Manager <br /> 5010311 t3RS <8> <br />