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approximately 700 feet to the south, cross-gradient of the subject site. The surface body locations . are shown on Figure 1. _Water Well Survey: The California Department of Water Resources records were reviewed in order to determine the location of domestic and production wells within a 2,000 foot radius of the subject site. One domestic well was identified, and is listed in Table 2 and its location is shown on Figure 1. This well is located approximately 500 feet east of the subject site near the intersection of Interstate 5 and West Hammer Lane. The well is used for farm operations including a source of water for a labor camp. This well is located cross-gradient of the subject site. Due to the low gradient it is not likely that the well would be affected by a hydrocarbon plume. The third quarter 2005 Groundwater Monitoring Report, dated September 30, 2005, analytical report shows MtBE at non-detectable levels in MW-9 and MW-10, the eastern most monitoring wells. CONCLUSIONS Three of the four sensitive receptors are located cross-gradient of the subject site. The other sensitive receptor is located up-gradient. One domestic water well, located to the east of the subject site, is cross-gradient. Two surface water bodies, Mosher Slough and a lined community pond were identified within the area surveyed. The North-South arm of Mosher Slough is located to the west and northwest up-gradient of the site. The community pond is located to the south of the site and is located cross gradient. The current groundwater flow direction in the survey area, based on the last four quarters of groundwater monitoring, is to the southeast. It is not probable that a petroleum hydrocarbon release could flow toward and enter Mosher Slough. It is not probable that a petroleum hydrocarbon release could enter the concrete lined community pond due to the low gradient in the vicinity and due to the lining of the pond acting as a barrier. The single domestic well located within 2,000 feet of the subject site, is located cross-gradient of the subject site. Due to the low gradient of the area it is not likely that the well would be affected by a hydrocarbon plume. If you have any questions regarding the contents of this report please do not hesitate to contact me at(925)460-5300. Sincerely, ATC Associates f aWeber, PhD Stephanie Davi Sr. Project Geologist Staff Geologist Attachments: Site Vicinity Map Site Map Sensitive Receptor Table Well Table Sensitive Receptor Survey October 24,2045 Quik Stop #132 Page 2 of 2 3555 W.Hammer Lane Stockton,CA