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1 ' <br /> 31 March 2005 <br /> • AGE-NC Project No 03-1080 <br /> ' Page 5 of 7 <br /> ' Ground water samples were transferred into four laboratory-supplied, 40-milliliter (ml) volatile <br /> organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid solution as a sample <br /> preservative, and into one 1-liter amber bottle without preservative After collection, the samples <br /> were properly labeled, placed on ice,and transported under chain of custody to CTEL for analysis <br /> The samples were analyzed for the petroleum hydrocarbon products listed in Section 3 2 <br /> 4.0. FINDINGS <br /> ' The stratigraphy and ground water hydrogeology underlying the site were characterized from field <br /> descriptions Hydrocarbon impact to soil and ground water was assessed by laboratory analysis <br /> ' 41 STRATIGRAPHY <br /> ' From surface grade to approximately 10 feet bsg, dark to light brown silty sand was encountered in <br /> all three bore holes,characteristically,the material was fine-grained,poorly graded,and moist This <br /> • material extended to 15 feet bsg in B 1,while gray brown clayey silt and silt with low plasticity, low <br /> ' to moderate consistency, and low toughness were encountered in B2 and B3 at 15 feet bsg At <br /> 19 5 feet bsg,a thin layer of moist,orange brown and gray brown fine-grained soil was encountered <br /> ' in borings 131, B2, and B3 This material was characterized by low plasticity, low to moderate <br /> consistency, and low toughness At approximately 20 feet bsg, a layer of light brown and orange <br /> brown, fine- and medium-grained silty sand and clean sand was identified At 25 feet bsg, a <br /> ' distinctive layer of orange, dark, and gray brown clay and clay with silt was encountered This clay <br /> had low plasticity, moderate to high consistency, and low to moderate toughness At 30 feet bsg in <br /> all three borings, gray and orange brown silty sand and sandy silt were encountered This material <br /> ' extended to 35 feet bsg in B2 and B3 At 35 feet bsg in B1, orange brown silty clay of moderate <br /> plasticity and consistency and low toughness was identified At 40 feet bsg in B 1, gray brown silt <br /> with low plasticity and moderate consistency and toughness was encountered <br /> Hydrocarbon odor was detected in soil samples collected from boring BI at 5 feet, 15 feet, and <br /> 20 feet bsg, from boring B2 at 30 feet bsg, and from boring B3 at 10 feet bsg Organic vapor was <br /> ' detected by the OVA in soil samples collected from boring B I at concentrations as high as 200 parts <br /> per million (ppm), in sample B1-15 Soil boring logs are provided in Appendix D <br /> ' 42 HYDROCARBON-IMPACTED SOIL <br /> ' A total of ten soil samples from soil borings BI through B3 were analyzed for the petroleum <br /> hydrocarbon products listed in Section 3 2 The following target analytes were detected <br /> ' Advanced GeoEvironmental,Inc <br /> l <br /> 1 ' <br />