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MATRIX ENVIRONMENTAL <br />ANALYSIS: <br />BTEX SPIKE SUMMARY <br />PERCENT <br />RECOVERY <br />LCS <br />LCSD <br />CLIENT: <br />Herbst Engineering <br />1. <br />1.14 <br />CONTACT: <br />E. Herbst <br />Date Sampled: <br />N/A <br />COC No: <br />3840 <br />Date Received: <br />N/A <br />Project No: <br />LODI MEMORIAL HOSPITAL <br />Date Extracted: <br />3/16/93 <br />Sample ID: <br />N/A <br />Date of Analysis: <br />3/23/93 <br />Lab ID: <br />LCS/LCSD <br />Matrix: <br />SOIL <br />COMPOUND <br />CONC <br />SPIKED <br />CONC <br />MEASURED <br />LCS LCSD <br />PERCENT <br />RECOVERY <br />LCS <br />LCSD <br />RPD - <br />BENZENE <br />1. <br />1.14 <br />1.33 <br />114% <br />133% <br />15% <br />TOLUENE <br />1. <br />1.03 <br />1.18 <br />103% <br />118% <br />14% <br />ETHYL BENZENE <br />1. <br />0.98 <br />1.39 <br />98% <br />139% <br />34% <br />TOTAL XYLENES <br />3. <br />3.11 <br />3.60 <br />104% <br />120% <br />15% <br />LCS= <br />LABORATORY CONTROL <br />SPIKE <br />LCSD= <br />LABORATORY CONTROL <br />SPIKE DUPLICATE <br />RPD= <br />RELATIVE PERCENT DIFFERENCE <br />CONC= <br />CONCENTRATION <br />17 KILGORE ROAD #1 CORDOVA, CA 9574 (91 -3962 - FAX(916)635-9331 <br />