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r r r r r r t r r r r r r r r Monitoring Report:7500 West Eleventh Street, Tracy,CA well Date TPHd TPHg Benzene Toluene Ethyl- Total TBA MTBE TAME DIPE ETBE 1,2-DCA EDB Ethanol Lead No. Sampled benzene Xylenes µg/L µg/L µg/L µg/L µg11- µg11- µg/L µg/L µ91L µg/l- µg/L µg/L µg/L µg/L mg/L MW-12A 01/26/04 n/s n/s n/s n/s n/s n/s nls nls n/s n/s n/s n/s n/s nls n/a 04/11/02 ND NO ND NO NO NO NO ND ND NO ND n/a n/a NO n/a 07/29/02 ND NO NO NO ND NO ND ND NO NO NO n/a n/a n/a n/a 10/25/02 ND 14 ND NO ND ND ND ND ND ND NO NO n/a n/a n/a n/a 01/20/03 NO ND ND ND ND ND ND NO ND NO ND n/a n/a n/a n/a 04/15/03 ND 15 NO NO NO NO NO NO ND NO ND NO n/a n/a n/a n/a 07/30/03 n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s n/a 10/27/03 n/s nls n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s nls n/s n/a 01/26/04 n/s n/s n/s nls n/s n/s n/s n/s n/s n/s n/s n/s n/s n/s nls Notes: (1) Chromatogram Pattern: Unidentified Hydrocarbons<C16 (2) Chromatogram Pattern: Unidentified Hydrocarbons>C16 (3) Chromatogram Pattern: Unidentified Hydrocarbons C9-C24 (4) Chromatogram Pattern: Gasoline C6-C12 (5) NO= Not Detected above the Method Detection Limit(MDL). (6) n/a=not analyzed (7) Hydrocarbon reported does not match the pattern of the laboratory's Diesel standard. (8) Hydrocarbon reported does not match the pattern of the laboratory's gasoline standard. (9) Hydrocarbon reported is in the late Diesel range,and does not match the laboratory's Diesel standard (10)Sample contains discrete peak in addition to gasoline. (11) Floating Product in well. (12)Laboratory reported 130 pg/L of an organic analyte which is NOT a fuel hydrocarbon in sample. (13)Laboratory reported 100 µglL of an organic analyte which is NOT a fuel hydrocarbon in sample. (14)Laboratory reported 100 µg/L of an organic analyte which is NOT a fuel hydrocarbon in sample. (15)Sample aliquot treated with silica gel before analysis for diesel range compounds. (16)Sample aliquot filtered before analysis for diesel range compounds. (17) n/s=Well Not Sampled Page 6 of 6 Results of Anayses sic