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cleaned before drilling begins and between each boring to prevent the introduction of off-site contamination and cross contamination between borings. Sampling equipment shall be cleaned between sampling events by steam cleaning or using a phosphate-free detergent bath and double rinse to prevent cross contamination. Pre-cleaned brass liners shall be placed in the sampler to retain the soil. The drilling and sampling equipment shall be steam-cleaned subsequent to completion of the exploratory drilling. A field engineer will observe drilling operations and prepare a detailed log of each boring. Soil samples will be obtained at three to five foot intervals. The samples will be retained in 2-inch diameter pre-cleaned brass liners. The soil samples shall be immediately sealed in the liners using teflon sheets, plastic caps, and tape. Labels indicating the date, time and sampling location shall be affixed to each sample. The samples shall be stored on ice and transported under proper chain- of-custody to a state-certified analytical laboratory. Soil cuttings generated during drilling will be placed in 55-gallon containers, which will remain the responsibility of the owner. The drums shall be labeled. At the owner's request, the drums and their contents shall be removed with appropriate sampling, testing and documentation. Soil Probes: Four soil probes shall be conducted in the approximate locations shown on Figure 2. A hand auger will be used to help retrieve soil samples from the undisturbed soil at the bottom and sides of excavation. Soil samples will be collected in 6-inch by 2-inch diameter brass liners. The liners will be sealed using teflon sheets, plastic end caps, and plastic tape. Labels indicating the date, time, and sampling location will be affixed to each sample. The samples shall be stored on ice and transported under proper chain-of-custody to a state-certified analytical laboratory. 3