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MATRIX ENVIRONMENTAL LABORATORIES <br /> ANALYSIS- METALS LABORATORY CONTROL SPIKE SUMMARY <br /> CLIENT: Western GEO <br /> CONTACT: G. Converse Date Sampled: N/A <br /> COC No• 3649 Date Received: N/A <br /> Project No: R-603 Date Extracted: 12/7/92 <br /> Sample ID: N/A Date of Analysis: 12/7/92 <br /> Lab ID: LCS/LCSD Matrix: WATER <br /> CONC CONC PERCENT <br /> COMPOUND SPIKED MEASURED RECOVERY RPD <br /> (PPM) LCS LCSD LCS LCSD <br /> CADMIUM 3 . 6 3 .41 3 . 36 95% 93% 1% <br /> CHROMIUM 3 . 6 3 . 31 3 . 39 92% 943% 2% <br /> COPPER 3 . 6 3 . 28 3 . 34 91% 93% 2% <br /> LEAD 3 . 6 3 . 34 3 . 39 93% 94% 1% <br /> NICKEL 3 . 6 3 . 38 3 . 41 94% 95% 1% <br /> ZINC 1. 8 1. 44 1. 45 80% 81% 1% <br /> LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br /> 3017 KILGORE ROAD# 100 a RANCHO CORDOVA, CA 95742 PHONE (916) 635-3962 • FAX (916) 635-9331 <br />