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' 18 November 2005 - <br /> . AGE-NC Project No 02-0962 <br /> Page 4 of 7 r <br /> 1 <br /> ' t <br />' 2 2 2 Collection and Analysis of Ground Water Samples <br /> Ground water samples were collected from each monitoring well using a Waterra inertia pump and <br /> dedicated tubing after allowing the wells to achieve a minimi m 80%recovery of the pre-purge water -' <br />' volume The samples from each well were transferred into three 40-milliliter(ml) volatile organic <br /> analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid solution as a sample preservative,and ` <br />' into one 1-liter amber bottle without preservative The samples were labeled with the monitoring <br /> well designation, date, time of sampling, and the sampler's initials and transported in a chilled <br /> container under chain of custody to CTEL for analysis for the constituents listed in Section 2 1 1 <br /> 23 WASTE SOIL DISPOSAL <br />' On 27 September 2005, approximately 2,970 pounds of non-hazardous soil were removed from the <br /> site Disposal was completed by Slaby Environmental,Inc of Borrego Springs,California The waste <br />' soil was taken to L&D Landfill, located in Sacramento, California A copy of the waste disposal <br /> manifest is included in Appendix F <br /> • 3.0. FINIDINGS <br /> Soil stratigraphy and ground water elevation,flow direction,and gradient were determined from field <br /> data The contaminant impact to soil and ground water was quantified from laboratory analysis <br /> 31 STRATIGRAPHY <br />' In general,brown clayey silt was encountered from surface grade to between 20 feet and 25 feet bsg, <br /> characteristically, the material had low plasticity and toughness The silty clay was underlain by <br />' brown to'gray,moist to saturated,poorly graded sandy silt and silty sand to a depth of approximately <br /> 3 0 feet bsg except in boring MW-5,where a layer of brown clayey silt and gray clay was encountered <br /> between 25 feet and 30 feet bsg At 35 feet bsg, the total depth of the borings, gray, fine-grained, <br />' poorly graded micaceous sand was encountered Geologic cross-sections A-A', B-B', and C-C,' are ' <br /> illustrated on Figures 3, 4, and 5, respectively Soil boring logs are provided in Appendix B <br /> 32 ANALYTICAL RESULTS OF SOIL SAMPLES ' <br /> A total of sixteen soil samples were analyzed for the constituents listed in Section 2 1 1 <br />' , Advanced GeoEnvironmental,Inc <br />