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HORIZON ENVIRONMENTAL INC. 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 SOIL EXCAVATION AND SAMPLING 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;ed and promptly placed in iced storage.age. If groundwater is encountered in the excavation, groundwater grab samples will be collected from the excavation using a clean Teflon bailer. The excavation will be backfilled or fenced prior to departure from the site. Composite characterization samples will be collected from soil stockpiles generated at the site. A composite sample is two to four sample locations (as discrete samples) per composite. The composite characterization samples will be collected from the stockpiled soil by selecting random locations accessible around the soil pile, removing approximately six inches of soil, and driving a clean brass sleeve into the soil pile at the selected location. The number of samples collected will be based on the estimated amount of stockpiled soil. Generally, one composite soil sample is collected per approximately 50 to 100 cubic yards of soil. All samples collected will be prepared and chilled for transport under Chain-of- Custody protocol, and sent to Kiff Analytical, a State-certified laboratory in Davis, California (Certification No. 2236). 3001-2I.0vx B-I HORIZON ENVIRONMENTAL INC.