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CHRONOLOGY Ace Tomato Company Incorporated Page 2 07/09/04 The EHD approves work plan dated June 28, 2004, for the advancement of four borings. 10/20/04 Advancement of four soil borings and collection of eight soil samples and four groundwater samples for analysis of benzene, toluene, ethyl benzene, total xylenes (BTEX); TPH-g; total petroleum hydrocarbons as diesel (TPH-d); MTBE, di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), TBA, methanol, ethanol, 1,2-dichloroethane (1,2-DCA), and 1,2-dibromo ethane (EDB). 12/21/04 Date of Preliminary Soil and Groundwater Site Assessment report. Only soil sample, B-2-7@ 36', contained detected concentrations of TPH-d at 1.1 mg/kg. All other soil results were reported as non-detect. Of the four groundwater samples collected and analyzed: TPH-d was detected in boreholes B-1 at 64 micrograms per liter (pg/L), B-2 at 79 gg/L, and B-4 at 62 p.g/L; TPH-g was detected in boreholes B-2 at 270 pg/L and B-3 at 65 pg/L; and ethanol was detected in boreholes B-2 at 43 gg/L and B-3 at 6.3 µg/L. All other groundwater results were reported as non-detect. 3/16/05 The EHD sent a letter directing the analytical laboratory, Kiff Analytical LLC, review the sample chromatographic patterns for method 8015B to determine whether the sample patterns matched fuel chromatographic patterns other than TPH-g and TPH-d standards, and review sample chromatograms from the analysis by method 8260B for possible correlations with the discrete peaks found during the sample analysis by method 8015B. 7/17/06 Kiff Analytical LLC responded that the chromatographic pattern by method 8015B for soil sample B-2-7@ 36' did not exhibit a typical TPH-d pattern and since the hydrocarbons appeared at a higher boiling point range, suggested the hydrocarbons may be from lubricating oil. Kiff Analytical LLC stated that the chromatographic patterns by method 8015B for groundwater samples collected from boreholes B-1, B-2, and B-4 did not exhibit typical TPH-d patterns; based on the chromatograms by method 826013, each of the three groundwater samples contained a single peak, tentatively identified as dodecane. Kiff Analytical LLC also stated that the chromatographic patterns by method 8015B for groundwater samples collected from boreholes B-2 and B-3 did not exhibit typical TPH-g patterns and instead were identified as discreet peaks for chloroform. The laboratory reported chloroform at 260 pg/L in groundwater samples collected from borehole B-2, and 50 µg/L in groundwater samples collected from borehole B-3.