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30 October 2000 ' AGE-NC Project No. 99-0624 Page 6 of 8 ' gallons of water per 94-pound sack of cement The grout was placed by pumping through the center of the auger while the augers were incrementally raised. The monitoring well design is presented In ' Figure 3 ' 3 9 EQUIPMENT DECONTAMINATION All hollow stem augers were steam-cleaned prior to advancement m each boring, tools and brass ' sleeves used were cleaned by the procedures described In section 3 4 ' 4.0. FINDINGS Based on the findings of the first phase of work the second phase was initiated Results from both ' probing and drilling are discussed and presented together below Soil stratigraphy(l thology)for the site, were determined from field data. Hydrocarbon-impacted soil and ground water was characterized from field and laboratory analytical data. 1 41 SOIL PROFILE ' In general,a brown to olive-green/ aY�damp silty sand/sandy silt/silty clay,was encountered from ' surface grade to depths of approximately 35 feet bsg in each boring Generally, a brown to gray, damp silty sand/fine sand was encountered from 30 feet to 45 feet bsg A light brown to olive- green/gray moist clayey silt/silty clay was encountered from depths of 45 feet to 65 feet bsg ' ,Saturated soil was first encountered In most borings at depths between 55 feet and 60 feet bsg Boring logs and cross-sections A-A' and B-B' are included In Appendix A and in Figures 4 and 6, ' respectively ' 4 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER Organic vapor was detected in soil sample duplicates collected from P2-30', MW-2-25', and MW-2-45' at concentrations of 5 parts per mullion (ppm), 6 ppm, and 10 ppm, respectively. Additionally, lesser organic vapor concentrations were detected in soil sample duplicates collected from borings P 1 and P2 • Advanced GeoEnvaronmentai,Inc