SITE INFORMATION AND CORRESPONDENCE FILE 2

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Nomellini Property December 2013 1045 West Charter Way, Stockton Claim No : 552 ATTACHMENT 2 : SUMMARY OF BASIC CASE INFORMATION (Conceptual Site Model) Site Location/History • This Site is a warehouse building and is bounded by a business across Charter Way to the south , a commercial business to the west , a commercial petroleum fueling facility to the east, and industries across Navy Drive to the north . There is a drainage ditch located approximately 60 feet from the Site south of Charter Way. • Site maps showing the location of the former USTs , monitoring wells , groundwater level contours, and benzene concentration contours are provided at the end of this review summary (Advanced GeoEnvironmental Inc. , 2013) . • Nature of Contaminants of Concern : Petroleum hydrocarbons only. • Source : UST system . • Date reported : September 1988 . • Status of Release: UST removed . Tank Information Tank No. Size in Contents Closed in Place/ Date Gallons Removed/Active 1 -2 1 , 000 Gasoline Removed August 1988 Receptors • GW Basin : San Joaquin Valley- Eastern San Joaquin . • Beneficial Uses : Central Valley Regional Water Quality Control Board ( Regional Water Board ) Basin Plan lists agricultural , municipal , domestic, industrial service and process supply. • Land Use Designation : Aerial photograph available on GeoTracker indicates mixed residential and commercial land use in the vicinity of the Site. • Public Water System : California Water Service . • Distance to Nearest Supply Well : According to data available in GeoTracker, there are no public supply wells regulated by the California Department of Public Health 1 , 000 feet of the Site . No other water supply wells were identified within 1 , 000 feet of the Site in the files reviewed . • Distance to Nearest Surface Water: There is no identified surface water within 1 , 000 feet of the Site . Geology/Hydrogeology • Stratigraphy : The Site is underlain by interbedded and intermixed sand , silt, and clay. • Maximum Sample Depth : 115 feet below ground surface (bgs) . • Minimum Groundwater Depth : 12. 25 feet bgs at monitoring well MW-9 . • Maximum Groundwater Depth : 21 . 44 feet bgs at monitoring well MW-2 . • Current Average Depth to Groundwater: Approximately 14 feet bgs . • Saturated Zones(s) Studied : Approximately 22 - 115 feet bgs . • Appropriate Screen Interval : Yes . • Groundwater Flow Direction : South-southeasterly with an average gradient of 0 . 002 feet/foot (August 2013) . Page 6 of 14