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NWK �✓ <br /> 15 April 2003 <br /> AGE-NC Project No. 02-0950 <br /> Page 3 of 10 <br /> V <br /> (1,2-DCA) was detected in ground water samples collected from all three borings at a maximum <br /> r <br /> concentration of 54 gg/l.Ethylene dibromide(EDB)was detected in ground water samples collected <br /> from all three borings at a maximum concentration of 190 9g/1. No additional target analytes were <br /> detected at or above laboratory detection limits in the ground water samples analyzed. Additional <br /> information can be found in the AGE-prepared documents Preliminary Investigation and Evaluation <br /> Report dated 30 December 2002 and Preliminary Site Assessment Work Plan dated 13 August 2002. <br /> V <br /> 3.0. SCOPE OF WORK <br /> L Based on analytical data from previous investigations at the site, additional soil and ground water <br /> investigation was required by the EHD to define the lateral and vertical extent of hydrocarbons- <br /> impacted soil and ground water. The proposed scope of work will include the following tasks: <br /> V <br /> • Permitting and pre-field work preparations; <br /> • Soil boring advancement; <br /> V <br /> • Soil and ground water sample collection and analysis; <br /> • Monitoring well installation and sampling; and <br /> • Report preparation. <br /> Each of these tasks is described in greater detail below. <br /> V <br /> 3.1. PRE-FIELD WORK PREPARATIONS <br /> A health and safety plan has been prepared in accordance with Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety <br /> and Health Administration,U.S.Coast Guard and U.S.Environmental Protection Agency, 1985)and <br /> is on file with the EHD. Prior to mobilization, the area of excavation will be clearly marked and a <br /> utility clearance obtained through Underground Service Alert. <br /> 3.2. SOIL BORING <br /> AGE proposes to advance one soil boring (B4) immediately east of the former UST area using a <br /> truck-mounted, hollow stem drill rig equipped with 6-inch diameter hollow-stem augers to further <br /> assess for petroleum hydrocarbon-impacted soil and ground water beneath the site.The proposed soil <br /> boring will be advanced to approximately 50 feet bsg; or until two consecutive non-detect soil <br /> r Advanced GeoEnvironmental,Inc. <br />