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CA STLE ANALYTICAL LABORATORY Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 ' Phone: {209)384-2930 Certificate#2079 Fax: (209)384-1507 Advanced GeoEnvironmental,Inc. Client Project 10:Grewal's Market oMethod:EPA 5 03 0180 1 5M,8020 f Northern California Reference Number:3014 Instrument ID:Var-GC1 ' 4005 North Wilson Way Matrix:Water Prepared: 5-23-00 I Stockton,CA 95205 Analyst: Jim Phillips Analyzed: 5-23-00 Attn:Tim Cuellar Reported: 6-1-00 i QUALITY CONTROL DATA REPORT t , I i ' ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes Spike Concentration: 110 2.22 1.34 7.82 1.84 9.48 Units: ug/L ug/L uglL u L 9/ uglL ug1L LCS Batch#: VW-5230 VW-5230 VW-5230 VW-5230 VW-5230 VW-5230 LCS %Recovery: 138% 121% 95.2% 87.9% 92,7% Surrogate Recovery: 85.7% 9 ry: 96.1% 93.2% 93.2% 93.2% 93.2% 93.2% ' Control Limits: 70-130% 70-130% 70-130% 70-130% 70-130% 70-130% ' MS/MSD Batch#: VW-5230 VW-5230 VW-5230 VW-5230 VW-5230 VW-5230 Spike Concentration: 110 2.22 1 34 7.82 184 9.48 ' MS %Recovery: 114% 168% 91.2% 88.5% 92.3% 87 o Surrogate Recovery: 102% ° .0/o 98.8% 98.8/0 98.8% 98.6% 98.8% MSD%Recovery: 116% 168% 86.2% 92.3% 95.3% ° Surrogate Recovery: 105% ° 90.0/° ' 102% 102/0 102% 102% 102% Relative%Difference: 1.51% 0.452% 5.60% 4.11% 3.21% o 3.42/o Methanol Blank: ND ND ND ND ND ND Surrogate Recovery: 102% 102% 102% 102% 102% 102% ' The LCS(Laboratory Check Sample)is a control sample of known,interferent free matrix that is fortified with representative analytes and analyzed using the same reagents,preparation and analytical methods employed for the samples. The LCS%recovery is used for validation of sample batch results. Due to matrix effects,the QC limits and recoveries for MS/MSD's are advisory only and are not used to accept or ' reject batch results. ' ANALYST: APPROVED BY: Clare J. Cone Jam Phillips 6 ironmental Lab Director