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i HORIZON ENVIRONMENTAL INC. FIELD 11+1ETHODS AND PROCEDURES The following section describes field procedures that will be completed by Horizon Environmental I Inc.(Horizon) personnel in performance of the tasks involved with this:project. LO HEALTH- AMD SAFE': P, I 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 iso 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.UNDERditO06 UTIL 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 markthe locations of their underground utilities. Work associated with the boring and inonitoring well installation will be preceded by manual hand augering to a•-minimum depth of 4 feet below grade to avoid contact with underground utilities. I 3.0 _S I1L EXCAVATION: AM SAWLING Permits will be acquired prior tojhe 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 adjacent to the•surface of the sail 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 and plastic caps;labeled;and promptly placed in iced storage; If mobile laboratory; or field subjective analyses suggest the presence of hydrocarbons in the:Fsoil, additional excavation and soil sampling may be performed. using similar methods. If groundwater is.encountered inthe excavation, groundwater grab samples will be collected from the excavation using a clean disposable bailer. The groundwater samples vrill be collected as described below under,:"Groundwater Grab Samples". The excavation will'be backfilled or fenced prior to depa6c from the site. Composite characterization satttples wilG'be collected from soil stockpiles generated at the site. A composite sample is 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 brsss sleeve into the soil pile at the selected location.IMc number of samples collected will be based on the estimated amount of stockpiled snit:Generally,one composite soil'samPle is collected per 50 or