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' CASTLE ANALYTICAL LABORATORY <br /> ' Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmentaf Inc Client Project ID Rainwater Car Wash Sampled 06-23-04 <br /> ' of Northern California Reference Number 7093 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 07-02-04 <br /> Stockton,CA 95215 Sample PreplAnaiysis Method EPA 5030/8260 Analyzed 07-02-04 <br /> Attn Tim Cuellar Lab Numbers 7093-1W 2W 3W 4W 5W Reported 07-07-04 <br /> GASOLINE ADDITIVES BY EPA METHOD 8260 GCIMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-1 MW-2 Ml MW-5 MW 7A <br /> ' 062304 062304 _ 062304 062304 062304 _ <br /> (uglL) (pq/L),_-.- (pg1L) _(h9/L) (Ng1L) (pq/Q <br /> FUEL OXYGENATES <br /> Methyl tert Butyl Ether(MTBE) 0 50 3200 23000 5000 NO 17 <br /> ' D,-isopropyl Ether (DIPE) 0 50 ND ND ND NO NO <br /> Ethyl tert-Butyl Ether (ETBE) 050 ND ND NO ND NO <br /> ' tert-Amyl Methyl Ether(TAME) 0 50 81 240 70 NO 055 <br /> tert-Butanol(TBA) 20 ND ND ND ND ND <br /> 1 VOLATILE HALOCARBONS <br /> 1 2-Dichloroethane (1 2-DCA) 0 50 ND ND NO NO ND <br /> tEthylene Dibromide (EDB) 050 ND ND ND ND ND <br /> SOLVENTS <br /> ' Trichloroethene(TCE) 050 NO NO NO 1 0 13 <br /> Tetrachioroethene (PCE) 050 NO 150 120 7 9 14 <br /> ' Report Limit Multiplication Factor 20` 100' 20" 1 1 <br /> Report Limit Multiplication Factor for MTBE 200 2000 500 <br /> Report lunit raised due to matrix interference <br /> ' Surrogate Recoveries <br /> 1 2-Dichloroethane-d4 967% 920% 952% 936% 902% <br /> Toluene-d8 101% 979% 950% 988% 942% <br /> ' Instrument ID HP 5972 MS <br /> Analytes reported as ND were not detected or befow the Practical Quantitation Limit <br /> Practical Quantitation Limit= Reporting Limit x Report Limit Multiplication Factor <br /> ' (pg/L)= micrograms per liter or parts illion (ppb) <br /> ANALYST .f� APPROVED BY <br /> ' Clair one aures C Phillips <br /> Laboratory Arrector <br />