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' A <br /> • C STLE 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 GeoEnvironmental, Inc Client Project ID Cal Fuel's Method EPA 5030/8015M 8020 <br /> of Northern California Reference Number 1405 Instrument ID Var GC1 <br /> 1803 West March Lane, Suite A Matrix Water Prepared 1-1498 <br /> Stockton, CA 95207 Analyst Jim Phillips Analyzed 1-1498 <br /> Attn Tim Cuellar Reported 1-2098 <br />' QUALITY CONTROL DATA REPORT <br />' ANALYTE Gasoline MTBE Benzene Toluene Ethyl Benzene Total Xylenes <br />' Spike Concentration 100 1 00 1 00 1 00 1 00 2 00 <br /> units uglL uglL ug/L uglL uglL ug1L <br /> LCS Batch # VG-1148W VB-1148W VB 1148W VB-1148W VB-1148W VB 1148W <br /> LCS % Recovery 93 7% 106% 984% 95 9% 93 5% 942% <br /> Surrogate Recovery 993% 96 6% 966% 96 6% 966% 96 6% <br />' Control Limits 70 130 % 70 130 % 70 130 % 70-130 % 70-130 % 70-130 % <br /> MS/MSD Batch # VG-1148W VB 1148W V8 1148W VB 1148W VB-1148W VB-1148W <br /> MS % Recovery 974% 115% 945% 98 2% 94 7% 97 7% <br /> I Surrogate Recovery 110% 105% 105% 105% 105% 105% <br /> MSD % Recovery 96 1% 166% 86 0% 940% 950% 95 9% <br /> Surrogate Recovery 104% 104% 104% 104% 104% 104% <br /> Relative % Difference 1 32% 36 1% 8 61% 3 16% 0284% 1 71% <br /> Methanol Blank ND ND ND ND ND ND <br /> Surrogate Recovery 103% 103% 103% 103% 103% 103% <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 limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> I ANALYST G'L APPROVED B <br /> Clan J Cone J C helhps <br /> Environmental Lab Duecror <br />