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Sparger Analytical Laboratory Division <br /> Mobile Laboratory Division <br /> T6chnobgyinc. Scientific Division <br /> With Automation in Mind <br /> 8020 Modified Laboratory Control Spike (LCS) & <br /> Laboratory Control Spike Duplicate (LCSD) BTEX Analysis Report <br /> Attention: Mr. John Cummings Date Sampled: Oct 27, 1993 <br /> John P. Cummings & Associates Date Received: Oct 28, 1993 <br /> P.O. Box 2847 <br /> Fremont, CA 94536-2847 <br /> Project ID: Project Name: Hess - Stockton <br /> Client ID: LCS/LCSD LAB ID: ST93-1 1-001 LCS <br /> ST93-1 1-001 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 30 ug/kg 103% 100% 3% <br /> Toluene 30 ppb ND 30 30 ug/kg 100% 100% 0% <br /> Ethylbenzene 30 ppb ND 30 30 ug/kg 100% 100% 0% <br /> Xylenes 30 ppb ND 30 30 ug/kg 100% 100% 0% <br /> Surrogate % Recovery of Trifluorotoluene = 103% LCS 87% LCSD <br /> ppb-parte per billion_usAa -micropreme per IdloWem <br /> PPm-parte Per million—up/p mlaoprama par Orem <br /> ND —Not Detected. Compound(s)may be prpent at aononttratione below the detection limit. <br /> Nov 1, 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 SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> icartrficatien No.16101 <br /> 3050 Fite Circle, Suite 112 + Sacramento, C clitcrnio'95827 9 (916) 362-8947 a FAX(946) 362-0947 <br />