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Surface and Subsurface Contamination Report 1 erracon 6671 &7101 E. Highway 12 ■ Lodi, California September 22, 2015 ■Terracon Project No. NAI 57033 Exterior Onsite Observations Pits, Ponds, Lagoons? None observed. Stained soil or pavement? Soil staining was apparent under the drums and containers located along the southern site boundary. Solid waste? Approximately thirty tires were observed along the southern site boundary. Waste water discharge? None observed. Wells or septic systems? Two agricultural wells were observed at the southeastern and southwestern portions of the site. Vicinity Observations Topography of property and The site is divided by a bluff located on the southern vicinity portion of the site from the lower northern portions of the site. A levee surrounds the site on the north, east and west sides. Current use of adjoining The Mokelumne River is located to the adjoining north, properties northeast and northwest of the site followed by agricultural land. Rural residences and agricultural land are located to the adjoining east, west and south of the site. One approximately 300 gallon AST, contents unknown, was observed on the adjoining residential property address of 6671 E. Highway 12 and not within secondary containment. Evidence of past uses? None observed. Current land uses in area Agricultural land use. Evidence of past uses? None observed. 3.2 Past On-Site Sources of Contamination No above- or below-ground on-site potential or known sources of contamination were identified /� J from past uses of the site, except for the following: • Agricultural chemicals, including abamectin and paraquat dichloride have been applied to the site. • An approximately 300 gallon AST containing diesel has been used on the site. • Three 55 gallon drums, two 25 gallon drums, and three 5 gallon containers of oily substance were located on the site. • Approximately 30 tires were located on the site. Responsive ■ Resourceful ■ Reliable 8