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16'0'c tober 1`997' AGE-NC'Project No. 96-0232 ; Page 3 of 5 -. Unified Soil Classificatiori,System (USCS), and were monitoredfo'r the presence of organic.vapor ' .using an organic vapor meter equipped with a photo4onization detectoi(PID: Thermo'Enviroiimental :E ,580A; 10.0 eV; calibrated to isobutylene). Boring-logs are summarized in Appendix A. 2.6: EQUIPMENT DECONTAMINATION All hollow stem au ers-were steam cleaned-prior to'advancing each boring.'All sampling tools and g. kirass sleeves used for sample,collection were thoroughly rinsed with clean Water-.after washing with t' a solution of Alconox. All Geoprobe rods-were cleaned prior to advancement in each probing.' '. 3:0. FINDINGS - - -SOIL PROFILE „ Soil encountered at the site'consisted primarily of silt, clayey silt,,fine'sandy,silt, and fine to coarse sand: The following lithology was`generally encountered beneath the site: A dark brown, damp, fine- sandy silt was encountered from surface grade.to.5 feet bsg. A'in led red=brown•to pale brown, damp, fine to medium satid was encountered,at depths between 5 and 15 feet bsg. Red-brown, moist . to saturated; clayey silt, fine sandy silt and silty sand intervals were'encountered at depths between 15 and�40 feet. A red-brown, saturated, fine to coarse sand was encountered at depths between 40 rand 52 feet bsg, while a brown,.dry silt was encountered at depths between 52 and 60 feet bsg. A ; brown, saturated,-silty fine-�sand was'encounteredbetween 60`and 65%feet, while fine to medium sand and silty fine sand were encountered at depths between b5 and 69 feet:,A brown; moist, clayey silt was encountered at-70 feei,bsg.,Boiing logs`ar'e included in Appendix A, General lithology beneath the site'in cross sectional view.is depicted on,Figure Nos 3. and 4'- Geological'Cross,Section A -A," and GeologicahD-oss Section B -B'. r TED SOIL, AND GROUND WATER' 12 FIELD�EVIDENCE,OF HYDROCARBON-IMPAC Petroleum hydrocarbon'odo'r•was not detected from any'sarnples collected from borings P-.1 through, - , P=S;-however, petroleum hydrocarbon vapor was detected from soil boring'P=1 at;concentrations as high as,45 parts per'millibn (ppin)', and'from P-2'.at concentrations up to 33 ppm: ' y' " Advanced GeoEnvironmenW,Inc.