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'rPombo Property ;t Excavation and Monitoring Well Installation allowing for the increased aerobic decomposition of residual contamination in the source area. The excavation will be backfilled with soils borrowed from uncontaminated portions of the site. Limited laboratory sampling will be conducted for confirmation of residual contamination at the extent of the excavation, characterization for disposal of contaminated material at a permitted facility or onsite aeration permitting and confirmation. The work will be conducted by a licensed contracl or with personnel trained & certified for hazardous material removal. Reporting and Consultation A Technical Report, which documents and discusses all of the activities and laboratory data involved with the project to date, will be generated at the conclusion of the project. The report will include an executive summary of 1he investigation activities and results, a tabulation of all soil and groundwater data, grap ical representation of the geologic and chemical results, a diagram of wells within a 2000 foot radius of the site along with the construction details if available, laboratory data sheets, and any recommendations for further work if data warrants it. The report will be endorsed by the licensed professional responsible for the work. 2.1 Drilling Permits will be obtained as necessary for all wells (including borings) before drilling begins. The soil boring will be accomplished using a mobile mounted drilling rig employing the use of a hollow stern flight auger no less than 3 1/4- inch i.d. and 8 718 o.d. All drilling equipment will be thoroughly team-cleaned before drilling begins, to prevent the introduction of contamination from off site, and between borings to prevent cross contamination. The borings will be logged under th direct supervision of a registered professional using the Unified Soil Classification System. The color, texture, moisture, plasticity (if applicable), consistency of the earth materials, pertinent soil or bedrock characteristics, and any evidence of contamination will be noted. All water-bearing zones and the depths al which they were encountered will be noted on these logs. All b orings w ill b e d rifled i n s uch a in arner a s to p revent c ross c ontamination between strata. Exploratory soil boring within the unsaturated zone will be backfilled with Bentonite and cement. Borings into the saturated zone will be dr lled to a maximum of 20 feet beneath the top of the aquifer being explored. Al y perching layers encountered will be 7