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Horizon Environmental Inc. FIELD METHODS AND PROCEDURES The following section describes field procedures that will be utilized by Horizon Environmental Inc.(Horizon) personnel in performance of the tasks involved with this project. 1.0 HEALTH AND SAFETY PLAN Field work performed by Horizon and subcontractors at the site will be conducted according to guidelines established in a Site Health and Safety Plan (SHSP). The SHSP is a document that describes the hazards that may be encountered in the field and specifies protective equipment, work procedures, and emergency information. A copy of the SHSP will be at the site and available for reference by appropriate parties during work at the site. 2.0 LOCATING UNDERGROUND UTILITIES Prior to commencement of work on site, the location of underground utilities will be researched with the assistance of Underground Service Alert (USA). USA will contact the owners of the various utilities in the vicinity of the site to have the utility owners mark the locations of their underground utilities. Work associated with the boring and monitoring well installation will be preceded by manual hand augering to a minimum depth of 5 feet below grade to avoid contact with underground utilities. 3.0 SOIL EXCAVATION Permits will be acquired prior to the commencement of work at the site. If a mobile laboratory is not available to analyze excavated soil, the soil will be evaluated using a field calibrated (using isobutylene) Thermo- Environmental Instruments Model 580 Organic Vapor Meter (OVM) or equivalent instrument. This evaluation will be done upon arrival of the soil at the ground surface in the excavator bucket by removing the top portion of soil from the bucket, and then placing the intake probe of the OVM against the surface of the soil in the bucket. Field instruments such as the OVM are useful for measuring relative concentrations of vapor content,but cannot be used to measure levels of hydrocarbons with the accuracy of laboratory analysis. Samples will be taken from the soil in the bucket by driving laboratory-cleaned brass sleeves into the soil. The samples will be sealed in the sleeves using Teflon sheets, plastic caps, and plastic zip-lock bags; labeled; and promptly placed in iced storage. If mobile laboratory or field subjective analyses suggest the presence of hydrocarbons in the soil, additional excavation and soil sampling will be performed,using similar methods. If groundwater is encountered in the excavation,groundwater grab samples will be collected from the excavation using a clean Teflon® bailer. The groundwater samples will be collected as described below under "Groundwater Grab Samples". The excavation will be backfilled or fenced prior to departure from the site. 4.0 GROUNDWATER GRAB SAMPLES Groundwater grab samples will be obtained from the excavation using a clean teflon bailer. The samples will be transferred to appropriate clean glass containers in such a manner as to minimize loss of volatile constituents, and so that there is no headspace in the sample container and air bubbles are not present in the samples when they are inverted. If air bubbles are found, resampling will occur. The samples will be refrigerated and transported promptly to the laboratory.