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n FIELD PROTOCOL Site Safe tv Plan Field work is performed by ERI personnel in accordance with a site safety plan developed for the site This plan describes the basic safety requirements for the subsurface investigation and the drilling of soil borings at the work site The site safety plan is applicable to personnel and subcontractors of ERI Personnel at the site are informed of the contents of the site safety plan before work begins A copy of the site safety plan is kept at the work site and is available for reference by appropriate parties during the work The ERI geologist acts as the Site Safety Officer Pre-Drilling Protocol Prior to drilling of borings, ERI acquires necessary permits from the appropriate agencies ERI also contacts Underground Service Alert (USA) and a private utility locator before drilling to help locate public utility lines at the site ERI observes the driller hand auger proposed boring locations to a depth of approximately 5 feet below ground surface to reduce the risk of encountering underground utilities Direct Drive Push-Technology Drdhng Cone penetrometer and continuous core soil borings are drilled using a portable, truck-mounted pneumatic sampling device capable of pushing and/or driving a 2-inch core barrel into the subsurface The core barrel has a 4-foot plastic sleeve inserted to help sample retention The core barrel (approximately 4 feet long) is pushed/driven into the subsurface, retrieved to the surface, and the plastic liner extracted The soil samples will be evaluated using the Unified Soil Classification System (USCS) When groundwater is encountered in the borings, a bailer or Hydropunch® type sampler is used to collect a reconnaissance groundwater sample After drilling and sampling is completed, the boring is abandoned using bentonite chips to the original surface During drilling, soil samples are collected from the core barrel at approximately 5-foot intervals and dust above the groundwater surface Soil samples are monitored with a photoionization detector (PID), which measures hydrocarbon concentrations in the ambient air or headspace above the soil sample Field instruments such as the PID are useful for indicating relative levels of hydrocarbon vapors, but do not detect concentrations of hydrocarbons with the same precision as laboratory analyses Soil samples selected for possible chemical analyses are sealed promptly with Teflon® tape, and plastic caps The samples are labeled and placed in iced storage for transport to the laboratory Chain of Custody Records are initiated by the geologist in the field, updated throughout handling of the samples, and sent with the samples to the laboratory Copies of these records are in ERI's report Cuttings generated during drilling are placed on plastic sheeting and covered and staged at the site ERI coordinates with