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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br /> ' Certificate#2079 Fax (209)384-9507 <br /> Advanced GeoE nviron mental Inc Client Project ID Rainwater Car Wash Sampled 12-19-00 <br /> ' of Northern California Reference Number 3389 Received 12-19-00 <br /> 4005 North Wilson Way Sample Description Water Extracted 12-21-00 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 12-21-00 <br /> Attn Tim Cuellar Lab Numbers 3389-1W, 2W 3W 4W Reported 12-29-00 <br /> 1 <br /> TOTAL PETROLEUM HYDROCARBONS-GASOLINE <br /> WITH BTEX DISTINCTION <br /> I <br /> ANALYTE REPORTING LIMIT SAMPLE 10 SAMPLE ID SAMPLE ID SAMPLE ID <br /> SP85053 SP88386 SP8112115 SP8134137 <br /> 12-19-00 12-19-00 12-19-00 12-19-00 <br /> ' (ug1L) (uglL) (uglL) (uglL) (ug/L) <br /> MTBE 050 900 420 51 19 <br /> BENZENE 050 51 11 25 064 <br /> ' TOLUENE 050 79 13 31 071 <br /> ETHYL BENZENE 0 50 13 21 059 ND <br /> TOTAL XYLENES 050 60 96 25 Nn <br /> ' <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 850 260 500' 290' <br /> Report Limit Multiplccation Factor 10 1 1 1 <br /> Report Limit Multiplication Factor MTBE only 20 20 <br /> 0 <br /> ' `Mostly due to large unidentified non-gasoline peaks ' <br /> Surrogate % Recovery HD 406/ Pit) 105/1 F n 02%1 Pfb 102° FID 1IDY 1PlD 108/ FID 967AlPD 949A <br /> ' Instrument ID VAR-GC1 VAR-GCI VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practicai Quantitation (-unit=Reporting Limit x Report Limit Multiplication Factor <br /> 4Cone <br /> ANALYS7APPROVED BY <br /> Ja s Phillips <br /> nvrronmental Lab Director <br /> 1 <br />