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12 August 2003 <br /> AGE-NC Project No. 03-1042 <br /> Page 2 of 3 <br /> bsg or until groundwater is encountered.The proposed locations ofthe borings are along the western <br /> and southwestern boundaries of the property, adjacent to Filbert and Myrtle streets (Figure 2). <br /> At the first encountered water-bearing zone,a grab ground water sample will be collected from each <br /> soil boring utilizing hydropunch-equivalent sampling techniques,properly labeled, and transported <br /> in a chilled container under chain-of-custody procedures to a State of California DHS-certified <br /> laboratory for analysis for the following constituents: <br /> • TPH-all by EPA Method 8020 in accordance with EPA Method 8015M; <br /> • Volatile organic compounds,including benzene,toluene,ethylbenzene and xylenes(BTEX), <br /> and the fuel additives tertiary butanol(TBA),di-isopropyl ether(DIPE),ethyl tert-butyl ether <br /> (ETBE), tert-amyl methyl ether (TAME), methyl tertiary- butyl ether (MTBE), <br /> 1,2-dichloroethane (1,2-DCA) and 1,2-dibromoethane (EDB) in accordance with EPA <br /> Method 8260B; <br /> • Cam 17 metals in accordance with EPA Method 6010 and <br /> • Hexavalent chromium by EPA Method 7196. <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures to be implemented to advance soil borings, collect groundwater <br /> samples, sample handling, sample analysis, and equipment decontamination are outlined below. <br /> PROCEDURES <br /> Drilling permits will be obtained from the San Joaquin County Environmental Health Department <br /> (EHD).A Site Health&Safety Plan is currently on file with the EHD.Prior to mobilization,the area <br /> of excavation will be clearly marked and a utility clearance obtained through Underground Service <br /> Alert. <br /> Each soil boring will be advanced to the top of the ground water table to collect a grab ground water <br /> sample. Once ground water has been encountered,a hydropunch-equivalent water sampling device <br /> will be driven two to three feet into the water-bearing zone.Ground water samples will be collected <br /> with a hydropunch-equivalent water sampling assembly fitted with one-inch diameter 0.010-inch <br /> slotted temporary well screen. Each ground water sample will be extracted by lowering a bailer <br /> through the hollow center of the drive rods and into the screen section.Depending on subsurface and <br /> drilling conditions, grab ground water samples may also be collected directly through the hollow <br /> stem augers using a new disposable bailer. <br /> Advanced GmEnvironmental,Inc. <br />