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HORIZON ENVIRONMENTAL INC. f FIELD METHODS AND PROCEDURES The following section describes field procedures that will be completed 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 borings and monitoring well installations will be preceded by manual hand augering to avoid contact with underground utilities. 3.0 SOIL BORING AND SOIL SAMPLING PROTOCOL Soil borings and soil sampling will be performed under the supervision of a Horizon geologist. The soil borings will be advanced using a truck-mounted hollow-stem auger drilling rig. To reduce the chances of cross-contamination between boreholes, downhole drilling equipment and sampling equipment will be cleaned between borings. To reduce cross-contamination between samples, the split-barrel sampler will be washed in a soap solution and double-rinsed between each sampling event. Soil sampling will be conducted in accordance with ASTM 1586-84. Using this procedure, a split-barrel sampler (California-type sampler) lined with brass sample sleeves will be driven into the soil at approximately five-foot intervals by a 140-pound weight falling 30 inches. The number of blow counts required to advance the sample 18 inches will be recorded at each sample interval. Generally, the bottom soil sample will be sealed in the brass sleeve and stored at approximately 40C for transport to the laboratory. The soil samples will be sealed in the sleeves using Teflon sheets and plastic caps; labeled; and promptly placed in iced storage. I Generally, the upper portions of each soil sample will be extruded from the brass sleeves, placed in a plastic bag, and sealed for later screening with a field calibrated (using isobutylene) Thermo Environmental Instruments Model 580 Organic Vapor Meter (OVM). Another portion of the soil sample was used for classification and description. After the portion of the soil sample is placed in the plastic bag, it will be allowed to warm, inducing volatilization of petroleum hydrocarbon vapors. The headspace vapors will then be } screened with the OVM. The highest observed reading will be recorded on the boring logs. Composite characterization samples will be collected from soil stockpiles generated at the f site. A composite sample is four sample locations (as discrete samples) per composite. I Project No. 1463-11 B- I HORIZON ENVIRONMENTAL INC. i I