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' 15 November 2005 • AGE-NC Project No 05-1256 Page 4 of 7 1 33 SOIL LOGGING ' After p sample reservation,soil was extruded from the remaining sleeves and field-screened utilizing p an organic vapor analyzer (OVA) equipped with a photo-Ionization detector (PID Thermo Environmental 580B, 10 0 eV, calibrated to isobutylene) The soil was also described visually in accordance with the Unified Soil Classification System Soil boring logs exhibiting soil profiles are included in Appendix A 3 4 GRAB GROUND WATER COLLECTION AND ANALYSIS After probing to total depth,ground water was encountered at approximately 18 feet to 20 feet bsg, ' a grab ground water sample was collected from each boring The ground water samples were collected using a Geoprobe water sampling assembly with a pre-cleaned, 1-inch diameter 0 01-inch slotted polyvinylchloride(PVC)screen Each sample was extracted by lowering a Teflon hose-bailer j through the hollow center of the push rods into the screened section Ground water samples were transferred into four laboratory-supplied, 40-milliliter (ml) volatile organic analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid solution as a sample preservative, and into one 1-liter amber bottle without preservative After collection,the samples were properly labeled,placed on ice, and transported under chain of custody to CTEL for analysis The samples were analyzed for the petroleum hydrocarbon products listed in Section 3 2 4.0. FINDINGS The stratigraphy and groundwater h dro eology underlying the site were characterized from field descriptions Hydrocarbon impact to soil and ground water was assessed by laboratory analysis 41 STRATIGRAPHY From surface grade to approximately 4 feet bsg, dark brown to black, dry to slightly moist organic ' topsoil was encountered throughout the site, generally underlain by a layer of brown, moist sandy silt and sand to approximately 13 feet bsg From 13 feet to approximately 20 feet to 23 feet bsg, brown, dark brown, and gray-brown clayey silt and silty clay were identified A %z-foot to 1-foot ' thick layer of clayey sand and sandy clay occurs throughout most of the southern portion of the site at a depth of approximately 20 feet to 24 feet bsg,underlain by silty sand and sand to the total depth of the borings Soil boring logs are provided in Appendix A Geologic cross-sections A-A' and B-B' ' are illustrated on Figures 3 and 4, respectively ' Advanced GeoEvironmental,Inc