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' 30 June 1999 <br /> AGE-NC Project No. 98-0468 <br /> 'Page 7 of 12 <br /> analytical methods are presented in Section 4.2. Ground water sampling procedures and protocols <br /> ' implemented at the site are presented in Appendix A. <br /> Prior to collection of ground water samples, each monitoring well was appropriately purged and <br /> ' ground water parameters including,dissolved oxygen, temperature, pH, and conductivity were <br /> measured for stabilization. Ground water sampling field data and logs are presented in Appendix C. <br /> Monitoring well purge water and equipment decontamination water generating during the ground <br /> water sampling activities were containerized in appropriately labeled 55.-ga1lon drums and stored on- <br /> site. <br /> 5.0. FINDINGS <br /> Discussion of shallow subsurface soil profile observed at the.site, as well as soil and ground water <br /> analytical results are presented below. <br /> 5.1.- SHALLOW SUBSURFACE SOIL PROFILE <br /> lie <br /> In general, shallow subsurface soil at the site appears to consist primarily of interbedded units of <br /> fine-grain(silt and clay)deposits and coarse-grained(sand)deposits. Based on soil samples collected <br /> ' from soil borings B-1 through B-3, B-4, and B-5, relatively coarse-grained soil consisting of sand <br /> with silt, silty sand/sandy silt,and silty sand were encountered from ground surface to approximately <br /> 5.5 to 8.5 feet bsg. The coarse-grain soils appeared to be underlain primarily by fine-grained deposits <br /> ' consisting of sandy silt, silt;and silty clay to a depth of approximately 18.5 feet bsg. Additionally, <br /> a silty sand.and clayey sand layer was described at a depth of 11 to 13 feet bsg for.soil boring SB 5. <br /> Clayey.sand was observed for soil boring SB-4 from 18.5 feet bsg to the total depth of the boring of <br /> 1 21 feet bsg. Logs of the soil borings are presented in Appendix B. <br /> ' Saturated soil was encountered in the soil'borings at,approximately 8.5 to 11 feet bsg. However, <br /> measured static water levels within the soil boring's varied from 7.60 to 8.20 feet bsg. <br /> ' No petroleum hydrocarbon staining or odor was.apparent,for any of the soil and ground water , <br /> samples collected. <br /> 5.2. GROUND WATER ELEVATION, FLOW DIRECTION•ANO GRADIENT <br /> ' On 06 May 1999, ground water monitoring activities were conducted at the site. Gro6d water <br /> . monitoring included collection of ground 'water elevation measurements from each of the,site <br /> Advanced CeaEnvironmental,Inc. <br />