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1 <br /> ' <br /> CASTLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209) 384 2930 <br /> Certificate #2079 Fax (209) 384-1507 <br /> Advanced GeoEnvtronmental, Inc Client Project ID Pacific Pride- EI Dorado Method EPA 503018015M,8020 <br /> of Northern California Reference Number 2701 Instrument ID Var-GC1 <br /> 4005 North Wilson Way Matrix Water Prepared 12-2899 <br /> Stockton, CA 95205 Analyst Jim Phillips Analyzed 12.2899 <br /> Attn Tim Cuellar Reported 1-4-00 <br /> t <br /> L-- <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes <br /> ' Spike Concentration 110 2 22 1 34 7 82 1 84 948 <br /> Units uglL ug1L uglL uglL ug/L. uglL <br /> ' LCS Batch # VW-D289 VW-D289 VW D289 VW 0289 VW-D289 VW D289 <br /> LCS % Recovery 78 7% 703% 664% 79 6% 87 7% 78 8% <br /> ' Surrogate Recovery 999% 929% 929% 92 9% 92 9% 92 9% <br /> Control Limits 70 130 % 70 130 % 70 130 % 70 130 % 70 130 % 70 130 % <br /> ' MS/MSD Batch # VW D289 VW D289 VW D289 VW-0289 VW D289 VW-D289 <br /> Spike Concentration 110 2 22 1 34 7 82 1 84 9 48 <br /> ' MS % Recovery 89 0% 81 6% 694% 95 2% 111% 101% <br /> Surrogate Recovery 109% 106% 106% 106% 106% 106% <br /> ' MSD % Recovery 900% 86 9% 686% 964% 112% 102% <br /> Surrogate Recovery 107% 108% 108% 108% 108% 108% <br /> Relative % Difference 0962% 6 03% 0876% 1 25% 0688% 0 270% <br /> Methanol Blank ND ND ND ND ND ND <br /> Surrogate Recovery 95 8% 904% 904% 904% 904% 904% <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 OC limas and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ym-ja�e__ <br /> ' ANALYST APPROVED BY <br /> Clan J Cone Ja es C Phillips <br /> ,oIrnvifonmental Lab Drrecror <br />