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MATRIX ENVIRONMENTAL LABORATORIES <br /> ' ANALYSIS BTEX SPIKE SUMMARY <br /> ' CLIENT: Helmick & Lerner, Inc. <br /> CONTACT: D. Hakamoto Date Sampled: N/A <br /> COC No: 4173 Date Received: N/A <br /> ' Project No: City of Tracy Fire Dept.2 Date Extracted: 10/13/93 <br /> Sample ID: N/A Date of Analysis: 10/13/93 <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 1. 0. 96 0.96 96% 96% 0% <br /> TOLUENE 1. 0.91 0.91 91% 91% 0% <br /> IOETHYL BENZENE 1. 0. 86 0.85 86% 85% 1% <br /> TOTAL XYLENES 3 . 2 . 54 2 .52 85% 84% 1% <br /> SURROGATE RECOVERY <br /> I 93% 93% ACCEPTABLE RANGE <br /> 70% TO 130% <br /> ' LCS= LABORATORY CONTROL SPIKE <br /> LCSD= LABORATORY CONTROL SPIKE DUPLICATE <br /> ' RPD- RELATIVE PERCENT DIFFERENCE <br /> CONC= CONCENTRATION <br /> 3017 KILGORE ROAD #110 0 RANCHO CORDOVA CA 95742 PHONE (916) 635-3962 • FAX (916) 635-9331 <br />