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SCOPE OF WORK Plannin2 and Permits ATC/Smith Technology has completed the soil boring permit application for the proposed subsurface investigation. Upon approval of this workplan a permit application and associated fees will be submitted to PHS/EHD. ATC/Smith Technology 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 Barin s To determine the extent of soil and groundwater contamination at the site, three soil borings will be advanced to approximately 60 feet below ground surface (bgs) during this phase of the investigation. Two of the borings will be placed inside the excavation area of the former 3,000- gallon UST at the approximate locations where the 1987 soil samples were collected. The third soil boring will be placed inside the excavation area of the former 7,000-gallon UST at the approximate location where the 1987 soil sample was collected. Proposed boring locations are shown on Figure 2. The three soil borings will be advanced to depths of approximately 60 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/well logs. Soil samples will be collected at five foot intervals or changes in lithology, field screened with a PID, and up to two samples from each of the three borings will be submitted for laboratory analysis. All drill cuttings will be spread out on visquene plastic until laboratory results are received. Groundwater is estimated to exist at 55 feet bgs at the site. If groundwater is encountered in the borings, a Hydropunch groundwater sampling probe will be hydraulically driven into the ground in each boring to depths of 1 to 2 feet beneath the groundwater piezometric surface. A field geologist will be present to supervise the investigation and collect groundwater samples and descriptions of field conditions encountered and sample collection details will be recorded. Following soil and groundwater sample collection the open sampling holes will be tremie grouted to the surface with neat cement. If field observations (i.e., visual inspection, PID readings, olfaction) indicate the presence of petroleum hydrocarbons in any of the borings, 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:11498ftepotUs wkp.doc 2 • SI"H