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CERTIFICATE OF ANALYSIS <br /> Ana/ytica/ Laboratory <br /> Friday, October 15, 1999 <br /> TO: William Little <br /> Advanced GeoEnvironmental, <br /> 4005 N.Wilson Way <br /> Stockton, Ca. 95205 <br /> Sample Information <br /> Sample ID: PE6167-14 Sample Type: Composite <br /> Sample Description: COMPOSITE SP3 AND SP4 Project Nante: Quick&Save 7200 S.Eldo <br /> DateJTinte Sampled: 10/13/99 12:35:00 PM Sample A9atri.v: Soil <br /> ANALYTICAL RI SULT QA/QCREPORT <br /> %estParae[er Method DLR Unit Result �A►D�� LCS Spike MS Spike <br /> ne <br /> Analyzed Blank Colic. LCS% Cone. MS% MSD RSD <br /> TPH-Gasoline EPA 8015M/DHS 1 mg/Kg ND 13-Oct-99 ND 500 112.0% 500 96.0% 98.0% 0.5% <br /> a <br /> Methyl t-Butyl Ether(MtBE) EPA8260 5 ugtKg ND 13-Oct-99 ND 70 114.3% 70 114.3% 125.7% 2.4% <br /> Diisopropyl ether(DIPE) EPA8260 5 ugtKg ND " 13-Oct-99 ND 70 107.1% 70 117.1% 125.7% 1.8% <br /> Ethyl-t-butyl ether(ETBE) EPA8260 5 ugtKg ND 13-Oct-99 ND 70 102.9% 70 107.1% 110.0% 0.7% <br /> Tertamyl methyl ether(TAME) EPA8260 5 ug/Kg ND 13-Oct-99 ND 70 101-4°k 70 110.0% 111.4% 0.3% <br /> t-Butanol(TBA) EPA8260 5 ug/Kg ND 13-Oct-99 ND 70 102.9% 70 92.9% 100.0% 1.9% <br /> Benzene EPA 8260 5 ug/Kg ND 13-Oct-99 ND 20 110.0% 20 110.0% 125.0% 3.2% <br /> Toluene EPA 8260 5 ug-/Kg ND 13 Ocl 99 ND 20 90.0% 20 110.0% 135.0% 5.1% <br /> Ethyl Benzene EPA 8260 5 ug/Kg ND 13-Oct-99 ND a 20 100.0% 20 125.0% 140.0% 2.8% <br /> Xylene,Total EPA 8260 5 ug/Kg ND 13-Oct-99 ND� 40 105.0% 40 137.5% 135.0% 0.5% <br /> mg/L=milligrams per Liter=ppm DLR-Detection Lindi for the Purpose of Reporting. RSD represent relative percent different(RPD)between duplicates spike ofsamples <br /> ug/L=micrograms per Liter=ppb Exceptional sample matrices or interfereneces may result in or Duplicate of Sample <br /> C=Composite G=Grab higher detection limits MS/MSD-measure of the percent recovery efficiencies within the matrix <br /> LCS-measure of the percent recovery of the Laboratory Control Spike(LCS) <br /> RESPECTFULLY,S,UB ITTED, <br /> Jonathan Hao V.Le,Laboratory Director <br /> IiPA-Environmental Protection Agency dlerhorL Page I of I <br /> SAI-Standard MedadforExamination� 5t`l n i (1 1a�i/dl�t. Suite A Stockton, CA 95204 Tel.: (209) 462-0892 Fax: (209) 462-7935 <br />