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' CASTLE ANALYTICAL LABORATORY F <br /> • Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)3B4-1507 <br /> Biophysics Environmental Assessment Client Project 1D Frontier Trucking-Tracy Sampled 06-20-05 <br />' 3577 W Philadelphia Ave Reference Number 8258 Received 06-21-05 <br /> Chino CA 91710 Sample Description Water Extracted 06-24-05 <br /> Attn Dave Blakely Sample Prep/Analysis Method EPA 5030/8260 Analyzed 06-24-05 <br /> Lab Numbers 8258-6W,7W,8W,9W Reported 06-30-05 <br /> 1 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GUMS <br /> 1 <br /> ANALYTE REPORTING SAMPLE 1D SAMPLE ID SAMPLE ID SAMPLE ID <br />' LIMIT MW-15 MW-16 MW-17 MW-18 <br /> (N /L) (pg/L) (pg/L) (Ng/L) (Ng/L) <br /> FUEL OXYGENATES <br />' Methyl tert-Butyl Ether(MTBE) 050 ND ND 330 12 <br /> Di-isopropyl Ether (DIPS) 050 s ND ND ND ND v <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND ND ND ND <br /> tert-Amyl Methyl Ether(TAME) 050 _ ND ND ND ND <br />' tert-Butanol(TBA) 20 ND ND ND ND <br />' Report Limit Multiplication Factor 1 1 1 1 <br /> Report Limit Multiplication Factor for MTBE 10 <br /> 1 <br />' Surrogate Recoveries - <br /> 1,2-Dichloroethane-d4 106% 105% 106% 112% <br />' Toluene-d8 984% 961% 107% 101% <br /> Instrument ID Varian 2100T&HIP 5972 MS <br /> Anatytes reported as ND were not detected or below the Practical Quantitation Limit <br />' Practical Quantitation Limit= Reporting Limit x Report Limit Multiplication Factor <br /> (pg/L)= micrograms p liter or parts p billion(ppb) <br /> APPROVED BY APPROVED BY 01,1t—,eW <br /> Clan Cane Jam s C'Phillips <br /> Laboratory Manager L oratory Director <br />