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CHEMTECH ANALYTICAL LABORATORIES <br /> ANALYSIS REPORT <br /> CLIENT: Western Geo CONTACT: G. Converse <br /> Date Samples Received: 03-29-91 P.O. #: <br /> Date of Analysis: 04--02-91 CT ID: 1803 <br /> Lab 10: LCS. LCSD <br /> Matrix: Water <br /> y � <br /> STEX LABORATORY CONTROL SPIKE SUMMARY <br /> RUN DATE: 04-02-91 <br /> CONC UNITS: ug/L (ppb) <br /> { SAMPLE SPIKED: LCS. LCSD-( 1803) <br /> COMPOUND CONC CONC ----PERCENT------ ----------- <br /> SPIKED MEASURED RECOVERY RPD <br /> ------ _____ <br /> LCS LCSD LCS LCSD ----- <br /> ------------ -- ------ <br /> BENZENE 2S 23 23 ------92%--92%-----0 ---------- <br /> 4 <br /> TOLUENE 25 24 23 96% 92% 4% <br /> ETHYLBEN7.ENE 25 26 26 104% 104% 0% <br /> O/M/P-XYLENES 75 77 .77 103% 103% 0% <br /> i <br /> i <br /> LCS Laboratory Control Spike <br /> LCSD = Laboratory Control Spike Duplicate <br /> RPD = Relative Percent Difference <br /> CONC = Concentration <br /> i - <br /> i <br /> F <br /> 3017 KICGORE ROAD#110 • AANCHO CORDOVA,CA 95742 PHONE (916) 635.3962 n .FAX(916)635.9331 <br />