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tThe Site is a small part of the proposed Manteca FEZ development that generally includes construction of baseball and soccer fields, volleyball courts, restaurants, indoor all-season sport ' and expo center, outdoor stadium,manmade lake, family entertainment and adventure zones, trails, and associated landscape, parking, and support buildings. ' Remedial Investigation Summary The following field investigation activities were completed September 11 and 14, 2015 by ' Geocon (Geocon 2015): 1. Three direct push soil borings were advanced to a depth of 10 feet. Soil samples were ' collected at 0-1, 1-2, 3-4, 4-5, and 9-10 feet(18 samples total). Borings were then advanced to groundwater(stabilized at 13 feet below ground surface)where grab groundwater samples were collected. All soil samples were analyzed for total lead,two ' samples with elevated total lead concentrations were analyzed for soluble lead using the Waste Extraction Test(WET)method, and one sample with elevated total lead was analyzed for soluble lead using the Toxic Characteristic Leaching Procedure (TCLP) ' method. Two groundwater samples were analyzed for total dissolved lead and one groundwater sample was analyzed for California Assessment Manual (CAM) dissolved ' metals. 2. Total lead readings were collected at 152 surface soil locations (includes 12 background locations) with a portable X-Ray fluorescence (XRF) device. Soil samples were ' collected for laboratory analysis to validate XRF readings at 27 (includes 4 of the 12 background locations) of the 152 XRF locations. Samples were generally collected at the ' surface with one sample collected at depth of 0.5 feet(Location 52) and two duplicate samples were collected (30 samples total). A total of 26 samples were analyzed for total lead and four samples were analyzed for CAM metals. Soluble lead concentrations were ' determined in four samples with elevated total lead using the WET method and 12 samples with elevated total lead using the TCLP method. ' 3. Seven trenches were excavated in the primary impact berm and side berms. Total lead readings were collected with the XRF at 0.5, 1, 1.5,2, and 2.5 feet from each sidewall (70 sample locations). ' 4. Metal detecting was performed to determine depth of bullet penetration in the impact berm using a Minelab Explorer with a Sunray integral pinpointer. ' XRF readings and metal detection findings indicate that bullets penetrated the berm to a depth of 2.5 to 3 feet. Total lead concentrations in soil samples collected from a depth of one foot or greater ranged from<1 to 31 mg/kg. Total lead concentrations in surface soil ranged from 7.9 to 42,000 mg/kg; soluble WET lead concentrations ranged from 3.7 to 1,100 mg/l; and, soluble TCLP lead ' concentrations ranged from 0.29 to 1,400 mg/l. Other metals were detected in soil including antimony, arsenic, barium, copper,vanadium, and zinc. 1 Allk%' PACIFIC EDGE ENGINEERING iii SREW_Manteca_draft.doex ' (949)470-1937;(949)470-0943(FAX)