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' ST <br /> CA LE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Fax (209) 384-1507 <br /> i <br />' Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Method EPA 5030/8015M,8020 <br /> of Northern California Reference Number 1151 Instrument kD Var-GC1 <br /> 1803 West March Lane, Suite A Matrix Soil Prepared 6-21-97 <br /> Stockton, CA 95207 Analyst Clan Cone Analyzed 6-21 97 <br />' Attn Tim Cuellar Reported 6-24-97 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Xylenes <br /> 1 Spike Concentration 200 200 200 200 200 400 <br />' Units mglkg uglkg ug/kg ug/kg ug/kg ug/kg <br /> LCS Batch # VG-6217 VB-6217 VB 6217 VB 6217 VB 6217 VB-6217 <br />' LCS % Recovery 103% 969% 95 7% 990% 97 1% 988% <br /> Surrogate Recovery 101% 118% 118% 118% 118% 1180/0 <br /> lie <br /> Control Limits 70-130 % 70-130 % 70-130 % 70-130 % 70-130 % 70-130 % <br /> MS/MSD Batch # VG-6217 VB-6217 VB-6217 VB 6217 VB-6217 VB-6217 <br /> IVIS % Recovery 598% 548% 61 5% 68 3% 679% 71 3% <br /> Surrogate Recovery 88 1% 797% 79 7% 79 7% 797% 79 7% <br /> I MSD % Recovery 59 5% 660% 699% 646% 76 7% 742% <br /> Surrogate Recovery 820% 91 2% 91 2% 91 2% 91 2% 912% <br /> Relative % Difference 0444% 18 5% 11 0% 4 01% 11 3% 347% <br /> Methanol Blank ND ND ND ND ND ND <br /> Surrogate Recovery 110% 110% 110% 110% 110% 110% <br /> Please Note <br /> The LCS (Laboratory Check Sample) is a control sample of known, interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents, preparation and analytical methods employed for the samples The LCS % recovery is used for validation <br /> 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 accent or <br /> reject batch results <br /> r <br /> ANALYST � attO-(�Z APPROVED BY <br /> 'e - Z/"7/--11 <br /> Clary J one J s r Irps <br /> Environmental Gab Director <br /> f <br /> I <br />