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Hil <br /> Spargerf) Analytical Laboratory Division Mobile Laboratory Dnnslon <br /> iTechnologyInc Scientfic Division <br /> With Autornotion 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 Oct 6, 1993 <br /> Geological Audit Date Received Oct 8, 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 ST93-10-015 LCS <br /> ST93-10-015 LCSD <br /> Matrix Soil Dilution <br /> Cone Sample LCS LCSD LCS % LCSD % % RPD <br /> Name Spike Added Result Result Result Units Recovery Recovery Recovery <br /> Benzene 30 ppb ND 29 30 ug/kg 97% 100% 3% <br /> Toluene 30 ppb ND 29 30 ug/kg 97% 100% 3% <br /> Ethylbenzene 30 ppb ND 29 30 ug/kg 97% 100% 3% <br /> Xylenes 30 ppb ND 29 30 ug/kg 97% 100% 3% <br /> Surrogate % Recovery of Trifluorotoluene — 97% LCS 97% LCSD <br /> ppb — parts per billion a ug/kg = micrograms per kilogram <br /> ppm= parts per million = uglg = micrograms per gram <br /> ND z Not Detected Compound(s)may be present at concentraaona below the detection limit <br /> Oct 15, 1993 <br /> R L James Principal Chemist Date Reported <br /> SPARGER TECHNOLOGY ANALYTICAL LABORATORY INC IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH Si AS A HAZARDOUS WASTE TESTING LABORATORY <br /> ICerbflcatien No 16141 <br /> 3050 Fite Circle Suite 112 o Sacramento Cahfornio 95827 0 (996) 362-8947 o FAX (996) 362-0947 <br />