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06 April 2012 AGE-NC Project No. 07-1587 Page 2 of 6 impacted soil and ground water from the source UST area. An additional boring is proposed within the City of Stockton Right-of-Way, in the parking lane on the north side of Miner Avenue,east of Hunter Street to defined the eastern extent of hydrocarbon impacted soil and ground water from the location of well MW-2B. One boring is proposed on private property northeast of the intersection of Miner Avenue and Hunter Street to define the eastern extent. Soil-boring locations and designations are depicted in Figure 2. 2.1. DRILLING Soil borings were advanced at the site utilizing a van-mounted Geoprobe 5400 direct-push probing unit equipped with 1.125-inch probing rods. Borings were advanced to varying depths. 2.2. SOIL SAMPLE COLLECTION AND ANALYSIS Samples were collected from the borings at discreet 5-foot intervals using a 1.25-inch Powerprobe soil sampling assembly loaded with two-foot acetate sleeves. Boring log for B7 samples collected every 10 feet. For each soil sample collected, both ends of the selected sleeve section were covered with Teflon sheets, capped, and sealed with tape. Samples were labeled, stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL) a State of California Department of Public Health (CDPH)-certified analytical laboratory. Selected samples were analyzed for: • Total petroleum hydrocarbons as gasoline (TPH-g) and as diesel (TPH-d) in accordance with EPA Method 8015 Modified; and • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the fuel additives methyl-tert-butyl ether (MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME),1,2- dibromoethane (EDB) and 1,2-dichloroethane (1,2-DCA) and all volatile organic compounds in accordance with EPA Method 8260B. Additionally, soils were screened for the presence of volatile organic compounds using an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID) calibrated to an appropriate isobutylene standard.All sampling equipmentwas washed in an Alconox solution and rinsed twice with water prior to each sampling run. All rinseate generated by drilling-related activitieswas containerized in properly labeled department of transportation (DOT)-approved 55-gallon drums,and was stored on-site in an area lacking public access. All soil borings were backfilled over their entire depth with either a Portland cement grout Advanced GmEnvironmental,Inc.