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�.. S"I Proposed Work Tasks Regulatory File Search Wright will perform a regulatory file search of the State and local regulatory databases, and of the PHS-EHD files to a one-mile radius. The purpose of this search is to identify possible nearby sources of petroleum contaminants, which may have migrated onto the site. Exploratory Drilling and Soil Sampling Five borings will be positioned to ascertain distribution of the contaminants in groundwater. Drilling permits will be secured from the PHS-EHD, and all utilities will be cleared prior to doing the fieldwork. The borings will be advanced to depths of about 20- to 25-feet with the exception of the boring next to the water well, which will be advanced to about 45-feet if possible. Borings will be advanced to depths at which contaminants do not appear to be present, based upon field data. Wright will attempt to gain two consecutive none detected samples to define the lower contaminant penetration, which based upon the previous work, was at about the 20- to 25-foot depth. Moderate to severe flowing conditions were encountered in previous boreholes, which required drilling methods to be alternated between push and auger drilling depending upon the severity of the flowing condition. Please note that some soil samples may not be recoverable in instances of severe flowing since the sampler may not be advanced to the desired depth. The boreholes will be drilled with truck mounted hollow stem auger and/or direct push drilling equipment. All drilling equipment and sampling tools will be cleaned prior to arriving, between driving samples and before leaving the site. The augers or drill rods will be advanced to the desired sampling depth interval, and a drive split spoon sampler will be driven ahead of the drill bit. The sampler will be retrieved and dissembled, and any soil filled brass or acetate liners retained for chemical analysis, will be sealed with Teflon® paper or foil and plastic end caps. Each sample will be labeled, logged onto chain-of-custody forms and place in a chilled ice chest on crushed ice. Drill cuttings will be drummed and left on-site. The boreholes will be logged using the Unified Soil Classification System under the supervision of a registered geologist. Additional lithologic information may be collected to describe the subsurface geology. Soil samples will be field screened for presence of contaminants by checking for presence of odor and staining, and a photo ionization meter will be used for soil field vapor measurement use. This reconnaissance field vapor data will be used to select soil samples for analysis and note potential contaminant presence. Soil samples will be collected at no greater that five-foot vertical intervals, with additional samples collected at intervals of obvious contamination and at stratigraphic features of interest using field discretion. M&M Builders Supply 9 10/16/2000 Wright Project No.4669