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i <br /> •CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209} 384-2930 <br /> Certificate No 2079 <br /> Fax (209} 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Method TPH-Diesel <br /> of Northern California Reference Number 2007 Instrument ID HP-GC1 <br /> 4005 North Wilson Way Matrix Water Prepared 2-2-99 <br /> Stockton, CA 95205 Analyst Jim Phillips Analyzed 2-3-99 <br /> Attn Tim Cuellar Reported 2-12-99 <br />' QUALITY CONTROL DATA REPORT <br /> ANALYTE TPH-Diesel <br />' Spike Concentration 250 <br />' Units uglL <br /> LCS Batch # TPHDW-2029 <br /> ILCSA % Recovery 747% <br /> LCSB % Recovery 75 9% <br />'O'Control Limits 55-130 % <br /> Relative % Difference 1 66% <br />' MS/MSD Batch # TPHDW-2029 <br /> MS % Recovery See Note <br /> MSD % Recovery See Note <br />' Relative % Difference See Note <br />' Note Insufficient sample material to prepare MS/MSD samples LCS samples prepared in duplicate <br /> 1 fere fr UU ,,,u tr,x*6--, — fo-IF ed . rh r �.-"t—.anaivtaC and <br /> 111U L%,a %LdUU1dtUiy %.A1VL r, Jd MIJIe! IS a %,Vntrul a-IIV,n U* nnU yr i,, ,ntcr c�c,�i �' epre a <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 accept or <br />' reject batch results <br /> a <br /> •1 ANALYST APPROVED BY <br /> Clan JL P r rps <br /> Environmental Lab Drrector <br />