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FIELD PROCEDURES Working To Restore Nature I Site Safety Plan The site safety plan describes the basic safety requirements for the drilling of soil borings at the work site The safety plan is applicable to personnel of RESNA and to subcontractors of RESNA. The representative from RESNA acts as the Site Safety Officer Personnel at the site are informed of the contents of the site safety plan before work began A copy of the plan is kept at the work site and is available for reference by appropriate parties during the work i Drilling and Soil Sam lin Before drilling, soil borings are started by hand-augering to a depth of approximately 5 feet to reduce the risk of damaging underground structures. The soil borings are drilled using a truck-mounted drill rig equipped with 8-inch-diameter, continuous-flight, hollow-stem augers The drilling is performed under the guidance of a field geologist Relatively undisturbed soil samples are collected from each boring at 5-foot intervals or other appropriate intervals from the ground surface to the total boring depth, identified using visual and manual methods, and classified according to the Unified Soil Classification System. Soil samples are collected using a California-modified, split-spoon sampler equipped with clean brass sleeves Samples are collected by drilling the boring to a point dust above the sampling depth and then driving the sampler into the soil through the hollow center of the auger. The split-spoon sampler is driven 18 inches with a standard 140-pound hammer dropped 30 inches The number of blows required to drive the sampler each successive 6- inch interval is counted and recorded on the field boring log to give an indication of soil consistency Soil samples are evaluated for relative levels of hydrocarbons using a photoioruzation detector (PID) Field instruments such as the PID provide a preliminary assessment of the total volatile constituents and cannot identify or distinguish between individual compounds The PID may also be affected by moisture, fluctuations in the air and/or soil temperature, and the specific soil type Subjective evidence of hydrocarbons such as soil discoloration or obvious odor are noted Soil samples collected for possible chemical analysis are promptly sealed with aluminum foil, plastic caps, and tape They are then labeled and placed in iced storage for transport to the analytical laboratory A Chain of Custody Record is initiated by the field geologist and accompanied the samples to the laboratory • asi0.4-ar 30004-1OW