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MATRIX ENVIRONMENTAL LAB ORA TORIES <br /> 3017 KILGORE ROAD#100 RANCHO CORDOVA, CA 95742 PHONE(916)635-3962 FAX(916)635-9331 <br /> ANALYSIS: BTEX SPIKE SUMMARY <br /> CLIENT: Upgradient Environmental <br /> CONTACT: V. Cherven Date Sampled: N/A <br /> COC No: 4656 Date Received: N/A <br /> Project No: Lodi Academy Date Extracted: 9/16/94 <br /> Sample ID: N/A Date of Analysis: 9/16/94 <br /> Lab ID: LCS/LCSD Matrix: SOIL <br /> CONC CONC PERCENT <br /> COMPOUND SPIKED MEASURED RECOVERY <br /> mg/kg LCS LCSD LCS LCSD RPD <br /> (ppm) <br /> BENZENE 0. 59 0.56 0. 60 95% 102% 7% <br /> TOLUENE 0. 90 0. 84 0.87 94% 97% 4% <br /> ETHYLBENZENE 0. 69 0. 63 0. 65 91% 94% 3% <br /> TOTAL XYLENES 1.76 1.70 1.77 96% 100% 4% <br /> LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> RPD= RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br /> e <br /> tom. <br />