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CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br /> Certificate#1-2480 Fax (209)384-1507 <br /> FFAdvanced GeoEnvironmental Inc Client Project Ill Cal Fuels Sampled 12-19-01 <br />' Northern California Reference Number 4310 Received 12-20-01 <br /> 837 Shaw Road Sampie Description Water Extracted 12-31-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8250 Analyzed 12-31-01 <br /> Attn Tim Cuellar Lab Numbers 4310-11W 12W, 13W 14W 15W Reported 1-4-02 <br />' GASOLINE ADDITIVES BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE #D SAMPLE ID SAMPLE ID <br />' LIMIT MW 11 MW 12 MW 13 AW 1A AW 1B <br /> 121901 421901 121901 121901 121901 <br /> - — -- . (ug/L) -— (ug/t-) (ug/L) (ug/L) (ug/L) (ug/L) <br />' FUEL OXYGENATE <br /> Methyl tert-Butyl EFher(MTBE) 050 0 70 ND NO NO NO <br />' Dr-isopropyl Ether (DIPS) 0 50 NO ND NO NO NO <br /> Ethyl Cert-Butyl Ether (ETRE) 0 50 ND NO NO NO NO <br /> tert-Amyl Methyl Ether(TAME) 050 NO NO NO NO NO <br /> tert-Butanol (TBA) 20 NO NO ND NO NO <br /> VOLATILE HALOCARSONS <br /> I <br /> 1,2-Dichloroethane (1 2-OCA) 050 NO ND NO NO NO <br />' Ethylene Dibrcmrde (EDB) 050 ND NO ND NO NO <br />' Report Limn Multiplication Factor 1 1 1 20* 10x <br /> 1 <br /> *increased reporting limit due to matrix interferences <br /> (Surrogate Recoveries <br /> 1 2-Dichloroefhane-d4 104% 107% 929% 924% 91 3% <br /> Toluene-o$ 108% 105% 106% 104% 112% <br /> Instrument ID HP 5972MS <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit W Reporting Limit x Report Limit Multiplication Factor <br /> (jag/L)= micrograms per liter or parts oer billion (ppb) 7z <br /> i <br /> ANALYST APPROVED BY <br /> Clan J Cone Jame C rllips <br /> La ratory Director <br />