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( VYATC A S S O C I A T E S I N C SCOPE OF WORK Planning and Permits ATC has completed the soil boring permit application for the proposed subsurface investigation. The permit application and associated fees (check no. 114) are attached to this workplan. ATC will also schedule field personnel and equipment, notify Underground Service Alert to locate underground utilities as required, and perform any other necessary field preparation and job start- up activities. Advancement of Soil Boring To determine the vertical extent of soil and groundwater contamination at the site, one soil boring will be advanced until three consecutive soil samples that contain no physical evidence (odor, PID readings, etc.) of petroleum hydrocarbons are collected or until groundwater is encountered. The estimated maximum depth that will be explored is approximately 80 feet below ground surface (bgs) during this phase of the investigation. The soil boring will be advanced through the excavation area of the former 1,000-gallon UST, identified as Tank #3, at the approximate location where the 1986 soil sample was collected. The proposed boring location is shown on Figure 2. The soil boring will be advanced until three consecutive soil samples that contain no physical evidence (odor, PID readings, etc.) of petroleum hydrocarbons are collected, or to a depth of approximately 80 feet using a hollow stem auger equipped drill rig. Drilling will be conducted by a State-licensed (C57) drilling company. A field geologist will be present to log all drill cuttings and soil samples. Descriptions of soil types encountered and sample collection intervals will be recorded on boring logs. Soil samples will be collected at five-foot intervals or significant changes in lithology, field screened with a PID, and at least two samples from the boring will be submitted for laboratory analysis. All drill cuttings will be contained in 55-gallon DOT approved drums until laboratory results are received. Groundwater is estimated to exist at 70 feet bgs at the site. If groundwater is encountered in the boring, a grab groundwater sample will be collected from the boring using a disposable bailer. After the groundwater sample is collected, we will continue to collect soil samples to depth of approximately 80 feet. Following soil and groundwater sample collection the open sampling hole will be grouted through a tremie pipe to the surface with neat cement. If field observations (i.e., visual inspection, PID readings, olfaction) indicate the presence of petroleum hydrocarbons in the boring, additional borings may be required to fully delineate the extent of contamination. The need for additional borings will be discussed with PHS/EHD and the client prior to performing additional work. w:\1 a565Vq>orWv&p.dm 2