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spar er(t _ <br /> Analytical Laboratory Division <br /> Mobile LaboratoryDivision <br /> TeehnologyInc <br /> Scientific Dimsion <br /> With Automation in Mind <br /> 8020 Modified Laboratory Control Spike (LCS) & <br /> Laboratory Control Spike Duplicate (LCSD) BTEX Analysis Report <br /> Attention Mr Bob Marty Date Sampled Aug 31, 1993 <br /> Geological Audit Date Received Sep 1, 1993 <br /> 1803 W March Lane, Suite A <br /> Stockton, CA 95207 <br /> Project ID Project Name Mid-Cal II <br /> Client ID LCS/LCSD LAB ID ST93-09-009 LCS <br /> ST93-09-009 LCSD <br /> Matrix Soil Dilution <br /> Conc Sample LCS LCSD LCS % LCSD % % RPD <br /> Name Spike Added Result Result Result Units Recovery Recovery Recovery <br /> Benzene 30 ppb ND 31 32 ug/kg 103% 107% 3% <br /> Toluene 30 ppb ND 32 31 ug/kg 107% 103% 3% <br /> Ethylbenzene 30 ppb ND 32 31 ug/kg 107% 103% 3% <br /> Xylenes 30 ppb ND 32 31 ug/kg 107% 103% 3% <br /> Surrogate % Recovery of Trifluorotoluene = 107% LCS 100% LCSD <br /> ppb — parts per billion uglkg = micrograms per kiiogram <br /> ppm= parts per mrlhon = ugtg = micrograms per gram <br /> ND — Not Detected Compound fsi may be present at concentrations below the detection limit <br /> Sep 9, 1993 <br /> R L James, Principal Chemist Date Reported <br /> SPARGER TECHNOLOGY ANALYTICAL LABORATORY INC IS CERTIPED BY THE STATE OF CAUFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> CertificationNo 1614} <br /> I <br /> 3050 Fite Circle Suite 112 o Sacramento California 95827 9 (996) 362-8947 a FAX (996) 362-0947 <br />