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CHRONOLOGY CONTINENTAL GRAIN COMPANY 1805 HARBOR STREET LOP SITE CODE: 1132 CVRWQCB CASE # 390229 APN: 14502005 01/22/88 On this date a 750 gallon gasoline underground storage tank (UST), two 12,000 gallon diesel USTs and a 10,000 gallon UST were removed under the Environmental Health Department (EHD) permit and inspection. Soil samples were collected from below each UST. Samples from the 750 gallon UST and the 10,000 gallon UST were positive for TPH and further soil and ground water assessment was required. No contaminants were found in the soil from beneath the 12,000 gallon USTs so no further investigation was required in this location. 03/17/88 EHD filed an Unauthorized Release Report and a Notification of Hazardous Waste Discharge Report on this date. 07/10/97 The site was placed in the Local Oversight Program on this date. 10/07/97 On this date one boring, SB7, was completed at the 750 gallon UST location and six borings, SB1-S136, were completed at the 10,000 gallon UST location. Soil and ground water samples were collected for analysis. 11/24/97 Date of Summary Report Subsurface Investigation prepared by Smith Environmental for the work conducted in October 1997, 02/18/98 Date of EHD letter requiring additional investigation of the 10,000 gallon UST location and no further investigation of the 750 gallon UST location. 08/12/98 Monitoring wells MW1 — MW3 were installed in the area of the 10,000 gallon UST on this date. Ground water samples documented contamination. 10/19/98 The date of the Summary Report of Additional Subsurface Investigation prepared by ATC Associates Inc. that discusses the August 1998 work. 04/20/00 Geoprobe borings S68— SB10 were completed on this date. 0615-30100 Monitoring wells MW4 — MW6 and soil boring SB12 were completed during this time. 11/09/00 The date of the Summary Report that discusses the work completed in April and June 2000. 06/18/02 The date of a Corrective Action Plan prepared by ATC. 09/09/02 The date of the EHD letter not approving the Corrective Action Plan (CAP) and requesting a work plan to further investigate the extent of the soil and groundwater contamination.